1/*
2 * Copyright (c) 2010-2011 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/ScriptDebugServer.h"
33
34#include "DebuggerScriptSource.h"
35#include "V8JavaScriptCallFrame.h"
36#include "bindings/v8/ScopedPersistent.h"
37#include "bindings/v8/ScriptController.h"
38#include "bindings/v8/ScriptObject.h"
39#include "bindings/v8/ScriptSourceCode.h"
40#include "bindings/v8/V8Binding.h"
41#include "bindings/v8/V8ScriptRunner.h"
42#include "core/inspector/JavaScriptCallFrame.h"
43#include "core/inspector/ScriptDebugListener.h"
44#include "wtf/StdLibExtras.h"
45#include "wtf/Vector.h"
46#include "wtf/dtoa/utils.h"
47#include "wtf/text/CString.h"
48
49namespace WebCore {
50
51namespace {
52
53class ClientDataImpl : public v8::Debug::ClientData {
54public:
55    ClientDataImpl(PassOwnPtr<ScriptDebugServer::Task> task) : m_task(task) { }
56    virtual ~ClientDataImpl() { }
57    ScriptDebugServer::Task* task() const { return m_task.get(); }
58private:
59    OwnPtr<ScriptDebugServer::Task> m_task;
60};
61
62const char stepIntoV8MethodName[] = "stepIntoStatement";
63const char stepOutV8MethodName[] = "stepOutOfFunction";
64}
65
66v8::Local<v8::Value> ScriptDebugServer::callDebuggerMethod(const char* functionName, int argc, v8::Handle<v8::Value> argv[])
67{
68    v8::Handle<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
69    v8::Handle<v8::Function> function = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, functionName)));
70    ASSERT(m_isolate->InContext());
71    return V8ScriptRunner::callInternalFunction(function, debuggerScript, argc, argv, m_isolate);
72}
73
74ScriptDebugServer::ScriptDebugServer(v8::Isolate* isolate)
75    : m_pauseOnExceptionsState(DontPauseOnExceptions)
76    , m_breakpointsActivated(true)
77    , m_isolate(isolate)
78    , m_runningNestedMessageLoop(false)
79{
80}
81
82ScriptDebugServer::~ScriptDebugServer()
83{
84}
85
86String ScriptDebugServer::setBreakpoint(const String& sourceID, const ScriptBreakpoint& scriptBreakpoint, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation)
87{
88    v8::HandleScope scope(m_isolate);
89    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
90    v8::Context::Scope contextScope(debuggerContext);
91
92    v8::Local<v8::Object> info = v8::Object::New();
93    info->Set(v8AtomicString(m_isolate, "sourceID"), v8String(debuggerContext->GetIsolate(), sourceID));
94    info->Set(v8AtomicString(m_isolate, "lineNumber"), v8::Integer::New(scriptBreakpoint.lineNumber, debuggerContext->GetIsolate()));
95    info->Set(v8AtomicString(m_isolate, "columnNumber"), v8::Integer::New(scriptBreakpoint.columnNumber, debuggerContext->GetIsolate()));
96    info->Set(v8AtomicString(m_isolate, "interstatementLocation"), v8Boolean(interstatementLocation, debuggerContext->GetIsolate()));
97    info->Set(v8AtomicString(m_isolate, "condition"), v8String(debuggerContext->GetIsolate(), scriptBreakpoint.condition));
98
99    v8::Handle<v8::Function> setBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "setBreakpoint")));
100    v8::Handle<v8::Value> breakpointId = v8::Debug::Call(setBreakpointFunction, info);
101    if (!breakpointId->IsString())
102        return "";
103    *actualLineNumber = info->Get(v8AtomicString(m_isolate, "lineNumber"))->Int32Value();
104    *actualColumnNumber = info->Get(v8AtomicString(m_isolate, "columnNumber"))->Int32Value();
105    return toCoreString(breakpointId.As<v8::String>());
106}
107
108void ScriptDebugServer::removeBreakpoint(const String& breakpointId)
109{
110    v8::HandleScope scope(m_isolate);
111    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
