mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-12-04 18:16:39 +00:00
95 lines
3.9 KiB
C++
95 lines
3.9 KiB
C++
/*
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* Copyright (C) 2015-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "FunctionRareData.h"
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#include "JSCInlines.h"
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namespace JSC {
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const ClassInfo FunctionRareData::s_info = { "FunctionRareData", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(FunctionRareData) };
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FunctionRareData* FunctionRareData::create(VM& vm)
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{
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FunctionRareData* rareData = new (NotNull, allocateCell<FunctionRareData>(vm.heap)) FunctionRareData(vm);
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rareData->finishCreation(vm);
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return rareData;
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}
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void FunctionRareData::destroy(JSCell* cell)
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{
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FunctionRareData* rareData = static_cast<FunctionRareData*>(cell);
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rareData->FunctionRareData::~FunctionRareData();
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}
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Structure* FunctionRareData::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
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{
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return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
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}
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void FunctionRareData::visitChildren(JSCell* cell, SlotVisitor& visitor)
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{
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FunctionRareData* rareData = jsCast<FunctionRareData*>(cell);
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rareData->m_objectAllocationProfile.visitAggregate(visitor);
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rareData->m_internalFunctionAllocationProfile.visitAggregate(visitor);
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visitor.append(rareData->m_boundFunctionStructure);
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}
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FunctionRareData::FunctionRareData(VM& vm)
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: Base(vm, vm.functionRareDataStructure.get())
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, m_objectAllocationProfile()
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// We initialize blind so that changes to the prototype after function creation but before
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// the optimizer kicks in don't disable optimizations. Once the optimizer kicks in, the
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// watchpoint will start watching and any changes will both force deoptimization and disable
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// future attempts to optimize. This is necessary because we are guaranteed that the
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// allocation profile is changed exactly once prior to optimizations kicking in. We could be
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// smarter and count the number of times the prototype is clobbered and only optimize if it
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// was clobbered exactly once, but that seems like overkill. In almost all cases it will be
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// clobbered once, and if it's clobbered more than once, that will probably only occur
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// before we started optimizing, anyway.
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, m_objectAllocationProfileWatchpoint(ClearWatchpoint)
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{
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}
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FunctionRareData::~FunctionRareData()
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{
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}
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void FunctionRareData::initializeObjectAllocationProfile(VM& vm, JSGlobalObject* globalObject, JSObject* prototype, size_t inlineCapacity)
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{
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m_objectAllocationProfile.initialize(vm, globalObject, this, prototype, inlineCapacity);
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}
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void FunctionRareData::clear(const char* reason)
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{
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m_objectAllocationProfile.clear();
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m_internalFunctionAllocationProfile.clear();
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m_objectAllocationProfileWatchpoint.fireAll(*vm(), reason);
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}
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}
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