| // Copyright 2019 The Chromium 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 BASE_PROFILER_CHROME_UNWINDER_ANDROID_H_ |
| #define BASE_PROFILER_CHROME_UNWINDER_ANDROID_H_ |
| |
| #include "base/profiler/unwinder.h" |
| |
| #include "base/base_export.h" |
| #include "base/optional.h" |
| #include "base/profiler/arm_cfi_table.h" |
| #include "base/profiler/module_cache.h" |
| #include "base/profiler/register_context.h" |
| |
| namespace base { |
| |
| // Chrome unwinder implementation for Android, using ArmCfiTable. |
| class BASE_EXPORT ChromeUnwinderAndroid : public Unwinder { |
| public: |
| ChromeUnwinderAndroid(const ArmCFITable* cfi_table, |
| uintptr_t chrome_module_base_address); |
| ~ChromeUnwinderAndroid() override; |
| ChromeUnwinderAndroid(const ChromeUnwinderAndroid&) = delete; |
| ChromeUnwinderAndroid& operator=(const ChromeUnwinderAndroid&) = delete; |
| |
| // Unwinder: |
| bool CanUnwindFrom(const Frame& current_frame) const override; |
| UnwindResult TryUnwind(RegisterContext* thread_context, |
| uintptr_t stack_top, |
| std::vector<Frame>* stack) const override; |
| |
| static bool StepForTesting(RegisterContext* thread_context, |
| uintptr_t stack_top, |
| const ArmCFITable::FrameEntry& entry) { |
| return Step(thread_context, stack_top, entry); |
| } |
| |
| private: |
| static bool Step(RegisterContext* thread_context, |
| uintptr_t stack_top, |
| const ArmCFITable::FrameEntry& entry); |
| // Fallback setp that attempts to use lr as return address. |
| static bool StepUsingLrRegister(RegisterContext* thread_context, |
| uintptr_t stack_top); |
| |
| const ArmCFITable* cfi_table_; |
| const uintptr_t chrome_module_base_address_; |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_PROFILER_CHROME_UNWINDER_ANDROID_H_ |