/*

* Copyright (C) 2009, 2010 Apple Inc. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

*

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#include "config.h"

#include "Executable.h"

#include "BytecodeGenerator.h"

#include "CodeBlock.h"

#include "DFGDriver.h"

#include "JIT.h"

#include "JITDriver.h"

#include "Parser.h"

#include "UStringBuilder.h"

#include "Vector.h"

namespace JSC {

const ClassInfo ExecutableBase::s_info = { "Executable", 0, 0, 0, CREATE_METHOD_TABLE(ExecutableBase) };

#if ENABLE(JIT)

void ExecutableBase::destroy(JSCell* cell)

{

jsCast<ExecutableBase*>(cell)->ExecutableBase::~ExecutableBase();

}

#endif

inline void ExecutableBase::clearCode()

{

#if ENABLE(JIT)

m_jitCodeForCall.clear();

m_jitCodeForConstruct.clear();

m_jitCodeForCallWithArityCheck = MacroAssemblerCodePtr();

m_jitCodeForConstructWithArityCheck = MacroAssemblerCodePtr();

#endif

m_numParametersForCall = NUM_PARAMETERS_NOT_COMPILED;

m_numParametersForConstruct = NUM_PARAMETERS_NOT_COMPILED;

}

#if ENABLE(DFG_JIT)

Intrinsic ExecutableBase::intrinsic() const

{

if (const NativeExecutable* nativeExecutable = jsDynamicCast<const NativeExecutable*>(this))

return nativeExecutable->intrinsic();

return NoIntrinsic;

}

#endif

const ClassInfo NativeExecutable::s_info = { "NativeExecutable", &ExecutableBase::s_info, 0, 0, CREATE_METHOD_TABLE(NativeExecutable) };

#if ENABLE(JIT)

void NativeExecutable::destroy(JSCell* cell)

{

jsCast<NativeExecutable*>(cell)->NativeExecutable::~NativeExecutable();

}

#endif

#if ENABLE(DFG_JIT)

Intrinsic NativeExecutable::intrinsic() const

{

return m_intrinsic;

}

#endif

#if ENABLE(JIT)

// Utility method used for jettisoning code blocks.

template<typename T>

static void jettisonCodeBlock(JSGlobalData& globalData, OwnPtr<T>& codeBlock)

{

ASSERT(codeBlock->getJITType() != JITCode::BaselineJIT);

ASSERT(codeBlock->alternative());

OwnPtr<T> codeBlockToJettison = codeBlock.release();

codeBlock = static_pointer_cast<T>(codeBlockToJettison->releaseAlternative());

codeBlockToJettison->unlinkIncomingCalls();

globalData.heap.jettisonDFGCodeBlock(static_pointer_cast<CodeBlock>(codeBlockToJettison.release()));

}

#endif

void NativeExecutable::finalize(JSCell* cell)

{

jsCast<NativeExecutable*>(cell)->clearCode();

}

const ClassInfo ScriptExecutable::s_info = { "ScriptExecutable", &ExecutableBase::s_info, 0, 0, CREATE_METHOD_TABLE(ScriptExecutable) };

#if ENABLE(JIT)

void ScriptExecutable::destroy(JSCell* cell)

{

jsCast<ScriptExecutable*>(cell)->ScriptExecutable::~ScriptExecutable();

}

#endif

const ClassInfo EvalExecutable::s_info = { "EvalExecutable", &ScriptExecutable::s_info, 0, 0, CREATE_METHOD_TABLE(EvalExecutable) };

EvalExecutable::EvalExecutable(ExecState* exec, const SourceCode& source, bool inStrictContext)

: ScriptExecutable(exec->globalData().evalExecutableStructure.get(), exec, source, inStrictContext)

{

}

void EvalExecutable::destroy(JSCell* cell)

{

jsCast<EvalExecutable*>(cell)->EvalExecutable::~EvalExecutable();

}

const ClassInfo ProgramExecutable::s_info = { "ProgramExecutable", &ScriptExecutable::s_info, 0, 0, CREATE_METHOD_TABLE(ProgramExecutable) };

