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58 lines
2.0 KiB
C++
58 lines
2.0 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 <memory>
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#include <stdint.h>
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namespace Luau
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{
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namespace CodeGen
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{
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// The NativeProtoExecData is constant metadata associated with a NativeProto.
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// We generally refer to the NativeProtoExecData via a pointer to the instruction
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// offsets array because this makes the logic in the entry gate simpler.
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class NativeModule;
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struct NativeProtoExecDataHeader
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{
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// The NativeModule that owns this NativeProto. This is initialized
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// when the NativeProto is bound to the NativeModule via assignToModule().
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NativeModule* nativeModule = nullptr;
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// We store the native code offset until the code is allocated in executable
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// pages, after which point we store the actual address.
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const uint8_t* entryOffsetOrAddress = nullptr;
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// The bytecode id of the proto
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uint32_t bytecodeId = 0;
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// The number of bytecode instructions in the proto. This is the number of
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// elements in the instruction offsets array following this header.
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uint32_t bytecodeInstructionCount = 0;
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// The size of the native code for this NativeProto, in bytes.
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size_t nativeCodeSize = 0;
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};
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// Make sure that the instruction offsets array following the header will be
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// correctly aligned:
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static_assert(sizeof(NativeProtoExecDataHeader) % sizeof(uint32_t) == 0);
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struct NativeProtoExecDataDeleter
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{
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void operator()(const uint32_t* instructionOffsets) const noexcept;
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};
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using NativeProtoExecDataPtr = std::unique_ptr<uint32_t[], NativeProtoExecDataDeleter>;
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[[nodiscard]] NativeProtoExecDataPtr createNativeProtoExecData(uint32_t bytecodeInstructionCount);
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void destroyNativeProtoExecData(const uint32_t* instructionOffsets) noexcept;
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[[nodiscard]] NativeProtoExecDataHeader& getNativeProtoExecDataHeader(uint32_t* instructionOffsets) noexcept;
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[[nodiscard]] const NativeProtoExecDataHeader& getNativeProtoExecDataHeader(const uint32_t* instructionOffsets) noexcept;
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} // namespace CodeGen
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} // namespace Luau
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