112    v8::Context::Scope contextScope(debuggerContext);
113
114    v8::Local<v8::Object> info = v8::Object::New();
115    info->Set(v8AtomicString(m_isolate, "breakpointId"), v8String(debuggerContext->GetIsolate(), breakpointId));
116
117    v8::Handle<v8::Function> removeBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "removeBreakpoint")));
118    v8::Debug::Call(removeBreakpointFunction, info);
119}
120
121void ScriptDebugServer::clearBreakpoints()
122{
123    ensureDebuggerScriptCompiled();
124    v8::HandleScope scope(m_isolate);
125    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
126    v8::Context::Scope contextScope(debuggerContext);
127
128    v8::Handle<v8::Function> clearBreakpoints = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "clearBreakpoints")));
129    v8::Debug::Call(clearBreakpoints);
130}
131
132void ScriptDebugServer::setBreakpointsActivated(bool activated)
133{
134    ensureDebuggerScriptCompiled();
135    v8::HandleScope scope(m_isolate);
136    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
137    v8::Context::Scope contextScope(debuggerContext);
138
139    v8::Local<v8::Object> info = v8::Object::New();
140    info->Set(v8AtomicString(m_isolate, "enabled"), v8::Boolean::New(m_isolate, activated));
141    v8::Handle<v8::Function> setBreakpointsActivated = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "setBreakpointsActivated")));
142    v8::Debug::Call(setBreakpointsActivated, info);
143
144    m_breakpointsActivated = activated;
145}
146
147ScriptDebugServer::PauseOnExceptionsState ScriptDebugServer::pauseOnExceptionsState()
148{
149    ensureDebuggerScriptCompiled();
150    v8::HandleScope scope(m_isolate);
151    v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
152
153    v8::Handle<v8::Value> argv[] = { v8Undefined() };
154    v8::Handle<v8::Value> result = callDebuggerMethod("pauseOnExceptionsState", 0, argv);
155    return static_cast<ScriptDebugServer::PauseOnExceptionsState>(result->Int32Value());
156}
157
158void ScriptDebugServer::setPauseOnExceptionsState(PauseOnExceptionsState pauseOnExceptionsState)
159{
160    ensureDebuggerScriptCompiled();
161    v8::HandleScope scope(m_isolate);
162    v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
163
164    v8::Handle<v8::Value> argv[] = { v8::Int32::New(pauseOnExceptionsState, m_isolate) };
165    callDebuggerMethod("setPauseOnExceptionsState", 1, argv);
166}
167
168void ScriptDebugServer::setPauseOnNextStatement(bool pause)
169{
170    if (isPaused())
171        return;
172    if (pause)
173        v8::Debug::DebugBreak(m_isolate);
174    else
175        v8::Debug::CancelDebugBreak(m_isolate);
176}
177
178bool ScriptDebugServer::canBreakProgram()
179{
180    if (!m_breakpointsActivated)
181        return false;
182    v8::HandleScope scope(m_isolate);
183    return !m_isolate->GetCurrentContext().IsEmpty();
184}
185
186void ScriptDebugServer::breakProgram()
187{
188    if (!canBreakProgram())
189        return;
190
191    v8::HandleScope scope(m_isolate);
192    if (m_breakProgramCallbackTemplate.isEmpty()) {
193        v8::Handle<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(m_isolate);
194        templ->SetCallHandler(&ScriptDebugServer::breakProgramCallback, v8::External::New(m_isolate, this));
195        m_breakProgramCallbackTemplate.set(m_isolate, templ);
196    }
197
198    m_pausedContext = m_isolate->GetCurrentContext();
199    v8::Handle<v8::Function> breakProgramFunction = m_breakProgramCallbackTemplate.newLocal(m_isolate)->GetFunction();
200    v8::Debug::Call(breakProgramFunction);
201    m_pausedContext.Clear();
