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82 lines
3.1 KiB
82 lines
3.1 KiB
/* |
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* Copyright (C) 2015 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 SIMPLE_PERF_READ_ELF_H_ |
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#define SIMPLE_PERF_READ_ELF_H_ |
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#include <functional> |
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#include <ostream> |
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#include <string> |
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#include "build_id.h" |
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// Read ELF functions are called in different situations, so it is hard to |
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// decide whether to report error or not. So read ELF functions don't report |
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// error when something wrong happens, instead they return ElfStatus, which |
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// identifies different errors met while reading elf file. |
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enum ElfStatus { |
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NO_ERROR, |
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FILE_NOT_FOUND, |
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READ_FAILED, |
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FILE_MALFORMED, |
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NO_SYMBOL_TABLE, |
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NO_BUILD_ID, |
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BUILD_ID_MISMATCH, |
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SECTION_NOT_FOUND, |
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}; |
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std::ostream& operator<<(std::ostream& os, const ElfStatus& status); |
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ElfStatus GetBuildIdFromNoteFile(const std::string& filename, BuildId* build_id); |
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ElfStatus GetBuildIdFromElfFile(const std::string& filename, BuildId* build_id); |
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ElfStatus GetBuildIdFromEmbeddedElfFile(const std::string& filename, uint64_t file_offset, |
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uint32_t file_size, BuildId* build_id); |
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// The symbol prefix used to indicate that the symbol belongs to android linker. |
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static const std::string linker_prefix = "__dl_"; |
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struct ElfFileSymbol { |
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uint64_t vaddr; |
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uint64_t len; |
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bool is_func; |
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bool is_label; |
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bool is_in_text_section; |
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std::string name; |
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ElfFileSymbol() : vaddr(0), len(0), is_func(false), is_label(false), is_in_text_section(false) { |
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} |
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}; |
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ElfStatus ParseSymbolsFromElfFile(const std::string& filename, |
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const BuildId& expected_build_id, |
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const std::function<void(const ElfFileSymbol&)>& callback); |
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ElfStatus ParseSymbolsFromEmbeddedElfFile(const std::string& filename, uint64_t file_offset, |
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uint32_t file_size, const BuildId& expected_build_id, |
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const std::function<void(const ElfFileSymbol&)>& callback); |
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ElfStatus ReadMinExecutableVirtualAddressFromElfFile(const std::string& filename, |
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const BuildId& expected_build_id, |
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uint64_t* min_addr); |
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ElfStatus ReadSectionFromElfFile(const std::string& filename, const std::string& section_name, |
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std::string* content); |
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// Expose the following functions for unit tests. |
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bool IsArmMappingSymbol(const char* name); |
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ElfStatus IsValidElfFile(int fd); |
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ElfStatus IsValidElfPath(const std::string& filename); |
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bool GetBuildIdFromNoteSection(const char* section, size_t section_size, BuildId* build_id); |
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#endif // SIMPLE_PERF_READ_ELF_H_
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