[inspector] Initial import of v8_inspector.

src/inspector/V8Debugger.h

Index: src/inspector/V8Debugger.h
diff --git a/src/inspector/V8Debugger.h b/src/inspector/V8Debugger.h
new file mode 100644
index 0000000000000000000000000000000000000000..c1a1e39f5f6f4e7fdd69a054b10056b664938c6a
--- /dev/null
+++ b/src/inspector/V8Debugger.h
@@ -0,0 +1,159 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_INSPECTOR_V8DEBUGGER_H_
+#define V8_INSPECTOR_V8DEBUGGER_H_
+
+#include "src/inspector/Allocator.h"
+#include "src/inspector/JavaScriptCallFrame.h"
+#include "src/inspector/V8DebuggerScript.h"
+#include "src/inspector/protocol/Forward.h"
+#include "src/inspector/protocol/Runtime.h"
+#include "src/inspector/public/StringView.h"
+#include "src/inspector/public/V8ContextInfo.h"
+
+#include <v8-debug.h>
+#include <v8.h>
+#include <vector>
+
+namespace v8_inspector {
+
+struct ScriptBreakpoint;
+class V8DebuggerAgentImpl;
+class V8InspectorImpl;
+class V8StackTraceImpl;
+
+using protocol::ErrorString;
+
+class V8Debugger {
+  V8_INSPECTOR_DISALLOW_COPY(V8Debugger);
+
+ public:
+  V8Debugger(v8::Isolate*, V8InspectorImpl*);
+  ~V8Debugger();
+
+  static int contextId(v8::Local<v8::Context>);
+  static int getGroupId(v8::Local<v8::Context>);
+  int markContext(const V8ContextInfo&);
+
+  bool enabled() const;
+
+  String16 setBreakpoint(const String16& sourceID, const ScriptBreakpoint&,
+                         int* actualLineNumber, int* actualColumnNumber);
+  void removeBreakpoint(const String16& breakpointId);
+  void setBreakpointsActivated(bool);
+  bool breakpointsActivated() const { return m_breakpointsActivated; }
+
+  enum PauseOnExceptionsState {
+    DontPauseOnExceptions,
+    PauseOnAllExceptions,
+    PauseOnUncaughtExceptions
+  };
+  PauseOnExceptionsState getPauseOnExceptionsState();
+  void setPauseOnExceptionsState(PauseOnExceptionsState);
+  void setPauseOnNextStatement(bool);
+  bool canBreakProgram();
+  void breakProgram();
+  void continueProgram();
+  void stepIntoStatement();
+  void stepOverStatement();
+  void stepOutOfFunction();
+  void clearStepping();
+
+  bool setScriptSource(const String16& sourceID,
+                       v8::Local<v8::String> newSource, bool dryRun,
+                       ErrorString*,
+                       protocol::Maybe<protocol::Runtime::ExceptionDetails>*,
+                       JavaScriptCallFrames* newCallFrames,
+                       protocol::Maybe<bool>* stackChanged);
+  JavaScriptCallFrames currentCallFrames(int limit = 0);
+
+  // Each script inherits debug data from v8::Context where it has been
+  // compiled.
+  // Only scripts whose debug data matches |contextGroupId| will be reported.
+  // Passing 0 will result in reporting all scripts.
+  void getCompiledScripts(int contextGroupId,
+                          std::vector<std::unique_ptr<V8DebuggerScript>>&);
+  void enable();
+  void disable();
+
+  bool isPaused();
+  v8::Local<v8::Context> pausedContext() { return m_pausedContext; }
+
+  int maxAsyncCallChainDepth() { return m_maxAsyncCallStackDepth; }
+  V8StackTraceImpl* currentAsyncCallChain();
+  void setAsyncCallStackDepth(V8DebuggerAgentImpl*, int);
+  std::unique_ptr<V8StackTraceImpl> createStackTrace(v8::Local<v8::StackTrace>);
+  std::unique_ptr<V8StackTraceImpl> captureStackTrace(bool fullStack);
+
+  v8::MaybeLocal<v8::Array> internalProperties(v8::Local<v8::Context>,
+                                               v8::Local<v8::Value>);
+
+  void asyncTaskScheduled(const StringView& taskName, void* task,
+                          bool recurring);
+  void asyncTaskScheduled(const String16& taskName, void* task, bool recurring);
+  void asyncTaskCanceled(void* task);
+  void asyncTaskStarted(void* task);
+  void asyncTaskFinished(void* task);
+  void allAsyncTasksCanceled();
+
+  void muteScriptParsedEvents();
+  void unmuteScriptParsedEvents();
+
+ private:
+  void compileDebuggerScript();
+  v8::MaybeLocal<v8::Value> callDebuggerMethod(const char* functionName,
+                                               int argc,
+                                               v8::Local<v8::Value> argv[]);
+  v8::Local<v8::Context> debuggerContext() const;
+  void clearBreakpoints();
+
+  static void breakProgramCallback(const v8::FunctionCallbackInfo<v8::Value>&);
+  void handleProgramBreak(v8::Local<v8::Context> pausedContext,
+                          v8::Local<v8::Object> executionState,
+                          v8::Local<v8::Value> exception,
+                          v8::Local<v8::Array> hitBreakpoints,
+                          bool isPromiseRejection = false);
+  static void v8DebugEventCallback(const v8::Debug::EventDetails&);
+  v8::Local<v8::Value> callInternalGetterFunction(v8::Local<v8::Object>,
+                                                  const char* functionName);
+  void handleV8DebugEvent(const v8::Debug::EventDetails&);
+  void handleV8AsyncTaskEvent(v8::Local<v8::Context>,
+                              v8::Local<v8::Object> executionState,
+                              v8::Local<v8::Object> eventData);
+
+  v8::Local<v8::Value> collectionEntries(v8::Local<v8::Context>,
+                                         v8::Local<v8::Object>);
+  v8::Local<v8::Value> generatorObjectLocation(v8::Local<v8::Context>,
+                                               v8::Local<v8::Object>);
+  v8::Local<v8::Value> functionLocation(v8::Local<v8::Context>,
+                                        v8::Local<v8::Function>);
+  v8::MaybeLocal<v8::Value> functionScopes(v8::Local<v8::Context>,
+                                           v8::Local<v8::Function>);
+
+  v8::Isolate* m_isolate;
+  V8InspectorImpl* m_inspector;
+  int m_lastContextId;
+  int m_enableCount;
+  bool m_breakpointsActivated;
+  v8::Global<v8::Object> m_debuggerScript;
+  v8::Global<v8::Context> m_debuggerContext;
+  v8::Local<v8::Object> m_executionState;
+  v8::Local<v8::Context> m_pausedContext;
+  bool m_runningNestedMessageLoop;
+  int m_ignoreScriptParsedEventsCounter;
+
+  using AsyncTaskToStackTrace =
+      protocol::HashMap<void*, std::unique_ptr<V8StackTraceImpl>>;
+  AsyncTaskToStackTrace m_asyncTaskStacks;
+  protocol::HashSet<void*> m_recurringTasks;
+  int m_maxAsyncCallStackDepth;
+  std::vector<void*> m_currentTasks;
+  std::vector<std::unique_ptr<V8StackTraceImpl>> m_currentStacks;
+  protocol::HashMap<V8DebuggerAgentImpl*, int> m_maxAsyncCallStackDepthMap;
+};
+
+}  // namespace v8_inspector
+
+#endif  // V8_INSPECTOR_V8DEBUGGER_H_