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      1 /*
      2  * Copyright (c) 2010, 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 #ifndef ScriptDebugServer_h
     32 #define ScriptDebugServer_h
     33 
     34 #include "InspectorBackendDispatcher.h"
     35 #include "bindings/v8/ScopedPersistent.h"
     36 #include "core/inspector/ScriptBreakpoint.h"
     37 #include "core/inspector/ScriptDebugListener.h"
     38 #include <v8-debug.h>
     39 #include "wtf/HashMap.h"
     40 #include "wtf/Noncopyable.h"
     41 #include "wtf/PassOwnPtr.h"
     42 #include "wtf/Vector.h"
     43 #include "wtf/text/StringHash.h"
     44 #include "wtf/text/WTFString.h"
     45 
     46 namespace WebCore {
     47 
     48 class ScriptController;
     49 class ScriptDebugListener;
     50 class ScriptObject;
     51 class ScriptSourceCode;
     52 class ScriptState;
     53 class ScriptValue;
     54 class JavaScriptCallFrame;
     55 
     56 class ScriptDebugServer {
     57     WTF_MAKE_NONCOPYABLE(ScriptDebugServer);
     58 public:
     59     String setBreakpoint(const String& sourceID, const ScriptBreakpoint&, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation);
     60     void removeBreakpoint(const String& breakpointId);
     61     void clearBreakpoints();
     62     void setBreakpointsActivated(bool activated);
     63 
     64     enum PauseOnExceptionsState {
     65         DontPauseOnExceptions,
     66         PauseOnAllExceptions,
     67         PauseOnUncaughtExceptions
     68     };
     69     PauseOnExceptionsState pauseOnExceptionsState();
     70     void setPauseOnExceptionsState(PauseOnExceptionsState pauseOnExceptionsState);
     71 
     72     void setPauseOnNextStatement(bool pause);
     73     bool canBreakProgram();
     74     void breakProgram();
     75     void continueProgram();
     76     void stepIntoStatement();
     77     void stepOverStatement(const ScriptValue& frame);
     78     void stepOutOfFunction(const ScriptValue& frame);
     79 
     80     bool setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>&, ScriptValue* newCallFrames, ScriptObject* result);
     81     ScriptValue currentCallFrames();
     82 
     83     class Task {
     84     public:
     85         virtual ~Task() { }
     86         virtual void run() = 0;
     87     };
     88     static void interruptAndRun(PassOwnPtr<Task>, v8::Isolate*);
     89     void runPendingTasks();
     90 
     91     bool isPaused();
     92     bool runningNestedMessageLoop() { return m_runningNestedMessageLoop; }
     93 
     94     v8::Local<v8::Value> functionScopes(v8::Handle<v8::Function>);
     95     v8::Local<v8::Value> getInternalProperties(v8::Handle<v8::Object>&);
     96     v8::Handle<v8::Value> setFunctionVariableValue(v8::Handle<v8::Value> functionValue, int scopeNumber, const String& variableName, v8::Handle<v8::Value> newValue);
     97     v8::Local<v8::Value> callDebuggerMethod(const char* functionName, int argc, v8::Handle<v8::Value> argv[]);
     98 
     99     virtual void compileScript(ScriptState*, const String& expression, const String& sourceURL, String* scriptId, String* exceptionMessage);
    100     virtual void clearCompiledScripts();
    101     virtual void runScript(ScriptState*, const String& scriptId, ScriptValue* result, bool* wasThrown, String* exceptionMessage);
    102     virtual void setPreprocessorSource(const String&) { }
    103     virtual void preprocessBeforeCompile(const v8::Debug::EventDetails&) { }
    104     virtual PassOwnPtr<ScriptSourceCode> preprocess(Frame*, const ScriptSourceCode&);
    105     virtual String preprocessEventListener(Frame*, const String& source, const String& url, const String& functionName);
    106 
    107 protected:
    108     explicit ScriptDebugServer(v8::Isolate*);
    109     virtual ~ScriptDebugServer();
    110 
    111     virtual ScriptDebugListener* getDebugListenerForContext(v8::Handle<v8::Context>) = 0;
    112     virtual void runMessageLoopOnPause(v8::Handle<v8::Context>) = 0;
    113     virtual void quitMessageLoopOnPause() = 0;
    114 
    115     static void breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>&);
    116     void handleProgramBreak(v8::Handle<v8::Object> executionState, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpoints);
    117     void handleProgramBreak(const v8::Debug::EventDetails&, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpointNumbers);
    118 
    119     static void v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails);
    120     void handleV8DebugEvent(const v8::Debug::EventDetails& eventDetails);
    121 
    122     void dispatchDidParseSource(ScriptDebugListener* listener, v8::Handle<v8::Object> sourceObject);
    123 
    124     void ensureDebuggerScriptCompiled();
    125 
    126     PauseOnExceptionsState m_pauseOnExceptionsState;
    127     ScopedPersistent<v8::Object> m_debuggerScript;
    128     ScopedPersistent<v8::Object> m_executionState;
    129     v8::Handle<v8::Context> m_pausedContext;
    130     bool m_breakpointsActivated;
    131     ScopedPersistent<v8::FunctionTemplate> m_breakProgramCallbackTemplate;
    132     HashMap<String, OwnPtr<ScopedPersistent<v8::Script> > > m_compiledScripts;
    133     v8::Isolate* m_isolate;
    134 
    135 private:
    136     void stepCommandWithFrame(const char* functionName, const ScriptValue& frame);
    137     PassRefPtr<JavaScriptCallFrame> wrapCallFrames(v8::Handle<v8::Object> executionState, int maximumLimit);
    138     bool executeSkipPauseRequest(ScriptDebugListener::SkipPauseRequest, v8::Handle<v8::Object> executionState);
    139 
    140     bool m_runningNestedMessageLoop;
    141 };
    142 
    143 } // namespace WebCore
    144 
    145 
    146 #endif // ScriptDebugServer_h
    147