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ChangeLog
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2010-08-09: Version 2.3.6
RegExp literals create a new object every time they are evaluated
(issue 704).
Object.seal and Object.freeze return the modified object (issue 809).
Fix building using GCC 4.4.4.
2010-08-04: Version 2.3.5
Added support for ES5 property names. Object initialisers and
dot-notation property access now allows keywords. Also allowed
non-identifiers after "get" or "set" in an object initialiser.
Randomize the addresses of allocated executable memory on Windows.
2010-08-02: Version 2.3.4
Fixed problems in implementation of ES5 function.prototype.bind.
Fixed error when using apply with arguments object on ARM (issue 784).
Added setting of global flags to debugger protocol.
Fixed an error affecting cached results of sin and cos (issue 792).
Removed memory leak from a boundary case where V8 is not initialized.
Fixed issue where debugger could set breakpoints outside the body
of a function.
Fixed issue in debugger when using both live edit and step in features.
Added Number-letter (Nl) category to Unicode tables. These characters
can now be used in identifiers.
Fixed an assert failure on X64 (issue 806).
Performance improvements on all platforms.
2010-07-26: Version 2.3.3
Fixed error when building the d8 shell in a fresh checkout.
Implemented Function.prototype.bind (ES5 15.3.4.5).
Fixed an error in inlined stores on ia32.
Fixed an error when setting a breakpoint at the end of a function
that does not end with a newline character.
Performance improvements on all platforms.
2010-07-21: Version 2.3.2
Fixed compiler warnings when building with LLVM.
Fixed a bug with for-in applied to strings (issue 785).
Performance improvements on all platforms.
2010-07-19: Version 2.3.1
Fixed compilation and linking with V8_INTERPRETED_REGEXP flag.
Fixed bug related to code flushing while compiling a lazy
compilable function (issue http://crbug.com/49099).
Performance improvements on all platforms.
2010-07-15: Version 2.3.0
Added ES5 Object.seal and Object.isSealed.
Added debugger API for scheduling debugger commands from a
separate thread.
2010-07-14: Version 2.2.24
Added API for capturing stack traces for uncaught exceptions.
Fixed crash bug when preparsing from a non-external V8 string
(issue 775).
Fixed JSON.parse bug causing input not to be converted to string
(issue 764).
Added ES5 Object.freeze and Object.isFrozen.
Performance improvements on all platforms.
2010-07-07: Version 2.2.23
API change: Convert Unicode code points outside the basic multilingual
plane to the replacement character. Previous behavior was to silently
truncate the value to 16 bits.
Fixed crash: handle all flat string types in regexp replace.
Prevent invalid pre-parsing data passed in through the API from
crashing V8.
Performance improvements on all platforms.
2010-07-05: Version 2.2.22
Added ES5 Object.isExtensible and Object.preventExtensions.
Enabled building V8 as a DLL.
Fixed a bug in date code where -0 was not interpreted as 0
(issue 736).
Performance improvements on all platforms.
2010-06-30: Version 2.2.21
Fix bug in externalizing some ASCII strings (Chromium issue 47824).
Update JSON.stringify to floor the space parameter (issue 753).
Update the Mozilla test expectations to the newest version.
Update the ES5 Conformance Test expectations to the latest version.
Update the V8 benchmark suite.
Provide actual breakpoints locations in response to setBreakpoint
and listBreakpoints requests.
2010-06-28: Version 2.2.20
Fix bug with for-in on x64 platform (issue 748).
Fix crash bug on x64 platform (issue 756).
Fix bug in Object.getOwnPropertyNames. (chromium issue 41243).
Fix a bug on ARM that caused the result of 1 << x to be
miscalculated for some inputs.
Performance improvements on all platforms.
2010-06-23: Version 2.2.19
Fix bug that causes the build to break when profillingsupport=off
(issue 738).
Added expose-externalize-string flag for testing extensions.
Resolve linker issues with using V8 as a DLL causing a number of
problems with unresolved symbols.
Fix build failure for cctests when ENABLE_DEBUGGER_SUPPORT is not
defined.
Performance improvements on all platforms.
2010-06-16: Version 2.2.18
Added API functions to retrieve information on indexed properties
managed by the embedding layer. Fixes bug 737.
Make ES5 Object.defineProperty support array elements. Fixes bug 619.
Add heap profiling to the API.
Remove old named property query from the API.
Incremental performance improvements.
2010-06-14: Version 2.2.17
Improved debugger support for stepping out of functions.
Incremental performance improvements.
