| /* |
| * 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 <stdint.h> |
| |
| #include <optional> |
| #include <string> |
| #include <unordered_map> |
| |
| namespace unwindstack { |
| |
| // Forward declaration. |
| class Memory; |
| |
| class Symbols { |
| struct Info { |
| uint64_t addr; // Symbol address. |
| uint32_t size; // Symbol size in bytes. Zero if not a function. |
| uint32_t name; // Offset in .strtab. |
| }; |
| |
| public: |
| Symbols(uint64_t offset, uint64_t size, uint64_t entry_size, uint64_t str_offset, |
| uint64_t str_size); |
| virtual ~Symbols() = default; |
| |
| template <typename SymType> |
| bool GetName(uint64_t addr, Memory* elf_memory, std::string* name, uint64_t* func_offset); |
| |
| template <typename SymType> |
| bool GetGlobal(Memory* elf_memory, const std::string& name, uint64_t* memory_address); |
| |
| void ClearCache() { |
| symbols_.clear(); |
| remap_.reset(); |
| } |
| |
| private: |
| template <typename SymType> |
| const Info* ReadFuncInfo(uint32_t symbol_index, Memory* elf_memory); |
| |
| template <typename SymType, bool RemapIndices> |
| const Info* BinarySearch(uint64_t addr, Memory* elf_memory); |
| |
| template <typename SymType> |
| 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::unordered_map<uint32_t, Info> symbols_; // Cache of read symbols (keyed by symbol index). |
| std::optional<std::vector<uint32_t>> remap_; // Indices of function symbols sorted by address. |
| }; |
| |
| } // namespace unwindstack |
| |
| #endif // _LIBUNWINDSTACK_SYMBOLS_H |