202}
203
204void ScriptDebugServer::continueProgram()
205{
206    if (isPaused())
207        quitMessageLoopOnPause();
208    m_executionState.clear();
209}
210
211void ScriptDebugServer::stepIntoStatement()
212{
213    ASSERT(isPaused());
214    v8::HandleScope handleScope(m_isolate);
215    v8::Handle<v8::Value> argv[] = { m_executionState.newLocal(m_isolate) };
216    callDebuggerMethod(stepIntoV8MethodName, 1, argv);
217    continueProgram();
218}
219
220void ScriptDebugServer::stepCommandWithFrame(const char* functionName, const ScriptValue& frame)
221{
222    ASSERT(isPaused());
223    v8::HandleScope handleScope(m_isolate);
224    v8::Handle<v8::Value> callFrame;
225    if (frame.hasNoValue()) {
226        callFrame = v8::Undefined(m_isolate);
227    } else {
228        JavaScriptCallFrame* impl = V8JavaScriptCallFrame::toNative(v8::Handle<v8::Object>::Cast(frame.v8Value()));
229        callFrame = impl->innerCallFrame();
230    }
231
232    v8::Handle<v8::Value> argv[] = {
233        m_executionState.newLocal(m_isolate),
234        callFrame
235    };
236
237    callDebuggerMethod(functionName, 2, argv);
238    continueProgram();
239}
240
241void ScriptDebugServer::stepOverStatement(const ScriptValue& frame)
242{
243    stepCommandWithFrame("stepOverStatement", frame);
244}
245
246void ScriptDebugServer::stepOutOfFunction(const ScriptValue& frame)
247{
248    stepCommandWithFrame(stepOutV8MethodName, frame);
249}
250
251bool ScriptDebugServer::setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>& errorData, ScriptValue* newCallFrames, ScriptObject* result)
252{
253    class EnableLiveEditScope {
254    public:
255        EnableLiveEditScope() { v8::Debug::SetLiveEditEnabled(true); }
256        ~EnableLiveEditScope() { v8::Debug::SetLiveEditEnabled(false); }
257    };
258
259    ensureDebuggerScriptCompiled();
260    v8::HandleScope scope(m_isolate);
261
262    OwnPtr<v8::Context::Scope> contextScope;
263    v8::Handle<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
264    if (!isPaused())
265        contextScope = adoptPtr(new v8::Context::Scope(debuggerContext));
266
267    v8::Handle<v8::Value> argv[] = { v8String(debuggerContext->GetIsolate(), sourceID), v8String(debuggerContext->GetIsolate(), newContent), v8Boolean(preview, debuggerContext->GetIsolate()) };
268
269    v8::Local<v8::Value> v8result;
270    {
271        EnableLiveEditScope enableLiveEditScope;
272        v8::TryCatch tryCatch;
273        tryCatch.SetVerbose(false);
274        v8result = callDebuggerMethod("liveEditScriptSource", 3, argv);
275        if (tryCatch.HasCaught()) {
276            v8::Local<v8::Message> message = tryCatch.Message();
277            if (!message.IsEmpty())
278                *error = toCoreStringWithUndefinedOrNullCheck(message->Get());
279            else
280                *error = "Unknown error.";
281            return false;
282        }
283    }
284    ASSERT(!v8result.IsEmpty());
285    v8::Local<v8::Object> resultTuple = v8result->ToObject();
286    int code = static_cast<int>(resultTuple->Get(0)->ToInteger()->Value());
287    switch (code) {
288    case 0:
289        {
290            v8::Local<v8::Value> normalResult = resultTuple->Get(1);
291            if (normalResult->IsObject())
292                *result = ScriptObject(ScriptState::current(), normalResult->ToObject());
293            // Call stack may have changed after if the edited function was on the stack.
294            if (!preview && isPaused())
295                *newCallFrames = currentCallFrames();
296            return true;
297        }
298    // Compile error.
