Solyoh32

Chromium Code Search Pesquisar código ou arquivos RETURN TO CODE SEARCH V1 Repositório keyboard_arrow_right Branch Branch keyboard_arrow_right Caminho do arquivo v8/include/v8.h include cppgc libplatform APIDesign.md DEPS OWNERS js_protocol-1.2.json js_protocol-1.3.json js_protocol.pdl v8-fast-api-calls.h v8-inspector-protocol.h v8-inspector.h v8-internal.h v8-platform.h v8-profiler.h v8-util.h v8-value-serializer-version.h v8-version-string.h v8-version.h v8-wasm-trap-handler-posix.h v8-wasm-trap-handler-win.h v8.h v8config.h v8.h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404 5405 5406 5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719 5720 5721 5722 5723 5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911 5912 5913 5914 5915 5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589 6590 6591 6592 6593 6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096 7097 7098 7099 7100 7101 7102 7103 7104 7105 7106 7107 7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143 7144 7145 7146 7147 7148 7149 7150 7151 7152 7153 7154 7155 7156 7157 7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200 7201 7202 7203 7204 7205 7206 7207 7208 7209 7210 7211 7212 7213 7214 7215 7216 7217 7218 7219 7220 7221 7222 7223 7224 7225 7226 7227 7228 7229 7230 7231 7232 7233 7234 7235 7236 7237 7238 7239 7240 7241 7242 7243 7244 7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294 7295 7296 7297 7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308 7309 7310 7311 7312 7313 7314 7315 7316 7317 7318 7319 7320 7321 7322 7323 7324 7325 7326 7327 7328 7329 7330 7331 7332 7333 7334 7335 7336 7337 7338 7339 7340 7341 7342 7343 7344 7345 7346 7347 7348 7349 7350 7351 7352 7353 7354 7355 7356 7357 7358 7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376 7377 7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389 7390 7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407 7408 7409 7410 7411 7412 7413 7414 7415 7416 7417 7418 7419 7420 7421 7422 7423 7424 7425 7426 7427 7428 7429 7430 7431 7432 7433 7434 7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446 7447 7448 7449 7450 7451 7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468 7469 7470 7471 7472 7473 7474 7475 7476 7477 7478 7479 7480 7481 7482 7483 7484 7485 7486 7487 7488 7489 7490 7491 7492 7493 7494 7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509 7510 7511 7512 7513 7514 7515 7516 7517 7518 7519 7520 7521 7522 7523 7524 7525 7526 7527 7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548 7549 7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560 7561 7562 7563 7564 7565 7566 7567 7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578 7579 7580 7581 7582 7583 7584 7585 7586 7587 7588 7589 7590 7591 7592 7593 7594 7595 7596 7597 7598 7599 7600 7601 7602 7603 7604 7605 7606 7607 7608 7609 7610 7611 7612 7613 7614 7615 7616 7617 7618 7619 7620 7621 7622 7623 7624 7625 7626 7627 7628 7629 7630 7631 7632 7633 7634 7635 7636 7637 7638 7639 7640 7641 7642 7643 7644 7645 7646 7647 7648 7649 7650 7651 7652 7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677 7678 7679 7680 7681 7682 7683 7684 7685 7686 7687 7688 7689 7690 7691 7692 7693 7694 7695 7696 7697 7698 7699 7700 7701 7702 7703 7704 7705 7706 7707 7708 7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732 7733 7734 7735 7736 7737 7738 7739 7740 7741 7742 7743 7744 7745 7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771 7772 7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795 7796 7797 7798 7799 7800 7801 7802 7803 7804 7805 7806 7807 7808 7809 7810 7811 7812 7813 7814 7815 7816 7817 7818 7819 7820 7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838 7839 7840 7841 7842 7843 7844 7845 7846 7847 7848 7849 7850 7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862 7863 7864 7865 7866 7867 7868 7869 7870 7871 7872 7873 7874 7875 7876 7877 7878 7879 7880 7881 7882 7883 7884 7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 7921 7922 7923 7924 7925 7926 7927 7928 7929 7930 7931 7932 7933 7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945 7946 7947 7948 7949 7950 7951 7952 7953 7954 7955 7956 7957 7958 7959 7960 7961 7962 7963 7964 7965 7966 7967 7968 7969 7970 7971 7972 7973 7974 7975 7976 7977 7978 7979 7980 7981 7982 7983 7984 7985 7986 7987 7988 7989 7990 7991 7992 7993 7994 7995 7996 7997 7998 7999 8000 8001 8002 8003 8004 8005 8006 8007 8008 8009 8010 8011 8012 8013 8014 8015 8016 8017 8018 8019 8020 8021 8022 8023 8024 8025 8026 8027 8028 8029 8030 8031 8032 8033 8034 8035 8036 8037 8038 8039 8040 8041 8042 8043 8044 8045 8046 8047 8048 8049 8050 8051 8052 8053 8054 8055 8056 8057 8058 8059 8060 8061 8062 8063 8064 8065 8066 8067 8068 8069 8070 8071 8072 8073 8074 8075 8076 8077 8078 8079 8080 8081 8082 8083 8084 8085 8086 8087 8088 8089 8090 8091 8092 8093 8094 8095 8096 8097 8098 8099 8100 8101 8102 8103 8104 8105 8106 8107 8108 8109 8110 8111 8112 8113 8114 8115 8116 8117 8118 8119 8120 8121 8122 8123 8124 8125 8126 8127 8128 8129 8130 8131 8132 8133 8134 8135 8136 8137 8138 8139 8140 8141 8142 8143 8144 8145 8146 8147 8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171 8172 8173 8174 8175 8176 8177 8178 8179 8180 8181 8182 8183 8184 8185 8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202 8203 8204 8205 8206 8207 8208 8209 8210 8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238 8239 8240 8241 8242 8243 8244 8245 8246 8247 8248 8249 8250 8251 8252 8253 8254 8255 8256 8257 8258 8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269 8270 8271 8272 8273 8274 8275 8276 8277 8278 8279 8280 8281 8282 8283 8284 8285 8286 8287 8288 8289 8290 8291 8292 8293 8294 8295 8296 8297 8298 8299 8300 8301 8302 8303 8304 8305 8306 8307 8308 8309 8310 8311 8312 8313 8314 8315 8316 8317 8318 8319 8320 8321 8322 8323 8324 8325 8326 8327 8328 8329 8330 8331 8332 8333 8334 8335 8336 8337 8338 8339 8340 8341 8342 8343 8344 8345 8346 8347 8348 8349 8350 8351 8352 8353 8354 8355 8356 8357 8358 8359 8360 8361 8362 8363 8364 8365 8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379 8380 8381 8382 8383 8384 8385 8386 8387 8388 8389 8390 8391 8392 8393 8394 8395 8396 8397 8398 8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411 8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423 8424 8425 8426 8427 8428 8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449 8450 8451 8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465 8466 8467 8468 8469 8470 8471 8472 8473 8474 8475 8476 8477 8478 8479 8480 8481 8482 8483 8484 8485 8486 8487 8488 8489 8490 8491 8492 8493 8494 8495 8496 8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508 8509 8510 8511 8512 8513 8514 8515 8516 8517 8518 8519 8520 8521 8522 8523 8524 8525 8526 8527 8528 8529 8530 8531 8532 8533 8534 8535 8536 8537 8538 8539 8540 8541 8542 8543 8544 8545 8546 8547 8548 8549 8550 8551 8552 8553 8554 8555 8556 8557 8558 8559 8560 8561 8562 8563 8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574 8575 8576 8577 8578 8579 8580 8581 8582 8583 8584 8585 8586 8587 8588 8589 8590 8591 8592 8593 8594 8595 8596 8597 8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612 8613 8614 8615 8616 8617 8618 8619 8620 8621 8622 8623 8624 8625 8626 8627 8628 8629 8630 8631 8632 8633 8634 8635 8636 8637 8638 8639 8640 8641 8642 8643 8644 8645 8646 8647 8648 8649 8650 8651 8652 8653 8654 8655 8656 8657 8658 8659 8660 8661 8662 8663 8664 8665 8666 8667 8668 8669 8670 8671 8672 8673 8674 8675 8676 8677 8678 8679 8680 8681 8682 8683 8684 8685 8686 8687 8688 8689 8690 8691 8692 8693 8694 8695 8696 8697 8698 8699 8700 8701 8702 8703 8704 8705 8706 8707 8708 8709 8710 8711 8712 8713 8714 8715 8716 8717 8718 8719 8720 8721 8722 8723 8724 8725 8726 8727 8728 8729 8730 8731 8732 8733 8734 8735 8736 8737 8738 8739 8740 8741 8742 8743 8744 8745 8746 8747 8748 8749 8750 8751 8752 8753 8754 8755 8756 8757 8758 8759 8760 8761 8762 8763 8764 8765 8766 8767 8768 8769 8770 8771 8772 8773 8774 8775 8776 8777 8778 8779 8780 8781 8782 8783 8784 8785 8786 8787 8788 8789 8790 8791 8792 8793 8794 8795 8796 8797 8798 8799 8800 8801 8802 8803 8804 8805 8806 8807 8808 8809 8810 8811 8812 8813 8814 8815 8816 8817 8818 8819 8820 8821 8822 8823 8824 8825 8826 8827 8828 8829 8830 8831 8832 8833 8834 8835 8836 8837 8838 8839 8840 8841 8842 8843 8844 8845 8846 8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857 8858 8859 8860 8861 8862 8863 8864 8865 8866 8867 8868 8869 8870 8871 8872 8873 8874 8875 8876 8877 8878 8879 8880 8881 8882 8883 8884 8885 8886 8887 8888 8889 8890 8891 8892 8893 8894 8895 8896 8897 8898 8899 8900 8901 8902 8903 8904 8905 8906 8907 8908 8909 8910 8911 8912 8913 8914 8915 8916 8917 8918 8919 8920 8921 8922 8923 8924 8925 8926 8927 8928 8929 8930 8931 8932 8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943 8944 8945 8946 8947 8948 8949 8950 8951 8952 8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964 8965 8966 8967 8968 8969 8970 8971 8972 8973 8974 8975 8976 8977 8978 8979 8980 8981 8982 8983 8984 8985 8986 8987 8988 8989 8990 8991 8992 8993 8994 8995 8996 8997 8998 8999 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 9010 9011 9012 9013 9014 9015 9016 9017 9018 9019 9020 9021 9022 9023 9024 9025 9026 9027 9028 9029 9030 9031 9032 9033 9034 9035 9036 9037 9038 9039 9040 9041 9042 9043 9044 9045 9046 9047 9048 9049 9050 9051 9052 9053 9054 9055 9056 9057 9058 9059 9060 9061 9062 9063 9064 9065 9066 9067 9068 9069 9070 9071 9072 9073 9074 9075 9076 9077 9078 9079 9080 9081 9082 9083 9084 9085 9086 9087 9088 9089 9090 9091 9092 9093 9094 9095 9096 9097 9098 9099 9100 9101 9102 9103 9104 9105 9106 9107 9108 9109 9110 9111 9112 9113 9114 9115 9116 9117 9118 9119 9120 9121 9122 9123 9124 9125 9126 9127 9128 9129 9130 9131 9132 9133 9134 9135 9136 9137 9138 9139 9140 9141 9142 9143 9144 9145 9146 9147 9148 9149 9150 9151 9152 9153 9154 9155 9156 9157 9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169 9170 9171 9172 9173 9174 9175 9176 9177 9178 9179 9180 9181 9182 9183 9184 9185 9186 9187 9188 9189 9190 9191 9192 9193 9194 9195 9196 9197 9198 9199 9200 9201 9202 9203 9204 9205 9206 9207 9208 9209 9210 9211 9212 9213 9214 9215 9216 9217 9218 9219 9220 9221 9222 9223 9224 9225 9226 9227 9228 9229 9230 9231 9232 9233 9234 9235 9236 9237 9238 9239 9240 9241 9242 9243 9244 9245 9246 9247 9248 9249 9250 9251 9252 9253 9254 9255 9256 9257 9258 9259 9260 9261 9262 9263 9264 9265 9266 9267 9268 9269 9270 9271 9272 9273 9274 9275 9276 9277 9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291 9292 9293 9294 9295 9296 9297 9298 9299 9300 9301 9302 9303 9304 9305 9306 9307 9308 9309 9310 9311 9312 9313 9314 9315 9316 9317 9318 9319 9320 9321 9322 9323 9324 9325 9326 9327 9328 9329 9330 9331 9332 9333 9334 9335 9336 9337 9338 9339 9340 9341 9342 9343 9344 9345 9346 9347 9348 9349 9350 9351 9352 9353 9354 9355 9356 9357 9358 9359 9360 9361 9362 9363 9364 9365 9366 9367 9368 9369 9370 9371 9372 9373 9374 9375 9376 9377 9378 9379 9380 9381 9382 9383 9384 9385 9386 9387 9388 9389 9390 9391 9392 9393 9394 9395 9396 9397 9398 9399 9400 9401 9402 9403 9404 9405 9406 9407 9408 9409 9410 9411 9412 9413 9414 9415 9416 9417 9418 9419 9420 9421 9422 9423 9424 9425 9426 9427 9428 9429 9430 9431 9432 9433 9434 9435 9436 9437 9438 9439 9440 9441 9442 9443 9444 9445 9446 9447 9448 9449 9450 9451 9452 9453 9454 9455 9456 9457 9458 9459 9460 9461 9462 9463 9464 9465 9466 9467 9468 9469 9470 9471 9472 9473 9474 9475 9476 9477 9478 9479 9480 9481 9482 9483 9484 9485 9486 9487 9488 9489 9490 9491 9492 9493 9494 9495 9496 9497 9498 9499 9500 9501 9502 9503 9504 9505 9506 9507 9508 9509 9510 9511 9512 9513 9514 9515 9516 9517 9518 9519 9520 9521 9522 9523 9524 9525 9526 9527 9528 9529 9530 9531 9532 9533 9534 9535 9536 9537 9538 9539 9540 9541 9542 9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559 9560 9561 9562 9563 9564 9565 9566 9567 9568 9569 9570 9571 9572 9573 9574 9575 9576 9577 9578 9579 9580 9581 9582 9583 9584 9585 9586 9587 9588 9589 9590 9591 9592 9593 9594 9595 9596 9597 9598 9599 9600 9601 9602 9603 9604 9605 9606 9607 9608 9609 9610 9611 9612 9613 9614 9615 9616 9617 9618 9619 9620 9621 9622 9623 9624 9625 9626 9627 9628 9629 9630 9631 9632 9633 9634 9635 9636 9637 9638 9639 9640 9641 9642 9643 9644 9645 9646 9647 9648 9649 9650 9651 9652 9653 9654 9655 9656 9657 9658 9659 9660 9661 9662 9663 9664 9665 9666 9667 9668 9669 9670 9671 9672 9673 9674 9675 9676 9677 9678 9679 9680 9681 9682 9683 9684 9685 9686 9687 9688 9689 9690 9691 9692 9693 9694 9695 9696 9697 9698 9699 9700 9701 9702 9703 9704 9705 9706 9707 9708 9709 9710 9711 9712 9713 9714 9715 9716 9717 9718 9719 9720 9721 9722 9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733 9734 9735 9736 9737 9738 9739 9740 9741 9742 9743 9744 9745 9746 9747 9748 9749 9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763 9764 9765 9766 9767 9768 9769 9770 9771 9772 9773 9774 9775 9776 9777 9778 9779 9780 9781 9782 9783 9784 9785 9786 9787 9788 9789 9790 9791 9792 9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809 9810 9811 9812 9813 9814 9815 9816 9817 9818 9819 9820 9821 9822 9823 9824 9825 9826 9827 9828 9829 9830 9831 9832 9833 9834 9835 9836 9837 9838 9839 9840 9841 9842 9843 9844 9845 9846 9847 9848 9849 9850 9851 9852 9853 9854 9855 9856 9857 9858 9859 9860 9861 9862 9863 9864 9865 9866 9867 9868 9869 9870 9871 9872 9873 9874 9875 9876 9877 9878 9879 9880 9881 9882 9883 9884 9885 9886 9887 9888 9889 9890 9891 9892 9893 9894 9895 9896 9897 9898 9899 9900 9901 9902 9903 9904 9905 9906 9907 9908 9909 9910 9911 9912 9913 9914 9915 9916 9917 9918 9919 9920 9921 9922 9923 9924 9925 9926 9927 9928 9929 9930 9931 9932 9933 9934 9935 9936 9937 9938 9939 9940 9941 9942 9943 9944 9945 9946 9947 9948 9949 9950 9951 9952 9953 9954 9955 9956 9957 9958 9959 9960 9961 9962 9963 9964 9965 9966 9967 9968 9969 9970 9971 9972 9973 9974 9975 9976 9977 9978 9979 9980 9981 9982 9983 9984 9985 9986 9987 9988 9989 9990 9991 9992 9993 9994 9995 9996 9997 9998 9999 10000 10001 10002 10003 10004 10005 10006 10007 10008 10009 10010 10011 10012 10013 10014 10015 10016 10017 10018 10019 10020 10021 10022 10023 10024 10025 10026 10027 10028 10029 10030 10031 10032 10033 10034 10035 10036 10037 10038 10039 10040 10041 10042 10043 10044 10045 10046 10047 10048 10049 10050 10051 10052 10053 10054 10055 10056 10057 10058 10059 10060 10061 10062 10063 10064 10065 10066 10067 10068 10069 10070 10071 10072 10073 10074 10075 10076 10077 10078 10079 10080 10081 10082 10083 10084 10085 10086 10087 10088 10089 10090 10091 10092 10093 10094 10095 10096 10097 10098 10099 10100 10101 10102 10103 10104 10105 10106 10107 10108 10109 10110 10111 10112 10113 10114 10115 10116 10117 10118 10119 10120 10121 10122 10123 10124 10125 10126 10127 10128 10129 10130 10131 10132 10133 10134 10135 10136 10137 10138 10139 10140 10141 10142 10143 10144 10145 10146 10147 10148 10149 10150 10151 10152 10153 10154 10155 10156 10157 10158 10159 10160 10161 10162 10163 10164 10165 10166 10167 10168 10169 10170 10171 10172 10173 10174 10175 10176 10177 10178 10179 10180 10181 10182 10183 10184 10185 10186 10187 10188 10189 10190 10191 10192 10193 10194 10195 10196 10197 10198 10199 10200 10201 10202 10203 10204 10205 10206 10207 10208 10209 10210 10211 10212 10213 10214 10215 10216 10217 10218 10219 10220 10221 10222 10223 10224 10225 10226 10227 10228 10229 10230 10231 10232 10233 10234 10235 10236 10237 10238 10239 10240 10241 10242 10243 10244 10245 10246 10247 10248 10249 10250 10251 10252 10253 10254 10255 10256 10257 10258 10259 10260 10261 10262 10263 10264 10265 10266 10267 10268 10269 10270 10271 10272 10273 10274 10275 10276 10277 10278 10279 10280 10281 10282 10283 10284 10285 10286 10287 10288 10289 10290 10291 10292 10293 10294 10295 10296 10297 10298 10299 10300 10301 10302 10303 10304 10305 10306 10307 10308 10309 10310 10311 10312 10313 10314 10315 10316 10317 10318 10319 10320 10321 10322 10323 10324 10325 10326 10327 10328 10329 10330 10331 10332 10333 10334 10335 10336 10337 10338 10339 10340 10341 10342 10343 10344 10345 10346 10347 10348 10349 10350 10351 10352 10353 10354 10355 10356 10357 10358 10359 10360 10361 10362 10363 10364 10365 10366 10367 10368 10369 10370 10371 10372 10373 10374 10375 10376 10377 10378 10379 10380 10381 10382 10383 10384 10385 10386 10387 10388 10389 10390 10391 10392 10393 10394 10395 10396 10397 10398 10399 10400 10401 10402 10403 10404 10405 10406 10407 10408 10409 10410 10411 10412 10413 10414 10415 10416 10417 10418 10419 10420 10421 10422 10423 10424 10425 10426 10427 10428 10429 10430 10431 10432 10433 10434 10435 10436 10437 10438 10439 10440 10441 10442 10443 10444 10445 10446 10447 10448 10449 10450 10451 10452 10453 10454 10455 10456 10457 10458 10459 10460 10461 10462 10463 10464 10465 10466 10467 10468 10469 10470 10471 10472 10473 10474 10475 10476 10477 10478 10479 10480 10481 10482 10483 10484 10485 10486 10487 10488 10489 10490 10491 10492 10493 10494 10495 10496 10497 10498 10499 10500 10501 10502 10503 10504 10505 10506 10507 10508 10509 10510 10511 10512 10513 10514 10515 10516 10517 10518 10519 10520 10521 10522 10523 10524 10525 10526 10527 10528 10529 10530 10531 10532 10533 10534 10535 10536 10537 10538 10539 10540 10541 10542 10543 10544 10545 10546 10547 10548 10549 10550 10551 10552 10553 10554 10555 10556 10557 10558 10559 10560 10561 10562 10563 10564 10565 10566 10567 10568 10569 10570 10571 10572 10573 10574 10575 10576 10577 10578 10579 10580 10581 10582 10583 10584 10585 10586 10587 10588 10589 10590 10591 10592 10593 10594 10595 10596 10597 10598 10599 10600 10601 10602 10603 10604 10605 10606 10607 10608 10609 10610 10611 10612 10613 10614 10615 10616 10617 10618 10619 10620 10621 10622 10623 10624 10625 10626 10627 10628 10629 10630 10631 10632 10633 10634 10635 10636 10637 10638 10639 10640 10641 10642 10643 10644 10645 10646 10647 10648 10649 10650 10651 10652 10653 10654 10655 10656 10657 10658 10659 10660 10661 10662 10663 10664 10665 10666 10667 10668 10669 10670 10671 10672 10673 10674 10675 10676 10677 10678 10679 10680 10681 10682 10683 10684 10685 10686 10687 10688 10689 10690 10691 10692 10693 10694 10695 10696 10697 10698 10699 10700 10701 10702 10703 10704 10705 10706 10707 10708 10709 10710 10711 10712 10713 10714 10715 10716 10717 10718 10719 10720 10721 10722 10723 10724 10725 10726 10727 10728 10729 10730 10731 10732 10733 10734 10735 10736 10737 10738 10739 10740 10741 10742 10743 10744 10745 10746 10747 10748 10749 10750 10751 10752 10753 10754 10755 10756 10757 10758 10759 10760 10761 10762 10763 10764 10765 10766 10767 10768 10769 10770 10771 10772 10773 10774 10775 10776 10777 10778 10779 10780 10781 10782 10783 10784 10785 10786 10787 10788 10789 10790 10791 10792 10793 10794 10795 10796 10797 10798 10799 10800 10801 10802 10803 10804 10805 10806 10807 10808 10809 10810 10811 10812 10813 10814 10815 10816 10817 10818 10819 10820 10821 10822 10823 10824 10825 10826 10827 10828 10829 10830 10831 10832 10833 10834 10835 10836 10837 10838 10839 10840 10841 10842 10843 10844 10845 10846 10847 10848 10849 10850 10851 10852 10853 10854 10855 10856 10857 10858 10859 10860 10861 10862 10863 10864 10865 10866 10867 10868 10869 10870 10871 10872 10873 10874 10875 10876 10877 10878 10879 10880 10881 10882 10883 10884 10885 10886 10887 10888 10889 10890 10891 10892 10893 10894 10895 10896 10897 10898 10899 10900 10901 10902 10903 10904 10905 10906 10907 10908 10909 10910 10911 10912 10913 10914 10915 10916 10917 10918 10919 10920 10921 10922 10923 10924 10925 10926 10927 10928 10929 10930 10931 10932 10933 10934 10935 10936 10937 10938 10939 10940 10941 10942 10943 10944 10945 10946 10947 10948 10949 10950 10951 10952 10953 10954 10955 10956 10957 10958 10959 10960 10961 10962 10963 10964 10965 10966 10967 10968 10969 10970 10971 10972 10973 10974 10975 10976 10977 10978 10979 10980 10981 10982 10983 10984 10985 10986 10987 10988 10989 10990 10991 10992 10993 10994 10995 10996 10997 10998 10999 11000 11001 11002 11003 11004 11005 11006 11007 11008 11009 11010 11011 11012 11013 11014 11015 11016 11017 11018 11019 11020 11021 11022 11023 11024 11025 11026 11027 11028 11029 11030 11031 11032 11033 11034 11035 11036 11037 11038 11039 11040 11041 11042 11043 11044 11045 11046 11047 11048 11049 11050 11051 11052 11053 11054 11055 11056 11057 11058 11059 11060 11061 11062 11063 11064 11065 11066 11067 11068 11069 11070 11071 11072 11073 11074 11075 11076 11077 11078 11079 11080 11081 11082 11083 11084 11085 11086 11087 11088 11089 11090 11091 11092 11093 11094 11095 11096 11097 11098 11099 11100 11101 11102 11103 11104 11105 11106 11107 11108 11109 11110 11111 11112 11113 11114 11115 11116 11117 11118 11119 11120 11121 11122 11123 11124 11125 11126 11127 11128 11129 11130 11131 11132 11133 11134 11135 11136 11137 11138 11139 11140 11141 11142 11143 11144 11145 11146 11147 11148 11149 11150 11151 11152 11153 11154 11155 11156 11157 11158 11159 11160 11161 11162 11163 11164 11165 11166 11167 11168 11169 11170 11171 11172 11173 11174 11175 11176 11177 11178 11179 11180 11181 11182 11183 11184 11185 11186 11187 11188 11189 11190 11191 11192 11193 11194 11195 11196 11197 11198 11199 11200 11201 11202 11203 11204 11205 11206 11207 11208 11209 11210 11211 11212 11213 11214 11215 11216 11217 11218 11219 11220 11221 11222 11223 11224 11225 11226 11227 11228 11229 11230 11231 11232 11233 11234 11235 11236 11237 11238 11239 11240 11241 11242 11243 11244 11245 11246 11247 11248 11249 11250 11251 11252 11253 11254 11255 11256 11257 11258 11259 11260 11261 11262 11263 11264 11265 11266 11267 11268 11269 11270 11271 11272 11273 11274 11275 11276 11277 11278 11279 11280 11281 11282 11283 11284 11285 11286 11287 11288 11289 11290 11291 11292 11293 11294 11295 11296 11297 11298 11299 11300 11301 11302 11303 11304 11305 11306 11307 11308 11309 11310 11311 11312 11313 11314 11315 11316 11317 11318 11319 11320 11321 11322 11323 11324 11325 11326 11327 11328 11329 11330 11331 11332 11333 11334 11335 11336 11337 11338 11339 11340 11341 11342 11343 11344 11345 11346 11347 11348 11349 11350 11351 11352 11353 11354 11355 11356 11357 11358 11359 11360 11361 11362 11363 11364 11365 11366 11367 11368 11369 11370 11371 11372 11373 11374 11375 11376 11377 11378 11379 11380 11381 11382 11383 11384 11385 11386 11387 11388 11389 11390 11391 11392 11393 11394 11395 11396 11397 11398 11399 11400 11401 11402 11403 11404 11405 11406 11407 11408 11409 11410 11411 11412 11413 11414 11415 11416 11417 11418 11419 11420 11421 11422 11423 11424 11425 11426 11427 11428 11429 11430 11431 11432 11433 11434 11435 11436 11437 11438 11439 11440 11441 11442 11443 11444 11445 11446 11447 11448 11449 11450 11451 11452 11453 11454 11455 11456 11457 11458 11459 11460 11461 11462 11463 11464 11465 11466 11467 11468 11469 11470 11471 11472 11473 11474 11475 11476 11477 11478 11479 11480 11481 11482 11483 11484 11485 11486 11487 11488 11489 11490 11491 11492 11493 11494 11495 11496 11497 11498 11499 11500 11501 11502 11503 11504 11505 11506 11507 11508 11509 11510 11511 11512 11513 11514 11515 11516 11517 11518 11519 11520 11521 11522 11523 11524 11525 11526 11527 11528 11529 11530 11531 11532 11533 11534 11535 11536 11537 11538 11539 11540 11541 11542 11543 11544 11545 11546 11547 11548 11549 11550 11551 11552 11553 11554 11555 11556 11557 11558 11559 11560 11561 11562 11563 11564 11565 11566 11567 11568 11569 11570 11571 11572 11573 11574 11575 11576 11577 11578 11579 11580 11581 11582 11583 11584 11585 11586 11587 11588 11589 11590 11591 11592 11593 11594 11595 11596 11597 11598 11599 11600 11601 11602 11603 11604 11605 11606 11607 11608 11609 11610 11611 11612 11613 11614 11615 11616 11617 11618 11619 11620 11621 11622 11623 11624 11625 11626 11627 11628 11629 11630 11631 11632 11633 11634 11635 11636 11637 11638 11639 11640 11641 11642 11643 11644 11645 11646 11647 11648 11649 11650 11651 11652 11653 11654 11655 11656 11657 11658 11659 11660 11661 11662 11663 11664 11665 11666 11667 11668 11669 11670 11671 11672 11673 11674 11675 11676 11677 11678 11679 11680 11681 11682 11683 11684 11685 11686 11687 11688 11689 11690 11691 11692 11693 11694 11695 11696 11697 11698 11699 11700 11701 11702 11703 11704 11705 11706 11707 11708 11709 11710 11711 11712 11713 11714 11715 11716 11717 11718 11719 11720 11721 11722 11723 11724 11725 11726 11727 11728 11729 11730 11731 11732 11733 11734 11735 11736 11737 11738 11739 11740 11741 11742 11743 11744 11745 11746 11747 11748 11749 11750 11751 11752 11753 11754 11755 11756 11757 11758 11759 11760 11761 11762 11763 11764 11765 11766 11767 11768 11769 11770 11771 11772 11773 11774 11775 11776 11777 11778 11779 11780 11781 11782 11783 11784 11785 11786 11787 11788 11789 11790 11791 11792 11793 11794 11795 11796 11797 11798 11799 11800 11801 11802 11803 11804 11805 11806 11807 11808 11809 11810 11811 11812 11813 11814 11815 11816 11817 11818 11819 11820 11821 11822 11823 11824 11825 11826 11827 11828 11829 11830 11831 11832 11833 11834 11835 11836 11837 11838 11839 11840 11841 11842 11843 11844 11845 11846 11847 11848 11849 11850 11851 11852 11853 11854 11855 11856 11857 11858 11859 11860 11861 11862 11863 11864 11865 11866 11867 11868 11869 11870 11871 11872 11873 11874 11875 11876 11877 11878 11879 11880 11881 11882 11883 11884 11885 11886 11887 11888 11889 11890 11891 11892 11893 11894 11895 11896 11897 11898 11899 11900 11901 11902 11903 11904 11905 11906 11907 11908 11909 11910 11911 11912 11913 11914 11915 11916 11917 11918 11919 11920 11921 11922 11923 11924 11925 11926 11927 11928 11929 11930 11931 11932 11933 11934 11935 11936 11937 11938 11939 11940 11941 11942 11943 11944 11945 11946 11947 11948 11949 11950 11951 11952 11953 11954 11955 11956 11957 11958 11959 11960 11961 11962 11963 11964 11965 11966 11967 11968 11969 11970 11971 11972 11973 11974 11975 11976 11977 11978 11979 11980 11981 11982 11983 11984 11985 11986 11987 11988 11989 11990 11991 11992 11993 11994 11995 11996 11997 11998 11999 12000 12001 12002 12003 12004 12005 12006 12007 12008 12009 12010 12011 12012 12013 12014 12015 12016 12017 12018 12019 12020 12021 12022 12023 12024 12025 12026 12027 12028 12029 12030 12031 12032 12033 12034 12035 12036 12037 12038 12039 12040 12041 12042 12043 12044 // Copyright 2012 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. /** \mainpage V8 API Reference Guide * * V8 is Google's open source JavaScript engine. * * This set of documents provides reference material generated from the * V8 header file, include/v8.h. * * For other documentation see https://v8.dev/. */ #ifndef INCLUDE_V8_H_ #define INCLUDE_V8_H_ #include <stddef.h> #include <stdint.h> #include <stdio.h> #include <memory> #include <string> #include <type_traits> #include <utility> #include <vector> #include "cppgc/common.h" #include "v8-internal.h" // NOLINT(build/include_directory) #include "v8-version.h" // NOLINT(build/include_directory) #include "v8config.h" // NOLINT(build/include_directory) // We reserve the V8_* prefix for macros defined in V8 public API and // assume there are no name conflicts with the embedder's code. /** * The v8 JavaScript engine. */ namespace v8 { class AccessorSignature; class Array; class ArrayBuffer; class BigInt; class BigIntObject; class Boolean; class BooleanObject; class Context; class Data; class Date; class External; class Function; class FunctionTemplate; class HeapProfiler; class ImplementationUtilities; class Int32; class Integer; class Isolate; template <class T> class Maybe; class MicrotaskQueue; class Name; class Number; class NumberObject; class Object; class ObjectOperationDescriptor; class ObjectTemplate; class Platform; class Primitive; class Promise; class PropertyDescriptor; class Proxy; class RawOperationDescriptor; class Script; class SharedArrayBuffer; class Signature; class StartupData; class StackFrame; class StackTrace; class String; class StringObject; class Symbol; class SymbolObject; class PrimitiveArray; class Private; class Uint32; class Utils; class Value; class WasmModuleObject; template <class T> class Local; template <class T> class MaybeLocal; template <class T> class Eternal; template<class T> class NonCopyablePersistentTraits; template<class T> class PersistentBase; template <class T, class M = NonCopyablePersistentTraits<T> > class Persistent; template <class T> class Global; template <class T> class TracedGlobal; template <class T> class TracedReference; template <class T> class TracedReferenceBase; template<class K, class V, class T> class PersistentValueMap; template <class K, class V, class T> class PersistentValueMapBase; template <class K, class V, class T> class GlobalValueMap; template<class V, class T> class PersistentValueVector; template<class T, class P> class WeakCallbackObject; class FunctionTemplate; class ObjectTemplate; template<typename T> class FunctionCallbackInfo; template<typename T> class PropertyCallbackInfo; class StackTrace; class StackFrame; class Isolate; class CallHandlerHelper; class EscapableHandleScope; template<typename T> class ReturnValue; namespace internal { enum class ArgumentsType; template <ArgumentsType> class Arguments; template <typename T> class CustomArguments; class DeferredHandles; class FunctionCallbackArguments; class GlobalHandles; class Heap; class HeapObject; class ExternalString; class Isolate; class LocalEmbedderHeapTracer; class MicrotaskQueue; class PropertyCallbackArguments; class ReadOnlyHeap; class ScopedExternalStringLock; struct ScriptStreamingData; class ThreadLocalTop; namespace wasm { class NativeModule; class StreamingDecoder; } // namespace wasm } // namespace internal namespace debug { class ConsoleCallArguments; } // namespace debug // --- Handles --- /** * An object reference managed by the v8 garbage collector. * * All objects returned from v8 have to be tracked by the garbage * collector so that it knows that the objects are still alive. Also, * because the garbage collector may move objects, it is unsafe to * point directly to an object. Instead, all objects are stored in * handles which are known by the garbage collector and updated * whenever an object moves. Handles should always be passed by value * (except in cases like out-parameters) and they should never be * allocated on the heap. * * There are two types of handles: local and persistent handles. * * Local handles are light-weight and transient and typically used in * local operations. They are managed by HandleScopes. That means that a * HandleScope must exist on the stack when they are created and that they are * only valid inside of the HandleScope active during their creation. * For passing a local handle to an outer HandleScope, an EscapableHandleScope * and its Escape() method must be used. * * Persistent handles can be used when storing objects across several * independent operations and have to be explicitly deallocated when they're no * longer used. * * It is safe to extract the object stored in the handle by * dereferencing the handle (for instance, to extract the Object* from * a Local<Object>); the value will still be governed by a handle * behind the scenes and the same rules apply to these values as to * their handles. */ template <class T> class Local { public: V8_INLINE Local() : val_(nullptr) {} template <class S> V8_INLINE Local(Local<S> that)  : val_(reinterpret_cast<T*>(*that)) { /** * This check fails when trying to convert between incompatible * handles. For example, converting from a Local<String> to a * Local<Number>. */ static_assert(std::is_base_of<T, S>::value, "type check"); } /** * Returns true if the handle is empty. */ V8_INLINE bool IsEmpty() const { return val_ == nullptr; } /** * Sets the handle to be empty. IsEmpty() will then return true. */ V8_INLINE void Clear() { val_ = nullptr; } V8_INLINE T* operator->() const { return val_; } V8_INLINE T* operator*() const { return val_; } /** * Checks whether two handles are the same. * Returns true if both are empty, or if the objects to which they refer * are identical. * * If both handles refer to JS objects, this is the same as strict equality. * For primitives, such as numbers or strings, a `false` return value does not * indicate that the values aren't equal in the JavaScript sense. * Use `Value::StrictEquals()` to check primitives for equality. */ template <class S> V8_INLINE bool operator==(const Local<S>& that) const { internal::Address* a = reinterpret_cast<internal::Address*>(this->val_); internal::Address* b = reinterpret_cast<internal::Address*>(that.val_); if (a == nullptr) return b == nullptr; if (b == nullptr) return false; return *a == *b; } template <class S> V8_INLINE bool operator==( const PersistentBase<S>& that) const { internal::Address* a = reinterpret_cast<internal::Address*>(this->val_); internal::Address* b = reinterpret_cast<internal::Address*>(that.val_); if (a == nullptr) return b == nullptr; if (b == nullptr) return false; return *a == *b; } /** * Checks whether two handles are different. * Returns true if only one of the handles is empty, or if * the objects to which they refer are different. * * If both handles refer to JS objects, this is the same as strict * non-equality. For primitives, such as numbers or strings, a `true` return * value does not indicate that the values aren't equal in the JavaScript * sense. Use `Value::StrictEquals()` to check primitives for equality. */ template <class S> V8_INLINE bool operator!=(const Local<S>& that) const { return !operator==(that); } template <class S> V8_INLINE bool operator!=( const Persistent<S>& that) const { return !operator==(that); } /** * Cast a handle to a subclass, e.g. Local<Value> to Local<Object>. * This is only valid if the handle actually refers to a value of the * target type. */ template <class S> V8_INLINE static Local<T> Cast(Local<S> that) { #ifdef V8_ENABLE_CHECKS // If we're going to perform the type check then we have to check // that the handle isn't empty before doing the checked cast. if (that.IsEmpty()) return Local<T>(); #endif return Local<T>(T::Cast(*that)); } /** * Calling this is equivalent to Local<S>::Cast(). * In particular, this is only valid if the handle actually refers to a value * of the target type. */ template <class S> V8_INLINE Local<S> As() const { return Local<S>::Cast(*this); } /** * Create a local handle for the content of another handle. * The referee is kept alive by the local handle even when * the original handle is destroyed/disposed. */ V8_INLINE static Local<T> New(Isolate* isolate, Local<T> that); V8_INLINE static Local<T> New(Isolate* isolate, const PersistentBase<T>& that); V8_INLINE static Local<T> New(Isolate* isolate, const TracedReferenceBase<T>& that); private: friend class Utils; template<class F> friend class Eternal; template<class F> friend class PersistentBase; template<class F, class M> friend class Persistent; template<class F> friend class Local; template <class F> friend class MaybeLocal; template<class F> friend class FunctionCallbackInfo; template<class F> friend class PropertyCallbackInfo; friend class String; friend class Object; friend class Context; friend class Isolate; friend class Private; template<class F> friend class internal::CustomArguments; friend Local<Primitive> Undefined(Isolate* isolate); friend Local<Primitive> Null(Isolate* isolate); friend Local<Boolean> True(Isolate* isolate); friend Local<Boolean> False(Isolate* isolate); friend class HandleScope; friend class EscapableHandleScope; template <class F1, class F2, class F3> friend class PersistentValueMapBase; template<class F1, class F2> friend class PersistentValueVector; template <class F> friend class ReturnValue; template <class F> friend class Traced; template <class F> friend class TracedGlobal; template <class F> friend class TracedReferenceBase; template <class F> friend class TracedReference; explicit V8_INLINE Local(T* that) : val_(that) {} V8_INLINE static Local<T> New(Isolate* isolate, T* that); T* val_; }; #if !defined(V8_IMMINENT_DEPRECATION_WARNINGS) // Handle is an alias for Local for historical reasons. template <class T> using Handle = Local<T>; #endif /** * A MaybeLocal<> is a wrapper around Local<> that enforces a check whether * the Local<> is empty before it can be used. * * If an API method returns a MaybeLocal<>, the API method can potentially fail * either because an exception is thrown, or because an exception is pending, * e.g. because a previous API call threw an exception that hasn't been caught * yet, or because a TerminateExecution exception was thrown. In that case, an * empty MaybeLocal is returned. */ template <class T> class MaybeLocal { public: V8_INLINE MaybeLocal() : val_(nullptr) {} template <class S> V8_INLINE MaybeLocal(Local<S> that)  : val_(reinterpret_cast<T*>(*that)) { static_assert(std::is_base_of<T, S>::value, "type check"); } V8_INLINE bool IsEmpty() const { return val_ == nullptr; } /** * Converts this MaybeLocal<> to a Local<>. If this MaybeLocal<> is empty, * |false| is returned and |out| is left untouched. */ template <class S> V8_WARN_UNUSED_RESULT V8_INLINE bool ToLocal(Local<S>* out) const { out->val_ = IsEmpty() ? nullptr : this->val_; return !IsEmpty(); } /** * Converts this MaybeLocal<> to a Local<>. If this MaybeLocal<> is empty, * V8 will crash the process. */ V8_INLINE Local<T> ToLocalChecked(); /** * Converts this MaybeLocal<> to a Local<>, using a default value if this * MaybeLocal<> is empty. */ template <class S> V8_INLINE Local<S> FromMaybe(Local<S> default_value) const { return IsEmpty() ? default_value : Local<S>(val_); } private: T* val_; }; /** * Eternal handles are set-once handles that live for the lifetime of the * isolate. */ template <class T> class Eternal { public: V8_INLINE Eternal() : val_(nullptr) {} template <class S> V8_INLINE Eternal(Isolate* isolate, Local<S> handle) : val_(nullptr) { Set(isolate, handle); } // Can only be safely called if already set. V8_INLINE Local<T> Get(Isolate* isolate) const; V8_INLINE bool IsEmpty() const { return val_ == nullptr; } template<class S> V8_INLINE void Set(Isolate* isolate, Local<S> handle); private: T* val_; }; static const int kInternalFieldsInWeakCallback = 2; static const int kEmbedderFieldsInWeakCallback = 2; template <typename T> class WeakCallbackInfo { public: typedef void (*Callback)(const WeakCallbackInfo<T>& data); WeakCallbackInfo(Isolate* isolate, T* parameter, void* embedder_fields[kEmbedderFieldsInWeakCallback], Callback* callback)  : isolate_(isolate), parameter_(parameter), callback_(callback) { for (int i = 0; i < kEmbedderFieldsInWeakCallback; ++i) { embedder_fields_[i] = embedder_fields[i]; } } V8_INLINE Isolate* GetIsolate() const { return isolate_; } V8_INLINE T* GetParameter() const { return parameter_; } V8_INLINE void* GetInternalField(int index) const; // When first called, the embedder MUST Reset() the Global which triggered the // callback. The Global itself is unusable for anything else. No v8 other api // calls may be called in the first callback. Should additional work be // required, the embedder must set a second pass callback, which will be // called after all the initial callbacks are processed. // Calling SetSecondPassCallback on the second pass will immediately crash. void SetSecondPassCallback(Callback callback) const { *callback_ = callback; } private: Isolate* isolate_; T* parameter_; Callback* callback_; void* embedder_fields_[kEmbedderFieldsInWeakCallback]; }; // kParameter will pass a void* parameter back to the callback, kInternalFields // will pass the first two internal fields back to the callback, kFinalizer // will pass a void* parameter back, but is invoked before the object is // actually collected, so it can be resurrected. In the last case, it is not // possible to request a second pass callback. enum class WeakCallbackType { kParameter, kInternalFields, kFinalizer }; /** * An object reference that is independent of any handle scope. Where * a Local handle only lives as long as the HandleScope in which it was * allocated, a PersistentBase handle remains valid until it is explicitly * disposed using Reset(). * * A persistent handle contains a reference to a storage cell within * the V8 engine which holds an object value and which is updated by * the garbage collector whenever the object is moved. A new storage * cell can be created using the constructor or PersistentBase::Reset and * existing handles can be disposed using PersistentBase::Reset. * */ template <class T> class PersistentBase { public: /** * If non-empty, destroy the underlying storage cell * IsEmpty() will return true after this call. */ V8_INLINE void Reset(); /** * If non-empty, destroy the underlying storage cell * and create a new one with the contents of other if other is non empty */ template <class S> V8_INLINE void Reset(Isolate* isolate, const Local<S>& other); /** * If non-empty, destroy the underlying storage cell * and create a new one with the contents of other if other is non empty */ template <class S> V8_INLINE void Reset(Isolate* isolate, const PersistentBase<S>& other); V8_INLINE bool IsEmpty() const { return val_ == nullptr; } V8_INLINE void Empty() { val_ = 0; } V8_INLINE Local<T> Get(Isolate* isolate) const { return Local<T>::New(isolate, *this); } template <class S> V8_INLINE bool operator==(const PersistentBase<S>& that) const { internal::Address* a = reinterpret_cast<internal::Address*>(this->val_); internal::Address* b = reinterpret_cast<internal::Address*>(that.val_); if (a == nullptr) return b == nullptr; if (b == nullptr) return false; return *a == *b; } template <class S> V8_INLINE bool operator==(const Local<S>& that) const { internal::Address* a = reinterpret_cast<internal::Address*>(this->val_); internal::Address* b = reinterpret_cast<internal::Address*>(that.val_); if (a == nullptr) return b == nullptr; if (b == nullptr) return false; return *a == *b; } template <class S> V8_INLINE bool operator!=(const PersistentBase<S>& that) const { return !operator==(that); } template <class S> V8_INLINE bool operator!=(const Local<S>& that) const { return !operator==(that); } /** * Install a finalization callback on this object. * NOTE: There is no guarantee as to *when* or even *if* the callback is * invoked. The invocation is performed solely on a best effort basis. * As always, GC-based finalization should *not* be relied upon for any * critical form of resource management! * * The callback is supposed to reset the handle. No further V8 API may be * called in this callback. In case additional work involving V8 needs to be * done, a second callback can be scheduled using * WeakCallbackInfo<void>::SetSecondPassCallback. */ template <typename P> V8_INLINE void SetWeak(P* parameter, typename WeakCallbackInfo<P>::Callback callback, WeakCallbackType type); /** * Turns this handle into a weak phantom handle without finalization callback. * The handle will be reset automatically when the garbage collector detects * that the object is no longer reachable. * A related function Isolate::NumberOfPhantomHandleResetsSinceLastCall * returns how many phantom handles were reset by the garbage collector. */ V8_INLINE void SetWeak(); template<typename P> V8_INLINE P* ClearWeak(); // TODO(dcarney): remove this. V8_INLINE void ClearWeak() { ClearWeak<void>(); } /** * Annotates the strong handle with the given label, which is then used by the * heap snapshot generator as a name of the edge from the root to the handle. * The function does not take ownership of the label and assumes that the * label is valid as long as the handle is valid. */ V8_INLINE void AnnotateStrongRetainer(const char* label); /** Returns true if the handle's reference is weak. */ V8_INLINE bool IsWeak() const; /** * Assigns a wrapper class ID to the handle. */ V8_INLINE void SetWrapperClassId(uint16_t class_id); /** * Returns the class ID previously assigned to this handle or 0 if no class ID * was previously assigned. */ V8_INLINE uint16_t WrapperClassId() const; PersistentBase(const PersistentBase& other) = delete; // NOLINT void operator=(const PersistentBase&) = delete; private: friend class Isolate; friend class Utils; template<class F> friend class Local; template<class F1, class F2> friend class Persistent; template <class F> friend class Global; template<class F> friend class PersistentBase; template<class F> friend class ReturnValue; template <class F1, class F2, class F3> friend class PersistentValueMapBase; template<class F1, class F2> friend class PersistentValueVector; friend class Object; explicit V8_INLINE PersistentBase(T* val) : val_(val) {} V8_INLINE static T* New(Isolate* isolate, T* that); T* val_; }; /** * Default traits for Persistent. This class does not allow * use of the copy constructor or assignment operator. * At present kResetInDestructor is not set, but that will change in a future * version. */ template<class T> class NonCopyablePersistentTraits { public: typedef Persistent<T, NonCopyablePersistentTraits<T> > NonCopyablePersistent; static const bool kResetInDestructor = false; template<class S, class M> V8_INLINE static void Copy(const Persistent<S, M>& source, NonCopyablePersistent* dest) { static_assert(sizeof(S) < 0, "NonCopyablePersistentTraits::Copy is not instantiable"); } }; /** * Helper class traits to allow copying and assignment of Persistent. * This will clone the contents of storage cell, but not any of the flags, etc. */ template<class T> struct CopyablePersistentTraits { typedef Persistent<T, CopyablePersistentTraits<T> > CopyablePersistent; static const bool kResetInDestructor = true; template<class S, class M> static V8_INLINE void Copy(const Persistent<S, M>& source, CopyablePersistent* dest) { // do nothing, just allow copy } }; /** * A PersistentBase which allows copy and assignment. * * Copy, assignment and destructor behavior is controlled by the traits * class M. * * Note: Persistent class hierarchy is subject to future changes. */ template <class T, class M> class Persistent : public PersistentBase<T> { public: /** * A Persistent with no storage cell. */ V8_INLINE Persistent() : PersistentBase<T>(nullptr) {} /** * Construct a Persistent from a Local. * When the Local is non-empty, a new storage cell is created * pointing to the same object, and no flags are set. */ template <class S> V8_INLINE Persistent(Isolate* isolate, Local<S> that)  : PersistentBase<T>(PersistentBase<T>::New(isolate, *that)) { static_assert(std::is_base_of<T, S>::value, "type check"); } /** * Construct a Persistent from a Persistent. * When the Persistent is non-empty, a new storage cell is created * pointing to the same object, and no flags are set. */ template <class S, class M2> V8_INLINE Persistent(Isolate* isolate, const Persistent<S, M2>& that)  : PersistentBase<T>(PersistentBase<T>::New(isolate, *that)) { static_assert(std::is_base_of<T, S>::value, "type check"); } /** * The copy constructors and assignment operator create a Persistent * exactly as the Persistent constructor, but the Copy function from the * traits class is called, allowing the setting of flags based on the * copied Persistent. */ V8_INLINE Persistent(const Persistent& that) : PersistentBase<T>(nullptr) { Copy(that); } template <class S, class M2> V8_INLINE Persistent(const Persistent<S, M2>& that) : PersistentBase<T>(0) { Copy(that); } V8_INLINE Persistent& operator=(const Persistent& that) { Copy(that); return *this; } template <class S, class M2> V8_INLINE Persistent& operator=(const Persistent<S, M2>& that) { // NOLINT Copy(that); return *this; } /** * The destructor will dispose the Persistent based on the * kResetInDestructor flags in the traits class. Since not calling dispose * can result in a memory leak, it is recommended to always set this flag. */ V8_INLINE ~Persistent() { if (M::kResetInDestructor) this->Reset(); } // TODO(dcarney): this is pretty useless, fix or remove template <class S> V8_INLINE static Persistent<T>& Cast(const Persistent<S>& that) { // NOLINT #ifdef V8_ENABLE_CHECKS // If we're going to perform the type check then we have to check // that the handle isn't empty before doing the checked cast. if (!that.IsEmpty()) T::Cast(*that); #endif return reinterpret_cast<Persistent<T>&>(const_cast<Persistent<S>&>(that)); } // TODO(dcarney): this is pretty useless, fix or remove template <class S> V8_INLINE Persistent<S>& As() const { // NOLINT return Persistent<S>::Cast(*this); } private: friend class Isolate; friend class Utils; template<class F> friend class Local; template<class F1, class F2> friend class Persistent; template<class F> friend class ReturnValue; explicit V8_INLINE Persistent(T* that) : PersistentBase<T>(that) {} V8_INLINE T* operator*() const { return this->val_; } template<class S, class M2> V8_INLINE void Copy(const Persistent<S, M2>& that); }; /** * A PersistentBase which has move semantics. * * Note: Persistent class hierarchy is subject to future changes. */ template <class T> class Global : public PersistentBase<T> { public: /** * A Global with no storage cell. */ V8_INLINE Global() : PersistentBase<T>(nullptr) {} /** * Construct a Global from a Local. * When the Local is non-empty, a new storage cell is created * pointing to the same object, and no flags are set. */ template <class S> V8_INLINE Global(Isolate* isolate, Local<S> that)  : PersistentBase<T>(PersistentBase<T>::New(isolate, *that)) { static_assert(std::is_base_of<T, S>::value, "type check"); } /** * Construct a Global from a PersistentBase. * When the Persistent is non-empty, a new storage cell is created * pointing to the same object, and no flags are set. */ template <class S> V8_INLINE Global(Isolate* isolate, const PersistentBase<S>& that)  : PersistentBase<T>(PersistentBase<T>::New(isolate, that.val_)) { static_assert(std::is_base_of<T, S>::value, "type check"); } /** * Move constructor. */ V8_INLINE Global(Global&& other); V8_INLINE ~Global() { this->Reset(); } /** * Move via assignment. */ template <class S> V8_INLINE Global& operator=(Global<S>&& rhs); /** * Pass allows returning uniques from functions, etc. */ Global Pass() { return static_cast<Global&&>(*this); } // NOLINT /* * For compatibility with Chromium's base::Bind (base::Passed). */ typedef void MoveOnlyTypeForCPP03; Global(const Global&) = delete; void operator=(const Global&) = delete; private: template <class F> friend class ReturnValue; V8_INLINE T* operator*() const { return this->val_; } }; // UniquePersistent is an alias for Global for historical reason. template <class T> using UniquePersistent = Global<T>; /** * Deprecated. Use |TracedReference<T>| instead. */ template <typename T> struct TracedGlobalTrait {}; /** * A traced handle with copy and move semantics. The handle is to be used * together with |v8::EmbedderHeapTracer| and specifies edges from the embedder * into V8's heap. * * The exact semantics are: * - Tracing garbage collections use |v8::EmbedderHeapTracer|. * - Non-tracing garbage collections refer to * |v8::EmbedderHeapTracer::IsRootForNonTracingGC()| whether the handle should * be treated as root or not. * * Note that the base class cannot be instantiated itself. Choose from * - TracedGlobal * - TracedReference */ template <typename T> class TracedReferenceBase { public: /** * Returns true if this TracedReferenceBase is empty, i.e., has not been * assigned an object. */ bool IsEmpty() const { return val_ == nullptr; } /** * If non-empty, destroy the underlying storage cell. |IsEmpty| will return * true after this call. */ V8_INLINE void Reset(); /** * Construct a Local<T> from this handle. */ Local<T> Get(Isolate* isolate) const { return Local<T>::New(isolate, *this); } template <class S> V8_INLINE bool operator==(const TracedReferenceBase<S>& that) const { internal::Address* a = reinterpret_cast<internal::Address*>(val_); internal::Address* b = reinterpret_cast<internal::Address*>(that.val_); if (a == nullptr) return b == nullptr; if (b == nullptr) return false; return *a == *b; } template <class S> V8_INLINE bool operator==(const Local<S>& that) const { internal::Address* a = reinterpret_cast<internal::Address*>(val_); internal::Address* b = reinterpret_cast<internal::Address*>(that.val_); if (a == nullptr) return b == nullptr; if (b == nullptr) return false; return *a == *b; } template <class S> V8_INLINE bool operator!