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2009-06-23: Version 1.1.10.14
Fixed two bugs in the regular expression engine. 2009-05-18: Version 1.1.10.13 Added multiple generations to the script compilation cache to allow scripts that are used alot to survive a number of garbage collections in the compilation cache. 2009-05-15: Version 1.1.10.12 Fixed http://crbug.com/12054. Fix numeric overflow handling when compiling count operations in CodeGenerator::VisitCountOperation. 2009-04-15: Version 1.1.10 Fixed crash bug that occurred when loading a const variable in the presence of eval. Allowed using with and eval in registered extensions in debug mode by fixing bogus assert. Fixed the source position for function returns to enable the debugger to break there. 2009-04-14: Version 1.1.9 Made the stack traversal code in the profiler robust by avoiding to look into the heap. Added name inferencing for anonymous functions to facilitate debugging and profiling. Re-enabled stats timers in the developer shell (d8). Fixed issue 303 by avoiding to shortcut cons-symbols. 2009-04-11: Version 1.1.8 Changed test-debug/ThreadedDebugging to be non-flaky (issue 96). Fixed step-in handling for Function.prototype.apply and call in the debugger (issue 269). Fixed v8::Object::DeleteHiddenValue to not bail out when there are no hidden properties. Added workaround for crash bug, where external symbol table entries with deleted resources would lead to NPEs when looking up in the symbol table. 2009-04-07: Version 1.1.7 Added support for easily importing additional environment variables into the SCons build. Optimized strict equality checks. Fixed crash in indexed setters on objects without a corresponding getter (issue 298). Re-enabled script compilation cache. 2009-04-01: Version 1.1.6 Reverted an unsafe code generator change. 2009-04-01: Version 1.1.5 Fixed bug that caused function literals to not be optimized as much as other functions. Improved profiler support. Fixed a crash bug in connection with debugger unloading. Fixed a crash bug in the code generator caused by losing the information that a frame element was copied. Fixed an exception propagation bug that could cause non-null return values when exceptions were thrown. 2009-03-30: Version 1.1.4 Optimized String.prototype.match. Improved the stack information in profiles. Fixed bug in ARM port making it possible to compile the runtime system for thumb mode again. Implemented a number of optimizations in the code generator. Fixed a number of memory leaks in tests. Fixed crash bug in connection with script source code and external strings. 2009-03-24: Version 1.1.3 Fixed assertion failures in compilation of loop conditions. Removed STL dependency from developer shell (d8). Added infrastructure for protecting the V8 heap from corruption caused by memory modifications from the outside. 2009-03-24: Version 1.1.2 Improved frame merge code generated by the code generator. Optimized String.prototype.replace. Implemented __defineGetter__ and __defineSetter__ for properties with integer keys on non-array objects. Improved debugger and profiler support. Fixed a number of portability issues to allow compilation for smaller ARM devices. Exposed object cloning through the API. Implemented hidden properties. This is used to expose an identity hash for objects through the API. Implemented restarting of regular expressions if their input string changes representation during preemption. Fixed a code generator bug that could cause assignments in loops to be ignored if using continue to break out of the loop (issue 284). 2009-03-12: Version 1.1.1 Fixed an assertion in the new compiler to take stack overflow exceptions into account. Removed exception propagation code that could cause crashes. Fixed minor bug in debugger line number computations. 8-byte align the C stack on Linux and Windows to speed up floating point computations. 2009-03-12: Version 1.1.0 Improved code generation infrastructure by doing simple register allocation and constant folding and propagation. Optimized regular expression matching by avoiding to create intermediate string arrays and by flattening nested array representations of RegExp data. Traverse a few stack frames when recording profiler samples to include partial call graphs in the profiling output. Added support for using OProfile to profile generated code. Added remote debugging support to the D8 developer shell. Optimized creation of nested literals like JSON objects. Fixed a bug in garbage collecting unused maps and turned it on by default (--collect-maps). Added support for running tests under Valgrind. 2009-02-27: Version 1.0.3 Optimized double-to-integer conversions in bit operations by using SSE3 instructions if available. Optimized initialization sequences that store to multiple properties of the same object. Changed the D8 debugger frontend to use JSON messages. Force garbage collections when disposing contexts. Align code objects at 32-byte boundaries. 2009-02-25: Version 1.0.2 Improved profiling support by performing simple call stack sampling for ticks and by fixing a bug in the logging of code addresses. Fixed a number of debugger issues. Optimized code that uses eval. Fixed a couple of bugs in the regular expression engine. Reduced the size of generated code for certain regular expressions. Removed JSCRE completely. Fixed issue where test could not be run if there was a dot in the checkout path. 2009-02-13: Version 1.0.1 Fixed two crash-bugs in irregexp (issue 231 and 233). Fixed a number of minor bugs (issue 87, 227 and 228). Added support for morphing strings to external strings on demand to avoid having to create copies in the embedding code. Removed experimental support for external symbol callbacks. 2009-02-09: Version 1.0.0 Fixed crash-bug in the code generation for case independent 16 bit backreferences. Made shells more robust in the presence of string conversion failures (issue 224). Fixed a potential infinite loop when attempting to resolve eval (issue 221). Miscellaneous fixes to the new regular expression engine. Reduced binary by stripping unneeded text from JavaScript library and minifying some JavaScript files. 2009-01-27: Version 0.4.9 Enabled new regular expression engine. Made a number of changes to the debugger protocol. Fixed a number of bugs in the preemption support. Added -p option to the developer shell to run files in parallel using preemption. Fixed a number of minor bugs (including issues 176, 187, 189, 192, 193, 198 and 201). Fixed a number of bugs in the serialization/deserialization support for the ARM platform. 2009-01-19: Version 0.4.8.1 Minor patch to debugger support. 2009-01-16: Version 0.4.8 Fixed string length bug on ARM (issue 171). Made most methods in the API const. Optimized object literals by improving data locality. Fixed bug that caused incomplete functions to be cached in case of stack overflow exceptions. Fixed bugs that caused catch variables and variables introduced by eval to behave incorrectly when using accessors (issues 186, 190 and 191). 2009-01-06: Version 0.4.7 Minor bugfixes and optimizations. Added command line debugger to D8 shell. Fixed subtle bug that caused the wrong 'this' to be used when calling a caught function in a catch clause. Inline array loads within loops directly in the code instead of always calling a stub. 2008-12-11: Version 0.4.6 Fixed exception reporting bug where certain exceptions were incorrectly reported as uncaught. Improved the memory allocation strategy used during compilation to make running out of memory when compiling huge scripts less likely. Optimized String.replace by avoiding the construction of certain sub strings. Fixed bug in code generation for large switch statements on ARM. Fixed bug that caused V8 to change the global object template passed in by the user. Changed the API for creating object groups used during garbage collection. Entire object groups are now passed to V8 instead of individual members of the groups. 2008-12-03: Version 0.4.5 Added experimental API support for allocating V8 symbols as external strings. Fixed bugs in debugging support on ARM. Changed eval implementation to correctly detect whether or not a call to eval is aliased. Fixed bug caused by a combination of the compilation cache and dictionary probing in native code. The bug caused us to sometimes call functions that had not yet been compiled. Added platform support for FreeBSD. Added support for building V8 on Windows with either the shared or static version of MSVCRT Added the v8::jscre namespace around the jscre functions to avoid link errors (duplicate symbols) when building Google Chrome. Added support for calling a JavaScript function with the current debugger execution context as its argument to the debugger interface. Changed the type of names of counters from wchar_t to char. Changed the Windows system call used to compute daylight savings time. The system call that we used to use became four times slower on WinXP SP3. Added support in the d8 developer shell for memory-mapped counters and added a stats-viewer tool. Fixed bug in upper/lower case mappings (issue 149). 2008-11-17: Version 0.4.4 Reduced code size by using shorter instruction encoding when possible. Added a --help option to the shell sample and to the d8 shell. Added visual studio project files for building the ARM simulator. Fixed a number of ARM simulator issues. Fixed bug in out-of-memory handling on ARM. Implemented shell support for passing arguments to a script from the command line. Fixed bug in date code that made certain date functions return -0 instead of 0 for dates before the epoch. Restricted applications of eval so it can only be used in the context of the associated global object. Treat byte-order marks as whitespace characters. 2008-11-04: Version 0.4.3 Added support for API accessors that prohibit overwriting by accessors defined in JavaScript code by using __defineGetter__ and __defineSetter__. Improved handling of conditionals in test status files. Introduced access control in propertyIsEnumerable. Improved performance of some string operations by caching information about the type of the string between operations. Fixed bug in fast-case code for switch statements that only have integer labels. 2008-10-30: Version 0.4.2 Improved performance of Array.prototype.concat by moving the implementation to C++ (issue 123). Fixed heap growth policy to avoid growing old space to its maximum capacity before doing a garbage collection and fixed issue that would lead to artificial out of memory situations (issue 129). Fixed Date.prototype.toLocaleDateString to return the date in the same format as WebKit. Added missing initialization checks to debugger API. Added removing of unused maps during GC. 2008-10-28: Version 0.4.1 Added caching of RegExp data in compilation cache. Added Visual Studio project file for d8 shell. Fixed function call performance regression introduced in version 0.4.0 when splitting the global object in two parts (issue 120). Fixed issue 131 by checking for empty handles before throwing and reporting exceptions. 2008-10-23: Version 0.4.0 Split the global object into two parts: The state holding global object and the global object proxy. Fixed bug that affected the value of an assignment to an element in certain cases (issue 116). Added GetPropertyNames functionality (issue 33) and extra Date functions (issue 77) to the API. Changed WeakReferenceCallback to take a Persistent<Value> instead of a Persistent<Object> (issue 101). Fixed issues with message reporting for exceptions in try-finally blocks (issues 73 and 75). Optimized flattening of strings and string equality checking. Improved Boyer-Moore implementation for faster indexOf operations. Added development shell (d8) which includes counters and completion support. Fixed problem with the receiver passed to functions called from eval (issue 124). 2008-10-16: Version 0.3.5 Improved string hash-code distribution by excluding bit-field bits from the hash-code. Changed string search algorithm used in indexOf from KMP to Boyer-Moore. Improved the generated code for the instanceof operator. Improved performance of slow-case string equality checks by specializing the code based on the string representation. Improve the handling of out-of-memory situations (issue 70). Improved performance of strict equality checks. Improved profiler output to make it easier to see anonymous functions. Improved performance of slow-case keyed loads. Improved property access performance by allocating a number of properties in the front object. Changed the toString behavior on the built-in object constructors to print [native code] instead of the actual source. Some web applications do not like constructors with complex toString results. 2008-10-06: Version 0.3.4 Changed Array.prototype.sort to use quick sort. Fixed code generation issue where leaving a finally block with break or continue would accumulate elements on the expression stack (issue 86). Made sure that the name accessor on functions returns the expected names for builtin JavaScript functions and C++ callback functions. Added fast case code for extending the property storage array of JavaScript objects. Ported switch statement optimizations introduced in version 0.3.3 to the ARM code generator. Allowed GCC to use strict-aliasing rules when compiling. Improved performance of arguments object allocation by taking care of arguments adaptor frames in the generated code. Updated the V8 benchmark suite to version 2. 2008-09-25: Version 0.3.3 Improved handling of relocation information to enable more peep-hole optimizations. Optimized switch statements where all labels are constant small integers. Optimized String.prototype.indexOf for common cases. Fixed more build issues (issue 80). Fixed a couple of profiler issues. Fixed bug where the body of a function created using the Function constructor was not allowed to end with a single-line comment (issue 85). Improved handling of object literals by canonicalizing object literal maps. This will allow JSON objects with the same set of properties to share the same map making inline caching work better for JSON objects. 