299    case 1:
300        {
301            RefPtr<TypeBuilder::Debugger::SetScriptSourceError::CompileError> compileError =
302                TypeBuilder::Debugger::SetScriptSourceError::CompileError::create()
303                    .setMessage(toCoreStringWithUndefinedOrNullCheck(resultTuple->Get(2)))
304                    .setLineNumber(resultTuple->Get(3)->ToInteger()->Value())
305                    .setColumnNumber(resultTuple->Get(4)->ToInteger()->Value());
306
307            *error = toCoreStringWithUndefinedOrNullCheck(resultTuple->Get(1));
308            errorData = TypeBuilder::Debugger::SetScriptSourceError::create();
309            errorData->setCompileError(compileError);
310            return false;
311        }
312    }
313    *error = "Unknown error.";
314    return false;
315}
316
317PassRefPtr<JavaScriptCallFrame> ScriptDebugServer::wrapCallFrames(v8::Handle<v8::Object> executionState, int maximumLimit)
318{
319    v8::Handle<v8::Value> currentCallFrameV8;
320    if (executionState.IsEmpty()) {
321        v8::Handle<v8::Function> currentCallFrameFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "currentCallFrame")));
322        currentCallFrameV8 = v8::Debug::Call(currentCallFrameFunction, v8::Integer::New(maximumLimit, m_isolate));
323    } else {
324        v8::Handle<v8::Value> argv[] = { executionState, v8::Integer::New(maximumLimit, m_isolate) };
325        currentCallFrameV8 = callDebuggerMethod("currentCallFrame", 2, argv);
326    }
327    ASSERT(!currentCallFrameV8.IsEmpty());
328    if (!currentCallFrameV8->IsObject())
329        return PassRefPtr<JavaScriptCallFrame>();
330    return JavaScriptCallFrame::create(v8::Debug::GetDebugContext(), v8::Handle<v8::Object>::Cast(currentCallFrameV8));
331}
332
333ScriptValue ScriptDebugServer::currentCallFrames()
334{
335    v8::HandleScope scope(m_isolate);
336    v8::Handle<v8::Context> pausedContext = m_pausedContext.IsEmpty() ? m_isolate->GetCurrentContext() : m_pausedContext;
337    if (pausedContext.IsEmpty())
338        return ScriptValue();
339
340    RefPtr<JavaScriptCallFrame> currentCallFrame = wrapCallFrames(m_executionState.newLocal(m_isolate), -1);
341    if (!currentCallFrame)
342        return ScriptValue();
343
344    v8::Context::Scope contextScope(pausedContext);
345    return ScriptValue(toV8(currentCallFrame.release(), v8::Handle<v8::Object>(), pausedContext->GetIsolate()), pausedContext->GetIsolate());
346}
347
348void ScriptDebugServer::interruptAndRun(PassOwnPtr<Task> task, v8::Isolate* isolate)
349{
350    v8::Debug::DebugBreakForCommand(new ClientDataImpl(task), isolate);
351}
352
353void ScriptDebugServer::runPendingTasks()
354{
355    v8::Debug::ProcessDebugMessages();
356}
357
358static ScriptDebugServer* toScriptDebugServer(v8::Handle<v8::Value> data)
359{
360    void* p = v8::Handle<v8::External>::Cast(data)->Value();
361    return static_cast<ScriptDebugServer*>(p);
362}
363
364void ScriptDebugServer::breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
365{
366    ASSERT(2 == info.Length());
367    ScriptDebugServer* thisPtr = toScriptDebugServer(info.Data());
368    v8::Handle<v8::Value> exception;
369    v8::Handle<v8::Array> hitBreakpoints;
370    thisPtr->handleProgramBreak(v8::Handle<v8::Object>::Cast(info[0]), exception, hitBreakpoints);
371}
372
373void ScriptDebugServer::handleProgramBreak(v8::Handle<v8::Object> executionState, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpointNumbers)
374{
375    // Don't allow nested breaks.
