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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 THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PROFILER_GROUP_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PROFILER_GROUP_H_
#include "base/time/time.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/execution_context/security_context.h"
#include "third_party/blink/renderer/platform/bindings/v8_per_isolate_data.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "v8/include/v8-profiler.h"
#include "v8/include/v8.h"
namespace blink {
class ExceptionState;
class ExecutionContext;
class LocalDOMWindow;
class Profiler;
class ProfilerInitOptions;
class ProfilerTrace;
class ScriptState;
// A ProfilerGroup represents a set of profilers sharing an underlying
// v8::CpuProfiler attached to a common isolate.
class CORE_EXPORT ProfilerGroup : public V8PerIsolateData::UserData {
public:
// Determines whether or not the given frame can profile. Logs an exception
// in the given ExceptionState (if non-null) if profiling is not permitted,
// and returns false.
static bool CanProfile(LocalDOMWindow*,
ExceptionState* = nullptr,
ReportOptions = ReportOptions::kDoNotReport);
// Initializes logging for the given LocalDOMWindow if CanProfile returns
// true.
static void InitializeIfEnabled(LocalDOMWindow*);
static ProfilerGroup* From(v8::Isolate*);
static base::TimeDelta GetBaseSampleInterval();
ProfilerGroup(v8::Isolate* isolate);
ProfilerGroup(const ProfilerGroup&) = delete;
ProfilerGroup& operator=(const ProfilerGroup&) = delete;
~ProfilerGroup() override;
Profiler* CreateProfiler(ScriptState* script_state,
const ProfilerInitOptions&,
base::TimeTicks time_origin,
ExceptionState&);
// Tracks a profiling-enabled document's lifecycle, ensuring that the
// profiler is ready during its lifetime.
void OnProfilingContextAdded(ExecutionContext* context);
void DispatchSampleBufferFullEvent(String profiler_id);
void WillBeDestroyed() override;
void Trace(Visitor*) const override;
private:
friend class Profiler;
class ProfilingContextObserver;
void OnProfilingContextDestroyed(ProfilingContextObserver*);
void InitV8Profiler();
void TeardownV8Profiler();
void StopProfiler(ScriptState*,
Profiler*,
ScriptPromiseResolver<ProfilerTrace>*);
// Cancels a profiler, discarding its associated trace.
void CancelProfiler(Profiler*);
// Asynchronously cancels a profiler. Invoked on Profiler destruction.
void CancelProfilerAsync(ScriptState*, Profiler*);
// Internal implementation of cancel.
void CancelProfilerImpl(String profiler_id);
// Clean context independent resources for leaked profilers
void StopDetachedProfiler(String profiler_id);
void StopDetachedProfilers();
// Generates an unused string identifier to use for a new profiling session.
String NextProfilerId();
v8::Isolate* const isolate_;
v8::CpuProfiler* cpu_profiler_;
int next_profiler_id_;
int num_active_profilers_;
HeapHashSet<WeakMember<Profiler>> profilers_;
// Store the ids of leaked collected profilers that needs to be stopped
Vector<String> detached_profiler_ids_;
// A set of observers, one for each ExecutionContext that has profiling
// enabled.
HeapHashSet<Member<ProfilingContextObserver>> context_observers_;
};
class DiscardedSamplesDelegate : public v8::DiscardedSamplesDelegate {
public:
explicit DiscardedSamplesDelegate(ProfilerGroup* profiler_group,
String profiler_id)
: profiler_group_(profiler_group), profiler_id_(profiler_id) {}
void Notify() override;
private:
// It is important to keep a weak reference to the profiler group
// because Notify may be invoked after profiling stops and ProfilerGroup dies.
WeakPersistent<ProfilerGroup> profiler_group_;
const String profiler_id_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PROFILER_GROUP_H_
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