Repo created

TMessagesProj/jni/voip/webrtc/base/profiler/thread_delegate.h

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+// 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_THREAD_DELEGATE_H_
+#define BASE_PROFILER_THREAD_DELEGATE_H_
+
+#include <vector>
+
+#include "base/base_export.h"
+#include "base/profiler/register_context.h"
+#include "base/threading/platform_thread.h"
+
+namespace base {
+
+// Platform-specific thread and stack manipulation delegate, for use by the
+// platform-independent stack copying/walking implementation in
+// StackSamplerImpl. Provides the common interface across signal- and
+// suspend-based stack copy implementations.
+class BASE_EXPORT ThreadDelegate {
+ public:
+  ThreadDelegate() = default;
+  virtual ~ThreadDelegate() = default;
+
+  ThreadDelegate(const ThreadDelegate&) = delete;
+  ThreadDelegate& operator=(const ThreadDelegate&) = delete;
+
+  // Gets the platform-specific id for the thread.
+  virtual PlatformThreadId GetThreadId() const = 0;
+
+  // Gets the base address of the thread's stack.
+  virtual uintptr_t GetStackBaseAddress() const = 0;
+
+  // Returns a list of registers that should be rewritten to point into the
+  // stack copy, if they originally pointed into the original stack.
+  // May heap allocate.
+  virtual std::vector<uintptr_t*> GetRegistersToRewrite(
+      RegisterContext* thread_context) = 0;
+};
+
+}  // namespace base
+
+#endif  // BASE_PROFILER_THREAD_DELEGATE_H_