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/core/v8/WorkerScriptDebugServer.h"
33
34#include "bindings/core/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 "wtf/MessageQueue.h"
40#include <v8.h>
41
42
43namespace blink {
44
45WorkerScriptDebugServer::WorkerScriptDebugServer(WorkerGlobalScope* workerGlobalScope)
46    : ScriptDebugServer(v8::Isolate::GetCurrent())
47    , m_listener(0)
48    , m_workerGlobalScope(workerGlobalScope)
49{
50    ASSERT(m_isolate);
51}
52
53void WorkerScriptDebugServer::addListener(ScriptDebugListener* listener)
54{
55    v8::HandleScope scope(m_isolate);
56    ASSERT(!m_listener);
57
58    v8::Debug::SetDebugEventListener(&WorkerScriptDebugServer::v8DebugEventCallback, v8::External::New(m_isolate, this));
59    ensureDebuggerScriptCompiled();
60    m_listener = listener;
61
62    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
63    v8::Context::Scope contextScope(debuggerContext);
64
65    v8::Local<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
66    ASSERT(!debuggerScript->IsUndefined());
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(m_isolate, i))), CompileSuccess);
76}
77
78void WorkerScriptDebugServer::removeListener(ScriptDebugListener* listener)
79{
80    ASSERT(m_listener == listener);
81    continueProgram();
82    discardDebuggerScript();
83    m_listener = 0;
84    v8::Debug::SetDebugEventListener(0);
85}
86
87void WorkerScriptDebugServer::interruptAndRunTask(PassOwnPtr<Task> task)
88{
89    interruptAndRun(task, m_isolate);
90}
91
92ScriptDebugListener* WorkerScriptDebugServer::getDebugListenerForContext(v8::Handle<v8::Context>)
93{
94    // There is only one worker context in isolate.
95    return m_listener;
96}
97
98void WorkerScriptDebugServer::runMessageLoopOnPause(v8::Handle<v8::Context>)
99{
100    MessageQueueWaitResult result;
101    m_workerGlobalScope->thread()->willEnterNestedLoop();
102    do {
103        result = m_workerGlobalScope->thread()->runDebuggerTask();
104    // Keep waiting until execution is resumed.
105    } while (result == MessageQueueMessageReceived && isPaused());
106    m_workerGlobalScope->thread()->didLeaveNestedLoop();
107
108    // The listener may have been removed in the nested loop.
109    if (m_listener)
110        m_listener->didContinue();
111}
112
113void WorkerScriptDebugServer::quitMessageLoopOnPause()
114{
115    // Nothing to do here in case of workers since runMessageLoopOnPause will check for paused state after each debugger command.
116}
117
118} // namespace blink
119