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

   1 /*
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   3  *
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   6  * met:
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   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.
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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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  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 "platform/JSONValues.h"
  45 #include "wtf/StdLibExtras.h"
  46 #include "wtf/Vector.h"
  47 #include "wtf/dtoa/utils.h"
  48 #include "wtf/text/CString.h"
  49
  50 namespace WebCore {
  51
  52 namespace {
  53
  54 class ClientDataImpl : public v8::Debug::ClientData {
  55 public:
  56     ClientDataImpl(PassOwnPtr<ScriptDebugServer::Task> task) : m_task(task) { }
  57     virtual ~ClientDataImpl() { }
  58     ScriptDebugServer::Task* task() const { return m_task.get(); }
  59 private:
  60     OwnPtr<ScriptDebugServer::Task> m_task;
  61 };
  62
  63 const char stepIntoV8MethodName[] = "stepIntoStatement";
  64 const char stepOutV8MethodName[] = "stepOutOfFunction";
  65 }
  66
  67 v8::Local<v8::Value> ScriptDebugServer::callDebuggerMethod(const char* functionName, int argc, v8::Handle<v8::Value> argv[])
  68 {
  69     v8::Handle<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
  70     v8::Handle<v8::Function> function = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, functionName)));
  71     ASSERT(m_isolate->InContext());
  72     return V8ScriptRunner::callInternalFunction(function, debuggerScript, argc, argv, m_isolate);
  73 }
  74
  75 ScriptDebugServer::ScriptDebugServer(v8::Isolate* isolate)
  76     : m_pauseOnExceptionsState(DontPauseOnExceptions)
  77     , m_breakpointsActivated(true)
  78     , m_isolate(isolate)
  79     , m_runningNestedMessageLoop(false)
  80 {
  81 }
  82
  83 ScriptDebugServer::~ScriptDebugServer()
  84 {
  85 }
  86
  87 String ScriptDebugServer::setBreakpoint(const String& sourceID, const ScriptBreakpoint& scriptBreakpoint, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation)
  88 {
  89     v8::HandleScope scope(m_isolate);
  90     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
  91     v8::Context::Scope contextScope(debuggerContext);
  92
  93     v8::Local<v8::Object> info = v8::Object::New(m_isolate);
  94     info->Set(v8AtomicString(m_isolate, "sourceID"), v8String(debuggerContext->GetIsolate(), sourceID));
  95     info->Set(v8AtomicString(m_isolate, "lineNumber"), v8::Integer::New(debuggerContext->GetIsolate(), scriptBreakpoint.lineNumber));
  96     info->Set(v8AtomicString(m_isolate, "columnNumber"), v8::Integer::New(debuggerContext->GetIsolate(), scriptBreakpoint.columnNumber));
  97     info->Set(v8AtomicString(m_isolate, "interstatementLocation"), v8Boolean(interstatementLocation, debuggerContext->GetIsolate()));
  98     info->Set(v8AtomicString(m_isolate, "condition"), v8String(debuggerContext->GetIsolate(), scriptBreakpoint.condition));
  99
 100     v8::Handle<v8::Function> setBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "setBreakpoint")));
 101     v8::Handle<v8::Value> breakpointId = v8::Debug::Call(setBreakpointFunction, info);
 102     if (!breakpointId->IsString())
 103         return "";
 104     *actualLineNumber = info->Get(v8AtomicString(m_isolate, "lineNumber"))->Int32Value();
 105     *actualColumnNumber = info->Get(v8AtomicString(m_isolate, "columnNumber"))->Int32Value();
 106     return toCoreString(breakpointId.As<v8::String>());
 107 }
 108
 109 void ScriptDebugServer::removeBreakpoint(const String& breakpointId)
 110 {
 111     v8::HandleScope scope(m_isolate);
 112     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
