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ChangeLog
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ChangeLog
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2012-01-05: Version 3.8.5
Fix broken test that assumes that no GC can clear the regexp cache (GC
can happen at any time due to Crankshaft).
Fix handling of bogus receivers for Harmony collections. (issue 1884)
Add netbsd support to gyp build.
Determine page size at runtime on posix platforms.
Ensure that store buffer filtering hash sets are cleared after
StoreBuffer::Filter.
Randomize the seed used for string hashing. This helps guard against
CPU-eating DOS attacks against node.js servers. Based on code from
Bert Belder. This version only solves the issue for those that compile
V8 themselves or those that do not use snapshots. A snapshot-based
precompiled V8 will still have predictable string hash codes.
Implement callback when script finishes running in V8 API.
Improve performance of Math.min and Math.max for the case of two
arguments. (issue 1325)
2012-01-02: Version 3.8.4
Performance improvements for large Smi-only arrays.
Fixed InternalArrays construction. (issue 1878)
2011-12-27: Version 3.8.3
Avoid embedding new space objects into code objects in the lithium gap
resolver. (chromium:108296)
Bug fixes and performance optimizations on all platforms.
2011-12-21: Version 3.8.2
Add max optimization flag to v8 gyp build to ensure V8 is always built
fully optimized in Chrome.
MIPS: Bring MIPS to parity with other platforms.
Optimizations and stability improvements on all platforms.
2011-12-19: Version 3.8.1
Fixed GCC 4.7 warnings. Patch from Tobias Burnus.
Stability improvements on all platforms.
2011-12-13: Version 3.8.0
Fixed handling of arrays in DefineOwnProperty. (issue 1756)
Sync parser and preparser on do-while and return statements.
(issue 1856)
Fixed another corner case for DefineOwnProperty on arrays (issue 1756).
Stability and performance improvements on all platforms.
2011-12-01: Version 3.7.12
Increase tick interval for the android platform.
Fix a bug in the register allocator. (chromium:105112)
Fix handling of recompiling code. (chromium:105375, v8:1782)
Start incremental marking on idle notification. (v8:1458)
Build fixes for various platforms.
Various performance improvements.
2011-11-29: Version 3.7.11
Fixed bug when generating padding to ensure space for lazy
deoptimization.
(issue 1846)
Further reduced pause times due to GC.
Stability and performance improvements on all platforms.
2011-11-23: Version 3.7.10
Set maximum length of FixedArray in terms of elements instead an
absolute number of bytes.
(Chromium issue 103103)
Stability and performance improvements on all platforms.
2011-11-21: Version 3.7.9
Removed exit-time destructors.
Stability and performance improvements on all platforms.
2011-11-17: Version 3.7.8
Removed hidden prototype from builtins, i.e., deleting an overridden
function on builtins will not make the original function reappear.
Added NetBSD support for scons build.
Performance improvements on all platforms.
2011-11-14: Version 3.7.7
Fix missing fast property accessors in heap snapshots.
(issue 1818)
2011-11-11: Version 3.7.6
Fixed filtering of store buffer for large object pages.
(issue 1817)
Fixed generated hash function on all platforms.
(issue 1808)
Fixed Heap::Shrink to ensure that it does not free pages that are
still in use.
(Chromium issue 100414)
Stability and performance improvements on all platforms.
2011-11-10: Version 3.7.5
Added initial gyp infrastructure for MIPS.
Implemented performance improvements to the incremental garbage
collector.
Added optimizations and stability improvements on all platforms.
2011-11-07: Version 3.7.4
Proper "libv8.so.3.7.4" SONAME for Linux shared library (issue 1786).
Fix Harmony sets and maps to allow null and undefined as keys
(still hidden behind --harmony flag) (issue 1622).
Implement VirtualMemory on FreeBSD to fix build (issue 1807).
Enable VFP instructions for Android.
Fix error handling in Date.prototype.toISOString (issue 1792).
Bug fixes and performance improvements for all platforms.
Not officially supported but noteworthy: Crankshaft for MIPS :-)
2011-10-28: Version 3.7.3
Slight deoptimization as a workaround for issue with jslint: Issue
1789.