2010-06-09: Version 2.2.16
Removed the SetExternalStringDiposeCallback API. Changed the
disposal of external string resources to call a virtual Dispose
method on the resource.
Added support for more precise break points when debugging and
stepping.
Memory usage improvements on all platforms.
2010-06-07: Version 2.2.15
Add an API to control the disposal of external string resources.
Add missing initialization of a couple of variables which makes
some compilers complaint when compiling with -Werror.
Improve performance on all platforms.
2010-06-02: Version 2.2.14
Fixed a crash in code generated for String.charCodeAt.
Fixed a compilation issue with some GCC versions (issue 727).
Performance optimizations on x64 and ARM platforms.
2010-05-31: Version 2.2.13
Implement Object.getOwnPropertyDescriptor for element indices and
strings (issue 599).
Fix bug for windows 64 bit C calls from generated code.
Add new scons flag unalignedaccesses for arm builds.
Performance improvements on all platforms.
2010-05-26: Version 2.2.12
Allowed accessors to be defined on objects rather than just object
templates.
Changed the ScriptData API.
2010-05-21: Version 2.2.11
Fix crash bug in liveedit on 64 bit.
Use 'full compiler' when debugging is active. This should increase
the density of possible break points, making single step more fine
grained. This will only take effect for functions compiled after
debugging has been started, so recompilation of all functions is
required to get the full effect. IA32 and x64 only for now.
Misc. fixes to the Solaris build.
Add new flags --print-cumulative-gc-stat and --trace-gc-nvp.
Add filtering of CPU profiles by security context.
Fix crash bug on ARM when running without VFP2 or VFP3.
Incremental performance improvements in all backends.
2010-05-17: Version 2.2.10
Performance improvements in the x64 and ARM backends.
2010-05-10: Version 2.2.9
Allow Object.create to be called with a function (issue 697).
Fixed bug with Date.parse returning a non-NaN value when called on a
non date string (issue 696).
Allow unaligned memory accesses on ARM targets that support it (by
Subrato K De of CodeAurora <subratokde@codeaurora.org>).
C++ API for retrieving JavaScript stack trace information.
2010-05-05: Version 2.2.8
Performance improvements in the x64 and ARM backends.
2010-05-03: Version 2.2.7
Added support for ES5 date time string format to Date.parse.
Performance improvements in the x64 backend.
2010-04-28: Version 2.2.6
Added "amd64" as recognized architecture in scons build script
(by Ryan Dahl <coldredlemur@gmail.com>).
Fixed bug in String search and replace with very simple RegExps.
Fixed bug in RegExp containing "\b^".
Performance improvements on all platforms.
2010-04-26: Version 2.2.5
Various performance improvements (especially for ARM and x64)
Fixed bug in CPU profiling (http://crbug.com/42137)
Fixed a bug with the natives cache.
Fixed two bugs in the ARM code generator that can cause
wrong calculations.
Fixed a bug that may cause a wrong result for shift operations.
2010-04-21: Version 2.2.4
Fixed warnings on arm on newer GCC versions.
Fixed a number of minor bugs.
Performance improvements on all platforms.
2010-04-14: Version 2.2.3
Added stack command and mem command to ARM simulator debugger.
Fixed scons snapshot and ARM build, and Windows X64 build issues.
Performance improvements on all platforms.
2010-04-12: Version 2.2.2
Introduced new profiler API.
Fixed random number generator to produce full 32 random bits.
2010-04-06: Version 2.2.1
Debugger improvements.
Fixed minor bugs.
2010-03-29: Version 2.2.0
Fixed a few minor bugs.
Performance improvements for string operations.
2010-03-26: Version 2.1.10
Fixed scons build issues.
Fixed a couple of minor bugs.
2010-03-25: Version 2.1.9
Added API support for reattaching a global object to a context.
Extended debugger API with access to the internal debugger context.
Fixed Chromium crashes (issues http://crbug.com/39128 and
http://crbug.com/39160)
2010-03-24: Version 2.1.8
Added fine-grained garbage collection callbacks to the API.
Performance improvements on all platforms.
2010-03-22: Version 2.1.7
Fixed issue 650.
Fixed a bug where __proto__ was sometimes enumerated (issue 646).
Performance improvements for arithmetic operations.
Performance improvements for string operations.
Print script name and line number information in stack trace.
2010-03-17: Version 2.1.6
Performance improvements for arithmetic operations.
Performance improvements for string operations.
2010-03-10: Version 2.1.4
Fixed code cache lookup for keyed IC's (issue http://crbug.com/37853).
