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ChangeLog
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2013-07-02: Version 3.20.1
Implemented WeakMap.prototype.clear function. (issue 2753)
Ensure CheckInitialized is present independent of define.
(Chromium issue 255779)
Performance and stability improvements on all platforms.
2013-06-28: Version 3.20.0
Migrated several tests from blink to V8 repository.
Allowed users of the V8 API to distinguish between unset and undefined
HiddenValues (issue 2746).
Deprecated old style callbacks in the V8 API.
Turned on parallel recompilation.
Performance and stability improvements on all platforms.
2013-06-18: Version 3.19.18
Fixed read-only attribute of Function.length in strict mode.
(issue 2705)
Fixed Runtime_SetProperty to properly handle OOM failures
(Chromium issue 249873)
Emit deprecated check for constant function transitions.
(Chromium issue 250609)
Made MathFloorOfDiv optimization trigger more often
(Issue 2205)
Make more GCs in idle notification handler.
(Chromium issue 241815)
Increased default type info threshold.
(Issue 2730)
Performance and stability improvements on all platforms.
2013-06-14: Version 3.19.16
Performance and stability improvements on all platforms.
2013-06-13: Version 3.19.15
Performance and stability improvements on all platforms.
2013-06-13: Version 3.19.14
Fixed crashes when calling new Array(a) with a single argument that
could result in creating a holey array with a packed elements kind.
(Chromium issue 245480)
Fixed issues in parallel compilation.
(Chromium issue 248076)
Performance and stability improvements on all platforms.
2013-06-11: Version 3.19.13
Performance and stability improvements on all platforms.
2013-06-10: Version 3.19.12
Fixed arguments array access. (Chromium issue 247303)
Fixed bug in LookupForWrite. (Chromium issue 242332)
Performance and stability improvements on all platforms.
2013-06-07: Version 3.19.11
Performance and stability improvements on all platforms.
2013-06-06: Version 3.19.10
Performance and stability improvements on all platforms.
2013-06-05: Version 3.19.9
Implemented Load IC support for loading properties from primitive
values to avoid perpetual soft deopts. (Chromium issue 242512)
Implemented Freeing of PerThreadAssertData when possible to avoid
memory leak. (Chromium issue 246567)
Removed V8_USE_OLD_STYLE_PERSISTENT_HANDLE_VISITORS.
Performance and stability improvements on all platforms.
2013-06-03: Version 3.19.8
Fixed bug with inlining 'Array' function. (Chromium issue 244461)
Fixed initialization of literal objects. (Chromium issue 245424)
Fixed function name inferred inside closures. (Chromium issue 224884)
Performance and stability improvements on all platforms.
2013-05-31: Version 3.19.7
Added support for //# sourceURL similar to deprecated //@ sourceURL one.
(issue 2702)
Made sure IfBuilder::Return clears the current block.
(Chromium issue 243868)
Fixed two CPU profiler tests on ARM and MIPS simulators
(issue 2628)
Fixed idle incremental GC for large objects.
(Chromium issue 241815)
Disabled --optimize-constructed-arrays due to crashes
(Chromium issue 244461)
Performance and stability improvements on all platforms.
2013-05-28: Version 3.19.6
Fixed IfBuilder::Deopt to clear the current block
(Chromium issue 243868).
Performance and stability improvements on all platforms.
2013-05-27: Version 3.19.5
Reset regexp parser flag after scanning ahead for capture groups.
(issue 2690)
Removed flakiness in test-cpu-profiler/SampleWhenFrameIsNotSetup.
(issue 2628)
Performance and stability improvements on all platforms.
2013-05-24: Version 3.19.4
Fixed edge case in stack trace formatting. (Chromium issue 237617)
Fixed embedded new-space pointer in LCmpObjectEqAndBranch. (Chromium
issue 240032)
Made Object.freeze fast (issue 1858, Chromium issue 115960)
Fixed bogus deopt in BuildEmitDeepCopy for holey arrays. (Chromium issue
242924)
Performance and stability improvements on all platforms.