2011-10-27: Version 3.7.2
Fix bug in deoptimization. Known issue with jslint: Issue 1789.
2011-10-26: Version 3.7.1
Achieved 33% speedup in debug-mode tests.
Removed special casing of calls to RegExp test and exec methods with no
argument. Now matches new JSC behaviour. crbug.com/75740.
Return the empty string on cyclic references in toString (ES5
conformance).
Fixed bug triggered by JSBeautifier. crbug.com/100409.
Made Math.random state per-context instead of per-process (issue 864).
Fixed stack traces to skip native functions.
Make snapshots (new contexts) smaller and faster.
Fixed handling of Function.apply for non-array arguments.
Fixed evaluation order in defineProperties to match FireFox.
Fixed handling of non-object receivers for array builtins,
crbug.com/100702.
Multiple fixes to improve compliance with test262.
Fixed compatibility with older Android releases.
Fixed compilation with gcc-4.5.3.
Improved performance of WriteUtf8, issue 1665.
Made native syntax an early error in the preparser.
Fixed issues 793 and 893 relating to Function.prototype.bind.
Improved let, const, Set and Map support and other Harmony features
(behind the --harmony flag).
Changed evaluation order for > and <= to match ES5 instead of ES3.
Bug fixes and performance improvements on all platforms.
2011-10-13: Version 3.7.0
Fixed array handling for Object.defineOwnProperty (ES5 conformance).
Fixed issue 1757 (string slices of external strings).
Fixed issue 1759 (ARM).
Added flag --noclever-optimizations to disable some things that
caused trouble in the past.
Added flag --stress-compaction for testing.
Added flag --harmony to activate all experimental Harmony features.
2011-10-10: Version 3.6.6
Added a GC pause visualization tool.
Added presubmit=no and werror=no flags to Makefile.
ES5/Test262 conformance improvements.
Fixed compilation issues with GCC 4.5.x (issue 1743).
Bug fixes and performance improvements on all platforms.
2011-10-05: Version 3.6.5
New incremental garbage collector.
Removed the hard heap size limit (soft heap size limit is still
700/1400Mbytes by default).
Implemented ES5 generic Array.prototype.toString (Issue 1361).
V8 now allows surrogate pair codes in decodeURIComponent (Issue 1415).
Fixed x64 RegExp start-of-string bug (Issues 1746, 1748).
Fixed propertyIsEnumerable for numeric properties (Issue 1692).
Fixed the MinGW and Windows 2000 builds.
Fixed "Prototype chain is not searched if named property handler does
not set a property" (Issue 1636).
Made the RegExp.prototype object be a RegExp object (Issue 1217).
Disallowed future reserved words as labels in strict mode.
Fixed string split to correctly coerce the separator to a string
(Issue 1711).
API: Added an optional source length field to the Extension
constructor.
API: Added Debug::DisableAgent to match existing Debug::EnableAgent
(Issue 1573).
Added "native" target to Makefile for the benefit of Linux distros.
Fixed: debugger stops stepping outside evaluate (Issue 1639).
More work on ES-Harmony proxies. Still hidden behind a flag.
Bug fixes and performance improvements on all platforms.
2011-09-15: Version 3.6.4
Fixed d8's broken readline history.
Removed the need for code delete events in CPU profiler (Issue 1466).
Fixed debugger stepping next with trycatch recursion (Issue 1639).
Fixing parallel execution in d8 (with -p) and some memory leaks.
Support for precise stepping in functions compiled before debugging was
started (step 1).
2011-09-13: Version 3.6.3
Implemented better support of typed arrays in the d8 shell.
Bug fixes and performance improvements on all platforms.
2011-09-08: Version 3.6.2
Added "dependencies" target to top-level Makefile.
Added ability to turn profiler on/off in d8.
Added "soname_version" parameter to common.gypi, v8.gyp, and Makefile.
Fixed several crash bugs.
2011-09-07: Version 3.6.1
Fixed a bug in abrupt exit from with or catch inside finally.
