base/profiler/frame_pointer_unwinder.h

   1 // Copyright 2021 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_FRAME_POINTER_UNWINDER_H_
   6 #define BASE_PROFILER_FRAME_POINTER_UNWINDER_H_
   7
   8 #include <vector>
   9
  10 #include "base/base_export.h"
  11 #include "base/profiler/unwinder.h"
  12 #include "build/build_config.h"
  13
  14 #if BUILDFLAG(IS_APPLE)
  15 #include <os/availability.h>
  16 #endif
  17
  18 namespace base {
  19
  20 // Native unwinder implementation for platforms that have frame pointers:
  21 //  * iOS, ARM64 and X86_64,
  22 //  * macOS
  23 //  * ChromeOS X86_64
  24 class BASE_EXPORT
  25 #if BUILDFLAG(IS_APPLE)
  26 API_AVAILABLE(ios(12))
  27 #endif
  28     FramePointerUnwinder : public Unwinder {
  29  public:
  30   FramePointerUnwinder();
  31
  32   FramePointerUnwinder(const FramePointerUnwinder&) = delete;
  33   FramePointerUnwinder& operator=(const FramePointerUnwinder&) = delete;
  34
  35   // Unwinder:
  36   bool CanUnwindFrom(const Frame& current_frame) const override;
  37   UnwindResult TryUnwind(RegisterContext* thread_context,
  38                          uintptr_t stack_top,
  39                          std::vector<Frame>* stack) override;
  40 };
  41
  42 }  // namespace base
  43
  44 #endif  // BASE_PROFILER_FRAME_POINTER_UNWINDER_H_