Bring back ScriptDebugServer and associated machinery

sky/engine/bindings/core/v8/ScriptDebugServer.h

Index: sky/engine/bindings/core/v8/ScriptDebugServer.h
diff --git a/sky/engine/bindings/core/v8/ScriptDebugServer.h b/sky/engine/bindings/core/v8/ScriptDebugServer.h
new file mode 100644
index 0000000000000000000000000000000000000000..9b02a4b5695b16ac86e5a616e29c9036c1a5abd0
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+++ b/sky/engine/bindings/core/v8/ScriptDebugServer.h
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+/*
+ * Copyright (c) 2010, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ScriptDebugServer_h
+#define ScriptDebugServer_h
+
+#include "bindings/core/v8/ScopedPersistent.h"
+#include "core/InspectorBackendDispatcher.h"
+#include "core/inspector/ScriptBreakpoint.h"
+#include "core/inspector/ScriptCallStack.h"
+#include "core/inspector/ScriptDebugListener.h"
+#include "v8/include/v8-debug.h"
+#include "v8/include/v8.h"
+#include "wtf/HashMap.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/text/StringHash.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class ScriptState;
+class ScriptController;
+class ScriptDebugListener;
+class ScriptSourceCode;
+class ScriptValue;
+class JavaScriptCallFrame;
+
+class ScriptDebugServer {
+    WTF_MAKE_NONCOPYABLE(ScriptDebugServer);
+public:
+    String setBreakpoint(const String& sourceID, const ScriptBreakpoint&, int* actualLineNumber, int* actualColumnNumber, bool interstatementLocation);
+    void removeBreakpoint(const String& breakpointId);
+    void clearBreakpoints();
+    void setBreakpointsActivated(bool activated);
+
+    enum PauseOnExceptionsState {
+        DontPauseOnExceptions,
+        PauseOnAllExceptions,
+        PauseOnUncaughtExceptions
+    };
+    PauseOnExceptionsState pauseOnExceptionsState();
+    void setPauseOnExceptionsState(PauseOnExceptionsState pauseOnExceptionsState);
+
+    void setPauseOnNextStatement(bool pause);
+    bool pausingOnNextStatement();
+    bool canBreakProgram();
+    void breakProgram();
+    void continueProgram();
+    void stepIntoStatement();
+    void stepOverStatement();
+    void stepOutOfFunction();
+
+    bool setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>&, ScriptValue* newCallFrames, RefPtr<JSONObject>* result);
+    ScriptValue currentCallFrames();
+    ScriptValue currentCallFramesForAsyncStack();
+    PassRefPtr<JavaScriptCallFrame> callFrameNoScopes(int index);
+    int frameCount();
+
+    static PassRefPtr<JavaScriptCallFrame> toJavaScriptCallFrameUnsafe(const ScriptValue&);
+
+    class Task {
+    public:
+        virtual ~Task() { }
+        virtual void run() = 0;
+    };
+    static void interruptAndRun(PassOwnPtr<Task>, v8::Isolate*);
+    void runPendingTasks();
+
+    bool isPaused();
+    bool runningNestedMessageLoop() { return m_runningNestedMessageLoop; }
+
+    v8::Local<v8::Value> functionScopes(v8::Handle<v8::Function>);
+    v8::Local<v8::Value> collectionEntries(v8::Handle<v8::Object>&);
+    v8::Local<v8::Value> getInternalProperties(v8::Handle<v8::Object>&);
+    v8::Handle<v8::Value> setFunctionVariableValue(v8::Handle<v8::Value> functionValue, int scopeNumber, const String& variableName, v8::Handle<v8::Value> newValue);
+    v8::Local<v8::Value> callDebuggerMethod(const char* functionName, int argc, v8::Handle<v8::Value> argv[]);
+
+    virtual void compileScript(ScriptState*, const String& expression, const String& sourceURL, String* scriptId, String* exceptionDetailsText, int* lineNumber, int* columnNumber, RefPtr<ScriptCallStack>* stackTrace);
+    virtual void clearCompiledScripts();
+    virtual void runScript(ScriptState*, const String& scriptId, ScriptValue* result, bool* wasThrown, String* exceptionDetailsText, int* lineNumber, int* columnNumber, RefPtr<ScriptCallStack>* stackTrace);
+    virtual void setPreprocessorSource(const String&) { }
+    virtual void preprocessBeforeCompile(const v8::Debug::EventDetails&) { }
+    virtual PassOwnPtr<ScriptSourceCode> preprocess(LocalFrame*, const ScriptSourceCode&);
+    virtual String preprocessEventListener(LocalFrame*, const String& source, const String& url, const String& functionName);
+    virtual void clearPreprocessor() { }
+
+    virtual void muteWarningsAndDeprecations() { }
+    virtual void unmuteWarningsAndDeprecations() { }
+
+protected:
+    explicit ScriptDebugServer(v8::Isolate*);
+    virtual ~ScriptDebugServer();
+
+    virtual ScriptDebugListener* getDebugListenerForContext(v8::Handle<v8::Context>) = 0;
+    virtual void runMessageLoopOnPause(v8::Handle<v8::Context>) = 0;
+    virtual void quitMessageLoopOnPause() = 0;
+
+    static void breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>&);
+    void handleProgramBreak(ScriptState* pausedScriptState, v8::Handle<v8::Object> executionState, v8::Handle<v8::Value> exception, v8::Handle<v8::Array> hitBreakpoints);
+
+    static void v8DebugEventCallback(const v8::Debug::EventDetails& eventDetails);
+    void handleV8DebugEvent(const v8::Debug::EventDetails& eventDetails);
+
+    void dispatchDidParseSource(ScriptDebugListener*, v8::Handle<v8::Object> sourceObject, CompileResult);
+
+    void ensureDebuggerScriptCompiled();
+    void discardDebuggerScript();
+
+    PauseOnExceptionsState m_pauseOnExceptionsState;
+    ScopedPersistent<v8::Object> m_debuggerScript;
+    v8::Local<v8::Object> m_executionState;
+    RefPtr<ScriptState> m_pausedScriptState;
+    bool m_breakpointsActivated;
+    ScopedPersistent<v8::FunctionTemplate> m_breakProgramCallbackTemplate;
+    HashMap<String, OwnPtr<ScopedPersistent<v8::Script> > > m_compiledScripts;
+    v8::Isolate* m_isolate;
+
+private:
+    enum ScopeInfoDetails {
+        AllScopes,
+        FastAsyncScopes,
+        NoScopes // Should be the last option.
+    };
+
+    ScriptValue currentCallFramesInner(ScopeInfoDetails);
+
+    PassRefPtr<JavaScriptCallFrame> wrapCallFrames(int maximumLimit, ScopeInfoDetails);
+
+    void handleV8AsyncTaskEvent(ScriptDebugListener*, ScriptState* pausedScriptState, v8::Handle<v8::Object> executionState, v8::Handle<v8::Object> eventData);
+
+    void handleV8PromiseEvent(ScriptDebugListener*, ScriptState* pausedScriptState, v8::Handle<v8::Object> executionState, v8::Handle<v8::Object> eventData);
+
+    bool m_runningNestedMessageLoop;
+};
+
+} // namespace blink
+
+
+#endif // ScriptDebugServer_h