ProgramExecutable::ProgramExecutable(ExecState* exec, const SourceCode& source)

: ScriptExecutable(exec->globalData().programExecutableStructure.get(), exec, source, false)

{

}

void ProgramExecutable::destroy(JSCell* cell)

{

jsCast<ProgramExecutable*>(cell)->ProgramExecutable::~ProgramExecutable();

}

const ClassInfo FunctionExecutable::s_info = { "FunctionExecutable", &ScriptExecutable::s_info, 0, 0, CREATE_METHOD_TABLE(FunctionExecutable) };

FunctionExecutable::FunctionExecutable(JSGlobalData& globalData, const Identifier& name, const Identifier& inferredName, const SourceCode& source, bool forceUsesArguments, FunctionParameters* parameters, bool inStrictContext)

: ScriptExecutable(globalData.functionExecutableStructure.get(), globalData, source, inStrictContext)

, m_numCapturedVariables(0)

, m_forceUsesArguments(forceUsesArguments)

, m_parameters(parameters)

, m_name(name)

, m_inferredName(inferredName.isNull() ? globalData.propertyNames->emptyIdentifier : inferredName)

, m_symbolTable(0)

{

}

FunctionExecutable::FunctionExecutable(ExecState* exec, const Identifier& name, const Identifier& inferredName, const SourceCode& source, bool forceUsesArguments, FunctionParameters* parameters, bool inStrictContext)

: ScriptExecutable(exec->globalData().functionExecutableStructure.get(), exec, source, inStrictContext)

, m_numCapturedVariables(0)

, m_forceUsesArguments(forceUsesArguments)

, m_parameters(parameters)

, m_name(name)

, m_inferredName(inferredName.isNull() ? exec->globalData().propertyNames->emptyIdentifier : inferredName)

, m_symbolTable(0)

{

}

void FunctionExecutable::destroy(JSCell* cell)

{

jsCast<FunctionExecutable*>(cell)->FunctionExecutable::~FunctionExecutable();

}

JSObject* EvalExecutable::compileOptimized(ExecState* exec, ScopeChainNode* scopeChainNode)

{

ASSERT(exec->globalData().dynamicGlobalObject);

ASSERT(!!m_evalCodeBlock);

JSObject* error = 0;

if (m_evalCodeBlock->getJITType() != JITCode::topTierJIT())

error = compileInternal(exec, scopeChainNode, JITCode::nextTierJIT(m_evalCodeBlock->getJITType()));

ASSERT(!!m_evalCodeBlock);

return error;

}

JSObject* EvalExecutable::compileInternal(ExecState* exec, ScopeChainNode* scopeChainNode, JITCode::JITType jitType)

{

SamplingRegion samplingRegion(jitType == JITCode::BaselineJIT ? "Baseline Compilation (TOTAL)" : "DFG Compilation (TOTAL)");

#if !ENABLE(JIT)

UNUSED_PARAM(jitType);

#endif

JSObject* exception = 0;

JSGlobalData* globalData = &exec->globalData();

JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();

if (!!m_evalCodeBlock && m_evalCodeBlock->canProduceCopyWithBytecode()) {

BytecodeDestructionBlocker blocker(m_evalCodeBlock.get());

OwnPtr<EvalCodeBlock> newCodeBlock = adoptPtr(new EvalCodeBlock(CodeBlock::CopyParsedBlock, *m_evalCodeBlock));

newCodeBlock->setAlternative(static_pointer_cast<CodeBlock>(m_evalCodeBlock.release()));

m_evalCodeBlock = newCodeBlock.release();

} else {

if (!lexicalGlobalObject->evalEnabled())

return throwError(exec, createEvalError(exec, "Eval is disabled"));

RefPtr<EvalNode> evalNode = parse<EvalNode>(globalData, lexicalGlobalObject, m_source, 0, isStrictMode() ? JSParseStrict : JSParseNormal, EvalNode::isFunctionNode ? JSParseFunctionCode : JSParseProgramCode, lexicalGlobalObject->debugger(), exec, &exception);

if (!evalNode) {

ASSERT(exception);

return exception;

