Support Promises event-based instrumentation on backend.

Source/core/inspector/PromiseTracker.cpp

Index: Source/core/inspector/PromiseTracker.cpp
diff --git a/Source/core/inspector/PromiseTracker.cpp b/Source/core/inspector/PromiseTracker.cpp
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index 0000000000000000000000000000000000000000..5630e2ba515e16823bfef2a8310c88dd2704ec71
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+/*
+ * Copyright (C) 2014 Google Inc. All rights reserved.

[aandrey, 2014/08/01 08:28:12]

use new

[Alexandra Mikhaylova, 2014/08/04 14:25:06]

Done.

+ *
+ * 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.
+ */
+
+#include "config.h"
+#include "core/inspector/PromiseTracker.h"
+
+#include "bindings/core/v8/ScriptCallStackFactory.h"
+#include "bindings/core/v8/V8Binding.h"
+
+namespace blink {
+
+PromiseTracker::PromiseData::PromiseData(v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise, int status, v8::Handle<v8::Value> value, v8::Isolate* isolate, PromiseTracker* tracker, bool getStack)
+    : m_isolate(isolate)
+    , m_promiseTracker(tracker)
+    , m_promise(m_isolate, promise)
+    , m_functionDetails(*(new ScriptCallFrame("", "", "", 0, 0)))

[aandrey, 2014/08/01 08:28:12]

memory leak. just remove

[Alexandra Mikhaylova, 2014/08/04 14:25:06]

Done.

+    , m_parentPromise(m_isolate, parentPromise)
+    , m_status(status)
+    , m_value(m_isolate, value)
+    , m_weakPtrFactory(this)
+{
+    if (getStack) {

[aandrey, 2014/08/01 08:28:12]

captureStack

[Alexandra Mikhaylova, 2014/08/04 14:25:06]

Done.

+        RefPtrWillBeRawPtr<ScriptCallStack> stack = createScriptCallStack(1, true);

[aandrey, 2014/08/01 08:28:12]

should create stack on the given isolate

[Alexandra Mikhaylova, 2014/08/04 14:25:06]

Done.

+        if (stack->size())
+            m_functionDetails = stack->at(0);
+    }
+    PromiseDataWrapper* wrapper = new PromiseDataWrapper(m_weakPtrFactory.createWeakPtr());
+    m_promise.setWeak(wrapper, &PromiseTracker::PromiseDataWrapper::didRemovePromise);
+}
+
+void PromiseTracker::enable()
+{
+    m_isEnabled = true;
+}
+
+void PromiseTracker::disable()
+{
+    m_isEnabled = false;
+    clear();
+}
+
+void PromiseTracker::clear()
+{
+    m_promiseDataMap.clear();
+}
+
+PromiseTracker::PromiseDataVector* PromiseTracker::getPromiseVector(v8::Handle<v8::Object> promise)
+{
+    ASSERT(isEnabled());
+
+    int promiseHash = promise->GetIdentityHash();
+    PromiseDataMap::iterator it = m_promiseDataMap.find(promiseHash);
+    if (it != m_promiseDataMap.end())
+        return &it->value;
+    return &m_promiseDataMap.add(promiseHash, PromiseDataVector()).storedValue->value;
+}
+
+void PromiseTracker::didCreatePromise(ExecutionContext* context, v8::Handle<v8::Object> promise)
+{
+    ASSERT(isEnabled());
+
+    PromiseDataVector* vector = getPromiseVector(promise);
+    v8::Isolate* isolate = toIsolate(context);
+    vector->append(adoptRef(new PromiseData(promise, v8::Handle<v8::Object>(), 0, v8::Undefined(isolate), isolate, this, true)));
+}
+
+void PromiseTracker::didUpdatePromiseParent(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise)
+{
+    ASSERT(isEnabled());
+
+    PromiseDataVector* vector = getPromiseVector(promise);
+    bool found = false;
+    for (size_t index = 0; index < vector->size(); ++index) {
+        RefPtr<PromiseData> data = (*vector)[index];
+        if (data->m_promise == promise) {
+            found = true;
+            data->m_parentPromise.set(data->m_isolate, parentPromise);
+            break;
+        }
+    }
+    if (!found) {
+        v8::Isolate* isolate = toIsolate(context);
+        vector->append(adoptRef(new PromiseData(promise, parentPromise, 0, v8::Undefined(isolate), isolate, this)));
+    }
+}
+
+void PromiseTracker::didUpdatePromiseStatus(ExecutionContext* context, v8::Handle<v8::Object> promise, int status, v8::Handle<v8::Value> value)
+{
+    ASSERT(isEnabled());
+
+    PromiseDataVector* vector = getPromiseVector(promise);
+    bool found = false;
+    for (size_t index = 0; index < vector->size(); ++index) {
+        RefPtr<PromiseData> data = (*vector)[index];
+        if (data->m_promise == promise) {
+            found = true;
+            data->m_status = status;
+            data->m_value.set(data->m_isolate, value);
+            break;
+        }
+    }
+    if (!found)
+        vector->append(adoptRef(new PromiseData(promise, v8::Handle<v8::Object>(), status, value, toIsolate(context), this)));
+}
+
+void PromiseTracker::didRemovePromise(v8::Handle<v8::Object> promise)
+{
+    ASSERT(isEnabled());
+
+    PromiseDataVector* vector = getPromiseVector(promise);
+    ASSERT(vector->size() >= 1);
+    bool found = false;
+    for (size_t index = 0; index < vector->size(); ++index) {
+        RefPtr<PromiseData> data = (*vector)[index];
+        if (data->m_promise == promise) {
+            found = true;
+            vector->remove(index);
+            break;
+        }
+    }
+    if (vector->size() == 0)
+        m_promiseDataMap.remove(promise->GetIdentityHash());
+}
+
+void PromiseTracker::PromiseDataWrapper::didRemovePromise(const v8::WeakCallbackData<v8::Object, PromiseDataWrapper>& data)
+{

[aandrey, 2014/08/01 08:28:12]

memory leak for PromiseDataWrapper. use OwnPtr

[Alexandra Mikhaylova, 2014/08/04 14:25:06]

Thanks, done.

+
+    PromiseData* promiseData = data.GetParameter()->m_data.get();

[aandrey, 2014/08/01 08:28:12]

use WeakPtr<PromiseData>

[Alexandra Mikhaylova, 2014/08/04 14:25:06]

Done.

+    if (!(promiseData && promiseData->m_promiseTracker->isEnabled()))
+        return;
+
+    promiseData->m_promiseTracker->didRemovePromise(promiseData->m_promise.newLocal(promiseData->m_isolate));
+}
+
+} // namespace blink