LiveEdit: breakpoints updates and fixes for related problems

src/liveedit.h

 // Copyright 2010 the V8 project authors. 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
@@ skipping 49 matching lines @@
 // in any other time this class is very cheap.
 //
 // The primary interest of the Tracker is to record function scope structures
 // in order to analyze whether function code maybe safely patched (with new
 // code successfully reading existing data from function scopes). The Tracker
 // also collects compiled function codes.
 class LiveEditFunctionTracker {
  public:
   explicit LiveEditFunctionTracker(FunctionLiteral* fun);
   ~LiveEditFunctionTracker();
-  void RecordFunctionCode(Handle<Code> code);
-  void RecordFunctionScope(Scope* scope);
+  void RecordFunctionInfo(Handle<SharedFunctionInfo> info,
+                          FunctionLiteral* lit);
+  void RecordRootFunctionInfo(Handle<Code> code);
 
   static bool IsActive();
 };
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 
 class LiveEdit : AllStatic {
  public:
   static JSArray* GatherCompileInfo(Handle<Script> script,
                                     Handle<String> source);
 
   static void WrapSharedFunctionInfos(Handle<JSArray> array);
 
   static void ReplaceFunctionCode(Handle<JSArray> new_compile_info_array,
                                   Handle<JSArray> shared_info_array);
 
-  static void RelinkFunctionToScript(Handle<JSArray> shared_info_array,
-                                     Handle<Script> script_handle);
+  // Updates script field in FunctionSharedInfo.
+  static void SetFunctionScript(Handle<JSValue> function_wrapper,
+                                Handle<Object> script_handle);
 
-  // Returns an array of pairs (new source position, breakpoint_object/array)
-  // so that JS side could update positions in breakpoint objects.
-  static Handle<JSArray> PatchFunctionPositions(
+  static void PatchFunctionPositions(
       Handle<JSArray> shared_info_array, Handle<JSArray> position_change_array);
 
+  // For a script updates its source field. If old_script_name is provided
+  // (i.e. is a String), also creates a copy of the script with its original
+  // source and sends notification to debugger.
+  static Object* ChangeScriptSource(Handle<Script> original_script,
+                                    Handle<String> new_source,
+                                    Handle<Object> old_script_name);
+
+  // In a code of a parent function replaces original function as embedded
+  // object with a substitution one.
+  static void ReplaceRefToNestedFunction(Handle<JSValue> parent_function_shared,
+                                         Handle<JSValue> orig_function_shared,
+                                         Handle<JSValue> subst_function_shared);
+
   // Checks listed functions on stack and return array with corresponding
   // FunctionPatchabilityStatus statuses; extra array element may
   // contain general error message. Modifies the current stack and
   // has restart the lowest found frames and drops all other frames above
   // if possible and if do_drop is true.
   static Handle<JSArray> CheckAndDropActivations(
       Handle<JSArray> shared_info_array, bool do_drop);
 
   // A copy of this is in liveedit-debugger.js.
   enum FunctionPatchabilityStatus {
@@ skipping 42 matching lines @@
   static void CalculateDifference(Input* input,
                                   Output* result_writer);
 };
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 } }  // namespace v8::internal
 
 #endif /* V*_LIVEEDIT_H_ */