1 // Copyright 2019 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_PROFILER_THREAD_DELEGATE_H_ 6 #define BASE_PROFILER_THREAD_DELEGATE_H_ 7 8 #include <vector> 9 10 #include "base/base_export.h" 11 #include "base/profiler/register_context.h" 12 #include "base/threading/platform_thread.h" 13 14 namespace base { 15 16 // Platform-specific thread and stack manipulation delegate, for use by the 17 // platform-independent stack copying/walking implementation in 18 // StackSamplerImpl. Provides the common interface across signal- and 19 // suspend-based stack copy implementations. 20 class BASE_EXPORT ThreadDelegate { 21 public: 22 ThreadDelegate() = default; 23 virtual ~ThreadDelegate() = default; 24 25 ThreadDelegate(const ThreadDelegate&) = delete; 26 ThreadDelegate& operator=(const ThreadDelegate&) = delete; 27 28 // Gets the platform-specific id for the thread. 29 virtual PlatformThreadId GetThreadId() const = 0; 30 31 // Gets the base address of the thread's stack. 32 virtual uintptr_t GetStackBaseAddress() const = 0; 33 34 // Returns a list of registers that should be rewritten to point into the 35 // stack copy, if they originally pointed into the original stack. 36 // May heap allocate. 37 virtual std::vector<uintptr_t*> GetRegistersToRewrite( 38 RegisterContext* thread_context) = 0; 39 }; 40 41 } // namespace base 42 43 #endif // BASE_PROFILER_THREAD_DELEGATE_H_ 44