}

recordParse(evalNode->features(), evalNode->hasCapturedVariables(), evalNode->lineNo(), evalNode->lastLine());

JSGlobalObject* globalObject = scopeChainNode->globalObject.get();

OwnPtr<CodeBlock> previousCodeBlock = m_evalCodeBlock.release();

ASSERT((jitType == JITCode::bottomTierJIT()) == !previousCodeBlock);

m_evalCodeBlock = adoptPtr(new EvalCodeBlock(this, globalObject, source().provider(), scopeChainNode->localDepth(), previousCodeBlock.release()));

OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(evalNode.get(), scopeChainNode, m_evalCodeBlock->symbolTable(), m_evalCodeBlock.get(), !!m_evalCodeBlock->alternative() ? OptimizingCompilation : FirstCompilation)));

if ((exception = generator->generate())) {

m_evalCodeBlock = static_pointer_cast<EvalCodeBlock>(m_evalCodeBlock->releaseAlternative());

evalNode->destroyData();

return exception;

}

evalNode->destroyData();

m_evalCodeBlock->copyPostParseDataFromAlternative();

}

#if ENABLE(JIT)

if (!jitCompileIfAppropriate(*globalData, m_evalCodeBlock, m_jitCodeForCall, jitType))

return 0;

#endif

#if ENABLE(JIT)

#if ENABLE(CLASSIC_INTERPRETER)

if (!m_jitCodeForCall)

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_evalCodeBlock));

else

#endif

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_evalCodeBlock) + m_jitCodeForCall.size());

#else

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_evalCodeBlock));

#endif

return 0;

}

#if ENABLE(JIT)

void EvalExecutable::jettisonOptimizedCode(JSGlobalData& globalData)

{

jettisonCodeBlock(globalData, m_evalCodeBlock);

m_jitCodeForCall = m_evalCodeBlock->getJITCode();

ASSERT(!m_jitCodeForCallWithArityCheck);

}

#endif

void EvalExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)

{

EvalExecutable* thisObject = jsCast<EvalExecutable*>(cell);

ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);

COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);

ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());

ScriptExecutable::visitChildren(thisObject, visitor);

if (thisObject->m_evalCodeBlock)

thisObject->m_evalCodeBlock->visitAggregate(visitor);

}

void EvalExecutable::unlinkCalls()

{

#if ENABLE(JIT)

if (!m_jitCodeForCall)

return;

ASSERT(m_evalCodeBlock);

m_evalCodeBlock->unlinkCalls();

#endif

}

void EvalExecutable::finalize(JSCell* cell)

{

jsCast<EvalExecutable*>(cell)->clearCode();

}

inline void EvalExecutable::clearCode()

{

if (m_evalCodeBlock) {

m_evalCodeBlock->clearEvalCache();

m_evalCodeBlock.clear();

}

Base::clearCode();

}

JSObject* ProgramExecutable::checkSyntax(ExecState* exec)

{

JSObject* exception = 0;

JSGlobalData* globalData = &exec->globalData();

JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();

RefPtr<ProgramNode> programNode = parse<ProgramNode>(globalData, lexicalGlobalObject, m_source, 0, JSParseNormal, ProgramNode::isFunctionNode ? JSParseFunctionCode : JSParseProgramCode, lexicalGlobalObject->debugger(), exec, &exception);

if (programNode)

return 0;

ASSERT(exception);

return exception;

}

JSObject* ProgramExecutable::compileOptimized(ExecState* exec, ScopeChainNode* scopeChainNode)

{

ASSERT(exec->globalData().dynamicGlobalObject);

ASSERT(!!m_programCodeBlock);

JSObject* error = 0;

if (m_programCodeBlock->getJITType() != JITCode::topTierJIT())

error = compileInternal(exec, scopeChainNode, JITCode::nextTierJIT(m_programCodeBlock->getJITType()));

ASSERT(!!m_programCodeBlock);

return error;

