base/profiler/thread_delegate_posix.h

   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_POSIX_H_
   6 #define BASE_PROFILER_THREAD_DELEGATE_POSIX_H_
   7
   8 #include <memory>
   9 #include <vector>
  10
  11 #include "base/base_export.h"
  12 #include "base/profiler/sampling_profiler_thread_token.h"
  13 #include "base/profiler/thread_delegate.h"
  14 #include "base/threading/platform_thread.h"
  15
  16 namespace base {
  17
  18 // Platform- and thread-specific implementation in support of stack sampling on
  19 // POSIX.
  20 class BASE_EXPORT ThreadDelegatePosix : public ThreadDelegate {
  21  public:
  22   static std::unique_ptr<ThreadDelegatePosix> Create(
  23       SamplingProfilerThreadToken thread_token);
  24
  25   ~ThreadDelegatePosix() override;
  26
  27   ThreadDelegatePosix(const ThreadDelegatePosix&) = delete;
  28   ThreadDelegatePosix& operator=(const ThreadDelegatePosix&) = delete;
  29
  30   // ThreadDelegate
  31   PlatformThreadId GetThreadId() const override;
  32   uintptr_t GetStackBaseAddress() const override;
  33   std::vector<uintptr_t*> GetRegistersToRewrite(
  34       RegisterContext* thread_context) override;
  35
  36  private:
  37   ThreadDelegatePosix(PlatformThreadId id, uintptr_t base_address);
  38
  39   const PlatformThreadId thread_id_;
  40   const uintptr_t thread_stack_base_address_;
  41 };
  42
  43 }  // namespace base
  44
  45 #endif  // BASE_PROFILER_THREAD_DELEGATE_POSIX_H_