1 2010-02-23: Version 2.1.2 2 3 Fix a crash bug caused by wrong assert. 4 5 Fix a bug with register names on 64-bit V8 (issue 615). 6 7 Performance improvements on all platforms. 8 9 2010-02-19: Version 2.1.1 10 11 [ES5] Implemented Object.defineProperty. 12 13 Improved profiler support. 14 15 Added SetPrototype method in the public V8 API. 16 17 Added GetScriptOrigin and GetScriptLineNumber methods to Function 18 objects in the API. 19 20 Performance improvements on all platforms. 21 22 23 2010-02-03: Version 2.1.0 24 25 Values are now always wrapped in objects when used as a receiver. 26 (issue 223). 27 28 [ES5] Implemented Object.getOwnPropertyNames. 29 30 [ES5] Restrict JSON.parse to only accept strings that conforms to the 31 JSON grammar. 32 33 Improvement of debugger agent (issue 549 and 554). 34 35 Fixed problem with skipped stack frame in profiles (issue 553). 36 37 Solaris support by Erich Ocean <erich.ocean (a] me.com> and Ryan Dahl 38 <ry (a] tinyclouds.org>. 39 40 Fix a bug that Math.round() returns incorrect results for huge 41 integers. 42 43 Fix enumeration order for objects created from some constructor 44 functions (isue http://crbug.com/3867). 45 46 Fix arithmetic on some integer constants (issue 580). 47 48 Numerous performance improvements including porting of previous IA-32 49 optimizations to x64 and ARM architectures. 50 51 52 2010-01-14: Version 2.0.6 53 54 Added ES5 Object.getPrototypeOf, GetOwnPropertyDescriptor, 55 GetOwnProperty, FromPropertyDescriptor. 56 57 Fixed Mac x64 build errors. 58 59 Improved performance of some math and string operations. 60 61 Improved performance of some regexp operations. 62 63 Improved performance of context creation. 64 65 Improved performance of hash tables. 66 67 68 2009-12-18: Version 2.0.5 69 70 Extended to upper limit of map space to allow for 7 times as many map 71 to be allocated (issue 524). 72 73 Improved performance of code using closures. 74 75 Improved performance of some binary operations involving doubles. 76 77 78 2009-12-16: Version 2.0.4 79 80 Added ECMAScript 5 Object.create. 81 82 Improved performance of Math.max and Math.min. 83 84 Optimized adding of strings on 64-bit platforms. 85 86 Improved handling of external strings by using a separate table 87 instead of weak handles. This improves garbage collection 88 performance and uses less memory. 89 90 Changed code generation for object and array literals in toplevel 91 code to be more compact by doing more work in the runtime. 92 93 Fixed a crash bug triggered when garbage collection happened during 94 generation of a callback load inline cache stub. 95 96 Fixed crash bug sometimes triggered when local variables shadowed 97 parameters in functions that used the arguments object. 98 99 100 2009-12-03: Version 2.0.3 101 102 Optimized handling and adding of strings, for-in and Array.join. 103 104 Heap serialization is now non-destructive. 105 106 Improved profiler support with information on time spend in C++ 107 callbacks registered through the API. 108 109 Added commands to the debugger protocol for starting/stopping 110 profiling. 111 112 Enabled the non-optimizing compiler for top-level code. 113 114 Changed the API to only allow strings to be set as data objects on 115 Contexts and scripts to avoid potentially keeping global objects 116 around for too long (issue 528). 117 118 OpenBSD support patch by Peter Valchev <pvalchev (a] gmail.com>. 119 120 Fixed bugs. 121 122 123 2009-11-24: Version 2.0.2 124 125 Improved profiler support. 126 127 Fixed bug that broke compilation of d8 with readline support. 128 129 130 2009-11-20: Version 2.0.1 131 132 Fixed crash bug in String.prototype.replace. 133 134 Reverted a change which caused Chromium interactive ui test 135 failures. 136 137 138 2009-11-18: Version 2.0.0 139 140 Added support for VFP on ARM. 141 142 Added TryCatch::ReThrow method to the API. 143 144 Reduced the size of snapshots and improved the snapshot load time. 145 146 Improved heap profiler support. 147 148 64-bit version now supported on Windows. 149 150 Fixed a number of debugger issues. 151 152 Fixed bugs. 153 154 155 2009-10-29: Version 1.3.18 156 157 Reverted a change which caused crashes in RegExp replace. 158 159 Reverted a change which caused Chromium ui_tests failure. 160 161 162 2009-10-28: Version 1.3.17 163 164 Added API method to get simple heap statistics. 165 166 Improved heap profiler support. 167 168 Fixed the implementation of the resource constraint API so it 169 works when using snapshots. 170 171 Fixed a number of issues in the Windows 64-bit version. 172 173 Optimized calls to API getters. 174 175 Added valgrind notification on code modification to the 64-bit version. 176 177 Fixed issue where we logged shared library addresses on Windows at 178 startup and never used them. 179 180 181 2009-10-16: Version 1.3.16 182 183 X64: Convert smis to holding 32 bits of payload. 184 185 Introduce v8::Integer::NewFromUnsigned method. 186 187 Add missing null check in Context::GetCurrent. 188 189 Add trim, trimLeft and trimRight methods to String 190 Patch by Jan de Mooij <jandemooij (a] gmail.com> 191 192 Implement ES5 Array.isArray 193 Patch by Jan de Mooij <jandemooij (a] gmail.com> 194 195 Skip access checks for hidden properties. 196 197 Add String::Concat(Handle<String> left, Handle<String> right) to the V8 API. 198 199 Fix GYP-based builds of V8. 200 201 202 2009-10-07: Version 1.3.15 203 204 Expand the maximum size of the code space to 512MB for 64-bit mode. 205 206 Fixed a crash bug happening when starting profiling (issue 207 http://crbug.com/23768). 208 209 210 2009-10-07: Version 1.3.14 211 212 Added GetRealNamedProperty to the API to lookup real properties 213 located on the object or in the prototype chain skipping any 214 interceptors. 215 216 Fix the stack limits setting API to work correctly with threads. The 217 stack limit now needs to be set to each thread thich is used with V8. 