| // Copyright 2023 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_LIB_UNWINDER_CFI_UNWINDER_H_ |
| #define SRC_LIB_UNWINDER_CFI_UNWINDER_H_ |
| |
| #include <cstdint> |
| #include <map> |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "src/lib/unwinder/cfi_module.h" |
| #include "src/lib/unwinder/memory.h" |
| #include "src/lib/unwinder/module.h" |
| #include "src/lib/unwinder/registers.h" |
| |
| namespace unwinder { |
| |
| class CfiUnwinder { |
| public: |
| explicit CfiUnwinder(const std::vector<Module>& modules); |
| |
| // |is_return_address| indicates whether the current PC is pointing to a return address, |
| // in which case it'll be adjusted to find the correct CFI entry. |
| Error Step(Memory* stack, Registers current, Registers& next, bool is_return_address); |
| |
| // For other unwinders that want to check whether a value looks like a valid PC. |
| bool IsValidPC(uint64_t pc); |
| |
| Error GetCfiModuleFor(uint64_t pc, CfiModule** out); |
| |
| private: |
| // Mapping from module load addresses to a pair of (module description, lazily-initialized CFI). |
| std::map<uint64_t, std::pair<Module, std::unique_ptr<CfiModule>>> module_map_; |
| }; |
| |
| } // namespace unwinder |
| |
| #endif // SRC_LIB_UNWINDER_CFI_UNWINDER_H_ |