=(const TracedReferenceBase<S>& that) const { return !operator==(that); } template <class S> V8_INLINE bool operator!=(const Local<S>& that) const { return !operator==(that); } /** * Assigns a wrapper class ID to the handle. */ V8_INLINE void SetWrapperClassId(uint16_t class_id); /** * Returns the class ID previously assigned to this handle or 0 if no class ID * was previously assigned. */ V8_INLINE uint16_t WrapperClassId() const; template <class S> V8_INLINE TracedReferenceBase<S>& As() const { return reinterpret_cast<TracedReferenceBase<S>&>( const_cast<TracedReferenceBase<T>&>(*this)); } private: enum DestructionMode { kWithDestructor, kWithoutDestructor }; /** * An empty TracedReferenceBase without storage cell. */ TracedReferenceBase() = default; V8_INLINE static T* New(Isolate* isolate, T* that, void* slot, DestructionMode destruction_mode); T* val_ = nullptr; friend class EmbedderHeapTracer; template <typename F> friend class Local; friend class Object; template <typename F> friend class TracedGlobal; template <typename F> friend class TracedReference; template <typename F> friend class ReturnValue; }; /** * A traced handle with destructor that clears the handle. For more details see * TracedReferenceBase. */ template <typename T> class TracedGlobal : public TracedReferenceBase<T> { public: using TracedReferenceBase<T>::Reset; /** * Destructor resetting the handle. */ ~TracedGlobal() { this->Reset(); } /** * An empty TracedGlobal without storage cell. */ TracedGlobal() : TracedReferenceBase<T>() {} /** * Construct a TracedGlobal from a Local. * * When the Local is non-empty, a new storage cell is created * pointing to the same object. */ template <class S> TracedGlobal(Isolate* isolate, Local<S> that) : TracedReferenceBase<T>() { this->val_ = this->New(isolate, that.val_, &this->val_, TracedReferenceBase<T>::kWithDestructor); static_assert(std::is_base_of<T, S>::value, "type check"); } /** * Move constructor initializing TracedGlobal from an existing one. */ V8_INLINE TracedGlobal(TracedGlobal&& other) { // Forward to operator=. *this = std::move(other); } /** * Move constructor initializing TracedGlobal from an existing one. */ template <typename S> V8_INLINE TracedGlobal(TracedGlobal<S>&& other) { // Forward to operator=. *this = std::move(other); } /** * Copy constructor initializing TracedGlobal from an existing one. */ V8_INLINE TracedGlobal(const TracedGlobal& other) { // Forward to operator=; *this = other; } /** * Copy constructor initializing TracedGlobal from an existing one. */ template <typename S> V8_INLINE TracedGlobal(const TracedGlobal<S>& other) { // Forward to operator=; *this = other; } /** * Move assignment operator initializing TracedGlobal from an existing one. */ V8_INLINE TracedGlobal& operator=(TracedGlobal&& rhs); /** * Move assignment operator initializing TracedGlobal from an existing one. */ template <class S> V8_INLINE TracedGlobal& operator=(TracedGlobal<S>&& rhs); /** * Copy assignment operator initializing TracedGlobal from an existing one. * * Note: Prohibited when |other| has a finalization callback set through * |SetFinalizationCallback|. */ V8_INLINE TracedGlobal& operator=(const TracedGlobal& rhs); /** * Copy assignment operator initializing TracedGlobal from an existing one. * * Note: Prohibited when |other| has a finalization callback set through * |SetFinalizationCallback|. */ template <class S> V8_INLINE TracedGlobal& operator=(const TracedGlobal<S>& rhs); /** * If non-empty, destroy the underlying storage cell and create a new one with * the contents of other if other is non empty */ template <class S> V8_INLINE void Reset(Isolate* isolate, const Local<S>& other); template <class S> V8_INLINE TracedGlobal<S>& As() const { return reinterpret_cast<TracedGlobal<S>&>( const_cast<TracedGlobal<T>&>(*this)); } /** * Adds a finalization callback to the handle. The type of this callback is * similar to WeakCallbackType::kInternalFields, i.e., it will pass the * parameter and the first two internal fields of the object. * * The callback is then supposed to reset the handle in the callback. No * further V8 API may be called in this callback. In case additional work * involving V8 needs to be done, a second callback can be scheduled using * WeakCallbackInfo<void>::SetSecondPassCallback. */ V8_INLINE void SetFinalizationCallback( void* parameter, WeakCallbackInfo<void>::Callback callback); }; /** * A traced handle without destructor that clears the handle. The embedder needs * to ensure that the handle is not accessed once the V8 object has been * reclaimed. This can happen when the handle is not passed through the * EmbedderHeapTracer. For more details see TracedReferenceBase. * * The reference assumes the embedder has precise knowledge about references at * all times. In case V8 needs to separately handle on-stack references, the * embedder is required to set the stack start through * |EmbedderHeapTracer::SetStackStart|. */ template <typename T> class TracedReference : public TracedReferenceBase<T> { public: using TracedReferenceBase<T>::Reset; /** * An empty TracedReference without storage cell. */ TracedReference() : TracedReferenceBase<T>() {} /** * Construct a TracedReference from a Local. * * When the Local is non-empty, a new storage cell is created * pointing to the same object. */ template <class S> TracedReference(Isolate* isolate, Local<S> that) : TracedReferenceBase<T>() { this->val_ = this->New(isolate, that.val_, &this->val_, TracedReferenceBase<T>::kWithoutDestructor); static_assert(std::is_base_of<T, S>::value, "type check"); } /** * Move constructor initializing TracedReference from an * existing one. */ V8_INLINE TracedReference(TracedReference&& other) { // Forward to operator=. *this = std::move(other); } /** * Move constructor initializing TracedReference from an * existing one. */ template <typename S> V8_INLINE TracedReference(TracedReference<S>&& other) { // Forward to operator=. *this = std::move(other); } /** * Copy constructor initializing TracedReference from an * existing one. */ V8_INLINE TracedReference(const TracedReference& other) { // Forward to operator=; *this = other; } /** * Copy constructor initializing TracedReference from an * existing one. */ template <typename S> V8_INLINE TracedReference(const TracedReference<S>& other) { // Forward to operator=; *this = other; } /** * Move assignment operator initializing TracedGlobal from an existing one. */ V8_INLINE TracedReference& operator=(TracedReference&& rhs); /** * Move assignment operator initializing TracedGlobal from an existing one. */ template <class S> V8_INLINE TracedReference& operator=(TracedReference<S>&& rhs); /** * Copy assignment operator initializing TracedGlobal from an existing one. */ V8_INLINE TracedReference& operator=(const TracedReference& rhs); /** * Copy assignment operator initializing TracedGlobal from an existing one. */ template <class S> V8_INLINE TracedReference& operator=(const TracedReference<S>& rhs); /** * If non-empty, destroy the underlying storage cell and create a new one with * the contents of other if other is non empty */ template <class S> V8_INLINE void Reset(Isolate* isolate, const Local<S>& other); template <class S> V8_INLINE TracedReference<S>& As() const { return reinterpret_cast<TracedReference<S>&>( const_cast<TracedReference<T>&>(*this)); } }; /** * A stack-allocated class that governs a number of local handles. * After a handle scope has been created, all local handles will be * allocated within that handle scope until either the handle scope is * deleted or another handle scope is created. If there is already a * handle scope and a new one is created, all allocations will take * place in the new handle scope until it is deleted. After that, * new handles will again be allocated in the original handle scope. * * After the handle scope of a local handle has been deleted the * garbage collector will no longer track the object stored in the * handle and may deallocate it. The behavior of accessing a handle * for which the handle scope has been deleted is undefined. */ class V8_EXPORT HandleScope { public: explicit HandleScope(Isolate* isolate); ~HandleScope(); /** * Counts the number of allocated handles. */ static int NumberOfHandles(Isolate* isolate); V8_INLINE Isolate* GetIsolate() const { return reinterpret_cast<Isolate*>(isolate_); } HandleScope(const HandleScope&) = delete; void operator=(const HandleScope&) = delete; protected: V8_INLINE HandleScope() = default; void Initialize(Isolate* isolate); static internal::Address* CreateHandle(internal::Isolate* isolate, internal::Address value); private: // Declaring operator new and delete as deleted is not spec compliant. // Therefore declare them private instead to disable dynamic alloc void* operator new(size_t size); void* operator new[](size_t size); void operator delete(void*, size_t); void operator delete[](void*, size_t); internal::Isolate* isolate_; internal::Address* prev_next_; internal::Address* prev_limit_; // Local::New uses CreateHandle with an Isolate* parameter. template<class F> friend class Local; // Object::GetInternalField and Context::GetEmbedderData use CreateHandle with // a HeapObject in their shortcuts. friend class Object; friend class Context; }; /** * A HandleScope which first allocates a handle in the current scope * which will be later filled with the escape value. */ class V8_EXPORT EscapableHandleScope : public HandleScope { public: explicit EscapableHandleScope(Isolate* isolate); V8_INLINE ~EscapableHandleScope() = default; /** * Pushes the value into the previous scope and returns a handle to it. * Cannot be called twice. */ template <class T> V8_INLINE Local<T> Escape(Local<T> value) { internal::Address* slot = Escape(reinterpret_cast<internal::Address*>(*value)); return Local<T>(reinterpret_cast<T*>(slot)); } template <class T> V8_INLINE MaybeLocal<T> EscapeMaybe(MaybeLocal<T> value) { return Escape(value.FromMaybe(Local<T>())); } EscapableHandleScope(const EscapableHandleScope&) = delete; void operator=(const EscapableHandleScope&) = delete; private: // Declaring operator new and delete as deleted is not spec compliant. // Therefore declare them private instead to disable dynamic alloc void* operator new(size_t size); void* operator new[](size_t size); void operator delete(void*, size_t); void operator delete[](void*, size_t); internal::Address* Escape(internal::Address* escape_value); internal::Address* escape_slot_; }; /** * A SealHandleScope acts like a handle scope in which no handle allocations * are allowed. It can be useful for debugging handle leaks. * Handles can be allocated within inner normal HandleScopes. */ class V8_EXPORT SealHandleScope { public: explicit SealHandleScope(Isolate* isolate); ~SealHandleScope(); SealHandleScope(const SealHandleScope&) = delete; void operator=(const SealHandleScope&) = delete; private: // Declaring operator new and delete as deleted is not spec compliant. // Therefore declare them private instead to disable dynamic alloc void* operator new(size_t size); void* operator new[](size_t size); void operator delete(void*, size_t); void operator delete[](void*, size_t); internal::Isolate* const isolate_; internal::Address* prev_limit_; int prev_sealed_level_; }; // --- Special objects --- /** * The superclass of objects that can reside on V8's heap. */ class V8_EXPORT Data { private: Data(); }; /** * A container type that holds relevant metadata for module loading. * * This is passed back to the embedder as part of * HostImportModuleDynamicallyCallback for module loading. */ class V8_EXPORT ScriptOrModule { public: /** * The name that was passed by the embedder as ResourceName to the * ScriptOrigin. This can be either a v8::String or v8::Undefined. */ Local<Value> GetResourceName(); /** * The options that were passed by the embedder as HostDefinedOptions to * the ScriptOrigin. */ Local<PrimitiveArray> GetHostDefinedOptions(); }; /** * An array to hold Primitive values. This is used by the embedder to * pass host defined options to the ScriptOptions during compilation. * * This is passed back to the embedder as part of * HostImportModuleDynamicallyCallback for module loading. * */ class V8_EXPORT PrimitiveArray { public: static Local<PrimitiveArray> New(Isolate* isolate, int length); int Length() const; void Set(Isolate* isolate, int index, Local<Primitive> item); Local<Primitive> Get(Isolate* isolate, int index); }; /** * The optional attributes of ScriptOrigin. */ class ScriptOriginOptions { public: V8_INLINE ScriptOriginOptions(bool is_shared_cross_origin = false, bool is_opaque = false, bool is_wasm = false, bool is_module = false)  : flags_((is_shared_cross_origin ? kIsSharedCrossOrigin : 0) | (is_wasm ? kIsWasm : 0) | (is_opaque ? kIsOpaque : 0) | (is_module ? kIsModule : 0)) {} V8_INLINE ScriptOriginOptions(int flags)  : flags_(flags & (kIsSharedCrossOrigin | kIsOpaque | kIsWasm | kIsModule)) {} bool IsSharedCrossOrigin() const { return (flags_ & kIsSharedCrossOrigin) != 0; } bool IsOpaque() const { return (flags_ & kIsOpaque) != 0; } bool IsWasm() const { return (flags_ & kIsWasm) != 0; } bool IsModule() const { return (flags_ & kIsModule) != 0; } int Flags() const { return flags_; } private: enum { kIsSharedCrossOrigin = 1, kIsOpaque = 1 << 1, kIsWasm = 1 << 2, kIsModule = 1 << 3 }; const int flags_; }; /** * The origin, within a file, of a script. */ class ScriptOrigin { public: V8_INLINE ScriptOrigin( Local<Value> resource_name, Local<Integer> resource_line_offset = Local<Integer>(), Local<Integer> resource_column_offset = Local<Integer>(), Local<Boolean> resource_is_shared_cross_origin = Local<Boolean>(), Local<Integer> script_id = Local<Integer>(), Local<Value> source_map_url = Local<Value>(), Local<Boolean> resource_is_opaque = Local<Boolean>(), Local<Boolean> is_wasm = Local<Boolean>(), Local<Boolean> is_module = Local<Boolean>(), Local<PrimitiveArray> host_defined_options = Local<PrimitiveArray>()); V8_INLINE Local<Value> ResourceName() const; V8_INLINE Local<Integer> ResourceLineOffset() const; V8_INLINE Local<Integer> ResourceColumnOffset() const; V8_INLINE Local<Integer> ScriptID() const; V8_INLINE Local<Value> SourceMapUrl() const; V8_INLINE Local<PrimitiveArray> HostDefinedOptions() const; V8_INLINE ScriptOriginOptions Options() const { return options_; } private: Local<Value> resource_name_; Local<Integer> resource_line_offset_; Local<Integer> resource_column_offset_; ScriptOriginOptions options_; Local<Integer> script_id_; Local<Value> source_map_url_; Local<PrimitiveArray> host_defined_options_; }; /** * A compiled JavaScript script, not yet tied to a Context. */ class V8_EXPORT UnboundScript { public: /** * Binds the script to the currently entered context. */ Local<Script> BindToCurrentContext(); int GetId(); Local<Value> GetScriptName(); /** * Data read from magic sourceURL comments. */ Local<Value> GetSourceURL(); /** * Data read from magic sourceMappingURL comments. */ Local<Value> GetSourceMappingURL(); /** * Returns zero based line number of the code_pos location in the script. * -1 will be returned if no information available. */ int GetLineNumber(int code_pos); static const int kNoScriptId = 0; }; /** * A compiled JavaScript module, not yet tied to a Context. */ class V8_EXPORT UnboundModuleScript : public Data { // Only used as a container for code caching. }; /** * A location in JavaScript source. */ class V8_EXPORT Location { public: int GetLineNumber() { return line_number_; } int GetColumnNumber() { return column_number_; } Location(int line_number, int column_number)  : line_number_(line_number), column_number_(column_number) {} private: int line_number_; int column_number_; }; /** * A compiled JavaScript module. */ class V8_EXPORT Module : public Data { public: /** * The different states a module can be in. * * This corresponds to the states used in ECMAScript except that "evaluated" * is split into kEvaluated and kErrored, indicating success and failure, * respectively. */ enum Status { kUninstantiated, kInstantiating, kInstantiated, kEvaluating, kEvaluated, kErrored }; /** * Returns the module's current status. */ Status GetStatus() const; /** * For a module in kErrored status, this returns the corresponding exception. */ Local<Value> GetException() const; /** * Returns the number of modules requested by this module. */ int GetModuleRequestsLength() const; /** * Returns the ith module specifier in this module. * i must be < GetModuleRequestsLength() and >= 0. */ Local<String> GetModuleRequest(int i) const; /** * Returns the source location (line number and column number) of the ith * module specifier's first occurrence in this module. */ Location GetModuleRequestLocation(int i) const; /** * Returns the identity hash for this object. */ int GetIdentityHash() const; typedef MaybeLocal<Module> (*ResolveCallback)(Local<Context> context, Local<String> specifier, Local<Module> referrer); /** * Instantiates the module and its dependencies. * * Returns an empty Maybe<bool> if an exception occurred during * instantiation. (In the case where the callback throws an exception, that * exception is propagated.) */ V8_WARN_UNUSED_RESULT Maybe<bool> InstantiateModule(Local<Context> context, ResolveCallback callback); /** * Evaluates the module and its dependencies. * * If status is kInstantiated, run the module's code. On success, set status * to kEvaluated and return the completion value; on failure, set status to * kErrored and propagate the thrown exception (which is then also available * via |GetException|). */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> Evaluate(Local<Context> context); /** * Returns the namespace object of this module. * * The module's status must be at least kInstantiated. */ Local<Value> GetModuleNamespace(); /** * Returns the corresponding context-unbound module script. * * The module must be unevaluated, i.e. its status must not be kEvaluating, * kEvaluated or kErrored. */ Local<UnboundModuleScript> GetUnboundModuleScript(); /* * Callback defined in the embedder. This is responsible for setting * the module's exported values with calls to SetSyntheticModuleExport(). * The callback must return a Value to indicate success (where no * exception was thrown) and return an empy MaybeLocal to indicate falure * (where an exception was thrown). */ typedef MaybeLocal<Value> (*SyntheticModuleEvaluationSteps)( Local<Context> context, Local<Module> module); /** * Creates a new SyntheticModule with the specified export names, where * evaluation_steps will be executed upon module evaluation. * export_names must not contain duplicates. * module_name is used solely for logging/debugging and doesn't affect module * behavior. */ static Local<Module> CreateSyntheticModule( Isolate* isolate, Local<String> module_name, const std::vector<Local<String>>& export_names, SyntheticModuleEvaluationSteps evaluation_steps); /** * Set this module's exported value for the name export_name to the specified * export_value. This method must be called only on Modules created via * CreateSyntheticModule. An error will be thrown if export_name is not one * of the export_names that were passed in that CreateSyntheticModule call. * Returns Just(true) on success, Nothing<bool>() if an error was thrown. */ V8_WARN_UNUSED_RESULT Maybe<bool> SetSyntheticModuleExport( Isolate* isolate, Local<String> export_name, Local<Value> export_value); V8_DEPRECATE_SOON( "Use the preceding SetSyntheticModuleExport with an Isolate parameter, " "instead of the one that follows. The former will throw a runtime " "error if called for an export that doesn't exist (as per spec); " "the latter will crash with a failed CHECK().") void SetSyntheticModuleExport(Local<String> export_name, Local<Value> export_value); }; /** * A compiled JavaScript script, tied to a Context which was active when the * script was compiled. */ class V8_EXPORT Script { public: /** * A shorthand for ScriptCompiler::Compile(). */ static V8_WARN_UNUSED_RESULT MaybeLocal<Script> Compile( Local<Context> context, Local<String> source, ScriptOrigin* origin = nullptr); /** * Runs the script returning the resulting value. It will be run in the * context in which it was created (ScriptCompiler::CompileBound or * UnboundScript::BindToCurrentContext()). */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> Run(Local<Context> context); /** * Returns the corresponding context-unbound script. */ Local<UnboundScript> GetUnboundScript(); }; /** * For compiling scripts. */ class V8_EXPORT ScriptCompiler { public: /** * Compilation data that the embedder can cache and pass back to speed up * future compilations. The data is produced if the CompilerOptions passed to * the compilation functions in ScriptCompiler contains produce_data_to_cache * = true. The data to cache can then can be retrieved from * UnboundScript. */ struct V8_EXPORT CachedData { enum BufferPolicy { BufferNotOwned, BufferOwned }; CachedData()  : data(nullptr), length(0), rejected(false), buffer_policy(BufferNotOwned) {} // If buffer_policy is BufferNotOwned, the caller keeps the ownership of // data and guarantees that it stays alive until the CachedData object is // destroyed. If the policy is BufferOwned, the given data will be deleted // (with delete[]) when the CachedData object is destroyed. CachedData(const uint8_t* data, int length, BufferPolicy buffer_policy = BufferNotOwned); ~CachedData(); // TODO(marja): Async compilation; add constructors which take a callback // which will be called when V8 no longer needs the data. const uint8_t* data; int length; bool rejected; BufferPolicy buffer_policy; // Prevent copying. CachedData(const CachedData&) = delete; CachedData& operator=(const CachedData&) = delete; }; /** * Source code which can be then compiled to a UnboundScript or Script. */ class Source { public: // Source takes ownership of CachedData. V8_INLINE Source(Local<String> source_string, const ScriptOrigin& origin, CachedData* cached_data = nullptr); V8_INLINE Source(Local<String> source_string, CachedData* cached_data = nullptr); V8_INLINE ~Source(); // Ownership of the CachedData or its buffers is *not* transferred to the // caller. The CachedData object is alive as long as the Source object is // alive. V8_INLINE const CachedData* GetCachedData() const; V8_INLINE const ScriptOriginOptions& GetResourceOptions() const; // Prevent copying. Source(const Source&) = delete; Source& operator=(const Source&) = delete; private: friend class ScriptCompiler; Local<String> source_string; // Origin information Local<Value> resource_name; Local<Integer> resource_line_offset; Local<Integer> resource_column_offset; ScriptOriginOptions resource_options; Local<Value> source_map_url; Local<PrimitiveArray> host_defined_options; // Cached data from previous compilation (if a kConsume*Cache flag is // set), or hold newly generated cache data (kProduce*Cache flags) are // set when calling a compile method. CachedData* cached_data; }; /** * For streaming incomplete script data to V8. The embedder should implement a * subclass of this class. */ class V8_EXPORT ExternalSourceStream { public: virtual ~ExternalSourceStream() = default; /** * V8 calls this to request the next chunk of data from the embedder. This * function will be called on a background thread, so it's OK to block and * wait for the data, if the embedder doesn't have data yet. Returns the * length of the data returned. When the data ends, GetMoreData should * return 0. Caller takes ownership of the data. * * When streaming UTF-8 data, V8 handles multi-byte characters split between * two data chunks, but doesn't handle multi-byte characters split between * more than two data chunks. The embedder can avoid this problem by always * returning at least 2 bytes of data. * * When streaming UTF-16 data, V8 does not handle characters split between * two data chunks. The embedder has to make sure that chunks have an even * length. * * If the embedder wants to cancel the streaming, they should make the next * GetMoreData call return 0. V8 will interpret it as end of data (and most * probably, parsing will fail). The streaming task will return as soon as * V8 has parsed the data it received so far. */ virtual size_t GetMoreData(const uint8_t** src) = 0; /** * V8 calls this method to set a 'bookmark' at the current position in * the source stream, for the purpose of (maybe) later calling * ResetToBookmark. If ResetToBookmark is called later, then subsequent * calls to GetMoreData should return the same data as they did when * SetBookmark was called earlier. * * The embedder may return 'false' to indicate it cannot provide this * functionality. */ virtual bool SetBookmark(); /** * V8 calls this to return to a previously set bookmark. */ virtual void ResetToBookmark(); }; /** * Source code which can be streamed into V8 in pieces. It will be parsed * while streaming and compiled after parsing has completed. StreamedSource * must be kept alive while the streaming task is run (see ScriptStreamingTask * below). */ class V8_EXPORT StreamedSource { public: enum Encoding { ONE_BYTE, TWO_BYTE, UTF8 }; V8_DEPRECATE_SOON( "This class takes ownership of source_stream, so use the constructor " "taking a unique_ptr to make these semantics clearer") StreamedSource(ExternalSourceStream* source_stream, Encoding encoding); StreamedSource(std::unique_ptr<ExternalSourceStream> source_stream, Encoding encoding); ~StreamedSource(); internal::ScriptStreamingData* impl() const { return impl_.get(); } // Prevent copying. StreamedSource(const StreamedSource&) = delete; StreamedSource& operator=(const StreamedSource&) = delete; private: std::unique_ptr<internal::ScriptStreamingData> impl_; }; /** * A streaming task which the embedder must run on a background thread to * stream scripts into V8. Returned by ScriptCompiler::StartStreamingScript. */ class V8_EXPORT ScriptStreamingTask final { public: void Run(); private: friend class ScriptCompiler; explicit ScriptStreamingTask(internal::ScriptStreamingData* data)  : data_(data) {} internal::ScriptStreamingData* data_; }; enum CompileOptions { kNoCompileOptions = 0, kConsumeCodeCache, kEagerCompile }; /** * The reason for which we are not requesting or providing a code cache. */ enum NoCacheReason { kNoCacheNoReason = 0, kNoCacheBecauseCachingDisabled, kNoCacheBecauseNoResource, kNoCacheBecauseInlineScript, kNoCacheBecauseModule, kNoCacheBecauseStreamingSource, kNoCacheBecauseInspector, kNoCacheBecauseScriptTooSmall, kNoCacheBecauseCacheTooCold, kNoCacheBecauseV8Extension, kNoCacheBecauseExtensionModule, kNoCacheBecausePacScript, kNoCacheBecauseInDocumentWrite, kNoCacheBecauseResourceWithNoCacheHandler, kNoCacheBecauseDeferredProduceCodeCache }; /** * Compiles the specified script (context-independent). * Cached data as part of the source object can be optionally produced to be * consumed later to speed up compilation of identical source scripts. * * Note that when producing cached data, the source must point to NULL for * cached data. When consuming cached data, the cached data must have been * produced by the same version of V8. * * \param source Script source code. * \return Compiled script object (context independent; for running it must be * bound to a context). */ static V8_WARN_UNUSED_RESULT MaybeLocal<UnboundScript> CompileUnboundScript( Isolate* isolate, Source* source, CompileOptions options = kNoCompileOptions, NoCacheReason no_cache_reason = kNoCacheNoReason); /** * Compiles the specified script (bound to current context). * * \param source Script source code. * \param pre_data Pre-parsing data, as obtained by ScriptData::PreCompile() * using pre_data speeds compilation if it's done multiple times. * Owned by caller, no references are kept when this function returns. * \return Compiled script object, bound to the context that was active * when this function was called. When run it will always use this * context. */ static V8_WARN_UNUSED_RESULT MaybeLocal<Script> Compile( Local<Context> context, Source* source, CompileOptions options = kNoCompileOptions, NoCacheReason no_cache_reason = kNoCacheNoReason); /** * Returns a task which streams script data into V8, or NULL if the script * cannot be streamed. The user is responsible for running the task on a * background thread and deleting it. When ran, the task starts parsing the * script, and it will request data from the StreamedSource as needed. When * ScriptStreamingTask::Run exits, all data has been streamed and the script * can be compiled (see Compile below). * * This API allows to start the streaming with as little data as possible, and * the remaining data (for example, the ScriptOrigin) is passed to Compile. */ static ScriptStreamingTask* StartStreamingScript( Isolate* isolate, StreamedSource* source, CompileOptions options = kNoCompileOptions); /** * Compiles a streamed script (bound to current context). * * This can only be called after the streaming has finished * (ScriptStreamingTask has been run). V8 doesn't construct the source string * during streaming, so the embedder needs to pass the full source here. */ static V8_WARN_UNUSED_RESULT MaybeLocal<Script> Compile( Local<Context> context, StreamedSource* source, Local<String> full_source_string, const ScriptOrigin& origin); /** * Return a version tag for CachedData for the current V8 version & flags. * * This value is meant only for determining whether a previously generated * CachedData instance is still valid; the tag has no other meaing. * * Background: The data carried by CachedData may depend on the exact * V8 version number or current compiler flags. This means that when * persisting CachedData, the embedder must take care to not pass in * data from another V8 version, or the same version with different * features enabled. * * The easiest way to do so is to clear the embedder's cache on any * such change. * * Alternatively, this tag can be stored alongside the cached data and * compared when it is being used. */ static uint32_t CachedDataVersionTag(); /** * Compile an ES module, returning a Module that encapsulates * the compiled code. * * Corresponds to the ParseModule abstract operation in the * ECMAScript specification. */ static V8_WARN_UNUSED_RESULT MaybeLocal<Module> CompileModule( Isolate* isolate, Source* source, CompileOptions options = kNoCompileOptions, NoCacheReason no_cache_reason = kNoCacheNoReason); /** * Compile a function for a given context. This is equivalent to running * * with (obj) { * return function(args) { ... } * } * * It is possible to specify multiple context extensions (obj in the above * example). */ static V8_WARN_UNUSED_RESULT MaybeLocal<Function> CompileFunctionInContext( Local<Context> context, Source* source, size_t arguments_count, Local<String> arguments[], size_t context_extension_count, Local<Object> context_extensions[], CompileOptions options = kNoCompileOptions, NoCacheReason no_cache_reason = kNoCacheNoReason, Local<ScriptOrModule>* script_or_module_out = nullptr); /** * Creates and returns code cache for the specified unbound_script. * This will return nullptr if the script cannot be serialized. The * CachedData returned by this function should be owned by the caller. */ static CachedData* CreateCodeCache(Local<UnboundScript> unbound_script); /** * Creates and returns code cache for the specified unbound_module_script. * This will return nullptr if the script cannot be serialized. The * CachedData returned by this function should be owned by the caller. */ static CachedData* CreateCodeCache( Local<UnboundModuleScript> unbound_module_script); /** * Creates and returns code cache for the specified function that was * previously produced by CompileFunctionInContext. * This will return nullptr if the script cannot be serialized. The * CachedData returned by this function should be owned by the caller. */ static CachedData* CreateCodeCacheForFunction(Local<Function> function); private: static V8_WARN_UNUSED_RESULT MaybeLocal<UnboundScript> CompileUnboundInternal( Isolate* isolate, Source* source, CompileOptions options, NoCacheReason no_cache_reason); }; /** * An error message. */ class V8_EXPORT Message { public: Local<String> Get() const; /** * Return the isolate to which the Message belongs. */ Isolate* GetIsolate() const; V8_WARN_UNUSED_RESULT MaybeLocal<String> GetSourceLine( Local<Context> context) const; /** * Returns the origin for the script from where the function causing the * error originates. */ ScriptOrigin GetScriptOrigin() const; /** * Returns the resource name for the script from where the function causing * the error originates. */ Local<Value> GetScriptResourceName() const; /** * Exception stack trace. By default stack traces are not captured for * uncaught exceptions. SetCaptureStackTraceForUncaughtExceptions allows * to change this option. */ Local<StackTrace> GetStackTrace() const; /** * Returns the number, 1-based, of the line where the error occurred. */ V8_WARN_UNUSED_RESULT Maybe<int> GetLineNumber(Local<Context> context) const; /** * Returns the index within the script of the first character where * the error occurred. */ int GetStartPosition() const; /** * Returns the index within the script of the last character where * the error occurred. */ int GetEndPosition() const; /** * Returns the Wasm function index where the error occurred. Returns -1 if * message is not from a Wasm script. */ int GetWasmFunctionIndex() const; /** * Returns the error level of the message. */ int ErrorLevel() const; /** * Returns the index within the line of the first character where * the error occurred. */ int GetStartColumn() const; V8_WARN_UNUSED_RESULT Maybe<int> GetStartColumn(Local<Context> context) const; /** * Returns the index within the line of the last character where * the error occurred. */ int GetEndColumn() const; V8_WARN_UNUSED_RESULT Maybe<int> GetEndColumn(Local<Context> context) const; /** * Passes on the value set by the embedder when it fed the script from which * this Message was generated to V8. */ bool IsSharedCrossOrigin() const; bool IsOpaque() const; // TODO(1245381): Print to a string instead of on a FILE. static void PrintCurrentStackTrace(Isolate* isolate, FILE* out); static const int kNoLineNumberInfo = 0; static const int kNoColumnInfo = 0; static const int kNoScriptIdInfo = 0; static const int kNoWasmFunctionIndexInfo = -1; }; /** * Representation of a JavaScript stack trace. The information collected is a * snapshot of the execution stack and the information remains valid after * execution continues. */ class V8_EXPORT StackTrace { public: /** * Flags that determine what information is placed captured for each * StackFrame when grabbing the current stack trace. * Note: these options are deprecated and we always collect all available * information (kDetailed). */ enum StackTraceOptions { kLineNumber = 1, kColumnOffset = 1 << 1 | kLineNumber, kScriptName = 1 << 2, kFunctionName = 1 << 3, kIsEval = 1 << 4, kIsConstructor = 1 << 5, kScriptNameOrSourceURL = 1 << 6, kScriptId = 1 << 7, kExposeFramesAcrossSecurityOrigins = 1 << 8, kOverview = kLineNumber | kColumnOffset | kScriptName | kFunctionName, kDetailed = kOverview | kIsEval | kIsConstructor | kScriptNameOrSourceURL }; /** * Returns a StackFrame at a particular index. */ Local<StackFrame> GetFrame(Isolate* isolate, uint32_t index) const; /** * Returns the number of StackFrames. */ int GetFrameCount() const; /** * Grab a snapshot of the current JavaScript execution stack. * * \param frame_limit The maximum number of stack frames we want to capture. * \param options Enumerates the set of things we will capture for each * StackFrame. */ static Local<StackTrace> CurrentStackTrace( Isolate* isolate, int frame_limit, StackTraceOptions options = kDetailed); }; /** * A single JavaScript stack frame. */ class V8_EXPORT StackFrame { public: /** * Returns the number, 1-based, of the line for the associate function call. * This method will return Message::kNoLineNumberInfo if it is unable to * retrieve the line number, or if kLineNumber was not passed as an option * when capturing the StackTrace. */ int GetLineNumber() const; /** * Returns the 1-based column offset on the line for the associated function * call. * This method will return Message::kNoColumnInfo if it is unable to retrieve * the column number, or if kColumnOffset was not passed as an option when * capturing the StackTrace. */ int GetColumn() const; /** * Returns the id of the script for the function for this StackFrame. * This method will return Message::kNoScriptIdInfo if it is unable to * retrieve the script id, or if kScriptId was not passed as an option when * capturing the StackTrace. */ int GetScriptId() const; /** * Returns the name of the resource that contains the script for the * function for this StackFrame. */ Local<String> GetScriptName() const; /** * Returns the name of the resource that contains the script for the * function for this StackFrame or sourceURL value if the script name * is undefined and its source ends with //# sourceURL=... string or * deprecated //@ sourceURL=... string. */ Local<String> GetScriptNameOrSourceURL() const; /** * Returns the name of the function associated with this stack frame. */ Local<String> GetFunctionName() const; /** * Returns whether or not the associated function is compiled via a call to * eval(). */ bool IsEval() const; /** * Returns whether or not the associated function is called as a * constructor via "new". */ bool IsConstructor() const; /** * Returns whether or not the associated functions is defined in wasm. */ bool IsWasm() const; /** * Returns whether or not the associated function is defined by the user. */ bool IsUserJavaScript() const; }; // A StateTag represents a possible state of the VM. enum StateTag { JS, GC, PARSER, BYTECODE_COMPILER, COMPILER, OTHER, EXTERNAL, ATOMICS_WAIT, IDLE }; // A RegisterState represents the current state of registers used // by the sampling profiler API. struct RegisterState { RegisterState() : pc(nullptr), sp(nullptr), fp(nullptr), lr(nullptr) {} void* pc; // Instruction pointer. void* sp; // Stack pointer. void* fp; // Frame pointer. void* lr; // Link register (or nullptr on platforms without a link register). }; // The output structure filled up by GetStackSample API function. struct SampleInfo { size_t frames_count; // Number of frames collected. StateTag vm_state; // Current VM state. void* external_callback_entry; // External callback address if VM is // executing an external callback. void* top_context; // Incumbent native context address. }; struct MemoryRange { const void* start = nullptr; size_t length_in_bytes = 0; }; struct JSEntryStub { MemoryRange code; }; struct UnwindState { MemoryRange code_range; MemoryRange embedded_code_range; JSEntryStub js_entry_stub; JSEntryStub js_construct_entry_stub; JSEntryStub js_run_microtasks_entry_stub; }; struct JSEntryStubs { JSEntryStub js_entry_stub; JSEntryStub js_construct_entry_stub; JSEntryStub js_run_microtasks_entry_stub; }; /** * A JSON Parser and Stringifier. */ class V8_EXPORT JSON { public: /** * Tries to parse the string |json_string| and returns it as value if * successful. * * \param the context in which to parse and create the value. * \param json_string The string to parse. * \return The corresponding value if successfully parsed. */ static V8_WARN_UNUSED_RESULT MaybeLocal<Value> Parse( Local<Context> context, Local<String> json_string); /** * Tries to stringify the JSON-serializable object |json_object| and returns * it as string if successful. * * \param json_object The JSON-serializable object to stringify. * \return The corresponding string if successfully stringified. */ static V8_WARN_UNUSED_RESULT MaybeLocal<String> Stringify( Local<Context> context, Local<Value> json_object, Local<String> gap = Local<String>()); }; /** * Value serialization compatible with the HTML structured clone algorithm. * The format is backward-compatible (i.e. safe to store to disk). */ class V8_EXPORT ValueSerializer { public: class V8_EXPORT Delegate { public: virtual ~Delegate() = default; /** * Handles the case where a DataCloneError would be thrown in the structured * clone spec. Other V8 embedders may throw some other appropriate exception * type. */ virtual void ThrowDataCloneError(Local<String> message) = 0; /** * The embedder overrides this method to write some kind of host object, if * possible. If not, a suitable exception should be thrown and * Nothing<bool>() returned. */ virtual Maybe<bool> WriteHostObject(Isolate* isolate, Local<Object> object); /** * Called when the ValueSerializer is going to serialize a * SharedArrayBuffer object. The embedder must return an ID for the * object, using the same ID if this SharedArrayBuffer has already been * serialized in this buffer. When deserializing, this ID will be passed to * ValueDeserializer::GetSharedArrayBufferFromId as |clone_id|. * * If the object cannot be serialized, an * exception should be thrown and Nothing<uint32_t>() returned. */ virtual Maybe<uint32_t> GetSharedArrayBufferId( Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer); virtual Maybe<uint32_t> GetWasmModuleTransferId( Isolate* isolate, Local<WasmModuleObject> module); /** * Allocates memory for the buffer of at least the size provided. The actual * size (which may be greater or equal) is written to |actual_size|. If no * buffer has been allocated yet, nullptr will be provided. * * If the memory cannot be allocated, nullptr should be returned. * |actual_size| will be ignored. It is assumed that |old_buffer| is still * valid in this case and has not been modified. * * The default implementation uses the stdlib's `realloc()` function. */ virtual void* ReallocateBufferMemory(void* old_buffer, size_t size, size_t* actual_size); /** * Frees a buffer allocated with |ReallocateBufferMemory|. * * The default implementation uses the stdlib's `free()` function. */ virtual void FreeBufferMemory(void* buffer); }; explicit ValueSerializer(Isolate* isolate); ValueSerializer(Isolate* isolate, Delegate* delegate); ~ValueSerializer(); /** * Writes out a header, which includes the format version. */ void WriteHeader(); /** * Serializes a JavaScript value into the buffer. */ V8_WARN_UNUSED_RESULT Maybe<bool> WriteValue(Local<Context> context, Local<Value> value); /** * Returns the stored data (allocated using the delegate's * ReallocateBufferMemory) and its size. This serializer should not be used * once the buffer is released. The contents are undefined if a previous write * has failed. Ownership of the buffer is transferred to the caller. */ V8_WARN_UNUSED_RESULT std::pair<uint8_t*, size_t> Release(); /** * Marks an ArrayBuffer as havings its contents transferred out of band. * Pass the corresponding ArrayBuffer in the deserializing context to * ValueDeserializer::TransferArrayBuffer. */ void TransferArrayBuffer(uint32_t transfer_id, Local<ArrayBuffer> array_buffer); /** * Indicate whether to treat ArrayBufferView objects as host objects, * i.e. pass them to Delegate::WriteHostObject. This should not be * called when no Delegate was passed. * * The default is not to treat ArrayBufferViews as host objects. */ void SetTreatArrayBufferViewsAsHostObjects(bool mode); /** * Write raw data in various common formats to the buffer. * Note that integer types are written in base-128 varint format, not with a * binary copy. For use during an override of Delegate::WriteHostObject. */ void WriteUint32(uint32_t value); void WriteUint64(uint64_t value); void WriteDouble(double value); void WriteRawBytes(const void* source, size_t length); ValueSerializer(const ValueSerializer&) = delete; void operator=(const ValueSerializer&) = delete; private: struct PrivateData; PrivateData* private_; }; /** * Deserializes values from data written with ValueSerializer, or a compatible * implementation. */ class V8_EXPORT ValueDeserializer { public: class V8_EXPORT Delegate { public: virtual ~Delegate() = default; /** * The embedder overrides this method to read some kind of host object, if * possible. If not, a suitable exception should be thrown and * MaybeLocal<Object>() returned. */ virtual MaybeLocal<Object> ReadHostObject(Isolate* isolate); /** * Get a WasmModuleObject given a transfer_id previously provided * by ValueSerializer::GetWasmModuleTransferId */ virtual MaybeLocal<WasmModuleObject> GetWasmModuleFromId( Isolate* isolate, uint32_t transfer_id); /** * Get a SharedArrayBuffer given a clone_id previously provided * by ValueSerializer::GetSharedArrayBufferId */ virtual MaybeLocal<SharedArrayBuffer> GetSharedArrayBufferFromId( Isolate* isolate, uint32_t clone_id); }; ValueDeserializer(Isolate* isolate, const uint8_t* data, size_t size); ValueDeserializer(Isolate* isolate, const uint8_t* data, size_t size, Delegate* delegate); ~ValueDeserializer(); /** * Reads and validates a header (including the format version). * May, for example, reject an invalid or unsupported wire format. */ V8_WARN_UNUSED_RESULT Maybe<bool> ReadHeader(Local<Context> context); /** * Deserializes a JavaScript value from the buffer. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> ReadValue(Local<Context> context); /** * Accepts the array buffer corresponding to the one passed previously to * ValueSerializer::TransferArrayBuffer. */ void TransferArrayBuffer(uint32_t transfer_id, Local<ArrayBuffer> array_buffer); /** * Similar to TransferArrayBuffer, but for SharedArrayBuffer. * The id is not necessarily in the same namespace as unshared ArrayBuffer * objects. */ void TransferSharedArrayBuffer(uint32_t id, Local<SharedArrayBuffer> shared_array_buffer); /** * Must be called before ReadHeader to enable support for reading the legacy * wire format (i.e., which predates this being shipped). * * Don't use this unless you need to read data written by previous versions of * blink::ScriptValueSerializer. */ void SetSupportsLegacyWireFormat(bool supports_legacy_wire_format); /** * Reads the underlying wire format version. Likely mostly to be useful to * legacy code reading old wire format versions. Must be called after * ReadHeader. */ uint32_t GetWireFormatVersion() const; /** * Reads raw data in various common formats to the buffer. * Note that integer types are read in base-128 varint format, not with a * binary copy. For use during an override of Delegate::ReadHostObject. */ V8_WARN_UNUSED_RESULT bool ReadUint32(uint32_t* value); V8_WARN_UNUSED_RESULT bool ReadUint64(uint64_t* value); V8_WARN_UNUSED_RESULT bool ReadDouble(double* value); V8_WARN_UNUSED_RESULT bool ReadRawBytes(size_t length, const void** data); ValueDeserializer(const ValueDeserializer&) = delete; void operator=(const ValueDeserializer&) = delete; private: struct PrivateData; PrivateData* private_; }; // --- Value --- /** * The superclass of all JavaScript values and objects. */ class V8_EXPORT Value : public Data { public: /** * Returns true if this value is the undefined value. See ECMA-262 * 4.3.10. * * This is equivalent to `value === undefined` in JS. */ V8_INLINE bool IsUndefined() const; /** * Returns true if this value is the null value. See ECMA-262 * 4.3.11. * * This is equivalent to `value === null` in JS. */ V8_INLINE bool IsNull() const; /** * Returns true if this value is either the null or the undefined value. * See ECMA-262 * 4.3.11. and 4.3.12 * * This is equivalent to `value == null` in JS. */ V8_INLINE bool IsNullOrUndefined() const; /** * Returns true if this value is true. * * This is not the same as `BooleanValue()`. The latter performs a * conversion to boolean, i.e. the result of `Boolean(value)` in JS, whereas * this checks `value === true`. */ bool IsTrue() const; /** * Returns true if this value is false. * * This is not the same as `!BooleanValue()`. The latter performs a * conversion to boolean, i.e. the result of `!Boolean(value)` in JS, whereas * this checks `value === false`. */ bool IsFalse() const; /** * Returns true if this value is a symbol or a string. * * This is equivalent to * `typeof value === 'string' || typeof value === 'symbol'` in JS. */ bool IsName() const; /** * Returns true if this value is an instance of the String type. * See ECMA-262 8.4. * * This is equivalent to `typeof value === 'string'` in JS. */ V8_INLINE bool IsString() const; /** * Returns true if this value is a symbol. * * This is equivalent to `typeof value === 'symbol'` in JS. */ bool IsSymbol() const; /** * Returns true if this value is a function. * * This is equivalent to `typeof value === 'function'` in JS. */ bool IsFunction() const; /** * Returns true if this value is an array. Note that it will return false for * an Proxy for an array. */ bool IsArray() const; /** * Returns true if this value is an object. */ bool IsObject() const; /** * Returns true if this value is a bigint. * * This is equivalent to `typeof value === 'bigint'` in JS. */ bool IsBigInt() const; /** * Returns true if this value is boolean. * * This is equivalent to `typeof value === 'boolean'` in JS. */ bool IsBoolean() const; /** * Returns true if this value is a number. * * This is equivalent to `typeof value === 'number'` in JS. */ bool IsNumber() const; /** * Returns true if this value is an `External` object. */ bool IsExternal() const; /** * Returns true if this value is a 32-bit signed integer. */ bool IsInt32() const; /** * Returns true if this value is a 32-bit unsigned integer. */ bool IsUint32() const; /** * Returns true if this value is a Date. */ bool IsDate() const; /** * Returns true if this value is an Arguments object. */ bool IsArgumentsObject() const; /** * Returns true if this value is a BigInt object. */ bool IsBigIntObject() const; /** * Returns true if this value is a Boolean object. */ bool IsBooleanObject() const; /** * Returns true if this value is a Number object. */ bool IsNumberObject() const; /** * Returns true if this value is a String object. */ bool IsStringObject() const; /** * Returns true if this value is a Symbol object. */ bool IsSymbolObject() const; /** * Returns true if this value is a NativeError. */ bool IsNativeError() const; /** * Returns true if this value is a RegExp. */ bool IsRegExp() const; /** * Returns true if this value is an async function. */ bool IsAsyncFunction() const; /** * Returns true if this value is a Generator function. */ bool IsGeneratorFunction() const; /** * Returns true if this value is a Generator object (iterator). */ bool IsGeneratorObject() const; /** * Returns true if this value is a Promise. */ bool IsPromise() const; /** * Returns true if this value is a Map. */ bool IsMap() const; /** * Returns true if this value is a Set. */ bool IsSet() const; /** * Returns true if this value is a Map Iterator. */ bool IsMapIterator() const; /** * Returns true if this value is a Set Iterator. */ bool IsSetIterator() const; /** * Returns true if this value is a WeakMap. */ bool IsWeakMap() const; /** * Returns true if this value is a WeakSet. */ bool IsWeakSet() const; /** * Returns true if this value is an ArrayBuffer. */ bool IsArrayBuffer() const; /** * Returns true if this value is an ArrayBufferView. */ bool IsArrayBufferView() const; /** * Returns true if this value is one of TypedArrays. */ bool IsTypedArray() const; /** * Returns true if this value is an Uint8Array. */ bool IsUint8Array() const; /** * Returns true if this value is an Uint8ClampedArray. */ bool IsUint8ClampedArray() const; /** * Returns true if this value is an Int8Array. */ bool IsInt8Array() const; /** * Returns true if this value is an Uint16Array. */ bool IsUint16Array() const; /** * Returns true if this value is an Int16Array. */ bool IsInt16Array() const; /** * Returns true if this value is an Uint32Array. */ bool IsUint32Array() const; /** * Returns true if this value is an Int32Array. */ bool IsInt32Array() const; /** * Returns true if this value is a Float32Array. */ bool IsFloat32Array() const; /** * Returns true if this value is a Float64Array. */ bool IsFloat64Array() const; /** * Returns true if this value is a BigInt64Array. */ bool IsBigInt64Array() const; /** * Returns true if this value is a BigUint64Array. */ bool IsBigUint64Array() const; /** * Returns true if this value is a DataView. */ bool IsDataView() const; /** * Returns true if this value is a SharedArrayBuffer. */ bool IsSharedArrayBuffer() const; /** * Returns true if this value is a JavaScript Proxy. */ bool IsProxy() const; /** * Returns true if this value is a WasmModuleObject. */ bool IsWasmModuleObject() const; /** * Returns true if the value is a Module Namespace Object. */ bool IsModuleNamespaceObject() const; /** * Perform the equivalent of `BigInt(value)` in JS. */ V8_WARN_UNUSED_RESULT MaybeLocal<BigInt> ToBigInt( Local<Context> context) const; /** * Perform the equivalent of `Number(value)` in JS. */ V8_WARN_UNUSED_RESULT MaybeLocal<Number> ToNumber( Local<Context> context) const; /** * Perform the equivalent of `String(value)` in JS. */ V8_WARN_UNUSED_RESULT MaybeLocal<String> ToString( Local<Context> context) const; /** * Provide a string representation of this value usable for debugging. * This operation has no observable side effects and will succeed * unless e.g. execution is being terminated. */ V8_WARN_UNUSED_RESULT MaybeLocal<String> ToDetailString( Local<Context> context) const; /** * Perform the equivalent of `Object(value)` in JS. */ V8_WARN_UNUSED_RESULT MaybeLocal<Object> ToObject( Local<Context> context) const; /** * Perform the equivalent of `Number(value)` in JS and convert the result * to an integer. Negative values are rounded up, positive values are rounded * down. NaN is converted to 0. Infinite values yield undefined results. */ V8_WARN_UNUSED_RESULT MaybeLocal<Integer> ToInteger( Local<Context> context) const; /** * Perform the equivalent of `Number(value)` in JS and convert the result * to an unsigned 32-bit integer by performing the steps in * https://tc39.es/ecma262/#sec-touint32. */ V8_WARN_UNUSED_RESULT MaybeLocal<Uint32> ToUint32( Local<Context> context) const; /** * Perform the equivalent of `Number(value)` in JS and convert the result * to a signed 32-bit integer by performing the steps in * https://tc39.es/ecma262/#sec-toint32. */ V8_WARN_UNUSED_RESULT MaybeLocal<Int32> ToInt32(Local<Context> context) const; /** * Perform the equivalent of `Boolean(value)` in JS. This can never fail. */ Local<Boolean> ToBoolean(Isolate* isolate) const; /** * Attempts to convert a string to an array index. * Returns an empty handle if the conversion fails. */ V8_WARN_UNUSED_RESULT MaybeLocal<Uint32> ToArrayIndex( Local<Context> context) const; /** Returns the equivalent of `ToBoolean()->Value()`. */ bool BooleanValue(Isolate* isolate) const; /** Returns the equivalent of `ToNumber()->Value()`. */ V8_WARN_UNUSED_RESULT Maybe<double> NumberValue(Local<Context> context) const; /** Returns the equivalent of `ToInteger()->Value()`. */ V8_WARN_UNUSED_RESULT Maybe<int64_t> IntegerValue( Local<Context> context) const; /** Returns the equivalent of `ToUint32()->Value()`. */ V8_WARN_UNUSED_RESULT Maybe<uint32_t> Uint32Value( Local<Context> context) const; /** Returns the equivalent of `ToInt32()->Value()`. */ V8_WARN_UNUSED_RESULT Maybe<int32_t> Int32Value(Local<Context> context) const; /** JS == */ V8_WARN_UNUSED_RESULT Maybe<bool> Equals(Local<Context> context, Local<Value> that) const; bool StrictEquals(Local<Value> that) const; bool SameValue(Local<Value> that) const; template <class T> V8_INLINE static Value* Cast(T* value); Local<String> TypeOf(Isolate*); Maybe<bool> InstanceOf(Local<Context> context, Local<Object> object); private: V8_INLINE bool QuickIsUndefined() const; V8_INLINE bool QuickIsNull() const; V8_INLINE bool QuickIsNullOrUndefined() const; V8_INLINE bool QuickIsString() const; bool FullIsUndefined() const; bool FullIsNull() const; bool FullIsString() const; }; /** * The superclass of primitive values. See ECMA-262 4.3.2. */ class V8_EXPORT Primitive : public Value { }; /** * A primitive boolean value (ECMA-262, 4.3.14). Either the true * or false value. */ class V8_EXPORT Boolean : public Primitive { public: bool Value() const; V8_INLINE static Boolean* Cast(v8::Value* obj); V8_INLINE static Local<Boolean> New(Isolate* isolate, bool value); private: static void CheckCast(v8::Value* obj); }; /** * A superclass for symbols and strings. */ class V8_EXPORT Name : public Primitive { public: /** * Returns the identity hash for this object. The current implementation * uses an inline property on the object to store the identity hash. * * The return value will never be 0. Also, it is not guaranteed to be * unique. */ int GetIdentityHash(); V8_INLINE static Name* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A flag describing different modes of string creation. * * Aside from performance implications there are no differences between the two * creation modes. */ enum class NewStringType { /** * Create a new string, always allocating new storage memory. */ kNormal, /** * Acts as a hint that the string should be created in the * old generation heap space and be deduplicated if an identical string * already exists. */ kInternalized }; /** * A JavaScript string value (ECMA-262, 4.3.17). */ class V8_EXPORT String : public Name { public: static constexpr int kMaxLength = internal::kApiSystemPointerSize == 4 ? (1 << 28) - 16 : (1 << 29) - 24; enum Encoding { UNKNOWN_ENCODING = 0x1, TWO_BYTE_ENCODING = 0x0, ONE_BYTE_ENCODING = 0x8 }; /** * Returns the number of characters (UTF-16 code units) in this string. */ int Length() const; /** * Returns the number of bytes in the UTF-8 encoded * representation of this string. */ int Utf8Length(Isolate* isolate) const; /** * Returns whether this string is known to contain only one byte data, * i.e. ISO-8859-1 code points. * Does not read the string. * False negatives are possible. */ bool IsOneByte() const; /** * Returns whether this string contain only one byte data, * i.e. ISO-8859-1 code points. * Will read the entire string in some cases. */ bool ContainsOnlyOneByte() const; /** * Write the contents of the string to an external buffer. * If no arguments are given, expects the buffer to be large * enough to hold the entire string and NULL terminator. Copies * the contents of the string and the NULL terminator into the * buffer. * * WriteUtf8 will not write partial UTF-8 sequences, preferring to stop * before the end of the buffer. * * Copies up to length characters into the output buffer. * Only null-terminates if there is enough space in the buffer. * * \param buffer The buffer into which the string will be copied. * \param start The starting position within the string at which * copying begins. * \param length The number of characters to copy from the string. For * WriteUtf8 the number of bytes in the buffer. * \param nchars_ref The number of characters written, can be NULL. * \param options Various options that might affect performance of this or * subsequent operations. * \return The number of characters copied to the buffer excluding the null * terminator. For WriteUtf8: The number of bytes copied to the buffer * including the null terminator (if written). */ enum WriteOptions { NO_OPTIONS = 0, HINT_MANY_WRITES_EXPECTED = 1, NO_NULL_TERMINATION = 2, PRESERVE_ONE_BYTE_NULL = 4, // Used by WriteUtf8 to replace orphan surrogate code units with the // unicode replacement character. Needs to be set to guarantee valid UTF-8 // output. REPLACE_INVALID_UTF8 = 8 }; // 16-bit character codes. int Write(Isolate* isolate, uint16_t* buffer, int start = 0, int length = -1, int options = NO_OPTIONS) const; // One byte characters. int WriteOneByte(Isolate* isolate, uint8_t* buffer, int start = 0, int length = -1, int options = NO_OPTIONS) const; // UTF-8 encoded characters. int WriteUtf8(Isolate* isolate, char* buffer, int length = -1, int* nchars_ref = nullptr, int options = NO_OPTIONS) const; /** * A zero length string. */ V8_INLINE static Local<String> Empty(Isolate* isolate); /** * Returns true if the string is external */ bool IsExternal() const; /** * Returns true if the string is both external and one-byte. */ bool IsExternalOneByte() const; class V8_EXPORT ExternalStringResourceBase { // NOLINT public: virtual ~ExternalStringResourceBase() = default; /** * If a string is cacheable, the value returned by * ExternalStringResource::data() may be cached, otherwise it is not * expected to be stable beyond the current top-level task. */ virtual bool IsCacheable() const { return true; } // Disallow copying and assigning. ExternalStringResourceBase(const ExternalStringResourceBase&) = delete; void operator=(const ExternalStringResourceBase&) = delete; protected: ExternalStringResourceBase() = default; /** * Internally V8 will call this Dispose method when the external string * resource is no longer needed. The default implementation will use the * delete operator. This method can be overridden in subclasses to * control how allocated external string resources are disposed. */ virtual void Dispose() { delete this; } /** * For a non-cacheable string, the value returned by * |ExternalStringResource::data()| has to be stable between |Lock()| and * |Unlock()|, that is the string must behave as is |IsCacheable()| returned * true. * * These two functions must be thread-safe, and can be called from anywhere. * They also must handle lock depth, in the sense that each can be called * several times, from different threads, and unlocking should only happen * when the balance of Lock() and Unlock() calls is 0. */ virtual void Lock() const {} /** * Unlocks the string. */ virtual void Unlock() const {} private: friend class internal::ExternalString; friend class v8::String; friend class internal::ScopedExternalStringLock; }; /** * An ExternalStringResource is a wrapper around a two-byte string * buffer that resides outside V8's heap. Implement an * ExternalStringResource to manage the life cycle of the underlying * buffer. Note that the string data must be immutable. */ class V8_EXPORT ExternalStringResource  : public ExternalStringResourceBase { public: /** * Override the destructor to manage the life cycle of the underlying * buffer. */ ~ExternalStringResource() override = default; /** * The string data from the underlying buffer. */ virtual const uint16_t* data() const = 0; /** * The length of the string. That is, the number of two-byte characters. */ virtual size_t length() const = 0; protected: ExternalStringResource() = default; }; /** * An ExternalOneByteStringResource is a wrapper around an one-byte * string buffer that resides outside V8's heap. Implement an * ExternalOneByteStringResource to manage the life cycle of the * underlying buffer. Note that the string data must be immutable * and that the data must be Latin-1 and not UTF-8, which would require * special treatment internally in the engine and do not allow efficient * indexing. Use String::New or convert to 16 bit data for non-Latin1. */ class V8_EXPORT ExternalOneByteStringResource  : public ExternalStringResourceBase { public: /** * Override the destructor to manage the life cycle of the underlying * buffer. */ ~ExternalOneByteStringResource() override = default; /** The string data from the underlying buffer.*/ virtual const char* data() const = 0; /** The number of Latin-1 characters in the string.*/ virtual size_t length() const = 0; protected: ExternalOneByteStringResource() = default; }; /** * If the string is an external string, return the ExternalStringResourceBase * regardless of the encoding, otherwise return NULL. The encoding of the * string is returned in encoding_out. */ V8_INLINE ExternalStringResourceBase* GetExternalStringResourceBase( Encoding* encoding_out) const; /** * Get the ExternalStringResource for an external string. Returns * NULL if IsExternal() doesn't return true. */ V8_INLINE ExternalStringResource* GetExternalStringResource() const; /** * Get the ExternalOneByteStringResource for an external one-byte string. * Returns NULL if IsExternalOneByte() doesn't return true. */ const ExternalOneByteStringResource* GetExternalOneByteStringResource() const; V8_INLINE static String* Cast(v8::Value* obj); /** * Allocates a new string from a UTF-8 literal. This is equivalent to calling * String::NewFromUtf(isolate, "...").ToLocalChecked(), but without the check * overhead. * * When called on a string literal containing '\0', the inferred length is the * length of the input array minus 1 (for the final '\0') and not the value * returned by strlen. **/ template <int N> static V8_WARN_UNUSED_RESULT Local<String> NewFromUtf8Literal( Isolate* isolate, const char (&literal)[N], NewStringType type = NewStringType::kNormal) { static_assert(N <= kMaxLength, "String is too long"); return NewFromUtf8Literal(isolate, literal, type, N - 1); } /** Allocates a new string from UTF-8 data. Only returns an empty value when * length > kMaxLength. **/ static V8_WARN_UNUSED_RESULT MaybeLocal<String> NewFromUtf8( Isolate* isolate, const char* data, NewStringType type = NewStringType::kNormal, int length = -1); /** Allocates a new string from Latin-1 data. Only returns an empty value * when length > kMaxLength. **/ static V8_WARN_UNUSED_RESULT MaybeLocal<String> NewFromOneByte( Isolate* isolate, const uint8_t* data, NewStringType type = NewStringType::kNormal, int length = -1); /** Allocates a new string from UTF-16 data. Only returns an empty value when * length > kMaxLength. **/ static V8_WARN_UNUSED_RESULT MaybeLocal<String> NewFromTwoByte( Isolate* isolate, const uint16_t* data, NewStringType type = NewStringType::kNormal, int length = -1); /** * Creates a new string by concatenating the left and the right strings * passed in as parameters. */ static Local<String> Concat(Isolate* isolate, Local<String> left, Local<String> right); /** * Creates a new external string using the data defined in the given * resource. When the external string is no longer live on V8's heap the * resource will be disposed by calling its Dispose method. The caller of * this function should not otherwise delete or modify the resource. Neither * should the underlying buffer be deallocated or modified except through the * destructor of the external string resource. */ static V8_WARN_UNUSED_RESULT MaybeLocal<String> NewExternalTwoByte( Isolate* isolate, ExternalStringResource* resource); /** * Associate an external string resource with this string by transforming it * in place so that existing references to this string in the JavaScript heap * will use the external string resource. The external string resource's * character contents need to be equivalent to this string. * Returns true if the string has been changed to be an external string. * The string is not modified if the operation fails. See NewExternal for * information on the lifetime of the resource. */ bool MakeExternal(ExternalStringResource* resource); /** * Creates a new external string using the one-byte data defined in the given * resource. When the external string is no longer live on V8's heap the * resource will be disposed by calling its Dispose method. The caller of * this function should not otherwise delete or modify the resource. Neither * should the underlying buffer be deallocated or modified except through the * destructor of the external string resource. */ static V8_WARN_UNUSED_RESULT MaybeLocal<String> NewExternalOneByte( Isolate* isolate, ExternalOneByteStringResource* resource); /** * Associate an external string resource with this string by transforming it * in place so that existing references to this string in the JavaScript heap * will use the external string resource. The external string resource's * character contents need to be equivalent to this string. * Returns true if the string has been changed to be an external string. * The string is not modified if the operation fails. See NewExternal for * information on the lifetime of the resource. */ bool MakeExternal(ExternalOneByteStringResource* resource); /** * Returns true if this string can be made external. */ bool CanMakeExternal(); /** * Returns true if the strings values are equal. Same as JS ==/===. */ bool StringEquals(Local<String> str); /** * Converts an object to a UTF-8-encoded character array. Useful if * you want to print the object. If conversion to a string fails * (e.g. due to an exception in the toString() method of the object) * then the length() method returns 0 and the * operator returns * NULL. */ class V8_EXPORT Utf8Value { public: Utf8Value(Isolate* isolate, Local<v8::Value> obj); ~Utf8Value(); char* operator*() { return str_; } const char* operator*() const { return str_; } int length() const { return length_; } // Disallow copying and assigning. Utf8Value(const Utf8Value&) = delete; void operator=(const Utf8Value&) = delete; private: char* str_; int length_; }; /** * Converts an object to a two-byte (UTF-16-encoded) string. * If conversion to a string fails (eg. due to an exception in the toString() * method of the object) then the length() method returns 0 and the * operator * returns NULL. */ class V8_EXPORT Value { public: Value(Isolate* isolate, Local<v8::Value> obj); ~Value(); uint16_t* operator*() { return str_; } const uint16_t* operator*() const { return str_; } int length() const { return length_; } // Disallow copying and assigning. Value(const Value&) = delete; void operator=(const Value&) = delete; private: uint16_t* str_; int length_; }; private: void VerifyExternalStringResourceBase(ExternalStringResourceBase* v, Encoding encoding) const; void VerifyExternalStringResource(ExternalStringResource* val) const; ExternalStringResource* GetExternalStringResourceSlow() const; ExternalStringResourceBase* GetExternalStringResourceBaseSlow( String::Encoding* encoding_out) const; static Local<v8::String> NewFromUtf8Literal(Isolate* isolate, const char* literal, NewStringType type, int length); static void CheckCast(v8::Value* obj); }; // Zero-length string specialization (templated string size includes // terminator). template <> inline V8_WARN_UNUSED_RESULT Local<String> String::NewFromUtf8Literal( Isolate* isolate, const char (&literal)[1], NewStringType type) { return String::Empty(isolate); } /** * A JavaScript symbol (ECMA-262 edition 6) */ class V8_EXPORT Symbol : public Name { public: /** * Returns the description string of the symbol, or undefined if none. */ Local<Value> Description() const; V8_DEPRECATE_SOON("Use Symbol::Description()") Local<Value> Name() const { return Description(); } /** * Create a symbol. If description is not empty, it will be used as the * description. */ static Local<Symbol> New(Isolate* isolate, Local<String> description = Local<String>()); /** * Access global symbol registry. * Note that symbols created this way are never collected, so * they should only be used for statically fixed properties. * Also, there is only one global name space for the descriptions used as * keys. * To minimize the potential for clashes, use qualified names as keys. */ static Local<Symbol> For(Isolate* isolate, Local<String> description); /** * Retrieve a global symbol. Similar to |For|, but using a separate * registry that is not accessible by (and cannot clash with) JavaScript code. */ static Local<Symbol> ForApi(Isolate* isolate, Local<String> description); // Well-known symbols static Local<Symbol> GetAsyncIterator(Isolate* isolate); static Local<Symbol> GetHasInstance(Isolate* isolate); static Local<Symbol> GetIsConcatSpreadable(Isolate* isolate); static Local<Symbol> GetIterator(Isolate* isolate); static Local<Symbol> GetMatch(Isolate* isolate); static Local<Symbol> GetReplace(Isolate* isolate); static Local<Symbol> GetSearch(Isolate* isolate); static Local<Symbol> GetSplit(Isolate* isolate); static Local<Symbol> GetToPrimitive(Isolate* isolate); static Local<Symbol> GetToStringTag(Isolate* isolate); static Local<Symbol> GetUnscopables(Isolate* isolate); V8_INLINE static Symbol* Cast(Value* obj); private: Symbol(); static void CheckCast(Value* obj); }; /** * A private symbol * * This is an experimental feature. Use at your own risk. */ class V8_EXPORT Private : public Data { public: /** * Returns the print name string of the private symbol, or undefined if none. */ Local<Value> Name() const; /** * Create a private symbol. If name is not empty, it will be the description. */ static Local<Private> New(Isolate* isolate, Local<String> name = Local<String>()); /** * Retrieve a global private symbol. If a symbol with this name has not * been retrieved in the same isolate before, it is created. * Note that private symbols created this way are never collected, so * they should only be used for statically fixed properties. * Also, there is only one global name space for the names used as keys. * To minimize the potential for clashes, use qualified names as keys, * e.g., "Class#property". */ static Local<Private> ForApi(Isolate* isolate, Local<String> name); V8_INLINE static Private* Cast(Data* data); private: Private(); static void CheckCast(Data* that); }; /** * A JavaScript number value (ECMA-262, 4.3.20) */ class V8_EXPORT Number : public Primitive { public: double Value() const; static Local<Number> New(Isolate* isolate, double value); V8_INLINE static Number* Cast(v8::Value* obj); private: Number(); static void CheckCast(v8::Value* obj); }; /** * A JavaScript value representing a signed integer. */ class V8_EXPORT Integer : public Number { public: static Local<Integer> New(Isolate* isolate, int32_t value); static Local<Integer> NewFromUnsigned(Isolate* isolate, uint32_t value); int64_t Value() const; V8_INLINE static Integer* Cast(v8::Value* obj); private: Integer(); static void CheckCast(v8::Value* obj); }; /** * A JavaScript value representing a 32-bit signed integer. */ class V8_EXPORT Int32 : public Integer { public: int32_t Value() const; V8_INLINE static Int32* Cast(v8::Value* obj); private: Int32(); static void CheckCast(v8::Value* obj); }; /** * A JavaScript value representing a 32-bit unsigned integer. */ class V8_EXPORT Uint32 : public Integer { public: uint32_t Value() const; V8_INLINE static Uint32* Cast(v8::Value* obj); private: Uint32(); static void CheckCast(v8::Value* obj); }; /** * A JavaScript BigInt value (https://tc39.github.io/proposal-bigint) */ class V8_EXPORT BigInt : public Primitive { public: static Local<BigInt> New(Isolate* isolate, int64_t value); static Local<BigInt> NewFromUnsigned(Isolate* isolate, uint64_t value); /** * Creates a new BigInt object using a specified sign bit and a * specified list of digits/words. * The resulting number is calculated as: * * (-1)^sign_bit * (words[0] * (2^64)^0 + words[1] * (2^64)^1 + ...) */ static MaybeLocal<BigInt> NewFromWords(Local<Context> context, int sign_bit, int word_count, const uint64_t* words); /** * Returns the value of this BigInt as an unsigned 64-bit integer. * If `lossless` is provided, it will reflect whether the return value was * truncated or wrapped around. In particular, it is set to `false` if this * BigInt is negative. */ uint64_t Uint64Value(bool* lossless = nullptr) const; /** * Returns the value of this BigInt as a signed 64-bit integer. * If `lossless` is provided, it will reflect whether this BigInt was * truncated or not. */ int64_t Int64Value(bool* lossless = nullptr) const; /** * Returns the number of 64-bit words needed to store the result of * ToWordsArray(). */ int WordCount() const; /** * Writes the contents of this BigInt to a specified memory location. * `sign_bit` must be provided and will be set to 1 if this BigInt is * negative. * `*word_count` has to be initialized to the length of the `words` array. * Upon return, it will be set to the actual number of words that would * be needed to store this BigInt (i.e. the return value of `WordCount()`). */ void ToWordsArray(int* sign_bit, int* word_count, uint64_t* words) const; V8_INLINE static BigInt* Cast(v8::Value* obj); private: BigInt(); static void CheckCast(v8::Value* obj); }; /** * PropertyAttribute. */ enum PropertyAttribute { /** None. **/ None = 0, /** ReadOnly, i.e., not writable. **/ ReadOnly = 1 << 0, /** DontEnum, i.e., not enumerable. **/ DontEnum = 1 << 1, /** DontDelete, i.e., not configurable. **/ DontDelete = 1 << 2 }; /** * Accessor[Getter|Setter] are used as callback functions when * setting|getting a particular property. See Object and ObjectTemplate's * method SetAccessor. */ typedef void (*AccessorGetterCallback)( Local<String> property, const PropertyCallbackInfo<Value>& info); typedef void (*AccessorNameGetterCallback)( Local<Name> property, const PropertyCallbackInfo<Value>& info); typedef void (*AccessorSetterCallback)( Local<String> property, Local<Value> value, const PropertyCallbackInfo<void>& info); typedef void (*AccessorNameSetterCallback)( Local<Name> property, Local<Value> value, const PropertyCallbackInfo<void>& info); /** * Access control specifications. * * Some accessors should be accessible across contexts. These * accessors have an explicit access control parameter which specifies * the kind of cross-context access that should be allowed. * * TODO(dcarney): Remove PROHIBITS_OVERWRITING as it is now unused. */ enum AccessControl { DEFAULT = 0, ALL_CAN_READ = 1, ALL_CAN_WRITE = 1 << 1, PROHIBITS_OVERWRITING = 1 << 2 }; /** * Property filter bits. They can be or'ed to build a composite filter. */ enum PropertyFilter { ALL_PROPERTIES = 0, ONLY_WRITABLE = 1, ONLY_ENUMERABLE = 2, ONLY_CONFIGURABLE = 4, SKIP_STRINGS = 8, SKIP_SYMBOLS = 16 }; /** * Options for marking whether callbacks may trigger JS-observable side effects. * Side-effect-free callbacks are whitelisted during debug evaluation with * throwOnSideEffect. It applies when calling a Function, FunctionTemplate, * or an Accessor callback. For Interceptors, please see * PropertyHandlerFlags's kHasNoSideEffect. * Callbacks that only cause side effects to the receiver are whitelisted if * invoked on receiver objects that are created within the same debug-evaluate * call, as these objects are temporary and the side effect does not escape. */ enum class SideEffectType { kHasSideEffect, kHasNoSideEffect, kHasSideEffectToReceiver }; /** * Keys/Properties filter enums: * * KeyCollectionMode limits the range of collected properties. kOwnOnly limits * the collected properties to the given Object only. kIncludesPrototypes will * include all keys of the objects's prototype chain as well. */ enum class KeyCollectionMode { kOwnOnly, kIncludePrototypes }; /** * kIncludesIndices allows for integer indices to be collected, while * kSkipIndices will exclude integer indices from being collected. */ enum class IndexFilter { kIncludeIndices, kSkipIndices }; /** * kConvertToString will convert integer indices to strings. * kKeepNumbers will return numbers for integer indices. */ enum class KeyConversionMode { kConvertToString, kKeepNumbers, kNoNumbers }; /** * Integrity level for objects. */ enum class IntegrityLevel { kFrozen, kSealed }; /** * A JavaScript object (ECMA-262, 4.3.3) */ class V8_EXPORT Object : public Value { public: /** * Set only return Just(true) or Empty(), so if it should never fail, use * result.Check(). */ V8_WARN_UNUSED_RESULT Maybe<bool> Set(Local<Context> context, Local<Value> key, Local<Value> value); V8_WARN_UNUSED_RESULT Maybe<bool> Set(Local<Context> context, uint32_t index, Local<Value> value); // Implements CreateDataProperty (ECMA-262, 7.3.4). // // Defines a configurable, writable, enumerable property with the given value // on the object unless the property already exists and is not configurable // or the object is not extensible. // // Returns true on success. V8_WARN_UNUSED_RESULT Maybe<bool> CreateDataProperty(Local<Context> context, Local<Name> key, Local<Value> value); V8_WARN_UNUSED_RESULT Maybe<bool> CreateDataProperty(Local<Context> context, uint32_t index, Local<Value> value); // Implements DefineOwnProperty. // // In general, CreateDataProperty will be faster, however, does not allow // for specifying attributes. // // Returns true on success. V8_WARN_UNUSED_RESULT Maybe<bool> DefineOwnProperty( Local<Context> context, Local<Name> key, Local<Value> value, PropertyAttribute attributes = None); // Implements Object.DefineProperty(O, P, Attributes), see Ecma-262 19.1.2.4. // // The defineProperty function is used to add an own property or // update the attributes of an existing own property of an object. // // Both data and accessor descriptors can be used. // // In general, CreateDataProperty is faster, however, does not allow // for specifying attributes or an accessor descriptor. // // The PropertyDescriptor can change when redefining a property. // // Returns true on success. V8_WARN_UNUSED_RESULT Maybe<bool> DefineProperty( Local<Context> context, Local<Name> key, PropertyDescriptor& descriptor); // NOLINT(runtime/references) V8_WARN_UNUSED_RESULT MaybeLocal<Value> Get(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT MaybeLocal<Value> Get(Local<Context> context, uint32_t index); /** * Gets the property attributes of a property which can be None or * any combination of ReadOnly, DontEnum and DontDelete. Returns * None when the property doesn't exist. */ V8_WARN_UNUSED_RESULT Maybe<PropertyAttribute> GetPropertyAttributes( Local<Context> context, Local<Value> key); /** * Returns Object.getOwnPropertyDescriptor as per ES2016 section 19.1.2.6. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> GetOwnPropertyDescriptor( Local<Context> context, Local<Name> key); /** * Object::Has() calls the abstract operation HasProperty(O, P) described * in ECMA-262, 7.3.10. Has() returns * true, if the object has the property, either own or on the prototype chain. * Interceptors, i.e., PropertyQueryCallbacks, are called if present. * * Has() has the same side effects as JavaScript's `variable in object`. * For example, calling Has() on a revoked proxy will throw an exception. * * \note Has() converts the key to a name, which possibly calls back into * JavaScript. * * See also v8::Object::HasOwnProperty() and * v8::Object::HasRealNamedProperty(). */ V8_WARN_UNUSED_RESULT Maybe<bool> Has(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT Maybe<bool> Delete(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT Maybe<bool> Has(Local<Context> context, uint32_t index); V8_WARN_UNUSED_RESULT Maybe<bool> Delete(Local<Context> context, uint32_t index); /** * Note: SideEffectType affects the getter only, not the setter. */ V8_WARN_UNUSED_RESULT Maybe<bool> SetAccessor( Local<Context> context, Local<Name> name, AccessorNameGetterCallback getter, AccessorNameSetterCallback setter = nullptr, MaybeLocal<Value> data = MaybeLocal<Value>(), AccessControl settings = DEFAULT, PropertyAttribute attribute = None, SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); void SetAccessorProperty(Local<Name> name, Local<Function> getter, Local<Function> setter = Local<Function>(), PropertyAttribute attribute = None, AccessControl settings = DEFAULT); /** * Sets a native data property like Template::SetNativeDataProperty, but * this method sets on this object directly. */ V8_WARN_UNUSED_RESULT Maybe<bool> SetNativeDataProperty( Local<Context> context, Local<Name> name, AccessorNameGetterCallback getter, AccessorNameSetterCallback setter = nullptr, Local<Value> data = Local<Value>(), PropertyAttribute attributes = None, SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); /** * Attempts to create a property with the given name which behaves like a data * property, except that the provided getter is invoked (and provided with the * data value) to supply its value the first time it is read. After the * property is accessed once, it is replaced with an ordinary data property. * * Analogous to Template::SetLazyDataProperty. */ V8_WARN_UNUSED_RESULT Maybe<bool> SetLazyDataProperty( Local<Context> context, Local<Name> name, AccessorNameGetterCallback getter, Local<Value> data = Local<Value>(), PropertyAttribute attributes = None, SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); /** * Functionality for private properties. * This is an experimental feature, use at your own risk. * Note: Private properties are not inherited. Do not rely on this, since it * may change. */ Maybe<bool> HasPrivate(Local<Context> context, Local<Private> key); Maybe<bool> SetPrivate(Local<Context> context, Local<Private> key, Local<Value> value); Maybe<bool> DeletePrivate(Local<Context> context, Local<Private> key); MaybeLocal<Value> GetPrivate(Local<Context> context, Local<Private> key); /** * Returns an array containing the names of the enumerable properties * of this object, including properties from prototype objects. The * array returned by this method contains the same values as would * be enumerated by a for-in statement over this object. */ V8_WARN_UNUSED_RESULT MaybeLocal<Array> GetPropertyNames( Local<Context> context); V8_WARN_UNUSED_RESULT MaybeLocal<Array> GetPropertyNames( Local<Context> context, KeyCollectionMode mode, PropertyFilter property_filter, IndexFilter index_filter, KeyConversionMode key_conversion = KeyConversionMode::kKeepNumbers); /** * This function has the same functionality as GetPropertyNames but * the returned array doesn't contain the names of properties from * prototype objects. */ V8_WARN_UNUSED_RESULT MaybeLocal<Array> GetOwnPropertyNames( Local<Context> context); /** * Returns an array containing the names of the filtered properties * of this object, including properties from prototype objects. The * array returned by this method contains the same values as would * be enumerated by a for-in statement over this object. */ V8_WARN_UNUSED_RESULT MaybeLocal<Array> GetOwnPropertyNames( Local<Context> context, PropertyFilter filter, KeyConversionMode key_conversion = KeyConversionMode::kKeepNumbers); /** * Get the prototype object. This does not skip objects marked to * be skipped by __proto__ and it does not consult the security * handler. */ Local<Value> GetPrototype(); /** * Set the prototype object. This does not skip objects marked to * be skipped by __proto__ and it does not consult the security * handler. */ V8_WARN_UNUSED_RESULT Maybe<bool> SetPrototype(Local<Context> context, Local<Value> prototype); /** * Finds an instance of the given function template in the prototype * chain. */ Local<Object> FindInstanceInPrototypeChain(Local<FunctionTemplate> tmpl); /** * Call builtin Object.prototype.toString on this object. * This is different from Value::ToString() that may call * user-defined toString function. This one does not. */ V8_WARN_UNUSED_RESULT MaybeLocal<String> ObjectProtoToString( Local<Context> context); /** * Returns the name of the function invoked as a constructor for this object. */ Local<String> GetConstructorName(); /** * Sets the integrity level of the object. */ Maybe<bool> SetIntegrityLevel(Local<Context> context, IntegrityLevel level); /** Gets the number of internal fields for this Object. */ int InternalFieldCount(); /** Same as above, but works for PersistentBase. */ V8_INLINE static int InternalFieldCount( const PersistentBase<Object>& object) { return object.val_->InternalFieldCount(); } /** Same as above, but works for TracedReferenceBase. */ V8_INLINE static int InternalFieldCount( const TracedReferenceBase<Object>& object) { return object.val_->InternalFieldCount(); } /** Gets the value from an internal field. */ V8_INLINE Local<Value> GetInternalField(int index); /** Sets the value in an internal field. */ void SetInternalField(int index, Local<Value> value); /** * Gets a 2-byte-aligned native pointer from an internal field. This field * must have been set by SetAlignedPointerInInternalField, everything else * leads to undefined behavior. */ V8_INLINE void* GetAlignedPointerFromInternalField(int index); /** Same as above, but works for PersistentBase. */ V8_INLINE static void* GetAlignedPointerFromInternalField( const PersistentBase<Object>& object, int index) { return object.val_->GetAlignedPointerFromInternalField(index); } /** Same as above, but works for TracedGlobal. */ V8_INLINE static void* GetAlignedPointerFromInternalField( const TracedReferenceBase<Object>& object, int index) { return object.val_->GetAlignedPointerFromInternalField(index); } /** * Sets a 2-byte-aligned native pointer in an internal field. To retrieve such * a field, GetAlignedPointerFromInternalField must be used, everything else * leads to undefined behavior. */ void SetAlignedPointerInInternalField(int index, void* value); void SetAlignedPointerInInternalFields(int argc, int indices[], void* values[]); /** * HasOwnProperty() is like JavaScript's Object.prototype.hasOwnProperty(). * * See also v8::Object::Has() and v8::Object::HasRealNamedProperty(). */ V8_WARN_UNUSED_RESULT Maybe<bool> HasOwnProperty(Local<Context> context, Local<Name> key); V8_WARN_UNUSED_RESULT Maybe<bool> HasOwnProperty(Local<Context> context, uint32_t index); /** * Use HasRealNamedProperty() if you want to check if an object has an own * property without causing side effects, i.e., without calling interceptors. * * This function is similar to v8::Object::HasOwnProperty(), but it does not * call interceptors. * * \note Consider using non-masking interceptors, i.e., the interceptors are * not called if the receiver has the real named property. See * `v8::PropertyHandlerFlags::kNonMasking`. * * See also v8::Object::Has(). */ V8_WARN_UNUSED_RESULT Maybe<bool> HasRealNamedProperty(Local<Context> context, Local<Name> key); V8_WARN_UNUSED_RESULT Maybe<bool> HasRealIndexedProperty( Local<Context> context, uint32_t index); V8_WARN_UNUSED_RESULT Maybe<bool> HasRealNamedCallbackProperty( Local<Context> context, Local<Name> key); /** * If result.IsEmpty() no real property was located in the prototype chain. * This means interceptors in the prototype chain are not called. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> GetRealNamedPropertyInPrototypeChain( Local<Context> context, Local<Name> key); /** * Gets the property attributes of a real property in the prototype chain, * which can be None or any combination of ReadOnly, DontEnum and DontDelete. * Interceptors in the prototype chain are not called. */ V8_WARN_UNUSED_RESULT Maybe<PropertyAttribute> GetRealNamedPropertyAttributesInPrototypeChain(Local<Context> context, Local<Name> key); /** * If result.IsEmpty() no real property was located on the object or * in the prototype chain. * This means interceptors in the prototype chain are not called. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> GetRealNamedProperty( Local<Context> context, Local<Name> key); /** * Gets the property attributes of a real property which can be * None or any combination of ReadOnly, DontEnum and DontDelete. * Interceptors in the prototype chain are not called. */ V8_WARN_UNUSED_RESULT Maybe<PropertyAttribute> GetRealNamedPropertyAttributes( Local<Context> context, Local<Name> key); /** Tests for a named lookup interceptor.*/ bool HasNamedLookupInterceptor(); /** Tests for an index lookup interceptor.*/ bool HasIndexedLookupInterceptor(); /** * Returns the identity hash for this object. The current implementation * uses a hidden property on the object to store the identity hash. * * The return value will never be 0. Also, it is not guaranteed to be * unique. */ int GetIdentityHash(); /** * Clone this object with a fast but shallow copy. Values will point * to the same values as the original object. */ // TODO(dcarney): take an isolate and optionally bail out? Local<Object> Clone(); /** * Returns the context in which the object was created. */ Local<Context> CreationContext(); /** Same as above, but works for Persistents */ V8_INLINE static Local<Context> CreationContext( const PersistentBase<Object>& object) { return object.val_->CreationContext(); } /** * Checks whether a callback is set by the * ObjectTemplate::SetCallAsFunctionHandler method. * When an Object is callable this method returns true. */ bool IsCallable(); /** * True if this object is a constructor. */ bool IsConstructor(); /** * True if this object can carry information relevant to the embedder in its * embedder fields, false otherwise. This is generally true for objects * constructed through function templates but also holds for other types where * V8 automatically adds internal fields at compile time, such as e.g. * v8::ArrayBuffer. */ bool IsApiWrapper(); /** * True if this object was created from an object template which was marked * as undetectable. See v8::ObjectTemplate::MarkAsUndetectable for more * information. */ bool IsUndetectable(); /** * Call an Object as a function if a callback is set by the * ObjectTemplate::SetCallAsFunctionHandler method. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> CallAsFunction(Local<Context> context, Local<Value> recv, int argc, Local<Value> argv[]); /** * Call an Object as a constructor if a callback is set by the * ObjectTemplate::SetCallAsFunctionHandler method. * Note: This method behaves like the Function::NewInstance method. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> CallAsConstructor( Local<Context> context, int argc, Local<Value> argv[]); /** * Return the isolate to which the Object belongs to. */ Isolate* GetIsolate(); /** * If this object is a Set, Map, WeakSet or WeakMap, this returns a * representation of the elements of this object as an array. * If this object is a SetIterator or MapIterator, this returns all * elements of the underlying collection, starting at the iterator's current * position. * For other types, this will return an empty MaybeLocal<Array> (without * scheduling an exception). */ MaybeLocal<Array> PreviewEntries(bool* is_key_value); static Local<Object> New(Isolate* isolate); /** * Creates a JavaScript object with the given properties, and * a the given prototype_or_null (which can be any JavaScript * value, and if it's null, the newly created object won't have * a prototype at all). This is similar to Object.create(). * All properties will be created as enumerable, configurable * and writable properties. */ static Local<Object> New(Isolate* isolate, Local<Value> prototype_or_null, Local<Name>* names, Local<Value>* values, size_t length); V8_INLINE static Object* Cast(Value* obj); private: Object(); static void CheckCast(Value* obj); Local<Value> SlowGetInternalField(int index); void* SlowGetAlignedPointerFromInternalField(int index); }; /** * An instance of the built-in array constructor (ECMA-262, 15.4.2). */ class V8_EXPORT Array : public Object { public: uint32_t Length() const; /** * Creates a JavaScript array with the given length. If the length * is negative the returned array will have length 0. */ static Local<Array> New(Isolate* isolate, int length = 0); /** * Creates a JavaScript array out of a Local<Value> array in C++ * with a known length. */ static Local<Array> New(Isolate* isolate, Local<Value>* elements, size_t length); V8_INLINE static Array* Cast(Value* obj); private: Array(); static void CheckCast(Value* obj); }; /** * An instance of the built-in Map constructor (ECMA-262, 6th Edition, 23.1.1). */ class V8_EXPORT Map : public Object { public: size_t Size() const; void Clear(); V8_WARN_UNUSED_RESULT MaybeLocal<Value> Get(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT MaybeLocal<Map> Set(Local<Context> context, Local<Value> key, Local<Value> value); V8_WARN_UNUSED_RESULT Maybe<bool> Has(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT Maybe<bool> Delete(Local<Context> context, Local<Value> key); /** * Returns an array of length Size() * 2, where index N is the Nth key and * index N + 1 is the Nth value. */ Local<Array> AsArray() const; /** * Creates a new empty Map. */ static Local<Map> New(Isolate* isolate); V8_INLINE static Map* Cast(Value* obj); private: Map(); static void CheckCast(Value* obj); }; /** * An instance of the built-in Set constructor (ECMA-262, 6th Edition, 23.2.1). */ class V8_EXPORT Set : public Object { public: size_t Size() const; void Clear(); V8_WARN_UNUSED_RESULT MaybeLocal<Set> Add(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT Maybe<bool> Has(Local<Context> context, Local<Value> key); V8_WARN_UNUSED_RESULT Maybe<bool> Delete(Local<Context> context, Local<Value> key); /** * Returns an array of the keys in this Set. */ Local<Array> AsArray() const; /** * Creates a new empty Set. */ static Local<Set> New(Isolate* isolate); V8_INLINE static Set* Cast(Value* obj); private: Set(); static void CheckCast(Value* obj); }; template<typename T> class ReturnValue { public: template <class S> V8_INLINE ReturnValue(const ReturnValue<S>& that)  : value_(that.value_) { static_assert(std::is_base_of<T, S>::value, "type check"); } // Local setters template <typename S> V8_INLINE void Set(const Global<S>& handle); template <typename S> V8_INLINE void Set(const TracedReferenceBase<S>& handle); template <typename S> V8_INLINE void Set(const Local<S> handle); // Fast primitive setters V8_INLINE void Set(bool value); V8_INLINE void Set(double i); V8_INLINE void Set(int32_t i); V8_INLINE void Set(uint32_t i); // Fast JS primitive setters V8_INLINE void SetNull(); V8_INLINE void SetUndefined(); V8_INLINE void SetEmptyString(); // Convenience getter for Isolate V8_INLINE Isolate* GetIsolate() const; // Pointer setter: Uncompilable to prevent inadvertent misuse. template <typename S> V8_INLINE void Set(S* whatever); // Getter. Creates a new Local<> so it comes with a certain performance // hit. If the ReturnValue was not yet set, this will return the undefined // value. V8_INLINE Local<Value> Get() const; private: template<class F> friend class ReturnValue; template<class F> friend class FunctionCallbackInfo; template<class F> friend class PropertyCallbackInfo; template <class F, class G, class H> friend class PersistentValueMapBase; V8_INLINE void SetInternal(internal::Address value) { *value_ = value; } V8_INLINE internal::Address GetDefaultValue(); V8_INLINE explicit ReturnValue(internal::Address* slot); internal::Address* value_; }; /** * The argument information given to function call callbacks. This * class provides access to information about the context of the call, * including the receiver, the number and values of arguments, and * the holder of the function. */ template<typename T> class FunctionCallbackInfo { public: /** The number of available arguments. */ V8_INLINE int Length() const; /** * Accessor for the available arguments. Returns `undefined` if the index * is out of bounds. */ V8_INLINE Local<Value> operator[](int i) const; /** Returns the receiver. This corresponds to the "this" value. */ V8_INLINE Local<Object> This() const; /** * If the callback was created without a Signature, this is the same * value as This(). If there is a signature, and the signature didn't match * This() but one of its hidden prototypes, this will be the respective * hidden prototype. * * Note that this is not the prototype of This() on which the accessor * referencing this callback was found (which in V8 internally is often * referred to as holder [sic]). */ V8_INLINE Local<Object> Holder() const; /** For construct calls, this returns the "new.target" value. */ V8_INLINE Local<Value> NewTarget() const; /** Indicates whether this is a regular call or a construct call. */ V8_INLINE bool IsConstructCall() const; /** The data argument specified when creating the callback. */ V8_INLINE Local<Value> Data() const; /** The current Isolate. */ V8_INLINE Isolate* GetIsolate() const; /** The ReturnValue for the call. */ V8_INLINE ReturnValue<T> GetReturnValue() const; // This shouldn't be public, but the arm compiler needs it. static const int kArgsLength = 6; protected: friend class internal::FunctionCallbackArguments; friend class internal::CustomArguments<FunctionCallbackInfo>; friend class debug::ConsoleCallArguments; static const int kHolderIndex = 0; static const int kIsolateIndex = 1; static const int kReturnValueDefaultValueIndex = 2; static const int kReturnValueIndex = 3; static const int kDataIndex = 4; static const int kNewTargetIndex = 5; V8_INLINE FunctionCallbackInfo(internal::Address* implicit_args, internal::Address* values, int length); internal::Address* implicit_args_; internal::Address* values_; int length_; }; /** * The information passed to a property callback about the context * of the property access. */ template<typename T> class PropertyCallbackInfo { public: /** * \return The isolate of the property access. */ V8_INLINE Isolate* GetIsolate() const; /** * \return The data set in the configuration, i.e., in * `NamedPropertyHandlerConfiguration` or * `IndexedPropertyHandlerConfiguration.` */ V8_INLINE Local<Value> Data() const; /** * \return The receiver. In many cases, this is the object on which the * property access was intercepted. When using * `Reflect.get`, `Function.prototype.call`, or similar functions, it is the * object passed in as receiver or thisArg. * * \code * void GetterCallback(Local<Name> name, * const v8::PropertyCallbackInfo<v8::Value>& info) { * auto context = info.GetIsolate()->GetCurrentContext(); * * v8::Local<v8::Value> a_this = * info.This() * ->GetRealNamedProperty(context, v8_str("a")) * .ToLocalChecked(); * v8::Local<v8::Value> a_holder = * info.Holder() * ->GetRealNamedProperty(context, v8_str("a")) * .ToLocalChecked(); * * CHECK(v8_str("r")->Equals(context, a_this).FromJust()); * CHECK(v8_str("obj")->Equals(context, a_holder).FromJust()); * * info.GetReturnValue().Set(name); * } * * v8::Local<v8::FunctionTemplate> templ = * v8::FunctionTemplate::New(isolate); * templ->InstanceTemplate()->SetHandler( * v8::NamedPropertyHandlerConfiguration(GetterCallback)); * LocalContext env; * env->Global() * ->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local()) * .ToLocalChecked() * ->NewInstance(env.local()) * .ToLocalChecked()) * .FromJust(); * * CompileRun("obj.a = 'obj'; var r = {a: 'r'}; Reflect.get(obj, 'x', r)"); * \endcode */ V8_INLINE Local<Object> This() const; /** * \return The object in the prototype chain of the receiver that has the * interceptor. Suppose you have `x` and its prototype is `y`, and `y` * has an interceptor. Then `info.This()` is `x` and `info.Holder()` is `y`. * The Holder() could be a hidden object (the global object, rather * than the global proxy). * * \note For security reasons, do not pass the object back into the runtime. */ V8_INLINE Local<Object> Holder() const; /** * \return The return value of the callback. * Can be changed by calling Set(). * \code * info.GetReturnValue().Set(...) * \endcode * */ V8_INLINE ReturnValue<T> GetReturnValue() const; /** * \return True if the intercepted function should throw if an error occurs. * Usually, `true` corresponds to `'use strict'`. * * \note Always `false` when intercepting `Reflect.set()` * independent of the language mode. */ V8_INLINE bool ShouldThrowOnError() const; // This shouldn't be public, but the arm compiler needs it. static const int kArgsLength = 7; protected: friend class MacroAssembler; friend class internal::PropertyCallbackArguments; friend class internal::CustomArguments<PropertyCallbackInfo>; static const int kShouldThrowOnErrorIndex = 0; static const int kHolderIndex = 1; static const int kIsolateIndex = 2; static const int kReturnValueDefaultValueIndex = 3; static const int kReturnValueIndex = 4; static const int kDataIndex = 5; static const int kThisIndex = 6; V8_INLINE PropertyCallbackInfo(internal::Address* args) : args_(args) {} internal::Address* args_; }; typedef void (*FunctionCallback)(const FunctionCallbackInfo<Value>& info); enum class ConstructorBehavior { kThrow, kAllow }; /** * A JavaScript function object (ECMA-262, 15.3). */ class V8_EXPORT Function : public Object { public: /** * Create a function in the current execution context * for a given FunctionCallback. */ static MaybeLocal<Function> New( Local<Context> context, FunctionCallback callback, Local<Value> data = Local<Value>(), int length = 0, ConstructorBehavior behavior = ConstructorBehavior::kAllow, SideEffectType side_effect_type = SideEffectType::kHasSideEffect); V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance( Local<Context> context, int argc, Local<Value> argv[]) const; V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance( Local<Context> context) const { return NewInstance(context, 0, nullptr); } /** * When side effect checks are enabled, passing kHasNoSideEffect allows the * constructor to be invoked without throwing. Calls made within the * constructor are still checked. */ V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstanceWithSideEffectType( Local<Context> context, int argc, Local<Value> argv[], SideEffectType side_effect_type = SideEffectType::kHasSideEffect) const; V8_WARN_UNUSED_RESULT MaybeLocal<Value> Call(Local<Context> context, Local<Value> recv, int argc, Local<Value> argv[]); void SetName(Local<String> name); Local<Value> GetName() const; /** * Name inferred from variable or property assignment of this function. * Used to facilitate debugging and profiling of JavaScript code written * in an OO style, where many functions are anonymous but are assigned * to object properties. */ Local<Value> GetInferredName() const; /** * displayName if it is set, otherwise name if it is configured, otherwise * function name, otherwise inferred name. */ Local<Value> GetDebugName() const; /** * User-defined name assigned to the "displayName" property of this function. * Used to facilitate debugging and profiling of JavaScript code. */ Local<Value> GetDisplayName() const; /** * Returns zero based line number of function body and * kLineOffsetNotFound if no information available. */ int GetScriptLineNumber() const; /** * Returns zero based column number of function body and * kLineOffsetNotFound if no information available. */ int GetScriptColumnNumber() const; /** * Returns scriptId. */ int ScriptId() const; /** * Returns the original function if this function is bound, else returns * v8::Undefined. */ Local<Value> GetBoundFunction() const; ScriptOrigin GetScriptOrigin() const; V8_INLINE static Function* Cast(Value* obj); static const int kLineOffsetNotFound; private: Function(); static void CheckCast(Value* obj); }; #ifndef V8_PROMISE_INTERNAL_FIELD_COUNT // The number of required internal fields can be defined by embedder. #define V8_PROMISE_INTERNAL_FIELD_COUNT 0 #endif /** * An instance of the built-in Promise constructor (ES6 draft). */ class V8_EXPORT Promise : public Object { public: /** * State of the promise. Each value corresponds to one of the possible values * of the [[PromiseState]] field. */ enum PromiseState { kPending, kFulfilled, kRejected }; class V8_EXPORT Resolver : public Object { public: /** * Create a new resolver, along with an associated promise in pending state. */ static V8_WARN_UNUSED_RESULT MaybeLocal<Resolver> New( Local<Context> context); /** * Extract the associated promise. */ Local<Promise> GetPromise(); /** * Resolve/reject the associated promise with a given value. * Ignored if the promise is no longer pending. */ V8_WARN_UNUSED_RESULT Maybe<bool> Resolve(Local<Context> context, Local<Value> value); V8_WARN_UNUSED_RESULT Maybe<bool> Reject(Local<Context> context, Local<Value> value); V8_INLINE static Resolver* Cast(Value* obj); private: Resolver(); static void CheckCast(Value* obj); }; /** * Register a resolution/rejection handler with a promise. * The handler is given the respective resolution/rejection value as * an argument. If the promise is already resolved/rejected, the handler is * invoked at the end of turn. */ V8_WARN_UNUSED_RESULT MaybeLocal<Promise> Catch(Local<Context> context, Local<Function> handler); V8_WARN_UNUSED_RESULT MaybeLocal<Promise> Then(Local<Context> context, Local<Function> handler); V8_WARN_UNUSED_RESULT MaybeLocal<Promise> Then(Local<Context> context, Local<Function> on_fulfilled, Local<Function> on_rejected); /** * Returns true if the promise has at least one derived promise, and * therefore resolve/reject handlers (including default handler). */ bool HasHandler(); /** * Returns the content of the [[PromiseResult]] field. The Promise must not * be pending. */ Local<Value> Result(); /** * Returns the value of the [[PromiseState]] field. */ PromiseState State(); /** * Marks this promise as handled to avoid reporting unhandled rejections. */ void MarkAsHandled(); V8_INLINE static Promise* Cast(Value* obj); static const int kEmbedderFieldCount = V8_PROMISE_INTERNAL_FIELD_COUNT; private: Promise(); static void CheckCast(Value* obj); }; /** * An instance of a Property Descriptor, see Ecma-262 6.2.4. * * Properties in a descriptor are present or absent. If you do not set * `enumerable`, `configurable`, and `writable`, they are absent. If `value`, * `get`, or `set` are absent, but you must specify them in the constructor, use * empty handles. * * Accessors `get` and `set` must be callable or undefined if they are present. * * \note Only query properties if they are present, i.e., call `x()` only if * `has_x()` returns true. * * \code * // var desc = {writable: false} * v8::PropertyDescriptor d(Local<Value>()), false); * d.value(); // error, value not set * if (d.has_writable()) { * d.writable(); // false * } * * // var desc = {value: undefined} * v8::PropertyDescriptor d(v8::Undefined(isolate)); * * // var desc = {get: undefined} * v8::PropertyDescriptor d(v8::Undefined(isolate), Local<Value>())); * \endcode */ class V8_EXPORT PropertyDescriptor { public: // GenericDescriptor PropertyDescriptor(); // DataDescriptor explicit PropertyDescriptor(Local<Value> value); // DataDescriptor with writable property PropertyDescriptor(Local<Value> value, bool writable); // AccessorDescriptor PropertyDescriptor(Local<Value> get, Local<Value> set); ~PropertyDescriptor(); Local<Value> value() const; bool has_value() const; Local<Value> get() const; bool has_get() const; Local<Value> set() const; bool has_set() const; void set_enumerable(bool enumerable); bool enumerable() const; bool has_enumerable() const; void set_configurable(bool configurable); bool configurable() const; bool has_configurable() const; bool writable() const; bool has_writable() const; struct PrivateData; PrivateData* get_private() const { return private_; } PropertyDescriptor(const PropertyDescriptor&) = delete; void operator=(const PropertyDescriptor&) = delete; private: PrivateData* private_; }; /** * An instance of the built-in Proxy constructor (ECMA-262, 6th Edition, * 26.2.1). */ class V8_EXPORT Proxy : public Object { public: Local<Value> GetTarget(); Local<Value> GetHandler(); bool IsRevoked(); void Revoke(); /** * Creates a new Proxy for the target object. */ static MaybeLocal<Proxy> New(Local<Context> context, Local<Object> local_target, Local<Object> local_handler); V8_INLINE static Proxy* Cast(Value* obj); private: Proxy(); static void CheckCast(Value* obj); }; /** * Points to an unowned continous buffer holding a known number of elements. * * This is similar to std::span (under consideration for C++20), but does not * require advanced C++ support. In the (far) future, this may be replaced with * or aliased to std::span. * * To facilitate future migration, this class exposes a subset of the interface * implemented by std::span. */ template <typename T> class V8_EXPORT MemorySpan { public: /** The default constructor creates an empty span. */ constexpr MemorySpan() = default; constexpr MemorySpan(T* data, size_t size) : data_(data), size_(size) {} /** Returns a pointer to the beginning of the buffer. */ constexpr T* data() const { return data_; } /** Returns the number of elements that the buffer holds. */ constexpr size_t size() const { return size_; } private: T* data_ = nullptr; size_t size_ = 0; }; /** * An owned byte buffer with associated size. */ struct OwnedBuffer { std::unique_ptr<const uint8_t[]> buffer; size_t size = 0; OwnedBuffer(std::unique_ptr<const uint8_t[]> buffer, size_t size)  : buffer(std::move(buffer)), size(size) {} OwnedBuffer() = default; }; // Wrapper around a compiled WebAssembly module, which is potentially shared by // different WasmModuleObjects. class V8_EXPORT CompiledWasmModule { public: /** * Serialize the compiled module. The serialized data does not include the * wire bytes. */ OwnedBuffer Serialize(); /** * Get the (wasm-encoded) wire bytes that were used to compile this module. */ MemorySpan<const uint8_t> GetWireBytesRef(); const std::string& source_url() const { return source_url_; } private: friend class WasmModuleObject; friend class WasmStreaming; explicit CompiledWasmModule(std::shared_ptr<internal::wasm::NativeModule>, const char* source_url, size_t url_length); const std::shared_ptr<internal::wasm::NativeModule> native_module_; const std::string source_url_; }; // An instance of WebAssembly.Module. class V8_EXPORT WasmModuleObject : public Object { public: WasmModuleObject() = delete; /** * Efficiently re-create a WasmModuleObject, without recompiling, from * a CompiledWasmModule. */ static MaybeLocal<WasmModuleObject> FromCompiledModule( Isolate* isolate, const CompiledWasmModule&); /** * Get the compiled module for this module object. The compiled module can be * shared by several module objects. */ CompiledWasmModule GetCompiledModule(); V8_INLINE static WasmModuleObject* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * The V8 interface for WebAssembly streaming compilation. When streaming * compilation is initiated, V8 passes a {WasmStreaming} object to the embedder * such that the embedder can pass the input bytes for streaming compilation to * V8. */ class V8_EXPORT WasmStreaming final { public: class WasmStreamingImpl; /** * Client to receive streaming event notifications. */ class Client { public: virtual ~Client() = default; /** * Passes the fully compiled module to the client. This can be used to * implement code caching. */ virtual void OnModuleCompiled(CompiledWasmModule compiled_module) = 0; }; explicit WasmStreaming(std::unique_ptr<WasmStreamingImpl> impl); ~WasmStreaming(); /** * Pass a new chunk of bytes to WebAssembly streaming compilation. * The buffer passed into {OnBytesReceived} is owned by the caller. */ void OnBytesReceived(const uint8_t* bytes, size_t size); /** * {Finish} should be called after all received bytes where passed to * {OnBytesReceived} to tell V8 that there will be no more bytes. {Finish} * does not have to be called after {Abort} has been called already. */ void Finish(); /** * Abort streaming compilation. If {exception} has a value, then the promise * associated with streaming compilation is rejected with that value. If * {exception} does not have value, the promise does not get rejected. */ void Abort(MaybeLocal<Value> exception); /** * Passes previously compiled module bytes. This must be called before * {OnBytesReceived}, {Finish}, or {Abort}. Returns true if the module bytes * can be used, false otherwise. The buffer passed via {bytes} and {size} * is owned by the caller. If {SetCompiledModuleBytes} returns true, the * buffer must remain valid until either {Finish} or {Abort} completes. */ bool SetCompiledModuleBytes(const uint8_t* bytes, size_t size); /** * Sets the client object that will receive streaming event notifications. * This must be called before {OnBytesReceived}, {Finish}, or {Abort}. */ void SetClient(std::shared_ptr<Client> client); /* * Sets the UTF-8 encoded source URL for the {Script} object. This must be * called before {Finish}. */ void SetUrl(const char* url, size_t length); /** * Unpacks a {WasmStreaming} object wrapped in a {Managed} for the embedder. * Since the embedder is on the other side of the API, it cannot unpack the * {Managed} itself. */ static std::shared_ptr<WasmStreaming> Unpack(Isolate* isolate, Local<Value> value); private: std::unique_ptr<WasmStreamingImpl> impl_; }; // TODO(mtrofin): when streaming compilation is done, we can rename this // to simply WasmModuleObjectBuilder class V8_EXPORT WasmModuleObjectBuilderStreaming final { public: explicit WasmModuleObjectBuilderStreaming(Isolate* isolate); /** * The buffer passed into OnBytesReceived is owned by the caller. */ void OnBytesReceived(const uint8_t*, size_t size); void Finish(); /** * Abort streaming compilation. If {exception} has a value, then the promise * associated with streaming compilation is rejected with that value. If * {exception} does not have value, the promise does not get rejected. */ void Abort(MaybeLocal<Value> exception); Local<Promise> GetPromise(); ~WasmModuleObjectBuilderStreaming() = default; private: WasmModuleObjectBuilderStreaming(const WasmModuleObjectBuilderStreaming&) = delete; WasmModuleObjectBuilderStreaming(WasmModuleObjectBuilderStreaming&&) = default; WasmModuleObjectBuilderStreaming& operator=( const WasmModuleObjectBuilderStreaming&) = delete; WasmModuleObjectBuilderStreaming& operator=( WasmModuleObjectBuilderStreaming&&) = default; Isolate* isolate_ = nullptr; #if V8_CC_MSVC /** * We don't need the static Copy API, so the default * NonCopyablePersistentTraits would be sufficient, however, * MSVC eagerly instantiates the Copy. * We ensure we don't use Copy, however, by compiling with the * defaults everywhere else. */ Persistent<Promise, CopyablePersistentTraits<Promise>> promise_; #else Persistent<Promise> promise_; #endif std::shared_ptr<internal::wasm::StreamingDecoder> streaming_decoder_; }; #ifndef V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT // The number of required internal fields can be defined by embedder. #define V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT 2 #endif enum class ArrayBufferCreationMode { kInternalized, kExternalized }; /** * A wrapper around the backing store (i.e. the raw memory) of an array buffer. * See a document linked in http://crbug.com/v8/9908 for more information. * * The allocation and destruction of backing stores is generally managed by * V8. Clients should always use standard C++ memory ownership types (i.e. * std::unique_ptr and std::shared_ptr) to manage lifetimes of backing stores * properly, since V8 internal objects may alias backing stores. * * This object does not keep the underlying |ArrayBuffer::Allocator| alive by * default. Use Isolate::CreateParams::array_buffer_allocator_shared when * creating the Isolate to make it hold a reference to the allocator itself. */ class V8_EXPORT BackingStore : public v8::internal::BackingStoreBase { public: ~BackingStore(); /** * Return a pointer to the beginning of the memory block for this backing * store. The pointer is only valid as long as this backing store object * lives. */ void* Data() const; /** * The length (in bytes) of this backing store. */ size_t ByteLength() const; /** * Indicates whether the backing store was created for an ArrayBuffer or * a SharedArrayBuffer. */ bool IsShared() const; /** * Wrapper around ArrayBuffer::Allocator::Reallocate that preserves IsShared. * Assumes that the backing_store was allocated by the ArrayBuffer allocator * of the given isolate. */ static std::unique_ptr<BackingStore> Reallocate( v8::Isolate* isolate, std::unique_ptr<BackingStore> backing_store, size_t byte_length); /** * This callback is used only if the memory block for a BackingStore cannot be * allocated with an ArrayBuffer::Allocator. In such cases the destructor of * the BackingStore invokes the callback to free the memory block. */ using DeleterCallback = void (*)(void* data, size_t length, void* deleter_data); /** * If the memory block of a BackingStore is static or is managed manually, * then this empty deleter along with nullptr deleter_data can be passed to * ArrayBuffer::NewBackingStore to indicate that. * * The manually managed case should be used with caution and only when it * is guaranteed that the memory block freeing happens after detaching its * ArrayBuffer. */ static void EmptyDeleter(void* data, size_t length, void* deleter_data); private: /** * See [Shared]ArrayBuffer::GetBackingStore and * [Shared]ArrayBuffer::NewBackingStore. */ BackingStore(); }; #if !defined(V8_IMMINENT_DEPRECATION_WARNINGS) // Use v8::BackingStore::DeleterCallback instead. using BackingStoreDeleterCallback = void (*)(void* data, size_t length, void* deleter_data); #endif /** * An instance of the built-in ArrayBuffer constructor (ES6 draft 15.13.5). */ class V8_EXPORT ArrayBuffer : public Object { public: /** * A thread-safe allocator that V8 uses to allocate |ArrayBuffer|'s memory. * The allocator is a global V8 setting. It has to be set via * Isolate::CreateParams. * * Memory allocated through this allocator by V8 is accounted for as external * memory by V8. Note that V8 keeps track of the memory for all internalized * |ArrayBuffer|s. Responsibility for tracking external memory (using * Isolate::AdjustAmountOfExternalAllocatedMemory) is handed over to the * embedder upon externalization and taken over upon internalization (creating * an internalized buffer from an existing buffer). * * Note that it is unsafe to call back into V8 from any of the allocator * functions. */ class V8_EXPORT Allocator { // NOLINT public: virtual ~Allocator() = default; /** * Allocate |length| bytes. Return nullptr if allocation is not successful. * Memory should be initialized to zeroes. */ virtual void* Allocate(size_t length) = 0; /** * Allocate |length| bytes. Return nullptr if allocation is not successful. * Memory does not have to be initialized. */ virtual void* AllocateUninitialized(size_t length) = 0; /** * Free the memory block of size |length|, pointed to by |data|. * That memory is guaranteed to be previously allocated by |Allocate|. */ virtual void Free(void* data, size_t length) = 0; /** * Reallocate the memory block of size |old_length| to a memory block of * size |new_length| by expanding, contracting, or copying the existing * memory block. If |new_length| > |old_length|, then the new part of * the memory must be initialized to zeros. Return nullptr if reallocation * is not successful. * * The caller guarantees that the memory block was previously allocated * using Allocate or AllocateUninitialized. * * The default implementation allocates a new block and copies data. */ virtual void* Reallocate(void* data, size_t old_length, size_t new_length); /** * ArrayBuffer allocation mode. kNormal is a malloc/free style allocation, * while kReservation is for larger allocations with the ability to set * access permissions. */ enum class AllocationMode { kNormal, kReservation }; /** * malloc/free based convenience allocator. * * Caller takes ownership, i.e. the returned object needs to be freed using * |delete allocator| once it is no longer in use. */ static Allocator* NewDefaultAllocator(); }; /** * The contents of an |ArrayBuffer|. Externalization of |ArrayBuffer| * returns an instance of this class, populated, with a pointer to data * and byte length. * * The Data pointer of ArrayBuffer::Contents must be freed using the provided * deleter, which will call ArrayBuffer::Allocator::Free if the buffer * was allocated with ArraryBuffer::Allocator::Allocate. */ class V8_EXPORT Contents { // NOLINT public: using DeleterCallback = void (*)(void* buffer, size_t length, void* info); Contents()  : data_(nullptr), byte_length_(0), allocation_base_(nullptr), allocation_length_(0), allocation_mode_(Allocator::AllocationMode::kNormal), deleter_(nullptr), deleter_data_(nullptr) {} void* AllocationBase() const { return allocation_base_; } size_t AllocationLength() const { return allocation_length_; } Allocator::AllocationMode AllocationMode() const { return allocation_mode_; } void* Data() const { return data_; } size_t ByteLength() const { return byte_length_; } DeleterCallback Deleter() const { return deleter_; } void* DeleterData() const { return deleter_data_; } private: Contents(void* data, size_t byte_length, void* allocation_base, size_t allocation_length, Allocator::AllocationMode allocation_mode, DeleterCallback deleter, void* deleter_data); void* data_; size_t byte_length_; void* allocation_base_; size_t allocation_length_; Allocator::AllocationMode allocation_mode_; DeleterCallback deleter_; void* deleter_data_; friend class ArrayBuffer; }; /** * Data length in bytes. */ size_t ByteLength() const; /** * Create a new ArrayBuffer. Allocate |byte_length| bytes. * Allocated memory will be owned by a created ArrayBuffer and * will be deallocated when it is garbage-collected, * unless the object is externalized. */ static Local<ArrayBuffer> New(Isolate* isolate, size_t byte_length); /** * Create a new ArrayBuffer over an existing memory block. * The created array buffer is by default immediately in externalized state. * In externalized state, the memory block will not be reclaimed when a * created ArrayBuffer is garbage-collected. * In internalized state, the memory block will be released using * |Allocator::Free| once all ArrayBuffers referencing it are collected by * the garbage collector. */ V8_DEPRECATE_SOON( "Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908.") static Local<ArrayBuffer> New( Isolate* isolate, void* data, size_t byte_length, ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized); /** * Create a new ArrayBuffer with an existing backing store. * The created array keeps a reference to the backing store until the array * is garbage collected. Note that the IsExternal bit does not affect this * reference from the array to the backing store. * * In future IsExternal bit will be removed. Until then the bit is set as * follows. If the backing store does not own the underlying buffer, then * the array is created in externalized state. Otherwise, the array is created * in internalized state. In the latter case the array can be transitioned * to the externalized state using Externalize(backing_store). */ static Local<ArrayBuffer> New(Isolate* isolate, std::shared_ptr<BackingStore> backing_store); /** * Returns a new standalone BackingStore that is allocated using the array * buffer allocator of the isolate. The result can be later passed to * ArrayBuffer::New. * * If the allocator returns nullptr, then the function may cause GCs in the * given isolate and re-try the allocation. If GCs do not help, then the * function will crash with an out-of-memory error. */ static std::unique_ptr<BackingStore> NewBackingStore(Isolate* isolate, size_t byte_length); /** * Returns a new standalone BackingStore that takes over the ownership of * the given buffer. The destructor of the BackingStore invokes the given * deleter callback. * * The result can be later passed to ArrayBuffer::New. The raw pointer * to the buffer must not be passed again to any V8 API function. */ static std::unique_ptr<BackingStore> NewBackingStore( void* data, size_t byte_length, v8::BackingStore::DeleterCallback deleter, void* deleter_data); /** * Returns true if ArrayBuffer is externalized, that is, does not * own its memory block. */ V8_DEPRECATE_SOON( "With v8::BackingStore externalized ArrayBuffers are " "the same as ordinary ArrayBuffers. See http://crbug.com/v8/9908.") bool IsExternal() const; /** * Returns true if this ArrayBuffer may be detached. */ bool IsDetachable() const; /** * Detaches this ArrayBuffer and all its views (typed arrays). * Detaching sets the byte length of the buffer and all typed arrays to zero, * preventing JavaScript from ever accessing underlying backing store. * ArrayBuffer should have been externalized and must be detachable. */ void Detach(); /** * Make this ArrayBuffer external. The pointer to underlying memory block * and byte length are returned as |Contents| structure. After ArrayBuffer * had been externalized, it does no longer own the memory block. The caller * should take steps to free memory when it is no longer needed. * * The Data pointer of ArrayBuffer::Contents must be freed using the provided * deleter, which will call ArrayBuffer::Allocator::Free if the buffer * was allocated with ArrayBuffer::Allocator::Allocate. */ V8_DEPRECATE_SOON( "Use GetBackingStore or Detach. See http://crbug.com/v8/9908.") Contents Externalize(); /** * Marks this ArrayBuffer external given a witness that the embedder * has fetched the backing store using the new GetBackingStore() function. * * With the new lifetime management of backing stores there is no need for * externalizing, so this function exists only to make the transition easier. */ V8_DEPRECATE_SOON("This will be removed together with IsExternal.") void Externalize(const std::shared_ptr<BackingStore>& backing_store); /** * Get a pointer to the ArrayBuffer's underlying memory block without * externalizing it. If the ArrayBuffer is not externalized, this pointer * will become invalid as soon as the ArrayBuffer gets garbage collected. * * The embedder should make sure to hold a strong reference to the * ArrayBuffer while accessing this pointer. */ V8_DEPRECATE_SOON("Use GetBackingStore. See http://crbug.com/v8/9908.") Contents GetContents(); /** * Get a shared pointer to the backing store of this array buffer. This * pointer coordinates the lifetime management of the internal storage * with any live ArrayBuffers on the heap, even across isolates. The embedder * should not attempt to manage lifetime of the storage through other means. * * This function replaces both Externalize() and GetContents(). */ std::shared_ptr<BackingStore> GetBackingStore(); V8_INLINE static ArrayBuffer* Cast(Value* obj); static const int kInternalFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT; static const int kEmbedderFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT; private: ArrayBuffer(); static void CheckCast(Value* obj); Contents GetContents(bool externalize); }; #ifndef V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT // The number of required internal fields can be defined by embedder. #define V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT 2 #endif /** * A base class for an instance of one of "views" over ArrayBuffer, * including TypedArrays and DataView (ES6 draft 15.13). */ class V8_EXPORT ArrayBufferView : public Object { public: /** * Returns underlying ArrayBuffer. */ Local<ArrayBuffer> Buffer(); /** * Byte offset in |Buffer|. */ size_t ByteOffset(); /** * Size of a view in bytes. */ size_t ByteLength(); /** * Copy the contents of the ArrayBufferView's buffer to an embedder defined * memory without additional overhead that calling ArrayBufferView::Buffer * might incur. * * Will write at most min(|byte_length|, ByteLength) bytes starting at * ByteOffset of the underlying buffer to the memory starting at |dest|. * Returns the number of bytes actually written. */ size_t CopyContents(void* dest, size_t byte_length); /** * Returns true if ArrayBufferView's backing ArrayBuffer has already been * allocated. */ bool HasBuffer() const; V8_INLINE static ArrayBufferView* Cast(Value* obj); static const int kInternalFieldCount = V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT; static const int kEmbedderFieldCount = V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT; private: ArrayBufferView(); static void CheckCast(Value* obj); }; /** * A base class for an instance of TypedArray series of constructors * (ES6 draft 15.13.6). */ class V8_EXPORT TypedArray : public ArrayBufferView { public: /* * The largest typed array size that can be constructed using New. */ static constexpr size_t kMaxLength = internal::kApiSystemPointerSize == 4  ? internal::kSmiMaxValue  : 0xFFFFFFFF; /** * Number of elements in this typed array * (e.g. for Int16Array, |ByteLength|/2). */ size_t Length(); V8_INLINE static TypedArray* Cast(Value* obj); private: TypedArray(); static void CheckCast(Value* obj); }; /** * An instance of Uint8Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Uint8Array : public TypedArray { public: static Local<Uint8Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Uint8Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Uint8Array* Cast(Value* obj); private: Uint8Array(); static void CheckCast(Value* obj); }; /** * An instance of Uint8ClampedArray constructor (ES6 draft 15.13.6). */ class V8_EXPORT Uint8ClampedArray : public TypedArray { public: static Local<Uint8ClampedArray> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Uint8ClampedArray> New( Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Uint8ClampedArray* Cast(Value* obj); private: Uint8ClampedArray(); static void CheckCast(Value* obj); }; /** * An instance of Int8Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Int8Array : public TypedArray { public: static Local<Int8Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Int8Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Int8Array* Cast(Value* obj); private: Int8Array(); static void CheckCast(Value* obj); }; /** * An instance of Uint16Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Uint16Array : public TypedArray { public: static Local<Uint16Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Uint16Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Uint16Array* Cast(Value* obj); private: Uint16Array(); static void CheckCast(Value* obj); }; /** * An instance of Int16Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Int16Array : public TypedArray { public: static Local<Int16Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Int16Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Int16Array* Cast(Value* obj); private: Int16Array(); static void CheckCast(Value* obj); }; /** * An instance of Uint32Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Uint32Array : public TypedArray { public: static Local<Uint32Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Uint32Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Uint32Array* Cast(Value* obj); private: Uint32Array(); static void CheckCast(Value* obj); }; /** * An instance of Int32Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Int32Array : public TypedArray { public: static Local<Int32Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Int32Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Int32Array* Cast(Value* obj); private: Int32Array(); static void CheckCast(Value* obj); }; /** * An instance of Float32Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Float32Array : public TypedArray { public: static Local<Float32Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Float32Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Float32Array* Cast(Value* obj); private: Float32Array(); static void CheckCast(Value* obj); }; /** * An instance of Float64Array constructor (ES6 draft 15.13.6). */ class V8_EXPORT Float64Array : public TypedArray { public: static Local<Float64Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<Float64Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static Float64Array* Cast(Value* obj); private: Float64Array(); static void CheckCast(Value* obj); }; /** * An instance of BigInt64Array constructor. */ class V8_EXPORT BigInt64Array : public TypedArray { public: static Local<BigInt64Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<BigInt64Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static BigInt64Array* Cast(Value* obj); private: BigInt64Array(); static void CheckCast(Value* obj); }; /** * An instance of BigUint64Array constructor. */ class V8_EXPORT BigUint64Array : public TypedArray { public: static Local<BigUint64Array> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<BigUint64Array> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static BigUint64Array* Cast(Value* obj); private: BigUint64Array(); static void CheckCast(Value* obj); }; /** * An instance of DataView constructor (ES6 draft 15.13.7). */ class V8_EXPORT DataView : public ArrayBufferView { public: static Local<DataView> New(Local<ArrayBuffer> array_buffer, size_t byte_offset, size_t length); static Local<DataView> New(Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset, size_t length); V8_INLINE static DataView* Cast(Value* obj); private: DataView(); static void CheckCast(Value* obj); }; /** * An instance of the built-in SharedArrayBuffer constructor. */ class V8_EXPORT SharedArrayBuffer : public Object { public: /** * The contents of an |SharedArrayBuffer|. Externalization of * |SharedArrayBuffer| returns an instance of this class, populated, with a * pointer to data and byte length. * * The Data pointer of ArrayBuffer::Contents must be freed using the provided * deleter, which will call ArrayBuffer::Allocator::Free if the buffer * was allocated with ArraryBuffer::Allocator::Allocate. */ class V8_EXPORT Contents { // NOLINT public: using Allocator = v8::ArrayBuffer::Allocator; using DeleterCallback = void (*)(void* buffer, size_t length, void* info); Contents()  : data_(nullptr), byte_length_(0), allocation_base_(nullptr), allocation_length_(0), allocation_mode_(Allocator::AllocationMode::kNormal), deleter_(nullptr), deleter_data_(nullptr) {} void* AllocationBase() const { return allocation_base_; } size_t AllocationLength() const { return allocation_length_; } Allocator::AllocationMode AllocationMode() const { return allocation_mode_; } void* Data() const { return data_; } size_t ByteLength() const { return byte_length_; } DeleterCallback Deleter() const { return deleter_; } void* DeleterData() const { return deleter_data_; } private: Contents(void* data, size_t byte_length, void* allocation_base, size_t allocation_length, Allocator::AllocationMode allocation_mode, DeleterCallback deleter, void* deleter_data); void* data_; size_t byte_length_; void* allocation_base_; size_t allocation_length_; Allocator::AllocationMode allocation_mode_; DeleterCallback deleter_; void* deleter_data_; friend class SharedArrayBuffer; }; /** * Data length in bytes. */ size_t ByteLength() const; /** * Create a new SharedArrayBuffer. Allocate |byte_length| bytes. * Allocated memory will be owned by a created SharedArrayBuffer and * will be deallocated when it is garbage-collected, * unless the object is externalized. */ static Local<SharedArrayBuffer> New(Isolate* isolate, size_t byte_length); /** * Create a new SharedArrayBuffer over an existing memory block. The created * array buffer is immediately in externalized state unless otherwise * specified. The memory block will not be reclaimed when a created * SharedArrayBuffer is garbage-collected. */ V8_DEPRECATE_SOON( "Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908.") static Local<SharedArrayBuffer> New( Isolate* isolate, void* data, size_t byte_length, ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized); /** * Create a new SharedArrayBuffer with an existing backing store. * The created array keeps a reference to the backing store until the array * is garbage collected. Note that the IsExternal bit does not affect this * reference from the array to the backing store. * * In future IsExternal bit will be removed. Until then the bit is set as * follows. If the backing store does not own the underlying buffer, then * the array is created in externalized state. Otherwise, the array is created * in internalized state. In the latter case the array can be transitioned * to the externalized state using Externalize(backing_store). */ static Local<SharedArrayBuffer> New( Isolate* isolate, std::shared_ptr<BackingStore> backing_store); /** * Returns a new standalone BackingStore that is allocated using the array * buffer allocator of the isolate. The result can be later passed to * SharedArrayBuffer::New. * * If the allocator returns nullptr, then the function may cause GCs in the * given isolate and re-try the allocation. If GCs do not help, then the * function will crash with an out-of-memory error. */ static std::unique_ptr<BackingStore> NewBackingStore(Isolate* isolate, size_t byte_length); /** * Returns a new standalone BackingStore that takes over the ownership of * the given buffer. The destructor of the BackingStore invokes the given * deleter callback. * * The result can be later passed to SharedArrayBuffer::New. The raw pointer * to the buffer must not be passed again to any V8 functions. */ static std::unique_ptr<BackingStore> NewBackingStore( void* data, size_t byte_length, v8::BackingStore::DeleterCallback deleter, void* deleter_data); /** * Create a new SharedArrayBuffer over an existing memory block. Propagate * flags to indicate whether the underlying buffer can be grown. */ V8_DEPRECATED( "Use the version that takes a BackingStore. " "See http://crbug.com/v8/9908.") static Local<SharedArrayBuffer> New( Isolate* isolate, const SharedArrayBuffer::Contents&, ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized); /** * Returns true if SharedArrayBuffer is externalized, that is, does not * own its memory block. */ V8_DEPRECATE_SOON( "With v8::BackingStore externalized SharedArrayBuffers are the same " "as ordinary SharedArrayBuffers. See http://crbug.com/v8/9908.") bool IsExternal() const; /** * Make this SharedArrayBuffer external. The pointer to underlying memory * block and byte length are returned as |Contents| structure. After * SharedArrayBuffer had been externalized, it does no longer own the memory * block. The caller should take steps to free memory when it is no longer * needed. * * The memory block is guaranteed to be allocated with |Allocator::Allocate| * by the allocator specified in * v8::Isolate::CreateParams::array_buffer_allocator. * */ V8_DEPRECATE_SOON( "Use GetBackingStore or Detach. See http://crbug.com/v8/9908.") Contents Externalize(); /** * Marks this SharedArrayBuffer external given a witness that the embedder * has fetched the backing store using the new GetBackingStore() function. * * With the new lifetime management of backing stores there is no need for * externalizing, so this function exists only to make the transition easier. */ V8_DEPRECATE_SOON("This will be removed together with IsExternal.") void Externalize(const std::shared_ptr<BackingStore>& backing_store); /** * Get a pointer to the ArrayBuffer's underlying memory block without * externalizing it. If the ArrayBuffer is not externalized, this pointer * will become invalid as soon as the ArrayBuffer became garbage collected. * * The embedder should make sure to hold a strong reference to the * ArrayBuffer while accessing this pointer. * * The memory block is guaranteed to be allocated with |Allocator::Allocate| * by the allocator specified in * v8::Isolate::CreateParams::array_buffer_allocator. */ V8_DEPRECATE_SOON("Use GetBackingStore. See