218 219 Remove the high-priority flag from IdleNotification() 220 221 Ensure V8 is initialized before locking and unlocking threads. 222 223 Implemented a new JavaScript minifier for compressing the source of 224 the built-in JavaScript. This removes non-Open Source code from Douglas 225 Crockford from the project. 226 227 Added a missing optimization in StringCharAt. 228 229 Fixed some flaky socket tests. 230 231 Change by Alexander Botero-Lowry to fix profiler sampling on FreeBSD 232 in 64-bit mode. 233 234 Fixed memory leaks in the thread management code. 235 236 Fixed the result of assignment to a pixel array. The assigned value 237 is now the result. 238 239 Error reporting for invalid left-hand sides in for-in statements, pre- 240 and postfix count expressions, and assignments now matches the JSC 241 behavior in Safari 4. 242 243 Follow the spec in disallowing function declarations without a name. 244 245 Always allocate code objects within a 2 GB range. On x64 architecture 246 this is used to use near calls (32-bit displacement) in Code objects. 247 248 Optimized array construction ported to x64 and ARM architectures. 249 250 [ES5] Changed Object.keys to return strings for element indices. 251 252 253 2009-09-23: Version 1.3.13 254 255 Fixed uninitialized memory problem. 256 257 Improved heap profiler support. 258 259 260 2009-09-22: Version 1.3.12 261 262 Changed behavior of |function|.toString() on built-in functions to 263 be compatible with other implementations. Patch by Jan de Mooij. 264 265 Added Object::IsDirty in the API. 266 267 Optimized array construction; it is now handled purely in native 268 code. 269 270 [ES5] Made properties of the arguments array enumerable. 271 272 [ES5] Added test suite adapter for the es5conform test suite. 273 274 [ES5] Added Object.keys function. 275 276 277 2009-09-15: Version 1.3.11 278 279 Fixed crash in error reporting during bootstrapping. 280 281 Optimized generated IA32 math code by using SSE2 instructions when 282 available. 283 284 Implemented missing pieces of debugger infrastructure on ARM. The 285 debugger is now fully functional on ARM. 286 287 Make 'hidden' the default visibility for gcc. 288 289 290 2009-09-09: Version 1.3.10 291 292 Fixed profiler on Mac in 64-bit mode. 293 294 Optimized creation of objects from simple constructor functions on 295 ARM. 296 297 Fixed a number of debugger issues. 298 299 Reduced the amount of memory consumed by V8. 300 301 302 2009-09-02: Version 1.3.9 303 304 Optimized stack guard checks on ARM. 305 306 Optimized API operations by inlining more in the API. 307 308 Optimized creation of objects from simple constructor functions. 309 310 Enabled a number of missing optimizations in the 64-bit port. 311 312 Implemented native-code support for regular expressions on ARM. 313 314 Stopped using the 'sahf' instruction on 64-bit machines that do 315 not support it. 316 317 Fixed a bug in the support for forceful termination of JavaScript 318 execution. 319 320 321 2009-08-26: Version 1.3.8 322 323 Changed the handling of idle notifications to allow idle 324 notifications when V8 has not yet been initialized. 325 326 Fixed ARM simulator compilation problem on Windows. 327 328 329 2009-08-25: Version 1.3.7 330 331 Reduced the size of generated code on ARM platforms by reducing 332 the size of constant pools. 333 334 Changed build files to not include the 'ENV' user environment 335 variable in the build environment. 336 337 Changed the handling of idle notifications. 338 339 340 2009-08-21: Version 1.3.6 341 342 Add support for forceful termination of JavaScript execution. 343 344 Add low memory notification to the API. The embedding host can signal 345 a low memory situation to V8. 346 347 Changed the handling of global handles (persistent handles in the API 348 sense) to avoid issues regarding allocation of new global handles 349 during weak handle callbacks. 350 351 Changed the growth policy of the young space. 352 353 Fixed a GC issue introduced in version 1.3.5. 354 355 356 2009-08-19: Version 1.3.5 357 358 Optimize initialization of some arrays in the builtins. 359 360 Fix mac-nm script to support filenames with spaces. 361 362 Support for using the V8 profiler when V8 is embedded in a Windows DLL. 363 364 Changed typeof RegExp from 'object' to 'function' for compatibility. 365 Fixed bug where regexps were not callable across contexts. 366 367 Added context independent script compilation to the API. 368 369 Added API call to get the stack trace for an exception. 370 371 Added API for getting object mirrors. 372 373 Make sure that SSE3 instructions are used whenever possible even when 374 running off a snapshot generated without using SSE3 instructions. 375 376 Tweaked the handling of the initial size and growth policy of the heap. 377 378 Added native code generation for RegExp to 64-bit version. 379 380 Added JavaScript debugger support to 64-bit version. 381 382 383 2009-08-13: Version 1.3.4 384 385 Added a readline() command to the d8 shell. 386 387 Fixed bug in json parsing. 388 389 Added idle notification to the API and reduced memory on idle 390 notifications. 391 392 393 2009-08-12: Version 1.3.3 394 395 Fix issue 417: incorrect %t placeholder expansion. 396 397 Add .gitignore file similar to Chromium's one. 398 399 Fix SConstruct file to build with new logging code for Android. 400 401 API: added function to find instance of template in prototype 402 chain. Inlined Object::IsInstanceOf. 403 404 Land change to notify valgrind when we modify code on x86. 405 406 Add api call to determine whether a string can be externalized. 407 408 Add a write() command to d8. 409 410 411 2009-08-05: Version 1.3.2 412 413 Started new compiler infrastructure for two-pass compilation using a 414 control flow graph constructed from the AST. 415 416 Profiler stack sampling for X64. 