Add ability to symbolically set and dump JSC VM options.

Add ability to symbolically set and dump JSC VM options.
See comments in runtime/Options.h for details on how the options work.
https://bugs.webkit.org/show_bug.cgi?id=90420

Patch by Mark Lam <mark.lam@apple.com> on 2012-07-03
Reviewed by Filip Pizlo.

* assembler/LinkBuffer.cpp:
(JSC::LinkBuffer::finalizeCodeWithDisassembly):
* assembler/LinkBuffer.h:
(JSC):
* bytecode/CodeBlock.cpp:
(JSC::CodeBlock::shouldOptimizeNow):
* bytecode/CodeBlock.h:
(JSC::CodeBlock::likelyToTakeSlowCase):
(JSC::CodeBlock::couldTakeSlowCase):
(JSC::CodeBlock::likelyToTakeSpecialFastCase):
(JSC::CodeBlock::likelyToTakeDeepestSlowCase):
(JSC::CodeBlock::likelyToTakeAnySlowCase):
(JSC::CodeBlock::jitAfterWarmUp):
(JSC::CodeBlock::jitSoon):
(JSC::CodeBlock::reoptimizationRetryCounter):
(JSC::CodeBlock::countReoptimization):
(JSC::CodeBlock::counterValueForOptimizeAfterWarmUp):
(JSC::CodeBlock::counterValueForOptimizeAfterLongWarmUp):
(JSC::CodeBlock::optimizeSoon):
(JSC::CodeBlock::exitCountThresholdForReoptimization):
(JSC::CodeBlock::exitCountThresholdForReoptimizationFromLoop):
* bytecode/ExecutionCounter.h:
(JSC::ExecutionCounter::clippedThreshold):
* dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::handleInlining):
* dfg/DFGCapabilities.h:
(JSC::DFG::mightCompileEval):
(JSC::DFG::mightCompileProgram):
(JSC::DFG::mightCompileFunctionForCall):
(JSC::DFG::mightCompileFunctionForConstruct):
(JSC::DFG::mightInlineFunctionForCall):
(JSC::DFG::mightInlineFunctionForConstruct):
* dfg/DFGCommon.h:
(JSC::DFG::shouldShowDisassembly):
* dfg/DFGDriver.cpp:
(JSC::DFG::compile):
* dfg/DFGOSRExit.cpp:
(JSC::DFG::OSRExit::considerAddingAsFrequentExitSiteSlow):
* dfg/DFGVariableAccessData.h:
(JSC::DFG::VariableAccessData::shouldUseDoubleFormatAccordingToVote):
* heap/MarkStack.cpp:
(JSC::MarkStackSegmentAllocator::allocate):
(JSC::MarkStackSegmentAllocator::shrinkReserve):
(JSC::MarkStackArray::MarkStackArray):
(JSC::MarkStackThreadSharedData::MarkStackThreadSharedData):
(JSC::SlotVisitor::donateKnownParallel):
(JSC::SlotVisitor::drain):
(JSC::SlotVisitor::drainFromShared):
* heap/MarkStack.h:
(JSC::MarkStack::mergeOpaqueRootsIfProfitable):
(JSC::MarkStack::addOpaqueRoot):
* heap/SlotVisitor.h:
(JSC::SlotVisitor::donate):
* jit/JIT.cpp:
(JSC::JIT::emitOptimizationCheck):
* jsc.cpp:
(printUsageStatement):
(parseArguments):
* runtime/InitializeThreading.cpp:
(JSC::initializeThreadingOnce):
* runtime/JSGlobalData.cpp:
(JSC::enableAssembler):
* runtime/JSGlobalObject.cpp:
(JSC::JSGlobalObject::JSGlobalObject):
* runtime/Options.cpp:
(JSC):
(JSC::overrideOptionWithHeuristic):
(JSC::Options::initialize):
(JSC::Options::setOption):
(JSC::Options::dumpAllOptions):
(JSC::Options::dumpOption):
* runtime/Options.h:
(JSC):
(Options):
(EntryInfo):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121798 268f45cc-cd09-0410-ab3c-d52691b4dbfc