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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_SUSPENDABLE_THREAD_DELEGATE_MAC_H_
#define BASE_PROFILER_SUSPENDABLE_THREAD_DELEGATE_MAC_H_
#include <mach/mach.h>
#include "base/base_export.h"
#include "base/profiler/module_cache.h"
#include "base/profiler/native_unwinder_mac.h"
#include "base/profiler/sampling_profiler_thread_token.h"
#include "base/profiler/suspendable_thread_delegate.h"
#include "base/threading/platform_thread.h"
namespace base {
// Platform- and thread-specific implementation in support of stack sampling on
// Mac.
class BASE_EXPORT SuspendableThreadDelegateMac
: public SuspendableThreadDelegate {
public:
class ScopedSuspendThread
: public SuspendableThreadDelegate::ScopedSuspendThread {
public:
explicit ScopedSuspendThread(mach_port_t thread_port);
~ScopedSuspendThread() override;
ScopedSuspendThread(const ScopedSuspendThread&) = delete;
ScopedSuspendThread& operator=(const ScopedSuspendThread&) = delete;
bool WasSuccessful() const override;
private:
mach_port_t thread_port_;
};
SuspendableThreadDelegateMac(SamplingProfilerThreadToken thread_token);
~SuspendableThreadDelegateMac() override;
SuspendableThreadDelegateMac(const SuspendableThreadDelegateMac&) = delete;
SuspendableThreadDelegateMac& operator=(const SuspendableThreadDelegateMac&) =
delete;
// SuspendableThreadDelegate
std::unique_ptr<SuspendableThreadDelegate::ScopedSuspendThread>
CreateScopedSuspendThread() override;
bool GetThreadContext(x86_thread_state64_t* thread_context) override;
PlatformThreadId GetThreadId() const override;
uintptr_t GetStackBaseAddress() const override;
bool CanCopyStack(uintptr_t stack_pointer) override;
std::vector<uintptr_t*> GetRegistersToRewrite(
x86_thread_state64_t* thread_context) override;
private:
// Weak reference: Mach port for thread being profiled.
const mach_port_t thread_port_;
// The stack base address corresponding to |thread_port_|.
const uintptr_t thread_stack_base_address_;
};
} // namespace base
#endif // BASE_PROFILER_SUSPENDABLE_THREAD_DELEGATE_MAC_H_