417 418 Safe handling of NaN to Posix platform-dependent time functions. 419 420 Added a new profiler control API to unify controlling various aspects 421 of profiling. 422 423 Fixed issue 392. 424 425 426 2009-07-30: Version 1.3.1 427 428 Speed improvements to accessors and interceptors. 429 430 Added support for capturing stack information on custom errors. 431 432 Added support for morphing an object into a pixel array where its 433 indexed properties are stored in an external byte array. Values written 434 are always clamped to the 0..255 interval. 435 436 Profiler on x64 now handles C/C++ functions from shared libraries. 437 438 Changed the debugger to avoid stepping into function.call/apply if the 439 function is a built-in. 440 441 Initial implementation of constructor heap profile for JS objects. 442 443 More fine grained control of profiling aspects through the API. 444 445 Optimized the called as constructor check for API calls. 446 447 448 2009-07-27: Version 1.3.0 449 450 Allowed RegExp objects to be called as functions (issue 132). 451 452 Fixed issue where global property cells would escape after 453 detaching the global object; see http://crbug.com/16276. 454 455 Added support for stepping into setters and getters in the 456 debugger. 457 458 Changed the debugger to avoid stopping in its own JavaScript code 459 and in the code of built-in functions. 460 461 Fixed issue 345 by avoiding duplicate escaping labels. 462 463 Fixed ARM code generator crash in short-circuited boolean 464 expressions and added regression tests. 465 466 Added an external allocation limit to avoid issues where small V8 467 objects would hold on to large amounts of external memory without 468 causing garbage collections. 469 470 Finished more of the inline caching stubs for x64 targets. 471 472 473 2009-07-13: Version 1.2.14 474 475 Added separate paged heap space for global property cells and 476 avoid updating the write barrier when storing into them. 477 478 Improved peep-hole optimization on ARM platforms by not emitting 479 unnecessary debug information. 480 481 Re-enabled ICs for loads and calls that skip a global object 482 during lookup through the prototype chain. 483 484 Allowed access through global proxies to use ICs. 485 486 Fixed issue 401. 487 488 489 2009-07-09: Version 1.2.13 490 491 Fixed issue 397, issue 398, and issue 399. 492 493 Added support for breakpoint groups. 494 495 Fixed bugs introduced with the new global object representation. 496 497 Fixed a few bugs in the ARM code generator. 498 499 500 2009-07-06: Version 1.2.12 501 502 Added stack traces collection to Error objects accessible through 503 the e.stack property. 504 505 Changed RegExp parser to use a recursive data structure instead of 506 stack-based recursion. 507 508 Optimized Date object construction and string concatenation. 509 510 Improved performance of div, mod, and mul on ARM platforms. 511 512 513 2009-07-02: Version 1.2.11 514 515 Improved performance on IA-32 and ARM. 516 517 Fixed profiler sampler implementation on Mac OS X. 518 519 Changed the representation of global objects to improve 520 performance of adding a lot of new properties. 521 522 523 2009-06-29: Version 1.2.10 524 525 Improved debugger support. 526 527 Fixed bug in exception message reporting (issue 390). 528 529 Improved overall performance. 530 531 532 2009-06-23: Version 1.2.9 533 534 Improved math performance on ARM. 535 536 Fixed profiler name-inference bug. 537 538 Fixed handling of shared libraries in the profiler tick processor 539 scripts. 540 541 Fixed handling of tests that time out in the test scripts. 542 543 Fixed compilation on MacOS X version 10.4. 544 545 Fixed two bugs in the regular expression engine. 546 547 Fixed a bug in the string type inference. 548 549 Fixed a bug in the handling of 'constant function' properties. 550 551 Improved overall performance. 552 553 554 2009-06-16: Version 1.2.8 555 556 Optimized math on ARM platforms. 557 558 Fixed two crash bugs in the handling of getters and setters. 559 560 Improved the debugger support by adding scope chain information. 561 562 Improved the profiler support by compressing log data transmitted 563 to clients. 564 565 Improved overall performance. 566 567 568 2009-06-08: Version 1.2.7 569 570 Improved debugger and profiler support. 571 572 Reduced compilation time by improving the handling of deferred 573 code. 574 575 Optimized interceptor accesses where the property is on the object 576 on which the interceptors is attached. 577 578 Fixed compilation problem on GCC 4.4 by changing the stack 579 alignment to 16 bytes. 580 581 Fixed handle creation to follow stric aliasing rules. 582 583 Fixed compilation on FreeBSD. 584 585 Introduced API for forcing the deletion of a property ignoring 586 interceptors and attributes. 587 588 589 2009-05-29: Version 1.2.6 590 591 Added a histogram recording hit rates at different levels of the 592 compilation cache. 593 594 Added stack overflow check for the RegExp analysis phase. Previously a 595 very long regexp graph could overflow the stack with recursive calls. 596 597 Use a dynamic buffer when collecting log events in memory. 598 599 Added start/stop events to the profiler log. 600 601 Fixed infinite loop which could happen when setting a debug break while 602 executing a RegExp compiled to native code. 603 604 Fixed handling of lastIndexOf called with negative index (issue 351). 605 606 Fixed irregular crash in profiler test (issue 358). 607 608 Fixed compilation issues with some versions of gcc. 609 610 611 2009-05-26: Version 1.2.5 612 613 Fixed bug in initial boundary check for Boyer-Moore text 614 search (issue 349). 615 616 Fixed compilation issues with MinGW and gcc 4.3+ and added support 617 for armv7 and cortex-a8 architectures. Patches by Lei Zhang and 618 Craig Schlenter. 619 620 Added a script cache to the debugger. 