376    if (isPaused())
377        return;
378
379    ScriptDebugListener* listener = getDebugListenerForContext(m_pausedContext);
380    if (!listener)
381        return;
382
383    Vector<String> breakpointIds;
384    if (!hitBreakpointNumbers.IsEmpty()) {
385        breakpointIds.resize(hitBreakpointNumbers->Length());
386        for (size_t i = 0; i < hitBreakpointNumbers->Length(); i++) {
387            v8::Handle<v8::Value> hitBreakpointNumber = hitBreakpointNumbers->Get(i);
388            ASSERT(!hitBreakpointNumber.IsEmpty() && hitBreakpointNumber->IsInt32());
389            breakpointIds[i] = String::number(hitBreakpointNumber->Int32Value());
390        }
391    }
392
393    m_executionState.set(m_isolate, executionState);
394    ScriptState* currentCallFrameState = ScriptState::forContext(m_pausedContext);
395    listener->didPause(currentCallFrameState, currentCallFrames(), ScriptValue(exception, currentCallFrameState->isolate()), breakpointIds);
396
397    m_runningNestedMessageLoop = true;
398    runMessageLoopOnPause(m_pausedContext);
399    m_runningNestedMessageLoop = false;
400}
401
402void ScriptDebugServer::handleProgramBreak(const v8::Debug::EventDetails& eventDetails, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpointNumbers)
403{
404    m_pausedContext = eventDetails.GetEventContext();
405    handleProgramBreak(eventDetails.GetExecutionState(), exception, hitBreakpointNumbers);
406    m_pausedContext.Clear();
407}
408
409void ScriptDebugServer::v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails)
410{
411    ScriptDebugServer* thisPtr = toScriptDebugServer(eventDetails.GetCallbackData());
412    thisPtr->handleV8DebugEvent(eventDetails);
413}
414
415bool ScriptDebugServer::executeSkipPauseRequest(ScriptDebugListener::SkipPauseRequest request, v8::Handle<v8::Object> executionState)
416{
417    switch (request) {
418    case ScriptDebugListener::NoSkip:
419        return false;
420    case ScriptDebugListener::Continue:
421        return true;
422    case ScriptDebugListener::StepInto:
423    case ScriptDebugListener::StepOut:
424        break;
425    }
426    v8::Handle<v8::Value> argv[] = { executionState };
427    callDebuggerMethod(stepIntoV8MethodName, 1, argv);
428    return true;
429}
430
431void ScriptDebugServer::handleV8DebugEvent(const v8::Debug::EventDetails& eventDetails)
432{
433    v8::DebugEvent event = eventDetails.GetEvent();
434
435    if (event == v8::BreakForCommand) {
436        ClientDataImpl* data = static_cast<ClientDataImpl*>(eventDetails.GetClientData());
437        data->task()->run();
438        return;
439    }
440
441    if (event != v8::Break && event != v8::Exception && event != v8::AfterCompile && event != v8::BeforeCompile)
442        return;
443
444    v8::Handle<v8::Context> eventContext = eventDetails.GetEventContext();
445    ASSERT(!eventContext.IsEmpty());
446
447    ScriptDebugListener* listener = getDebugListenerForContext(eventContext);
448    if (listener) {
449        v8::HandleScope scope(m_isolate);
450        v8::Handle<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
451        if (event == v8::BeforeCompile) {
452            preprocessBeforeCompile(eventDetails);
453        } else if (event == v8::AfterCompile) {
454            v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
455            v8::Handle<v8::Function> getAfterCompileScript = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, "getAfterCompileScript")));
456            v8::Handle<v8::Value> argv[] = { eventDetails.GetEventData() };
457            v8::Handle<v8::Value> value = V8ScriptRunner::callInternalFunction(getAfterCompileScript, debuggerScript, WTF_ARRAY_LENGTH(argv), argv, m_isolate);
458            ASSERT(value->IsObject());
459            v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(value);
460            dispatchDidParseSource(listener, object);
461        } else if (event == v8::Exception) {
462            v8::Local<v8::StackTrace> stackTrace = v8::StackTrace::CurrentStackTrace(m_isolate, 1);
463            // Stack trace is empty in case of syntax error. Silently continue execution in such cases.
