DevTools: simplify the async instrumentation harness.

third_party/WebKit/Source/platform/v8_inspector/V8AsyncCallTracker.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "platform/v8_inspector/V8AsyncCallTracker.h"
-
-#include "platform/inspector_protocol/Collections.h"
-#include "platform/inspector_protocol/String16.h"
-
-namespace blink {
-
-namespace {
-
-static const char v8AsyncTaskEventEnqueue[] = "enqueue";
-static const char v8AsyncTaskEventWillHandle[] = "willHandle";
-static const char v8AsyncTaskEventDidHandle[] = "didHandle";
-
-}
-
-static String16 makeV8AsyncTaskUniqueId(const String16& eventName, int id)
-{
-    String16Builder builder;
-    builder.append(eventName);
-    builder.append(" -> ");
-    builder.appendNumber(id);
-    return builder.toString();
-}
-
-V8AsyncCallTracker::V8AsyncCallTracker(V8DebuggerAgentImpl* debuggerAgent)
-    : m_debuggerAgent(debuggerAgent)
-{
-}
-
-V8AsyncCallTracker::~V8AsyncCallTracker()
-{
-    ASSERT(m_idToOperations.isEmpty());
-}
-
-void V8AsyncCallTracker::asyncCallTrackingStateChanged(bool)
-{
-}
-
-void V8AsyncCallTracker::resetAsyncOperations()
-{
-    for (auto& it : m_idToOperations)
-        completeOperations(it.second->map);
-    m_idToOperations.clear();
-}
-
-void V8AsyncCallTracker::contextDisposed(int contextId)
-{
-    completeOperations(m_idToOperations.get(contextId)->map);
-    m_idToOperations.remove(contextId);
-}
-
-void V8AsyncCallTracker::didReceiveV8AsyncTaskEvent(v8::Local<v8::Context> context, const String16& eventType, const String16& eventName, int id)
-{
-    ASSERT(m_debuggerAgent->trackingAsyncCalls());
-    if (eventType == v8AsyncTaskEventEnqueue)
-        didEnqueueV8AsyncTask(context, eventName, id);
-    else if (eventType == v8AsyncTaskEventWillHandle)
-        willHandleV8AsyncTask(context, eventName, id);
-    else if (eventType == v8AsyncTaskEventDidHandle)
-        m_debuggerAgent->traceAsyncCallbackCompleted();
-    else
-        ASSERT_NOT_REACHED();
-}
-
-void V8AsyncCallTracker::weakCallback(const v8::WeakCallbackInfo<Operations>& data)
-{
-    data.GetParameter()->target->contextDisposed(data.GetParameter()->contextId);
-}
-
-void V8AsyncCallTracker::didEnqueueV8AsyncTask(v8::Local<v8::Context> context, const String16& eventName, int id)
-{
-    ASSERT(!context.IsEmpty());
-    ASSERT(m_debuggerAgent->trackingAsyncCalls());
-    int operationId = m_debuggerAgent->traceAsyncOperationStarting(eventName);
-    if (!operationId)
-        return;
-    int contextId = V8Debugger::contextId(context);
-    Operations* operations = m_idToOperations.get(contextId);
-    if (!operations) {
-        OwnPtr<Operations> newOperations = adoptPtr(new Operations());
-        newOperations->contextId = contextId;
-        newOperations->target = this;
-        newOperations->context.Reset(context->GetIsolate(), context);
-        operations = newOperations.get();
-        m_idToOperations.set(contextId, newOperations.release());
-        operations->context.SetWeak(operations, V8AsyncCallTracker::weakCallback, v8::WeakCallbackType::kParameter);
-    }
-    operations->map.set(makeV8AsyncTaskUniqueId(eventName, id), operationId);
-}
-
-void V8AsyncCallTracker::willHandleV8AsyncTask(v8::Local<v8::Context> context, const String16& eventName, int id)
-{
-    ASSERT(!context.IsEmpty());
-    ASSERT(m_debuggerAgent->trackingAsyncCalls());
-    int contextId = V8Debugger::contextId(context);
-    if (Operations* operations = m_idToOperations.get(contextId)) {
-        String16 taskId = makeV8AsyncTaskUniqueId(eventName, id);
-        int operationId = operations->map.get(taskId);
-        m_debuggerAgent->traceAsyncCallbackStarting(operationId);
-        m_debuggerAgent->traceAsyncOperationCompleted(operationId);
-        operations->map.remove(taskId);
-    } else {
-        m_debuggerAgent->traceAsyncCallbackStarting(V8DebuggerAgentImpl::unknownAsyncOperationId);
-    }
-}
-
-void V8AsyncCallTracker::completeOperations(const protocol::HashMap<String16, int>& contextCallChains)
-{
-    for (const auto& it : contextCallChains)
-        m_debuggerAgent->traceAsyncOperationCompleted(*it.second);
-}
-
-} // namespace blink