621 622 Optimized compilation performance by improving internal data 623 structures and avoiding expensive property load optimizations for 624 code that's infrequently executed. 625 626 Exposed the calling JavaScript context through the static API 627 function Context::GetCalling(). 628 629 630 2009-05-18: Version 1.2.4 631 632 Improved performance of floating point number allocation for ARM 633 platforms. 634 635 Fixed crash when using the instanceof operator on functions with 636 number values in their prototype chain (issue 341). 637 638 Optimized virtual frame operations in the code generator to speed 639 up compilation time and allocated the frames in the zone. 640 641 Made the representation of virtual frames and jump targets in the 642 code generator much more compact. 643 644 Avoided linear search for non-locals in scope code when resolving 645 variables inside with and eval scopes. 646 647 Optimized lexical scanner by dealing with whitespace as part of 648 the token scanning instead of as a separate step before it. 649 650 Changed the scavenging collector so that promoted objects do not 651 reside in the old generation while their remembered set is being 652 swept for pointers into the young generation. 653 654 Fixed numeric overflow handling when compiling count operations. 655 656 657 2009-05-11: Version 1.2.3 658 659 Fixed bug in reporting of out-of-memory situations. 660 661 Introduced hidden prototypes on certain builtin prototype objects 662 such as String.prototype to emulate JSC's behavior of restoring 663 the original function when deleting functions from those prototype 664 objects. 665 666 Fixed crash bug in the register allocator. 667 668 669 2009-05-04: Version 1.2.2 670 671 Fixed bug in array sorting for sparse arrays (issue 326). 672 673 Added support for adding a soname when building a shared library 674 on Linux (issue 151). 675 676 Fixed bug caused by morphing internal ASCII strings to external 677 two-byte strings. Slices over ASCII strings have to forward ASCII 678 checks to the underlying buffer string. 679 680 Allowed API call-as-function handlers to be called as 681 constructors. 682 683 Fixed a crash bug where an external string was disposed but a 684 slice of the external string survived as a symbol. 685 686 687 2009-04-27: Version 1.2.1 688 689 Added EcmaScript 5 JSON object. 690 691 Fix bug in preemption support on ARM. 692 693 694 2009-04-23: Version 1.2.0 695 696 Optimized floating-point operations on ARM. 697 698 Added a number of extensions to the debugger API. 699 700 Changed the enumeration order for unsigned integer keys to always 701 be numerical order. 702 703 Added a "read" extension to the shell sample. 704 705 Added support for Array.prototype.reduce and 706 Array.prototype.reduceRight. 707 708 Added an option to the SCons build to control Microsoft Visual C++ 709 link-time code generation. 710 711 Fixed a number of bugs (in particular issue 315, issue 316, 712 issue 317 and issue 318). 713 714 715 2009-04-15: Version 1.1.10 716 717 Fixed crash bug that occurred when loading a const variable in the 718 presence of eval. 719 720 Allowed using with and eval in registered extensions in debug mode 721 by fixing bogus assert. 722 723 Fixed the source position for function returns to enable the 724 debugger to break there. 725 726 727 2009-04-14: Version 1.1.9 728 729 Made the stack traversal code in the profiler robust by avoiding 730 to look into the heap. 731 732 Added name inferencing for anonymous functions to facilitate 733 debugging and profiling. 734 735 Re-enabled stats timers in the developer shell (d8). 736 737 Fixed issue 303 by avoiding to shortcut cons-symbols. 738 739 740 2009-04-11: Version 1.1.8 741 742 Changed test-debug/ThreadedDebugging to be non-flaky (issue 96). 743 744 Fixed step-in handling for Function.prototype.apply and call in 745 the debugger (issue 269). 746 747 Fixed v8::Object::DeleteHiddenValue to not bail out when there 748 are no hidden properties. 749 750 Added workaround for crash bug, where external symbol table 751 entries with deleted resources would lead to NPEs when looking 752 up in the symbol table. 753 754 755 2009-04-07: Version 1.1.7 756 757 Added support for easily importing additional environment 758 variables into the SCons build. 759 760 Optimized strict equality checks. 761 762 Fixed crash in indexed setters on objects without a corresponding 763 getter (issue 298). 764 765 Re-enabled script compilation cache. 766 767 768 2009-04-01: Version 1.1.6 769 770 Reverted an unsafe code generator change. 771 772 773 2009-04-01: Version 1.1.5 774 775 Fixed bug that caused function literals to not be optimized as 776 much as other functions. 777 778 Improved profiler support. 779 780 Fixed a crash bug in connection with debugger unloading. 781 782 Fixed a crash bug in the code generator caused by losing the 783 information that a frame element was copied. 784 785 Fixed an exception propagation bug that could cause non-null 786 return values when exceptions were thrown. 787 788 789 2009-03-30: Version 1.1.4 790 791 Optimized String.prototype.match. 792 793 Improved the stack information in profiles. 794 795 Fixed bug in ARM port making it possible to compile the runtime 796 system for thumb mode again. 797 798 Implemented a number of optimizations in the code generator. 799 800 Fixed a number of memory leaks in tests. 801 802 Fixed crash bug in connection with script source code and external 803 strings. 804 805 806 2009-03-24: Version 1.1.3 807 808 Fixed assertion failures in compilation of loop conditions. 809 810 Removed STL dependency from developer shell (d8). 811 812 Added infrastructure for protecting the V8 heap from corruption 813 caused by memory modifications from the outside. 814 815 816 2009-03-24: Version 1.1.2 817 818 Improved frame merge code generated by the code generator. 819 820 Optimized String.prototype.replace. 