http://crbug.com/v8/9908.") Contents GetContents(); /** * Get a shared pointer to the backing store of this array buffer. This * pointer coordinates the lifetime management of the internal storage * with any live ArrayBuffers on the heap, even across isolates. The embedder * should not attempt to manage lifetime of the storage through other means. * * This function replaces both Externalize() and GetContents(). */ std::shared_ptr<BackingStore> GetBackingStore(); V8_INLINE static SharedArrayBuffer* Cast(Value* obj); static const int kInternalFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT; private: SharedArrayBuffer(); static void CheckCast(Value* obj); Contents GetContents(bool externalize); }; /** * An instance of the built-in Date constructor (ECMA-262, 15.9). */ class V8_EXPORT Date : public Object { public: static V8_WARN_UNUSED_RESULT MaybeLocal<Value> New(Local<Context> context, double time); /** * A specialization of Value::NumberValue that is more efficient * because we know the structure of this object. */ double ValueOf() const; V8_INLINE static Date* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A Number object (ECMA-262, 4.3.21). */ class V8_EXPORT NumberObject : public Object { public: static Local<Value> New(Isolate* isolate, double value); double ValueOf() const; V8_INLINE static NumberObject* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A BigInt object (https://tc39.github.io/proposal-bigint) */ class V8_EXPORT BigIntObject : public Object { public: static Local<Value> New(Isolate* isolate, int64_t value); Local<BigInt> ValueOf() const; V8_INLINE static BigIntObject* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A Boolean object (ECMA-262, 4.3.15). */ class V8_EXPORT BooleanObject : public Object { public: static Local<Value> New(Isolate* isolate, bool value); bool ValueOf() const; V8_INLINE static BooleanObject* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A String object (ECMA-262, 4.3.18). */ class V8_EXPORT StringObject : public Object { public: static Local<Value> New(Isolate* isolate, Local<String> value); Local<String> ValueOf() const; V8_INLINE static StringObject* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A Symbol object (ECMA-262 edition 6). */ class V8_EXPORT SymbolObject : public Object { public: static Local<Value> New(Isolate* isolate, Local<Symbol> value); Local<Symbol> ValueOf() const; V8_INLINE static SymbolObject* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * An instance of the built-in RegExp constructor (ECMA-262, 15.10). */ class V8_EXPORT RegExp : public Object { public: /** * Regular expression flag bits. They can be or'ed to enable a set * of flags. */ enum Flags { kNone = 0, kGlobal = 1 << 0, kIgnoreCase = 1 << 1, kMultiline = 1 << 2, kSticky = 1 << 3, kUnicode = 1 << 4, kDotAll = 1 << 5, }; static constexpr int kFlagCount = 6; /** * Creates a regular expression from the given pattern string and * the flags bit field. May throw a JavaScript exception as * described in ECMA-262, 15.10.4.1. * * For example, * RegExp::New(v8::String::New("foo"), * static_cast<RegExp::Flags>(kGlobal | kMultiline)) * is equivalent to evaluating "/foo/gm". */ static V8_WARN_UNUSED_RESULT MaybeLocal<RegExp> New(Local<Context> context, Local<String> pattern, Flags flags); /** * Like New, but additionally specifies a backtrack limit. If the number of * backtracks done in one Exec call hits the limit, a match failure is * immediately returned. */ static V8_WARN_UNUSED_RESULT MaybeLocal<RegExp> NewWithBacktrackLimit( Local<Context> context, Local<String> pattern, Flags flags, uint32_t backtrack_limit); /** * Executes the current RegExp instance on the given subject string. * Equivalent to RegExp.prototype.exec as described in * * https://tc39.es/ecma262/#sec-regexp.prototype.exec * * On success, an Array containing the matched strings is returned. On * failure, returns Null. * * Note: modifies global context state, accessible e.g. through RegExp.input. */ V8_WARN_UNUSED_RESULT MaybeLocal<Object> Exec(Local<Context> context, Local<String> subject); /** * Returns the value of the source property: a string representing * the regular expression. */ Local<String> GetSource() const; /** * Returns the flags bit field. */ Flags GetFlags() const; V8_INLINE static RegExp* Cast(Value* obj); private: static void CheckCast(Value* obj); }; /** * A JavaScript value that wraps a C++ void*. This type of value is mainly used * to associate C++ data structures with JavaScript objects. */ class V8_EXPORT External : public Value { public: static Local<External> New(Isolate* isolate, void* value); V8_INLINE static External* Cast(Value* obj); void* Value() const; private: static void CheckCast(v8::Value* obj); }; #define V8_INTRINSICS_LIST(F) \ F(ArrayProto_entries, array_entries_iterator) \ F(ArrayProto_forEach, array_for_each_iterator) \ F(ArrayProto_keys, array_keys_iterator) \ F(ArrayProto_values, array_values_iterator) \ F(ErrorPrototype, initial_error_prototype) \ F(IteratorPrototype, initial_iterator_prototype) \ F(ObjProto_valueOf, object_value_of_function) enum Intrinsic { #define V8_DECL_INTRINSIC(name, iname) k##name, V8_INTRINSICS_LIST(V8_DECL_INTRINSIC) #undef V8_DECL_INTRINSIC }; // --- Templates --- /** * The superclass of object and function templates. */ class V8_EXPORT Template : public Data { public: /** * Adds a property to each instance created by this template. * * The property must be defined either as a primitive value, or a template. */ void Set(Local<Name> name, Local<Data> value, PropertyAttribute attributes = None); void SetPrivate(Local<Private> name, Local<Data> value, PropertyAttribute attributes = None); V8_INLINE void Set(Isolate* isolate, const char* name, Local<Data> value); void SetAccessorProperty( Local<Name> name, Local<FunctionTemplate> getter = Local<FunctionTemplate>(), Local<FunctionTemplate> setter = Local<FunctionTemplate>(), PropertyAttribute attribute = None, AccessControl settings = DEFAULT); /** * Whenever the property with the given name is accessed on objects * created from this Template the getter and setter callbacks * are called instead of getting and setting the property directly * on the JavaScript object. * * \param name The name of the property for which an accessor is added. * \param getter The callback to invoke when getting the property. * \param setter The callback to invoke when setting the property. * \param data A piece of data that will be passed to the getter and setter * callbacks whenever they are invoked. * \param settings Access control settings for the accessor. This is a bit * field consisting of one of more of * DEFAULT = 0, ALL_CAN_READ = 1, or ALL_CAN_WRITE = 2. * The default is to not allow cross-context access. * ALL_CAN_READ means that all cross-context reads are allowed. * ALL_CAN_WRITE means that all cross-context writes are allowed. * The combination ALL_CAN_READ | ALL_CAN_WRITE can be used to allow all * cross-context access. * \param attribute The attributes of the property for which an accessor * is added. * \param signature The signature describes valid receivers for the accessor * and is used to perform implicit instance checks against them. If the * receiver is incompatible (i.e. is not an instance of the constructor as * defined by FunctionTemplate::HasInstance()), an implicit TypeError is * thrown and no callback is invoked. */ void SetNativeDataProperty( Local<String> name, AccessorGetterCallback getter, AccessorSetterCallback setter = nullptr, // TODO(dcarney): gcc can't handle Local below Local<Value> data = Local<Value>(), PropertyAttribute attribute = None, Local<AccessorSignature> signature = Local<AccessorSignature>(), AccessControl settings = DEFAULT, SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); void SetNativeDataProperty( Local<Name> name, AccessorNameGetterCallback getter, AccessorNameSetterCallback setter = nullptr, // TODO(dcarney): gcc can't handle Local below Local<Value> data = Local<Value>(), PropertyAttribute attribute = None, Local<AccessorSignature> signature = Local<AccessorSignature>(), AccessControl settings = DEFAULT, SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); /** * Like SetNativeDataProperty, but V8 will replace the native data property * with a real data property on first access. */ void SetLazyDataProperty( Local<Name> name, AccessorNameGetterCallback getter, Local<Value> data = Local<Value>(), PropertyAttribute attribute = None, SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); /** * During template instantiation, sets the value with the intrinsic property * from the correct context. */ void SetIntrinsicDataProperty(Local<Name> name, Intrinsic intrinsic, PropertyAttribute attribute = None); private: Template(); friend class ObjectTemplate; friend class FunctionTemplate; }; // TODO(dcarney): Replace GenericNamedPropertyFooCallback with just // NamedPropertyFooCallback. /** * Interceptor for get requests on an object. * * Use `info.GetReturnValue().Set()` to set the return value of the * intercepted get request. * * \param property The name of the property for which the request was * intercepted. * \param info Information about the intercepted request, such as * isolate, receiver, return value, or whether running in `'use strict`' mode. * See `PropertyCallbackInfo`. * * \code * void GetterCallback( * Local<Name> name, * const v8::PropertyCallbackInfo<v8::Value>& info) { * info.GetReturnValue().Set(v8_num(42)); * } * * v8::Local<v8::FunctionTemplate> templ = * v8::FunctionTemplate::New(isolate); * templ->InstanceTemplate()->SetHandler( * v8::NamedPropertyHandlerConfiguration(GetterCallback)); * LocalContext env; * env->Global() * ->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local()) * .ToLocalChecked() * ->NewInstance(env.local()) * .ToLocalChecked()) * .FromJust(); * v8::Local<v8::Value> result = CompileRun("obj.a = 17; obj.a"); * CHECK(v8_num(42)->Equals(env.local(), result).FromJust()); * \endcode * * See also `ObjectTemplate::SetHandler`. */ typedef void (*GenericNamedPropertyGetterCallback)( Local<Name> property, const PropertyCallbackInfo<Value>& info); /** * Interceptor for set requests on an object. * * Use `info.GetReturnValue()` to indicate whether the request was intercepted * or not. If the setter successfully intercepts the request, i.e., if the * request should not be further executed, call * `info.GetReturnValue().Set(value)`. If the setter * did not intercept the request, i.e., if the request should be handled as * if no interceptor is present, do not not call `Set()`. * * \param property The name of the property for which the request was * intercepted. * \param value The value which the property will have if the request * is not intercepted. * \param info Information about the intercepted request, such as * isolate, receiver, return value, or whether running in `'use strict'` mode. * See `PropertyCallbackInfo`. * * See also * `ObjectTemplate::SetHandler.` */ typedef void (*GenericNamedPropertySetterCallback)( Local<Name> property, Local<Value> value, const PropertyCallbackInfo<Value>& info); /** * Intercepts all requests that query the attributes of the * property, e.g., getOwnPropertyDescriptor(), propertyIsEnumerable(), and * defineProperty(). * * Use `info.GetReturnValue().Set(value)` to set the property attributes. The * value is an integer encoding a `v8::PropertyAttribute`. * * \param property The name of the property for which the request was * intercepted. * \param info Information about the intercepted request, such as * isolate, receiver, return value, or whether running in `'use strict'` mode. * See `PropertyCallbackInfo`. * * \note Some functions query the property attributes internally, even though * they do not return the attributes. For example, `hasOwnProperty()` can * trigger this interceptor depending on the state of the object. * * See also * `ObjectTemplate::SetHandler.` */ typedef void (*GenericNamedPropertyQueryCallback)( Local<Name> property, const PropertyCallbackInfo<Integer>& info); /** * Interceptor for delete requests on an object. * * Use `info.GetReturnValue()` to indicate whether the request was intercepted * or not. If the deleter successfully intercepts the request, i.e., if the * request should not be further executed, call * `info.GetReturnValue().Set(value)` with a boolean `value`. The `value` is * used as the return value of `delete`. * * \param property The name of the property for which the request was * intercepted. * \param info Information about the intercepted request, such as * isolate, receiver, return value, or whether running in `'use strict'` mode. * See `PropertyCallbackInfo`. * * \note If you need to mimic the behavior of `delete`, i.e., throw in strict * mode instead of returning false, use `info.ShouldThrowOnError()` to determine * if you are in strict mode. * * See also `ObjectTemplate::SetHandler.` */ typedef void (*GenericNamedPropertyDeleterCallback)( Local<Name> property, const PropertyCallbackInfo<Boolean>& info); /** * Returns an array containing the names of the properties the named * property getter intercepts. * * Note: The values in the array must be of type v8::Name. */ typedef void (*GenericNamedPropertyEnumeratorCallback)( const PropertyCallbackInfo<Array>& info); /** * Interceptor for defineProperty requests on an object. * * Use `info.GetReturnValue()` to indicate whether the request was intercepted * or not. If the definer successfully intercepts the request, i.e., if the * request should not be further executed, call * `info.GetReturnValue().Set(value)`. If the definer * did not intercept the request, i.e., if the request should be handled as * if no interceptor is present, do not not call `Set()`. * * \param property The name of the property for which the request was * intercepted. * \param desc The property descriptor which is used to define the * property if the request is not intercepted. * \param info Information about the intercepted request, such as * isolate, receiver, return value, or whether running in `'use strict'` mode. * See `PropertyCallbackInfo`. * * See also `ObjectTemplate::SetHandler`. */ typedef void (*GenericNamedPropertyDefinerCallback)( Local<Name> property, const PropertyDescriptor& desc, const PropertyCallbackInfo<Value>& info); /** * Interceptor for getOwnPropertyDescriptor requests on an object. * * Use `info.GetReturnValue().Set()` to set the return value of the * intercepted request. The return value must be an object that * can be converted to a PropertyDescriptor, e.g., a `v8::value` returned from * `v8::Object::getOwnPropertyDescriptor`. * * \param property The name of the property for which the request was * intercepted. * \info Information about the intercepted request, such as * isolate, receiver, return value, or whether running in `'use strict'` mode. * See `PropertyCallbackInfo`. * * \note If GetOwnPropertyDescriptor is intercepted, it will * always return true, i.e., indicate that the property was found. * * See also `ObjectTemplate::SetHandler`. */ typedef void (*GenericNamedPropertyDescriptorCallback)( Local<Name> property, const PropertyCallbackInfo<Value>& info); /** * See `v8::GenericNamedPropertyGetterCallback`. */ typedef void (*IndexedPropertyGetterCallback)( uint32_t index, const PropertyCallbackInfo<Value>& info); /** * See `v8::GenericNamedPropertySetterCallback`. */ typedef void (*IndexedPropertySetterCallback)( uint32_t index, Local<Value> value, const PropertyCallbackInfo<Value>& info); /** * See `v8::GenericNamedPropertyQueryCallback`. */ typedef void (*IndexedPropertyQueryCallback)( uint32_t index, const PropertyCallbackInfo<Integer>& info); /** * See `v8::GenericNamedPropertyDeleterCallback`. */ typedef void (*IndexedPropertyDeleterCallback)( uint32_t index, const PropertyCallbackInfo<Boolean>& info); /** * Returns an array containing the indices of the properties the indexed * property getter intercepts. * * Note: The values in the array must be uint32_t. */ typedef void (*IndexedPropertyEnumeratorCallback)( const PropertyCallbackInfo<Array>& info); /** * See `v8::GenericNamedPropertyDefinerCallback`. */ typedef void (*IndexedPropertyDefinerCallback)( uint32_t index, const PropertyDescriptor& desc, const PropertyCallbackInfo<Value>& info); /** * See `v8::GenericNamedPropertyDescriptorCallback`. */ typedef void (*IndexedPropertyDescriptorCallback)( uint32_t index, const PropertyCallbackInfo<Value>& info); /** * Access type specification. */ enum AccessType { ACCESS_GET, ACCESS_SET, ACCESS_HAS, ACCESS_DELETE, ACCESS_KEYS }; /** * Returns true if the given context should be allowed to access the given * object. */ typedef bool (*AccessCheckCallback)(Local<Context> accessing_context, Local<Object> accessed_object, Local<Value> data); class CFunction; /** * A FunctionTemplate is used to create functions at runtime. There * can only be one function created from a FunctionTemplate in a * context. The lifetime of the created function is equal to the * lifetime of the context. So in case the embedder needs to create * temporary functions that can be collected using Scripts is * preferred. * * Any modification of a FunctionTemplate after first instantiation will trigger * a crash. * * A FunctionTemplate can have properties, these properties are added to the * function object when it is created. * * A FunctionTemplate has a corresponding instance template which is * used to create object instances when the function is used as a * constructor. Properties added to the instance template are added to * each object instance. * * A FunctionTemplate can have a prototype template. The prototype template * is used to create the prototype object of the function. * * The following example shows how to use a FunctionTemplate: * * \code * v8::Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New(isolate); * t->Set(isolate, "func_property", v8::Number::New(isolate, 1)); * * v8::Local<v8::Template> proto_t = t->PrototypeTemplate(); * proto_t->Set(isolate, * "proto_method", * v8::FunctionTemplate::New(isolate, InvokeCallback)); * proto_t->Set(isolate, "proto_const", v8::Number::New(isolate, 2)); * * v8::Local<v8::ObjectTemplate> instance_t = t->InstanceTemplate(); * instance_t->SetAccessor( String::NewFromUtf8Literal(isolate, "instance_accessor"), * InstanceAccessorCallback); * instance_t->SetHandler( * NamedPropertyHandlerConfiguration(PropertyHandlerCallback)); * instance_t->Set(String::NewFromUtf8Literal(isolate, "instance_property"), * Number::New(isolate, 3)); * * v8::Local<v8::Function> function = t->GetFunction(); * v8::Local<v8::Object> instance = function->NewInstance(); * \endcode * * Let's use "function" as the JS variable name of the function object * and "instance" for the instance object created above. The function * and the instance will have the following properties: * * \code * func_property in function == true; * function.func_property == 1; * * function.prototype.proto_method() invokes 'InvokeCallback' * function.prototype.proto_const == 2; * * instance instanceof function == true; * instance.instance_accessor calls 'InstanceAccessorCallback' * instance.instance_property == 3; * \endcode * * A FunctionTemplate can inherit from another one by calling the * FunctionTemplate::Inherit method. The following graph illustrates * the semantics of inheritance: * * \code * FunctionTemplate Parent -> Parent() . prototype -> { } * ^ ^ * | Inherit(Parent) | .__proto__ * | | * FunctionTemplate Child -> Child() . prototype -> { } * \endcode * * A FunctionTemplate 'Child' inherits from 'Parent', the prototype * object of the Child() function has __proto__ pointing to the * Parent() function's prototype object. An instance of the Child * function has all properties on Parent's instance templates. * * Let Parent be the FunctionTemplate initialized in the previous * section and create a Child FunctionTemplate by: * * \code * Local<FunctionTemplate> parent = t; * Local<FunctionTemplate> child = FunctionTemplate::New(); * child->Inherit(parent); * * Local<Function> child_function = child->GetFunction(); * Local<Object> child_instance = child_function->NewInstance(); * \endcode * * The Child function and Child instance will have the following * properties: * * \code * child_func.prototype.__proto__ == function.prototype; * child_instance.instance_accessor calls 'InstanceAccessorCallback' * child_instance.instance_property == 3; * \endcode * * The additional 'c_function' parameter refers to a fast API call, which * must not trigger GC or JavaScript execution, or call into V8 in other * ways. For more information how to define them, see * include/v8-fast-api-calls.h. Please note that this feature is still * experimental. */ class V8_EXPORT FunctionTemplate : public Template { public: /** Creates a function template.*/ static Local<FunctionTemplate> New( Isolate* isolate, FunctionCallback callback = nullptr, Local<Value> data = Local<Value>(), Local<Signature> signature = Local<Signature>(), int length = 0, ConstructorBehavior behavior = ConstructorBehavior::kAllow, SideEffectType side_effect_type = SideEffectType::kHasSideEffect, const CFunction* c_function = nullptr); /** * Creates a function template backed/cached by a private property. */ static Local<FunctionTemplate> NewWithCache( Isolate* isolate, FunctionCallback callback, Local<Private> cache_property, Local<Value> data = Local<Value>(), Local<Signature> signature = Local<Signature>(), int length = 0, SideEffectType side_effect_type = SideEffectType::kHasSideEffect); /** Returns the unique function instance in the current execution context.*/ V8_WARN_UNUSED_RESULT MaybeLocal<Function> GetFunction( Local<Context> context); /** * Similar to Context::NewRemoteContext, this creates an instance that * isn't backed by an actual object. * * The InstanceTemplate of this FunctionTemplate must have access checks with * handlers installed. */ V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewRemoteInstance(); /** * Set the call-handler callback for a FunctionTemplate. This * callback is called whenever the function created from this * FunctionTemplate is called. The 'c_function' represents a fast * API call, see the comment above the class declaration. */ void SetCallHandler( FunctionCallback callback, Local<Value> data = Local<Value>(), SideEffectType side_effect_type = SideEffectType::kHasSideEffect, const CFunction* c_function = nullptr); /** Set the predefined length property for the FunctionTemplate. */ void SetLength(int length); /** Get the InstanceTemplate. */ Local<ObjectTemplate> InstanceTemplate(); /** * Causes the function template to inherit from a parent function template. * This means the function's prototype.__proto__ is set to the parent * function's prototype. **/ void Inherit(Local<FunctionTemplate> parent); /** * A PrototypeTemplate is the template used to create the prototype object * of the function created by this template. */ Local<ObjectTemplate> PrototypeTemplate(); /** * A PrototypeProviderTemplate is another function template whose prototype * property is used for this template. This is mutually exclusive with setting * a prototype template indirectly by calling PrototypeTemplate() or using * Inherit(). **/ void SetPrototypeProviderTemplate(Local<FunctionTemplate> prototype_provider); /** * Set the class name of the FunctionTemplate. This is used for * printing objects created with the function created from the * FunctionTemplate as its constructor. */ void SetClassName(Local<String> name); /** * When set to true, no access check will be performed on the receiver of a * function call. Currently defaults to true, but this is subject to change. */ void SetAcceptAnyReceiver(bool value); /** * Sets the ReadOnly flag in the attributes of the 'prototype' property * of functions created from this FunctionTemplate to true. */ void ReadOnlyPrototype(); /** * Removes the prototype property from functions created from this * FunctionTemplate. */ void RemovePrototype(); /** * Returns true if the given object is an instance of this function * template. */ bool HasInstance(Local<Value> object); V8_INLINE static FunctionTemplate* Cast(Data* data); private: FunctionTemplate(); static void CheckCast(Data* that); friend class Context; friend class ObjectTemplate; }; /** * Configuration flags for v8::NamedPropertyHandlerConfiguration or * v8::IndexedPropertyHandlerConfiguration. */ enum class PropertyHandlerFlags { /** * None. */ kNone = 0, /** * See ALL_CAN_READ above. */ kAllCanRead = 1, /** Will not call into interceptor for properties on the receiver or prototype * chain, i.e., only call into interceptor for properties that do not exist. * Currently only valid for named interceptors. */ kNonMasking = 1 << 1, /** * Will not call into interceptor for symbol lookup. Only meaningful for * named interceptors. */ kOnlyInterceptStrings = 1 << 2, /** * The getter, query, enumerator callbacks do not produce side effects. */ kHasNoSideEffect = 1 << 3, }; struct NamedPropertyHandlerConfiguration { NamedPropertyHandlerConfiguration( GenericNamedPropertyGetterCallback getter, GenericNamedPropertySetterCallback setter, GenericNamedPropertyQueryCallback query, GenericNamedPropertyDeleterCallback deleter, GenericNamedPropertyEnumeratorCallback enumerator, GenericNamedPropertyDefinerCallback definer, GenericNamedPropertyDescriptorCallback descriptor, Local<Value> data = Local<Value>(), PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)  : getter(getter), setter(setter), query(query), deleter(deleter), enumerator(enumerator), definer(definer), descriptor(descriptor), data(data), flags(flags) {} NamedPropertyHandlerConfiguration( /** Note: getter is required */ GenericNamedPropertyGetterCallback getter = nullptr, GenericNamedPropertySetterCallback setter = nullptr, GenericNamedPropertyQueryCallback query = nullptr, GenericNamedPropertyDeleterCallback deleter = nullptr, GenericNamedPropertyEnumeratorCallback enumerator = nullptr, Local<Value> data = Local<Value>(), PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)  : getter(getter), setter(setter), query(query), deleter(deleter), enumerator(enumerator), definer(nullptr), descriptor(nullptr), data(data), flags(flags) {} NamedPropertyHandlerConfiguration( GenericNamedPropertyGetterCallback getter, GenericNamedPropertySetterCallback setter, GenericNamedPropertyDescriptorCallback descriptor, GenericNamedPropertyDeleterCallback deleter, GenericNamedPropertyEnumeratorCallback enumerator, GenericNamedPropertyDefinerCallback definer, Local<Value> data = Local<Value>(), PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)  : getter(getter), setter(setter), query(nullptr), deleter(deleter), enumerator(enumerator), definer(definer), descriptor(descriptor), data(data), flags(flags) {} GenericNamedPropertyGetterCallback getter; GenericNamedPropertySetterCallback setter; GenericNamedPropertyQueryCallback query; GenericNamedPropertyDeleterCallback deleter; GenericNamedPropertyEnumeratorCallback enumerator; GenericNamedPropertyDefinerCallback definer; GenericNamedPropertyDescriptorCallback descriptor; Local<Value> data; PropertyHandlerFlags flags; }; struct IndexedPropertyHandlerConfiguration { IndexedPropertyHandlerConfiguration( IndexedPropertyGetterCallback getter, IndexedPropertySetterCallback setter, IndexedPropertyQueryCallback query, IndexedPropertyDeleterCallback deleter, IndexedPropertyEnumeratorCallback enumerator, IndexedPropertyDefinerCallback definer, IndexedPropertyDescriptorCallback descriptor, Local<Value> data = Local<Value>(), PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)  : getter(getter), setter(setter), query(query), deleter(deleter), enumerator(enumerator), definer(definer), descriptor(descriptor), data(data), flags(flags) {} IndexedPropertyHandlerConfiguration( /** Note: getter is required */ IndexedPropertyGetterCallback getter = nullptr, IndexedPropertySetterCallback setter = nullptr, IndexedPropertyQueryCallback query = nullptr, IndexedPropertyDeleterCallback deleter = nullptr, IndexedPropertyEnumeratorCallback enumerator = nullptr, Local<Value> data = Local<Value>(), PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)  : getter(getter), setter(setter), query(query), deleter(deleter), enumerator(enumerator), definer(nullptr), descriptor(nullptr), data(data), flags(flags) {} IndexedPropertyHandlerConfiguration( IndexedPropertyGetterCallback getter, IndexedPropertySetterCallback setter, IndexedPropertyDescriptorCallback descriptor, IndexedPropertyDeleterCallback deleter, IndexedPropertyEnumeratorCallback enumerator, IndexedPropertyDefinerCallback definer, Local<Value> data = Local<Value>(), PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)  : getter(getter), setter(setter), query(nullptr), deleter(deleter), enumerator(enumerator), definer(definer), descriptor(descriptor), data(data), flags(flags) {} IndexedPropertyGetterCallback getter; IndexedPropertySetterCallback setter; IndexedPropertyQueryCallback query; IndexedPropertyDeleterCallback deleter; IndexedPropertyEnumeratorCallback enumerator; IndexedPropertyDefinerCallback definer; IndexedPropertyDescriptorCallback descriptor; Local<Value> data; PropertyHandlerFlags flags; }; /** * An ObjectTemplate is used to create objects at runtime. * * Properties added to an ObjectTemplate are added to each object * created from the ObjectTemplate. */ class V8_EXPORT ObjectTemplate : public Template { public: /** Creates an ObjectTemplate. */ static Local<ObjectTemplate> New( Isolate* isolate, Local<FunctionTemplate> constructor = Local<FunctionTemplate>()); /** Creates a new instance of this template.*/ V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance(Local<Context> context); /** * Sets an accessor on the object template. * * Whenever the property with the given name is accessed on objects * created from this ObjectTemplate the getter and setter callbacks * are called instead of getting and setting the property directly * on the JavaScript object. * * \param name The name of the property for which an accessor is added. * \param getter The callback to invoke when getting the property. * \param setter The callback to invoke when setting the property. * \param data A piece of data that will be passed to the getter and setter * callbacks whenever they are invoked. * \param settings Access control settings for the accessor. This is a bit * field consisting of one of more of * DEFAULT = 0, ALL_CAN_READ = 1, or ALL_CAN_WRITE = 2. * The default is to not allow cross-context access. * ALL_CAN_READ means that all cross-context reads are allowed. * ALL_CAN_WRITE means that all cross-context writes are allowed. * The combination ALL_CAN_READ | ALL_CAN_WRITE can be used to allow all * cross-context access. * \param attribute The attributes of the property for which an accessor * is added. * \param signature The signature describes valid receivers for the accessor * and is used to perform implicit instance checks against them. If the * receiver is incompatible (i.e. is not an instance of the constructor as * defined by FunctionTemplate::HasInstance()), an implicit TypeError is * thrown and no callback is invoked. */ void SetAccessor( Local<String> name, AccessorGetterCallback getter, AccessorSetterCallback setter = nullptr, Local<Value> data = Local<Value>(), AccessControl settings = DEFAULT, PropertyAttribute attribute = None, Local<AccessorSignature> signature = Local<AccessorSignature>(), SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); void SetAccessor( Local<Name> name, AccessorNameGetterCallback getter, AccessorNameSetterCallback setter = nullptr, Local<Value> data = Local<Value>(), AccessControl settings = DEFAULT, PropertyAttribute attribute = None, Local<AccessorSignature> signature = Local<AccessorSignature>(), SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect, SideEffectType setter_side_effect_type = SideEffectType::kHasSideEffect); /** * Sets a named property handler on the object template. * * Whenever a property whose name is a string or a symbol is accessed on * objects created from this object template, the provided callback is * invoked instead of accessing the property directly on the JavaScript * object. * * @param configuration The NamedPropertyHandlerConfiguration that defines the * callbacks to invoke when accessing a property. */ void SetHandler(const NamedPropertyHandlerConfiguration& configuration); /** * Sets an indexed property handler on the object template. * * Whenever an indexed property is accessed on objects created from * this object template, the provided callback is invoked instead of * accessing the property directly on the JavaScript object. * * \param getter The callback to invoke when getting a property. * \param setter The callback to invoke when setting a property. * \param query The callback to invoke to check if an object has a property. * \param deleter The callback to invoke when deleting a property. * \param enumerator The callback to invoke to enumerate all the indexed * properties of an object. * \param data A piece of data that will be passed to the callbacks * whenever they are invoked. */ // TODO(dcarney): deprecate void SetIndexedPropertyHandler( IndexedPropertyGetterCallback getter, IndexedPropertySetterCallback setter = nullptr, IndexedPropertyQueryCallback query = nullptr, IndexedPropertyDeleterCallback deleter = nullptr, IndexedPropertyEnumeratorCallback enumerator = nullptr, Local<Value> data = Local<Value>()) { SetHandler(IndexedPropertyHandlerConfiguration(getter, setter, query, deleter, enumerator, data)); } /** * Sets an indexed property handler on the object template. * * Whenever an indexed property is accessed on objects created from * this object template, the provided callback is invoked instead of * accessing the property directly on the JavaScript object. * * @param configuration The IndexedPropertyHandlerConfiguration that defines * the callbacks to invoke when accessing a property. */ void SetHandler(const IndexedPropertyHandlerConfiguration& configuration); /** * Sets the callback to be used when calling instances created from * this template as a function. If no callback is set, instances * behave like normal JavaScript objects that cannot be called as a * function. */ void SetCallAsFunctionHandler(FunctionCallback callback, Local<Value> data = Local<Value>()); /** * Mark object instances of the template as undetectable. * * In many ways, undetectable objects behave as though they are not * there. They behave like 'undefined' in conditionals and when * printed. However, properties can be accessed and called as on * normal objects. */ void MarkAsUndetectable(); /** * Sets access check callback on the object template and enables access * checks. * * When accessing properties on instances of this object template, * the access check callback will be called to determine whether or * not to allow cross-context access to the properties. */ void SetAccessCheckCallback(AccessCheckCallback callback, Local<Value> data = Local<Value>()); /** * Like SetAccessCheckCallback but invokes an interceptor on failed access * checks instead of looking up all-can-read properties. You can only use * either this method or SetAccessCheckCallback, but not both at the same * time. */ void SetAccessCheckCallbackAndHandler( AccessCheckCallback callback, const NamedPropertyHandlerConfiguration& named_handler, const IndexedPropertyHandlerConfiguration& indexed_handler, Local<Value> data = Local<Value>()); /** * Gets the number of internal fields for objects generated from * this template. */ int InternalFieldCount(); /** * Sets the number of internal fields for objects generated from * this template. */ void SetInternalFieldCount(int value); /** * Returns true if the object will be an immutable prototype exotic object. */ bool IsImmutableProto(); /** * Makes the ObjectTemplate for an immutable prototype exotic object, with an * immutable __proto__. */ void SetImmutableProto(); V8_INLINE static ObjectTemplate* Cast(Data* data); private: ObjectTemplate(); static Local<ObjectTemplate> New(internal::Isolate* isolate, Local<FunctionTemplate> constructor); static void CheckCast(Data* that); friend class FunctionTemplate; }; /** * A Signature specifies which receiver is valid for a function. * * A receiver matches a given signature if the receiver (or any of its * hidden prototypes) was created from the signature's FunctionTemplate, or * from a FunctionTemplate that inherits directly or indirectly from the * signature's FunctionTemplate. */ class V8_EXPORT Signature : public Data { public: static Local<Signature> New( Isolate* isolate, Local<FunctionTemplate> receiver = Local<FunctionTemplate>()); V8_INLINE static Signature* Cast(Data* data); private: Signature(); static void CheckCast(Data* that); }; /** * An AccessorSignature specifies which receivers are valid parameters * to an accessor callback. */ class V8_EXPORT AccessorSignature : public Data { public: static Local<AccessorSignature> New( Isolate* isolate, Local<FunctionTemplate> receiver = Local<FunctionTemplate>()); V8_INLINE static AccessorSignature* Cast(Data* data); private: AccessorSignature(); static void CheckCast(Data* that); }; // --- Extensions --- /** * Ignore */ class V8_EXPORT Extension { // NOLINT public: // Note that the strings passed into this constructor must live as long // as the Extension itself. Extension(const char* name, const char* source = nullptr, int dep_count = 0, const char** deps = nullptr, int source_length = -1); virtual ~Extension() { delete source_; } virtual Local<FunctionTemplate> GetNativeFunctionTemplate( Isolate* isolate, Local<String> name) { return Local<FunctionTemplate>(); } const char* name() const { return name_; } size_t source_length() const { return source_length_; } const String::ExternalOneByteStringResource* source() const { return source_; } int dependency_count() const { return dep_count_; } const char** dependencies() const { return deps_; } void set_auto_enable(bool value) { auto_enable_ = value; } bool auto_enable() { return auto_enable_; } // Disallow copying and assigning. Extension(const Extension&) = delete; void operator=(const Extension&) = delete; private: const char* name_; size_t source_length_; // expected to initialize before source_ String::ExternalOneByteStringResource* source_; int dep_count_; const char** deps_; bool auto_enable_; }; void V8_EXPORT RegisterExtension(std::unique_ptr<Extension>); // --- Statics --- V8_INLINE Local<Primitive> Undefined(Isolate* isolate); V8_INLINE Local<Primitive> Null(Isolate* isolate); V8_INLINE Local<Boolean> True(Isolate* isolate); V8_INLINE Local<Boolean> False(Isolate* isolate); /** * A set of constraints that specifies the limits of the runtime's memory use. * You must set the heap size before initializing the VM - the size cannot be * adjusted after the VM is initialized. * * If you are using threads then you should hold the V8::Locker lock while * setting the stack limit and you must set a non-default stack limit separately * for each thread. * * The arguments for set_max_semi_space_size, set_max_old_space_size, * set_max_executable_size, set_code_range_size specify limits in MB. * * The argument for set_max_semi_space_size_in_kb is in KB. */ class V8_EXPORT ResourceConstraints { public: /** * Configures the constraints with reasonable default values based on the * provided heap size limit. The heap size includes both the young and * the old generation. * * \param initial_heap_size_in_bytes The initial heap size or zero. * By default V8 starts with a small heap and dynamically grows it to * match the set of live objects. This may lead to ineffective * garbage collections at startup if the live set is large. * Setting the initial heap size avoids such garbage collections. * Note that this does not affect young generation garbage collections. * * \param maximum_heap_size_in_bytes The hard limit for the heap size. * When the heap size approaches this limit, V8 will perform series of * garbage collections and invoke the NearHeapLimitCallback. If the garbage * collections do not help and the callback does not increase the limit, * then V8 will crash with V8::FatalProcessOutOfMemory. */ void ConfigureDefaultsFromHeapSize(size_t initial_heap_size_in_bytes, size_t maximum_heap_size_in_bytes); /** * Configures the constraints with reasonable default values based on the * capabilities of the current device the VM is running on. * * \param physical_memory The total amount of physical memory on the current * device, in bytes. * \param virtual_memory_limit The amount of virtual memory on the current * device, in bytes, or zero, if there is no limit. */ void ConfigureDefaults(uint64_t physical_memory, uint64_t virtual_memory_limit); /** * The address beyond which the VM's stack may not grow. */ uint32_t* stack_limit() const { return stack_limit_; } void set_stack_limit(uint32_t* value) { stack_limit_ = value; } /** * The amount of virtual memory reserved for generated code. This is relevant * for 64-bit architectures that rely on code range for calls in code. */ size_t code_range_size_in_bytes() const { return code_range_size_; } void set_code_range_size_in_bytes(size_t limit) { code_range_size_ = limit; } /** * The maximum size of the old generation. * When the old generation approaches this limit, V8 will perform series of * garbage collections and invoke the NearHeapLimitCallback. * If the garbage collections do not help and the callback does not * increase the limit, then V8 will crash with V8::FatalProcessOutOfMemory. */ size_t max_old_generation_size_in_bytes() const { return max_old_generation_size_; } void set_max_old_generation_size_in_bytes(size_t limit) { max_old_generation_size_ = limit; } /** * The maximum size of the young generation, which consists of two semi-spaces * and a large object space. This affects frequency of Scavenge garbage * collections and should be typically much smaller that the old generation. */ size_t max_young_generation_size_in_bytes() const { return max_young_generation_size_; } void set_max_young_generation_size_in_bytes(size_t limit) { max_young_generation_size_ = limit; } size_t initial_old_generation_size_in_bytes() const { return initial_old_generation_size_; } void set_initial_old_generation_size_in_bytes(size_t initial_size) { initial_old_generation_size_ = initial_size; } size_t initial_young_generation_size_in_bytes() const { return initial_young_generation_size_; } void set_initial_young_generation_size_in_bytes(size_t initial_size) { initial_young_generation_size_ = initial_size; } /** * Deprecated functions. Do not use in new code. */ V8_DEPRECATE_SOON("Use code_range_size_in_bytes.") size_t code_range_size() const { return code_range_size_ / kMB; } V8_DEPRECATE_SOON("Use set_code_range_size_in_bytes.") void set_code_range_size(size_t limit_in_mb) { code_range_size_ = limit_in_mb * kMB; } V8_DEPRECATE_SOON("Use max_young_generation_size_in_bytes.") size_t max_semi_space_size_in_kb() const; V8_DEPRECATE_SOON("Use set_max_young_generation_size_in_bytes.") void set_max_semi_space_size_in_kb(size_t limit_in_kb); V8_DEPRECATE_SOON("Use max_old_generation_size_in_bytes.") size_t max_old_space_size() const { return max_old_generation_size_ / kMB; } V8_DEPRECATE_SOON("Use set_max_old_generation_size_in_bytes.") void set_max_old_space_size(size_t limit_in_mb) { max_old_generation_size_ = limit_in_mb * kMB; } V8_DEPRECATE_SOON("Zone does not pool memory any more.") size_t max_zone_pool_size() const { return max_zone_pool_size_; } V8_DEPRECATE_SOON("Zone does not pool memory any more.") void set_max_zone_pool_size(size_t bytes) { max_zone_pool_size_ = bytes; } private: static constexpr size_t kMB = 1048576u; size_t code_range_size_ = 0; size_t max_old_generation_size_ = 0; size_t max_young_generation_size_ = 0; size_t max_zone_pool_size_ = 0; size_t initial_old_generation_size_ = 0; size_t initial_young_generation_size_ = 0; uint32_t* stack_limit_ = nullptr; }; // --- Exceptions --- typedef void (*FatalErrorCallback)(const char* location, const char* message); typedef void (*OOMErrorCallback)(const char* location, bool is_heap_oom); typedef void (*DcheckErrorCallback)(const char* file, int line, const char* message); typedef void (*MessageCallback)(Local<Message> message, Local<Value> data); // --- Tracing --- typedef void (*LogEventCallback)(const char* name, int event); /** * Create new error objects by calling the corresponding error object * constructor with the message. */ class V8_EXPORT Exception { public: static Local<Value> RangeError(Local<String> message); static Local<Value> ReferenceError(Local<String> message); static Local<Value> SyntaxError(Local<String> message); static Local<Value> TypeError(Local<String> message); static Local<Value> WasmCompileError(Local<String> message); static Local<Value> WasmLinkError(Local<String> message); static Local<Value> WasmRuntimeError(Local<String> message); static Local<Value> Error(Local<String> message); /** * Creates an error message for the given exception. * Will try to reconstruct the original stack trace from the exception value, * or capture the current stack trace if not available. */ static Local<Message> CreateMessage(Isolate* isolate, Local<Value> exception); /** * Returns the original stack trace that was captured at the creation time * of a given exception, or an empty handle if not available. */ static Local<StackTrace> GetStackTrace(Local<Value> exception); }; // --- Counters Callbacks --- typedef int* (*CounterLookupCallback)(const char* name); typedef void* (*CreateHistogramCallback)(const char* name, int min, int max, size_t buckets); typedef void (*AddHistogramSampleCallback)(void* histogram, int sample); // --- Crashkeys Callback --- enum class CrashKeyId { kIsolateAddress, kReadonlySpaceFirstPageAddress, kMapSpaceFirstPageAddress, kCodeSpaceFirstPageAddress, kDumpType, }; typedef void (*AddCrashKeyCallback)(CrashKeyId id, const std::string& value); // --- Enter/Leave Script Callback --- typedef void (*BeforeCallEnteredCallback)(Isolate*); typedef void (*CallCompletedCallback)(Isolate*); /** * HostImportModuleDynamicallyCallback is called when we require the * embedder to load a module. This is used as part of the dynamic * import syntax. * * The referrer contains metadata about the script/module that calls * import. * * The specifier is the name of the module that should be imported. * * The embedder must compile, instantiate, evaluate the Module, and * obtain it's namespace object. * * The Promise returned from this function is forwarded to userland * JavaScript. The embedder must resolve this promise with the module * namespace object. In case of an exception, the embedder must reject * this promise with the exception. If the promise creation itself * fails (e.g. due to stack overflow), the embedder must propagate * that exception by returning an empty MaybeLocal. */ typedef MaybeLocal<Promise> (*HostImportModuleDynamicallyCallback)( Local<Context> context, Local<ScriptOrModule> referrer, Local<String> specifier); /** * HostInitializeImportMetaObjectCallback is called the first time import.meta * is accessed for a module. Subsequent access will reuse the same value. The * callback must not throw. * * The method combines two implementation-defined abstract operations into one: * HostGetImportMetaProperties and HostFinalizeImportMeta. * * The embedder should use v8::Object::CreateDataProperty to add properties on * the meta object. */ typedef void (*HostInitializeImportMetaObjectCallback)(Local<Context> context, Local<Module> module, Local<Object> meta); /** * PrepareStackTraceCallback is called when the stack property of an error is * first accessed. The return value will be used as the stack value. If this * callback is registed, the |Error.prepareStackTrace| API will be disabled. * |sites| is an array of call sites, specified in * https://v8.dev/docs/stack-trace-api */ typedef MaybeLocal<Value> (*PrepareStackTraceCallback)(Local<Context> context, Local<Value> error, Local<Array> sites); /** * PromiseHook with type kInit is called when a new promise is * created. When a new promise is created as part of the chain in the * case of Promise.then or in the intermediate promises created by * Promise.