Support Promises instrumentation on backend.

Source/core/inspector/PromiseOfficer.h

+/*
+ * Copyright (C) 2014 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 PromiseOfficer_h
+#define PromiseOfficer_h
+
+#include "bindings/v8/custom/V8PromiseCustom.h"
+#include "bindings/v8/ScriptObject.h"
+#include "bindings/v8/ScriptState.h"
+#include "core/inspector/ScriptCallStack.h"
+#include "wtf/HashMap.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
+
+namespace WebCore {
+
+class ExecutionContext;
+
+class PromiseOfficer {
+    WTF_MAKE_NONCOPYABLE(PromiseOfficer);
+public:
+    PromiseOfficer() : m_isEnabled(false) { }
+
+    bool isEnabled() const { return m_isEnabled; }
+    void enable();
+    void disable();
+
+    void clear();
+
+    void didCreatePromise(const ScriptObject& promise);
+    void didUpdatePromiseParent(const ScriptObject& promise, const ScriptObject& parentPromise);
+    void didUpdatePromiseState(const ScriptObject& promise, V8PromiseCustom::PromiseState, const ScriptValue& result);
+
+private:
+    class PromiseData : public RefCounted<PromiseData> {

[yurys, 2014/03/12 10:56:53]

Forward declaration of PromiseData should be enough in the header.

[aandrey, 2014/03/12 11:23:14]

I doubt.

+    public:
+        PromiseData(const ScriptObject& promise, const ScriptObject& parentPromise, const ScriptValue& result, V8PromiseCustom::PromiseState state, double timestamp);
+
+        void didSettlePromise(double timestamp);
+
+        ScriptObject m_promise;
+        ScriptObject m_parentPromise;
+        ScriptValue m_result;
+        V8PromiseCustom::PromiseState m_state;
+
+        // Time in milliseconds.
+        double m_timeOnCreate;
+        double m_timeOnSettle;
+
+        RefPtr<ScriptCallStack> m_callStackOnCreate;
+        RefPtr<ScriptCallStack> m_callStackOnSettle;
+    };
+
+    struct ScriptObjectHash {

[aandrey, 2014/03/11 10:43:38]

plz move these to a separate file bindings/v8/ScriptObjectTraits.h

[Alexandra Mikhaylova, 2014/03/12 12:11:51]

Done.

+        static unsigned hash(const ScriptObject& object) { return object.v8Object()->GetIdentityHash(); }
+        static bool equal(const ScriptObject& a, const ScriptObject& b) { return a == b; }
+        static const bool safeToCompareToEmptyOrDeleted = true;
+    };
+
+    struct ScriptObjectHashTraits : WTF::GenericHashTraits<ScriptObject> {
+        static const bool emptyValueIsZero = false;
+        static ScriptObject emptyValue() { return ScriptObject(ScriptState::current(), ScriptValue::createNull()); }
+        static void constructDeletedValue(ScriptObject& slot) { slot = ScriptObject(); }
+        static bool isDeletedValue(ScriptObject value) { return value == ScriptObject(); }

[aandrey, 2014/03/11 10:43:38]

{ return value.hasNoValue(); }

[Alexandra Mikhaylova, 2014/03/12 12:11:51]

Done.

+    };
+
+    bool m_isEnabled;
+    typedef HashMap<ScriptObject, RefPtr<PromiseData>, ScriptObjectHash, ScriptObjectHashTraits> PromiseDataMap;
+    PromiseDataMap m_promiseDataMap;
+};
+
+} // namespace WebCore
+
+#endif // !defined(PromiseOfficer_h)