821 822 Implemented __defineGetter__ and __defineSetter__ for properties 823 with integer keys on non-array objects. 824 825 Improved debugger and profiler support. 826 827 Fixed a number of portability issues to allow compilation for 828 smaller ARM devices. 829 830 Exposed object cloning through the API. 831 832 Implemented hidden properties. This is used to expose an identity 833 hash for objects through the API. 834 835 Implemented restarting of regular expressions if their input 836 string changes representation during preemption. 837 838 Fixed a code generator bug that could cause assignments in loops 839 to be ignored if using continue to break out of the loop (issue 840 284). 841 842 843 2009-03-12: Version 1.1.1 844 845 Fixed an assertion in the new compiler to take stack overflow 846 exceptions into account. 847 848 Removed exception propagation code that could cause crashes. 849 850 Fixed minor bug in debugger line number computations. 851 852 8-byte align the C stack on Linux and Windows to speed up floating 853 point computations. 854 855 856 2009-03-12: Version 1.1.0 857 858 Improved code generation infrastructure by doing simple register 859 allocation and constant folding and propagation. 860 861 Optimized regular expression matching by avoiding to create 862 intermediate string arrays and by flattening nested array 863 representations of RegExp data. 864 865 Traverse a few stack frames when recording profiler samples to 866 include partial call graphs in the profiling output. 867 868 Added support for using OProfile to profile generated code. 869 870 Added remote debugging support to the D8 developer shell. 871 872 Optimized creation of nested literals like JSON objects. 873 874 Fixed a bug in garbage collecting unused maps and turned it on by 875 default (--collect-maps). 876 877 Added support for running tests under Valgrind. 878 879 880 2009-02-27: Version 1.0.3 881 882 Optimized double-to-integer conversions in bit operations by using 883 SSE3 instructions if available. 884 885 Optimized initialization sequences that store to multiple 886 properties of the same object. 887 888 Changed the D8 debugger frontend to use JSON messages. 889 890 Force garbage collections when disposing contexts. 891 892 Align code objects at 32-byte boundaries. 893 894 895 2009-02-25: Version 1.0.2 896 897 Improved profiling support by performing simple call stack 898 sampling for ticks and by fixing a bug in the logging of code 899 addresses. 900 901 Fixed a number of debugger issues. 902 903 Optimized code that uses eval. 904 905 Fixed a couple of bugs in the regular expression engine. 906 907 Reduced the size of generated code for certain regular expressions. 908 909 Removed JSCRE completely. 910 911 Fixed issue where test could not be run if there was a dot in the 912 checkout path. 913 914 915 2009-02-13: Version 1.0.1 916 917 Fixed two crash-bugs in irregexp (issue 231 and 233). 918 919 Fixed a number of minor bugs (issue 87, 227 and 228). 920 921 Added support for morphing strings to external strings on demand 922 to avoid having to create copies in the embedding code. 923 924 Removed experimental support for external symbol callbacks. 925 926 927 2009-02-09: Version 1.0.0 928 929 Fixed crash-bug in the code generation for case independent 16 bit 930 backreferences. 931 932 Made shells more robust in the presence of string conversion 933 failures (issue 224). 934 935 Fixed a potential infinite loop when attempting to resolve 936 eval (issue 221). 937 938 Miscellaneous fixes to the new regular expression engine. 939 940 Reduced binary by stripping unneeded text from JavaScript library and 941 minifying some JavaScript files. 942 943 944 2009-01-27: Version 0.4.9 945 946 Enabled new regular expression engine. 947 948 Made a number of changes to the debugger protocol. 949 950 Fixed a number of bugs in the preemption support. 951 952 Added -p option to the developer shell to run files in parallel 953 using preemption. 954 955 Fixed a number of minor bugs (including issues 176, 187, 189, 192, 956 193, 198 and 201). 957 958 Fixed a number of bugs in the serialization/deserialization 959 support for the ARM platform. 960 961 962 2009-01-19: Version 0.4.8.1 963 964 Minor patch to debugger support. 965 966 967 2009-01-16: Version 0.4.8 968 969 Fixed string length bug on ARM (issue 171). 970 971 Made most methods in the API const. 972 973 Optimized object literals by improving data locality. 974 975 Fixed bug that caused incomplete functions to be cached in case of 976 stack overflow exceptions. 977 978 Fixed bugs that caused catch variables and variables introduced by 979 eval to behave incorrectly when using accessors (issues 186, 190 980 and 191). 981 982 983 2009-01-06: Version 0.4.7 984 985 Minor bugfixes and optimizations. 986 987 Added command line debugger to D8 shell. 988 989 Fixed subtle bug that caused the wrong 'this' to be used when 990 calling a caught function in a catch clause. 991 992 Inline array loads within loops directly in the code instead of 993 always calling a stub. 994 995 996 2008-12-11: Version 0.4.6 997 998 Fixed exception reporting bug where certain exceptions were 999 incorrectly reported as uncaught. 1000 1001 Improved the memory allocation strategy used during compilation to 1002 make running out of memory when compiling huge scripts less 1003 likely. 1004 1005 Optimized String.replace by avoiding the construction of certain 1006 sub strings. 1007 1008 Fixed bug in code generation for large switch statements on ARM. 1009 1010 Fixed bug that caused V8 to change the global object template 1011 passed in by the user. 1012 1013 Changed the API for creating object groups used during garbage 1014 collection. Entire object groups are now passed to V8 instead of 1015 individual members of the groups. 1016 1017 1018 2008-12-03: Version 0.4.5 1019 1020 Added experimental API support for allocating V8 symbols as 1021 external strings. 