 113     v8::Context::Scope contextScope(debuggerContext);
 114
 115     v8::Local<v8::Object> info = v8::Object::New(m_isolate);
 116     info->Set(v8AtomicString(m_isolate, "breakpointId"), v8String(debuggerContext->GetIsolate(), breakpointId));
 117
 118     v8::Handle<v8::Function> removeBreakpointFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "removeBreakpoint")));
 119     v8::Debug::Call(removeBreakpointFunction, info);
 120 }
 121
 122 void ScriptDebugServer::clearBreakpoints()
 123 {
 124     ensureDebuggerScriptCompiled();
 125     v8::HandleScope scope(m_isolate);
 126     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
 127     v8::Context::Scope contextScope(debuggerContext);
 128
 129     v8::Handle<v8::Function> clearBreakpoints = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "clearBreakpoints")));
 130     v8::Debug::Call(clearBreakpoints);
 131 }
 132
 133 void ScriptDebugServer::setBreakpointsActivated(bool activated)
 134 {
 135     ensureDebuggerScriptCompiled();
 136     v8::HandleScope scope(m_isolate);
 137     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
 138     v8::Context::Scope contextScope(debuggerContext);
 139
 140     v8::Local<v8::Object> info = v8::Object::New(m_isolate);
 141     info->Set(v8AtomicString(m_isolate, "enabled"), v8::Boolean::New(m_isolate, activated));
 142     v8::Handle<v8::Function> setBreakpointsActivated = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "setBreakpointsActivated")));
 143     v8::Debug::Call(setBreakpointsActivated, info);
 144
 145     m_breakpointsActivated = activated;
 146 }
 147
 148 ScriptDebugServer::PauseOnExceptionsState ScriptDebugServer::pauseOnExceptionsState()
 149 {
 150     ensureDebuggerScriptCompiled();
 151     v8::HandleScope scope(m_isolate);
 152     v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
 153
 154     v8::Handle<v8::Value> argv[] = { v8Undefined() };
 155     v8::Handle<v8::Value> result = callDebuggerMethod("pauseOnExceptionsState", 0, argv);
 156     return static_cast<ScriptDebugServer::PauseOnExceptionsState>(result->Int32Value());
 157 }
 158
 159 void ScriptDebugServer::setPauseOnExceptionsState(PauseOnExceptionsState pauseOnExceptionsState)
 160 {
 161     ensureDebuggerScriptCompiled();
 162     v8::HandleScope scope(m_isolate);
 163     v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
 164
 165     v8::Handle<v8::Value> argv[] = { v8::Int32::New(m_isolate, pauseOnExceptionsState) };
 166     callDebuggerMethod("setPauseOnExceptionsState", 1, argv);
 167 }
 168
 169 void ScriptDebugServer::setPauseOnNextStatement(bool pause)
 170 {
 171     if (isPaused())
 172         return;
 173     if (pause)
 174         v8::Debug::DebugBreak(m_isolate);
 175     else
 176         v8::Debug::CancelDebugBreak(m_isolate);
 177 }
 178
 179 bool ScriptDebugServer::canBreakProgram()
 180 {
 181     if (!m_breakpointsActivated)
 182         return false;
 183     v8::HandleScope scope(m_isolate);
 184     return !m_isolate->GetCurrentContext().IsEmpty();
 185 }
 186
 187 void ScriptDebugServer::breakProgram()
 188 {
 189     if (!canBreakProgram())
 190         return;
 191
 192     v8::HandleScope scope(m_isolate);
 193     if (m_breakProgramCallbackTemplate.isEmpty()) {
 194         v8::Handle<v8::FunctionTemplate> templ = v8::FunctionTemplate::New(m_isolate);
 195         templ->SetCallHandler(&ScriptDebugServer::breakProgramCallback, v8::External::New(m_isolate, this));
 196         m_breakProgramCallbackTemplate.set(m_isolate, templ);
 197     }
 198
 199     m_pausedContext = m_isolate->GetCurrentContext();
 200     v8::Handle<v8::Function> breakProgramFunction = m_breakProgramCallbackTemplate.newLocal(m_isolate)->GetFunction();
 201     v8::Debug::Call(breakProgramFunction);
