Source/core/inspector/WorkerDebuggerAgent.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "core/inspector/WorkerDebuggerAgent.h"

#include "bindings/v8/ScriptDebugServer.h"
#include "core/workers/WorkerGlobalScope.h"
#include "core/workers/WorkerThread.h"
#include "wtf/MessageQueue.h"

namespace WebCore {

namespace {

Mutex& workerDebuggerAgentsMutex()
{
    AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
    return mutex;
}

typedef HashMap<WorkerThread*, WorkerDebuggerAgent*> WorkerDebuggerAgents;

WorkerDebuggerAgents& workerDebuggerAgents()
{
    DEFINE_STATIC_LOCAL(WorkerDebuggerAgents, agents, ());
    return agents;
}


class RunInspectorCommandsTask : public ScriptDebugServer::Task {
public:
    RunInspectorCommandsTask(WorkerThread* thread, WorkerGlobalScope* workerGlobalScope)
        : m_thread(thread)
        , m_workerGlobalScope(workerGlobalScope) { }
    virtual ~RunInspectorCommandsTask() { }
    virtual void run()
    {
        // Process all queued debugger commands. It is safe to use m_workerGlobalScope here
        // because it is alive if RunWorkerLoop is not terminated, otherwise it will
        // just be ignored. WorkerThread is certainly alive if this task is being executed.
        while (MessageQueueMessageReceived == m_thread->runLoop().runInMode(m_workerGlobalScope, WorkerDebuggerAgent::debuggerTaskMode, WorkerRunLoop::DontWaitForMessage)) { }
    }

private:
    WorkerThread* m_thread;
    WorkerGlobalScope* m_workerGlobalScope;
};

} // namespace

const char* WorkerDebuggerAgent::debuggerTaskMode = "debugger";

PassOwnPtr<WorkerDebuggerAgent> WorkerDebuggerAgent::create(InstrumentingAgents* instrumentingAgents, InspectorCompositeState* inspectorState, WorkerScriptDebugServer* scriptDebugServer, WorkerGlobalScope* inspectedWorkerGlobalScope, InjectedScriptManager* injectedScriptManager)
{
    return adoptPtr(new WorkerDebuggerAgent(instrumentingAgents, inspectorState, scriptDebugServer, inspectedWorkerGlobalScope, injectedScriptManager));
}

WorkerDebuggerAgent::WorkerDebuggerAgent(InstrumentingAgents* instrumentingAgents, InspectorCompositeState* inspectorState, WorkerScriptDebugServer* scriptDebugServer, WorkerGlobalScope* inspectedWorkerGlobalScope, InjectedScriptManager* injectedScriptManager)
    : InspectorDebuggerAgent(instrumentingAgents, inspectorState, injectedScriptManager)
    , m_scriptDebugServer(scriptDebugServer)
    , m_inspectedWorkerGlobalScope(inspectedWorkerGlobalScope)
{
    MutexLocker lock(workerDebuggerAgentsMutex());
    workerDebuggerAgents().set(inspectedWorkerGlobalScope->thread(), this);
}

WorkerDebuggerAgent::~WorkerDebuggerAgent()
{
    MutexLocker lock(workerDebuggerAgentsMutex());
    ASSERT(workerDebuggerAgents().contains(m_inspectedWorkerGlobalScope->thread()));
    workerDebuggerAgents().remove(m_inspectedWorkerGlobalScope->thread());
}

void WorkerDebuggerAgent::interruptAndDispatchInspectorCommands(WorkerThread* thread)
{
    MutexLocker lock(workerDebuggerAgentsMutex());
    WorkerDebuggerAgent* agent = workerDebuggerAgents().get(thread);
    if (agent)
        agent->m_scriptDebugServer->interruptAndRunTask(adoptPtr(new RunInspectorCommandsTask(thread, agent->m_inspectedWorkerGlobalScope)));
}

void WorkerDebuggerAgent::startListeningScriptDebugServer()
{
    scriptDebugServer().addListener(this);
}

void WorkerDebuggerAgent::stopListeningScriptDebugServer()
{
    scriptDebugServer().removeListener(this);
}

WorkerScriptDebugServer& WorkerDebuggerAgent::scriptDebugServer()
{
    return *m_scriptDebugServer;
}

InjectedScript WorkerDebuggerAgent::injectedScriptForEval(ErrorString* error, const int* executionContextId)
{
    if (executionContextId) {
        *error = "Execution context id is not supported for workers as there is only one execution context.";
        return InjectedScript();
    }
    ScriptState* scriptState = scriptStateFromWorkerGlobalScope(m_inspectedWorkerGlobalScope);
    return injectedScriptManager()->injectedScriptFor(scriptState);
}

void WorkerDebuggerAgent::muteConsole()
{
    // We don't need to mute console for workers.
}

void WorkerDebuggerAgent::unmuteConsole()
{
    // We don't need to mute console for workers.
}

void WorkerDebuggerAgent::addConsoleMessage(MessageSource source, MessageLevel level, const String& message, const String& sourceURL)
{
    ScriptExecutionContext* context = m_inspectedWorkerGlobalScope;
    context->addConsoleMessage(source, level, message, sourceURL, 0);
}

} // namespace WebCore