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      1 /*
      2  * Copyright (C) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "core/inspector/WorkerDebuggerAgent.h"
     33 
     34 #include "bindings/v8/ScriptDebugServer.h"
     35 #include "core/workers/WorkerGlobalScope.h"
     36 #include "core/workers/WorkerThread.h"
     37 #include "wtf/MessageQueue.h"
     38 
     39 namespace WebCore {
     40 
     41 namespace {
     42 
     43 Mutex& workerDebuggerAgentsMutex()
     44 {
     45     AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
     46     return mutex;
     47 }
     48 
     49 typedef HashMap<WorkerThread*, WorkerDebuggerAgent*> WorkerDebuggerAgents;
     50 
     51 WorkerDebuggerAgents& workerDebuggerAgents()
     52 {
     53     DEFINE_STATIC_LOCAL(WorkerDebuggerAgents, agents, ());
     54     return agents;
     55 }
     56 
     57 
     58 class RunInspectorCommandsTask FINAL : public ScriptDebugServer::Task {
     59 public:
     60     explicit RunInspectorCommandsTask(WorkerThread* thread)
     61         : m_thread(thread) { }
     62     virtual ~RunInspectorCommandsTask() { }
     63     virtual void run() OVERRIDE
     64     {
     65         // Process all queued debugger commands. WorkerThread is certainly
     66         // alive if this task is being executed.
     67         while (MessageQueueMessageReceived == m_thread->runLoop().runDebuggerTask(WorkerRunLoop::DontWaitForMessage)) { }
     68     }
     69 
     70 private:
     71     WorkerThread* m_thread;
     72 };
     73 
     74 } // namespace
     75 
     76 PassOwnPtr<WorkerDebuggerAgent> WorkerDebuggerAgent::create(WorkerScriptDebugServer* scriptDebugServer, WorkerGlobalScope* inspectedWorkerGlobalScope, InjectedScriptManager* injectedScriptManager)
     77 {
     78     return adoptPtr(new WorkerDebuggerAgent(scriptDebugServer, inspectedWorkerGlobalScope, injectedScriptManager));
     79 }
     80 
     81 WorkerDebuggerAgent::WorkerDebuggerAgent(WorkerScriptDebugServer* scriptDebugServer, WorkerGlobalScope* inspectedWorkerGlobalScope, InjectedScriptManager* injectedScriptManager)
     82     : InspectorDebuggerAgent(injectedScriptManager)
     83     , m_scriptDebugServer(scriptDebugServer)
     84     , m_inspectedWorkerGlobalScope(inspectedWorkerGlobalScope)
     85 {
     86     MutexLocker lock(workerDebuggerAgentsMutex());
     87     workerDebuggerAgents().set(inspectedWorkerGlobalScope->thread(), this);
     88 }
     89 
     90 WorkerDebuggerAgent::~WorkerDebuggerAgent()
     91 {
     92     MutexLocker lock(workerDebuggerAgentsMutex());
     93     ASSERT(workerDebuggerAgents().contains(m_inspectedWorkerGlobalScope->thread()));
     94     workerDebuggerAgents().remove(m_inspectedWorkerGlobalScope->thread());
     95 }
     96 
     97 void WorkerDebuggerAgent::interruptAndDispatchInspectorCommands(WorkerThread* thread)
     98 {
     99     MutexLocker lock(workerDebuggerAgentsMutex());
    100     WorkerDebuggerAgent* agent = workerDebuggerAgents().get(thread);
    101     if (agent)
    102         agent->m_scriptDebugServer->interruptAndRunTask(adoptPtr(new RunInspectorCommandsTask(thread)));
    103 }
    104 
    105 void WorkerDebuggerAgent::startListeningScriptDebugServer()
    106 {
    107     scriptDebugServer().addListener(this);
    108 }
    109 
    110 void WorkerDebuggerAgent::stopListeningScriptDebugServer()
    111 {
    112     scriptDebugServer().removeListener(this);
    113 }
    114 
    115 WorkerScriptDebugServer& WorkerDebuggerAgent::scriptDebugServer()
    116 {
    117     return *m_scriptDebugServer;
    118 }
    119 
    120 InjectedScript WorkerDebuggerAgent::injectedScriptForEval(ErrorString* error, const int* executionContextId)
    121 {
    122     if (executionContextId) {
    123         *error = "Execution context id is not supported for workers as there is only one execution context.";
    124         return InjectedScript();
    125     }
    126     return injectedScriptManager()->injectedScriptFor(m_inspectedWorkerGlobalScope->script()->scriptState());
    127 }
    128 
    129 void WorkerDebuggerAgent::muteConsole()
    130 {
    131     // We don't need to mute console for workers.
    132 }
    133 
    134 void WorkerDebuggerAgent::unmuteConsole()
    135 {
    136     // We don't need to mute console for workers.
    137 }
    138 
    139 } // namespace WebCore
    140