2013-05-22: Version 3.19.3
Performance and stability improvements on all platforms.
2013-05-17: Version 3.19.2
Fill in one-word-fillers for the unused property fields
(Chromium issue 240056).
Removed use_system_v8 logic from the mainline gyp file
(Chromium issue 226860).
Skip CPU profiler samples where top function's stack frame is not
set up properly (issue 2628).
Performance and stability improvements on all platforms.
2013-05-14: Version 3.19.1
Fixed missing hole check for loads from Smi arrays when all uses are
changes (Chromium issue 233737)
Performance and stability improvements on all platforms.
2013-05-10: Version 3.19.0
Deprecated Context::New which returns Persistent.
Added Persistent<T>::Reset which disposes the handle and redirects it to
point to another object.
Deprecated WriteAscii and MayContainNonAscii.
Exposed AssertNoAllocation to API.
Performance and stability improvements on all platforms.
2013-04-30: Version 3.18.5
Allowed setting debugger breakpoints on CompareNilICs (issue 2660)
Fixed beyond-heap load on x64 Crankshafted StringCharFromCode
(Chromium issue 235311)
Change 'Parse error' to three more informative messages.
(Chromium issue 2636)
Performance and stability improvements on all platforms.
2013-04-26: Version 3.18.4
Added a preliminary API for ES6 ArrayBuffers
Replaced qsort with std::sort. (Chromium issue 2639)
Performance and stability improvements on all platforms.
2013-04-24: Version 3.18.3
Exposed the GC under a name that is less collision prone than window.gc.
(issue 2641)
Do not emit double values at their use sites. (Chromium issue 234101)
Added methods to allow resuming execution after calling
TerminateExecution(). (issue 2361)
Performance and stability improvements on all platforms.
2013-04-22: Version 3.18.2
OS::MemMove/OS::MemCopy: Don't call through to generated code when size
== 0 to avoid prefetching invalid memory (Chromium issue 233500)
Removed heap snapshot size limit. (Chromium issue 232305)
Performance and stability improvements on all platforms.
2013-04-18: Version 3.18.1
Removed SCons related files and deprecated test suite configurations.
Improved handling of unary plus (issue 2527).
Performance and stability improvements on all platforms.
2013-04-17: Version 3.18.0
Enabled pretenuring of fast literals in high promotion mode.
Removed preparser library; link preparser executable against full V8.
Fixed set-up of intrinsic's 'constructor' properties.
(Chromium issue 229445)
ES6 symbols: extended V8 API to support symbols (issue 2158).
Removed ARM support for VFP2.
Made __proto__ a real JavaScript accessor property.
(issue 1949 and issue 2606)
Performance and stability improvements on all platforms.
2013-04-04: Version 3.17.16
Stack trace API: poison stack frames below the first strict mode frame.
(issue 2564)
Made Isolate::GetHeapStatistics robust against half-initialized
isolates (Chromium issue 2591).
Finished implementation of ES6 symbols aka. private names (issue 2158).
Performance and stability improvements on all platforms.
2013-03-21: Version 3.17.15
Rolled back API changes to maintain compatibility with older
3.17.x versions of V8.
Disable zapping of global handles in release mode.
Always mark the entire valid prefix of the descriptor array.
(Chromium issue 196331)
Use internal memcpy for CopyWords and when copying code.
(Chromium issue 196330)
Performance and stability improvements on all platforms.
2013-03-20: Version 3.17.14
Use internal memcpy when initializing code objects.
(Chromium issue 196330)
Disabled weak embedded maps because of crashes.
(Chromium issues 172489, 217858)
Performance and stability improvements on all platforms.
2013-03-19: Version 3.17.13
Turned Flags into a uint32_t typedef (Chromium issue 194749).
Performance and stability improvements on all platforms.
2013-03-18: Version 3.17.12
Unified kMaxArguments with number of bits used to encode it.
(Chromium issue 211741)
Fixed detection of |handle_smi| case in
HOptimizedGraphBuilder::HandlePolymorphicCallNamed.
(Chromium issue 196583)
Performance and stability improvements on all platforms.
2013-03-15: Version 3.17.11
Added a version of the v8::HandleScope constructor with an v8::Isolate
parameter and made AdjustAmountOfExternalAllocatedMemory an instance
method of v8::Isolate.
(issue 2487)
Fixed two register allocator bugs (off-by-one error/failure
propagation). (issue 2576)
Fixed huge heap snapshot when a heavily shared context has many
variables. (Chromium issue 145687)
Performance and stability improvements on all platforms.
2013-03-13: Version 3.17.10
Fixed heap snapshot creation for Harmony collections. (issue 2535)
Fixed register allocation corner case. (Chromium issue 177883)
Performance and stability improvements on all platforms.
2013-03-08: Version 3.17.9
Restored Function()'s expected string representation. (issue 2470)
Enabled deprecatations (again). (issue 2487)
Avoid bool to Oddball conversions by being lazy. (issue 2491)
Added %p option to --logfile.
Hardened Function()'s parsing of function literals. (issue 2470)
ES6 symbols: Refine test for getOwnPropertyNames. (issue 2158)
Performance and stability improvements on all platforms.
2013-03-07: Version 3.17.8
Added missing license headers. (Chromium issue 98597)
Inserted missing type cast in JSON.stringify. (issue 2570)
Reverted "Send SIGPROF signals on the profiler event processor thread"
(issue 2571)
Fixed Array.length, String.length and Function.prototype LoadICs on x64.
(issue 2568)
ES6 symbols: filter symbols form for-in loops and Object.keys.
(issue 2158)
Properly handle misses for StoreArrayLengthStub on ia32 and x64
(issue 2566)
Fixed x32 handling of Atomic64. (Chromium issue chromium-os:36866)
Removed "library" variable from standalone.gypi. (Chromium issue 111541)
Fixed HCheckSmiOrInt <-> HBoundsCheck interaction wrt. representations.
(issue 2556)
Enabled zapping of disposed global handles in release mode.
(Chromium issue 176056)
Added workaround for redefinition of __proto__ property. (issue 2565)
ES6 symbols: Allow symbols as property names. (issue 2158)
Performance and stability improvements on all platforms.
2013-03-04: Version 3.17.7
Limited recursion in regexp compilation by a budget.
(Chromium issue 178790)
ES6 symbols: Implemented Symbol intrinsic and basic functionality
(issue 2158)
Performance and stability improvements on all platforms.
2013-02-28: Version 3.17.6
Fixed materialization of arguments objects with unknown values.
(Chromium issue 163530)
Set default number of sweeper threads to at most four.
Performance and stability improvements on all platforms.
2013-02-27: Version 3.17.5
Made __proto__ a foreign callback on Object.prototype.
(issue 621, issue 1949 and issue 2441)
Performance and stability improvements on all platforms.
2013-02-25: Version 3.17.4
Performance and stability improvements on all platforms.
2013-02-21: Version 3.17.3
Performance and stability improvements on all platforms.
2013-02-19: Version 3.17.2
Removed bogus check for TOP register in deoptimizer.
(Chromium issue 176943)
Made the Isolate parameter mandatory for internal HandleScopes.
(issue 2487)
Fixed f.apply() optimization when declared arguments are mutated.
(issue 2539)
Performance and stability improvements on all platforms.
2013-02-14: Version 3.17.1
Performance and stability improvements on all platforms.
2013-02-13: Version 3.17.0
Enabled parallel sweeping.
Don't try to unlink instructions twice during GVN
(Chromium issue 175141)
Fixed code flusher disabling while marking incrementally.
(Chromium issue 173458, 168582)
Don't use TLS for space iterators.
(issue 2531)
Added new GetHeapStatistics API entry and deprecated old one.
Fixed DoubleStackSlot-to-DoubleStackSlot moves on ia32. Unified
platform-independent code.
(Chromium issue 173907)
Added --trace-array-abuse to help find OOB accesses.
Performance and stability improvements on all platforms.
2013-02-06: Version 3.16.14
Performance and stability improvements on all platforms.
2013-02-04: Version 3.16.13
Tagged stubs that rely on instance types as MEGAMORPHIC.
(Chromium issue 173974)
Fixed clearing of dead dependent codes and verifing of weak
embedded maps on full GC. (Chromium issue 172488,172489)
Made the arm port build cleanly with Clang.
Performance and stability improvements on all platforms.
2013-01-31: Version 3.16.12
Performance and stability improvements on all platforms.
2013-01-30: Version 3.16.11
Put making embedded maps in optimized code weak behind a flag.
(Chromium issue 172488,172489)
Performance and stability improvements on all platforms.
2013-01-25: Version 3.16.10
Avoid excessive memory usage during redundant phi elimination.
(issue 2510)
Fixed additional spec violations wrt RegExp.lastIndex.
(issue 2437)
Added Isolate parameter to Persistent class.
(issue 2487)
Performance and stability improvements on all platforms.
2013-01-24: Version 3.16.9
Made embedded maps in optimized code weak.
(issue 2073)
Fixed corner case when JSFunction is evicted from flusher.
(Chromium issue 168801)
Correctly set kCanBeDivByZero flag for HMathFloorOfDiv.
(Chromium issue 171641)
Performance and stability improvements on all platforms.
2013-01-23: Version 3.16.8
Correctly reset lastIndex in an RegExp object.
(Chromium issue 170856)
Added a workaround for Windows compilation problems related to V8EXPORT.
(issue 2507)
tools/run-tests.py: shlex.split() the value of --command-prefix
(Chromium issue 171553)
Fixed pattern detection for replacing shifts by rotation.
(Chromium issue 2499)
Performance and stability improvements on all platforms.
2013-01-21: Version 3.16.7
Removed <(library) usage from v8.gyp.
(Chromium issue 111541)
Fixed out of bounds memory access in TestJSArrayForAllocationSiteInfo.
(Chromium issue 169928)
Performance and stability improvements on all platforms.
2013-01-18: Version 3.16.6
Made the Isolate parameter mandatory in Locker and Unlocker classes.
(issue 2487)
Avoid pointer underflow in CopyCharsUnsigned.
(issue 2493)
Generate shim headers when using system v8.
(Chromium issue 165264)
Fixed arguments materialization for inlined apply().
(issue 2489)
Sync'ed laziness between BuildFunctionInfo and MakeFunctionInfo.
(Chromium issue 147497)
Added sanity check to CodeFlusher::AddCandidate.
(Chromium issue 169209)
Performance and stability improvements on all platforms.
2013-01-15: Version 3.16.5
Removed deprecated functions from V8's external API.
Prepared API for WebKit use of Latin-1.
Fixed V8 issue 2486.
Fixed Chromium issue 169723.
Performance and stability improvements on all platforms.
2013-01-11: Version 3.16.4
Fixed Chromium issues 168545 and 169209.
Performance and stability improvements on all platforms.
2013-01-09: Version 3.16.3
Improved GC performance when moving parts of a FixedArray (issue 2452).
Enabled readline on d8 while building a shared lib (issue 1781).
Fixed missing exception check in typed array constructor
(Chromium issue 168545).
Check for read-only-ness when preparing for array sort (issue 2419).
Performance and stability improvements on all platforms.
2013-01-04: Version 3.16.2
Added Makefile options to build for the Raspberry Pi (armv7=0,
arm_fpu=vfp2).
Performance and stability improvements on all platforms.
2012-12-27: Version 3.16.1
Fixed x64 MathMinMax for negative untagged int32 arguments.
(Chromium issue 164442)
Fixed FloatingPointHelper::CheckSSE2OperandIsInt32.
(issue 2458)
Performance and stability improvements on all platforms.
2012-12-21: Version 3.16.0
V8_Fatal now prints C++ stack trace in debug mode.
Added HTML-based tick processor.
Continued implementation of Object.observe (V8 issue 2409).
Fixed V8 issues 2243, 2340, 2393, 2399, 2457.
Fixed Chromium issues 125308, 165637, 166379, 166553.
Performance and stability improvements on all platforms.