 202     m_pausedContext.Clear();
 203 }
 204
 205 void ScriptDebugServer::continueProgram()
 206 {
 207     if (isPaused())
 208         quitMessageLoopOnPause();
 209     m_executionState.clear();
 210 }
 211
 212 void ScriptDebugServer::stepIntoStatement()
 213 {
 214     ASSERT(isPaused());
 215     v8::HandleScope handleScope(m_isolate);
 216     v8::Handle<v8::Value> argv[] = { m_executionState.newLocal(m_isolate) };
 217     callDebuggerMethod(stepIntoV8MethodName, 1, argv);
 218     continueProgram();
 219 }
 220
 221 void ScriptDebugServer::stepCommandWithFrame(const char* functionName, const ScriptValue& frame)
 222 {
 223     ASSERT(isPaused());
 224     v8::HandleScope handleScope(m_isolate);
 225     v8::Handle<v8::Value> callFrame;
 226     if (frame.isEmpty()) {
 227         callFrame = v8::Undefined(m_isolate);
 228     } else {
 229         JavaScriptCallFrame* impl = V8JavaScriptCallFrame::toNative(v8::Handle<v8::Object>::Cast(frame.v8Value()));
 230         callFrame = impl->innerCallFrame();
 231     }
 232
 233     v8::Handle<v8::Value> argv[] = {
 234         m_executionState.newLocal(m_isolate),
 235         callFrame
 236     };
 237
 238     callDebuggerMethod(functionName, 2, argv);
 239     continueProgram();
 240 }
 241
 242 void ScriptDebugServer::stepOverStatement(const ScriptValue& frame)
 243 {
 244     stepCommandWithFrame("stepOverStatement", frame);
 245 }
 246
 247 void ScriptDebugServer::stepOutOfFunction(const ScriptValue& frame)
 248 {
 249     stepCommandWithFrame(stepOutV8MethodName, frame);
 250 }
 251
 252 bool ScriptDebugServer::setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>& errorData, ScriptValue* newCallFrames, RefPtr<JSONObject>* result)
 253 {
 254     class EnableLiveEditScope {
 255     public:
 256         explicit EnableLiveEditScope(v8::Isolate* isolate) : m_isolate(isolate) { v8::Debug::SetLiveEditEnabled(m_isolate, true); }
 257         ~EnableLiveEditScope() { v8::Debug::SetLiveEditEnabled(m_isolate, false); }
 258     private:
 259         v8::Isolate* m_isolate;
 260     };
 261
 262     ensureDebuggerScriptCompiled();
 263     v8::HandleScope scope(m_isolate);
 264
 265     OwnPtr<v8::Context::Scope> contextScope;
 266     v8::Handle<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
 267     if (!isPaused())
 268         contextScope = adoptPtr(new v8::Context::Scope(debuggerContext));
 269
 270     v8::Handle<v8::Value> argv[] = { v8String(m_isolate, sourceID), v8String(m_isolate, newContent), v8Boolean(preview, m_isolate) };
 271
 272     v8::Local<v8::Value> v8result;
 273     {
 274         EnableLiveEditScope enableLiveEditScope(m_isolate);
 275         v8::TryCatch tryCatch;
 276         tryCatch.SetVerbose(false);
 277         v8result = callDebuggerMethod("liveEditScriptSource", 3, argv);
 278         if (tryCatch.HasCaught()) {
 279             v8::Local<v8::Message> message = tryCatch.Message();
 280             if (!message.IsEmpty())
 281                 *error = toCoreStringWithUndefinedOrNullCheck(message->Get());
 282             else
 283                 *error = "Unknown error.";
 284             return false;
 285         }
 286     }
 287     ASSERT(!v8result.IsEmpty());
 288     v8::Local<v8::Object> resultTuple = v8result->ToObject();
 289     int code = static_cast<int>(resultTuple->Get(0)->ToInteger()->Value());
 290     switch (code) {
 291     case 0:
 292         {
 293             v8::Local<v8::Value> normalResult = resultTuple->Get(1);
 294             RefPtr<JSONValue> jsonResult = v8ToJSONValue(m_isolate, normalResult, JSONValue::maxDepth);
 295             if (jsonResult)
 296                 *result = jsonResult->asObject();
 297             // Call stack may have changed after if the edited function was on the stack.