Fixed possible crash in FixedDoubleArray::Initialize() (Chromium
issue 95113).
Fixed a bug in Page::GetRegionMaskForSpan (Chromium issue 94425).
Fixed a few clang warnings (which -Werror treated as errors).
Performance improvements on all platforms.
2011-09-05: Version 3.6.0
Fixed a bug when optimizing named function expression (issue 1647).
Fixed a bug when optimizing f.call.apply (issue 1650).
Made arguments and caller always be null on native functions
(issues 1548 and 1643).
Fixed issue 1648 (cross-compiling x64 targeting ia32).
Fixed issue 371 (d8 printing of strings containing \0).
Fixed order of evaluation in arguments to parseInt (issue 1649).
Fixed a problem with large heap snapshots in Chrome DevTools
(issue 1658, chromium issue 89268).
Upped default maximum heap size from 512M to 700M.
2011-08-31: Version 3.5.10
Added dependency of v8_base on WinSocket2 Windows library in
the GYP-build.
Various bugfixes.
2011-08-29: Version 3.5.9
Made FromPropertyDescriptor not trigger inherited setters.
Fixed .gyp files to work on the ARM simulator.
Fixed shared library build warnings for MSVS.
2011-08-24: Version 3.5.8
Added V8EXPORT attributes for v8::Array::CheckCast and
v8::Number::CheckCast.
Made a slight API change enabling opting out from null termination
in String::Write*().
Fixed arm build for gcc-4.6.
2011-08-22: Version 3.5.7
Make scanner handle invalid unicode escapes in identifiers correctly.
Make regexp flag parsing stricter.
Fix several memory leaks.
2011-08-17: Version 3.5.6
Fixed issue that could cause crashes when running with --heap-stats.
Fixed compilation on Linux 2.6.9 and older.
Fixed live-object-list to work with isolates.
Fixed memory leaks in zones and isolates.
Fixed a performance regression for TypedArrays on x64.
Stability improvements on all platforms.
2011-08-15: Version 3.5.5
Fixed bugs involving negative zero and the optimizing compiler.
Fixed optimized version of Function.apply(x, arguments). (issue 1592)
Eliminated uses of deprecated ARM instructions.
Sped up Math.floor by using SSE 4.1 roundsd instruction on ia32.
Removed restriction on the size of disassembled code that is printed.
2011-08-10: Version 3.5.4
Added a preliminary implementation of ES Harmony weak maps. Weak
maps can be enabled by the flag --harmony-weakmaps.
Introduced a toplevel Makefile to support GYP-based building. GYP
can be obtained from http://gyp.googlecode.com.
Fixed a bug in the length property of functions created by
Function.prototype.bind.
Reduced malloc heap allocation on process startup.
Several important code generation bug fixes.
Performance improvements on all platforms.
2011-08-03: Version 3.5.3
MIPS: Port of fix to ClassOf check from ARM.
Patch from Paul Lind <plind44@gmail.com>.
Stopped using mprotect on Cygwin.
Avoided uninitialized member warning on gcc 4.3.4
Both patches by Bert Belder.
Bug fixes and performance improvements on all platforms.
2011-08-01: Version 3.5.2
Performance improvements on all platforms.
2011-07-28: Version 3.5.1
Fixed setting the readonly flag on the prototype property using the
API call FunctionTemplate::SetPrototypeAttributes (issue 1539).
Changed the tools/test.py script to use d8 instead of shell for
testing.
Fixed crash in ToBooleanStub when GC happens during invocation.
Enabled automatic unboxing of double arrays.
Performance improvements on all platforms.
2011-07-25: Version 3.5.0
Implemented Object.prototype.{hasOwnProperty, propertyIsEnumerable} for
proxies.
Removed logging to memory support.
Bugfixes and performance work.
2011-07-20: Version 3.4.14
Fix the debugger for strict-mode functions. (Chromium issue 89236)
Add GetPropertyAttribute method for Object in the API. (Patch by
Peter Varga)
Fix -Wunused-but-set-variable for gcc-4.6 on x64. (Issue 1291)
2011-07-18: Version 3.4.13
Improved debugger support to allow inspection of optimized frames (issue
1140).