2012-12-10: Version 3.15.11
Define CAN_USE_VFP2/3_INSTRUCTIONS based on arm_neon and arm_fpu GYP
flags.
Performance and stability improvements on all platforms.
2012-12-07: Version 3.15.10
Enabled optimisation of functions inside eval. (issue 2315)
Fixed spec violations in methods of Number.prototype. (issue 2443)
Added GCTracer metrics for a scavenger GC for DOM wrappers.
Performance and stability improvements on all platforms.
2012-12-06: Version 3.15.9
Fixed candidate eviction in code flusher.
(Chromium issue 159140)
Iterate through all arguments for side effects in Math.min/max.
(issue 2444)
Fixed spec violations related to regexp.lastIndex
(issue 2437, issue 2438)
Performance and stability improvements on all platforms.
2012-12-04: Version 3.15.8
Enforced stack allocation of TryCatch blocks.
(issue 2166,chromium:152389)
Fixed external exceptions in external try-catch handlers.
(issue 2166)
Activated incremental code flushing by default.
Performance and stability improvements on all platforms.
2012-11-30: Version 3.15.7
Activated code aging by default.
Included more information in --prof log.
Removed eager sweeping for lazy swept spaces. Try to find in
SlowAllocateRaw a bounded number of times a big enough memory slot.
(issue 2194)
Performance and stability improvements on all platforms.
2012-11-26: Version 3.15.6
Ensure double arrays are filled with holes when extended from
variations of empty arrays. (Chromium issue 162085)
Performance and stability improvements on all platforms.
2012-11-23: Version 3.15.5
Fixed JSON.stringify for objects with interceptor handlers.
(Chromium issue 161028)
Fixed corner case in x64 compare stubs. (issue 2416)
Performance and stability improvements on all platforms.
2012-11-16: Version 3.15.4
Fixed Array.prototype.join evaluation order. (issue 2263)
Perform CPU sampling by CPU sampling thread only iff processing thread
is not running. (issue 2364)
When using an Object as a set in Object.getOwnPropertyNames, null out
the proto. (issue 2410)
Disabled EXTRA_CHECKS in Release build.
Heap explorer: Show representation of strings.
Removed 'type' and 'arguments' properties from Error object.
(issue 2397)
Added atomics implementation for ThreadSanitizer v2.
(Chromium issue 128314)
Fixed LiveEdit crashes when object/array literal is added. (issue 2368)
Performance and stability improvements on all platforms.
2012-11-13: Version 3.15.3
Changed sample shell to send non-JS output (e.g. errors) to stderr
instead of stdout.
Correctly check for stack overflow even when interrupt is pending.
(issue 214)
Collect stack trace on stack overflow. (issue 2394)
Performance and stability improvements on all platforms.
2012-11-12: Version 3.15.2
Function::GetScriptOrigin supplies sourceURL when script name is
not available. (Chromium issue 159413)
Made formatting error message side-effect-free. (issue 2398)
Fixed length check in JSON.stringify. (Chromium issue 160010)
ES6: Added support for Set and Map clear method (issue 2400)
Fixed slack tracking when instance prototype changes.
(Chromium issue 157019)
Fixed disabling of code flusher while marking. (Chromium issue 159140)
Added a test case for object grouping in a scavenger GC (issue 2077)
Support shared library build of Android for v8.
(Chromium issue 158821)
ES6: Added support for size to Set and Map (issue 2395)
Performance and stability improvements on all platforms.
2012-11-06: Version 3.15.1
Put incremental code flushing behind a flag. (Chromium issue 159140)
Performance and stability improvements on all platforms.
2012-10-31: Version 3.15.0
Loosened aligned code target requirement on ARM (issue 2380)
Fixed JSON.parse to treat leading zeros correctly.
(Chromium issue 158185)
Performance and stability improvements on all platforms.
2012-10-22: Version 3.14.5
Killed off the SCons based build.
Added a faster API for creating v8::Integer objects.
Speeded up function deoptimization by avoiding quadratic pass over
optimized function list. (Chromium issue 155270)
Always invoke the default Array.sort functions from builtin functions.