464            if (!stackTrace->GetFrameCount())
465                return;
466            RefPtr<JavaScriptCallFrame> topFrame = wrapCallFrames(eventDetails.GetExecutionState(), 1);
467            if (executeSkipPauseRequest(listener->shouldSkipExceptionPause(topFrame), eventDetails.GetExecutionState()))
468                return;
469            v8::Handle<v8::Object> eventData = eventDetails.GetEventData();
470            v8::Handle<v8::Value> exceptionGetterValue = eventData->Get(v8AtomicString(m_isolate, "exception"));
471            ASSERT(!exceptionGetterValue.IsEmpty() && exceptionGetterValue->IsFunction());
472            v8::Handle<v8::Value> exception = V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function>::Cast(exceptionGetterValue), eventData, 0, 0, m_isolate);
473            handleProgramBreak(eventDetails, exception, v8::Handle<v8::Array>());
474        } else if (event == v8::Break) {
475            v8::Handle<v8::Function> getBreakpointNumbersFunction = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, "getBreakpointNumbers")));
476            v8::Handle<v8::Value> argv[] = { eventDetails.GetEventData() };
477            v8::Handle<v8::Value> hitBreakpoints = V8ScriptRunner::callInternalFunction(getBreakpointNumbersFunction, debuggerScript, WTF_ARRAY_LENGTH(argv), argv, m_isolate);
478            ASSERT(hitBreakpoints->IsArray());
479            RefPtr<JavaScriptCallFrame> topFrame = wrapCallFrames(eventDetails.GetExecutionState(), 1);
480            ScriptDebugListener::SkipPauseRequest skipRequest;
481            if (v8::Handle<v8::Array>::Cast(hitBreakpoints)->Length())
482                skipRequest = listener->shouldSkipBreakpointPause(topFrame);
483            else
484                skipRequest = listener->shouldSkipStepPause(topFrame);
485            if (executeSkipPauseRequest(skipRequest, eventDetails.GetExecutionState()))
486                return;
487            handleProgramBreak(eventDetails, v8::Handle<v8::Value>(), hitBreakpoints.As<v8::Array>());
488        }
489    }
490}
491
492void ScriptDebugServer::dispatchDidParseSource(ScriptDebugListener* listener, v8::Handle<v8::Object> object)
493{
494    v8::Handle<v8::Value> id = object->Get(v8AtomicString(m_isolate, "id"));
495    ASSERT(!id.IsEmpty() && id->IsInt32());
496    String sourceID = String::number(id->Int32Value());
497
498    ScriptDebugListener::Script script;
499    script.url = toCoreStringWithUndefinedOrNullCheck(object->Get(v8AtomicString(m_isolate, "name")));
500    script.source = toCoreStringWithUndefinedOrNullCheck(object->Get(v8AtomicString(m_isolate, "source")));
501    script.sourceMappingURL = toCoreStringWithUndefinedOrNullCheck(object->Get(v8AtomicString(m_isolate, "sourceMappingURL")));
502    script.startLine = object->Get(v8AtomicString(m_isolate, "startLine"))->ToInteger()->Value();
503    script.startColumn = object->Get(v8AtomicString(m_isolate, "startColumn"))->ToInteger()->Value();
504    script.endLine = object->Get(v8AtomicString(m_isolate, "endLine"))->ToInteger()->Value();
505    script.endColumn = object->Get(v8AtomicString(m_isolate, "endColumn"))->ToInteger()->Value();
506    script.isContentScript = object->Get(v8AtomicString(m_isolate, "isContentScript"))->ToBoolean()->Value();
507
508    listener->didParseSource(sourceID, script);
509}
510
511void ScriptDebugServer::ensureDebuggerScriptCompiled()
512{
513    if (!m_debuggerScript.isEmpty())
514        return;
515
516    v8::HandleScope scope(m_isolate);
517    v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
518    v8::Handle<v8::String> source = v8String(m_isolate, String(reinterpret_cast<const char*>(DebuggerScriptSource_js), sizeof(DebuggerScriptSource_js)));
519    v8::Local<v8::Value> value = V8ScriptRunner::compileAndRunInternalScript(source, m_isolate);
520    ASSERT(!value.IsEmpty());
521    ASSERT(value->IsObject());
522    m_debuggerScript.set(m_isolate, v8::Handle<v8::Object>::Cast(value));
523}
524
525v8::Local<v8::Value> ScriptDebugServer::functionScopes(v8::Handle<v8::Function> function)
526{
527    ensureDebuggerScriptCompiled();
