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59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#pragma once
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#include "Luau/RegisterX64.h"
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#include "UnwindBuilder.h"
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#include <vector>
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namespace Luau
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{
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namespace CodeGen
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{
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struct UnwindFunctionDwarf2
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{
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uint32_t beginOffset;
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uint32_t endOffset;
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uint32_t fdeEntryStartPos;
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};
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class UnwindBuilderDwarf2 : public UnwindBuilder
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{
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public:
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void setBeginOffset(size_t beginOffset) override;
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size_t getBeginOffset() const override;
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void startInfo() override;
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void startFunction() override;
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void spill(int espOffset, X64::RegisterX64 reg) override;
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void save(X64::RegisterX64 reg) override;
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void allocStack(int size) override;
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void setupFrameReg(X64::RegisterX64 reg, int espOffset) override;
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void finishFunction(uint32_t beginOffset, uint32_t endOffset) override;
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void finishInfo() override;
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size_t getSize() const override;
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size_t getFunctionCount() const override;
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void finalize(char* target, size_t offset, void* funcAddress, size_t funcSize) const override;
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private:
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size_t beginOffset = 0;
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std::vector<UnwindFunctionDwarf2> unwindFunctions;
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static const unsigned kRawDataLimit = 1024;
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uint8_t rawData[kRawDataLimit];
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uint8_t* pos = rawData;
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uint32_t stackOffset = 0;
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// We will remember the FDE location to write some of the fields like entry length, function start and size later
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uint8_t* fdeEntryStart = nullptr;
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};
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} // namespace CodeGen
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} // namespace Luau
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