}

JSObject* ProgramExecutable::compileInternal(ExecState* exec, ScopeChainNode* scopeChainNode, JITCode::JITType jitType)

{

SamplingRegion samplingRegion(jitType == JITCode::BaselineJIT ? "Baseline Compilation (TOTAL)" : "DFG Compilation (TOTAL)");

#if !ENABLE(JIT)

UNUSED_PARAM(jitType);

#endif

JSObject* exception = 0;

JSGlobalData* globalData = &exec->globalData();

JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();

if (!!m_programCodeBlock && m_programCodeBlock->canProduceCopyWithBytecode()) {

BytecodeDestructionBlocker blocker(m_programCodeBlock.get());

OwnPtr<ProgramCodeBlock> newCodeBlock = adoptPtr(new ProgramCodeBlock(CodeBlock::CopyParsedBlock, *m_programCodeBlock));

newCodeBlock->setAlternative(static_pointer_cast<CodeBlock>(m_programCodeBlock.release()));

m_programCodeBlock = newCodeBlock.release();

} else {

RefPtr<ProgramNode> programNode = parse<ProgramNode>(globalData, lexicalGlobalObject, m_source, 0, isStrictMode() ? JSParseStrict : JSParseNormal, ProgramNode::isFunctionNode ? JSParseFunctionCode : JSParseProgramCode, lexicalGlobalObject->debugger(), exec, &exception);

if (!programNode) {

ASSERT(exception);

return exception;

}

recordParse(programNode->features(), programNode->hasCapturedVariables(), programNode->lineNo(), programNode->lastLine());

JSGlobalObject* globalObject = scopeChainNode->globalObject.get();

OwnPtr<CodeBlock> previousCodeBlock = m_programCodeBlock.release();

ASSERT((jitType == JITCode::bottomTierJIT()) == !previousCodeBlock);

m_programCodeBlock = adoptPtr(new ProgramCodeBlock(this, GlobalCode, globalObject, source().provider(), previousCodeBlock.release()));

OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(programNode.get(), scopeChainNode, &globalObject->symbolTable(), m_programCodeBlock.get(), !!m_programCodeBlock->alternative() ? OptimizingCompilation : FirstCompilation)));

if ((exception = generator->generate())) {

m_programCodeBlock = static_pointer_cast<ProgramCodeBlock>(m_programCodeBlock->releaseAlternative());

programNode->destroyData();

return exception;

}

programNode->destroyData();

m_programCodeBlock->copyPostParseDataFromAlternative();

}

#if ENABLE(JIT)

if (!jitCompileIfAppropriate(*globalData, m_programCodeBlock, m_jitCodeForCall, jitType))

return 0;

#endif

#if ENABLE(JIT)

#if ENABLE(CLASSIC_INTERPRETER)

if (!m_jitCodeForCall)

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_programCodeBlock));

else

#endif

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_programCodeBlock) + m_jitCodeForCall.size());

#else

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_programCodeBlock));

#endif

return 0;

}

#if ENABLE(JIT)

void ProgramExecutable::jettisonOptimizedCode(JSGlobalData& globalData)

{

jettisonCodeBlock(globalData, m_programCodeBlock);

m_jitCodeForCall = m_programCodeBlock->getJITCode();

ASSERT(!m_jitCodeForCallWithArityCheck);

}

#endif

void ProgramExecutable::unlinkCalls()

{

#if ENABLE(JIT)

if (!m_jitCodeForCall)

return;

ASSERT(m_programCodeBlock);

m_programCodeBlock->unlinkCalls();

#endif

}

void ProgramExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)

{

ProgramExecutable* thisObject = jsCast<ProgramExecutable*>(cell);

ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);

COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);

ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());

ScriptExecutable::visitChildren(thisObject, visitor);

if (thisObject->m_programCodeBlock)

thisObject->m_programCodeBlock->visitAggregate(visitor);

}

void ProgramExecutable::finalize(JSCell* cell)

{

jsCast<ProgramExecutable*>(cell)->clearCode();