 298             if (!preview && isPaused())
 299                 *newCallFrames = currentCallFrames();
 300             return true;
 301         }
 302     // Compile error.
 303     case 1:
 304         {
 305             RefPtr<TypeBuilder::Debugger::SetScriptSourceError::CompileError> compileError =
 306                 TypeBuilder::Debugger::SetScriptSourceError::CompileError::create()
 307                     .setMessage(toCoreStringWithUndefinedOrNullCheck(resultTuple->Get(2)))
 308                     .setLineNumber(resultTuple->Get(3)->ToInteger()->Value())
 309                     .setColumnNumber(resultTuple->Get(4)->ToInteger()->Value());
 310
 311             *error = toCoreStringWithUndefinedOrNullCheck(resultTuple->Get(1));
 312             errorData = TypeBuilder::Debugger::SetScriptSourceError::create();
 313             errorData->setCompileError(compileError);
 314             return false;
 315         }
 316     }
 317     *error = "Unknown error.";
 318     return false;
 319 }
 320
 321 PassRefPtr<JavaScriptCallFrame> ScriptDebugServer::wrapCallFrames(v8::Handle<v8::Object> executionState, int maximumLimit, ScopeInfoDetails scopeDetails)
 322 {
 323     const int scopeBits = 2;
 324     COMPILE_ASSERT(NoScopes < (1 << scopeBits), not_enough_bits_to_encode_ScopeInfoDetails);
 325
 326     int data = (maximumLimit << scopeBits) | scopeDetails;
 327     v8::Handle<v8::Value> currentCallFrameV8;
 328     if (executionState.IsEmpty()) {
 329         v8::Handle<v8::Function> currentCallFrameFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "currentCallFrame")));
 330         currentCallFrameV8 = v8::Debug::Call(currentCallFrameFunction, v8::Integer::New(m_isolate, data));
 331     } else {
 332         v8::Handle<v8::Value> argv[] = { executionState, v8::Integer::New(m_isolate, data) };
 333         currentCallFrameV8 = callDebuggerMethod("currentCallFrame", WTF_ARRAY_LENGTH(argv), argv);
 334     }
 335     ASSERT(!currentCallFrameV8.IsEmpty());
 336     if (!currentCallFrameV8->IsObject())
 337         return PassRefPtr<JavaScriptCallFrame>();
 338     return JavaScriptCallFrame::create(v8::Debug::GetDebugContext(), v8::Handle<v8::Object>::Cast(currentCallFrameV8));
 339 }
 340
 341 ScriptValue ScriptDebugServer::currentCallFramesInner(ScopeInfoDetails scopeDetails)
 342 {
 343     v8::HandleScope scope(m_isolate);
 344     v8::Handle<v8::Context> pausedContext = m_pausedContext.IsEmpty() ? m_isolate->GetCurrentContext() : m_pausedContext;
 345     if (pausedContext.IsEmpty())
 346         return ScriptValue();
 347
 348     RefPtr<JavaScriptCallFrame> currentCallFrame = wrapCallFrames(m_executionState.newLocal(m_isolate), 0, scopeDetails);
 349     if (!currentCallFrame)
 350         return ScriptValue();
 351
 352     v8::Context::Scope contextScope(pausedContext);
 353     return ScriptValue(ScriptState::from(pausedContext), toV8(currentCallFrame.release(), v8::Handle<v8::Object>(), pausedContext->GetIsolate()));
 354 }
 355
 356 ScriptValue ScriptDebugServer::currentCallFrames()
 357 {
 358     return currentCallFramesInner(AllScopes);
 359 }
 360
 361 ScriptValue ScriptDebugServer::currentCallFramesForAsyncStack()
 362 {
 363     return currentCallFramesInner(FastAsyncScopes);
 364 }
 365
 366 void ScriptDebugServer::interruptAndRun(PassOwnPtr<Task> task, v8::Isolate* isolate)
 367 {
 368     v8::Debug::DebugBreakForCommand(isolate, new ClientDataImpl(task));
