1 files changed, 60 insertions, 0 deletions
diff --git a/chromium/base/profiler/suspendable_thread_delegate_win.h b/chromium/base/profiler/suspendable_thread_delegate_win.h
new file mode 100644
index 00000000000..2452dbe47db
--- /dev/null
+++ b/chromium/base/profiler/suspendable_thread_delegate_win.h
@@ -0,0 +1,60 @@
+// 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_SUSPENDABLE_THREAD_DELEGATE_WIN_H_
+#define BASE_PROFILER_SUSPENDABLE_THREAD_DELEGATE_WIN_H_
+
+#include <windows.h>
+
+#include "base/base_export.h"
+#include "base/profiler/suspendable_thread_delegate.h"
+#include "base/threading/platform_thread.h"
+#include "base/win/scoped_handle.h"
+
+namespace base {
+
+// Platform- and thread-specific implementation in support of stack sampling on
+// Windows.
+class BASE_EXPORT SuspendableThreadDelegateWin
+    : public SuspendableThreadDelegate {
+ public:
+  class ScopedSuspendThread
+      : public SuspendableThreadDelegate::ScopedSuspendThread {
+   public:
+    explicit ScopedSuspendThread(HANDLE thread_handle);
+    ~ScopedSuspendThread() override;
+
+    bool WasSuccessful() const override;
+
+   private:
+    HANDLE thread_handle_;
+    bool was_successful_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedSuspendThread);
+  };
+
+  explicit SuspendableThreadDelegateWin(PlatformThreadId thread_id);
+  ~SuspendableThreadDelegateWin() override;
+
+  SuspendableThreadDelegateWin(const SuspendableThreadDelegateWin&) = delete;
+  SuspendableThreadDelegateWin& operator=(const SuspendableThreadDelegateWin&) =
+      delete;
+
+  // SuspendableThreadDelegate
+  std::unique_ptr<SuspendableThreadDelegate::ScopedSuspendThread>
+  CreateScopedSuspendThread() override;
+  bool GetThreadContext(CONTEXT* thread_context) override;
+  uintptr_t GetStackBaseAddress() const override;
+  bool CanCopyStack(uintptr_t stack_pointer) override;
+  std::vector<uintptr_t*> GetRegistersToRewrite(
+      CONTEXT* thread_context) override;
+
+ private:
+  win::ScopedHandle thread_handle_;
+  const uintptr_t thread_stack_base_address_;
+};
+
+}  // namespace base
+
+#endif  // BASE_PROFILER_SUSPENDABLE_THREAD_DELEGATE_WIN_H_