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// Copyright 2019 The Chromium Authors
// 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_
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