Implement set trap for proxies, and revamp class hierarchy in preparation

src/arm/builtins-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 930 matching lines @@
 
   // If the result is a smi, it is *not* an object in the ECMA sense.
   // r0: result
   // sp[0]: receiver (newly allocated object)
   // sp[1]: constructor function
   // sp[2]: number of arguments (smi-tagged)
   __ tst(r0, Operand(kSmiTagMask));
   __ b(eq, &use_receiver);
 
   // If the type of the result (stored in its map) is less than
-  // FIRST_JS_OBJECT_TYPE, it is not an object in the ECMA sense.
-  __ CompareObjectType(r0, r3, r3, FIRST_JS_OBJECT_TYPE);
+  // FIRST_OBJECT_OR_FUNCTION_CLASS_TYPE, it is not an object in the ECMA sense.

[Kevin Millikin (Chromium), 2011/05/26 09:31:08]

Maybe the terminology is still not quite right.  This catches lots of Objects
that don't have [[Class]] "Object" or "Function" (e.g., "Arguments", "Array",
"Number", etc.).

All of those things do have type Object.

[rossberg, 2011/05/31 14:50:24]

Changed according to your suggestion on the list.

+  __ CompareObjectType(r0, r3, r3, FIRST_OBJECT_OR_FUNCTION_CLASS_TYPE);
   __ b(ge, &exit);
 
   // Throw away the result of the constructor invocation and use the
   // on-stack receiver as the result.
   __ bind(&use_receiver);
   __ ldr(r0, MemOperand(sp));
 
   // Remove receiver from the stack, remove caller arguments, and
   // return.
   __ bind(&exit);
@@ skipping 672 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ Jump(r3);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM