74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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/*
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* Copyright (C) 2016 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 _LIBUNWINDSTACK_SYMBOLS_H
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#define _LIBUNWINDSTACK_SYMBOLS_H
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#include <stdint.h>
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#include <map>
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#include <optional>
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#include <string>
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namespace unwindstack {
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// Forward declaration.
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class Memory;
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class Symbols {
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struct Info {
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uint64_t addr; // Symbol address.
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uint32_t index; // Index into *sorted* symbol table.
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uint32_t name; // Offset in .strtab, or 0 if the symbol is not a function.
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};
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public:
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Symbols(uint64_t offset, uint64_t size, uint64_t entry_size, uint64_t str_offset,
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uint64_t str_size);
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virtual ~Symbols() = default;
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template <typename SymType>
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bool GetName(uint64_t addr, Memory* elf_memory, std::string* name, uint64_t* func_offset);
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template <typename SymType>
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bool GetGlobal(Memory* elf_memory, const std::string& name, uint64_t* memory_address);
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void ClearCache() {
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symbols_.clear();
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remap_.reset();
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}
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private:
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template <typename SymType, bool RemapIndices>
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const Info* BinarySearch(uint64_t addr, Memory* elf_memory);
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template <typename SymType>
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void BuildRemapTable(Memory* elf_memory);
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const uint64_t offset_;
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const uint64_t count_;
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const uint64_t entry_size_;
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const uint64_t str_offset_;
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const uint64_t str_end_;
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std::map<uint64_t, Info> symbols_; // Cache of read symbols (keyed by function *end* address).
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std::optional<std::vector<uint32_t>> remap_; // Indices of function symbols sorted by address.
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};
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} // namespace unwindstack
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#endif // _LIBUNWINDSTACK_SYMBOLS_H
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