1022 1023 Fixed bugs in debugging support on ARM. 1024 1025 Changed eval implementation to correctly detect whether or not a 1026 call to eval is aliased. 1027 1028 Fixed bug caused by a combination of the compilation cache and 1029 dictionary probing in native code. The bug caused us to sometimes 1030 call functions that had not yet been compiled. 1031 1032 Added platform support for FreeBSD. 1033 1034 Added support for building V8 on Windows with either the shared or 1035 static version of MSVCRT 1036 1037 Added the v8::jscre namespace around the jscre functions to avoid 1038 link errors (duplicate symbols) when building Google Chrome. 1039 1040 Added support for calling a JavaScript function with the current 1041 debugger execution context as its argument to the debugger 1042 interface. 1043 1044 Changed the type of names of counters from wchar_t to char. 1045 1046 Changed the Windows system call used to compute daylight savings 1047 time. The system call that we used to use became four times 1048 slower on WinXP SP3. 1049 1050 Added support in the d8 developer shell for memory-mapped counters 1051 and added a stats-viewer tool. 1052 1053 Fixed bug in upper/lower case mappings (issue 149). 1054 1055 1056 2008-11-17: Version 0.4.4 1057 1058 Reduced code size by using shorter instruction encoding when 1059 possible. 1060 1061 Added a --help option to the shell sample and to the d8 shell. 1062 1063 Added visual studio project files for building the ARM simulator. 1064 1065 Fixed a number of ARM simulator issues. 1066 1067 Fixed bug in out-of-memory handling on ARM. 1068 1069 Implemented shell support for passing arguments to a script from 1070 the command line. 1071 1072 Fixed bug in date code that made certain date functions return -0 1073 instead of 0 for dates before the epoch. 1074 1075 Restricted applications of eval so it can only be used in the 1076 context of the associated global object. 1077 1078 Treat byte-order marks as whitespace characters. 1079 1080 1081 2008-11-04: Version 0.4.3 1082 1083 Added support for API accessors that prohibit overwriting by 1084 accessors defined in JavaScript code by using __defineGetter__ and 1085 __defineSetter__. 1086 1087 Improved handling of conditionals in test status files. 1088 1089 Introduced access control in propertyIsEnumerable. 1090 1091 Improved performance of some string operations by caching 1092 information about the type of the string between operations. 1093 1094 Fixed bug in fast-case code for switch statements that only have 1095 integer labels. 1096 1097 1098 2008-10-30: Version 0.4.2 1099 1100 Improved performance of Array.prototype.concat by moving the 1101 implementation to C++ (issue 123). 1102 1103 Fixed heap growth policy to avoid growing old space to its maximum 1104 capacity before doing a garbage collection and fixed issue that 1105 would lead to artificial out of memory situations (issue 129). 1106 1107 Fixed Date.prototype.toLocaleDateString to return the date in the 1108 same format as WebKit. 1109 1110 Added missing initialization checks to debugger API. 1111 1112 Added removing of unused maps during GC. 1113 1114 1115 2008-10-28: Version 0.4.1 1116 1117 Added caching of RegExp data in compilation cache. 1118 1119 Added Visual Studio project file for d8 shell. 1120 1121 Fixed function call performance regression introduced in version 1122 0.4.0 when splitting the global object in two parts (issue 120). 1123 1124 Fixed issue 131 by checking for empty handles before throwing and 1125 reporting exceptions. 1126 1127 1128 2008-10-23: Version 0.4.0 1129 1130 Split the global object into two parts: The state holding global 1131 object and the global object proxy. 1132 1133 Fixed bug that affected the value of an assignment to an element 1134 in certain cases (issue 116). 1135 1136 Added GetPropertyNames functionality (issue 33) and extra Date 1137 functions (issue 77) to the API. 1138 1139 Changed WeakReferenceCallback to take a Persistent<Value> instead 1140 of a Persistent<Object> (issue 101). 1141 1142 Fixed issues with message reporting for exceptions in try-finally 1143 blocks (issues 73 and 75). 1144 1145 Optimized flattening of strings and string equality checking. 1146 1147 Improved Boyer-Moore implementation for faster indexOf operations. 1148 1149 Added development shell (d8) which includes counters and 1150 completion support. 1151 1152 Fixed problem with the receiver passed to functions called from 1153 eval (issue 124). 1154 1155 1156 2008-10-16: Version 0.3.5 1157 1158 Improved string hash-code distribution by excluding bit-field bits 1159 from the hash-code. 1160 1161 Changed string search algorithm used in indexOf from KMP to 1162 Boyer-Moore. 1163 1164 Improved the generated code for the instanceof operator. 1165 1166 Improved performance of slow-case string equality checks by 1167 specializing the code based on the string representation. 1168 1169 Improve the handling of out-of-memory situations (issue 70). 1170 1171 Improved performance of strict equality checks. 1172 1173 Improved profiler output to make it easier to see anonymous 1174 functions. 1175 1176 Improved performance of slow-case keyed loads. 1177 1178 Improved property access performance by allocating a number of 1179 properties in the front object. 1180 1181 Changed the toString behavior on the built-in object constructors 1182 to print [native code] instead of the actual source. Some web 1183 applications do not like constructors with complex toString 1184 results. 1185 1186 1187 2008-10-06: Version 0.3.4 1188 1189 Changed Array.prototype.sort to use quick sort. 1190 1191 Fixed code generation issue where leaving a finally block with 1192 break or continue would accumulate elements on the expression 1193 stack (issue 86). 1194 1195 Made sure that the name accessor on functions returns the expected 1196 names for builtin JavaScript functions and C++ callback functions. 