 369 }
 370
 371 void ScriptDebugServer::runPendingTasks()
 372 {
 373     v8::Debug::ProcessDebugMessages();
 374 }
 375
 376 static ScriptDebugServer* toScriptDebugServer(v8::Handle<v8::Value> data)
 377 {
 378     void* p = v8::Handle<v8::External>::Cast(data)->Value();
 379     return static_cast<ScriptDebugServer*>(p);
 380 }
 381
 382 void ScriptDebugServer::breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 383 {
 384     ASSERT(2 == info.Length());
 385     ScriptDebugServer* thisPtr = toScriptDebugServer(info.Data());
 386     v8::Handle<v8::Value> exception;
 387     v8::Handle<v8::Array> hitBreakpoints;
 388     thisPtr->handleProgramBreak(v8::Handle<v8::Object>::Cast(info[0]), exception, hitBreakpoints);
 389 }
 390
 391 void ScriptDebugServer::handleProgramBreak(v8::Handle<v8::Object> executionState, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpointNumbers)
 392 {
 393     // Don't allow nested breaks.
 394     if (isPaused())
 395         return;
 396
 397     ScriptDebugListener* listener = getDebugListenerForContext(m_pausedContext);
 398     if (!listener)
 399         return;
 400
 401     Vector<String> breakpointIds;
 402     if (!hitBreakpointNumbers.IsEmpty()) {
 403         breakpointIds.resize(hitBreakpointNumbers->Length());
 404         for (size_t i = 0; i < hitBreakpointNumbers->Length(); i++) {
 405             v8::Handle<v8::Value> hitBreakpointNumber = hitBreakpointNumbers->Get(i);
 406             ASSERT(!hitBreakpointNumber.IsEmpty() && hitBreakpointNumber->IsInt32());
 407             breakpointIds[i] = String::number(hitBreakpointNumber->Int32Value());
 408         }
 409     }
 410
 411     m_executionState.set(m_isolate, executionState);
 412     listener->didPause(ScriptState::from(m_pausedContext), currentCallFrames(), ScriptValue(ScriptState::from(m_pausedContext), exception), breakpointIds);
 413
 414     m_runningNestedMessageLoop = true;
 415     runMessageLoopOnPause(m_pausedContext);
 416     m_runningNestedMessageLoop = false;
 417 }
 418
 419 void ScriptDebugServer::handleProgramBreak(const v8::Debug::EventDetails& eventDetails, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpointNumbers)
 420 {
 421     m_pausedContext = eventDetails.GetEventContext();
 422     handleProgramBreak(eventDetails.GetExecutionState(), exception, hitBreakpointNumbers);
 423     m_pausedContext.Clear();
 424 }
 425
 426 void ScriptDebugServer::v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails)
 427 {
 428     ScriptDebugServer* thisPtr = toScriptDebugServer(eventDetails.GetCallbackData());
 429     thisPtr->handleV8DebugEvent(eventDetails);
 430 }
 431
 432 bool ScriptDebugServer::executeSkipPauseRequest(ScriptDebugListener::SkipPauseRequest request, v8::Handle<v8::Object> executionState)
 433 {
 434     if (request == ScriptDebugListener::NoSkip)
 435         return false;
 436     if (request == ScriptDebugListener::Continue)
 437         return true;
 438     ASSERT(request == ScriptDebugListener::StepInto || request == ScriptDebugListener::StepOut);
 439     v8::Handle<v8::Value> argv[] = { executionState };
 440     callDebuggerMethod(request == ScriptDebugListener::StepInto ? stepIntoV8MethodName : stepOutV8MethodName, 1, argv);
 441     return true;
 442 }
 443
 444 void ScriptDebugServer::handleV8DebugEvent(const v8::Debug::EventDetails& eventDetails)
 445 {
