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 "WorkerScriptDebugServer.h"
33
34 #if ENABLE(JAVASCRIPT_DEBUGGER) && ENABLE(WORKERS)
35
36 #include "ScriptDebugListener.h"
37 #include "V8DOMWrapper.h"
38 #include "V8DedicatedWorkerContext.h"
39 #include "V8SharedWorkerContext.h"
40 #include "WorkerContext.h"
41 #include "WorkerContextExecutionProxy.h"
42 #include "WorkerThread.h"
43 #include <v8.h>
44 #include <wtf/MessageQueue.h>
45
46 namespace WebCore {
47
retrieveWorkerContext(v8::Handle<v8::Context> context)48 static WorkerContext* retrieveWorkerContext(v8::Handle<v8::Context> context)
49 {
50 v8::Handle<v8::Object> global = context->Global();
51 ASSERT(!global.IsEmpty());
52
53 v8::Handle<v8::Object> prototype = v8::Handle<v8::Object>::Cast(global->GetPrototype());
54 ASSERT(!prototype.IsEmpty());
55
56 prototype = v8::Handle<v8::Object>::Cast(prototype->GetPrototype());
57 ASSERT(!prototype.IsEmpty());
58
59 WrapperTypeInfo* typeInfo = V8DOMWrapper::domWrapperType(prototype);
60 if (&V8DedicatedWorkerContext::info == typeInfo)
61 return V8DedicatedWorkerContext::toNative(prototype);
62 if (&V8SharedWorkerContext::info == typeInfo)
63 return V8SharedWorkerContext::toNative(prototype);
64 ASSERT_NOT_REACHED();
65 return 0;
66 }
67
WorkerScriptDebugServer()68 WorkerScriptDebugServer::WorkerScriptDebugServer()
69 : ScriptDebugServer()
70 , m_pausedWorkerContext(0)
71 {
72 }
73
addListener(ScriptDebugListener * listener,WorkerContext * workerContext)74 void WorkerScriptDebugServer::addListener(ScriptDebugListener* listener, WorkerContext* workerContext)
75 {
76 v8::HandleScope scope;
77 v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
78 v8::Context::Scope contextScope(debuggerContext);
79
80 if (!m_listenersMap.size()) {
81 // FIXME: synchronize access to this code.
82 ensureDebuggerScriptCompiled();
83 ASSERT(!m_debuggerScript.get()->IsUndefined());
84 v8::Debug::SetDebugEventListener2(&WorkerScriptDebugServer::v8DebugEventCallback, v8::External::New(this));
85 }
86 m_listenersMap.set(workerContext, listener);
87
88 WorkerContextExecutionProxy* proxy = workerContext->script()->proxy();
89 if (!proxy)
90 return;
91 v8::Handle<v8::Context> context = proxy->context();
92
93 v8::Handle<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.get()->Get(v8::String::New("getWorkerScripts")));
94 v8::Handle<v8::Value> argv[] = { v8::Handle<v8::Value>() };
95 v8::Handle<v8::Value> value = getScriptsFunction->Call(m_debuggerScript.get(), 0, argv);
96 if (value.IsEmpty())
97 return;
98 ASSERT(!value->IsUndefined() && value->IsArray());
99 v8::Handle<v8::Array> scriptsArray = v8::Handle<v8::Array>::Cast(value);
100 for (unsigned i = 0; i < scriptsArray->Length(); ++i)
101 dispatchDidParseSource(listener, v8::Handle<v8::Object>::Cast(scriptsArray->Get(v8::Integer::New(i))));
102 }
103
removeListener(ScriptDebugListener * listener,WorkerContext * workerContext)104 void WorkerScriptDebugServer::removeListener(ScriptDebugListener* listener, WorkerContext* workerContext)
105 {
106 if (!m_listenersMap.contains(workerContext))
107 return;
108
109 if (m_pausedWorkerContext == workerContext)
110 continueProgram();
111
112 m_listenersMap.remove(workerContext);
113
114 if (m_listenersMap.isEmpty())
115 v8::Debug::SetDebugEventListener2(0);
116 }
117
getDebugListenerForContext(v8::Handle<v8::Context> context)118 ScriptDebugListener* WorkerScriptDebugServer::getDebugListenerForContext(v8::Handle<v8::Context> context)
119 {
120 WorkerContext* workerContext = retrieveWorkerContext(context);
121 if (!workerContext)
122 return 0;
123 return m_listenersMap.get(workerContext);
124 }
125
runMessageLoopOnPause(v8::Handle<v8::Context> context)126 void WorkerScriptDebugServer::runMessageLoopOnPause(v8::Handle<v8::Context> context)
127 {
128 WorkerContext* workerContext = retrieveWorkerContext(context);
129 WorkerThread* workerThread = workerContext->thread();
130
131 m_pausedWorkerContext = workerContext;
132
133 MessageQueueWaitResult result;
134 do {
135 result = workerThread->runLoop().runInMode(workerContext, "debugger");
136 // Keep waiting until execution is resumed.
137 } while (result == MessageQueueMessageReceived && isPaused());
138 m_pausedWorkerContext = 0;
139
140 // The listener may have been removed in the nested loop.
141 if (ScriptDebugListener* listener = m_listenersMap.get(workerContext))
142 listener->didContinue();
143 }
144
quitMessageLoopOnPause()145 void WorkerScriptDebugServer::quitMessageLoopOnPause()
146 {
147 // FIXME: do exit nested loop when listener is removed on pause.
148 }
149
150 } // namespace WebCore
151
152 #endif // ENABLE(JAVASCRIPT_DEBUGGER) && ENABLE(WORKERS)
153