1197 1198 Added fast case code for extending the property storage array of 1199 JavaScript objects. 1200 1201 Ported switch statement optimizations introduced in version 0.3.3 1202 to the ARM code generator. 1203 1204 Allowed GCC to use strict-aliasing rules when compiling. 1205 1206 Improved performance of arguments object allocation by taking care 1207 of arguments adaptor frames in the generated code. 1208 1209 Updated the V8 benchmark suite to version 2. 1210 1211 1212 2008-09-25: Version 0.3.3 1213 1214 Improved handling of relocation information to enable more 1215 peep-hole optimizations. 1216 1217 Optimized switch statements where all labels are constant small 1218 integers. 1219 1220 Optimized String.prototype.indexOf for common cases. 1221 1222 Fixed more build issues (issue 80). 1223 1224 Fixed a couple of profiler issues. 1225 1226 Fixed bug where the body of a function created using the Function 1227 constructor was not allowed to end with a single-line comment 1228 (issue 85). 1229 1230 Improved handling of object literals by canonicalizing object 1231 literal maps. This will allow JSON objects with the same set of 1232 properties to share the same map making inline caching work better 1233 for JSON objects. 1234 1235 1236 2008-09-17: Version 0.3.2 1237 1238 Generalized the EvalCache into a CompilationCache and enabled it 1239 for scripts too. The current strategy is to retire all entries 1240 whenever a mark-sweep collection is started. 1241 1242 Fixed bug where switch statements containing only a default case 1243 would lead to an unbalanced stack (issue 69). 1244 1245 Fixed bug that made access to the function in a named function 1246 expression impossible in certain situations (issue 24). 1247 1248 Fixed even more build issues. 1249 1250 Optimized calling conventions on ARM. The conventions on ARM and 1251 IA-32 now match. 1252 1253 Removed static initializers for flags and counters. 1254 1255 Improved inline caching behavior for uncommon cases where lazily 1256 loading Date and RegExp code could force certain code paths go 1257 megamorphic. 1258 1259 Removed arguments adaption for builtins written in C++. This 1260 makes Array.prototype.push and Array.prototype.pop slightly 1261 faster. 1262 1263 1264 2008-09-11: Version 0.3.1 1265 1266 Fixed a number of build issues. 1267 1268 Fixed problem with missing I-cache flusing on ARM. 1269 1270 Changed space layout in memory management by splitting up 1271 code space into old data space and code space. 1272 1273 Added utf-8 conversion support to the API (issue 57). 1274 1275 Optimized repeated calls to eval with the same strings. These 1276 repeated calls are common in web applications. 1277 1278 Added Xcode project file. 1279 1280 Optimized a couple of Array operation. 1281 1282 Fixed parser bug by checking for end-of-string when parsing break 1283 and continue (issue 35). 1284 1285 Fixed problem where asian characters were not categorized as 1286 letters. 1287 1288 Fixed bug that disallowed calling functions fetched from an array 1289 using a string as an array index (issue 32). 1290 1291 Fixed bug where the internal field count on object templates were 1292 sometimes ignored (issue 54). 1293 1294 Added -f option to the shell sample for compatibility with other 1295 engines (issue 18). 1296 1297 Added source info to TryCatches in the API. 1298 1299 Fixed problem where the seed for the random number generator was 1300 clipped in a double to unsigned int conversion. 1301 1302 Fixed bug where cons string symbols were sometimes converted to 1303 non-symbol flat strings during GC. 1304 1305 Fixed bug in error reporting when attempting to convert null to an 1306 object. 1307 1308 1309 2008-09-04: Version 0.3.0 1310 1311 Added support for running tests on the ARM simulator. 1312 1313 Fixed bug in the 'in' operator where negative indices were not 1314 treated correctly. 1315 1316 Fixed build issues on gcc-4.3.1. 1317 1318 Changed Date.prototype.toLocaleTimeString to not print the 1319 timezone part of the time. 1320 1321 Renamed debug.h to v8-debug.h to reduce the risk of name conflicts 1322 with user code. 1323 1324 1325 2008-09-02: Version 0.2.5 1326 1327 Renamed the top level directory 'public' to 'include'. 1328 1329 Added 'env' option to the SCons build scripts to support 1330 overriding the ENV part of the build environment. This is mostly 1331 to support Windows builds in cases where SCons cannot find the 1332 correct paths to the Windows SDK, as these paths cannot be passed 1333 through shell environment variables. 1334 1335 Enabled "Buffer Security Check" on for the Windows SCons build and 1336 added the linker option /OPT:ICF as an optimization. 1337 1338 Added the V8 benchmark suite to the repository. 1339 1340 1341 2008-09-01: Version 0.2.4 1342 1343 Included mjsunit JavaScript test suite and C++ unit tests. 1344 1345 Changed the shell sample to not print the result of executing a 1346 script provided on the command line. 1347 1348 Fixed issue when building samples on Windows using a shared V8 1349 library. Added visibility option on Linux build which makes the 1350 generated library 18% smaller. 1351 1352 Changed build system to accept multiple build modes in one build 1353 and generate separate objects, libraries and executables for each 1354 mode. 1355 1356 Removed deferred negation optimization (a * -b => -(a * b)) since 1357 this visibly changes operand conversion order. 1358 1359 Improved parsing performance by introducing stack guard in 1360 preparsing. Without a stack guard preparsing always bails out 1361 with stack overflow. 1362 1363 Changed shell sample to take flags directly from the command-line. 1364 Added API call that implements this. 1365 1366 Added load, quit and version functions to the shell sample so it's 1367 easier to run benchmarks and tests. 1368 1369 Fixed issue with building samples and cctests on 64-bit machines. 