 446     v8::DebugEvent event = eventDetails.GetEvent();
 447
 448     if (event == v8::BreakForCommand) {
 449         ClientDataImpl* data = static_cast<ClientDataImpl*>(eventDetails.GetClientData());
 450         data->task()->run();
 451         return;
 452     }
 453
 454     if (event != v8::Break && event != v8::Exception && event != v8::AfterCompile && event != v8::BeforeCompile)
 455         return;
 456
 457     v8::Handle<v8::Context> eventContext = eventDetails.GetEventContext();
 458     ASSERT(!eventContext.IsEmpty());
 459
 460     ScriptDebugListener* listener = getDebugListenerForContext(eventContext);
 461     if (listener) {
 462         v8::HandleScope scope(m_isolate);
 463         v8::Handle<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
 464         if (event == v8::BeforeCompile) {
 465             preprocessBeforeCompile(eventDetails);
 466         } else if (event == v8::AfterCompile) {
 467             v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
 468             v8::Handle<v8::Function> getAfterCompileScript = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, "getAfterCompileScript")));
 469             v8::Handle<v8::Value> argv[] = { eventDetails.GetEventData() };
 470             v8::Handle<v8::Value> value = V8ScriptRunner::callInternalFunction(getAfterCompileScript, debuggerScript, WTF_ARRAY_LENGTH(argv), argv, m_isolate);
 471             ASSERT(value->IsObject());
 472             v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(value);
 473             dispatchDidParseSource(listener, object);
 474         } else if (event == v8::Exception) {
 475             v8::Local<v8::StackTrace> stackTrace = v8::StackTrace::CurrentStackTrace(m_isolate, 1);
 476             // Stack trace is empty in case of syntax error. Silently continue execution in such cases.
 477             if (!stackTrace->GetFrameCount())
 478                 return;
 479             RefPtr<JavaScriptCallFrame> topFrame = wrapCallFrames(eventDetails.GetExecutionState(), 1, NoScopes);
 480             if (executeSkipPauseRequest(listener->shouldSkipExceptionPause(topFrame), eventDetails.GetExecutionState()))
 481                 return;
 482             v8::Handle<v8::Object> eventData = eventDetails.GetEventData();
 483             v8::Handle<v8::Value> exceptionGetterValue = eventData->Get(v8AtomicString(m_isolate, "exception"));
 484             ASSERT(!exceptionGetterValue.IsEmpty() && exceptionGetterValue->IsFunction());
 485             v8::Handle<v8::Value> exception = V8ScriptRunner::callInternalFunction(v8::Handle<v8::Function>::Cast(exceptionGetterValue), eventData, 0, 0, m_isolate);
 486             handleProgramBreak(eventDetails, exception, v8::Handle<v8::Array>());
 487         } else if (event == v8::Break) {
 488             v8::Handle<v8::Function> getBreakpointNumbersFunction = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8AtomicString(m_isolate, "getBreakpointNumbers")));
 489             v8::Handle<v8::Value> argv[] = { eventDetails.GetEventData() };
 490             v8::Handle<v8::Value> hitBreakpoints = V8ScriptRunner::callInternalFunction(getBreakpointNumbersFunction, debuggerScript, WTF_ARRAY_LENGTH(argv), argv, m_isolate);
 491             ASSERT(hitBreakpoints->IsArray());
 492             RefPtr<JavaScriptCallFrame> topFrame = wrapCallFrames(eventDetails.GetExecutionState(), 1, NoScopes);
