https://bugs.webkit.org/show_bug.cgi?id=66747

Reviewed by Geoffrey Garen.

Added facilities for the JIT to specify the kind of write barrier
being executed.  Added code for profiling the number of each kind
of barrier encountered.

* GNUmakefile.list.am:
* JavaScriptCore.exp:
* JavaScriptCore.pro:
* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
* JavaScriptCore.xcodeproj/project.pbxproj:
* dfg/DFGJITCodeGenerator.cpp:
(JSC::DFG::JITCodeGenerator::writeBarrier):
(JSC::DFG::JITCodeGenerator::cachedPutById):
* dfg/DFGJITCodeGenerator.h:
* dfg/DFGJITCompiler.cpp:
(JSC::DFG::JITCompiler::emitCount):
* dfg/DFGJITCompiler.h:
(JSC::DFG::JITCompiler::emitCount):
* dfg/DFGNonSpeculativeJIT.cpp:
(JSC::DFG::NonSpeculativeJIT::compile):
* dfg/DFGRepatch.cpp:
(JSC::DFG::tryCachePutByID):
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* heap/Heap.h:
(JSC::Heap::writeBarrier):
* heap/WriteBarrierSupport.cpp: Added.
(JSC::WriteBarrierCounters::initialize):
* heap/WriteBarrierSupport.h: Added.
(JSC::WriteBarrierCounters::WriteBarrierCounters):
(JSC::WriteBarrierCounters::jitCounterFor):
(JSC::WriteBarrierCounters::countWriteBarrier):
* jit/JIT.h:
* jit/JITPropertyAccess.cpp:
(JSC::JIT::emit_op_put_by_id):
(JSC::JIT::privateCompilePutByIdTransition):
(JSC::JIT::emit_op_put_scoped_var):
(JSC::JIT::emit_op_put_global_var):
(JSC::JIT::emitWriteBarrier):
* jit/JITPropertyAccess32_64.cpp:
(JSC::JIT::emit_op_put_by_val):
(JSC::JIT::emit_op_put_by_id):
(JSC::JIT::privateCompilePutByIdTransition):
(JSC::JIT::emit_op_put_scoped_var):
(JSC::JIT::emit_op_put_global_var):
(JSC::JIT::emitWriteBarrier):
* runtime/InitializeThreading.cpp:
(JSC::initializeThreadingOnce):
* runtime/WriteBarrier.h:
(JSC::WriteBarrierBase::setWithoutWriteBarrier):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@93698 268f45cc-cd09-0410-ab3c-d52691b4dbfc