Fixed a bug in prototype transitions cache clearing introduced by r8165.
Fixed shortcutting bug in HInferRepresentation. Patch by Andy Wingo.
Fixed a memory leak in sample/shell.cc (dispose semaphores).
Simplified HClampToUint8. Patch by Andy Wingo.
Exposed APIs for detecting boxed primitives, native errors. Patch by
Luke Zarko.
Added map check for COW elements to crankshaft array handling code
(issue 1560).
Sample shell and (a light version of) D8 links against a shared library
now.
Fixed bug in array filter and reduce functions (issue 1559).
Avoid TLS load in AstNode constructor.
Introduced a random entropy source which can optionally be provided at
initialization. (Chromium issue 89462).
2011-07-13: Version 3.4.12
Added --prof profiling option to d8 shell.
Fixed a bug where reading a directory in d8 shell hangs (issue 1533).
Fixed a potential assertion failure in const declarations.
Fixed an assertion failure in descriptor arrays (issue 1526).
Enabled fast thread-local storage by default on supported platforms.
Improved reporting of source position for global variable loads
(issue 1527).
2011-07-11: Version 3.4.11
Fixed MinGW32 build.
Fixed a GC bug with RegExp code flushing.
Implemented Object.defineProperty for proxies.
Fixed a bug in for/in iteration of arguments objects (issue 1531).
Added debugger support for inspecting optimized frames (issue 1140).
Allowed JSObject::PreventExtensions to work for arguments objects.
Bugfixes and performance work.
2011-07-06: Version 3.4.10
Fixed debugger not breaking on certain "if" statements (issue 1523).
Fixed assertion failure in runtime profiler when running on IA32
without snapshot (issue 1522).
Fixed ABI for API calls on IA32 (for clang compatibility).
Introduced code flushing of RegExp code to free memory used by
RegExps sooner.
Fixed linux-tick-processor built wrong version of v8 (issue 1532).
Fixed assertion failure in v8::TryCache::StackTrace (issue 1529).
Performance improvements on all platforms.
2011-07-04: Version 3.4.9
Added support for debugger inspection of locals in optimized frames
(issue 1140).
Fixed SConstruct to pass correct defines to samples/preparser when
building with library=shared.
Made date parser handle ES5 Date Time Strings correctly (issue 1498).
Fixed a bug in Object.defineProperty on the arguments object.
Performance improvements on all platforms.
2011-06-29: Version 3.4.8
Ensure 16-byte stack alignment on Solaris (issue 1505).
Fix "illegal access" when calling parseInt with a radix
that is not a smi. (issue 1246).
2011-06-27: Version 3.4.7
Fixed 64-bit build on FreeBSD.
Added API to set the property attributes for the prototype
property on functions created from FunctionTemplates.
Bugfixes and performance work.
2011-06-22: Version 3.4.6
Lowered limit on code space for systems with low memory supply.
Allowed compiling v8_shell with the 'host' toolset (issue 82437).
Extended setBreakpoint API to accept partial script name (issue 1418).
Made multi-line comments not count when deciding whether the '-->'
comment starter is first on a line. This matches Safari.
Made handling of non-array recievers in Array length setter correct
(issue 1491).
Added ability to heap profiler to iterate over snapshot's node
(issue 1481).
2011-06-20: Version 3.4.5
Fixed issues 794, 1097, 1215(partial), 1417, 1435, 1472, 1473,
1476, and 1477.
Improved code generation for !0 and !1.
Reduced memory usage for regular expressions with nested qualifiers.
(issue 1472)
Fixed V8 to count line terminators in multi-line comments.
(Chromium issue 86431)
Fixed disassembler=on option for release-mode builds. (issue 1473)
Performance improvements on all platforms.
2011-06-15: Version 3.4.4
Added snapshot compression support and --stress-opt flag to d8.
Improved performance of try/catch.
Several GYP-related changes: Added support for building Xcode project
files. Make the ARM simulator build with GYP again. Generate Makefiles
for all architectures on Linux.