(issue 2372)
Reverted recent CPU profiler changes because they broke --prof.
(issue 2364)
Switched code flushing to use different JSFunction field.
(issue 1609)
Performance and stability improvements on all platforms.
2012-10-15: Version 3.14.4
Allow evals for debugger even if they are prohibited in the debugee
context. (Chromium issue 154733)
Enabled --verify-heap in release mode (issue 2120)
Performance and stability improvements on all platforms.
2012-10-11: Version 3.14.3
Use native context to retrieve ErrorMessageForCodeGenerationFromStrings
(Chromium issue 155076).
Bumped variable limit further to 2^17 (Chromium issue 151625).
Performance and stability improvements on all platforms.
2012-10-10: Version 3.14.2
ARM: allowed VFP3 instructions when hardfloat is enabled.
(Chromium issue 152506)
Fixed instance_descriptors() and PushStackTraceAndDie regressions.
(Chromium issue 151749)
Made GDBJIT interface compile again. (issue 1804)
Fixed Accessors::FunctionGetPrototype's proto chain traversal.
(Chromium issue 143967)
Made sure that names of temporaries do not clash with real variables.
(issue 2322)
Rejected local module declarations. (Chromium issue 150628)
Rejected uses of lexical for-loop variable on the RHS. (issue 2322)
Fixed slot recording of code target patches.
(Chromium issue 152615,chromium:144230)
Changed the Android makefile to use GCC 4.6 instead of GCC 4.4.3.
Performance and stability improvements on all platforms.
2012-10-01: Version 3.14.1
Don't set -m32 flag when compiling with Android ARM compiler.
(Chromium issue 143889)
Restore the descriptor array before returning allocation failure.
(Chromium issue 151750)
Lowered kMaxVirtualRegisters (v8 issue 2139, Chromium issues 123822 and
128252).
Pull more recent gyp in 'make dependencies'.
Made sure that the generic KeyedStoreIC changes length and element_kind
atomically (issue 2346).
Bumped number of allowed variables per scope to 65535, to address GWT.
(Chromium issue 151625)
Support sourceURL for dynamically inserted scripts (issue 2342).
Performance and stability improvements on all platforms.
2012-09-20: Version 3.14.0
Fixed missing slot recording during clearing of CallICs.
(Chromium issue 144230)
Fixed LBoundsCheck on x64 to handle (stack slot + constant) correctly.
(Chromium issue 150729)
Fixed minus zero test. (Issue 2133)
Fixed setting array length to zero for slow elements.
(Chromium issue 146910)
Fixed lost arguments dropping in HLeaveInlined.
(Chromium issue 150545)
Fixed casting error for receiver of interceptors.
(Chromium issue 149912)
Throw a more descriptive exception when blocking 'eval' via CSP.
(Chromium issue 140191)
Fixed debugger's eval when close to stack overflow. (issue 2318)
Added checks to live edit. (issue 2297)
Switched on code compaction on incremental GCs.
Fixed caching of optimized code for OSR. (issue 2326)
Not mask exception thrown by toString in String::UtfValue etc.
(issue 2317)
Fixed API check for length of external arrays. (Chromium issue 148896)
Ensure correct enumeration indices in the dict (Chromium issue 148376)
Correctly initialize regexp global cache. (Chromium issue 148378)
Fixed arguments object materialization during deopt. (issue 2261)
Introduced new API to expose external string resource regardless of
encoding.
Fixed CHECK failure in LCodeGen::DoWrapReceiver when
--deopt-every-n-times flag is present
(Chromium issue 148389)
Fixed edge case of extension with NULL as source string.
(Chromium issue 144649)
Fixed array index dehoisting. (Chromium issue 141395)
Performance and stability improvements on all platforms.
2012-09-11: Version 3.13.7
Enable/disable LiveEdit using the (C++) debug API.
Performance and stability improvements on all platforms.
2012-09-06: Version 3.13.6
Added validity checking to API functions and calls.
Disabled accessor inlining (Chromium issue 134609).