}

inline void ProgramExecutable::clearCode()

{

if (m_programCodeBlock) {

m_programCodeBlock->clearEvalCache();

m_programCodeBlock.clear();

}

Base::clearCode();

}

FunctionCodeBlock* FunctionExecutable::baselineCodeBlockFor(CodeSpecializationKind kind)

{

FunctionCodeBlock* result;

if (kind == CodeForCall)

result = m_codeBlockForCall.get();

else {

ASSERT(kind == CodeForConstruct);

result = m_codeBlockForConstruct.get();

}

if (!result)

return 0;

while (result->alternative())

result = static_cast<FunctionCodeBlock*>(result->alternative());

ASSERT(result);

ASSERT(result->getJITType() == JITCode::BaselineJIT);

return result;

}

JSObject* FunctionExecutable::compileOptimizedForCall(ExecState* exec, ScopeChainNode* scopeChainNode)

{

ASSERT(exec->globalData().dynamicGlobalObject);

ASSERT(!!m_codeBlockForCall);

JSObject* error = 0;

if (m_codeBlockForCall->getJITType() != JITCode::topTierJIT())

error = compileForCallInternal(exec, scopeChainNode, JITCode::nextTierJIT(m_codeBlockForCall->getJITType()));

ASSERT(!!m_codeBlockForCall);

return error;

}

JSObject* FunctionExecutable::compileOptimizedForConstruct(ExecState* exec, ScopeChainNode* scopeChainNode)

{

ASSERT(exec->globalData().dynamicGlobalObject);

ASSERT(!!m_codeBlockForConstruct);

JSObject* error = 0;

if (m_codeBlockForConstruct->getJITType() != JITCode::topTierJIT())

error = compileForConstructInternal(exec, scopeChainNode, JITCode::nextTierJIT(m_codeBlockForConstruct->getJITType()));

ASSERT(!!m_codeBlockForConstruct);

return error;

}

FunctionCodeBlock* FunctionExecutable::codeBlockWithBytecodeFor(CodeSpecializationKind kind)

{

FunctionCodeBlock* codeBlock = baselineCodeBlockFor(kind);

if (codeBlock->canProduceCopyWithBytecode())

return codeBlock;

return 0;

}

PassOwnPtr<FunctionCodeBlock> FunctionExecutable::produceCodeBlockFor(ScopeChainNode* scopeChainNode, CompilationKind compilationKind, CodeSpecializationKind specializationKind, JSObject*& exception)

{

if (!!codeBlockFor(specializationKind) && codeBlockFor(specializationKind)->canProduceCopyWithBytecode()) {

BytecodeDestructionBlocker blocker(codeBlockFor(specializationKind).get());

return adoptPtr(new FunctionCodeBlock(CodeBlock::CopyParsedBlock, *codeBlockFor(specializationKind)));

}

exception = 0;

JSGlobalData* globalData = scopeChainNode->globalData;

JSGlobalObject* globalObject = scopeChainNode->globalObject.get();

RefPtr<FunctionBodyNode> body = parse<FunctionBodyNode>(globalData, globalObject, m_source, m_parameters.get(), isStrictMode() ? JSParseStrict : JSParseNormal, FunctionBodyNode::isFunctionNode ? JSParseFunctionCode : JSParseProgramCode, 0, 0, &exception);

if (!body) {

ASSERT(exception);

return nullptr;

}

if (m_forceUsesArguments)

body->setUsesArguments();

body->finishParsing(m_parameters, m_name);

recordParse(body->features(), body->hasCapturedVariables(), body->lineNo(), body->lastLine());

OwnPtr<FunctionCodeBlock> result;

ASSERT((compilationKind == FirstCompilation) == !codeBlockFor(specializationKind));

result = adoptPtr(new FunctionCodeBlock(this, FunctionCode, globalObject, source().provider(), source().startOffset(), specializationKind == CodeForConstruct));

