fourthTier: JITCode should abstract exactly how the JIT code is structured and where it was allocated
https://bugs.webkit.org/show_bug.cgi?id=113437

Reviewed by Mark Hahnenberg.

JITCode is now a virtual base class, which will allow different JITs to have radically
different memory allocation and management conventions in the future. It will also
make it easier to store JIT-specific meta-data in CodeBlock just by putting it into
an appropriate JITCode subclass.

For now there is one subclass, DirectJITCode, which just behaves like JITCode used to
behave.

* assembler/RepatchBuffer.h:
(JSC::RepatchBuffer::RepatchBuffer):
* bytecode/CodeBlock.cpp:
(JSC::CodeBlock::resetStubInternal):
(JSC::CodeBlock::bytecodeOffset):
(JSC::CodeBlock::codeOriginForReturn):
* bytecode/CodeBlock.h:
(JSC::CodeBlock::setJITCode):
(JSC::CodeBlock::getJITCode):
(JSC::CodeBlock::getJITType):
(CodeBlock):
* dfg/DFGDriver.cpp:
(JSC::DFG::compile):
(JSC::DFG::tryCompile):
(JSC::DFG::tryCompileFunction):
* dfg/DFGDriver.h:
(DFG):
(JSC::DFG::tryCompile):
(JSC::DFG::tryCompileFunction):
* dfg/DFGJITCompiler.cpp:
(JSC::DFG::JITCompiler::compile):
(JSC::DFG::JITCompiler::compileFunction):
* dfg/DFGJITCompiler.h:
(JITCompiler):
* dfg/DFGOSREntry.cpp:
(JSC::DFG::prepareOSREntry):
* dfg/DFGOSRExit.cpp:
(JSC::DFG::OSRExit::codeLocationForRepatch):
* dfg/DFGOSRExitCompiler32_64.cpp:
(JSC::DFG::OSRExitCompiler::compileExit):
* dfg/DFGOSRExitCompiler64.cpp:
(JSC::DFG::OSRExitCompiler::compileExit):
* dfg/DFGOperations.cpp:
* interpreter/Interpreter.cpp:
(JSC::Interpreter::execute):
(JSC::Interpreter::executeCall):
(JSC::Interpreter::executeConstruct):
* jit/JIT.cpp:
(JSC::JIT::privateCompile):
* jit/JIT.h:
(JSC::JIT::compile):
(JIT):
* jit/JITCode.cpp:
(JSC):
(JSC::JITCode::JITCode):
(JSC::JITCode::~JITCode):
(JSC::JITCode::execute):
(JSC::JITCode::hostFunction):
(JSC::DirectJITCode::DirectJITCode):
(JSC::DirectJITCode::~DirectJITCode):
(JSC::DirectJITCode::addressForCall):
(JSC::DirectJITCode::executableAddressAtOffset):
(JSC::DirectJITCode::dataAddressAtOffset):
(JSC::DirectJITCode::offsetOf):
(JSC::DirectJITCode::size):
(JSC::DirectJITCode::contains):
* jit/JITCode.h:
(JSC):
(JITCode):
(JSC::JITCode::bottomTierJIT):
(JSC::JITCode::topTierJIT):
(JSC::JITCode::nextTierJIT):
(JSC::JITCode::isOptimizingJIT):
(JSC::JITCode::isBaselineCode):
(JSC::JITCode::jitType):
(JSC::JITCode::jitTypeFor):
(JSC::JITCode::executableAddress):
(JSC::JITCode::start):
(JSC::JITCode::end):
(DirectJITCode):
* jit/JITDriver.h:
(JSC::jitCompileIfAppropriate):
(JSC::jitCompileFunctionIfAppropriate):
* jit/JITStubs.cpp:
(JSC::lazyLinkFor):
(JSC::DEFINE_STUB_FUNCTION):
* jit/ThunkGenerators.cpp:
(JSC::virtualForGenerator):
* llint/LLIntEntrypoints.cpp:
(JSC::LLInt::getFunctionEntrypoint):
(JSC::LLInt::getEvalEntrypoint):
(JSC::LLInt::getProgramEntrypoint):
* llint/LLIntEntrypoints.h:
(JSC):
(LLInt):
(JSC::LLInt::getEntrypoint):
* llint/LLIntSlowPaths.cpp:
(JSC::LLInt::jitCompileAndSetHeuristics):
(JSC::LLInt::entryOSR):
(JSC::LLInt::LLINT_SLOW_PATH_DECL):
* runtime/Executable.cpp:
(JSC::EvalExecutable::compileInternal):
(JSC::ProgramExecutable::compileInternal):
(JSC::FunctionExecutable::compileForCallInternal):
(JSC::FunctionExecutable::compileForConstructInternal):
* runtime/Executable.h:
(JSC::ExecutableBase::generatedJITCodeForCall):
(JSC::ExecutableBase::generatedJITCodeForConstruct):
(JSC::ExecutableBase::generatedJITCodeFor):
(ExecutableBase):
(JSC::ExecutableBase::hostCodeEntryFor):
(JSC::ExecutableBase::jsCodeEntryFor):
(JSC::ExecutableBase::jsCodeWithArityCheckEntryFor):
(JSC::NativeExecutable::create):
(JSC::NativeExecutable::finishCreation):
(JSC::EvalExecutable::generatedJITCode):
(JSC::ProgramExecutable::generatedJITCode):
* runtime/ExecutionHarness.h:
(JSC::prepareForExecution):
(JSC::prepareFunctionForExecution):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153113 268f45cc-cd09-0410-ab3c-d52691b4dbfc