 493             ScriptDebugListener::SkipPauseRequest skipRequest;
 494             if (v8::Handle<v8::Array>::Cast(hitBreakpoints)->Length())
 495                 skipRequest = listener->shouldSkipBreakpointPause(topFrame);
 496             else
 497                 skipRequest = listener->shouldSkipStepPause(topFrame);
 498             if (executeSkipPauseRequest(skipRequest, eventDetails.GetExecutionState()))
 499                 return;
 500             handleProgramBreak(eventDetails, v8::Handle<v8::Value>(), hitBreakpoints.As<v8::Array>());
 501         }
 502     }
 503 }
 504
 505 void ScriptDebugServer::dispatchDidParseSource(ScriptDebugListener* listener, v8::Handle<v8::Object> object)
 506 {
 507     v8::Handle<v8::Value> id = object->Get(v8AtomicString(m_isolate, "id"));
 508     ASSERT(!id.IsEmpty() && id->IsInt32());
 509     String sourceID = String::number(id->Int32Value());
 510
 511     ScriptDebugListener::Script script;
 512     script.url = toCoreStringWithUndefinedOrNullCheck(object->Get(v8AtomicString(m_isolate, "name")));
 513     script.source = toCoreStringWithUndefinedOrNullCheck(object->Get(v8AtomicString(m_isolate, "source")));
 514     script.sourceMappingURL = toCoreStringWithUndefinedOrNullCheck(object->Get(v8AtomicString(m_isolate, "sourceMappingURL")));
 515     script.startLine = object->Get(v8AtomicString(m_isolate, "startLine"))->ToInteger()->Value();
 516     script.startColumn = object->Get(v8AtomicString(m_isolate, "startColumn"))->ToInteger()->Value();
 517     script.endLine = object->Get(v8AtomicString(m_isolate, "endLine"))->ToInteger()->Value();
 518     script.endColumn = object->Get(v8AtomicString(m_isolate, "endColumn"))->ToInteger()->Value();
 519     script.isContentScript = object->Get(v8AtomicString(m_isolate, "isContentScript"))->ToBoolean()->Value();
 520
 521     listener->didParseSource(sourceID, script);
 522 }
 523
 524 void ScriptDebugServer::ensureDebuggerScriptCompiled()
 525 {
 526     if (!m_debuggerScript.isEmpty())
 527         return;
 528
 529     v8::HandleScope scope(m_isolate);
 530     v8::Context::Scope contextScope(v8::Debug::GetDebugContext());
 531     v8::Handle<v8::String> source = v8String(m_isolate, String(reinterpret_cast<const char*>(DebuggerScriptSource_js), sizeof(DebuggerScriptSource_js)));
 532     v8::Local<v8::Value> value = V8ScriptRunner::compileAndRunInternalScript(source, m_isolate);
 533     ASSERT(!value.IsEmpty());
 534     ASSERT(value->IsObject());
 535     m_debuggerScript.set(m_isolate, v8::Handle<v8::Object>::Cast(value));
 536 }
 537
 538 v8::Local<v8::Value> ScriptDebugServer::functionScopes(v8::Handle<v8::Function> function)
 539 {
 540     ensureDebuggerScriptCompiled();
 541
 542     v8::Handle<v8::Value> argv[] = { function };
 543     return callDebuggerMethod("getFunctionScopes", 1, argv);
 544 }
 545
 546 v8::Local<v8::Value> ScriptDebugServer::getInternalProperties(v8::Handle<v8::Object>& object)
 547 {
 548     if (m_debuggerScript.isEmpty())
 549         return v8::Local<v8::Value>::New(m_isolate, v8::Undefined(m_isolate));
 550
 551     v8::Handle<v8::Value> argv[] = { object };
 552     return callDebuggerMethod("getInternalProperties", 1, argv);
 553 }
 554
 555 v8::Handle<v8::Value> ScriptDebugServer::setFunctionVariableValue(v8::Handle<v8::Value> functionValue, int scopeNumber, const String& variableName, v8::Handle<v8::Value> newValue)
 556 {
