Implement identity hashes for proxies.

src/runtime.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 667 matching lines @@
   weakmap->set_table(*table);
   weakmap->set_next(Smi::FromInt(0));
   return *weakmap;
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapGet) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 2);
   CONVERT_ARG_CHECKED(JSWeakMap, weakmap, 0);
-  // TODO(mstarzinger): Currently we cannot use JSProxy objects as keys
-  // because they cannot be cast to JSObject to get an identity hash code.
-  CONVERT_ARG_CHECKED(JSObject, key, 1);
+  CONVERT_ARG_CHECKED(JSReceiver, key, 1);
   return weakmap->table()->Lookup(*key);
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapSet) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 3);
   CONVERT_ARG_CHECKED(JSWeakMap, weakmap, 0);
-  // TODO(mstarzinger): See Runtime_WeakMapGet above.
-  CONVERT_ARG_CHECKED(JSObject, key, 1);
+  CONVERT_ARG_CHECKED(JSReceiver, key, 1);
   Handle<Object> value(args[2]);
   Handle<ObjectHashTable> table(weakmap->table());
   Handle<ObjectHashTable> new_table = PutIntoObjectHashTable(table, key, value);
   weakmap->set_table(*new_table);
   return *value;
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_ClassOf) {
   NoHandleAllocation ha;
@@ skipping 12171 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal