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. 


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2106 to try to isolate a performance regression on the
page cyclers.

I'll roll the changes back in if this doesn't fix the
regression.

TBR=antonm@chromium.org
Review URL: http://codereview.chromium.org/118302

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Change stack alignment on linux to 16 bytes to keep gcc 4.4 happy. 
This fixes the mksnapshot segfault without requiring -fno-tree-vectorize
which just avoided the problem by not generating code with movdqa.


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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

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indentation.

Review URL: http://codereview.chromium.org/118234

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Review URL: http://codereview.chromium.org/118115


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Review URL: http://codereview.chromium.org/119171

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Review URL: http://codereview.chromium.org/119082

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Review URL: http://codereview.chromium.org/118229


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Review URL: http://codereview.chromium.org/119112

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Review URL: http://codereview.chromium.org/118163

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Review URL: http://codereview.chromium.org/119078

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Review URL: http://codereview.chromium.org/119081

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into the ecx register and to ensure that there is no frame effect
between the first entry to the deferred code and binding its exit.
Review URL: http://codereview.chromium.org/118157

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external strings so that they are not disposed when running other
tests that rely on only one external string being disposed during its
run.

TBR=kasperl
Review URL: http://codereview.chromium.org/118158

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immediately if holder has this property or saves binary search on holder if
property doesn't belong to holder.  Of course, in the cases when named getter
returns nothing.

That gives ~20% for dom benchmark/Document Object String Get, speeds up overall
dom_perf (not dramatically) and overall score for peacekeeper.  Strange, but DOM
part of peacekeepr runs somewhat slower.
Review URL: http://codereview.chromium.org/118118

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Review URL: http://codereview.chromium.org/119076


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Removed duplicates comments in assembler-x64.cc.

Review URL: http://codereview.chromium.org/119035


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DeferredInlineBinaryOperation::GenerateInlineCode and remove its
definition.  It was only called from one site and was the only
deferred code object that was split that way into fast-case inline and
slow-case stub.

Review URL: http://codereview.chromium.org/119037

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Review URL: http://codereview.chromium.org/113997

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Review URL: http://codereview.chromium.org/118107

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mod so they do not share code with the other binary operations.  They
now preallocate their fixed registers (eax and edx).  There is now no
frame effect between entries to the deferred call to the stub.

Review URL: http://codereview.chromium.org/118110

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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


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Review URL: http://codereview.chromium.org/115920


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GCC version.

BUG=364
TBR=sgjesse@chromium.org
Review URL: http://codereview.chromium.org/118016

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Also, add a small delay to be sure that all ticks are logged prior to leaving CheckThatProfilerWorks function.

Review URL: http://codereview.chromium.org/114062


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Review URL: http://codereview.chromium.org/115860

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Review URL: http://codereview.chromium.org/113994

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While testing ProfLazyMode stability I encountered a situation when the cycle supposed to run for 200 ms started to run "infinitely" because delta between two int64_t values became negative.

Review URL: http://codereview.chromium.org/115918


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Thanks to Tobias Kaes, an issue with default copy constructor and assignment operator is found and fixed.

BUG=http://code.google.com/p/v8/issues/detail?id=358

Review URL: http://codereview.chromium.org/113992


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Review URL: http://codereview.chromium.org/112066

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TBR=erik.corry@gmail.com
Review URL: http://codereview.chromium.org/115917

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Change the handling of the debug break stack guard. The debug break is no longer ignored when hit inside "system" JavaScript. The reason for this is twofold:

* 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

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Two simple profiler changes: 1) log sampling rate, 2) check current state before pausing & resuming.

Review URL: http://codereview.chromium.org/113961


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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


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before performing debugger property lookup make sure the current context is set to the context active before the debugger was entered.

Make the use of the LookupResult GC safe in debugger property lookup.
Review URL: http://codereview.chromium.org/115855

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Review URL: http://codereview.chromium.org/115857

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Review URL: http://codereview.chromium.org/115816

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I suggest that the lack of initialization causes issue 358 to happen. In Profiler::Disengage an empty TickSample is inserted in order to wake up the Profiler thread. Issue reporter claims that crash happens in LogTickEvent function. My guess is that frames_couint receives a wild value.

Review URL: http://codereview.chromium.org/113939


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