Support Promises instrumentation on backend.

Source/core/inspector/PromiseOfficer.cpp

Index: Source/core/inspector/PromiseOfficer.cpp
diff --git a/Source/core/inspector/PromiseOfficer.cpp b/Source/core/inspector/PromiseOfficer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..fc6ddd96c07c0df71ef6c8a433e260206d908388
--- /dev/null
+++ b/Source/core/inspector/PromiseOfficer.cpp
@@ -0,0 +1,83 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "core/inspector/PromiseOfficer.h"
+
+namespace WebCore {
+
+void PromiseOfficer::addPromise(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise, V8PromiseCustom::PromiseState state) {

[aandrey, 2014/02/26 16:11:30]

style: "{" on new line

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+    int promiseHash = promise->GetIdentityHash();
+    PromiseDataMap::iterator it = m_promiseDataMap.find(promiseHash);
+    if (it != m_promiseDataMap.end()) {
+        PromiseDataVector& vector = it->value;
+        for (size_t index = 0; index < vector.size(); index++) {

[aandrey, 2014/02/26 16:11:30]

remove or guard with "#ifndef NDEBUG"

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+            RefPtr<PromiseData> data = vector.at(index);
+            ASSERT(data->getPromise() != promise); // Because we add a new promise (and don't update existing ones).
+        }
+        vector.append(adoptRef(new PromiseData(promise, parentPromise, v8::Undefined(toIsolate(context)), state, context)));
+    } else {
+        PromiseDataVector vector;
+        vector.append(adoptRef(new PromiseData(promise, parentPromise, v8::Undefined(toIsolate(context)), state, context)));

[aandrey, 2014/02/26 16:11:30]

we can remove code dup:

PromiseDataVector* vector;
PromiseDataMap::iterator it = m_promiseDataMap.find(promiseHash);
if (it != m_promiseDataMap.end())
  vector = &m_promiseDataMap.set(promiseHash,
PromiseDataVector()).storedValue->value;
else
  vector = &it->value;
vector->append(...);

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+        m_promiseDataMap.set(promiseHash, vector);
+    }
+}
+
+void PromiseOfficer::setPromiseParent(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise) {
+    int promiseHash = promise->GetIdentityHash();
+    PromiseDataMap::iterator it = m_promiseDataMap.find(promiseHash);
+    ASSERT(it != m_promiseDataMap.end()); // This must be a promise that's already been tracked.

[aandrey, 2014/02/26 16:11:30]

we may be activated after a web page was loaded

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done, removed ASSERT.

+    PromiseDataVector& vector = it->value;
+    for (size_t index = 0; index < vector.size(); index++) {
+        RefPtr<PromiseData> data = vector.at(index);
+        if (data->getPromise() == promise && data->getParentPromise() != parentPromise) {

[aandrey, 2014/02/26 16:11:30]

remove: data->getParentPromise() != parentPromise

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+            vector.remove(index);
+            vector.append(adoptRef(new PromiseData(promise, parentPromise, data->getResult(), data->getState(), context)));

[aandrey, 2014/02/26 16:11:30]

just update the parent

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+            break;
+        }
+    }
+}
+
+void PromiseOfficer::setPromiseStateAndResult(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Value> result, V8PromiseCustom::PromiseState state) {
+    int promiseHash = promise->GetIdentityHash();
+    PromiseDataMap::iterator it = m_promiseDataMap.find(promiseHash);
+    ASSERT(it != m_promiseDataMap.end()); // This must be a promise that's already been tracked.

[aandrey, 2014/02/26 16:11:30]

ditto

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+    PromiseDataVector& vector = it->value;
+    for (size_t index = 0; index < vector.size(); index++) {
+        RefPtr<PromiseData> data = vector.at(index);
+        if (data->getPromise() == promise && data->getState() != state) {

[aandrey, 2014/02/26 16:11:30]

remove: data->getState() != state

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+            vector.remove(index);
+            vector.append(adoptRef(new PromiseData(promise, data->getParentPromise(), result, state, context)));

[aandrey, 2014/02/26 16:11:30]

just update

[Alexandra Mikhaylova, 2014/02/28 13:52:05]

Done.

+            break;
+        }
+    }
+}
+
+} // namespace WebCore