Fixed Array.prototype.{reduce,reduceRight} to pass undefined as the
receiver for strict mode callbacks. (issue 1436)
Fixed a bug where an array load was incorrectly hoisted by GVN.
Handle 'undefined' correctly when === has been specialized for doubles.
(issue 1434)
Corrected the limit of local variables in an optimized function from 64
to 63.
Correctly set ReadOnly flag on indexed properties when using the API Set
method. (issue 1470)
Give the correct error message when Object.isExtensible is called on a
non-object. (issue 1452)
Added GetOwnPropertyNames method for Object in the API. Patch by Peter
Varga.
Do not redefine properties unneccesarily in seal and freeze. (issue
1447)
IsExecutionTerminating has an Isolate parameter now.
Distinguish keyed loads with a symbol key from fast elements loads,
avoiding some useless deoptimizations. (issue 1471)
2011-06-08: Version 3.4.3
Clear the global thread table when an isolate is disposed
(issue 1433).
Converted time zone name to UTF8 on Windows (issue 1290).
Limited the number of arguments in a function call to 32766
(issue 1413).
Compress sources of JS libraries in addition to the snapshot.
Fixed a bug in Lithium environment iteration.
Performance improvements on all platforms.
2011-06-06: Version 3.4.2
More work on ES-Harmony proxies. Still hidden behind a flag.
Fixed some crash bugs and improved performance.
Fixed building with gdb debugging support.
Do not install SIGPROF handler until it is needed.
Added DateTimeFormat to i18n API.
Fixed compilation on OpenBSD.
Take the ulimit into account when sizing the heap. OpenBSD users
may still have to increase the default ulimit to run heavy pages in
the browser.
2011-06-01: Version 3.4.1
Fixed JSON stringify issue with arrays.
Changed calls to JS builtins to be passed undefined when called with
implicit receiver.
Implemented the set trap for Harmony proxies. Proxies still need to
be enabled with the --harmony-proxies flag.
2011-05-30: Version 3.4.0
Changed calls to undefined property setters to not throw (issue 1355).
Made RegExp objects not callable.
Fixed issues on special case large JSON strings in new json parser
(issues http://crbug.com/83877 and http://crbug.com/84186).
Performance improvements on all platforms.
2011-05-25: Version 3.3.10
Fixed calls of strict mode function with an implicit receiver.
Fixed fast handling of arrays to properly deal with changes to the
Object prototype (issue 1403).
Changed strict mode poison pill to be the same type error function
(issue 1387).
Fixed a debug crash in arguments object handling (issue 1227).
Fixed a bug in deoptimization on x64 (issue 1404).
Performance improvements and bug fixes on all platforms.
2011-05-23: Version 3.3.9
Added DateTimeFormat class to experimental i18n API.
Extended preparser to give early errors for some strict mode
restrictions.
Removed legacy execScript function from V8.
Extended isolate API with the ability to add embedder-specific
data to an isolate.
Added basic support for polymorphic loads from JS and external
arrays.
Fixed bug in handling of switch statements in the optimizing
compiler.
2011-05-18: Version 3.3.8
Added MarkIndependent to the persistent handle API. Independent
handles are independent of all other persistent handles and can be
garbage collected more frequently.
Implemented the get trap for Harmony proxies. Proxies are enabled
with the --harmony-proxies flag.
Performance improvements and bug fixes on all platforms.
2011-05-16: Version 3.3.7
Updated MIPS infrastructure files.
Performance improvements and bug fixes on all platforms.
2011-05-11: Version 3.3.6
Updated MIPS infrastructure files.
Added method IsCallable for Object to the API.
Patch by Peter Varga.
2011-05-09: Version 3.3.5
Fixed build on FreeBSD. Patch by Akinori MUSHA.
Added check that receiver is JSObject on API calls.
Implemented CallAsConstructor method for Object in the API (Issue 1348).
Patch by Peter Varga.
Added CallAsFunction method to the Object class in the API (Issue 1336).
Patch by Peter Varga.
Added per-isolate locking and unlocking.
Fixed bug in x64 >>> operator (Issue 1359).
