More precise break points and stepping when debugging...

src/arm/codegen-arm.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 208 matching lines @@
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
 #endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
                               FunctionLiteral* lit,
                               bool is_toplevel,
                               Handle<Script> script);
 
-  static void RecordPositions(MacroAssembler* masm, int pos);
+  static bool RecordPositions(MacroAssembler* masm,
+                              int pos,
+                              bool right_here = false);
 
   // Accessors
   MacroAssembler* masm() { return masm_; }
   VirtualFrame* frame() const { return frame_; }
   inline Handle<Script> script();
 
   bool has_valid_frame() const { return frame_ != NULL; }
 
   // Set the virtual frame to be new_frame, with non-frame register
   // reference counts given by non_frame_registers.  The non-frame
@@ skipping 721 matching lines @@
     return ObjectBits::encode(object_.code()) |
            OffsetBits::encode(offset_.code()) |
            ScratchBits::encode(scratch_.code());
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_