1370 1371 Fixed bug in the runtime system where the prototype chain was not 1372 always searched for a setter when setting a property that does not 1373 exist locally. 1374 1375 1376 2008-08-14: Version 0.2.3 1377 1378 Improved performance of garbage collection by moving the 1379 function that updates pointers during compacting collection 1380 into the updating visitor. This gives the compiler a better 1381 chance to inline and avoid a function call per (potential) 1382 pointer. 1383 1384 Extended the shell sample with a --runtime-flags option. 1385 1386 Added Visual Studio project files for the shell.cc and 1387 process.cc samples. 1388 1389 1390 2008-08-13: Version 0.2.2 1391 1392 Improved performance of garbage collection by changing the way 1393 we use the marking stack in the event of stack overflow during 1394 full garbage collection and by changing the way we mark roots. 1395 1396 Cleaned up ARM version by removing top of stack caching and by 1397 introducing push/pop elimination. 1398 1399 Cleaned up the way runtime functions are called to allow 1400 runtime calls with no arguments. 1401 1402 Changed Windows build options to make sure that exceptions are 1403 disabled and that optimization flags are enabled. 1404 1405 Added first version of Visual Studio project files. 1406 1407 1408 2008-08-06: Version 0.2.1 1409 1410 Improved performance of unary addition by avoiding runtime calls. 1411 1412 Fixed the handling of '>' and '<=' to use right-to-left conversion 1413 and left-to-right evaluation as specified by ECMA-262. 1414 1415 Fixed a branch elimination bug on the ARM platform where incorrect 1416 code was generated because of overly aggressive branch 1417 elimination. 1418 1419 Improved performance of code that repeatedly assigns the same 1420 function to the same property of different objects with the same 1421 map. 1422 1423 Untangled DEBUG and ENABLE_DISASSEMBLER defines. The disassembler 1424 no longer expects DEBUG to be defined. 1425 1426 Added platform-nullos.cc to serve as the basis for new platform 1427 implementations. 1428 1429 1430 2008-07-30: Version 0.2.0 1431 1432 Changed all text files to have native svn:eol-style. 1433 1434 Added a few samples and support for building them. The samples 1435 include a simple shell that can be used to benchmark and test V8. 1436 1437 Changed V8::GetVersion to return the version as a string. 1438 1439 Added source for lazily loaded scripts to snapshots and made 1440 serialization non-destructive. 1441 1442 Improved ARM support by fixing the write barrier code to use 1443 aligned loads and stores and by removing premature locals 1444 optimization that relied on broken support for callee-saved 1445 registers (removed). 1446 1447 Refactored the code for marking live objects during garbage 1448 collection and the code for allocating objects in paged 1449 spaces. Introduced an abstraction for the map word of a heap- 1450 allocated object and changed the memory allocator to allocate 1451 executable memory only for spaces that may contain code objects. 1452 1453 Moved StringBuilder to utils.h and ScopedLock to platform.h, where 1454 they can be used by debugging and logging modules. Added 1455 thread-safe message queues for dealing with debugger events. 1456 1457 Fixed the source code reported by toString for certain builtin 1458 empty functions and made sure that the prototype property of a 1459 function is enumerable. 1460 1461 Improved performance of converting values to condition flags in 1462 generated code. 1463 1464 Merged disassembler-{arch} files. 1465 1466 1467 2008-07-28: Version 0.1.4 1468 1469 Added support for storing JavaScript stack traces in a stack 1470 allocated buffer to make it visible in shallow core dumps. 1471 Controlled by the --preallocate-message-memory flag which is 1472 disabled by default. 1473 1474 1475 2008-07-25: Version 0.1.3 1476 1477 Fixed bug in JSObject::GetPropertyAttributePostInterceptor where 1478 map transitions would count as properties. 1479 1480 Allowed aliased eval invocations by treating them as evals in the 1481 global context. This may change in the future. 1482 1483 Added support for accessing the last entered context through the 1484 API and renamed Context::Current to Context::GetCurrent and 1485 Context::GetSecurityContext to Context::GetCurrentSecurityContext. 1486 1487 Fixed bug in the debugger that would cause the debugger scripts to 1488 be recursively loaded and changed all disabling of interrupts to 1489 be block-structured. 1490 1491 Made snapshot data read-only to allow it to be more easily shared 1492 across multiple users of V8 when linked as a shared library. 1493 1494 1495 2008-07-16: Version 0.1.2 1496 1497 Fixed building on Mac OS X by recognizing i386 and friends as 1498 IA-32 platforms. 1499 1500 Added propagation of stack overflow exceptions that occur while 1501 compiling nested functions. 1502 1503 Improved debugger with support for recursive break points and 1504 handling of exceptions that occur in the debugger JavaScript code. 1505 1506 Renamed GetInternal to GetInternalField and SetInternal to 1507 SetInternalField in the API and moved InternalFieldCount and 1508 SetInternalFieldCount from FunctionTemplate to ObjectTemplate. 1509 1510 1511 2008-07-09: Version 0.1.1 1512 1513 Fixed bug in stack overflow check code for IA-32 targets where a 1514 non-tagged value in register eax was pushed to the stack. 1515 1516 Fixed potential quadratic behavior when converting strings to 1517 numbers. 1518 1519 Fixed bug where the return value from Object::SetProperty could 1520 end up being the property holder instead of the written value. 1521 1522 Improved debugger support by allowing nested break points and by 1523 dealing with stack-overflows when compiling functions before 1524 setting break points in them. 1525 1526 1527 2008-07-03: Version 0.1.0 1528 1529 Initial export. 1530 1531
