1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SIMPLE_PERF_READ_ELF_H_ 18 #define SIMPLE_PERF_READ_ELF_H_ 19 20 #include <functional> 21 #include <string> 22 #include "build_id.h" 23 24 bool GetBuildIdFromNoteFile(const std::string& filename, BuildId* build_id); 25 bool GetBuildIdFromElfFile(const std::string& filename, BuildId* build_id); 26 bool GetBuildIdFromEmbeddedElfFile(const std::string& filename, uint64_t file_offset, 27 uint32_t file_size, BuildId* build_id); 28 29 // The symbol prefix used to indicate that the symbol belongs to android linker. 30 static const std::string linker_prefix = "__dl_"; 31 32 struct ElfFileSymbol { 33 uint64_t vaddr; 34 uint64_t len; 35 bool is_func; 36 bool is_label; 37 bool is_in_text_section; 38 std::string name; 39 ElfFileSymbolElfFileSymbol40 ElfFileSymbol() : vaddr(0), len(0), is_func(false), is_label(false), is_in_text_section(false) { 41 } 42 }; 43 44 bool ParseSymbolsFromElfFile(const std::string& filename, const BuildId& expected_build_id, 45 std::function<void(const ElfFileSymbol&)> callback); 46 bool ParseSymbolsFromEmbeddedElfFile(const std::string& filename, uint64_t file_offset, 47 uint32_t file_size, const BuildId& expected_build_id, 48 std::function<void(const ElfFileSymbol&)> callback); 49 50 bool ReadMinExecutableVirtualAddressFromElfFile(const std::string& filename, 51 const BuildId& expected_build_id, 52 uint64_t* min_addr); 53 54 bool ReadSectionFromElfFile(const std::string& filename, const std::string& section_name, 55 std::string* content); 56 57 // Expose the following functions for unit tests. 58 bool IsArmMappingSymbol(const char* name); 59 bool IsValidElfFile(int fd); 60 bool IsValidElfPath(const std::string& filename); 61 62 #endif // SIMPLE_PERF_READ_ELF_H_ 63