Two techniques are involved:
- compress repeated line ends (common stack beginnings) by using back references;
- do RLE compression of repeated tick events.
This gives only 5% size reduction on benchmarks run, but this is because tick events are only comprise 10% of file size. Under Chromium winnings are bigger because long repeated samples of idleness are now compressed into a single line.
Tickprocessor will be updated in the next patch.
Review URL: http://codereview.chromium.org/123012
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2147 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
interceptors and dont-delete attributes.
Minor change to the behavior of eval: throw exception when calling
eval in a context for which the global has been detached. This
matches the behavior of both Firefox and Safari post navigation in the
browser.
Review URL: http://codereview.chromium.org/118374
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2118 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
submitted in revisions 2093, 2094, 2099, and 2106.
There's no evidence that supports that these changes
should be the cause of the unexplained performance
regressions on the intl2 and DHTML page cyclers.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2109 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The problem was I incorrectly treated NULL result as failure to fetch
a property with a getter. However, if getter returns zero, it is
manifested as NULL pointer (see added test case).
Good news: that gives another boost as before this CL if getter returned
0, I did another slow lookup.
Review URL: http://codereview.chromium.org/119172
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2106 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
My assumption that log initialization happens somewhere near the stack's bottom is true for V8's sample shell but isn't true for Chromium, causing many otherwise valid stack addresses to be thrown out. The solution proposed is to save stack pointer value for the outermost JS function in ThreadLocalTop similar to c_entry_fp.
Implemented only for IA-32. Currently I'm not dealing with profiling on ARM and x86-64 anyway.
Review URL: http://codereview.chromium.org/112082
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2086 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
* Running "system" JavaScript with the debug break flag active leads to slow running code while waiting for the break in non "system" JavaScript (one exception to this it is to try to avoid breaks in the clear mirror cache JavaScript code called when leaving the debugger).
* If this happens while processing RegExp running in native code an infinite loop is created as the stack guard handler for RegExp does not move execution forward
Fixed a GC bug in the interrupt handling for RegExp running in native code.
Added test of debug break while in debug message handler callback and debug break while executing a RegExp.
Review URL: http://codereview.chromium.org/115262
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2074 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When profiler's memory buffer is filled up, profiling is stopped and it is ensured that the last record in the buffer is "profiler,\"pause\"" thus making the end of profiling session explicit. Otherwise DevTools Profiler would need to guess whether the current profiling session has been stopped.
Tested with Chromium.
Review URL: http://codereview.chromium.org/115859
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2072 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The goal of this change is to allow longer profiling sessions and preserve memory when profiler isn't started. The buffer starts with 64K and grows until it reaches the upper limit, which is currently set to 50MB --- according to my evaluations, this is enough for at least 20 minutes of GMail profiling. As we're planning to introduce compression for the profiler log, this time boundary will be significantly increased soon.
To make possible unit testing of the new component, I've factored out Logger's utility classes into a separate source file: log-utils.h/cc. Log and LogMessageBuilder are moved there from log.cc without any semantical changes.
Review URL: http://codereview.chromium.org/115814
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2067 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This issue was raised by Brett Wilson while reviewing my changelist for readability. Craig Silverstein (one of C++ SG maintainers) confirmed that we should declare one namespace per line. Our way of namespaces closing seems not violating style guides (there is no clear agreement on it), so I left it intact.
Review URL: http://codereview.chromium.org/115756
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2038 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This is intended to be used with Chromium. When in resource-saving mode, profiler doesn't consume any resources (sampler and logging is off) until resumed. Then again, when profiler is paused, sampling and logging are turned off.
Tested under Linux and Windows. Also have done preliminary testing with Chromium.
Review URL: http://codereview.chromium.org/113762
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Without the change the debugger may crash as Debugger::EventActive(v8::Break) called from OnDebugBreak may clear current debugger context.
Also when compilation cache was enabled debugger could fail on second attach for the same reason(see AfterCompileMessageWhenMessageHandlerIsReset).
BUG=12404
Review URL: http://codereview.chromium.org/115709
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2035 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
If was failing because with snapshot the range between minimum and maximum addresses of heap objects is very large (close to 0xf0000000). To fix this I rewrote handling of address maps in the test.
Submitting with TBR because of late time. I think, we'll need to revisit this change tomorrow.
TBR=sgjesse@chromium.org
Review URL: http://codereview.chromium.org/113641
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The goal is to make possible having --prof flag always enabled in Chromium. Currently we can't do this because --prof causes compiler and gc to log code creations / moves / deletes which aren't needed until we start profiling. With LogCompiledFunctions it will be possible not to log anything until we start profiling. When started, the current map of compiled functions will be logged and compiler / gc logging will be enabled to update current state. When profling is stopped, logging will be turned off again.
Funny that testing code is actually much longer and complex than function code.
Review URL: http://codereview.chromium.org/112036
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2009 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When loaded scripts are requested this cache is filled with all the script objects in the heap. Hereafter its content is kept in sync with the active scripts in the heap through the notifications of new scripts compiled and by using weak handles to get notified when a script is collected.
Through the tracking of collected scripts the debugger event OnScriptCollected have been added to notify a debugger that a script previously returned through the scripts command is no longer in use.
Make the ComputeIntegerHash globally available.
Moved clearing of the mirror cache to when debugger is really left. Previously recursive invocations of the debugger cause the mirror cache to be cleared causing handles to become either stale or reference other objects.
