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/*
* Copyright (C) 2009-2018 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 "BatchedTransitionOptimizer.h"
#include "CodeBlock.h"
#include "Debugger.h"
#include "FunctionCodeBlock.h"
#include "FunctionOverrides.h"
#include "JIT.h"
#include "JSCInlines.h"
#include "LLIntEntrypoint.h"
#include "Parser.h"
#include "TypeProfiler.h"
#include "VMInlines.h"
#include <wtf/CommaPrinter.h>
namespace JSC {
const ClassInfo FunctionExecutable::s_info = { "FunctionExecutable", &ScriptExecutable::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(FunctionExecutable) };
FunctionExecutable::FunctionExecutable(VM& vm, const SourceCode& source, UnlinkedFunctionExecutable* unlinkedExecutable, Intrinsic intrinsic)
: ScriptExecutable(vm.functionExecutableStructure.get(), vm, source, unlinkedExecutable->isInStrictContext(), unlinkedExecutable->derivedContextType(), false, EvalContextType::None, intrinsic)
, m_unlinkedExecutable(vm, this, unlinkedExecutable)
{
RELEASE_ASSERT(!source.isNull());
ASSERT(source.length());
}
void FunctionExecutable::finishCreation(VM& vm, ScriptExecutable* topLevelExecutable)
{
Base::finishCreation(vm);
m_topLevelExecutable.set(vm, this, topLevelExecutable ? topLevelExecutable : this);
}
void FunctionExecutable::destroy(JSCell* cell)
{
static_cast<FunctionExecutable*>(cell)->FunctionExecutable::~FunctionExecutable();
}
FunctionCodeBlock* FunctionExecutable::baselineCodeBlockFor(CodeSpecializationKind kind)
{
ExecutableToCodeBlockEdge* edge;
if (kind == CodeForCall)
edge = m_codeBlockForCall.get();
else {
RELEASE_ASSERT(kind == CodeForConstruct);
edge = m_codeBlockForConstruct.get();
}
if (!edge)
return 0;
return static_cast<FunctionCodeBlock*>(edge->codeBlock()->baselineAlternative());
}
void FunctionExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
FunctionExecutable* thisObject = jsCast<FunctionExecutable*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.append(thisObject->m_topLevelExecutable);
visitor.append(thisObject->m_codeBlockForCall);
visitor.append(thisObject->m_codeBlockForConstruct);
visitor.append(thisObject->m_unlinkedExecutable);
if (RareData* rareData = thisObject->m_rareData.get()) {
visitor.append(rareData->m_cachedPolyProtoStructure);
if (TemplateObjectMap* map = rareData->m_templateObjectMap.get()) {
auto locker = holdLock(thisObject->cellLock());
for (auto& entry : *map)
visitor.append(entry.value);
}
}
}
FunctionExecutable* FunctionExecutable::fromGlobalCode(
const Identifier& name, ExecState& exec, const SourceCode& source,
JSObject*& exception, int overrideLineNumber, Optional<int> functionConstructorParametersEndPosition)
{
UnlinkedFunctionExecutable* unlinkedExecutable =
UnlinkedFunctionExecutable::fromGlobalCode(
name, exec, source, exception, overrideLineNumber, functionConstructorParametersEndPosition);
if (!unlinkedExecutable)
return nullptr;
return unlinkedExecutable->link(exec.vm(), nullptr, source, overrideLineNumber);
}
FunctionExecutable::RareData& FunctionExecutable::ensureRareDataSlow()
{
ASSERT(!m_rareData);
auto rareData = makeUnique<RareData>();
rareData->m_lineCount = lineCount();
rareData->m_endColumn = endColumn();
rareData->m_parametersStartOffset = parametersStartOffset();
rareData->m_typeProfilingStartOffset = typeProfilingStartOffset();
rareData->m_typeProfilingEndOffset = typeProfilingEndOffset();
WTF::storeStoreFence();
m_rareData = WTFMove(rareData);
return *m_rareData;
}
void FunctionExecutable::overrideInfo(const FunctionOverrideInfo& overrideInfo)
{
auto& rareData = ensureRareData();
m_source = overrideInfo.sourceCode;
rareData.m_lineCount = overrideInfo.lineCount;
rareData.m_endColumn = overrideInfo.endColumn;
rareData.m_parametersStartOffset = overrideInfo.parametersStartOffset;
rareData.m_typeProfilingStartOffset = overrideInfo.typeProfilingStartOffset;
rareData.m_typeProfilingEndOffset = overrideInfo.typeProfilingEndOffset;
}
auto FunctionExecutable::ensureTemplateObjectMap(VM&) -> TemplateObjectMap&
{
RareData& rareData = ensureRareData();
return ensureTemplateObjectMapImpl(rareData.m_templateObjectMap);
}
} // namespace JSC