OwnPtr<BytecodeGenerator> generator(adoptPtr(new BytecodeGenerator(body.get(), scopeChainNode, result->symbolTable(), result.get(), compilationKind)));

exception = generator->generate();

body->destroyData();

if (exception)

return nullptr;

result->copyPostParseDataFrom(codeBlockFor(specializationKind).get());

return result.release();

}

JSObject* FunctionExecutable::compileForCallInternal(ExecState* exec, ScopeChainNode* scopeChainNode, JITCode::JITType jitType)

{

SamplingRegion samplingRegion(jitType == JITCode::BaselineJIT ? "Baseline Compilation (TOTAL)" : "DFG Compilation (TOTAL)");

#if !ENABLE(JIT)

UNUSED_PARAM(exec);

UNUSED_PARAM(jitType);

UNUSED_PARAM(exec);

#endif

ASSERT((jitType == JITCode::bottomTierJIT()) == !m_codeBlockForCall);

JSObject* exception;

OwnPtr<FunctionCodeBlock> newCodeBlock = produceCodeBlockFor(scopeChainNode, !!m_codeBlockForCall ? OptimizingCompilation : FirstCompilation, CodeForCall, exception);

if (!newCodeBlock)

return exception;

newCodeBlock->setAlternative(static_pointer_cast<CodeBlock>(m_codeBlockForCall.release()));

m_codeBlockForCall = newCodeBlock.release();

m_numParametersForCall = m_codeBlockForCall->numParameters();

ASSERT(m_numParametersForCall);

m_numCapturedVariables = m_codeBlockForCall->m_numCapturedVars;

m_symbolTable = m_codeBlockForCall->sharedSymbolTable();

#if ENABLE(JIT)

if (!jitCompileFunctionIfAppropriate(exec->globalData(), m_codeBlockForCall, m_jitCodeForCall, m_jitCodeForCallWithArityCheck, m_symbolTable, jitType))

return 0;

#endif

#if ENABLE(JIT)

#if ENABLE(CLASSIC_INTERPRETER)

if (!m_jitCodeForCall)

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_codeBlockForCall));

else

#endif

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_codeBlockForCall) + m_jitCodeForCall.size());

#else

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_codeBlockForCall));

#endif

return 0;

}

JSObject* FunctionExecutable::compileForConstructInternal(ExecState* exec, ScopeChainNode* scopeChainNode, JITCode::JITType jitType)

{

SamplingRegion samplingRegion(jitType == JITCode::BaselineJIT ? "Baseline Compilation (TOTAL)" : "DFG Compilation (TOTAL)");

#if !ENABLE(JIT)

UNUSED_PARAM(jitType);

UNUSED_PARAM(exec);

#endif

ASSERT((jitType == JITCode::bottomTierJIT()) == !m_codeBlockForConstruct);

JSObject* exception;

OwnPtr<FunctionCodeBlock> newCodeBlock = produceCodeBlockFor(scopeChainNode, !!m_codeBlockForConstruct ? OptimizingCompilation : FirstCompilation, CodeForConstruct, exception);

if (!newCodeBlock)

return exception;

newCodeBlock->setAlternative(static_pointer_cast<CodeBlock>(m_codeBlockForConstruct.release()));

m_codeBlockForConstruct = newCodeBlock.release();

m_numParametersForConstruct = m_codeBlockForConstruct->numParameters();

ASSERT(m_numParametersForConstruct);

m_numCapturedVariables = m_codeBlockForConstruct->m_numCapturedVars;

m_symbolTable = m_codeBlockForConstruct->sharedSymbolTable();

#if ENABLE(JIT)

if (!jitCompileFunctionIfAppropriate(exec->globalData(), m_codeBlockForConstruct, m_jitCodeForConstruct, m_jitCodeForConstructWithArityCheck, m_symbolTable, jitType))

return 0;

#endif

#if ENABLE(JIT)

#if ENABLE(CLASSIC_INTERPRETER)

if (!m_jitCodeForConstruct)

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_codeBlockForConstruct));

else

#endif

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_codeBlockForConstruct) + m_jitCodeForConstruct.size());

#else

Heap::heap(this)->reportExtraMemoryCost(sizeof(*m_codeBlockForConstruct));