Review URL: http://codereview.chromium.org/115462
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1988 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This will enable reading profiler log in Chrome. The current implementation of memory buffer is trivial (fixed size buffer, no memory recycling) but enough to start end-to-end DevTools Profiler implementation. Later it will be enhanced.
Review URL: http://codereview.chromium.org/108011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
- TARGET, the architecture we will generate code for.
This is brought it from the build system.
- HOST, the architecture our C++ compiler is building for.
This is detected automatically based on compiler defines.
This adds macros for 32 or 64 bit, and cleans up some
include conditionals, etc.
Review URL: http://codereview.chromium.org/99355
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1864 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
NPN_Construct allows a NPObject to be called as a construct. For example, the
test case
var s = new app.Packages.java.lang.Integer(5);
app.Packages.java.lang.Integer is a NPObject, and it implements NPN_Construct.
This fix allows a JSObject created by an API function be called as a construct
if it can be called
as a function. This is done by generating the same code for
var s = new app.Packages.java.lang.Integer(5); as
var s = app.Packages.java.lang.Integer(5);
and the caller handles both case correctly. A more sophiscated fix is to one
extra JSConstructCall
frame and allow CallAsConstructor in Builtin::HandleApiCallAsFunction.
This change itself shouldn't affect the semantic of normal case such as:
var a = {};
var s = new a();
A TypeError exception will be thrown in CALL_NON_FUNCTION (runtime.js).
Another part of fix is in the binding code, V8NPObject, which makes
NPN_InvokeDefault or NPN_Construct
call depending on which function is available.
Review URL: http://codereview.chromium.org/100243
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1837 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The current version is now held in src/version.cc in a number of defines which needs to be modified when changing version.
The following defines make up the version information:
MAJOR_VERSION
MINOR_VERSION
BUILD_NUMBER
PATCH_LEVEL
CANDIDATE_VERSION
The first four are numbers and the fifth is a boolean. Besides these five the define
SONAME
can be used to set a specific soname when building the a shared library (see below). This will most likely be used on stable branches where binary compatibility is ensured between different versions. This define is a string.
This version information is now read by the SCons build to support setting the soname for a Linux shared library. This requires passing the option soname=on to the SCons build.
When soname=on is specified the soname for the shared library can be set in two different ways. Either it will be the full versioned library name (e.g. libv8-1.2.2.so) or a specific soname defined in src/version.cc. Whenever a shared library is build with an soname the filename of the library will hold the full version name (e.g. libv8-1.2.2.so).
I did not update the xcode project with the new files.
BUG=151
Review URL: http://codereview.chromium.org/100104
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1826 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The object delivered to the debug message handler contains additional information on the current break handling the messages.
Clients which require just JSON message parsing can simply get the JSON using the GetJSON message on the message object to still have the previous behaviour.
NewMessageHangler(const v8::Debug::Message& message) {
v8::String::Value val(message.GetJSON());
OldMessageHandler(Vector<uint16_t>(const_cast<uint16_t*>(*val), val.length()));
}
Refactored some of the debugger code to use internal handles instead of API handles. Also changed Object to JSObject is some places.
The access to the active context when the break occurred is still not implemented. I will add this in a new CL, as this one is quite big already.
Review URL: http://codereview.chromium.org/99122
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1811 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The debug message thread was introduced to make it possible to have the message handler callback be called from a different thread than the thread running V8 where the debug event occoured, but it never had any practical use, and prevents providing information to the message handler which is only available from the V8 thread.
In the future any thread decoupling will have do be done by the embedder.
This also removes the queue used for outbound messages.
Renamed the class Message to CommandMessage as it is only used for debugger commands from the client. Related message queue classes has also been renamed.
Review URL: http://codereview.chromium.org/93118
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1788 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
stack pointer to change by more than one in a corner case. If we push
a constant smi larger than 16 bits, we push it via a temporary
register. Allocating the temporary can cause a register to be spilled
from the frame somewhere above the stack pointer.
As a fix, do not use pushes to materialize ranges of elements of size
larger than one.
Review URL: http://codereview.chromium.org/92121
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1785 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
For keyed IC loads setting a break point now ensures that the inlined code is not used. When the break point is set the inlined map check is changed to fail causing the inlined code not to be used but the IC to be called. As long at the break point is set the map check will stay invalid.
Review URL: http://codereview.chromium.org/87025
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1756 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
numerical order independently of the representation of the object.
Exchanged the order of enumeration of integer and string keys so
integer keys are first instead of string keys to better match
WebKit/JSC behavior.
Added test cases that document our enumeration order choice.
Review URL: http://codereview.chromium.org/75035
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1722 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Currently function name inference is wired with AST optimization pass to avoid introducing another pass over AST. A better solution would be to rewrite AST visitors so they can be naturally combined together in a single pass, as their current implementation doesn't allow it.
For examples of cases where function names can be inferred, see the tests file.
Review URL: http://codereview.chromium.org/62146
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1696 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
- Added special cutouts if a Vector has NULL data, which will now happen
if an external string's resource has been deleted.
- Added an verification phase before old gen GC to verify that all real
entries in the SymbolTable are valid symbols.
- Added test that verifies the correct behaviour of the workaround.
Review URL: http://codereview.chromium.org/66011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1689 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