2011-05-04: Version 3.3.4
Implemented API to disallow code generation from strings for a context
(issue 1258).
Fixed bug with whitespaces in parseInt (issue 955).
Fixed bug with == comparison of Date objects (issue 1356).
Added GYP variables for ARM code generation:
v8_can_use_vfp_instructions, v8_can_use_unaligned_accesses
and v8_use_arm_eabi_hardfloat.
2011-05-02: Version 3.3.3
Added support for generating Visual Studio solution and project files
using GYP.
Implemented support for ARM EABI calling convention variation where
floating-point arguments are passed in registers (hardfloat).
Added Object::HasOwnProperty() to the API.
Added support for compressing startup data to reduce binary size. This
includes build time support and an API for the embedder to decompress
the startup data before initializing V8.
Reduced the profiling hooks overhead from >400% to 25% when using
ll_prof.
Performance improvements and bug fixes on all platforms.
2011-04-27: Version 3.3.2
Fixed crash bug on ARM with no VFP3 hardware.
Fixed compilation of V8 without debugger support.
Improved performance on JSLint.
Added support Float64 WebGL arrays.
Fixed crash bug in regexp replace.
2011-04-20: Version 3.3.1
Reduced V8 binary size by removing virtual functions from hydrogen.
Fixed crash bug on x64.
Performance improvements on ARM and IA32.
2011-04-18: Version 3.3.0
Fixed bug in floating point rounding in Crankshaft on ARM
(issue 958)
Fixed a number of issues with running without VFPv3 support on ARM
(issue 1315)
Introduced v8Locale.Collator, a partial implementation of Collator
per last ECMAScript meeting + mailing list.
Minor performance improvements and bug fixes.
2011-04-13: Version 3.2.10
Fixed bug in external float arrays on ARM (issue 1323).
Minor performance improvements and bug fixes.
2011-04-11: Version 3.2.9
Removed support for ABI prior to EABI on ARM.
Fixed multiple crash bugs.
Added GCMole to the repository, a simple static analysis tool that
searches for GC-unsafe evaluation order dependent callsites.
Made preparser API be exported in shared libraries.
Fixed multiple issues in EcmaScript 5 strict mode implementation.
Fixed mutable __proto__ property if object is not extensible
(Issue 1309).
Fixed auto suspension of the sampler thread.
2011-04-06: Version 3.2.8
Exposed WebGL typed array constructors in the shell sample.
Performance improvements on all platforms.
2011-04-04: Version 3.2.7
Disabled the original 'classic' V8 code generator. Crankshaft is
now the default on all platforms.
Changed the heap profiler to use more descriptive names.
Performance and stability improvements to isolates on all platforms.
2011-03-30: Version 3.2.6
Fixed xcode build warning in shell.cc (out of order initialization).
Fixed null-pointer dereference in the compiler when running without
SSE3 support (Chromium issue 77654).
Fixed x64 compilation error due to some dead code. (Issue 1286)
Introduced scons target to build the preparser stand-alone example.
Made FreeBSD build and pass all tests.
2011-03-28: Version 3.2.5
Fixed build with Irregexp interpreter (issue 1266).
Added Crankshaft support for external arrays.
Fixed two potential crash bugs.
2011-03-23: Version 3.2.4
Added isolates which allows several V8 instances in the same process.
This is controlled through the new Isolate class in the API.
Implemented more of EcmaScript 5 strict mode.
Reduced the time it takes to make detailed heap snapshot.
Added a number of commands to the ARM simulator and enhanced the ARM
disassembler.
2011-03-17: Version 3.2.3
Fixed a number of crash bugs.
Fixed Array::New(length) to return an array with a length (issue 1256).
Fixed FreeBSD build.
Changed __defineGetter__ to not throw (matching the behavior of Safari).
Implemented more of EcmaScript 5 strict mode.
Improved Crankshaft performance on all platforms.
2011-03-14: Version 3.2.2
Fixed a number of crash and correctness bugs.
Improved Crankshaft performance on all platforms.
Fixed Crankshaft on Solaris/Illumos.