Fix issue 491: constantpool dump violates ARM debugger assertion for return p...

src/debug.h

 // Copyright 2006-2008 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 359 matching lines @@
 
   // Code generation assumptions.
   static const int kIa32CallInstructionLength = 5;
   static const int kIa32JSReturnSequenceLength = 6;
 
   // The x64 JS return sequence is padded with int3 to make it large
   // enough to hold a call instruction when the debugger patches it.
   static const int kX64CallInstructionLength = 13;
   static const int kX64JSReturnSequenceLength = 13;
 
+  static const int kARMJSReturnSequenceLength = 4;
+
   // Code generator routines.
   static void GenerateLoadICDebugBreak(MacroAssembler* masm);
   static void GenerateStoreICDebugBreak(MacroAssembler* masm);
   static void GenerateKeyedLoadICDebugBreak(MacroAssembler* masm);
   static void GenerateKeyedStoreICDebugBreak(MacroAssembler* masm);
   static void GenerateConstructCallDebugBreak(MacroAssembler* masm);
   static void GenerateReturnDebugBreak(MacroAssembler* masm);
   static void GenerateStubNoRegistersDebugBreak(MacroAssembler* masm);
 
   // Called from stub-cache.cc.
@@ skipping 470 matching lines @@
   Debug::AddressId id_;
   int reg_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 #endif  // V8_DEBUG_H_