Performance improvements on all platforms.
2010-03-10: Version 2.1.3
Added API method for context-disposal notifications.
Added API method for accessing elements by integer index.
Added missing implementation of Uint32::Value and Value::IsUint32
API methods.
Added IsExecutionTerminating API method.
Disabled strict aliasing for GCC 4.4.
Fixed string-concatenation bug (issue 636).
Performance improvements on all platforms.
2010-02-23: Version 2.1.2
Fix a crash bug caused by wrong assert.
Fix a bug with register names on 64-bit V8 (issue 615).
Performance improvements on all platforms.
2010-02-19: Version 2.1.1
[ES5] Implemented Object.defineProperty.
Improved profiler support.
Added SetPrototype method in the public V8 API.
Added GetScriptOrigin and GetScriptLineNumber methods to Function
objects in the API.
Performance improvements on all platforms.
2010-02-03: Version 2.1.0
Values are now always wrapped in objects when used as a receiver.
(issue 223).
[ES5] Implemented Object.getOwnPropertyNames.
[ES5] Restrict JSON.parse to only accept strings that conforms to the
JSON grammar.
Improvement of debugger agent (issue 549 and 554).
Fixed problem with skipped stack frame in profiles (issue 553).
Solaris support by Erich Ocean <erich.ocean@me.com> and Ryan Dahl
<ry@tinyclouds.org>.
Fix a bug that Math.round() returns incorrect results for huge
integers.
Fix enumeration order for objects created from some constructor
functions (isue http://crbug.com/3867).
Fix arithmetic on some integer constants (issue 580).
Numerous performance improvements including porting of previous IA-32
optimizations to x64 and ARM architectures.
2010-01-14: Version 2.0.6
Added ES5 Object.getPrototypeOf, GetOwnPropertyDescriptor,
GetOwnProperty, FromPropertyDescriptor.
Fixed Mac x64 build errors.
Improved performance of some math and string operations.
Improved performance of some regexp operations.
Improved performance of context creation.
Improved performance of hash tables.
2009-12-18: Version 2.0.5
Extended to upper limit of map space to allow for 7 times as many map
to be allocated (issue 524).
Improved performance of code using closures.
Improved performance of some binary operations involving doubles.
2009-12-16: Version 2.0.4
Added ECMAScript 5 Object.create.
Improved performance of Math.max and Math.min.
Optimized adding of strings on 64-bit platforms.
Improved handling of external strings by using a separate table
instead of weak handles. This improves garbage collection
performance and uses less memory.
Changed code generation for object and array literals in toplevel
code to be more compact by doing more work in the runtime.
Fixed a crash bug triggered when garbage collection happened during
generation of a callback load inline cache stub.
Fixed crash bug sometimes triggered when local variables shadowed
parameters in functions that used the arguments object.
2009-12-03: Version 2.0.3
Optimized handling and adding of strings, for-in and Array.join.
Heap serialization is now non-destructive.
Improved profiler support with information on time spend in C++
callbacks registered through the API.
Added commands to the debugger protocol for starting/stopping
profiling.
Enabled the non-optimizing compiler for top-level code.
Changed the API to only allow strings to be set as data objects on
Contexts and scripts to avoid potentially keeping global objects
around for too long (issue 528).
OpenBSD support patch by Peter Valchev <pvalchev@gmail.com>.
Fixed bugs.
2009-11-24: Version 2.0.2
Improved profiler support.
Fixed bug that broke compilation of d8 with readline support.
2009-11-20: Version 2.0.1
Fixed crash bug in String.prototype.replace.
Reverted a change which caused Chromium interactive ui test
failures.
2009-11-18: Version 2.0.0
Added support for VFP on ARM.
Added TryCatch::ReThrow method to the API.
Reduced the size of snapshots and improved the snapshot load time.
Improved heap profiler support.
64-bit version now supported on Windows.
Fixed a number of debugger issues.
Fixed bugs.
2009-10-29: Version 1.3.18
Reverted a change which caused crashes in RegExp replace.
Reverted a change which caused Chromium ui_tests failure.
2009-10-28: Version 1.3.17
Added API method to get simple heap statistics.
Improved heap profiler support.
Fixed the implementation of the resource constraint API so it
works when using snapshots.
Fixed a number of issues in the Windows 64-bit version.
Optimized calls to API getters.
Added valgrind notification on code modification to the 64-bit version.
Fixed issue where we logged shared library addresses on Windows at
startup and never used them.