{race, all}/AsyncFunctionAwait, we pass the parent promise * otherwise we pass undefined. * * PromiseHook with type kResolve is called at the beginning of * resolve or reject function defined by CreateResolvingFunctions. * * PromiseHook with type kBefore is called at the beginning of the * PromiseReactionJob. * * PromiseHook with type kAfter is called right at the end of the * PromiseReactionJob. */ enum class PromiseHookType { kInit, kResolve, kBefore, kAfter }; typedef void (*PromiseHook)(PromiseHookType type, Local<Promise> promise, Local<Value> parent); // --- Promise Reject Callback --- enum PromiseRejectEvent { kPromiseRejectWithNoHandler = 0, kPromiseHandlerAddedAfterReject = 1, kPromiseRejectAfterResolved = 2, kPromiseResolveAfterResolved = 3, }; class PromiseRejectMessage { public: PromiseRejectMessage(Local<Promise> promise, PromiseRejectEvent event, Local<Value> value)  : promise_(promise), event_(event), value_(value) {} V8_INLINE Local<Promise> GetPromise() const { return promise_; } V8_INLINE PromiseRejectEvent GetEvent() const { return event_; } V8_INLINE Local<Value> GetValue() const { return value_; } private: Local<Promise> promise_; PromiseRejectEvent event_; Local<Value> value_; }; typedef void (*PromiseRejectCallback)(PromiseRejectMessage message); // --- Microtasks Callbacks --- V8_DEPRECATE_SOON("Use *WithData version.") typedef void (*MicrotasksCompletedCallback)(Isolate*); typedef void (*MicrotasksCompletedCallbackWithData)(Isolate*, void*); typedef void (*MicrotaskCallback)(void* data); /** * Policy for running microtasks: * - explicit: microtasks are invoked with the * Isolate::PerformMicrotaskCheckpoint() method; * - scoped: microtasks invocation is controlled by MicrotasksScope objects; * - auto: microtasks are invoked when the script call depth decrements * to zero. */ enum class MicrotasksPolicy { kExplicit, kScoped, kAuto }; /** * Represents the microtask queue, where microtasks are stored and processed. * https://html.spec.whatwg.org/multipage/webappapis.html#microtask-queue * https://html.spec.whatwg.org/multipage/webappapis.html#enqueuejob(queuename,-job,-arguments) * https://html.spec.whatwg.org/multipage/webappapis.html#perform-a-microtask-checkpoint * * A MicrotaskQueue instance may be associated to multiple Contexts by passing * it to Context::New(), and they can be detached by Context::DetachGlobal(). * The embedder must keep the MicrotaskQueue instance alive until all associated * Contexts are gone or detached. * * Use the same instance of MicrotaskQueue for all Contexts that may access each * other synchronously. E.g. for Web embedding, use the same instance for all * origins that share the same URL scheme and eTLD+1. */ class V8_EXPORT MicrotaskQueue { public: /** * Creates an empty MicrotaskQueue instance. */ static std::unique_ptr<MicrotaskQueue> New( Isolate* isolate, MicrotasksPolicy policy = MicrotasksPolicy::kAuto); virtual ~MicrotaskQueue() = default; /** * Enqueues the callback to the queue. */ virtual void EnqueueMicrotask(Isolate* isolate, Local<Function> microtask) = 0; /** * Enqueues the callback to the queue. */ virtual void EnqueueMicrotask(v8::Isolate* isolate, MicrotaskCallback callback, void* data = nullptr) = 0; /** * Adds a callback to notify the embedder after microtasks were run. The * callback is triggered by explicit RunMicrotasks call or automatic * microtasks execution (see Isolate::SetMicrotasksPolicy). * * Callback will trigger even if microtasks were attempted to run, * but the microtasks queue was empty and no single microtask was actually * executed. * * Executing scripts inside the callback will not re-trigger microtasks and * the callback. */ virtual void AddMicrotasksCompletedCallback( MicrotasksCompletedCallbackWithData callback, void* data = nullptr) = 0; /** * Removes callback that was installed by AddMicrotasksCompletedCallback. */ virtual void RemoveMicrotasksCompletedCallback( MicrotasksCompletedCallbackWithData callback, void* data = nullptr) = 0; /** * Runs microtasks if no microtask is running on this MicrotaskQueue instance. */ virtual void PerformCheckpoint(Isolate* isolate) = 0; /** * Returns true if a microtask is running on this MicrotaskQueue instance. */ virtual bool IsRunningMicrotasks() const = 0; /** * Returns the current depth of nested MicrotasksScope that has * kRunMicrotasks. */ virtual int GetMicrotasksScopeDepth() const = 0; MicrotaskQueue(const MicrotaskQueue&) = delete; MicrotaskQueue& operator=(const MicrotaskQueue&) = delete; private: friend class internal::MicrotaskQueue; MicrotaskQueue() = default; }; /** * This scope is used to control microtasks when MicrotasksPolicy::kScoped * is used on Isolate. In this mode every non-primitive call to V8 should be * done inside some MicrotasksScope. * Microtasks are executed when topmost MicrotasksScope marked as kRunMicrotasks * exits. * kDoNotRunMicrotasks should be used to annotate calls not intended to trigger * microtasks. */ class V8_EXPORT MicrotasksScope { public: enum Type { kRunMicrotasks, kDoNotRunMicrotasks }; MicrotasksScope(Isolate* isolate, Type type); MicrotasksScope(Isolate* isolate, MicrotaskQueue* microtask_queue, Type type); ~MicrotasksScope(); /** * Runs microtasks if no kRunMicrotasks scope is currently active. */ static void PerformCheckpoint(Isolate* isolate); /** * Returns current depth of nested kRunMicrotasks scopes. */ static int GetCurrentDepth(Isolate* isolate); /** * Returns true while microtasks are being executed. */ static bool IsRunningMicrotasks(Isolate* isolate); // Prevent copying. MicrotasksScope(const MicrotasksScope&) = delete; MicrotasksScope& operator=(const MicrotasksScope&) = delete; private: internal::Isolate* const isolate_; internal::MicrotaskQueue* const microtask_queue_; bool run_; }; // --- Failed Access Check Callback --- typedef void (*FailedAccessCheckCallback)(Local<Object> target, AccessType type, Local<Value> data); // --- AllowCodeGenerationFromStrings callbacks --- /** * Callback to check if code generation from strings is allowed. See * Context::AllowCodeGenerationFromStrings. */ typedef bool (*AllowCodeGenerationFromStringsCallback)(Local<Context> context, Local<String> source); struct ModifyCodeGenerationFromStringsResult { // If true, proceed with the codegen algorithm. Otherwise, block it. bool codegen_allowed = false; // Overwrite the original source with this string, if present. // Use the original source if empty. // This field is considered only if codegen_allowed is true. MaybeLocal<String> modified_source; }; /** * Callback to check if codegen is allowed from a source object, and convert * the source to string if necessary.See ModifyCodeGenerationFromStrings. */ typedef ModifyCodeGenerationFromStringsResult ( *ModifyCodeGenerationFromStringsCallback)(Local<Context> context, Local<Value> source); // --- WebAssembly compilation callbacks --- typedef bool (*ExtensionCallback)(const FunctionCallbackInfo<Value>&); typedef bool (*AllowWasmCodeGenerationCallback)(Local<Context> context, Local<String> source); // --- Callback for APIs defined on v8-supported objects, but implemented // by the embedder. Example: WebAssembly.{compile|instantiate}Streaming --- typedef void (*ApiImplementationCallback)(const FunctionCallbackInfo<Value>&); // --- Callback for WebAssembly.compileStreaming --- typedef void (*WasmStreamingCallback)(const FunctionCallbackInfo<Value>&); // --- Callback for checking if WebAssembly threads are enabled --- typedef bool (*WasmThreadsEnabledCallback)(Local<Context> context); // --- Callback for loading source map file for Wasm profiling support typedef Local<String> (*WasmLoadSourceMapCallback)(Isolate* isolate, const char* name); // --- Callback for checking if WebAssembly Simd is enabled --- typedef bool (*WasmSimdEnabledCallback)(Local<Context> context); // --- Garbage Collection Callbacks --- /** * Applications can register callback functions which will be called before and * after certain garbage collection operations. Allocations are not allowed in * the callback functions, you therefore cannot manipulate objects (set or * delete properties for example) since it is possible such operations will * result in the allocation of objects. */ enum GCType { kGCTypeScavenge = 1 << 0, kGCTypeMarkSweepCompact = 1 << 1, kGCTypeIncrementalMarking = 1 << 2, kGCTypeProcessWeakCallbacks = 1 << 3, kGCTypeAll = kGCTypeScavenge | kGCTypeMarkSweepCompact | kGCTypeIncrementalMarking | kGCTypeProcessWeakCallbacks }; /** * GCCallbackFlags is used to notify additional information about the GC * callback. * - kGCCallbackFlagConstructRetainedObjectInfos: The GC callback is for * constructing retained object infos. * - kGCCallbackFlagForced: The GC callback is for a forced GC for testing. * - kGCCallbackFlagSynchronousPhantomCallbackProcessing: The GC callback * is called synchronously without getting posted to an idle task. * - kGCCallbackFlagCollectAllAvailableGarbage: The GC callback is called * in a phase where V8 is trying to collect all available garbage * (e.g., handling a low memory notification). * - kGCCallbackScheduleIdleGarbageCollection: The GC callback is called to * trigger an idle garbage collection. */ enum GCCallbackFlags { kNoGCCallbackFlags = 0, kGCCallbackFlagConstructRetainedObjectInfos = 1 << 1, kGCCallbackFlagForced = 1 << 2, kGCCallbackFlagSynchronousPhantomCallbackProcessing = 1 << 3, kGCCallbackFlagCollectAllAvailableGarbage = 1 << 4, kGCCallbackFlagCollectAllExternalMemory = 1 << 5, kGCCallbackScheduleIdleGarbageCollection = 1 << 6, }; typedef void (*GCCallback)(GCType type, GCCallbackFlags flags); typedef void (*InterruptCallback)(Isolate* isolate, void* data); /** * This callback is invoked when the heap size is close to the heap limit and * V8 is likely to abort with out-of-memory error. * The callback can extend the heap limit by returning a value that is greater * than the current_heap_limit. The initial heap limit is the limit that was * set after heap setup. */ typedef size_t (*NearHeapLimitCallback)(void* data, size_t current_heap_limit, size_t initial_heap_limit); /** * Collection of shared per-process V8 memory information. * * Instances of this class can be passed to * v8::V8::GetSharedMemoryStatistics to get shared memory statistics from V8. */ class V8_EXPORT SharedMemoryStatistics { public: SharedMemoryStatistics(); size_t read_only_space_size() { return read_only_space_size_; } size_t read_only_space_used_size() { return read_only_space_used_size_; } size_t read_only_space_physical_size() { return read_only_space_physical_size_; } private: size_t read_only_space_size_; size_t read_only_space_used_size_; size_t read_only_space_physical_size_; friend class V8; friend class internal::ReadOnlyHeap; }; /** * Collection of V8 heap information. * * Instances of this class can be passed to v8::Isolate::GetHeapStatistics to * get heap statistics from V8. */ class V8_EXPORT HeapStatistics { public: HeapStatistics(); size_t total_heap_size() { return total_heap_size_; } size_t total_heap_size_executable() { return total_heap_size_executable_; } size_t total_physical_size() { return total_physical_size_; } size_t total_available_size() { return total_available_size_; } size_t total_global_handles_size() { return total_global_handles_size_; } size_t used_global_handles_size() { return used_global_handles_size_; } size_t used_heap_size() { return used_heap_size_; } size_t heap_size_limit() { return heap_size_limit_; } size_t malloced_memory() { return malloced_memory_; } size_t external_memory() { return external_memory_; } size_t peak_malloced_memory() { return peak_malloced_memory_; } size_t number_of_native_contexts() { return number_of_native_contexts_; } size_t number_of_detached_contexts() { return number_of_detached_contexts_; } /** * Returns a 0/1 boolean, which signifies whether the V8 overwrite heap * garbage with a bit pattern. */ size_t does_zap_garbage() { return does_zap_garbage_; } private: size_t total_heap_size_; size_t total_heap_size_executable_; size_t total_physical_size_; size_t total_available_size_; size_t used_heap_size_; size_t heap_size_limit_; size_t malloced_memory_; size_t external_memory_; size_t peak_malloced_memory_; bool does_zap_garbage_; size_t number_of_native_contexts_; size_t number_of_detached_contexts_; size_t total_global_handles_size_; size_t used_global_handles_size_; friend class V8; friend class Isolate; }; class V8_EXPORT HeapSpaceStatistics { public: HeapSpaceStatistics(); const char* space_name() { return space_name_; } size_t space_size() { return space_size_; } size_t space_used_size() { return space_used_size_; } size_t space_available_size() { return space_available_size_; } size_t physical_space_size() { return physical_space_size_; } private: const char* space_name_; size_t space_size_; size_t space_used_size_; size_t space_available_size_; size_t physical_space_size_; friend class Isolate; }; class V8_EXPORT HeapObjectStatistics { public: HeapObjectStatistics(); const char* object_type() { return object_type_; } const char* object_sub_type() { return object_sub_type_; } size_t object_count() { return object_count_; } size_t object_size() { return object_size_; } private: const char* object_type_; const char* object_sub_type_; size_t object_count_; size_t object_size_; friend class Isolate; }; class V8_EXPORT HeapCodeStatistics { public: HeapCodeStatistics(); size_t code_and_metadata_size() { return code_and_metadata_size_; } size_t bytecode_and_metadata_size() { return bytecode_and_metadata_size_; } size_t external_script_source_size() { return external_script_source_size_; } private: size_t code_and_metadata_size_; size_t bytecode_and_metadata_size_; size_t external_script_source_size_; friend class Isolate; }; /** * A JIT code event is issued each time code is added, moved or removed. * * \note removal events are not currently issued. */ struct JitCodeEvent { enum EventType { CODE_ADDED, CODE_MOVED, CODE_REMOVED, CODE_ADD_LINE_POS_INFO, CODE_START_LINE_INFO_RECORDING, CODE_END_LINE_INFO_RECORDING }; // Definition of the code position type. The "POSITION" type means the place // in the source code which are of interest when making stack traces to // pin-point the source location of a stack frame as close as possible. // The "STATEMENT_POSITION" means the place at the beginning of each // statement, and is used to indicate possible break locations. enum PositionType { POSITION, STATEMENT_POSITION }; // There are two different kinds of JitCodeEvents, one for JIT code generated // by the optimizing compiler, and one for byte code generated for the // interpreter. For JIT_CODE events, the |code_start| member of the event // points to the beginning of jitted assembly code, while for BYTE_CODE // events, |code_start| points to the first bytecode of the interpreted // function. enum CodeType { BYTE_CODE, JIT_CODE }; // Type of event. EventType type; CodeType code_type; // Start of the instructions. void* code_start; // Size of the instructions. size_t code_len; // Script info for CODE_ADDED event. Local<UnboundScript> script; // User-defined data for *_LINE_INFO_* event. It's used to hold the source // code line information which is returned from the // CODE_START_LINE_INFO_RECORDING event. And it's passed to subsequent // CODE_ADD_LINE_POS_INFO and CODE_END_LINE_INFO_RECORDING events. void* user_data; struct name_t { // Name of the object associated with the code, note that the string is not // zero-terminated. const char* str; // Number of chars in str. size_t len; }; struct line_info_t { // PC offset size_t offset; // Code position size_t pos; // The position type. PositionType position_type; }; struct wasm_source_info_t { // Source file name. const char* filename; // Length of filename. size_t filename_size; // Line number table, which maps offsets of JITted code to line numbers of // source file. const line_info_t* line_number_table; // Number of entries in the line number table. size_t line_number_table_size; }; wasm_source_info_t* wasm_source_info; union { // Only valid for CODE_ADDED. struct name_t name; // Only valid for CODE_ADD_LINE_POS_INFO struct line_info_t line_info; // New location of instructions. Only valid for CODE_MOVED. void* new_code_start; }; Isolate* isolate; }; /** * Option flags passed to the SetRAILMode function. * See documentation https://developers.google.com/web/tools/chrome-devtools/ * profile/evaluate-performance/rail */ enum RAILMode : unsigned { // Response performance mode: In this mode very low virtual machine latency // is provided. V8 will try to avoid JavaScript execution interruptions. // Throughput may be throttled. PERFORMANCE_RESPONSE, // Animation performance mode: In this mode low virtual machine latency is // provided. V8 will try to avoid as many JavaScript execution interruptions // as possible. Throughput may be throttled. This is the default mode. PERFORMANCE_ANIMATION, // Idle performance mode: The embedder is idle. V8 can complete deferred work // in this mode. PERFORMANCE_IDLE, // Load performance mode: In this mode high throughput is provided. V8 may // turn off latency optimizations. PERFORMANCE_LOAD }; /** * Option flags passed to the SetJitCodeEventHandler function. */ enum JitCodeEventOptions { kJitCodeEventDefault = 0, // Generate callbacks for already existent code. kJitCodeEventEnumExisting = 1 }; /** * Callback function passed to SetJitCodeEventHandler. * * \param event code add, move or removal event. */ typedef void (*JitCodeEventHandler)(const JitCodeEvent* event); /** * Callback function passed to SetUnhandledExceptionCallback. */ #if defined(V8_OS_WIN) typedef int (*UnhandledExceptionCallback)( _EXCEPTION_POINTERS* exception_pointers); #endif /** * Interface for iterating through all external resources in the heap. */ class V8_EXPORT ExternalResourceVisitor { // NOLINT public: virtual ~ExternalResourceVisitor() = default; virtual void VisitExternalString(Local<String> string) {} }; /** * Interface for iterating through all the persistent handles in the heap. */ class V8_EXPORT PersistentHandleVisitor { // NOLINT public: virtual ~PersistentHandleVisitor() = default; virtual void VisitPersistentHandle(Persistent<Value>* value, uint16_t class_id) {} }; /** * Memory pressure level for the MemoryPressureNotification. * kNone hints V8 that there is no memory pressure. * kModerate hints V8 to speed up incremental garbage collection at the cost of * of higher latency due to garbage collection pauses. * kCritical hints V8 to free memory as soon as possible. Garbage collection * pauses at this level will be large. */ enum class MemoryPressureLevel { kNone, kModerate, kCritical }; /** * Interface for tracing through the embedder heap. During a V8 garbage * collection, V8 collects hidden fields of all potential wrappers, and at the * end of its marking phase iterates the collection and asks the embedder to * trace through its heap and use reporter to report each JavaScript object * reachable from any of the given wrappers. */ class V8_EXPORT EmbedderHeapTracer { public: using EmbedderStackState = cppgc::EmbedderStackState; enum TraceFlags : uint64_t { kNoFlags = 0, kReduceMemory = 1 << 0, kForced = 1 << 2, }; /** * Interface for iterating through TracedGlobal handles. */ class V8_EXPORT TracedGlobalHandleVisitor { public: virtual ~TracedGlobalHandleVisitor() = default; virtual void VisitTracedGlobalHandle(const TracedGlobal<Value>& handle) {} virtual void VisitTracedReference(const TracedReference<Value>& handle) {} }; /** * Summary of a garbage collection cycle. See |TraceEpilogue| on how the * summary is reported. */ struct TraceSummary { /** * Time spent managing the retained memory in milliseconds. This can e.g. * include the time tracing through objects in the embedder. */ double time = 0.0; /** * Memory retained by the embedder through the |EmbedderHeapTracer| * mechanism in bytes. */ size_t allocated_size = 0; }; virtual ~EmbedderHeapTracer() = default; /** * Iterates all TracedGlobal handles created for the v8::Isolate the tracer is * attached to. */ void IterateTracedGlobalHandles(TracedGlobalHandleVisitor* visitor); /** * Called by the embedder to set the start of the stack which is e.g. used by * V8 to determine whether handles are used from stack or heap. */ void SetStackStart(void* stack_start); /** * Called by the embedder to notify V8 of an empty execution stack. */ void NotifyEmptyEmbedderStack(); /** * Called by v8 to register internal fields of found wrappers. * * The embedder is expected to store them somewhere and trace reachable * wrappers from them when called through |AdvanceTracing|. */ virtual void RegisterV8References( const std::vector<std::pair<void*, void*> >& embedder_fields) = 0; void RegisterEmbedderReference(const TracedReferenceBase<v8::Data>& ref); /** * Called at the beginning of a GC cycle. */ virtual void TracePrologue(TraceFlags flags) {} /** * Called to advance tracing in the embedder. * * The embedder is expected to trace its heap starting from wrappers reported * by RegisterV8References method, and report back all reachable wrappers. * Furthermore, the embedder is expected to stop tracing by the given * deadline. A deadline of infinity means that tracing should be finished. * * Returns |true| if tracing is done, and false otherwise. */ virtual bool AdvanceTracing(double deadline_in_ms) = 0; /* * Returns true if there no more tracing work to be done (see AdvanceTracing) * and false otherwise. */ virtual bool IsTracingDone() = 0; /** * Called at the end of a GC cycle. * * Note that allocation is *not* allowed within |TraceEpilogue|. Can be * overriden to fill a |TraceSummary| that is used by V8 to schedule future * garbage collections. */ virtual void TraceEpilogue(TraceSummary* trace_summary) {} /** * Called upon entering the final marking pause. No more incremental marking * steps will follow this call. */ virtual void EnterFinalPause(EmbedderStackState stack_state) = 0; /* * Called by the embedder to request immediate finalization of the currently * running tracing phase that has been started with TracePrologue and not * yet finished with TraceEpilogue. * * Will be a noop when currently not in tracing. * * This is an experimental feature. */ void FinalizeTracing(); /** * Returns true if the TracedGlobal handle should be considered as root for * the currently running non-tracing garbage collection and false otherwise. * The default implementation will keep all TracedGlobal references as roots. * * If this returns false, then V8 may decide that the object referred to by * such a handle is reclaimed. In that case: * - No action is required if handles are used with destructors, i.e., by just * using |TracedGlobal|. * - When run without destructors, i.e., by using * |TracedReference|, V8 calls |ResetHandleInNonTracingGC|. * * Note that the |handle| is different from the handle that the embedder holds * for retaining the object. The embedder may use |WrapperClassId()| to * distinguish cases where it wants handles to be treated as roots from not * being treated as roots. */ virtual bool IsRootForNonTracingGC( const v8::TracedReference<v8::Value>& handle); virtual bool IsRootForNonTracingGC(const v8::TracedGlobal<v8::Value>& handle); /** * Used in combination with |IsRootForNonTracingGC|. Called by V8 when an * object that is backed by a handle is reclaimed by a non-tracing garbage * collection. It is up to the embedder to reset the original handle. * * Note that the |handle| is different from the handle that the embedder holds * for retaining the object. It is up to the embedder to find the original * handle via the object or class id. */ virtual void ResetHandleInNonTracingGC( const v8::TracedReference<v8::Value>& handle); /* * Called by the embedder to immediately perform a full garbage collection. * * Should only be used in testing code. */ void GarbageCollectionForTesting(EmbedderStackState stack_state); /* * Called by the embedder to signal newly allocated or freed memory. Not bound * to tracing phases. Embedders should trade off when increments are reported * as V8 may consult global heuristics on whether to trigger garbage * collection on this change. */ void IncreaseAllocatedSize(size_t bytes); void DecreaseAllocatedSize(size_t bytes); /* * Returns the v8::Isolate this tracer is attached too and |nullptr| if it * is not attached to any v8::Isolate. */ v8::Isolate* isolate() const { return isolate_; } protected: v8::Isolate* isolate_ = nullptr; friend class internal::LocalEmbedderHeapTracer; }; /** * Callback and supporting data used in SnapshotCreator to implement embedder * logic to serialize internal fields. * Internal fields that directly reference V8 objects are serialized without * calling this callback. Internal fields that contain aligned pointers are * serialized by this callback if it returns non-zero result. Otherwise it is * serialized verbatim. */ struct SerializeInternalFieldsCallback { typedef StartupData (*CallbackFunction)(Local<Object> holder, int index, void* data); SerializeInternalFieldsCallback(CallbackFunction function = nullptr, void* data_arg = nullptr)  : callback(function), data(data_arg) {} CallbackFunction callback; void* data; }; // Note that these fields are called "internal fields" in the API and called // "embedder fields" within V8. typedef SerializeInternalFieldsCallback SerializeEmbedderFieldsCallback; /** * Callback and supporting data used to implement embedder logic to deserialize * internal fields. */ struct DeserializeInternalFieldsCallback { typedef void (*CallbackFunction)(Local<Object> holder, int index, StartupData payload, void* data); DeserializeInternalFieldsCallback(CallbackFunction function = nullptr, void* data_arg = nullptr)  : callback(function), data(data_arg) {} void (*callback)(Local<Object> holder, int index, StartupData payload, void* data); void* data; }; typedef DeserializeInternalFieldsCallback DeserializeEmbedderFieldsCallback; /** * Controls how the default MeasureMemoryDelegate reports the result of * the memory measurement to JS. With kSummary only the total size is reported. * With kDetailed the result includes the size of each native context. */ enum class MeasureMemoryMode { kSummary, kDetailed }; /** * Controls how promptly a memory measurement request is executed. * By default the measurement is folded with the next scheduled GC which may * happen after a while. The kEager starts increment GC right away and * is useful for testing. */ enum class MeasureMemoryExecution { kDefault, kEager }; /** * The delegate is used in Isolate::MeasureMemory API. * * It specifies the contexts that need to be measured and gets called when * the measurement is completed to report the results. */ class V8_EXPORT MeasureMemoryDelegate { public: virtual ~MeasureMemoryDelegate() = default; /** * Returns true if the size of the given context needs to be measured. */ virtual bool ShouldMeasure(Local<Context> context) = 0; /** * This function is called when memory measurement finishes. * * \param context_sizes_in_bytes a vector of (context, size) pairs that * includes each context for which ShouldMeasure returned true and that * was not garbage collected while the memory measurement was in progress. * * \param unattributed_size_in_bytes total size of objects that were not * attributed to any context (i.e. are likely shared objects). */ virtual void MeasurementComplete( const std::vector<std::pair<Local<Context>, size_t>>& context_sizes_in_bytes, size_t unattributed_size_in_bytes) = 0; /** * Returns a default delegate that resolves the given promise when * the memory measurement completes. * * \param isolate the current isolate * \param context the current context * \param promise_resolver the promise resolver that is given the * result of the memory measurement. * \param mode the detail level of the result. */ static std::unique_ptr<MeasureMemoryDelegate> Default( Isolate* isolate, Local<Context> context, Local<Promise::Resolver> promise_resolver, MeasureMemoryMode mode); }; /** * Isolate represents an isolated instance of the V8 engine. V8 isolates have * completely separate states. Objects from one isolate must not be used in * other isolates. The embedder can create multiple isolates and use them in * parallel in multiple threads. An isolate can be entered by at most one * thread at any given time. The Locker/Unlocker API must be used to * synchronize. */ class V8_EXPORT Isolate { public: /** * Initial configuration parameters for a new Isolate. */ struct CreateParams { CreateParams()  : code_event_handler(nullptr), snapshot_blob(nullptr), counter_lookup_callback(nullptr), create_histogram_callback(nullptr), add_histogram_sample_callback(nullptr), array_buffer_allocator(nullptr), array_buffer_allocator_shared(), external_references(nullptr), allow_atomics_wait(true), only_terminate_in_safe_scope(false), embedder_wrapper_type_index(-1), embedder_wrapper_object_index(-1) {} /** * Allows the host application to provide the address of a function that is * notified each time code is added, moved or removed. */ JitCodeEventHandler code_event_handler; /** * ResourceConstraints to use for the new Isolate. */ ResourceConstraints constraints; /** * Explicitly specify a startup snapshot blob. The embedder owns the blob. */ StartupData* snapshot_blob; /** * Enables the host application to provide a mechanism for recording * statistics counters. */ CounterLookupCallback counter_lookup_callback; /** * Enables the host application to provide a mechanism for recording * histograms. The CreateHistogram function returns a * histogram which will later be passed to the AddHistogramSample * function. */ CreateHistogramCallback create_histogram_callback; AddHistogramSampleCallback add_histogram_sample_callback; /** * The ArrayBuffer::Allocator to use for allocating and freeing the backing * store of ArrayBuffers. * * If the shared_ptr version is used, the Isolate instance and every * |BackingStore| allocated using this allocator hold a std::shared_ptr * to the allocator, in order to facilitate lifetime * management for the allocator instance. */ ArrayBuffer::Allocator* array_buffer_allocator; std::shared_ptr<ArrayBuffer::Allocator> array_buffer_allocator_shared; /** * Specifies an optional nullptr-terminated array of raw addresses in the * embedder that V8 can match against during serialization and use for * deserialization. This array and its content must stay valid for the * entire lifetime of the isolate. */ const intptr_t* external_references; /** * Whether calling Atomics.wait (a function that may block) is allowed in * this isolate. This can also be configured via SetAllowAtomicsWait. */ bool allow_atomics_wait; /** * Termination is postponed when there is no active SafeForTerminationScope. */ bool only_terminate_in_safe_scope; /** * The following parameters describe the offsets for addressing type info * for wrapped API objects and are used by the fast C API * (for details see v8-fast-api-calls.h). */ int embedder_wrapper_type_index; int embedder_wrapper_object_index; }; /** * Stack-allocated class which sets the isolate for all operations * executed within a local scope. */ class V8_EXPORT Scope { public: explicit Scope(Isolate* isolate) : isolate_(isolate) { isolate->Enter(); } ~Scope() { isolate_->Exit(); } // Prevent copying of Scope objects. Scope(const Scope&) = delete; Scope& operator=(const Scope&) = delete; private: Isolate* const isolate_; }; /** * Assert that no Javascript code is invoked. */ class V8_EXPORT DisallowJavascriptExecutionScope { public: enum OnFailure { CRASH_ON_FAILURE, THROW_ON_FAILURE, DUMP_ON_FAILURE }; DisallowJavascriptExecutionScope(Isolate* isolate, OnFailure on_failure); ~DisallowJavascriptExecutionScope(); // Prevent copying of Scope objects. DisallowJavascriptExecutionScope(const DisallowJavascriptExecutionScope&) = delete; DisallowJavascriptExecutionScope& operator=( const DisallowJavascriptExecutionScope&) = delete; private: OnFailure on_failure_; void* internal_; }; /** * Introduce exception to DisallowJavascriptExecutionScope. */ class V8_EXPORT AllowJavascriptExecutionScope { public: explicit AllowJavascriptExecutionScope(Isolate* isolate); ~AllowJavascriptExecutionScope(); // Prevent copying of Scope objects. AllowJavascriptExecutionScope(const AllowJavascriptExecutionScope&) = delete; AllowJavascriptExecutionScope& operator=( const AllowJavascriptExecutionScope&) = delete; private: void* internal_throws_; void* internal_assert_; void* internal_dump_; }; /** * Do not run microtasks while this scope is active, even if microtasks are * automatically executed otherwise. */ class V8_EXPORT SuppressMicrotaskExecutionScope { public: explicit SuppressMicrotaskExecutionScope( Isolate* isolate, MicrotaskQueue* microtask_queue = nullptr); ~SuppressMicrotaskExecutionScope(); // Prevent copying of Scope objects. SuppressMicrotaskExecutionScope(const SuppressMicrotaskExecutionScope&) = delete; SuppressMicrotaskExecutionScope& operator=( const SuppressMicrotaskExecutionScope&) = delete; private: internal::Isolate* const isolate_; internal::MicrotaskQueue* const microtask_queue_; internal::Address previous_stack_height_; friend class internal::ThreadLocalTop; }; /** * This scope allows terminations inside direct V8 API calls and forbid them * inside any recursice API calls without explicit SafeForTerminationScope. */ class V8_EXPORT SafeForTerminationScope { public: explicit SafeForTerminationScope(v8::Isolate* isolate); ~SafeForTerminationScope(); // Prevent copying of Scope objects. SafeForTerminationScope(const SafeForTerminationScope&) = delete; SafeForTerminationScope& operator=(const SafeForTerminationScope&) = delete; private: internal::Isolate* isolate_; bool prev_value_; }; /** * Types of garbage collections that can be requested via * RequestGarbageCollectionForTesting. */ enum GarbageCollectionType { kFullGarbageCollection, kMinorGarbageCollection }; /** * Features reported via the SetUseCounterCallback callback. Do not change * assigned numbers of existing items; add new features to the end of this * list. */ enum UseCounterFeature { kUseAsm = 0, kBreakIterator = 1, kLegacyConst = 2, kMarkDequeOverflow = 3, kStoreBufferOverflow = 4, kSlotsBufferOverflow = 5, kObjectObserve = 6, kForcedGC = 7, kSloppyMode = 8, kStrictMode = 9, kStrongMode = 10, kRegExpPrototypeStickyGetter = 11, kRegExpPrototypeToString = 12, kRegExpPrototypeUnicodeGetter = 13, kIntlV8Parse = 14, kIntlPattern = 15, kIntlResolved = 16, kPromiseChain = 17, kPromiseAccept = 18, kPromiseDefer = 19, kHtmlCommentInExternalScript = 20, kHtmlComment = 21, kSloppyModeBlockScopedFunctionRedefinition = 22, kForInInitializer = 23, kArrayProtectorDirtied = 24, kArraySpeciesModified = 25, kArrayPrototypeConstructorModified = 26, kArrayInstanceProtoModified = 27, kArrayInstanceConstructorModified = 28, kLegacyFunctionDeclaration = 29, kRegExpPrototypeSourceGetter = 30, kRegExpPrototypeOldFlagGetter = 31, kDecimalWithLeadingZeroInStrictMode = 32, kLegacyDateParser = 33, kDefineGetterOrSetterWouldThrow = 34, kFunctionConstructorReturnedUndefined = 35, kAssigmentExpressionLHSIsCallInSloppy = 36, kAssigmentExpressionLHSIsCallInStrict = 37, kPromiseConstructorReturnedUndefined = 38, kConstructorNonUndefinedPrimitiveReturn = 39, kLabeledExpressionStatement = 40, kLineOrParagraphSeparatorAsLineTerminator = 41, kIndexAccessor = 42, kErrorCaptureStackTrace = 43, kErrorPrepareStackTrace = 44, kErrorStackTraceLimit = 45, kWebAssemblyInstantiation = 46, kDeoptimizerDisableSpeculation = 47, kArrayPrototypeSortJSArrayModifiedPrototype = 48, kFunctionTokenOffsetTooLongForToString = 49, kWasmSharedMemory = 50, kWasmThreadOpcodes = 51, kAtomicsNotify = 52, kAtomicsWake = 53, kCollator = 54, kNumberFormat = 55, kDateTimeFormat = 56, kPluralRules = 57, kRelativeTimeFormat = 58, kLocale = 59, kListFormat = 60, kSegmenter = 61, kStringLocaleCompare = 62, kStringToLocaleUpperCase = 63, kStringToLocaleLowerCase = 64, kNumberToLocaleString = 65, kDateToLocaleString = 66, kDateToLocaleDateString = 67, kDateToLocaleTimeString = 68, kAttemptOverrideReadOnlyOnPrototypeSloppy = 69, kAttemptOverrideReadOnlyOnPrototypeStrict = 70, kOptimizedFunctionWithOneShotBytecode = 71, kRegExpMatchIsTrueishOnNonJSRegExp = 72, kRegExpMatchIsFalseishOnJSRegExp = 73, kDateGetTimezoneOffset = 74, // Unused. kStringNormalize = 75, kCallSiteAPIGetFunctionSloppyCall = 76, kCallSiteAPIGetThisSloppyCall = 77, kRegExpMatchAllWithNonGlobalRegExp = 78, kRegExpExecCalledOnSlowRegExp = 79, kRegExpReplaceCalledOnSlowRegExp = 80, kDisplayNames = 81, kSharedArrayBufferConstructed = 82, kArrayPrototypeHasElements = 83, kObjectPrototypeHasElements = 84, kNumberFormatStyleUnit = 85, kDateTimeFormatRange = 86, kDateTimeFormatDateTimeStyle = 87, kBreakIteratorTypeWord = 88, kBreakIteratorTypeLine = 89, kInvalidatedArrayBufferDetachingProtector = 90, kInvalidatedArrayConstructorProtector = 91, kInvalidatedArrayIteratorLookupChainProtector = 92, kInvalidatedArraySpeciesLookupChainProtector = 93, kInvalidatedIsConcatSpreadableLookupChainProtector = 94, kInvalidatedMapIteratorLookupChainProtector = 95, kInvalidatedNoElementsProtector = 96, kInvalidatedPromiseHookProtector = 97, kInvalidatedPromiseResolveLookupChainProtector = 98, kInvalidatedPromiseSpeciesLookupChainProtector = 99, kInvalidatedPromiseThenLookupChainProtector = 100, kInvalidatedRegExpSpeciesLookupChainProtector = 101, kInvalidatedSetIteratorLookupChainProtector = 102, kInvalidatedStringIteratorLookupChainProtector = 103, kInvalidatedStringLengthOverflowLookupChainProtector = 104, kInvalidatedTypedArraySpeciesLookupChainProtector = 105, kWasmSimdOpcodes = 106, kVarRedeclaredCatchBinding = 107, // If you add new values here, you'll also need to update Chromium's: // web_feature.mojom, use_counter_callback.cc, and enums.xml. V8 changes to // this list need to be landed first, then changes on the Chromium side. kUseCounterFeatureCount // This enum value must be last. }; enum MessageErrorLevel { kMessageLog = (1 << 0), kMessageDebug = (1 << 1), kMessageInfo = (1 << 2), kMessageError = (1 << 3), kMessageWarning = (1 << 4), kMessageAll = kMessageLog | kMessageDebug | kMessageInfo | kMessageError | kMessageWarning, }; typedef void (*UseCounterCallback)(Isolate* isolate, UseCounterFeature feature); /** * Allocates a new isolate but does not initialize it. Does not change the * currently entered isolate. * * Only Isolate::GetData() and Isolate::SetData(), which access the * embedder-controlled parts of the isolate, are allowed to be called on the * uninitialized isolate. To initialize the isolate, call * Isolate::Initialize(). * * When an isolate is no longer used its resources should be freed * by calling Dispose(). Using the delete operator is not allowed. * * V8::Initialize() must have run prior to this. */ static Isolate* Allocate(); /** * Initialize an Isolate previously allocated by Isolate::Allocate(). */ static void Initialize(Isolate* isolate, const CreateParams& params); /** * Creates a new isolate. Does not change the currently entered * isolate. * * When an isolate is no longer used its resources should be freed * by calling Dispose(). Using the delete operator is not allowed. * * V8::Initialize() must have run prior to this. */ static Isolate* New(const CreateParams& params); /** * Returns the entered isolate for the current thread or NULL in * case there is no current isolate. * * This method must not be invoked before V8::Initialize() was invoked. */ static Isolate* GetCurrent(); /** * Clears the set of objects held strongly by the heap. This set of * objects are originally built when a WeakRef is created or * successfully dereferenced. * * This is invoked automatically after microtasks are run. See * MicrotasksPolicy for when microtasks are run. * * This needs to be manually invoked only if the embedder is manually running * microtasks via a custom MicrotaskQueue class's PerformCheckpoint. In that * case, it is the embedder's responsibility to make this call at a time which * does not interrupt synchronous ECMAScript code execution. */ void ClearKeptObjects(); /** * Custom callback used by embedders to help V8 determine if it should abort * when it throws and no internal handler is predicted to catch the * exception. If --abort-on-uncaught-exception is used on the command line, * then V8 will abort if either: * - no custom callback is set. * - the custom callback set returns true. * Otherwise, the custom callback will not be called and V8 will not abort. */ typedef bool (*AbortOnUncaughtExceptionCallback)(Isolate*); void SetAbortOnUncaughtExceptionCallback( AbortOnUncaughtExceptionCallback callback); /** * This specifies the callback called by the upcoming dynamic * import() language feature to load modules. */ void SetHostImportModuleDynamicallyCallback( HostImportModuleDynamicallyCallback callback); /** * This specifies the callback called by the upcoming importa.meta * language feature to retrieve host-defined meta data for a module. */ void SetHostInitializeImportMetaObjectCallback( HostInitializeImportMetaObjectCallback callback); /** * This specifies the callback called when the stack property of Error * is accessed. */ void SetPrepareStackTraceCallback(PrepareStackTraceCallback callback); /** * Optional notification that the system is running low on memory. * V8 uses these notifications to guide heuristics. * It is allowed to call this function from another thread while * the isolate is executing long running JavaScript code. */ void MemoryPressureNotification(MemoryPressureLevel level); /** * Methods below this point require holding a lock (using Locker) in * a multi-threaded environment. */ /** * Sets this isolate as the entered one for the current thread. * Saves the previously entered one (if any), so that it can be * restored when exiting. Re-entering an isolate is allowed. */ void Enter(); /** * Exits this isolate by restoring the previously entered one in the * current thread. The isolate may still stay the same, if it was * entered more than once. * * Requires: this == Isolate::GetCurrent(). */ void Exit(); /** * Disposes the isolate. The isolate must not be entered by any * thread to be disposable. */ void Dispose(); /** * Dumps activated low-level V8 internal stats. This can be used instead * of performing a full isolate disposal. */ void DumpAndResetStats(); /** * Discards all V8 thread-specific data for the Isolate. Should be used * if a thread is terminating and it has used an Isolate that will outlive * the thread -- all thread-specific data for an Isolate is discarded when * an Isolate is disposed so this call is pointless if an Isolate is about * to be Disposed. */ void DiscardThreadSpecificMetadata(); /** * Associate embedder-specific data with the isolate. |slot| has to be * between 0 and GetNumberOfDataSlots() - 1. */ V8_INLINE void SetData(uint32_t slot, void* data); /** * Retrieve embedder-specific data from the isolate. * Returns NULL if SetData has never been called for the given |slot|. */ V8_INLINE void* GetData(uint32_t slot); /** * Returns the maximum number of available embedder data slots. Valid slots * are in the range of 0 - GetNumberOfDataSlots() - 1. */ V8_INLINE static uint32_t GetNumberOfDataSlots(); /** * Return data that was previously attached to the isolate snapshot via * SnapshotCreator, and removes the reference to it. * Repeated call with the same index returns an empty MaybeLocal. */ template <class T> V8_INLINE MaybeLocal<T> GetDataFromSnapshotOnce(size_t index); /** * Get statistics about the heap memory usage. */ void GetHeapStatistics(HeapStatistics* heap_statistics); /** * Returns the number of spaces in the heap. */ size_t NumberOfHeapSpaces(); /** * Get the memory usage of a space in the heap. * * \param space_statistics The HeapSpaceStatistics object to fill in * statistics. * \param index The index of the space to get statistics from, which ranges * from 0 to NumberOfHeapSpaces() - 1. * \returns true on success. */ bool GetHeapSpaceStatistics(HeapSpaceStatistics* space_statistics, size_t index); /** * Returns the number of types of objects tracked in the heap at GC. */ size_t NumberOfTrackedHeapObjectTypes(); /** * Get statistics about objects in the heap. * * \param object_statistics The HeapObjectStatistics object to fill in * statistics of objects of given type, which were live in the previous GC. * \param type_index The index of the type of object to fill details about, * which ranges from 0 to NumberOfTrackedHeapObjectTypes() - 1. * \returns true on success. */ bool GetHeapObjectStatisticsAtLastGC(HeapObjectStatistics* object_statistics, size_t type_index); /** * Get statistics about code and its metadata in the heap. * * \param object_statistics The HeapCodeStatistics object to fill in * statistics of code, bytecode and their metadata. * \returns true on success. */ bool GetHeapCodeAndMetadataStatistics(HeapCodeStatistics* object_statistics); /** * This API is experimental and may change significantly. * * Enqueues a memory measurement request and invokes the delegate with the * results. * * \param delegate the delegate that defines which contexts to measure and * reports the results. * * \param execution promptness executing the memory measurement. * The kEager value is expected to be used only in tests. */ bool MeasureMemory( std::unique_ptr<MeasureMemoryDelegate> delegate, MeasureMemoryExecution execution = MeasureMemoryExecution::kDefault); V8_DEPRECATE_SOON("Use the version with a delegate") MaybeLocal<Promise> MeasureMemory(Local<Context> context, MeasureMemoryMode mode); /** * Get a call stack sample from the isolate. * \param state Execution state. * \param frames Caller allocated buffer to store stack frames. * \param frames_limit Maximum number of frames to capture. The buffer must * be large enough to hold the number of frames. * \param sample_info The sample info is filled up by the function * provides number of actual captured stack frames and * the current VM state. * \note GetStackSample should only be called when the JS thread is paused or * interrupted. Otherwise the behavior is undefined. */ void GetStackSample(const RegisterState& state, void** frames, size_t frames_limit, SampleInfo* sample_info); /** * Adjusts the amount of registered external memory. Used to give V8 an * indication of the amount of externally allocated memory that is kept alive * by JavaScript objects. V8 uses this to decide when to perform global * garbage collections. Registering externally allocated memory will trigger * global garbage collections more often than it would otherwise in an attempt * to garbage collect the JavaScript objects that keep the externally * allocated memory alive. * * \param change_in_bytes the change in externally allocated memory that is * kept alive by JavaScript objects. * \returns the adjusted value. */ V8_INLINE int64_t AdjustAmountOfExternalAllocatedMemory(int64_t change_in_bytes); /** * Returns the number of phantom handles without callbacks that were reset * by the garbage collector since the last call to this function. */ size_t NumberOfPhantomHandleResetsSinceLastCall(); /** * Returns heap profiler for this isolate. Will return NULL until the isolate * is initialized. */ HeapProfiler* GetHeapProfiler(); /** * Tells the VM whether the embedder is idle or not. */ void SetIdle(bool is_idle); /** Returns the ArrayBuffer::Allocator used in this isolate. */ ArrayBuffer::Allocator* GetArrayBufferAllocator(); /** Returns true if this isolate has a current context. */ bool InContext(); /** * Returns the context of the currently running JavaScript, or the context * on the top of the stack if no JavaScript is running. */ Local<Context> GetCurrentContext(); /** Returns the last context entered through V8's C++ API. */ V8_DEPRECATED("Use GetEnteredOrMicrotaskContext().") Local<Context> GetEnteredContext(); /** * Returns either the last context entered through V8's C++ API, or the * context of the currently running microtask while processing microtasks. * If a context is entered while executing a microtask, that context is * returned. */ Local<Context> GetEnteredOrMicrotaskContext(); /** * Returns the Context that corresponds to the Incumbent realm in HTML spec. * https://html.spec.whatwg.org/multipage/webappapis.html#incumbent */ Local<Context> GetIncumbentContext(); /** * Schedules an exception to be thrown when returning to JavaScript. When an * exception has been scheduled it is illegal to invoke any JavaScript * operation; the caller must return immediately and only after the exception * has been handled does it become legal to invoke JavaScript operations. */ Local<Value> ThrowException(Local<Value> exception); typedef void (*GCCallback)(Isolate* isolate, GCType type, GCCallbackFlags flags); typedef void (*GCCallbackWithData)(Isolate* isolate, GCType type, GCCallbackFlags flags, void* data); /** * Enables the host