src/third_party/WebKit/Source/bindings/v8/ScriptDebugServer.cpp

   1 /*
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   3  *
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  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
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  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
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  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  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
  49 namespace WebCore {
  50
  51 namespace {
  52
  53 class ClientDataImpl : public v8::Debug::ClientData {
  54 public:
  55     ClientDataImpl(PassOwnPtr<ScriptDebugServer::Task> task) : m_task(task) { }
  56     virtual ~ClientDataImpl() { }
  57     ScriptDebugServer::Task* task() const { return m_task.get(); }
  58 private:
  59     OwnPtr<ScriptDebugServer::Task> m_task;
  60 };
  61
  62 const char stepIntoV8MethodName[] = "stepIntoStatement";
  63 const char stepOutV8MethodName[] = "stepOutOfFunction";
  64 }
  65
  66 v8::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
  74 ScriptDebugServer::ScriptDebugServer(v8::Isolate* isolate)
  75     : m_pauseOnExceptionsState(DontPauseOnExceptions)
  76     , m_breakpointsActivated(true)
  77     , m_isolate(isolate)
  78     , m_runningNestedMessageLoop(false)
  79 {
  80 }
  81
  82 ScriptDebugServer::~ScriptDebugServer()
  83 {
  84 }
  85
  86 String 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(m_isolate);
  93     info->Set(v8AtomicString(m_isolate, "sourceID"), v8String(debuggerContext->GetIsolate(), sourceID));
  94     info->Set(v8AtomicString(m_isolate, "lineNumber"), v8::Integer::New(debuggerContext->GetIsolate(), scriptBreakpoint.lineNumber));
  95     info->Set(v8AtomicString(m_isolate, "columnNumber"), v8::Integer::New(debuggerContext->GetIsolate(), scriptBreakpoint.columnNumber));
  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
 108 void 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(m_isolate);
 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
 121 void 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
 132 void 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(m_isolate);
 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
 147 ScriptDebugServer::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
 158 void 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(m_isolate, pauseOnExceptionsState) };
 165     callDebuggerMethod("setPauseOnExceptionsState", 1, argv);
 166 }
 167
 168 void 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
 178 bool ScriptDebugServer::canBreakProgram()
 179 {
 180     if (!m_breakpointsActivated)
 181         return false;
 182     v8::HandleScope scope(m_isolate);
 183     return !m_isolate->GetCurrentContext().IsEmpty();
 184 }
 185
 186 void 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
 204 void ScriptDebugServer::continueProgram()
 205 {
 206     if (isPaused())
 207         quitMessageLoopOnPause();
 208     m_executionState.clear();
 209 }
 210
 211 void 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
 220 void 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
 241 void ScriptDebugServer::stepOverStatement(const ScriptValue& frame)
 242 {
 243     stepCommandWithFrame("stepOverStatement", frame);
 244 }
 245
 246 void ScriptDebugServer::stepOutOfFunction(const ScriptValue& frame)
 247 {
 248     stepCommandWithFrame(stepOutV8MethodName, frame);
 249 }
 250
 251 bool 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
 317 PassRefPtr<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(m_isolate, maximumLimit));
 323     } else {
 324         v8::Handle<v8::Value> argv[] = { executionState, v8::Integer::New(m_isolate, maximumLimit) };
 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
 333 ScriptValue 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
 348 void ScriptDebugServer::interruptAndRun(PassOwnPtr<Task> task, v8::Isolate* isolate)
 349 {
 350     v8::Debug::DebugBreakForCommand(new ClientDataImpl(task), isolate);
 351 }
 352
 353 void ScriptDebugServer::runPendingTasks()
 354 {
 355     v8::Debug::ProcessDebugMessages();
 356 }
 357
 358 static 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
 364 void 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
 373 void 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
 402 void 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
 409 void ScriptDebugServer::v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails)
 410 {
 411     ScriptDebugServer* thisPtr = toScriptDebugServer(eventDetails.GetCallbackData());
 412     thisPtr->handleV8DebugEvent(eventDetails);
 413 }
 414
 415 bool 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
 431 void 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
 492 void 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
 511 void 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
 525 v8::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
 533 v8::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
 542 v8::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(debuggerContext->GetIsolate(), scopeNumber)),
 551         v8String(debuggerContext->GetIsolate(), variableName),
 552         newValue
 553     };
 554     return callDebuggerMethod("setFunctionVariableValue", 4, argv);
 555 }
 556
 557
 558 bool ScriptDebugServer::isPaused()
 559 {
 560     return !m_executionState.isEmpty();
 561 }
 562
 563 void 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
 587 void ScriptDebugServer::clearCompiledScripts()
 588 {
 589     m_compiledScripts.clear();
 590 }
 591
 592 void 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
 621 PassOwnPtr<ScriptSourceCode> ScriptDebugServer::preprocess(Frame*, const ScriptSourceCode&)
 622 {
 623     return PassOwnPtr<ScriptSourceCode>();
 624 }
 625
 626 String ScriptDebugServer::preprocessEventListener(Frame*, const String& source, const String& url, const String& functionName)
 627 {
 628     return source;
 629 }
 630
 631 } // namespace WebCore