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/*
* Copyright (C) 2021 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.
*/
#pragma once
#include "CallLinkInfo.h"
#include "JITCode.h"
#include "JITCodeMap.h"
#include "StructureStubInfo.h"
#include <wtf/ButterflyArray.h>
#include <wtf/CompactPointerTuple.h>
#if ENABLE(JIT)
namespace JSC {
class BinaryArithProfile;
class UnaryArithProfile;
struct BaselineUnlinkedStructureStubInfo;
struct SimpleJumpTable;
struct StringJumpTable;
class MathICHolder {
public:
void adoptMathICs(MathICHolder& other);
JITAddIC* addJITAddIC(BinaryArithProfile*);
JITMulIC* addJITMulIC(BinaryArithProfile*);
JITSubIC* addJITSubIC(BinaryArithProfile*);
JITNegIC* addJITNegIC(UnaryArithProfile*);
private:
Bag<JITAddIC> m_addICs;
Bag<JITMulIC> m_mulICs;
Bag<JITNegIC> m_negICs;
Bag<JITSubIC> m_subICs;
};
class JITConstantPool {
WTF_MAKE_NONCOPYABLE(JITConstantPool);
public:
using Constant = unsigned;
enum class Type : uint8_t {
FunctionDecl,
FunctionExpr,
};
using Value = JITConstant<Type>;
JITConstantPool() = default;
JITConstantPool(JITConstantPool&&) = default;
JITConstantPool& operator=(JITConstantPool&&) = default;
JITConstantPool(Vector<Value>&& constants)
: m_constants(WTFMove(constants))
{
}
size_t size() const { return m_constants.size(); }
Value at(size_t i) const { return m_constants[i]; }
private:
FixedVector<Value> m_constants;
};
class BaselineJITCode : public DirectJITCode, public MathICHolder {
public:
BaselineJITCode(CodeRef<JSEntryPtrTag>, CodePtr<JSEntryPtrTag> withArityCheck);
~BaselineJITCode() override;
PCToCodeOriginMap* pcToCodeOriginMap() override { return m_pcToCodeOriginMap.get(); }
CodeLocationLabel<JSInternalPtrTag> getCallLinkDoneLocationForBytecodeIndex(BytecodeIndex) const;
FixedVector<BaselineUnlinkedCallLinkInfo> m_unlinkedCalls;
FixedVector<BaselineUnlinkedStructureStubInfo> m_unlinkedStubInfos;
FixedVector<SimpleJumpTable> m_switchJumpTables;
FixedVector<StringJumpTable> m_stringSwitchJumpTables;
JITCodeMap m_jitCodeMap;
JITConstantPool m_constantPool;
std::unique_ptr<PCToCodeOriginMap> m_pcToCodeOriginMap;
bool m_isShareable { true };
};
class BaselineJITData final : public ButterflyArray<BaselineJITData, StructureStubInfo, void*> {
friend class LLIntOffsetsExtractor;
public:
using Base = ButterflyArray<BaselineJITData, StructureStubInfo, void*>;
static std::unique_ptr<BaselineJITData> create(unsigned stubInfoSize, unsigned poolSize, CodeBlock* codeBlock)
{
return std::unique_ptr<BaselineJITData> { createImpl(stubInfoSize, poolSize, codeBlock) };
}
explicit BaselineJITData(unsigned poolSize, unsigned stubInfoSize, CodeBlock*);
static constexpr ptrdiff_t offsetOfGlobalObject() { return OBJECT_OFFSETOF(BaselineJITData, m_globalObject); }
static constexpr ptrdiff_t offsetOfStackOffset() { return OBJECT_OFFSETOF(BaselineJITData, m_stackOffset); }
static constexpr ptrdiff_t offsetOfJITExecuteCounter() { return OBJECT_OFFSETOF(BaselineJITData, m_executeCounter) + OBJECT_OFFSETOF(BaselineExecutionCounter, m_counter); }
static constexpr ptrdiff_t offsetOfJITExecutionActiveThreshold() { return OBJECT_OFFSETOF(BaselineJITData, m_executeCounter) + OBJECT_OFFSETOF(BaselineExecutionCounter, m_activeThreshold); }
static constexpr ptrdiff_t offsetOfJITExecutionTotalCount() { return OBJECT_OFFSETOF(BaselineJITData, m_executeCounter) + OBJECT_OFFSETOF(BaselineExecutionCounter, m_totalCount); }
StructureStubInfo& stubInfo(unsigned index)
{
auto span = stubInfos();
return span[span.size() - index - 1];
}
auto stubInfos() -> decltype(leadingSpan())
{
return leadingSpan();
}
BaselineExecutionCounter& executeCounter() { return m_executeCounter; }
const BaselineExecutionCounter& executeCounter() const { return m_executeCounter; }
JSGlobalObject* m_globalObject { nullptr }; // This is not marked since owner CodeBlock will mark JSGlobalObject.
intptr_t m_stackOffset { 0 };
BaselineExecutionCounter m_executeCounter;
};
} // namespace JSC
#endif // ENABLE(JIT)
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