Fix Kraken segfaults on ARM.

src/arm/lithium-codegen-arm.cc

 // Copyright 2011 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 3345 matching lines @@
     int offset =
         ToInteger32(const_operand) * kPointerSize + FixedArray::kHeaderSize;
     __ str(value, FieldMemOperand(elements, offset));
   } else {
     __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
     __ str(value, FieldMemOperand(scratch, FixedArray::kHeaderSize));
   }
 
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     // Compute address of modified element and store it into key register.
-    __ add(key, scratch, Operand(FixedArray::kHeaderSize));
+    __ add(key, scratch, Operand(FixedArray::kHeaderSize - 1));

[Erik Corry, 2011/10/05 10:48:20]

Instead of 1 how about kHeapObjectTag?

     __ RecordWrite(elements, key, value, kLRHasBeenSaved, kSaveFPRegs);
   }
 }
 
 
 void LCodeGen::DoStoreKeyedFastDoubleElement(
     LStoreKeyedFastDoubleElement* instr) {
   DwVfpRegister value = ToDoubleRegister(instr->value());
   Register elements = ToRegister(instr->elements());
   Register key = no_reg;
@@ skipping 1189 matching lines @@
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 
 
 #undef __
 
 } }  // namespace v8::internal