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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GL_STARTUP_TRACE_H_
#define UI_GL_STARTUP_TRACE_H_
#include <vector>
#include "base/memory/scoped_refptr.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "ui/gl/gl_export.h"
namespace base {
class SequencedTaskRunner;
}
namespace gl {
// This class provides a method to trace the initialization of GPU process. When
// tracing instance is not initialized it will accumulate stages with start and
// end time stamp so they can emit traces once tracing inits. Calling this after
// `StartupDone()` will not add a stage. The caveat is that it cannot know
// before-hand whether the tracing category is on or not so the stage is
// recorded nonetheless.
//
// Example:
// GPU_STARTUP_TRACE_EVENT(__func__);
//
// Note: Currently it's only safe to invoke `GPU_STARTUP_TRACE_EVENT` from the
// gpu main thread between `Startup()` and `StartupDone()`.
class GL_EXPORT StartupTrace {
public:
struct Stage {
const char* name = nullptr;
const base::TimeTicks start;
base::TimeTicks end;
};
class GL_EXPORT ScopedStage {
public:
explicit ScopedStage(size_t size);
~ScopedStage();
private:
size_t size = 0;
};
StartupTrace();
StartupTrace(const StartupTrace&) = delete;
StartupTrace(StartupTrace&&) = delete;
StartupTrace& operator=(const StartupTrace&) = delete;
StartupTrace& operator=(StartupTrace&&) = delete;
~StartupTrace();
static StartupTrace* GetInstance();
ALWAYS_INLINE static bool IsEnabled() {
return startup_in_progress_.load(std::memory_order_acquire);
}
void BindToCurrentThread();
ScopedStage AddStage(const char* name);
// Called by the main thread before/after the tracing.
static void Startup();
static void StarupDone();
private:
void RecordAndClearStages();
static std::atomic<bool> startup_in_progress_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
std::vector<Stage> stages_;
};
} // namespace gl
#define GPU_STARTUP_TRACE_EVENT(name) TRACE_EVENT("gpu,startup", name);
#endif // UI_GL_STARTUP_TRACE_H_
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