| /* |
| * 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 <map> |
| #include <optional> |
| #include <string> |
| #include <unordered_map> |
| |
| #include <unwindstack/SharedString.h> |
| |
| namespace unwindstack { |
| |
| // Forward declaration. |
| class Memory; |
| |
| class Symbols { |
| struct Info { |
| uint32_t size; // Symbol size in bytes. |
| uint32_t index; // Index into *sorted* symbol table. |
| SharedString name; |
| }; |
| |
| 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, SharedString* 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, bool RemapIndices> |
| Info* BinarySearch(uint64_t addr, Memory* elf_memory, uint64_t* func_offset); |
| |
| 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::map<uint64_t, Info> symbols_; // Cache of read symbols (keyed by function *end* address). |
| std::optional<std::vector<uint32_t>> remap_; // Indices of function symbols sorted by address. |
| |
| // Cache of global data (non-function) symbols. |
| std::unordered_map<std::string, std::optional<uint64_t>> global_variables_; |
| }; |
| |
| } // namespace unwindstack |
| |
| #endif // _LIBUNWINDSTACK_SYMBOLS_H |