#endif

return 0;

}

#if ENABLE(JIT)

void FunctionExecutable::jettisonOptimizedCodeForCall(JSGlobalData& globalData)

{

jettisonCodeBlock(globalData, m_codeBlockForCall);

m_jitCodeForCall = m_codeBlockForCall->getJITCode();

m_jitCodeForCallWithArityCheck = m_codeBlockForCall->getJITCodeWithArityCheck();

}

void FunctionExecutable::jettisonOptimizedCodeForConstruct(JSGlobalData& globalData)

{

jettisonCodeBlock(globalData, m_codeBlockForConstruct);

m_jitCodeForConstruct = m_codeBlockForConstruct->getJITCode();

m_jitCodeForConstructWithArityCheck = m_codeBlockForConstruct->getJITCodeWithArityCheck();

}

#endif

void FunctionExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)

{

FunctionExecutable* thisObject = jsCast<FunctionExecutable*>(cell);

ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);

COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);

ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());

ScriptExecutable::visitChildren(thisObject, visitor);

if (thisObject->m_nameValue)

visitor.append(&thisObject->m_nameValue);

if (thisObject->m_codeBlockForCall)

thisObject->m_codeBlockForCall->visitAggregate(visitor);

if (thisObject->m_codeBlockForConstruct)

thisObject->m_codeBlockForConstruct->visitAggregate(visitor);

}

void FunctionExecutable::discardCode()

{

#if ENABLE(JIT)

// These first two checks are to handle the rare case where

// we are trying to evict code for a function during its

// codegen.

if (!m_jitCodeForCall && m_codeBlockForCall)

return;

if (!m_jitCodeForConstruct && m_codeBlockForConstruct)

return;

#endif

clearCode();

}

void FunctionExecutable::finalize(JSCell* cell)

{

jsCast<FunctionExecutable*>(cell)->clearCode();

}

inline void FunctionExecutable::clearCode()

{

if (m_codeBlockForCall) {

m_codeBlockForCall->clearEvalCache();

m_codeBlockForCall.clear();

}

if (m_codeBlockForConstruct) {

m_codeBlockForConstruct->clearEvalCache();

m_codeBlockForConstruct.clear();

}

Base::clearCode();

}

void FunctionExecutable::unlinkCalls()

{

#if ENABLE(JIT)

if (!!m_jitCodeForCall) {

ASSERT(m_codeBlockForCall);

m_codeBlockForCall->unlinkCalls();

}

if (!!m_jitCodeForConstruct) {

ASSERT(m_codeBlockForConstruct);

m_codeBlockForConstruct->unlinkCalls();

}

#endif

}

FunctionExecutable* FunctionExecutable::fromGlobalCode(const Identifier& functionName, ExecState* exec, Debugger* debugger, const SourceCode& source, JSObject** exception)

{

JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();

RefPtr<ProgramNode> program = parse<ProgramNode>(&exec->globalData(), lexicalGlobalObject, source, 0, JSParseNormal, ProgramNode::isFunctionNode ? JSParseFunctionCode : JSParseProgramCode, debugger, exec, exception);

if (!program) {

ASSERT(*exception);

return 0;

}

// Uses of this function that would not result in a single function expression are invalid.

StatementNode* exprStatement = program->singleStatement();

ASSERT(exprStatement);

ASSERT(exprStatement->isExprStatement());

ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();

ASSERT(funcExpr);

ASSERT(funcExpr->isFuncExprNode());

FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();

ASSERT(body);

return FunctionExecutable::create(exec->globalData(), functionName, functionName, body->source(), body->usesArguments(), body->parameters(), body->isStrictMode(), body->lineNo(), body->lastLine());

}

UString FunctionExecutable::paramString() const

{

FunctionParameters& parameters = *m_parameters;

UStringBuilder builder;

for (size_t pos = 0; pos < parameters.size(); ++pos) {

if (!builder.isEmpty())

builder.append(", ");

builder.append(parameters[pos].ustring());

}

return builder.toUString();

}

}