application to receive a notification before a * garbage collection. Allocations are allowed in the callback function, * but the callback is not re-entrant: if the allocation inside it will * trigger the garbage collection, the callback won't be called again. * It is possible to specify the GCType filter for your callback. But it is * not possible to register the same callback function two times with * different GCType filters. */ void AddGCPrologueCallback(GCCallbackWithData callback, void* data = nullptr, GCType gc_type_filter = kGCTypeAll); void AddGCPrologueCallback(GCCallback callback, GCType gc_type_filter = kGCTypeAll); /** * This function removes callback which was installed by * AddGCPrologueCallback function. */ void RemoveGCPrologueCallback(GCCallbackWithData, void* data = nullptr); void RemoveGCPrologueCallback(GCCallback callback); /** * Sets the embedder heap tracer for the isolate. */ void SetEmbedderHeapTracer(EmbedderHeapTracer* tracer); /* * Gets the currently active heap tracer for the isolate. */ EmbedderHeapTracer* GetEmbedderHeapTracer(); /** * Use for |AtomicsWaitCallback| to indicate the type of event it receives. */ enum class AtomicsWaitEvent { /** Indicates that this call is happening before waiting. */ kStartWait, /** `Atomics.wait()` finished because of an `Atomics.wake()` call. */ kWokenUp, /** `Atomics.wait()` finished because it timed out. */ kTimedOut, /** `Atomics.wait()` was interrupted through |TerminateExecution()|. */ kTerminatedExecution, /** `Atomics.wait()` was stopped through |AtomicsWaitWakeHandle|. */ kAPIStopped, /** `Atomics.wait()` did not wait, as the initial condition was not met. */ kNotEqual }; /** * Passed to |AtomicsWaitCallback| as a means of stopping an ongoing * `Atomics.wait` call. */ class V8_EXPORT AtomicsWaitWakeHandle { public: /** * Stop this `Atomics.wait()` call and call the |AtomicsWaitCallback| * with |kAPIStopped|. * * This function may be called from another thread. The caller has to ensure * through proper synchronization that it is not called after * the finishing |AtomicsWaitCallback|. * * Note that the ECMAScript specification does not plan for the possibility * of wakeups that are neither coming from a timeout or an `Atomics.wake()` * call, so this may invalidate assumptions made by existing code. * The embedder may accordingly wish to schedule an exception in the * finishing |AtomicsWaitCallback|. */ void Wake(); }; /** * Embedder callback for `Atomics.wait()` that can be added through * |SetAtomicsWaitCallback|. * * This will be called just before starting to wait with the |event| value * |kStartWait| and after finishing waiting with one of the other * values of |AtomicsWaitEvent| inside of an `Atomics.wait()` call. * * |array_buffer| will refer to the underlying SharedArrayBuffer, * |offset_in_bytes| to the location of the waited-on memory address inside * the SharedArrayBuffer. * * |value| and |timeout_in_ms| will be the values passed to * the `Atomics.wait()` call. If no timeout was used, |timeout_in_ms| * will be `INFINITY`. * * In the |kStartWait| callback, |stop_handle| will be an object that * is only valid until the corresponding finishing callback and that * can be used to stop the wait process while it is happening. * * This callback may schedule exceptions, *unless* |event| is equal to * |kTerminatedExecution|. */ typedef void (*AtomicsWaitCallback)(AtomicsWaitEvent event, Local<SharedArrayBuffer> array_buffer, size_t offset_in_bytes, int64_t value, double timeout_in_ms, AtomicsWaitWakeHandle* stop_handle, void* data); /** * Set a new |AtomicsWaitCallback|. This overrides an earlier * |AtomicsWaitCallback|, if there was any. If |callback| is nullptr, * this unsets the callback. |data| will be passed to the callback * as its last parameter. */ void SetAtomicsWaitCallback(AtomicsWaitCallback callback, void* data); /** * Enables the host application to receive a notification after a * garbage collection. Allocations are allowed in the callback function, * but the callback is not re-entrant: if the allocation inside it will * trigger the garbage collection, the callback won't be called again. * It is possible to specify the GCType filter for your callback. But it is * not possible to register the same callback function two times with * different GCType filters. */ void AddGCEpilogueCallback(GCCallbackWithData callback, void* data = nullptr, GCType gc_type_filter = kGCTypeAll); void AddGCEpilogueCallback(GCCallback callback, GCType gc_type_filter = kGCTypeAll); /** * This function removes callback which was installed by * AddGCEpilogueCallback function. */ void RemoveGCEpilogueCallback(GCCallbackWithData callback, void* data = nullptr); void RemoveGCEpilogueCallback(GCCallback callback); typedef size_t (*GetExternallyAllocatedMemoryInBytesCallback)(); /** * Set the callback that tells V8 how much memory is currently allocated * externally of the V8 heap. Ideally this memory is somehow connected to V8 * objects and may get freed-up when the corresponding V8 objects get * collected by a V8 garbage collection. */ void SetGetExternallyAllocatedMemoryInBytesCallback( GetExternallyAllocatedMemoryInBytesCallback callback); /** * Forcefully terminate the current thread of JavaScript execution * in the given isolate. * * This method can be used by any thread even if that thread has not * acquired the V8 lock with a Locker object. */ void TerminateExecution(); /** * Is V8 terminating JavaScript execution. * * Returns true if JavaScript execution is currently terminating * because of a call to TerminateExecution. In that case there are * still JavaScript frames on the stack and the termination * exception is still active. */ bool IsExecutionTerminating(); /** * Resume execution capability in the given isolate, whose execution * was previously forcefully terminated using TerminateExecution(). * * When execution is forcefully terminated using TerminateExecution(), * the isolate can not resume execution until all JavaScript frames * have propagated the uncatchable exception which is generated. This * method allows the program embedding the engine to handle the * termination event and resume execution capability, even if * JavaScript frames remain on the stack. * * This method can be used by any thread even if that thread has not * acquired the V8 lock with a Locker object. */ void CancelTerminateExecution(); /** * Request V8 to interrupt long running JavaScript code and invoke * the given |callback| passing the given |data| to it. After |callback| * returns control will be returned to the JavaScript code. * There may be a number of interrupt requests in flight. * Can be called from another thread without acquiring a |Locker|. * Registered |callback| must not reenter interrupted Isolate. */ void RequestInterrupt(InterruptCallback callback, void* data); /** * Request garbage collection in this Isolate. It is only valid to call this * function if --expose_gc was specified. * * This should only be used for testing purposes and not to enforce a garbage * collection schedule. It has strong negative impact on the garbage * collection performance. Use IdleNotificationDeadline() or * LowMemoryNotification() instead to influence the garbage collection * schedule. */ void RequestGarbageCollectionForTesting(GarbageCollectionType type); /** * Set the callback to invoke for logging event. */ void SetEventLogger(LogEventCallback that); /** * Adds a callback to notify the host application right before a script * is about to run. If a script re-enters the runtime during executing, the * BeforeCallEnteredCallback is invoked for each re-entrance. * Executing scripts inside the callback will re-trigger the callback. */ void AddBeforeCallEnteredCallback(BeforeCallEnteredCallback callback); /** * Removes callback that was installed by AddBeforeCallEnteredCallback. */ void RemoveBeforeCallEnteredCallback(BeforeCallEnteredCallback callback); /** * Adds a callback to notify the host application when a script finished * running. If a script re-enters the runtime during executing, the * CallCompletedCallback is only invoked when the outer-most script * execution ends. Executing scripts inside the callback do not trigger * further callbacks. */ void AddCallCompletedCallback(CallCompletedCallback callback); /** * Removes callback that was installed by AddCallCompletedCallback. */ void RemoveCallCompletedCallback(CallCompletedCallback callback); /** * Set the PromiseHook callback for various promise lifecycle * events. */ void SetPromiseHook(PromiseHook hook); /** * Set callback to notify about promise reject with no handler, or * revocation of such a previous notification once the handler is added. */ void SetPromiseRejectCallback(PromiseRejectCallback callback); /** * An alias for PerformMicrotaskCheckpoint. */ V8_DEPRECATE_SOON("Use PerformMicrotaskCheckpoint.") void RunMicrotasks() { PerformMicrotaskCheckpoint(); } /** * Runs the default MicrotaskQueue until it gets empty and perform other * microtask checkpoint steps, such as calling ClearKeptObjects. Asserts that * the MicrotasksPolicy is not kScoped. Any exceptions thrown by microtask * callbacks are swallowed. */ void PerformMicrotaskCheckpoint(); /** * Enqueues the callback to the default MicrotaskQueue */ void EnqueueMicrotask(Local<Function> microtask); /** * Enqueues the callback to the default MicrotaskQueue */ void EnqueueMicrotask(MicrotaskCallback callback, void* data = nullptr); /** * Controls how Microtasks are invoked. See MicrotasksPolicy for details. */ void SetMicrotasksPolicy(MicrotasksPolicy policy); /** * Returns the policy controlling how Microtasks are invoked. */ MicrotasksPolicy GetMicrotasksPolicy() const; /** * Adds a callback to notify the host application after * microtasks were run on the default MicrotaskQueue. The callback is * triggered by explicit RunMicrotasks call or automatic microtasks execution * (see SetMicrotaskPolicy). * * Callback will trigger even if microtasks were attempted to run, * but the microtasks queue was empty and no single microtask was actually * executed. * * Executing scripts inside the callback will not re-trigger microtasks and * the callback. */ V8_DEPRECATE_SOON("Use *WithData version.") void AddMicrotasksCompletedCallback(MicrotasksCompletedCallback callback); void AddMicrotasksCompletedCallback( MicrotasksCompletedCallbackWithData callback, void* data = nullptr); /** * Removes callback that was installed by AddMicrotasksCompletedCallback. */ V8_DEPRECATE_SOON("Use *WithData version.") void RemoveMicrotasksCompletedCallback(MicrotasksCompletedCallback callback); void RemoveMicrotasksCompletedCallback( MicrotasksCompletedCallbackWithData callback, void* data = nullptr); /** * Sets a callback for counting the number of times a feature of V8 is used. */ void SetUseCounterCallback(UseCounterCallback callback); /** * Enables the host application to provide a mechanism for recording * statistics counters. */ void SetCounterFunction(CounterLookupCallback); /** * Enables the host application to provide a mechanism for recording * histograms. The CreateHistogram function returns a * histogram which will later be passed to the AddHistogramSample * function. */ void SetCreateHistogramFunction(CreateHistogramCallback); void SetAddHistogramSampleFunction(AddHistogramSampleCallback); /** * Enables the host application to provide a mechanism for recording a * predefined set of data as crash keys to be used in postmortem debugging in * case of a crash. */ void SetAddCrashKeyCallback(AddCrashKeyCallback); /** * Optional notification that the embedder is idle. * V8 uses the notification to perform garbage collection. * This call can be used repeatedly if the embedder remains idle. * Returns true if the embedder should stop calling IdleNotificationDeadline * until real work has been done. This indicates that V8 has done * as much cleanup as it will be able to do. * * The deadline_in_seconds argument specifies the deadline V8 has to finish * garbage collection work. deadline_in_seconds is compared with * MonotonicallyIncreasingTime() and should be based on the same timebase as * that function. There is no guarantee that the actual work will be done * within the time limit. */ bool IdleNotificationDeadline(double deadline_in_seconds); /** * Optional notification that the system is running low on memory. * V8 uses these notifications to attempt to free memory. */ void LowMemoryNotification(); /** * Optional notification that a context has been disposed. V8 uses these * notifications to guide the GC heuristic and cancel FinalizationRegistry * cleanup tasks. Returns the number of context disposals - including this one * - since the last time V8 had a chance to clean up. * * The optional parameter |dependant_context| specifies whether the disposed * context was depending on state from other contexts or not. */ int ContextDisposedNotification(bool dependant_context = true); /** * Optional notification that the isolate switched to the foreground. * V8 uses these notifications to guide heuristics. */ void IsolateInForegroundNotification(); /** * Optional notification that the isolate switched to the background. * V8 uses these notifications to guide heuristics. */ void IsolateInBackgroundNotification(); /** * Optional notification which will enable the memory savings mode. * V8 uses this notification to guide heuristics which may result in a * smaller memory footprint at the cost of reduced runtime performance. */ void EnableMemorySavingsMode(); /** * Optional notification which will disable the memory savings mode. */ void DisableMemorySavingsMode(); /** * Optional notification to tell V8 the current performance requirements * of the embedder based on RAIL. * V8 uses these notifications to guide heuristics. * This is an unfinished experimental feature. Semantics and implementation * may change frequently. */ void SetRAILMode(RAILMode rail_mode); /** * Optional notification to tell V8 the current isolate is used for debugging * and requires higher heap limit. */ void IncreaseHeapLimitForDebugging(); /** * Restores the original heap limit after IncreaseHeapLimitForDebugging(). */ void RestoreOriginalHeapLimit(); /** * Returns true if the heap limit was increased for debugging and the * original heap limit was not restored yet. */ bool IsHeapLimitIncreasedForDebugging(); /** * Allows the host application to provide the address of a function that is * notified each time code is added, moved or removed. * * \param options options for the JIT code event handler. * \param event_handler the JIT code event handler, which will be invoked * each time code is added, moved or removed. * \note \p event_handler won't get notified of existent code. * \note since code removal notifications are not currently issued, the * \p event_handler may get notifications of code that overlaps earlier * code notifications. This happens when code areas are reused, and the * earlier overlapping code areas should therefore be discarded. * \note the events passed to \p event_handler and the strings they point to * are not guaranteed to live past each call. The \p event_handler must * copy strings and other parameters it needs to keep around. * \note the set of events declared in JitCodeEvent::EventType is expected to * grow over time, and the JitCodeEvent structure is expected to accrue * new members. The \p event_handler function must ignore event codes * it does not recognize to maintain future compatibility. * \note Use Isolate::CreateParams to get events for code executed during * Isolate setup. */ void SetJitCodeEventHandler(JitCodeEventOptions options, JitCodeEventHandler event_handler); /** * Modifies the stack limit for this Isolate. * * \param stack_limit An address beyond which the Vm's stack may not grow. * * \note If you are using threads then you should hold the V8::Locker lock * while setting the stack limit and you must set a non-default stack * limit separately for each thread. */ void SetStackLimit(uintptr_t stack_limit); /** * Returns a memory range that can potentially contain jitted code. Code for * V8's 'builtins' will not be in this range if embedded builtins is enabled. * * On Win64, embedders are advised to install function table callbacks for * these ranges, as default SEH won't be able to unwind through jitted code. * The first page of the code range is reserved for the embedder and is * committed, writable, and executable, to be used to store unwind data, as * documented in * https://docs.microsoft.com/en-us/cpp/build/exception-handling-x64. * * Might be empty on other platforms. * * https://code.google.com/p/v8/issues/detail?id=3598 */ void GetCodeRange(void** start, size_t* length_in_bytes); /** * Returns the UnwindState necessary for use with the Unwinder API. */ // TODO(petermarshall): Remove this API. V8_DEPRECATED("Use entry_stubs + code_pages version.") UnwindState GetUnwindState(); /** * Returns the JSEntryStubs necessary for use with the Unwinder API. */ JSEntryStubs GetJSEntryStubs(); static constexpr size_t kMinCodePagesBufferSize = 32; /** * Copies the code heap pages currently in use by V8 into |code_pages_out|. * |code_pages_out| must have at least kMinCodePagesBufferSize capacity and * must be empty. * * Signal-safe, does not allocate, does not access the V8 heap. * No code on the stack can rely on pages that might be missing. * * Returns the number of pages available to be copied, which might be greater * than |capacity|. In this case, only |capacity| pages will be copied into * |code_pages_out|. The caller should provide a bigger buffer on the next * call in order to get all available code pages, but this is not required. */ size_t CopyCodePages(size_t capacity, MemoryRange* code_pages_out); /** Set the callback to invoke in case of fatal errors. */ void SetFatalErrorHandler(FatalErrorCallback that); /** Set the callback to invoke in case of OOM errors. */ void SetOOMErrorHandler(OOMErrorCallback that); /** * Add a callback to invoke in case the heap size is close to the heap limit. * If multiple callbacks are added, only the most recently added callback is * invoked. */ void AddNearHeapLimitCallback(NearHeapLimitCallback callback, void* data); /** * Remove the given callback and restore the heap limit to the * given limit. If the given limit is zero, then it is ignored. * If the current heap size is greater than the given limit, * then the heap limit is restored to the minimal limit that * is possible for the current heap size. */ void RemoveNearHeapLimitCallback(NearHeapLimitCallback callback, size_t heap_limit); /** * If the heap limit was changed by the NearHeapLimitCallback, then the * initial heap limit will be restored once the heap size falls below the * given threshold percentage of the initial heap limit. * The threshold percentage is a number in (0.0, 1.0) range. */ void AutomaticallyRestoreInitialHeapLimit(double threshold_percent = 0.5); /** * Set the callback to invoke to check if code generation from * strings should be allowed. */ V8_DEPRECATED( "Use Isolate::SetModifyCodeGenerationFromStringsCallback instead. " "See http://crbug.com/v8/10096.") void SetAllowCodeGenerationFromStringsCallback( AllowCodeGenerationFromStringsCallback callback); void SetModifyCodeGenerationFromStringsCallback( ModifyCodeGenerationFromStringsCallback callback); /** * Set the callback to invoke to check if wasm code generation should * be allowed. */ void SetAllowWasmCodeGenerationCallback( AllowWasmCodeGenerationCallback callback); /** * Embedder over{ride|load} injection points for wasm APIs. The expectation * is that the embedder sets them at most once. */ void SetWasmModuleCallback(ExtensionCallback callback); void SetWasmInstanceCallback(ExtensionCallback callback); void SetWasmStreamingCallback(WasmStreamingCallback callback); void SetWasmThreadsEnabledCallback(WasmThreadsEnabledCallback callback); void SetWasmLoadSourceMapCallback(WasmLoadSourceMapCallback callback); void SetWasmSimdEnabledCallback(WasmSimdEnabledCallback callback); /** * Check if V8 is dead and therefore unusable. This is the case after * fatal errors such as out-of-memory situations. */ bool IsDead(); /** * Adds a message listener (errors only). * * The same message listener can be added more than once and in that * case it will be called more than once for each message. * * If data is specified, it will be passed to the callback when it is called. * Otherwise, the exception object will be passed to the callback instead. */ bool AddMessageListener(MessageCallback that, Local<Value> data = Local<Value>()); /** * Adds a message listener. * * The same message listener can be added more than once and in that * case it will be called more than once for each message. * * If data is specified, it will be passed to the callback when it is called. * Otherwise, the exception object will be passed to the callback instead. * * A listener can listen for particular error levels by providing a mask. */ bool AddMessageListenerWithErrorLevel(MessageCallback that, int message_levels, Local<Value> data = Local<Value>()); /** * Remove all message listeners from the specified callback function. */ void RemoveMessageListeners(MessageCallback that); /** Callback function for reporting failed access checks.*/ void SetFailedAccessCheckCallbackFunction(FailedAccessCheckCallback); /** * Tells V8 to capture current stack trace when uncaught exception occurs * and report it to the message listeners. The option is off by default. */ void SetCaptureStackTraceForUncaughtExceptions( bool capture, int frame_limit = 10, StackTrace::StackTraceOptions options = StackTrace::kOverview); /** * Iterates through all external resources referenced from current isolate * heap. GC is not invoked prior to iterating, therefore there is no * guarantee that visited objects are still alive. */ void VisitExternalResources(ExternalResourceVisitor* visitor); /** * Iterates through all the persistent handles in the current isolate's heap * that have class_ids. */ void VisitHandlesWithClassIds(PersistentHandleVisitor* visitor); /** * Iterates through all the persistent handles in the current isolate's heap * that have class_ids and are weak to be marked as inactive if there is no * pending activity for the handle. */ void VisitWeakHandles(PersistentHandleVisitor* visitor); /** * Check if this isolate is in use. * True if at least one thread Enter'ed this isolate. */ bool IsInUse(); /** * Set whether calling Atomics.wait (a function that may block) is allowed in * this isolate. This can also be configured via * CreateParams::allow_atomics_wait. */ void SetAllowAtomicsWait(bool allow); /** * Time zone redetection indicator for * DateTimeConfigurationChangeNotification. * * kSkip indicates V8 that the notification should not trigger redetecting * host time zone. kRedetect indicates V8 that host time zone should be * redetected, and used to set the default time zone. * * The host time zone detection may require file system access or similar * operations unlikely to be available inside a sandbox. If v8 is run inside a * sandbox, the host time zone has to be detected outside the sandbox before * calling DateTimeConfigurationChangeNotification function. */ enum class TimeZoneDetection { kSkip, kRedetect }; /** * Notification that the embedder has changed the time zone, daylight savings * time or other date / time configuration parameters. V8 keeps a cache of * various values used for date / time computation. This notification will * reset those cached values for the current context so that date / time * configuration changes would be reflected. * * This API should not be called more than needed as it will negatively impact * the performance of date operations. */ void DateTimeConfigurationChangeNotification( TimeZoneDetection time_zone_detection = TimeZoneDetection::kSkip); /** * Notification that the embedder has changed the locale. V8 keeps a cache of * various values used for locale computation. This notification will reset * those cached values for the current context so that locale configuration * changes would be reflected. * * This API should not be called more than needed as it will negatively impact * the performance of locale operations. */ void LocaleConfigurationChangeNotification(); Isolate() = delete; ~Isolate() = delete; Isolate(const Isolate&) = delete; Isolate& operator=(const Isolate&) = delete; // Deleting operator new and delete here is allowed as ctor and dtor is also // deleted. void* operator new(size_t size) = delete; void* operator new[](size_t size) = delete; void operator delete(void*, size_t) = delete; void operator delete[](void*, size_t) = delete; private: template <class K, class V, class Traits> friend class PersistentValueMapBase; internal::Address* GetDataFromSnapshotOnce(size_t index); void ReportExternalAllocationLimitReached(); }; class V8_EXPORT StartupData { public: /** * Whether the data created can be rehashed and and the hash seed can be * recomputed when deserialized. * Only valid for StartupData returned by SnapshotCreator::CreateBlob(). */ bool CanBeRehashed() const; const char* data; int raw_size; }; /** * EntropySource is used as a callback function when v8 needs a source * of entropy. */ typedef bool (*EntropySource)(unsigned char* buffer, size_t length); /** * ReturnAddressLocationResolver is used as a callback function when v8 is * resolving the location of a return address on the stack. Profilers that * change the return address on the stack can use this to resolve the stack * location to wherever the profiler stashed the original return address. * * \param return_addr_location A location on stack where a machine * return address resides. * \returns Either return_addr_location, or else a pointer to the profiler's * copy of the original return address. * * \note The resolver function must not cause garbage collection. */ typedef uintptr_t (*ReturnAddressLocationResolver)( uintptr_t return_addr_location); /** * Container class for static utility functions. */ class V8_EXPORT V8 { public: /** * Hand startup data to V8, in case the embedder has chosen to build * V8 with external startup data. * * Note: * - By default the startup data is linked into the V8 library, in which * case this function is not meaningful. * - If this needs to be called, it needs to be called before V8 * tries to make use of its built-ins. * - To avoid unnecessary copies of data, V8 will point directly into the * given data blob, so pretty please keep it around until V8 exit. * - Compression of the startup blob might be useful, but needs to * handled entirely on the embedders' side. * - The call will abort if the data is invalid. */ static void SetSnapshotDataBlob(StartupData* startup_blob); /** Set the callback to invoke in case of Dcheck failures. */ static void SetDcheckErrorHandler(DcheckErrorCallback that); /** * Sets V8 flags from a string. */ static void SetFlagsFromString(const char* str); static void SetFlagsFromString(const char* str, size_t length); /** * Sets V8 flags from the command line. */ static void SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags); /** Get the version string. */ static const char* GetVersion(); /** * Initializes V8. This function needs to be called before the first Isolate * is created. It always returns true. */ V8_INLINE static bool Initialize() { const int kBuildConfiguration = (internal::PointerCompressionIsEnabled() ? kPointerCompression : 0) | (internal::SmiValuesAre31Bits() ? k31BitSmis : 0) | (internal::HeapSandboxIsEnabled() ? kHeapSandbox : 0); return Initialize(kBuildConfiguration); } /** * Allows the host application to provide a callback which can be used * as a source of entropy for random number generators. */ static void SetEntropySource(EntropySource source); /** * Allows the host application to provide a callback that allows v8 to * cooperate with a profiler that rewrites return addresses on stack. */ static void SetReturnAddressLocationResolver( ReturnAddressLocationResolver return_address_resolver); /** * Releases any resources used by v8 and stops any utility threads * that may be running. Note that disposing v8 is permanent, it * cannot be reinitialized. * * It should generally not be necessary to dispose v8 before exiting * a process, this should happen automatically. It is only necessary * to use if the process needs the resources taken up by v8. */ static bool Dispose(); /** * Initialize the ICU library bundled with V8. The embedder should only * invoke this method when using the bundled ICU. Returns true on success. * * If V8 was compiled with the ICU data in an external file, the location * of the data file has to be provided. */ static bool InitializeICU(const char* icu_data_file = nullptr); /** * Initialize the ICU library bundled with V8. The embedder should only * invoke this method when using the bundled ICU. If V8 was compiled with * the ICU data in an external file and when the default location of that * file should be used, a path to the executable must be provided. * Returns true on success. * * The default is a file called icudtl.dat side-by-side with the executable. * * Optionally, the location of the data file can be provided to override the * default. */ static bool InitializeICUDefaultLocation(const char* exec_path, const char* icu_data_file = nullptr); /** * Initialize the external startup data. The embedder only needs to * invoke this method when external startup data was enabled in a build. * * If V8 was compiled with the startup data in an external file, then * V8 needs to be given those external files during startup. There are * three ways to do this: * - InitializeExternalStartupData(const char*) * This will look in the given directory for the file "snapshot_blob.bin". * - InitializeExternalStartupDataFromFile(const char*) * As above, but will directly use the given file name. * - Call SetSnapshotDataBlob. * This will read the blobs from the given data structure and will * not perform any file IO. */ static void InitializeExternalStartupData(const char* directory_path); static void InitializeExternalStartupDataFromFile(const char* snapshot_blob); /** * Sets the v8::Platform to use. This should be invoked before V8 is * initialized. */ static void InitializePlatform(Platform* platform); /** * Clears all references to the v8::Platform. This should be invoked after * V8 was disposed. */ static void ShutdownPlatform(); #if V8_OS_POSIX /** * Give the V8 signal handler a chance to handle a fault. * * This function determines whether a memory access violation can be recovered * by V8. If so, it will return true and modify context to return to a code * fragment that can recover from the fault. Otherwise, TryHandleSignal will * return false. * * The parameters to this function correspond to those passed to a Linux * signal handler. * * \param signal_number The signal number. * * \param info A pointer to the siginfo_t structure provided to the signal * handler. * * \param context The third argument passed to the Linux signal handler, which * points to a ucontext_t structure. */ V8_DEPRECATE_SOON("Use TryHandleWebAssemblyTrapPosix") static bool TryHandleSignal(int signal_number, void* info, void* context); #endif // V8_OS_POSIX /** * Activate trap-based bounds checking for WebAssembly. * * \param use_v8_signal_handler Whether V8 should install its own signal * handler or rely on the embedder's. */ static bool EnableWebAssemblyTrapHandler(bool use_v8_signal_handler); #if defined(V8_OS_WIN) /** * On Win64, by default V8 does not emit unwinding data for jitted code, * which means the OS cannot walk the stack frames and the system Structured * Exception Handling (SEH) cannot unwind through V8-generated code: * https://code.google.com/p/v8/issues/detail?id=3598. * * This function allows embedders to register a custom exception handler for * exceptions in V8-generated code. */ static void SetUnhandledExceptionCallback( UnhandledExceptionCallback unhandled_exception_callback); #endif /** * Get statistics about the shared memory usage. */ static void GetSharedMemoryStatistics(SharedMemoryStatistics* statistics); private: V8(); enum BuildConfigurationFeatures { kPointerCompression = 1 << 0, k31BitSmis = 1 << 1, kHeapSandbox = 1 << 2, }; /** * Checks that the embedder build configuration is compatible with * the V8 binary and if so initializes V8. */ static bool Initialize(int build_config); static internal::Address* GlobalizeReference(internal::Isolate* isolate, internal::Address* handle); static internal::Address* GlobalizeTracedReference(internal::Isolate* isolate, internal::Address* handle, internal::Address* slot, bool has_destructor); static void MoveGlobalReference(internal::Address** from, internal::Address** to); static void MoveTracedGlobalReference(internal::Address** from, internal::Address** to); static void CopyTracedGlobalReference(const internal::Address* const* from, internal::Address** to); static internal::Address* CopyGlobalReference(internal::Address* from); static void DisposeGlobal(internal::Address* global_handle); static void DisposeTracedGlobal(internal::Address* global_handle); static void MakeWeak(internal::Address* location, void* data, WeakCallbackInfo<void>::Callback weak_callback, WeakCallbackType type); static void MakeWeak(internal::Address** location_addr); static void* ClearWeak(internal::Address* location); static void SetFinalizationCallbackTraced( internal::Address* location, void* parameter, WeakCallbackInfo<void>::Callback callback); static void AnnotateStrongRetainer(internal::Address* location, const char* label); static Value* Eternalize(Isolate* isolate, Value* handle); template <class K, class V, class T> friend class PersistentValueMapBase; static void FromJustIsNothing(); static void ToLocalEmpty(); static void InternalFieldOutOfBounds(int index); template <class T> friend class Global; template <class T> friend class Local; template <class T> friend class MaybeLocal; template <class T> friend class Maybe; template <class T> friend class TracedReferenceBase; template <class T> friend class TracedGlobal; template <class T> friend class TracedReference; template <class T> friend class WeakCallbackInfo; template <class T> friend class Eternal; template <class T> friend class PersistentBase; template <class T, class M> friend class Persistent; friend class Context; }; /** * Helper class to create a snapshot data blob. * * The Isolate used by a SnapshotCreator is owned by it, and will be entered * and exited by the constructor and destructor, respectively; The destructor * will also destroy the Isolate. Experimental language features, including * those available by default, are not available while creating a snapshot. */ class V8_EXPORT SnapshotCreator { public: enum class FunctionCodeHandling { kClear, kKeep }; /** * Initialize and enter an isolate, and set it up for serialization. * The isolate is either created from scratch or from an existing snapshot. * The caller keeps ownership of the argument snapshot. * \param existing_blob existing snapshot from which to create this one. * \param external_references a null-terminated array of external references * that must be equivalent to CreateParams::external_references. */ SnapshotCreator(Isolate* isolate, const intptr_t* external_references = nullptr, StartupData* existing_blob = nullptr); /** * Create and enter an isolate, and set it up for serialization. * The isolate is either created from scratch or from an existing snapshot. * The caller keeps ownership of the argument snapshot. * \param existing_blob existing snapshot from which to create this one. * \param external_references a null-terminated array of external references * that must be equivalent to CreateParams::external_references. */ SnapshotCreator(const intptr_t* external_references = nullptr, StartupData* existing_blob = nullptr); /** * Destroy the snapshot creator, and exit and dispose of the Isolate * associated with it. */ ~SnapshotCreator(); /** * \returns the isolate prepared by the snapshot creator. */ Isolate* GetIsolate(); /** * Set the default context to be included in the snapshot blob. * The snapshot will not contain the global proxy, and we expect one or a * global object template to create one, to be provided upon deserialization. * * \param callback optional callback to serialize internal fields. */ void SetDefaultContext(Local<Context> context, SerializeInternalFieldsCallback callback = SerializeInternalFieldsCallback()); /** * Add additional context to be included in the snapshot blob. * The snapshot will include the global proxy. * * \param callback optional callback to serialize internal fields. * * \returns the index of the context in the snapshot blob. */ size_t AddContext(Local<Context> context, SerializeInternalFieldsCallback callback = SerializeInternalFieldsCallback()); /** * Attach arbitrary V8::Data to the context snapshot, which can be retrieved * via Context::GetDataFromSnapshot after deserialization. This data does not * survive when a new snapshot is created from an existing snapshot. * \returns the index for retrieval. */ template <class T> V8_INLINE size_t AddData(Local<Context> context, Local<T> object); /** * Attach arbitrary V8::Data to the isolate snapshot, which can be retrieved * via Isolate::GetDataFromSnapshot after deserialization. This data does not * survive when a new snapshot is created from an existing snapshot. * \returns the index for retrieval. */ template <class T> V8_INLINE size_t AddData(Local<T> object); /** * Created a snapshot data blob. * This must not be called from within a handle scope. * \param function_code_handling whether to include compiled function code * in the snapshot. * \returns { nullptr, 0 } on failure, and a startup snapshot on success. The * caller acquires ownership of the data array in the return value. */ StartupData CreateBlob(FunctionCodeHandling function_code_handling); // Disallow copying and assigning. SnapshotCreator(const SnapshotCreator&) = delete; void operator=(const SnapshotCreator&) = delete; private: size_t AddData(Local<Context> context, internal::Address object); size_t AddData(internal::Address object); void* data_; }; /** * A simple Maybe type, representing an object which may or may not have a * value, see https://hackage.haskell.org/package/base/docs/Data-Maybe.html. * * If an API method returns a Maybe<>, the API method can potentially fail * either because an exception is thrown, or because an exception is pending, * e.g. because a previous API call threw an exception that hasn't been caught * yet, or because a TerminateExecution exception was thrown. In that case, a * "Nothing" value is returned. */ template <class T> class Maybe { public: V8_INLINE bool IsNothing() const { return !has_value_; } V8_INLINE bool IsJust() const { return has_value_; } /** * An alias for |FromJust|. Will crash if the Maybe<> is nothing. */ V8_INLINE T ToChecked() const { return FromJust(); } /** * Short-hand for ToChecked(), which doesn't return a value. To be used, where * the actual value of the Maybe is not needed like Object::Set. */ V8_INLINE void Check() const { if (V8_UNLIKELY(!IsJust())) V8::FromJustIsNothing(); } /** * Converts this Maybe<> to a value of type T. If this Maybe<> is * nothing (empty), |false| is returned and |out| is left untouched. */ V8_WARN_UNUSED_RESULT V8_INLINE bool To(T* out) const { if (V8_LIKELY(IsJust())) *out = value_; return IsJust(); } /** * Converts this Maybe<> to a value of type T. If this Maybe<> is * nothing (empty), V8 will crash the process. */ V8_INLINE T FromJust() const { if (V8_UNLIKELY(!IsJust())) V8::FromJustIsNothing(); return value_; } /** * Converts this Maybe<> to a value of type T, using a default value if this * Maybe<> is nothing (empty). */ V8_INLINE T FromMaybe(const T& default_value) const { return has_value_ ? value_ : default_value; } V8_INLINE bool operator==(const Maybe& other) const { return (IsJust() == other.IsJust()) && (!IsJust() || FromJust() == other.FromJust()); } V8_INLINE bool operator!=(const Maybe& other) const { return !operator==(other); } private: Maybe() : has_value_(false) {} explicit Maybe(const T& t) : has_value_(true), value_(t) {} bool has_value_; T value_; template <class U> friend Maybe<U> Nothing(); template <class U> friend Maybe<U> Just(const U& u); }; template <class T> inline Maybe<T> Nothing() { return Maybe<T>(); } template <class T> inline Maybe<T> Just(const T& t) { return Maybe<T>(t); } // A template specialization of Maybe<T> for the case of T = void. template <> class Maybe<void> { public: V8_INLINE bool IsNothing() const { return !is_valid_; } V8_INLINE bool IsJust() const { return is_valid_; } V8_INLINE bool operator==(const Maybe& other) const { return IsJust() == other.IsJust(); } V8_INLINE bool operator!=(const Maybe& other) const { return !operator==(other); } private: struct JustTag {}; Maybe() : is_valid_(false) {} explicit Maybe(JustTag) : is_valid_(true) {} bool is_valid_; template <class U> friend Maybe<U> Nothing(); friend Maybe<void> JustVoid(); }; inline Maybe<void> JustVoid() { return Maybe<void>(Maybe<void>::JustTag()); } /** * An external exception handler. */ class V8_EXPORT TryCatch { public: /** * Creates a new try/catch block and registers it with v8. Note that * all TryCatch blocks should be stack allocated because the memory * location itself is compared against JavaScript try/catch blocks. */ explicit TryCatch(Isolate* isolate); /** * Unregisters and deletes this try/catch block. */ ~TryCatch(); /** * Returns true if an exception has been caught by this try/catch block. */ bool HasCaught() const; /** * For certain types of exceptions, it makes no sense to continue execution. * * If CanContinue returns false, the correct action is to perform any C++ * cleanup needed and then return. If CanContinue returns false and * HasTerminated returns true, it is possible to call * CancelTerminateExecution in order to continue calling into the engine. */ bool CanContinue() const; /** * Returns true if an exception has been caught due to script execution * being terminated. * * There is no JavaScript representation of an execution termination * exception. Such exceptions are thrown when the TerminateExecution * methods are called to terminate a long-running script. * * If such an exception has been thrown, HasTerminated will return true, * indicating that it is possible to call CancelTerminateExecution in order * to continue calling into the engine. */ bool HasTerminated() const; /** * Throws the exception caught by this TryCatch in a way that avoids * it being caught again by this same TryCatch. As with ThrowException * it is illegal to execute any JavaScript operations after calling * ReThrow; the caller must return immediately to where the exception * is caught. */ Local<Value> ReThrow(); /** * Returns the exception caught by this try/catch block. If no exception has * been caught an empty handle is returned. * * The returned handle is valid until this TryCatch block has been destroyed. */ Local<Value> Exception() const; /** * Returns the .stack property of an object. If no .stack * property is present an empty handle is returned. */ V8_WARN_UNUSED_RESULT static MaybeLocal<Value> StackTrace( Local<Context> context, Local<Value> exception); /** * Returns the .stack property of the thrown object. If no .stack property is * present or if this try/catch block has not caught an exception, an empty * handle is returned. */ V8_WARN_UNUSED_RESULT MaybeLocal<Value> StackTrace( Local<Context> context) const; /** * Returns the message associated with this exception. If there is * no message associated an empty handle is returned. * * The returned handle is valid until this TryCatch block has been * destroyed. */ Local<v8::Message> Message() const; /** * Clears any exceptions that may have been caught by this try/catch block. * After this method has been called, HasCaught() will return false. Cancels * the scheduled exception if it is caught and ReThrow() is not called before. * * It is not necessary to clear a try/catch block before using it again; if * another exception is thrown the previously caught exception will just be * overwritten. However, it is often a good idea since it makes it easier * to determine which operation threw a given exception. */ void Reset(); /** * Set verbosity of the external exception handler. * * By default, exceptions that are caught by an external exception * handler are not reported. Call SetVerbose with true on an * external exception handler to have exceptions caught by the * handler reported as if they were not caught. */ void SetVerbose(bool value); /** * Returns true if verbosity is enabled. */ bool IsVerbose() const; /** * Set whether or not this TryCatch should capture a Message object * which holds source information about where the exception * occurred. True by default. */ void SetCaptureMessage(bool value); /** * There are cases when the raw address of C++ TryCatch object cannot be * used for comparisons with addresses into the JS stack. The cases are: * 1) ARM, ARM64 and MIPS simulators which have separate JS stack. * 2) Address sanitizer allocates local C++ object in the heap when * UseAfterReturn mode is enabled. * This method returns address that can be used for comparisons with * addresses into the JS stack. When neither simulator nor ASAN's * UseAfterReturn is enabled, then the address returned will be the address * of the C++ try catch handler itself. */ static void* JSStackComparableAddress(TryCatch* handler) { if (handler == nullptr) return nullptr; return handler->js_stack_comparable_address_; } TryCatch(const TryCatch&) = delete; void operator=(const TryCatch&) = delete; private: // Declaring operator new and delete as deleted is not spec compliant. // Therefore declare them private instead to disable dynamic alloc void* operator new(size_t size); void* operator new[](size_t size); void operator delete(void*, size_t); void operator delete[](void*, size_t); void ResetInternal(); internal::Isolate* isolate_; TryCatch* next_; void* exception_; void* message_obj_; void* js_stack_comparable_address_; bool is_verbose_ : 1; bool can_continue_ : 1; bool capture_message_ : 1; bool rethrow_ : 1; bool has_terminated_ : 1; friend class internal::Isolate; }; // --- Context --- /** * A container for extension names. */ class V8_EXPORT ExtensionConfiguration { public: ExtensionConfiguration() : name_count_(0), names_(nullptr) {} ExtensionConfiguration(int name_count, const char* names[])  : name_count_(name_count), names_(names) { } const char** begin() const { return &names_[0]; } const char** end() const { return &names_[name_count_]; } private: const int name_count_; const char** names_; }; /** * A sandboxed execution context with its own set of built-in objects * and functions. */ class V8_EXPORT Context { public: /** * Returns the global proxy object. * * Global proxy object is a thin wrapper whose prototype points to actual * context's global object with the properties like Object, etc. This is done * that way for security reasons (for more details see * https://wiki.mozilla.org/Gecko:SplitWindow). * * Please note that changes to global proxy object prototype most probably * would break VM---v8 expects only global object as a prototype of global * proxy object. */ Local<Object> Global(); /** * Detaches the global object from its context before * the global object can be reused to create a new context. */ void DetachGlobal(); /** * Creates a new context and returns a handle to the newly allocated * context. * * \param isolate The isolate in which to create the context. * * \param extensions An optional extension configuration containing * the extensions to be installed in the newly created context. * * \param global_template An optional object template from which the * global object for the newly created context will be created. * * \param global_object An optional global object to be reused for * the newly created context. This global object must have been * created by a previous call to Context::New with the same global * template. The state of the global object will be completely reset * and only object identify will remain. */ static Local<Context> New( Isolate* isolate, ExtensionConfiguration* extensions = nullptr, MaybeLocal<ObjectTemplate> global_template = MaybeLocal<ObjectTemplate>(), MaybeLocal<Value> global_object = MaybeLocal<Value>(), DeserializeInternalFieldsCallback internal_fields_deserializer = DeserializeInternalFieldsCallback(), MicrotaskQueue* microtask_queue = nullptr); /** * Create a new context from a (non-default) context snapshot. There * is no way to provide a global object template since we do not create * a new global object from template, but we can reuse a global object. * * \param isolate See v8::Context::New. * * \param context_snapshot_index The index of the context snapshot to * deserialize from. Use v8::Context::New for the default snapshot. * * \param embedder_fields_deserializer Optional callback to deserialize * internal fields. It should match the SerializeInternalFieldCallback used * to serialize. * * \param extensions See v8::Context::New. * * \param global_object See v8::Context::New. */ static MaybeLocal<Context> FromSnapshot( Isolate* isolate, size_t context_snapshot_index, DeserializeInternalFieldsCallback embedder_fields_deserializer = DeserializeInternalFieldsCallback(), ExtensionConfiguration* extensions = nullptr, MaybeLocal<Value> global_object = MaybeLocal<Value>(), MicrotaskQueue* microtask_queue = nullptr); /** * Returns an global object that isn't backed by an actual context. * * The global template needs to have access checks with handlers installed. * If an existing global object is passed in, the global object is detached * from its context. * * Note that this is different from a detached context where all accesses to * the global proxy will fail. Instead, the access check handlers are invoked. * * It is also not possible to detach an object returned by this method. * Instead, the access check handlers need to return nothing to achieve the * same effect. * * It is possible, however, to create a new context from the global object * returned by this method. */ static MaybeLocal<Object> NewRemoteContext( Isolate* isolate, Local<ObjectTemplate> global_template, MaybeLocal<Value> global_object = MaybeLocal<Value>()); /** * Sets the security token for the context. To access an object in * another context, the security tokens must match. */ void SetSecurityToken(Local<Value> token); /** Restores the security token to the default value. */ void UseDefaultSecurityToken(); /** Returns the security token of this context.