2008-09-17: Version 0.3.2 Generalized the EvalCache into a CompilationCache and enabled it for scripts too. The current strategy is to retire all entries whenever a mark-sweep collection is started. Fixed bug where switch statements containing only a default case would lead to an unbalanced stack (issue 69). Fixed bug that made access to the function in a named function expression impossible in certain situations (issue 24). Fixed even more build issues. Optimized calling conventions on ARM. The conventions on ARM and IA-32 now match. Removed static initializers for flags and counters. Improved inline caching behavior for uncommon cases where lazily loading Date and RegExp code could force certain code paths go megamorphic. Removed arguments adaption for builtins written in C++. This makes Array.prototype.push and Array.prototype.pop slightly faster. 2008-09-11: Version 0.3.1 Fixed a number of build issues. Fixed problem with missing I-cache flusing on ARM. Changed space layout in memory management by splitting up code space into old data space and code space. Added utf-8 conversion support to the API (issue 57). Optimized repeated calls to eval with the same strings. These repeated calls are common in web applications. Added Xcode project file. Optimized a couple of Array operation. Fixed parser bug by checking for end-of-string when parsing break and continue (issue 35). Fixed problem where asian characters were not categorized as letters. Fixed bug that disallowed calling functions fetched from an array using a string as an array index (issue 32). Fixed bug where the internal field count on object templates were sometimes ignored (issue 54). Added -f option to the shell sample for compatibility with other engines (issue 18). Added source info to TryCatches in the API. Fixed problem where the seed for the random number generator was clipped in a double to unsigned int conversion. Fixed bug where cons string symbols were sometimes converted to non-symbol flat strings during GC. Fixed bug in error reporting when attempting to convert null to an object. 2008-09-04: Version 0.3.0 Added support for running tests on the ARM simulator. Fixed bug in the 'in' operator where negative indices were not treated correctly. Fixed build issues on gcc-4.3.1. Changed Date.prototype.toLocaleTimeString to not print the timezone part of the time. Renamed debug.h to v8-debug.h to reduce the risk of name conflicts with user code. 2008-09-02: Version 0.2.5 Renamed the top level directory 'public' to 'include'. Added 'env' option to the SCons build scripts to support overriding the ENV part of the build environment. This is mostly to support Windows builds in cases where SCons cannot find the correct paths to the Windows SDK, as these paths cannot be passed through shell environment variables. Enabled "Buffer Security Check" on for the Windows SCons build and added the linker option /OPT:ICF as an optimization. Added the V8 benchmark suite to the repository. 2008-09-01: Version 0.2.4 Included mjsunit JavaScript test suite and C++ unit tests. Changed the shell sample to not print the result of executing a script provided on the command line. Fixed issue when building samples on Windows using a shared V8 library. Added visibility option on Linux build which makes the generated library 18% smaller. Changed build system to accept multiple build modes in one build and generate separate objects, libraries and executables for each mode. Removed deferred negation optimization (a * -b => -(a * b)) since this visibly changes operand conversion order. Improved parsing performance by introducing stack guard in preparsing. Without a stack guard preparsing always bails out with stack overflow. Changed shell sample to take flags directly from the command-line. Added API call that implements this. Added load, quit and version functions to the shell sample so it's easier to run benchmarks and tests. Fixed issue with building samples and cctests on 64-bit machines. Fixed bug in the runtime system where the prototype chain was not always searched for a setter when setting a property that does not exist locally. 2008-08-14: Version 0.2.3 Improved performance of garbage collection by moving the function that updates pointers during compacting collection into the updating visitor. This gives the compiler a better chance to inline and avoid a function call per (potential) pointer. Extended the shell sample with a --runtime-flags option. Added Visual Studio project files for the shell.cc and process.cc samples. 