2009-10-16: Version 1.3.16
X64: Convert smis to holding 32 bits of payload.
Introduce v8::Integer::NewFromUnsigned method.
Add missing null check in Context::GetCurrent.
Add trim, trimLeft and trimRight methods to String
Patch by Jan de Mooij <jandemooij@gmail.com>
Implement ES5 Array.isArray
Patch by Jan de Mooij <jandemooij@gmail.com>
Skip access checks for hidden properties.
Add String::Concat(Handle<String> left, Handle<String> right) to the V8 API.
Fix GYP-based builds of V8.
2009-10-07: Version 1.3.15
Expand the maximum size of the code space to 512MB for 64-bit mode.
Fixed a crash bug happening when starting profiling (issue
http://crbug.com/23768).
2009-10-07: Version 1.3.14
Added GetRealNamedProperty to the API to lookup real properties
located on the object or in the prototype chain skipping any
interceptors.
Fix the stack limits setting API to work correctly with threads. The
stack limit now needs to be set to each thread thich is used with V8.
Remove the high-priority flag from IdleNotification()
Ensure V8 is initialized before locking and unlocking threads.
Implemented a new JavaScript minifier for compressing the source of
the built-in JavaScript. This removes non-Open Source code from Douglas
Crockford from the project.
Added a missing optimization in StringCharAt.
Fixed some flaky socket tests.
Change by Alexander Botero-Lowry to fix profiler sampling on FreeBSD
in 64-bit mode.
Fixed memory leaks in the thread management code.
Fixed the result of assignment to a pixel array. The assigned value
is now the result.
Error reporting for invalid left-hand sides in for-in statements, pre-
and postfix count expressions, and assignments now matches the JSC
behavior in Safari 4.
Follow the spec in disallowing function declarations without a name.
Always allocate code objects within a 2 GB range. On x64 architecture
this is used to use near calls (32-bit displacement) in Code objects.
Optimized array construction ported to x64 and ARM architectures.
[ES5] Changed Object.keys to return strings for element indices.
2009-09-23: Version 1.3.13
Fixed uninitialized memory problem.
Improved heap profiler support.
2009-09-22: Version 1.3.12
Changed behavior of |function|.toString() on built-in functions to
be compatible with other implementations. Patch by Jan de Mooij.
Added Object::IsDirty in the API.
Optimized array construction; it is now handled purely in native
code.
[ES5] Made properties of the arguments array enumerable.
[ES5] Added test suite adapter for the es5conform test suite.
[ES5] Added Object.keys function.
2009-09-15: Version 1.3.11
Fixed crash in error reporting during bootstrapping.
Optimized generated IA32 math code by using SSE2 instructions when
available.
Implemented missing pieces of debugger infrastructure on ARM. The
debugger is now fully functional on ARM.
Make 'hidden' the default visibility for gcc.
2009-09-09: Version 1.3.10
Fixed profiler on Mac in 64-bit mode.
Optimized creation of objects from simple constructor functions on
ARM.
Fixed a number of debugger issues.
Reduced the amount of memory consumed by V8.
2009-09-02: Version 1.3.9
Optimized stack guard checks on ARM.
Optimized API operations by inlining more in the API.
Optimized creation of objects from simple constructor functions.
Enabled a number of missing optimizations in the 64-bit port.
Implemented native-code support for regular expressions on ARM.
Stopped using the 'sahf' instruction on 64-bit machines that do
not support it.
Fixed a bug in the support for forceful termination of JavaScript
execution.
2009-08-26: Version 1.3.8
Changed the handling of idle notifications to allow idle
notifications when V8 has not yet been initialized.
Fixed ARM simulator compilation problem on Windows.
2009-08-25: Version 1.3.7
Reduced the size of generated code on ARM platforms by reducing
the size of constant pools.
Changed build files to not include the 'ENV' user environment
variable in the build environment.
Changed the handling of idle notifications.
2009-08-21: Version 1.3.6
Add support for forceful termination of JavaScript execution.
Add low memory notification to the API. The embedding host can signal
a low memory situation to V8.
Changed the handling of global handles (persistent handles in the API
sense) to avoid issues regarding allocation of new global handles
during weak handle callbacks.
Changed the growth policy of the young space.
Fixed a GC issue introduced in version 1.3.5.
2009-08-19: Version 1.3.5
Optimize initialization of some arrays in the builtins.
Fix mac-nm script to support filenames with spaces.
Support for using the V8 profiler when V8 is embedded in a Windows DLL.
Changed typeof RegExp from 'object' to 'function' for compatibility.
