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* Copyright (C) 2019 Apple Inc. All rights reserved.
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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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* 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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* 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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#if ENABLE(WEBASSEMBLY)
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#include "BytecodeConventions.h"
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#include "InstructionStream.h"
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#include "MacroAssemblerCodeRef.h"
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#include "WasmLLIntTierUpCounter.h"
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#include <wtf/HashMap.h>
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#include <wtf/Vector.h>
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class LLIntOffsetsExtractor;
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template<typename Traits>
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class BytecodeGeneratorBase;
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struct GeneratorTraits;
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// FIXME: Consider merging this with LLIntCallee
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// https://bugs.webkit.org/show_bug.cgi?id=203691
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class FunctionCodeBlock {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(FunctionCodeBlock);
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friend BytecodeGeneratorBase<GeneratorTraits>;
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friend LLIntOffsetsExtractor;
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friend class LLIntGenerator;
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FunctionCodeBlock(uint32_t functionIndex)
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: m_functionIndex(functionIndex)
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uint32_t functionIndex() const { return m_functionIndex; }
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int numVars() const { return m_numVars; }
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int numCalleeLocals() const { return m_numCalleeLocals; }
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uint32_t numArguments() const { return m_numArguments; }
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const Vector<Type>& constantTypes() const { return m_constantTypes; }
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const Vector<uint64_t>& constants() const { return m_constants; }
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const InstructionStream& instructions() const { return *m_instructions; }
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void setNumVars(int numVars) { m_numVars = numVars; }
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void setNumCalleeLocals(int numCalleeLocals) { m_numCalleeLocals = numCalleeLocals; }
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ALWAYS_INLINE uint64_t getConstant(VirtualRegister reg) const { return m_constants[reg.toConstantIndex()]; }
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ALWAYS_INLINE Type getConstantType(VirtualRegister reg) const
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ASSERT(Options::dumpGeneratedWasmBytecodes());
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return m_constantTypes[reg.toConstantIndex()];
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void setInstructions(std::unique_ptr<InstructionStream>);
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void addJumpTarget(InstructionStream::Offset jumpTarget) { m_jumpTargets.append(jumpTarget); }
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InstructionStream::Offset numberOfJumpTargets() { return m_jumpTargets.size(); }
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InstructionStream::Offset lastJumpTarget() { return m_jumpTargets.last(); }
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void addOutOfLineJumpTarget(InstructionStream::Offset, int target);
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const Instruction* outOfLineJumpTarget(const Instruction*);
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InstructionStream::Offset outOfLineJumpOffset(InstructionStream::Offset);
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InstructionStream::Offset outOfLineJumpOffset(const InstructionStream::Ref& instruction)
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return outOfLineJumpOffset(instruction.offset());
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inline InstructionStream::Offset bytecodeOffset(const Instruction* returnAddress)
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const auto* instructionsBegin = m_instructions->at(0).ptr();
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const auto* instructionsEnd = reinterpret_cast<const Instruction*>(reinterpret_cast<uintptr_t>(instructionsBegin) + m_instructions->size());
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RELEASE_ASSERT(returnAddress >= instructionsBegin && returnAddress < instructionsEnd);
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return returnAddress - instructionsBegin;
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LLIntTierUpCounter& tierUpCounter() { return m_tierUpCounter; }
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unsigned addSignature(const Signature&);
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const Signature& signature(unsigned index) const;
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struct JumpTableEntry {
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unsigned startOffset;
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using JumpTable = Vector<JumpTableEntry>;
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JumpTable& addJumpTable(size_t numberOfEntries);
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const JumpTable& jumpTable(unsigned tableIndex) const;
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unsigned numberOfJumpTables() const;
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using OutOfLineJumpTargets = HashMap<InstructionStream::Offset, int>;
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uint32_t m_functionIndex;
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// Used for the number of WebAssembly locals, as in https://webassembly.github.io/spec/core/syntax/modules.html#syntax-local
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// Number of VirtualRegister. The naming is unfortunate, but has to match UnlinkedCodeBlock
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int m_numCalleeLocals { 0 };
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uint32_t m_numArguments { 0 };
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Vector<Type> m_constantTypes;
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Vector<uint64_t> m_constants;
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std::unique_ptr<InstructionStream> m_instructions;
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const void* m_instructionsRawPointer { nullptr };
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Vector<InstructionStream::Offset> m_jumpTargets;
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Vector<const Signature*> m_signatures;
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OutOfLineJumpTargets m_outOfLineJumpTargets;
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LLIntTierUpCounter m_tierUpCounter;
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Vector<JumpTable> m_jumpTables;
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} } // namespace JSC::Wasm
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#endif // ENABLE(WEBASSEMBLY)
added
removed
Source/JavaScriptCore/wasm/WasmFunctionCodeBlock.h