*/ Local<Value> GetSecurityToken(); /** * Enter this context. After entering a context, all code compiled * and run is compiled and run in this context. If another context * is already entered, this old context is saved so it can be * restored when the new context is exited. */ void Enter(); /** * Exit this context. Exiting the current context restores the * context that was in place when entering the current context. */ void Exit(); /** Returns an isolate associated with a current context. */ Isolate* GetIsolate(); /** * The field at kDebugIdIndex used to be reserved for the inspector. * It now serves no purpose. */ enum EmbedderDataFields { kDebugIdIndex = 0 }; /** * Return the number of fields allocated for embedder data. */ uint32_t GetNumberOfEmbedderDataFields(); /** * Gets the embedder data with the given index, which must have been set by a * previous call to SetEmbedderData with the same index. */ V8_INLINE Local<Value> GetEmbedderData(int index); /** * Gets the binding object used by V8 extras. Extra natives get a reference * to this object and can use it to "export" functionality by adding * properties. Extra natives can also "import" functionality by accessing * properties added by the embedder using the V8 API. */ Local<Object> GetExtrasBindingObject(); /** * Sets the embedder data with the given index, growing the data as * needed. Note that index 0 currently has a special meaning for Chrome's * debugger. */ void SetEmbedderData(int index, Local<Value> value); /** * Gets a 2-byte-aligned native pointer from the embedder data with the given * index, which must have been set by a previous call to * SetAlignedPointerInEmbedderData with the same index. Note that index 0 * currently has a special meaning for Chrome's debugger. */ V8_INLINE void* GetAlignedPointerFromEmbedderData(int index); /** * Sets a 2-byte-aligned native pointer in the embedder data with the given * index, growing the data as needed. Note that index 0 currently has a * special meaning for Chrome's debugger. */ void SetAlignedPointerInEmbedderData(int index, void* value); /** * Control whether code generation from strings is allowed. Calling * this method with false will disable 'eval' and the 'Function' * constructor for code running in this context. If 'eval' or the * 'Function' constructor are used an exception will be thrown. * * If code generation from strings is not allowed the * V8::AllowCodeGenerationFromStrings callback will be invoked if * set before blocking the call to 'eval' or the 'Function' * constructor. If that callback returns true, the call will be * allowed, otherwise an exception will be thrown. If no callback is * set an exception will be thrown. */ void AllowCodeGenerationFromStrings(bool allow); /** * Returns true if code generation from strings is allowed for the context. * For more details see AllowCodeGenerationFromStrings(bool) documentation. */ bool IsCodeGenerationFromStringsAllowed(); /** * Sets the error description for the exception that is thrown when * code generation from strings is not allowed and 'eval' or the 'Function' * constructor are called. */ void SetErrorMessageForCodeGenerationFromStrings(Local<String> message); /** * Return data that was previously attached to the context snapshot via * SnapshotCreator, and removes the reference to it. * Repeated call with the same index returns an empty MaybeLocal. */ template <class T> V8_INLINE MaybeLocal<T> GetDataFromSnapshotOnce(size_t index); /** * If callback is set, abort any attempt to execute JavaScript in this * context, call the specified callback, and throw an exception. * To unset abort, pass nullptr as callback. */ typedef void (*AbortScriptExecutionCallback)(Isolate* isolate, Local<Context> context); void SetAbortScriptExecution(AbortScriptExecutionCallback callback); /** * Returns the value that was set or restored by * SetContinuationPreservedEmbedderData(), if any. */ Local<Value> GetContinuationPreservedEmbedderData() const; /** * Sets a value that will be stored on continuations and reset while the * continuation runs. */ void SetContinuationPreservedEmbedderData(Local<Value> context); /** * Stack-allocated class which sets the execution context for all * operations executed within a local scope. */ class Scope { public: explicit V8_INLINE Scope(Local<Context> context) : context_(context) { context_->Enter(); } V8_INLINE ~Scope() { context_->Exit(); } private: Local<Context> context_; }; /** * Stack-allocated class to support the backup incumbent settings object * stack. * https://html.spec.whatwg.org/multipage/webappapis.html#backup-incumbent-settings-object-stack */ class V8_EXPORT BackupIncumbentScope final { public: /** * |backup_incumbent_context| is pushed onto the backup incumbent settings * object stack. */ explicit BackupIncumbentScope(Local<Context> backup_incumbent_context); ~BackupIncumbentScope(); /** * Returns address that is comparable with JS stack address. Note that JS * stack may be allocated separately from the native stack. See also * |TryCatch::JSStackComparableAddress| for details. */ uintptr_t JSStackComparableAddress() const { return js_stack_comparable_address_; } private: friend class internal::Isolate; Local<Context> backup_incumbent_context_; uintptr_t js_stack_comparable_address_ = 0; const BackupIncumbentScope* prev_ = nullptr; }; private: friend class Value; friend class Script; friend class Object; friend class Function; internal::Address* GetDataFromSnapshotOnce(size_t index); Local<Value> SlowGetEmbedderData(int index); void* SlowGetAlignedPointerFromEmbedderData(int index); }; /** * Multiple threads in V8 are allowed, but only one thread at a time is allowed * to use any given V8 isolate, see the comments in the Isolate class. The * definition of 'using a V8 isolate' includes accessing handles or holding onto * object pointers obtained from V8 handles while in the particular V8 isolate. * It is up to the user of V8 to ensure, perhaps with locking, that this * constraint is not violated. In addition to any other synchronization * mechanism that may be used, the v8::Locker and v8::Unlocker classes must be * used to signal thread switches to V8. * * v8::Locker is a scoped lock object. While it's active, i.e. between its * construction and destruction, the current thread is allowed to use the locked * isolate. V8 guarantees that an isolate can be locked by at most one thread at * any time. In other words, the scope of a v8::Locker is a critical section. * * Sample usage: * \code * ... * { * v8::Locker locker(isolate); * v8::Isolate::Scope isolate_scope(isolate); * ... * // Code using V8 and isolate goes here. * ... * } // Destructor called here * \endcode * * If you wish to stop using V8 in a thread A you can do this either by * destroying the v8::Locker object as above or by constructing a v8::Unlocker * object: * * \code * { * isolate->Exit(); * v8::Unlocker unlocker(isolate); * ... * // Code not using V8 goes here while V8 can run in another thread. * ... * } // Destructor called here. * isolate->Enter(); * \endcode * * The Unlocker object is intended for use in a long-running callback from V8, * where you want to release the V8 lock for other threads to use. * * The v8::Locker is a recursive lock, i.e. you can lock more than once in a * given thread. This can be useful if you have code that can be called either * from code that holds the lock or from code that does not. The Unlocker is * not recursive so you can not have several Unlockers on the stack at once, and * you can not use an Unlocker in a thread that is not inside a Locker's scope. * * An unlocker will unlock several lockers if it has to and reinstate the * correct depth of locking on its destruction, e.g.: * * \code * // V8 not locked. * { * v8::Locker locker(isolate); * Isolate::Scope isolate_scope(isolate); * // V8 locked. * { * v8::Locker another_locker(isolate); * // V8 still locked (2 levels). * { * isolate->Exit(); * v8::Unlocker unlocker(isolate); * // V8 not locked. * } * isolate->Enter(); * // V8 locked again (2 levels). * } * // V8 still locked (1 level). * } * // V8 Now no longer locked. * \endcode */ class V8_EXPORT Unlocker { public: /** * Initialize Unlocker for a given Isolate. */ V8_INLINE explicit Unlocker(Isolate* isolate) { Initialize(isolate); } ~Unlocker(); private: void Initialize(Isolate* isolate); internal::Isolate* isolate_; }; class V8_EXPORT Locker { public: /** * Initialize Locker for a given Isolate. */ V8_INLINE explicit Locker(Isolate* isolate) { Initialize(isolate); } ~Locker(); /** * Returns whether or not the locker for a given isolate, is locked by the * current thread. */ static bool IsLocked(Isolate* isolate); /** * Returns whether v8::Locker is being used by this V8 instance. */ static bool IsActive(); // Disallow copying and assigning. Locker(const Locker&) = delete; void operator=(const Locker&) = delete; private: void Initialize(Isolate* isolate); bool has_lock_; bool top_level_; internal::Isolate* isolate_; }; /** * Various helpers for skipping over V8 frames in a given stack. * * The unwinder API is only supported on the x64, ARM64 and ARM32 architectures. */ class V8_EXPORT Unwinder { public: /** * Attempt to unwind the stack to the most recent C++ frame. This function is * signal-safe and does not access any V8 state and thus doesn't require an * Isolate. * * The unwinder needs to know the location of the JS Entry Stub (a piece of * code that is run when C++ code calls into generated JS code). This is used * for edge cases where the current frame is being constructed or torn down * when the stack sample occurs. * * The unwinder also needs the virtual memory range of all possible V8 code * objects. There are two ranges required - the heap code range and the range * for code embedded in the binary. The V8 API provides all required inputs * via an UnwindState object through the Isolate::GetUnwindState() API. These * values will not change after Isolate initialization, so the same * |unwind_state| can be used for multiple calls. * * \param unwind_state Input state for the Isolate that the stack comes from. * \param register_state The current registers. This is an in-out param that * will be overwritten with the register values after unwinding, on success. * \param stack_base The resulting stack pointer and frame pointer values are * bounds-checked against the stack_base and the original stack pointer value * to ensure that they are valid locations in the given stack. If these values * or any intermediate frame pointer values used during unwinding are ever out * of these bounds, unwinding will fail. * * \return True on success. */ // TODO(petermarshall): Remove this API V8_DEPRECATED("Use entry_stubs + code_pages version.") static bool TryUnwindV8Frames(const UnwindState& unwind_state, RegisterState* register_state, const void* stack_base); /** * The same as above, but is available on x64, ARM64 and ARM32. * * \param code_pages A list of all of the ranges in which V8 has allocated * executable code. The caller should obtain this list by calling * Isolate::CopyCodePages() during the same interrupt/thread suspension that * captures the stack. */ static bool TryUnwindV8Frames(const JSEntryStubs& entry_stubs, size_t code_pages_length, const MemoryRange* code_pages, RegisterState* register_state, const void* stack_base); /** * Whether the PC is within the V8 code range represented by code_range or * embedded_code_range in |unwind_state|. * * If this returns false, then calling UnwindV8Frames() with the same PC * and unwind_state will always fail. If it returns true, then unwinding may * (but not necessarily) be successful. */ // TODO(petermarshall): Remove this API V8_DEPRECATED("Use code_pages version.") static bool PCIsInV8(const UnwindState& unwind_state, void* pc); /** * The same as above, but is available on x64, ARM64 and ARM32. See the * comment on TryUnwindV8Frames. */ static bool PCIsInV8(size_t code_pages_length, const MemoryRange* code_pages, void* pc); }; // --- Implementation --- template <class T> Local<T> Local<T>::New(Isolate* isolate, Local<T> that) { return New(isolate, that.val_); } template <class T> Local<T> Local<T>::New(Isolate* isolate, const PersistentBase<T>& that) { return New(isolate, that.val_); } template <class T> Local<T> Local<T>::New(Isolate* isolate, const TracedReferenceBase<T>& that) { return New(isolate, that.val_); } template <class T> Local<T> Local<T>::New(Isolate* isolate, T* that) { if (that == nullptr) return Local<T>(); T* that_ptr = that; internal::Address* p = reinterpret_cast<internal::Address*>(that_ptr); return Local<T>(reinterpret_cast<T*>(HandleScope::CreateHandle( reinterpret_cast<internal::Isolate*>(isolate), *p))); } template<class T> template<class S> void Eternal<T>::Set(Isolate* isolate, Local<S> handle) { static_assert(std::is_base_of<T, S>::value, "type check"); val_ = reinterpret_cast<T*>( V8::Eternalize(isolate, reinterpret_cast<Value*>(*handle))); } template <class T> Local<T> Eternal<T>::Get(Isolate* isolate) const { // The eternal handle will never go away, so as with the roots, we don't even // need to open a handle. return Local<T>(val_); } template <class T> Local<T> MaybeLocal<T>::ToLocalChecked() { if (V8_UNLIKELY(val_ == nullptr)) V8::ToLocalEmpty(); return Local<T>(val_); } template <class T> void* WeakCallbackInfo<T>::GetInternalField(int index) const { #ifdef V8_ENABLE_CHECKS if (index < 0 || index >= kEmbedderFieldsInWeakCallback) { V8::InternalFieldOutOfBounds(index); } #endif return embedder_fields_[index]; } template <class T> T* PersistentBase<T>::New(Isolate* isolate, T* that) { if (that == nullptr) return nullptr; internal::Address* p = reinterpret_cast<internal::Address*>(that); return reinterpret_cast<T*>( V8::GlobalizeReference(reinterpret_cast<internal::Isolate*>(isolate), p)); } template <class T, class M> template <class S, class M2> void Persistent<T, M>::Copy(const Persistent<S, M2>& that) { static_assert(std::is_base_of<T, S>::value, "type check"); this->Reset(); if (that.IsEmpty()) return; internal::Address* p = reinterpret_cast<internal::Address*>(that.val_); this->val_ = reinterpret_cast<T*>(V8::CopyGlobalReference(p)); M::Copy(that, this); } template <class T> bool PersistentBase<T>::IsWeak() const { typedef internal::Internals I; if (this->IsEmpty()) return false; return I::GetNodeState(reinterpret_cast<internal::Address*>(this->val_)) == I::kNodeStateIsWeakValue; } template <class T> void PersistentBase<T>::Reset() { if (this->IsEmpty()) return; V8::DisposeGlobal(reinterpret_cast<internal::Address*>(this->val_)); val_ = nullptr; } template <class T> template <class S> void PersistentBase<T>::Reset(Isolate* isolate, const Local<S>& other) { static_assert(std::is_base_of<T, S>::value, "type check"); Reset(); if (other.IsEmpty()) return; this->val_ = New(isolate, other.val_); } template <class T> template <class S> void PersistentBase<T>::Reset(Isolate* isolate, const PersistentBase<S>& other) { static_assert(std::is_base_of<T, S>::value, "type check"); Reset(); if (other.IsEmpty()) return; this->val_ = New(isolate, other.val_); } template <class T> template <typename P> V8_INLINE void PersistentBase<T>::SetWeak( P* parameter, typename WeakCallbackInfo<P>::Callback callback, WeakCallbackType type) { typedef typename WeakCallbackInfo<void>::Callback Callback; V8::MakeWeak(reinterpret_cast<internal::Address*>(this->val_), parameter, reinterpret_cast<Callback>(callback), type); } template <class T> void PersistentBase<T>::SetWeak() { V8::MakeWeak(reinterpret_cast<internal::Address**>(&this->val_)); } template <class T> template <typename P> P* PersistentBase<T>::ClearWeak() { return reinterpret_cast<P*>( V8::ClearWeak(reinterpret_cast<internal::Address*>(this->val_))); } template <class T> void PersistentBase<T>::AnnotateStrongRetainer(const char* label) { V8::AnnotateStrongRetainer(reinterpret_cast<internal::Address*>(this->val_), label); } template <class T> void PersistentBase<T>::SetWrapperClassId(uint16_t class_id) { typedef internal::Internals I; if (this->IsEmpty()) return; internal::Address* obj = reinterpret_cast<internal::Address*>(this->val_); uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + I::kNodeClassIdOffset; *reinterpret_cast<uint16_t*>(addr) = class_id; } template <class T> uint16_t PersistentBase<T>::WrapperClassId() const { typedef internal::Internals I; if (this->IsEmpty()) return 0; internal::Address* obj = reinterpret_cast<internal::Address*>(this->val_); uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + I::kNodeClassIdOffset; return *reinterpret_cast<uint16_t*>(addr); } template <class T> Global<T>::Global(Global&& other) : PersistentBase<T>(other.val_) { if (other.val_ != nullptr) { V8::MoveGlobalReference(reinterpret_cast<internal::Address**>(&other.val_), reinterpret_cast<internal::Address**>(&this->val_)); other.val_ = nullptr; } } template <class T> template <class S> Global<T>& Global<T>::operator=(Global<S>&& rhs) { static_assert(std::is_base_of<T, S>::value, "type check"); if (this != &rhs) { this->Reset(); if (rhs.val_ != nullptr) { this->val_ = rhs.val_; V8::MoveGlobalReference( reinterpret_cast<internal::Address**>(&rhs.val_), reinterpret_cast<internal::Address**>(&this->val_)); rhs.val_ = nullptr; } } return *this; } template <class T> T* TracedReferenceBase<T>::New(Isolate* isolate, T* that, void* slot, DestructionMode destruction_mode) { if (that == nullptr) return nullptr; internal::Address* p = reinterpret_cast<internal::Address*>(that); return reinterpret_cast<T*>(V8::GlobalizeTracedReference( reinterpret_cast<internal::Isolate*>(isolate), p, reinterpret_cast<internal::Address*>(slot), destruction_mode == kWithDestructor)); } template <class T> void TracedReferenceBase<T>::Reset() { if (IsEmpty()) return; V8::DisposeTracedGlobal(reinterpret_cast<internal::Address*>(val_)); val_ = nullptr; } template <class T> template <class S> void TracedGlobal<T>::Reset(Isolate* isolate, const Local<S>& other) { static_assert(std::is_base_of<T, S>::value, "type check"); Reset(); if (other.IsEmpty()) return; this->val_ = this->New(isolate, other.val_, &this->val_, TracedReferenceBase<T>::kWithDestructor); } template <class T> template <class S> TracedGlobal<T>& TracedGlobal<T>::operator=(TracedGlobal<S>&& rhs) { static_assert(std::is_base_of<T, S>::value, "type check"); *this = std::move(rhs.template As<T>()); return *this; } template <class T> template <class S> TracedGlobal<T>& TracedGlobal<T>::operator=(const TracedGlobal<S>& rhs) { static_assert(std::is_base_of<T, S>::value, "type check"); *this = rhs.template As<T>(); return *this; } template <class T> TracedGlobal<T>& TracedGlobal<T>::operator=(TracedGlobal&& rhs) { if (this != &rhs) { V8::MoveTracedGlobalReference( reinterpret_cast<internal::Address**>(&rhs.val_), reinterpret_cast<internal::Address**>(&this->val_)); } return *this; } template <class T> TracedGlobal<T>& TracedGlobal<T>::operator=(const TracedGlobal& rhs) { if (this != &rhs) { this->Reset(); if (rhs.val_ != nullptr) { V8::CopyTracedGlobalReference( reinterpret_cast<const internal::Address* const*>(&rhs.val_), reinterpret_cast<internal::Address**>(&this->val_)); } } return *this; } template <class T> template <class S> void TracedReference<T>::Reset(Isolate* isolate, const Local<S>& other) { static_assert(std::is_base_of<T, S>::value, "type check"); Reset(); if (other.IsEmpty()) return; this->val_ = this->New(isolate, other.val_, &this->val_, TracedReferenceBase<T>::kWithoutDestructor); } template <class T> template <class S> TracedReference<T>& TracedReference<T>::operator=(TracedReference<S>&& rhs) { static_assert(std::is_base_of<T, S>::value, "type check"); *this = std::move(rhs.template As<T>()); return *this; } template <class T> template <class S> TracedReference<T>& TracedReference<T>::operator=( const TracedReference<S>& rhs) { static_assert(std::is_base_of<T, S>::value, "type check"); *this = rhs.template As<T>(); return *this; } template <class T> TracedReference<T>& TracedReference<T>::operator=(TracedReference&& rhs) { if (this != &rhs) { V8::MoveTracedGlobalReference( reinterpret_cast<internal::Address**>(&rhs.val_), reinterpret_cast<internal::Address**>(&this->val_)); } return *this; } template <class T> TracedReference<T>& TracedReference<T>::operator=(const TracedReference& rhs) { if (this != &rhs) { this->Reset(); if (rhs.val_ != nullptr) { V8::CopyTracedGlobalReference( reinterpret_cast<const internal::Address* const*>(&rhs.val_), reinterpret_cast<internal::Address**>(&this->val_)); } } return *this; } template <class T> void TracedReferenceBase<T>::SetWrapperClassId(uint16_t class_id) { typedef internal::Internals I; if (IsEmpty()) return; internal::Address* obj = reinterpret_cast<internal::Address*>(val_); uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + I::kNodeClassIdOffset; *reinterpret_cast<uint16_t*>(addr) = class_id; } template <class T> uint16_t TracedReferenceBase<T>::WrapperClassId() const { typedef internal::Internals I; if (IsEmpty()) return 0; internal::Address* obj = reinterpret_cast<internal::Address*>(val_); uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + I::kNodeClassIdOffset; return *reinterpret_cast<uint16_t*>(addr); } template <class T> void TracedGlobal<T>::SetFinalizationCallback( void* parameter, typename WeakCallbackInfo<void>::Callback callback) { V8::SetFinalizationCallbackTraced( reinterpret_cast<internal::Address*>(this->val_), parameter, callback); } template <typename T> ReturnValue<T>::ReturnValue(internal::Address* slot) : value_(slot) {} template <typename T> template <typename S> void ReturnValue<T>::Set(const Global<S>& handle) { static_assert(std::is_base_of<T, S>::value, "type check"); if (V8_UNLIKELY(handle.IsEmpty())) { *value_ = GetDefaultValue(); } else { *value_ = *reinterpret_cast<internal::Address*>(*handle); } } template <typename T> template <typename S> void ReturnValue<T>::Set(const TracedReferenceBase<S>& handle) { static_assert(std::is_base_of<T, S>::value, "type check"); if (V8_UNLIKELY(handle.IsEmpty())) { *value_ = GetDefaultValue(); } else { *value_ = *reinterpret_cast<internal::Address*>(handle.val_); } } template <typename T> template <typename S> void ReturnValue<T>::Set(const Local<S> handle) { static_assert(std::is_void<T>::value || std::is_base_of<T, S>::value, "type check"); if (V8_UNLIKELY(handle.IsEmpty())) { *value_ = GetDefaultValue(); } else { *value_ = *reinterpret_cast<internal::Address*>(*handle); } } template<typename T> void ReturnValue<T>::Set(double i) { static_assert(std::is_base_of<T, Number>::value, "type check"); Set(Number::New(GetIsolate(), i)); } template<typename T> void ReturnValue<T>::Set(int32_t i) { static_assert(std::is_base_of<T, Integer>::value, "type check"); typedef internal::Internals I; if (V8_LIKELY(I::IsValidSmi(i))) { *value_ = I::IntToSmi(i); return; } Set(Integer::New(GetIsolate(), i)); } template<typename T> void ReturnValue<T>::Set(uint32_t i) { static_assert(std::is_base_of<T, Integer>::value, "type check"); // Can't simply use INT32_MAX here for whatever reason. bool fits_into_int32_t = (i & (1U << 31)) == 0; if (V8_LIKELY(fits_into_int32_t)) { Set(static_cast<int32_t>(i)); return; } Set(Integer::NewFromUnsigned(GetIsolate(), i)); } template<typename T> void ReturnValue<T>::Set(bool value) { static_assert(std::is_base_of<T, Boolean>::value, "type check"); typedef internal::Internals I; int root_index; if (value) { root_index = I::kTrueValueRootIndex; } else { root_index = I::kFalseValueRootIndex; } *value_ = *I::GetRoot(GetIsolate(), root_index); } template<typename T> void ReturnValue<T>::SetNull() { static_assert(std::is_base_of<T, Primitive>::value, "type check"); typedef internal::Internals I; *value_ = *I::GetRoot(GetIsolate(), I::kNullValueRootIndex); } template<typename T> void ReturnValue<T>::SetUndefined() { static_assert(std::is_base_of<T, Primitive>::value, "type check"); typedef internal::Internals I; *value_ = *I::GetRoot(GetIsolate(), I::kUndefinedValueRootIndex); } template<typename T> void ReturnValue<T>::SetEmptyString() { static_assert(std::is_base_of<T, String>::value, "type check"); typedef internal::Internals I; *value_ = *I::GetRoot(GetIsolate(), I::kEmptyStringRootIndex); } template <typename T> Isolate* ReturnValue<T>::GetIsolate() const { // Isolate is always the pointer below the default value on the stack. return *reinterpret_cast<Isolate**>(&value_[-2]); } template <typename T> Local<Value> ReturnValue<T>::Get() const { typedef internal::Internals I; if (*value_ == *I::GetRoot(GetIsolate(), I::kTheHoleValueRootIndex)) return Local<Value>(*Undefined(GetIsolate())); return Local<Value>::New(GetIsolate(), reinterpret_cast<Value*>(value_)); } template <typename T> template <typename S> void ReturnValue<T>::Set(S* whatever) { static_assert(sizeof(S) < 0, "incompilable to prevent inadvertent misuse"); } template <typename T> internal::Address ReturnValue<T>::GetDefaultValue() { // Default value is always the pointer below value_ on the stack. return value_[-1]; } template <typename T> FunctionCallbackInfo<T>::FunctionCallbackInfo(internal::Address* implicit_args, internal::Address* values, int length)  : implicit_args_(implicit_args), values_(values), length_(length) {} template<typename T> Local<Value> FunctionCallbackInfo<T>::operator[](int i) const { // values_ points to the first argument (not the receiver). if (i < 0 || length_ <= i) return Local<Value>(*Undefined(GetIsolate())); #ifdef V8_REVERSE_JSARGS return Local<Value>(reinterpret_cast<Value*>(values_ + i)); #else return Local<Value>(reinterpret_cast<Value*>(values_ - i)); #endif } template<typename T> Local<Object> FunctionCallbackInfo<T>::This() const { // values_ points to the first argument (not the receiver). #ifdef V8_REVERSE_JSARGS return Local<Object>(reinterpret_cast<Object*>(values_ - 1)); #else return Local<Object>(reinterpret_cast<Object*>(values_ + 1)); #endif } template<typename T> Local<Object> FunctionCallbackInfo<T>::Holder() const { return Local<Object>(reinterpret_cast<Object*>( &implicit_args_[kHolderIndex])); } template <typename T> Local<Value> FunctionCallbackInfo<T>::NewTarget() const { return Local<Value>( reinterpret_cast<Value*>(&implicit_args_[kNewTargetIndex])); } template <typename T> Local<Value> FunctionCallbackInfo<T>::Data() const { return Local<Value>(reinterpret_cast<Value*>(&implicit_args_[kDataIndex])); } template<typename T> Isolate* FunctionCallbackInfo<T>::GetIsolate() const { return *reinterpret_cast<Isolate**>(&implicit_args_[kIsolateIndex]); } template<typename T> ReturnValue<T> FunctionCallbackInfo<T>::GetReturnValue() const { return ReturnValue<T>(&implicit_args_[kReturnValueIndex]); } template<typename T> bool FunctionCallbackInfo<T>::IsConstructCall() const { return !NewTarget()->IsUndefined(); } template<typename T> int FunctionCallbackInfo<T>::Length() const { return length_; } ScriptOrigin::ScriptOrigin(Local<Value> resource_name, Local<Integer> resource_line_offset, Local<Integer> resource_column_offset, Local<Boolean> resource_is_shared_cross_origin, Local<Integer> script_id, Local<Value> source_map_url, Local<Boolean> resource_is_opaque, Local<Boolean> is_wasm, Local<Boolean> is_module, Local<PrimitiveArray> host_defined_options)  : resource_name_(resource_name), resource_line_offset_(resource_line_offset), resource_column_offset_(resource_column_offset), options_(!resource_is_shared_cross_origin.IsEmpty() && resource_is_shared_cross_origin->IsTrue(), !resource_is_opaque.IsEmpty() && resource_is_opaque->IsTrue(), !is_wasm.IsEmpty() && is_wasm->IsTrue(), !is_module.IsEmpty() && is_module->IsTrue()), script_id_(script_id), source_map_url_(source_map_url), host_defined_options_(host_defined_options) {} Local<Value> ScriptOrigin::ResourceName() const { return resource_name_; } Local<PrimitiveArray> ScriptOrigin::HostDefinedOptions() const { return host_defined_options_; } Local<Integer> ScriptOrigin::ResourceLineOffset() const { return resource_line_offset_; } Local<Integer> ScriptOrigin::ResourceColumnOffset() const { return resource_column_offset_; } Local<Integer> ScriptOrigin::ScriptID() const { return script_id_; } Local<Value> ScriptOrigin::SourceMapUrl() const { return source_map_url_; } ScriptCompiler::Source::Source(Local<String> string, const ScriptOrigin& origin, CachedData* data)  : source_string(string), resource_name(origin.ResourceName()), resource_line_offset(origin.ResourceLineOffset()), resource_column_offset(origin.ResourceColumnOffset()), resource_options(origin.Options()), source_map_url(origin.SourceMapUrl()), host_defined_options(origin.HostDefinedOptions()), cached_data(data) {} ScriptCompiler::Source::Source(Local<String> string, CachedData* data)  : source_string(string), cached_data(data) {} ScriptCompiler::Source::~Source() { delete cached_data; } const ScriptCompiler::CachedData* ScriptCompiler::Source::GetCachedData() const { return cached_data; } const ScriptOriginOptions& ScriptCompiler::Source::GetResourceOptions() const { return resource_options; } Local<Boolean> Boolean::New(Isolate* isolate, bool value) { return value ? True(isolate) : False(isolate); } void Template::Set(Isolate* isolate, const char* name, Local<Data> value) { Set(String::NewFromUtf8(isolate, name, NewStringType::kInternalized) .ToLocalChecked(), value); } FunctionTemplate* FunctionTemplate::Cast(Data* data) { #ifdef V8_ENABLE_CHECKS CheckCast(data); #endif return reinterpret_cast<FunctionTemplate*>(data); } ObjectTemplate* ObjectTemplate::Cast(Data* data) { #ifdef V8_ENABLE_CHECKS CheckCast(data); #endif return reinterpret_cast<ObjectTemplate*>(data); } Signature* Signature::Cast(Data* data) { #ifdef V8_ENABLE_CHECKS CheckCast(data); #endif return reinterpret_cast<Signature*>(data); } AccessorSignature* AccessorSignature::Cast(Data* data) { #ifdef V8_ENABLE_CHECKS CheckCast(data); #endif return reinterpret_cast<AccessorSignature*>(data); } Local<Value> Object::GetInternalField(int index) { #ifndef V8_ENABLE_CHECKS typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<A*>(this); // Fast path: If the object is a plain JSObject, which is the common case, we // know where to find the internal fields and can return the value directly. auto instance_type = I::GetInstanceType(obj); if (instance_type == I::kJSObjectType || instance_type == I::kJSApiObjectType || instance_type == I::kJSSpecialApiObjectType) { int offset = I::kJSObjectHeaderSize + (I::kEmbedderDataSlotSize * index); A value = I::ReadRawField<A>(obj, offset); #ifdef V8_COMPRESS_POINTERS // We read the full pointer value and then decompress it in order to avoid // dealing with potential endiannes issues. value = I::DecompressTaggedAnyField(obj, static_cast<uint32_t>(value)); #endif internal::Isolate* isolate = internal::IsolateFromNeverReadOnlySpaceObject(obj); A* result = HandleScope::CreateHandle(isolate, value); return Local<Value>(reinterpret_cast<Value*>(result)); } #endif return SlowGetInternalField(index); } void* Object::GetAlignedPointerFromInternalField(int index) { #ifndef V8_ENABLE_CHECKS typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<A*>(this); // Fast path: If the object is a plain JSObject, which is the common case, we // know where to find the internal fields and can return the value directly. auto instance_type = I::GetInstanceType(obj); if (V8_LIKELY(instance_type == I::kJSObjectType || instance_type == I::kJSApiObjectType || instance_type == I::kJSSpecialApiObjectType)) { int offset = I::kJSObjectHeaderSize + (I::kEmbedderDataSlotSize * index); internal::Isolate* isolate = I::GetIsolateForHeapSandbox(obj); A value = I::ReadExternalPointerField(isolate, obj, offset); return reinterpret_cast<void*>(value); } #endif return SlowGetAlignedPointerFromInternalField(index); } String* String::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<String*>(value); } Local<String> String::Empty(Isolate* isolate) { typedef internal::Address S; typedef internal::Internals I; I::CheckInitialized(isolate); S* slot = I::GetRoot(isolate, I::kEmptyStringRootIndex); return Local<String>(reinterpret_cast<String*>(slot)); } String::ExternalStringResource* String::GetExternalStringResource() const { typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<const A*>(this); ExternalStringResource* result; if (I::IsExternalTwoByteString(I::GetInstanceType(obj))) { internal::Isolate* isolate = I::GetIsolateForHeapSandbox(obj); A value = I::ReadExternalPointerField(isolate, obj, I::kStringResourceOffset); result = reinterpret_cast<String::ExternalStringResource*>(value); } else { result = GetExternalStringResourceSlow(); } #ifdef V8_ENABLE_CHECKS VerifyExternalStringResource(result); #endif return result; } String::ExternalStringResourceBase* String::GetExternalStringResourceBase( String::Encoding* encoding_out) const { typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<const A*>(this); int type = I::GetInstanceType(obj) & I::kFullStringRepresentationMask; *encoding_out = static_cast<Encoding>(type & I::kStringEncodingMask); ExternalStringResourceBase* resource; if (type == I::kExternalOneByteRepresentationTag || type == I::kExternalTwoByteRepresentationTag) { internal::Isolate* isolate = I::GetIsolateForHeapSandbox(obj); A value = I::ReadExternalPointerField(isolate, obj, I::kStringResourceOffset); resource = reinterpret_cast<ExternalStringResourceBase*>(value); } else { resource = GetExternalStringResourceBaseSlow(encoding_out); } #ifdef V8_ENABLE_CHECKS VerifyExternalStringResourceBase(resource, *encoding_out); #endif return resource; } bool Value::IsUndefined() const { #ifdef V8_ENABLE_CHECKS return FullIsUndefined(); #else return QuickIsUndefined(); #endif } bool Value::QuickIsUndefined() const { typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<const A*>(this); if (!I::HasHeapObjectTag(obj)) return false; if (I::GetInstanceType(obj) != I::kOddballType) return false; return (I::GetOddballKind(obj) == I::kUndefinedOddballKind); } bool Value::IsNull() const { #ifdef V8_ENABLE_CHECKS return FullIsNull(); #else return QuickIsNull(); #endif } bool Value::QuickIsNull() const { typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<const A*>(this); if (!I::HasHeapObjectTag(obj)) return false; if (I::GetInstanceType(obj) != I::kOddballType) return false; return (I::GetOddballKind(obj) == I::kNullOddballKind); } bool Value::IsNullOrUndefined() const { #ifdef V8_ENABLE_CHECKS return FullIsNull() || FullIsUndefined(); #else return QuickIsNullOrUndefined(); #endif } bool Value::QuickIsNullOrUndefined() const { typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<const A*>(this); if (!I::HasHeapObjectTag(obj)) return false; if (I::GetInstanceType(obj) != I::kOddballType) return false; int kind = I::GetOddballKind(obj); return kind == I::kNullOddballKind || kind == I::kUndefinedOddballKind; } bool Value::IsString() const { #ifdef V8_ENABLE_CHECKS return FullIsString(); #else return QuickIsString(); #endif } bool Value::QuickIsString() const { typedef internal::Address A; typedef internal::Internals I; A obj = *reinterpret_cast<const A*>(this); if (!I::HasHeapObjectTag(obj)) return false; return (I::GetInstanceType(obj) < I::kFirstNonstringType); } template <class T> Value* Value::Cast(T* value) { return static_cast<Value*>(value); } Boolean* Boolean::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Boolean*>(value); } Name* Name::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Name*>(value); } Symbol* Symbol::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Symbol*>(value); } Private* Private::Cast(Data* data) { #ifdef V8_ENABLE_CHECKS CheckCast(data); #endif return reinterpret_cast<Private*>(data); } Number* Number::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Number*>(value); } Integer* Integer::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Integer*>(value); } Int32* Int32::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Int32*>(value); } Uint32* Uint32::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Uint32*>(value); } BigInt* BigInt::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<BigInt*>(value); } Date* Date::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Date*>(value); } StringObject* StringObject::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<StringObject*>(value); } SymbolObject* SymbolObject::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<SymbolObject*>(value); } NumberObject* NumberObject::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<NumberObject*>(value); } BigIntObject* BigIntObject::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<BigIntObject*>(value); } BooleanObject* BooleanObject::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<BooleanObject*>(value); } RegExp* RegExp::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<RegExp*>(value); } Object* Object::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Object*>(value); } Array* Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Array*>(value); } Map* Map::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Map*>(value); } Set* Set::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Set*>(value); } Promise* Promise::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Promise*>(value); } Proxy* Proxy::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Proxy*>(value); } WasmModuleObject* WasmModuleObject::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<WasmModuleObject*>(value); } Promise::Resolver* Promise::Resolver::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Promise::Resolver*>(value); } ArrayBuffer* ArrayBuffer::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<ArrayBuffer*>(value); } ArrayBufferView* ArrayBufferView::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<ArrayBufferView*>(value); } TypedArray* TypedArray::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<TypedArray*>(value); } Uint8Array* Uint8Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Uint8Array*>(value); } Int8Array* Int8Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Int8Array*>(value); } Uint16Array* Uint16Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Uint16Array*>(value); } Int16Array* Int16Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Int16Array*>(value); } Uint32Array* Uint32Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Uint32Array*>(value); } Int32Array* Int32Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Int32Array*>(value); } Float32Array* Float32Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Float32Array*>(value); } Float64Array* Float64Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Float64Array*>(value); } BigInt64Array* BigInt64Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<BigInt64Array*>(value); } BigUint64Array* BigUint64Array::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<BigUint64Array*>(value); } Uint8ClampedArray* Uint8ClampedArray::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Uint8ClampedArray*>(value); } DataView* DataView::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<DataView*>(value); } SharedArrayBuffer* SharedArrayBuffer::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<SharedArrayBuffer*>(value); } Function* Function::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Function*>(value); } External* External::Cast(v8::Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<External*>(value); } template<typename T> Isolate* PropertyCallbackInfo<T>::GetIsolate() const { return *reinterpret_cast<Isolate**>(&args_[kIsolateIndex]); } template<typename T> Local<Value> PropertyCallbackInfo<T>::Data() const { return Local<Value>(reinterpret_cast<Value*>(&args_[kDataIndex])); } template<typename T> Local<Object> PropertyCallbackInfo<T>::This() const { return Local<Object>(reinterpret_cast<Object*>(&args_[kThisIndex])); } template<typename T> Local<Object> PropertyCallbackInfo<T>::Holder() const { return Local<Object>(reinterpret_cast<Object*>(&args_[kHolderIndex])); } template<typename T> ReturnValue<T> PropertyCallbackInfo<T>::GetReturnValue() const { return ReturnValue<T>(&args_[kReturnValueIndex]); } template <typename T> bool PropertyCallbackInfo<T>::ShouldThrowOnError() const { typedef internal::Internals I; if (args_[kShouldThrowOnErrorIndex] != I::IntToSmi(I::kInferShouldThrowMode)) { return args_[kShouldThrowOnErrorIndex] != I::IntToSmi(I::kDontThrow); } return v8::internal::ShouldThrowOnError( reinterpret_cast<v8::internal::Isolate*>(GetIsolate())); } Local<Primitive> Undefined(Isolate* isolate) { typedef internal::Address S; typedef internal::Internals I; I::CheckInitialized(isolate); S* slot = I::GetRoot(isolate, I::kUndefinedValueRootIndex); return Local<Primitive>(reinterpret_cast<Primitive*>(slot)); } Local<Primitive> Null(Isolate* isolate) { typedef internal::Address S; typedef internal::Internals I; I::CheckInitialized(isolate); S* slot = I::GetRoot(isolate, I::kNullValueRootIndex); return Local<Primitive>(reinterpret_cast<Primitive*>(slot)); } Local<Boolean> True(Isolate* isolate) { typedef internal::Address S; typedef internal::Internals I; I::CheckInitialized(isolate); S* slot = I::GetRoot(isolate, I::kTrueValueRootIndex); return Local<Boolean>(reinterpret_cast<Boolean*>(slot)); } Local<Boolean> False(Isolate* isolate) { typedef internal::Address S; typedef internal::Internals I; I::CheckInitialized(isolate); S* slot = I::GetRoot(isolate, I::kFalseValueRootIndex); return Local<Boolean>(reinterpret_cast<Boolean*>(slot)); } void Isolate::SetData(uint32_t slot, void* data) { typedef internal::Internals I; I::SetEmbedderData(this, slot, data); } void* Isolate::GetData(uint32_t slot) { typedef internal::Internals I; return I::GetEmbedderData(this, slot); } uint32_t Isolate::GetNumberOfDataSlots() { typedef internal::Internals I; return I::kNumIsolateDataSlots; } template <class T> MaybeLocal<T> Isolate::GetDataFromSnapshotOnce(size_t index) { T* data = reinterpret_cast<T*>(GetDataFromSnapshotOnce(index)); if (data) internal::PerformCastCheck(data); return Local<T>(data); } int64_t Isolate::AdjustAmountOfExternalAllocatedMemory( int64_t change_in_bytes) { typedef internal::Internals I; int64_t* external_memory = reinterpret_cast<int64_t*>( reinterpret_cast<uint8_t*>(this) + I::kExternalMemoryOffset); int64_t* external_memory_limit = reinterpret_cast<int64_t*>( reinterpret_cast<uint8_t*>(this) + I::kExternalMemoryLimitOffset); int64_t* external_memory_low_since_mc = reinterpret_cast<int64_t*>(reinterpret_cast<uint8_t*>(this) + I::kExternalMemoryLowSinceMarkCompactOffset); // Embedders are weird: we see both over- and underflows here. Perform the // addition with unsigned types to avoid undefined behavior. const int64_t amount = static_cast<int64_t>(static_cast<uint64_t>(change_in_bytes) + static_cast<uint64_t>(*external_memory)); *external_memory = amount; if (amount < *external_memory_low_since_mc) { *external_memory_low_since_mc = amount; *external_memory_limit = amount + I::kExternalAllocationSoftLimit; } if (change_in_bytes <= 0) return *external_memory; if (amount > *external_memory_limit) { ReportExternalAllocationLimitReached(); } return *external_memory; } Local<Value> Context::GetEmbedderData(int index) { #ifndef V8_ENABLE_CHECKS typedef internal::Address A; typedef internal::Internals I; A ctx = *reinterpret_cast<const A*>(this); A embedder_data = I::ReadTaggedPointerField(ctx, I::kNativeContextEmbedderDataOffset); int value_offset = I::kEmbedderDataArrayHeaderSize + (I::kEmbedderDataSlotSize * index); A value = I::ReadRawField<A>(embedder_data, value_offset); #ifdef V8_COMPRESS_POINTERS // We read the full pointer value and then decompress it in order to avoid // dealing with potential endiannes issues. value = I::DecompressTaggedAnyField(embedder_data, static_cast<uint32_t>(value)); #endif internal::Isolate* isolate = internal::IsolateFromNeverReadOnlySpaceObject( *reinterpret_cast<A*>(this)); A* result = HandleScope::CreateHandle(isolate, value); return Local<Value>(reinterpret_cast<Value*>(result)); #else return SlowGetEmbedderData(index); #endif } void* Context::GetAlignedPointerFromEmbedderData(int index) { #ifndef V8_ENABLE_CHECKS typedef internal::Address A; typedef internal::Internals I; A ctx = *reinterpret_cast<const A*>(this); A embedder_data = I::ReadTaggedPointerField(ctx, I::kNativeContextEmbedderDataOffset); int value_offset = I::kEmbedderDataArrayHeaderSize + (I::kEmbedderDataSlotSize * index); internal::Isolate* isolate = I::GetIsolateForHeapSandbox(ctx); return reinterpret_cast<void*>( I::ReadExternalPointerField(isolate, embedder_data, value_offset)); #else return SlowGetAlignedPointerFromEmbedderData(index); #endif } template <class T> MaybeLocal<T> Context::GetDataFromSnapshotOnce(size_t index) { T* data = reinterpret_cast<T*>(GetDataFromSnapshotOnce(index)); if (data) internal::PerformCastCheck(data); return Local<T>(data); } template <class T> size_t SnapshotCreator::AddData(Local<Context> context, Local<T> object) { T* object_ptr = *object; internal::Address* p = reinterpret_cast<internal::Address*>(object_ptr); return AddData(context, *p); } template <class T> size_t SnapshotCreator::AddData(Local<T> object) { T* object_ptr = *object; internal::Address* p = reinterpret_cast<internal::Address*>(object_ptr); return AddData(*p); } /** * \example shell.cc * A simple shell that takes a list of expressions on the * command-line and executes them. */ /** * \example process.cc */ } // namespace v8 #endif // INCLUDE_V8_H_

JavaScript Deno 1.0

A proposta do Deno é prover uma ferramenta standalone que permita a criação de uma solução rápida para funcionalidades complexas. Sua abordagem é, e sempre será, de ser um único arquivo executável. O código abaixo é um exemplo de tal simplicidade, sendo capaz de disponibilizar em pouquíssimas linhas um servidor HTTP funcional .

"Deno is a new runtime for executing JavaScript and TypeScript outside of the web browser." Solyoh32 (talk) 02:04, 15 May 2020 (UTC)

O que voce achou do novo JavaScript Deno 1.0 ???

Descreva sua experiencia !!!! Solyoh32 (talk) 02:25, 15 May 2020 (UTC)

Solyoh32, you are invited to the Teahouse!

Hi Solyoh32! Thanks for contributing to Wikipedia. Be our guest at the Teahouse! The Teahouse is a friendly space where new editors can ask questions about contributing to Wikipedia and get help from experienced editors like MrClog (talk). Visit the Teahouse We hope to see you there! Delivered by HostBot on behalf of the Teahouse hosts 16:12, 15 May 2020 (UTC)