Fixed bug where regexps were not callable across contexts.
Added context independent script compilation to the API.
Added API call to get the stack trace for an exception.
Added API for getting object mirrors.
Make sure that SSE3 instructions are used whenever possible even when
running off a snapshot generated without using SSE3 instructions.
Tweaked the handling of the initial size and growth policy of the heap.
Added native code generation for RegExp to 64-bit version.
Added JavaScript debugger support to 64-bit version.
2009-08-13: Version 1.3.4
Added a readline() command to the d8 shell.
Fixed bug in json parsing.
Added idle notification to the API and reduced memory on idle
notifications.
2009-08-12: Version 1.3.3
Fix issue 417: incorrect %t placeholder expansion.
Add .gitignore file similar to Chromium's one.
Fix SConstruct file to build with new logging code for Android.
API: added function to find instance of template in prototype
chain. Inlined Object::IsInstanceOf.
Land change to notify valgrind when we modify code on x86.
Add api call to determine whether a string can be externalized.
Add a write() command to d8.
2009-08-05: Version 1.3.2
Started new compiler infrastructure for two-pass compilation using a
control flow graph constructed from the AST.
Profiler stack sampling for X64.
Safe handling of NaN to Posix platform-dependent time functions.
Added a new profiler control API to unify controlling various aspects
of profiling.
Fixed issue 392.
2009-07-30: Version 1.3.1
Speed improvements to accessors and interceptors.
Added support for capturing stack information on custom errors.
Added support for morphing an object into a pixel array where its
indexed properties are stored in an external byte array. Values written
are always clamped to the 0..255 interval.
Profiler on x64 now handles C/C++ functions from shared libraries.
Changed the debugger to avoid stepping into function.call/apply if the
function is a built-in.
Initial implementation of constructor heap profile for JS objects.
More fine grained control of profiling aspects through the API.
Optimized the called as constructor check for API calls.
2009-07-27: Version 1.3.0
Allowed RegExp objects to be called as functions (issue 132).
Fixed issue where global property cells would escape after
detaching the global object; see http://crbug.com/16276.
Added support for stepping into setters and getters in the
debugger.
Changed the debugger to avoid stopping in its own JavaScript code
and in the code of built-in functions.
Fixed issue 345 by avoiding duplicate escaping labels.
Fixed ARM code generator crash in short-circuited boolean
expressions and added regression tests.
Added an external allocation limit to avoid issues where small V8
objects would hold on to large amounts of external memory without
causing garbage collections.
Finished more of the inline caching stubs for x64 targets.
2009-07-13: Version 1.2.14
Added separate paged heap space for global property cells and
avoid updating the write barrier when storing into them.
Improved peep-hole optimization on ARM platforms by not emitting
unnecessary debug information.
Re-enabled ICs for loads and calls that skip a global object
during lookup through the prototype chain.
Allowed access through global proxies to use ICs.
Fixed issue 401.
2009-07-09: Version 1.2.13
Fixed issue 397, issue 398, and issue 399.
Added support for breakpoint groups.
Fixed bugs introduced with the new global object representation.
Fixed a few bugs in the ARM code generator.
2009-07-06: Version 1.2.12
Added stack traces collection to Error objects accessible through
the e.stack property.
Changed RegExp parser to use a recursive data structure instead of
stack-based recursion.
Optimized Date object construction and string concatenation.
Improved performance of div, mod, and mul on ARM platforms.
2009-07-02: Version 1.2.11
Improved performance on IA-32 and ARM.
Fixed profiler sampler implementation on Mac OS X.
Changed the representation of global objects to improve
performance of adding a lot of new properties.
2009-06-29: Version 1.2.10
Improved debugger support.
Fixed bug in exception message reporting (issue 390).
Improved overall performance.
2009-06-23: Version 1.2.9
Improved math performance on ARM.
Fixed profiler name-inference bug.
Fixed handling of shared libraries in the profiler tick processor
scripts.
Fixed handling of tests that time out in the test scripts.
Fixed compilation on MacOS X version 10.4.
Fixed two bugs in the regular expression engine.
Fixed a bug in the string type inference.
Fixed a bug in the handling of 'constant function' properties.
Improved overall performance.
2009-06-16: Version 1.2.8
Optimized math on ARM platforms.
Fixed two crash bugs in the handling of getters and setters.
Improved the debugger support by adding scope chain information.
Improved the profiler support by compressing log data transmitted
to clients.
Improved overall performance.
2009-06-08: Version 1.2.7
Improved debugger and profiler support.