Wire up the Inspector V8 Debugger

sky/engine/core/inspector/AsyncCallStackTracker.h

+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef AsyncCallStackTracker_h
+#define AsyncCallStackTracker_h
+
+#include "bindings/core/v8/ScriptValue.h"
+#include "core/dom/ContextLifecycleObserver.h"
+#include "wtf/Deque.h"
+#include "wtf/HashMap.h"
+#include "wtf/HashSet.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
+
+namespace blink {
+
+class Event;
+class EventListener;
+class EventTarget;
+class ExecutionContext;
+class MutationObserver;
+
+class AsyncCallStackTracker FINAL {

[yurys, 2014/11/14 07:38:31]

Given that you tend to write DOM in JS, Sky will likely have a different
implementation of async stacks. Anyways, I guess it is easier to just restore
all dependencies of the debugger agent now and clean up them later.

[abarth-chromium, 2014/11/14 08:00:57]

It depends what you mean by DOM.  We're not planning to move Node to JS.  Just
almost all the subclasses of Element.

+    WTF_MAKE_NONCOPYABLE(AsyncCallStackTracker);
+public:
+    class AsyncCallStack FINAL : public RefCounted<AsyncCallStack> {
+    public:
+        AsyncCallStack(const String&, const ScriptValue&);
+        ~AsyncCallStack();
+        String description() const { return m_description; }
+        ScriptValue callFrames() const { return m_callFrames; }
+    private:
+        String m_description;
+        ScriptValue m_callFrames;
+    };
+
+    typedef Deque<RefPtr<AsyncCallStack>, 4> AsyncCallStackVector;
+
+    class AsyncCallChain FINAL : public RefCounted<AsyncCallChain> {
+    public:
+        AsyncCallChain() { }
+        AsyncCallChain(const AsyncCallChain& t) : m_callStacks(t.m_callStacks) { }
+        AsyncCallStackVector callStacks() const { return m_callStacks; }
+    private:
+        friend class AsyncCallStackTracker;
+        AsyncCallStackVector m_callStacks;
+    };
+
+    class ExecutionContextData FINAL : public ContextLifecycleObserver {
+        WTF_MAKE_FAST_ALLOCATED;
+    public:
+        ExecutionContextData(AsyncCallStackTracker* tracker, ExecutionContext* executionContext)
+            : ContextLifecycleObserver(executionContext)
+            , m_circularSequentialID(0)
+            , m_tracker(tracker)
+        {
+        }
+
+        virtual void contextDestroyed() override;
+
+        int circularSequentialID();
+
+    private:
+        int m_circularSequentialID;
+
+    public:
+        RawPtr<AsyncCallStackTracker> m_tracker;
+        HashSet<int> m_intervalTimerIds;
+        HashMap<int, RefPtr<AsyncCallChain> > m_timerCallChains;
+        HashMap<int, RefPtr<AsyncCallChain> > m_animationFrameCallChains;
+        HashMap<RawPtr<Event>, RefPtr<AsyncCallChain> > m_eventCallChains;
+        HashMap<RawPtr<MutationObserver>, RefPtr<AsyncCallChain> > m_mutationObserverCallChains;
+        //HashMap<ExecutionContextTask*, RefPtr<AsyncCallChain> > m_executionContextTaskCallChains;
+        HashMap<String, RefPtr<AsyncCallChain> > m_v8AsyncTaskCallChains;
+        HashMap<int, RefPtr<AsyncCallChain> > m_asyncOperationCallChains;
+    };
+
+    AsyncCallStackTracker();
+
+    bool isEnabled() const { return m_maxAsyncCallStackDepth; }
+    void setAsyncCallStackDepth(int);
+    const AsyncCallChain* currentAsyncCallChain() const;
+
+    void didInstallTimer(ExecutionContext*, int timerId, bool singleShot, const ScriptValue& callFrames);
+    void didRemoveTimer(ExecutionContext*, int timerId);
+    void willFireTimer(ExecutionContext*, int timerId);
+
+    void didRequestAnimationFrame(ExecutionContext*, int callbackId, const ScriptValue& callFrames);
+    void didCancelAnimationFrame(ExecutionContext*, int callbackId);
+    void willFireAnimationFrame(ExecutionContext*, int callbackId);
+
+    void didEnqueueEvent(EventTarget*, Event*, const ScriptValue& callFrames);
+    void didRemoveEvent(EventTarget*, Event*);
+    void willHandleEvent(EventTarget*, Event*, EventListener*, bool useCapture);
+
+    void didEnqueueMutationRecord(ExecutionContext*, MutationObserver*, const ScriptValue& callFrames);
+    bool hasEnqueuedMutationRecord(ExecutionContext*, MutationObserver*);
+    void didClearAllMutationRecords(ExecutionContext*, MutationObserver*);
+    void willDeliverMutationRecords(ExecutionContext*, MutationObserver*);
+
+    // void didPostExecutionContextTask(ExecutionContext*, ExecutionContextTask*, const ScriptValue& callFrames);
+    // void didKillAllExecutionContextTasks(ExecutionContext*);
+    // void willPerformExecutionContextTask(ExecutionContext*, ExecutionContextTask*);
+
+    void didEnqueueV8AsyncTask(ExecutionContext*, const String& eventName, int id, const ScriptValue& callFrames);
+    void willHandleV8AsyncTask(ExecutionContext*, const String& eventName, int id);
+
+    int traceAsyncOperationStarting(ExecutionContext*, const String& operationName, const ScriptValue& callFrames);
+    void traceAsyncOperationCompleted(ExecutionContext*, int operationId);
+    void traceAsyncCallbackStarting(ExecutionContext*, int operationId);
+
+    void didFireAsyncCall();
+    void clear();
+
+private:
+    PassRefPtr<AsyncCallChain> createAsyncCallChain(const String& description, const ScriptValue& callFrames);
+    void setCurrentAsyncCallChain(ExecutionContext*, PassRefPtr<AsyncCallChain>);
+    void clearCurrentAsyncCallChain();
+    static void ensureMaxAsyncCallChainDepth(AsyncCallChain*, unsigned);
+    bool validateCallFrames(const ScriptValue& callFrames);
+
+    ExecutionContextData* createContextDataIfNeeded(ExecutionContext*);
+
+    unsigned m_maxAsyncCallStackDepth;
+    RefPtr<AsyncCallChain> m_currentAsyncCallChain;
+    unsigned m_nestedAsyncCallCount;
+    typedef HashMap<RawPtr<ExecutionContext>, OwnPtr<ExecutionContextData> > ExecutionContextDataMap;
+    ExecutionContextDataMap m_executionContextDataMap;
+};
+
+} // namespace blink
+
+#endif // !defined(AsyncCallStackTracker_h)