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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 "bindings/v8/WorkerScriptDebugServer.h"
     33 
     34 #include "bindings/v8/V8ScriptRunner.h"
     35 #include "core/inspector/ScriptDebugListener.h"
     36 #include "core/inspector/WorkerDebuggerAgent.h"
     37 #include "core/workers/WorkerGlobalScope.h"
     38 #include "core/workers/WorkerThread.h"
     39 #include <v8.h>
     40 #include "wtf/MessageQueue.h"
     41 
     42 
     43 namespace WebCore {
     44 
     45 WorkerScriptDebugServer::WorkerScriptDebugServer(WorkerGlobalScope* workerGlobalScope, const String& mode)
     46     : ScriptDebugServer(v8::Isolate::GetCurrent())
     47     , m_listener(0)
     48     , m_workerGlobalScope(workerGlobalScope)
     49     , m_debuggerTaskMode(mode)
     50 {
     51     ASSERT(m_isolate);
     52 }
     53 
     54 void WorkerScriptDebugServer::addListener(ScriptDebugListener* listener)
     55 {
     56     v8::HandleScope scope(m_isolate);
     57     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
     58     v8::Context::Scope contextScope(debuggerContext);
     59 
     60     ASSERT(!m_listener);
     61     m_listener = listener;
     62 
     63     ensureDebuggerScriptCompiled();
     64     v8::Local<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
     65     ASSERT(!debuggerScript->IsUndefined());
     66     v8::Debug::SetDebugEventListener2(&WorkerScriptDebugServer::v8DebugEventCallback, v8::External::New(m_isolate, this));
     67 
     68     v8::Handle<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, "getWorkerScripts")));
     69     v8::Handle<v8::Value> value = V8ScriptRunner::callInternalFunction(getScriptsFunction, debuggerScript, 0, 0, m_isolate);
     70     if (value.IsEmpty())
     71         return;
     72     ASSERT(!value->IsUndefined() && value->IsArray());
     73     v8::Handle<v8::Array> scriptsArray = v8::Handle<v8::Array>::Cast(value);
     74     for (unsigned i = 0; i < scriptsArray->Length(); ++i)
     75         dispatchDidParseSource(listener, v8::Handle<v8::Object>::Cast(scriptsArray->Get(v8::Integer::New(i, m_isolate))));
     76 }
     77 
     78 void WorkerScriptDebugServer::removeListener(ScriptDebugListener* listener)
     79 {
     80     ASSERT(m_listener == listener);
     81     continueProgram();
     82     m_listener = 0;
     83     v8::Debug::SetDebugEventListener2(0);
     84 }
     85 
     86 void WorkerScriptDebugServer::interruptAndRunTask(PassOwnPtr<Task> task)
     87 {
     88     interruptAndRun(task, m_isolate);
     89 }
     90 
     91 ScriptDebugListener* WorkerScriptDebugServer::getDebugListenerForContext(v8::Handle<v8::Context>)
     92 {
     93     // There is only one worker context in isolate.
     94     return m_listener;
     95 }
     96 
     97 void WorkerScriptDebugServer::runMessageLoopOnPause(v8::Handle<v8::Context>)
     98 {
     99     MessageQueueWaitResult result;
    100     do {
    101         result = m_workerGlobalScope->thread()->runLoop().runInMode(m_workerGlobalScope, m_debuggerTaskMode);
    102     // Keep waiting until execution is resumed.
    103     } while (result == MessageQueueMessageReceived && isPaused());
    104 
    105     // The listener may have been removed in the nested loop.
    106     if (m_listener)
    107         m_listener->didContinue();
    108 }
    109 
    110 void WorkerScriptDebugServer::quitMessageLoopOnPause()
    111 {
    112     // Nothing to do here in case of workers since runMessageLoopOnPause will check for paused state after each debugger command.
    113 }
    114 
    115 } // namespace WebCore
    116