528
529    v8::Handle<v8::Value> argv[] = { function };
530    return callDebuggerMethod("getFunctionScopes", 1, argv);
531}
532
533v8::Local<v8::Value> ScriptDebugServer::getInternalProperties(v8::Handle<v8::Object>& object)
534{
535    if (m_debuggerScript.isEmpty())
536        return v8::Local<v8::Value>::New(m_isolate, v8::Undefined(m_isolate));
537
538    v8::Handle<v8::Value> argv[] = { object };
539    return callDebuggerMethod("getInternalProperties", 1, argv);
540}
541
542v8::Handle<v8::Value> ScriptDebugServer::setFunctionVariableValue(v8::Handle<v8::Value> functionValue, int scopeNumber, const String& variableName, v8::Handle<v8::Value> newValue)
543{
544    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
545    if (m_debuggerScript.isEmpty())
546        return m_isolate->ThrowException(v8::String::NewFromUtf8(m_isolate, "Debugging is not enabled."));
547
548    v8::Handle<v8::Value> argv[] = {
549        functionValue,
550        v8::Handle<v8::Value>(v8::Integer::New(scopeNumber, debuggerContext->GetIsolate())),
551        v8String(debuggerContext->GetIsolate(), variableName),
552        newValue
553    };
554    return callDebuggerMethod("setFunctionVariableValue", 4, argv);
555}
556
557
558bool ScriptDebugServer::isPaused()
559{
560    return !m_executionState.isEmpty();
561}
562
563void ScriptDebugServer::compileScript(ScriptState* state, const String& expression, const String& sourceURL, String* scriptId, String* exceptionMessage)
564{
565    v8::HandleScope handleScope(m_isolate);
566    v8::Handle<v8::Context> context = state->context();
567    if (context.IsEmpty())
568        return;
569    v8::Context::Scope contextScope(context);
570
571    v8::Handle<v8::String> source = v8String(m_isolate, expression);
572    v8::TryCatch tryCatch;
573    v8::Local<v8::Script> script = V8ScriptRunner::compileScript(source, sourceURL, TextPosition(), 0, m_isolate);
574    if (tryCatch.HasCaught()) {
575        v8::Local<v8::Message> message = tryCatch.Message();
576        if (!message.IsEmpty())
577            *exceptionMessage = toCoreStringWithUndefinedOrNullCheck(message->Get());
578        return;
579    }
580    if (script.IsEmpty())
581        return;
582
583    *scriptId = String::number(script->GetId());
584    m_compiledScripts.set(*scriptId, adoptPtr(new ScopedPersistent<v8::Script>(m_isolate, script)));
585}
586
587void ScriptDebugServer::clearCompiledScripts()
588{
589    m_compiledScripts.clear();
590}
591
592void ScriptDebugServer::runScript(ScriptState* state, const String& scriptId, ScriptValue* result, bool* wasThrown, String* exceptionMessage)
593{
594    if (!m_compiledScripts.contains(scriptId))
595        return;
596    v8::HandleScope handleScope(m_isolate);
597    ScopedPersistent<v8::Script>* scriptHandle = m_compiledScripts.get(scriptId);
598    v8::Local<v8::Script> script = scriptHandle->newLocal(m_isolate);
599    m_compiledScripts.remove(scriptId);
600    if (script.IsEmpty())
601        return;
602
603    v8::Handle<v8::Context> context = state->context();
604    if (context.IsEmpty())
605        return;
606    v8::Context::Scope contextScope(context);
607    v8::TryCatch tryCatch;
608    v8::Local<v8::Value> value = V8ScriptRunner::runCompiledScript(script, state->executionContext(), m_isolate);
609    *wasThrown = false;
610    if (tryCatch.HasCaught()) {
611        *wasThrown = true;
612        *result = ScriptValue(tryCatch.Exception(), m_isolate);
613        v8::Local<v8::Message> message = tryCatch.Message();
614        if (!message.IsEmpty())
615            *exceptionMessage = toCoreStringWithUndefinedOrNullCheck(message->Get());
616    } else {
617        *result = ScriptValue(value, m_isolate);
618    }
619}
620
621PassOwnPtr<ScriptSourceCode> ScriptDebugServer::preprocess(Frame*, const ScriptSourceCode&)
622{
623    return PassOwnPtr<ScriptSourceCode>();
624}
625
626String ScriptDebugServer::preprocessEventListener(Frame*, const String& source, const String& url, const String& functionName)
627{
628    return source;
629}
630
631} // namespace WebCore
632