/* * Copyright (C) 2016 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef _LIBUNWINDSTACK_SYMBOLS_H #define _LIBUNWINDSTACK_SYMBOLS_H #include #include #include #include namespace unwindstack { // Forward declaration. class Memory; class Symbols { struct Info { uint64_t addr; // Symbol address. uint32_t index; // Index into *sorted* symbol table. uint32_t name; // Offset in .strtab, or 0 if the symbol is not a function. }; public: Symbols(uint64_t offset, uint64_t size, uint64_t entry_size, uint64_t str_offset, uint64_t str_size); virtual ~Symbols() = default; template bool GetName(uint64_t addr, Memory* elf_memory, std::string* name, uint64_t* func_offset); template bool GetGlobal(Memory* elf_memory, const std::string& name, uint64_t* memory_address); void ClearCache() { symbols_.clear(); remap_.reset(); } private: template const Info* BinarySearch(uint64_t addr, Memory* elf_memory); template void BuildRemapTable(Memory* elf_memory); const uint64_t offset_; const uint64_t count_; const uint64_t entry_size_; const uint64_t str_offset_; const uint64_t str_end_; std::map symbols_; // Cache of read symbols (keyed by function *end* address). std::optional> remap_; // Indices of function symbols sorted by address. }; } // namespace unwindstack #endif // _LIBUNWINDSTACK_SYMBOLS_H