2008-08-13: Version 0.2.2 Improved performance of garbage collection by changing the way we use the marking stack in the event of stack overflow during full garbage collection and by changing the way we mark roots. Cleaned up ARM version by removing top of stack caching and by introducing push/pop elimination. Cleaned up the way runtime functions are called to allow runtime calls with no arguments. Changed Windows build options to make sure that exceptions are disabled and that optimization flags are enabled. Added first version of Visual Studio project files. 2008-08-06: Version 0.2.1 Improved performance of unary addition by avoiding runtime calls. Fixed the handling of '>' and '<=' to use right-to-left conversion and left-to-right evaluation as specified by ECMA-262. Fixed a branch elimination bug on the ARM platform where incorrect code was generated because of overly aggressive branch elimination. Improved performance of code that repeatedly assigns the same function to the same property of different objects with the same map. Untangled DEBUG and ENABLE_DISASSEMBLER defines. The disassembler no longer expects DEBUG to be defined. Added platform-nullos.cc to serve as the basis for new platform implementations. 2008-07-30: Version 0.2.0 Changed all text files to have native svn:eol-style. Added a few samples and support for building them. The samples include a simple shell that can be used to benchmark and test V8. Changed V8::GetVersion to return the version as a string. Added source for lazily loaded scripts to snapshots and made serialization non-destructive. Improved ARM support by fixing the write barrier code to use aligned loads and stores and by removing premature locals optimization that relied on broken support for callee-saved registers (removed). Refactored the code for marking live objects during garbage collection and the code for allocating objects in paged spaces. Introduced an abstraction for the map word of a heap- allocated object and changed the memory allocator to allocate executable memory only for spaces that may contain code objects. Moved StringBuilder to utils.h and ScopedLock to platform.h, where they can be used by debugging and logging modules. Added thread-safe message queues for dealing with debugger events. Fixed the source code reported by toString for certain builtin empty functions and made sure that the prototype property of a function is enumerable. Improved performance of converting values to condition flags in generated code. Merged disassembler-{arch} files. 2008-07-28: Version 0.1.4 Added support for storing JavaScript stack traces in a stack allocated buffer to make it visible in shallow core dumps. Controlled by the --preallocate-message-memory flag which is disabled by default. 2008-07-25: Version 0.1.3 Fixed bug in JSObject::GetPropertyAttributePostInterceptor where map transitions would count as properties. Allowed aliased eval invocations by treating them as evals in the global context. This may change in the future. Added support for accessing the last entered context through the API and renamed Context::Current to Context::GetCurrent and Context::GetSecurityContext to Context::GetCurrentSecurityContext. Fixed bug in the debugger that would cause the debugger scripts to be recursively loaded and changed all disabling of interrupts to be block-structured. Made snapshot data read-only to allow it to be more easily shared across multiple users of V8 when linked as a shared library. 2008-07-16: Version 0.1.2 Fixed building on Mac OS X by recognizing i386 and friends as IA-32 platforms. Added propagation of stack overflow exceptions that occur while compiling nested functions. Improved debugger with support for recursive break points and handling of exceptions that occur in the debugger JavaScript code. Renamed GetInternal to GetInternalField and SetInternal to SetInternalField in the API and moved InternalFieldCount and SetInternalFieldCount from FunctionTemplate to ObjectTemplate. 2008-07-09: Version 0.1.1 Fixed bug in stack overflow check code for IA-32 targets where a non-tagged value in register eax was pushed to the stack. Fixed potential quadratic behavior when converting strings to numbers. Fixed bug where the return value from Object::SetProperty could end up being the property holder instead of the written value. Improved debugger support by allowing nested break points and by dealing with stack-overflows when compiling functions before setting break points in them. 2008-07-03: Version 0.1.0 Initial export. |