153 lines
3.9 KiB
C++
153 lines
3.9 KiB
C++
/*
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* Copyright 2011-2012, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ANDROID_BCINFO_BITCODEWRAPPER_H__
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#define __ANDROID_BCINFO_BITCODEWRAPPER_H__
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#include "bcinfo/Wrap/BCHeaderField.h"
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#include <cstddef>
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#include <stdint.h>
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namespace bcinfo {
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struct AndroidBitcodeWrapper {
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uint32_t Magic;
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uint32_t Version;
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uint32_t BitcodeOffset;
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uint32_t BitcodeSize;
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uint32_t HeaderVersion;
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uint32_t TargetAPI;
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uint32_t PNaClVersion;
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uint16_t CompilerVersionTag;
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uint16_t CompilerVersionLen;
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uint32_t CompilerVersion;
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uint16_t OptimizationLevelTag;
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uint16_t OptimizationLevelLen;
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uint32_t OptimizationLevel;
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};
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enum BCFileType {
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BC_NOT_BC = 0,
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BC_WRAPPER = 1,
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BC_RAW = 2
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};
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class BitcodeWrapper {
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private:
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enum BCFileType mFileType;
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const char *mBitcode;
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size_t mBitcodeSize;
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uint32_t mHeaderVersion;
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uint32_t mTargetAPI;
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uint32_t mCompilerVersion;
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uint32_t mOptimizationLevel;
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public:
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/**
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* Reads wrapper information from \p bitcode.
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*
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* \param bitcode - input bitcode string.
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* \param bitcodeSize - length of \p bitcode string (in bytes).
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*/
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BitcodeWrapper(const char *bitcode, size_t bitcodeSize);
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~BitcodeWrapper();
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/**
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* Attempt to unwrap the target bitcode. This function is \deprecated.
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*
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* \return true on success and false if an error occurred.
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*/
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bool unwrap();
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/**
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* \return type of bitcode file.
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*/
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enum BCFileType getBCFileType() const {
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return mFileType;
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}
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/**
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* \return header version of bitcode wrapper.
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*/
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uint32_t getHeaderVersion() const {
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return mHeaderVersion;
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}
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/**
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* \return target API version for this bitcode.
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*/
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uint32_t getTargetAPI() const {
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return mTargetAPI;
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}
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/**
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* \return compiler version that generated this bitcode.
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*/
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uint32_t getCompilerVersion() const {
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return mCompilerVersion;
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}
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/**
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* \return compiler optimization level for this bitcode.
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*/
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uint32_t getOptimizationLevel() const {
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return mOptimizationLevel;
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}
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};
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/**
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* Helper function to emit just the bitcode wrapper returning the number of
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* bytes that were written.
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*
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* \param wrapper - where to write header information into.
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* \param bitcodeSize - size of bitcode in bytes.
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* \param targetAPI - target API version for this bitcode.
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* \param compilerVersion - compiler version that generated this bitcode.
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* \param optimizationLevel - compiler optimization level for this bitcode.
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*
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* \return number of wrapper bytes written into the \p buffer.
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*/
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static inline size_t writeAndroidBitcodeWrapper(AndroidBitcodeWrapper *wrapper,
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size_t bitcodeSize, uint32_t targetAPI, uint32_t compilerVersion,
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uint32_t optimizationLevel) {
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if (!wrapper) {
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return 0;
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}
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wrapper->Magic = 0x0B17C0DE;
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wrapper->Version = 0;
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wrapper->BitcodeOffset = sizeof(*wrapper);
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wrapper->BitcodeSize = bitcodeSize;
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wrapper->HeaderVersion = 0;
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wrapper->TargetAPI = targetAPI;
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wrapper->PNaClVersion = 0;
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wrapper->CompilerVersionTag = BCHeaderField::kAndroidCompilerVersion;
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wrapper->CompilerVersionLen = 4;
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wrapper->CompilerVersion = compilerVersion;
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wrapper->OptimizationLevelTag = BCHeaderField::kAndroidOptimizationLevel;
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wrapper->OptimizationLevelLen = 4;
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wrapper->OptimizationLevel = optimizationLevel;
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return sizeof(*wrapper);
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}
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} // namespace bcinfo
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#endif // __ANDROID_BCINFO_BITCODEWRAPPER_H__
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