Debugger: make debug code on-stack replacement more robust.

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems 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.
 //
@@ skipping 1599 matching lines @@
   void Print();
 
   // Check the code size generated from label to here.
   int SizeOfCodeGeneratedSince(Label* label) {
     return pc_offset() - label->pos();
   }
 
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();
 
+  // Mark generator continuation.
+  void RecordGeneratorContinuation();
+
   // Mark address of a debug break slot.
   void RecordDebugBreakSlot();
   void RecordDebugBreakSlotForCall(int argc);
   void RecordDebugBreakSlotForConstructCall();
 
   // Record a comment relocation entry that can be used by a disassembler.
   // Use --code-comments to enable.
   void RecordComment(const char* msg);
 
   // Record a deoptimization reason that can be used by a log or cpu profiler.
@@ skipping 531 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_