Refactor after break target computation.

src/liveedit.h

 // Copyright 2012 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_LIVEEDIT_H_
 #define V8_LIVEEDIT_H_
 
 
 
 // Live Edit feature implementation.
@@ skipping 40 matching lines @@
 
   static bool IsActive(Isolate* isolate);
 
  private:
   Isolate* isolate_;
 };
 
 
 class LiveEdit : AllStatic {
  public:
+  // Describes how exactly a frame has been dropped from stack.
+  enum FrameDropMode {
+    // No frame has been dropped.
+    FRAMES_UNTOUCHED,
+    // The top JS frame had been calling IC stub. IC stub mustn't be called now.
+    FRAME_DROPPED_IN_IC_CALL,
+    // The top JS frame had been calling debug break slot stub. Patch the
+    // address this stub jumps to in the end.
+    FRAME_DROPPED_IN_DEBUG_SLOT_CALL,
+    // The top JS frame had been calling some C++ function. The return address
+    // gets patched automatically.
+    FRAME_DROPPED_IN_DIRECT_CALL,
+    FRAME_DROPPED_IN_RETURN_CALL,
+    CURRENTLY_SET_MODE
+  };
+
+  static Address AfterBreakTarget(FrameDropMode mode, Isolate* isolate);
+
   MUST_USE_RESULT static MaybeHandle<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 FunctionSourceUpdated(Handle<JSArray> shared_info_array);
@@ skipping 84 matching lines @@
    */
   // A size of frame base including fp. Padding words starts right above
   // the base.
   static const int kFrameDropperFrameSize = 4;
   // A number of words that should be reserved on stack for the LiveEdit use.
   // Stored on stack in form of Smi.
   static const int kFramePaddingInitialSize = 1;
   // A value that padding words are filled with (in form of Smi). Going
   // bottom-top, the first word not having this value is a counter word.
   static const int kFramePaddingValue = kFramePaddingInitialSize + 1;
-
-
-  // Describes how exactly a frame has been dropped from stack.
-  enum FrameDropMode {
-    // No frame has been dropped.
-    FRAMES_UNTOUCHED,
-    // The top JS frame had been calling IC stub. IC stub mustn't be called now.
-    FRAME_DROPPED_IN_IC_CALL,
-    // The top JS frame had been calling debug break slot stub. Patch the
-    // address this stub jumps to in the end.
-    FRAME_DROPPED_IN_DEBUG_SLOT_CALL,
-    // The top JS frame had been calling some C++ function. The return address
-    // gets patched automatically.
-    FRAME_DROPPED_IN_DIRECT_CALL,
-    FRAME_DROPPED_IN_RETURN_CALL,
-    CURRENTLY_SET_MODE
-  };
 };
 
 
 // A general-purpose comparator between 2 arrays.
 class Comparator {
  public:
   // Holds 2 arrays of some elements allowing to compare any pair of
   // element from the first array and element from the second array.
   class Input {
    public:
@@ skipping 176 matching lines @@
   static const int kEndPositionOffset_ = 2;
   static const int kSharedInfoOffset_ = 3;
   static const int kSize_ = 4;
 
   friend class JSArrayBasedStruct<SharedInfoWrapper>;
 };
 
 } }  // namespace v8::internal
 
 #endif /* V*_LIVEEDIT_H_ */