 557     v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
 558     if (m_debuggerScript.isEmpty())
 559         return m_isolate->ThrowException(v8::String::NewFromUtf8(m_isolate, "Debugging is not enabled."));
 560
 561     v8::Handle<v8::Value> argv[] = {
 562         functionValue,
 563         v8::Handle<v8::Value>(v8::Integer::New(debuggerContext->GetIsolate(), scopeNumber)),
 564         v8String(debuggerContext->GetIsolate(), variableName),
 565         newValue
 566     };
 567     return callDebuggerMethod("setFunctionVariableValue", 4, argv);
 568 }
 569
 570
 571 bool ScriptDebugServer::isPaused()
 572 {
 573     return !m_executionState.isEmpty();
 574 }
 575
 576 void ScriptDebugServer::compileScript(ScriptState* scriptState, const String& expression, const String& sourceURL, String* scriptId, String* exceptionMessage)
 577 {
 578     if (scriptState->contextIsEmpty())
 579         return;
 580     ScriptState::Scope scope(scriptState);
 581
 582     v8::Handle<v8::String> source = v8String(m_isolate, expression);
 583     v8::TryCatch tryCatch;
 584     v8::Local<v8::Script> script = V8ScriptRunner::compileScript(source, sourceURL, TextPosition(), 0, m_isolate);
 585     if (tryCatch.HasCaught()) {
 586         v8::Local<v8::Message> message = tryCatch.Message();
 587         if (!message.IsEmpty())
 588             *exceptionMessage = toCoreStringWithUndefinedOrNullCheck(message->Get());
 589         return;
 590     }
 591     if (script.IsEmpty())
 592         return;
 593
 594     *scriptId = String::number(script->GetId());
 595     m_compiledScripts.set(*scriptId, adoptPtr(new ScopedPersistent<v8::Script>(m_isolate, script)));
 596 }
 597
 598 void ScriptDebugServer::clearCompiledScripts()
 599 {
 600     m_compiledScripts.clear();
 601 }
 602
 603 void ScriptDebugServer::runScript(ScriptState* scriptState, const String& scriptId, ScriptValue* result, bool* wasThrown, String* exceptionMessage)
 604 {
 605     if (!m_compiledScripts.contains(scriptId))
 606         return;
 607     v8::HandleScope handleScope(m_isolate);
 608     ScopedPersistent<v8::Script>* scriptHandle = m_compiledScripts.get(scriptId);
 609     v8::Local<v8::Script> script = scriptHandle->newLocal(m_isolate);
 610     m_compiledScripts.remove(scriptId);
 611     if (script.IsEmpty())
 612         return;
 613
 614     if (scriptState->contextIsEmpty())
 615         return;
 616     ScriptState::Scope scope(scriptState);
 617     v8::TryCatch tryCatch;
 618     v8::Local<v8::Value> value = V8ScriptRunner::runCompiledScript(script, scriptState->executionContext(), m_isolate);
 619     *wasThrown = false;
 620     if (tryCatch.HasCaught()) {
 621         *wasThrown = true;
 622         *result = ScriptValue(scriptState, tryCatch.Exception());
 623         v8::Local<v8::Message> message = tryCatch.Message();
 624         if (!message.IsEmpty())
 625             *exceptionMessage = toCoreStringWithUndefinedOrNullCheck(message->Get());
 626     } else {
 627         *result = ScriptValue(scriptState, value);
 628     }
 629 }
 630
 631 PassOwnPtr<ScriptSourceCode> ScriptDebugServer::preprocess(LocalFrame*, const ScriptSourceCode&)
 632 {
 633     return PassOwnPtr<ScriptSourceCode>();
 634 }
 635
 636 String ScriptDebugServer::preprocessEventListener(LocalFrame*, const String& source, const String& url, const String& functionName)
 637 {
 638     return source;
 639 }
 640
 641 } // namespace WebCore