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
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index 0000000000000000000000000000000000000000..da533b75767fdccaba60732c2676d98e111b8f96
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+
+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.

[aandrey, 2014/02/25 12:36:07]

2014

[Alexandra Mikhaylova, 2014/02/26 14:08:41]

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/PromiseOfficer.h"
+
+namespace WebCore {
+
+PromiseOfficer::PromiseOfficer() { }
+
+void PromiseOfficer::addPromise(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> parentPromise, V8PromiseCustom::PromiseState state) {
+    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++) {
+            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, state, context)));
+    } else {
+        PromiseDataVector vector;
+        vector.append(adoptRef(new PromiseData(promise, parentPromise, state, context)));
+        m_promiseDataMap.set(promiseHash, vector);
+    }
+
+    printf("Added promise: hash %d, state %d\n", promiseHash, state);
+    if (!parentPromise->IsNull()) {
+        printf("Promise with hash %d has parent with hash %d\n", promiseHash, parentPromise->GetIdentityHash());
+    }
+}
+
+// TODO: Do we need this method?
+void PromiseOfficer::updatePromise(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> newParentPromise, V8PromiseCustom::PromiseState newState) {
+    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.
+    PromiseDataVector& vector = it->value;
+    for (size_t index = 0; index < vector.size(); index++) {
+        if (vector.at(index)->getPromise() == promise) {
+            vector.remove(index);
+            vector.append(adoptRef(new PromiseData(promise, newParentPromise, newState, context)));
+
+            printf("Updated promise: hash %d, state %d\n", promiseHash, newState);
+            if (!newParentPromise->IsNull()) {
+                printf("Promise with hash %d has parent with hash %d\n", promiseHash, newParentPromise->GetIdentityHash());
+            }
+
+            break;
+        }
+    }
+}
+
+void PromiseOfficer::updatePromiseParent(ExecutionContext* context, v8::Handle<v8::Object> promise, v8::Handle<v8::Object> newParentPromise) {
+    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.
+    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() != newParentPromise) {
+            v8::Handle<v8::Object> parentPromise = data->getParentPromise(); // For printf below.
+
+            vector.remove(index);
+            vector.append(adoptRef(new PromiseData(promise, newParentPromise, data->getState(), context)));
+
+            if (!parentPromise->IsNull()) {
+                printf("Updated promise PARENT: hash %d, old parent hash %d, new parent hash %d\n", promiseHash, parentPromise->GetIdentityHash(), newParentPromise->GetIdentityHash());
+            } else {
+                printf("Updated promise PARENT: hash %d, old parent NULL, new parent hash %d\n", promiseHash, newParentPromise->GetIdentityHash());
+            }
+
+            break;
+        }
+    }
+}
+
+void PromiseOfficer::updatePromiseState(ExecutionContext* context, v8::Handle<v8::Object> promise, V8PromiseCustom::PromiseState newState) {

[aandrey, 2014/02/25 12:36:07]

remove code dups

[Alexandra Mikhaylova, 2014/02/26 14:08:41]

Done, but updatePromiseParent and updatePromiseStateAndResult should be two
different methods as we must check whether arguments (future PromiseData
attribute values) are valid or not before updating information.

+    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.
+    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() != newState) {
+            vector.remove(index);
+            vector.append(adoptRef(new PromiseData(promise, data->getParentPromise(), newState, context)));
+
+            printf("Updated promise STATE: hash %d, old state %d, new state %d\n", promiseHash, data->getState(), newState);
+
+            break;
+        }
+    }
+}
+
+} // namespace WebCore