Fix handling of function proxies in higher-order array and string methods,

src/runtime.cc

 // Copyright 2012 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 1851 matching lines @@
   InstallBuiltin(isolate, holder, "unshift", Builtins::kArrayUnshift);
   InstallBuiltin(isolate, holder, "slice", Builtins::kArraySlice);
   InstallBuiltin(isolate, holder, "splice", Builtins::kArraySplice);
   InstallBuiltin(isolate, holder, "concat", Builtins::kArrayConcat);
 
   return *holder;
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetDefaultReceiver) {
-  NoHandleAllocation handle_free;
   ASSERT(args.length() == 1);
-  CONVERT_CHECKED(JSFunction, function, args[0]);
+  CONVERT_CHECKED(JSReceiver, callable, args[0]);
+
+  if (!callable->IsJSFunction()) {
+    HandleScope scope(isolate);
+    bool threw = false;
+    Handle<Object> delegate =
+        Execution::TryGetFunctionDelegate(Handle<JSReceiver>(callable), &threw);
+    if (threw) return Failure::Exception();
+    callable = JSFunction::cast(*delegate);
+  }
+  JSFunction* function = JSFunction::cast(callable);
+
   SharedFunctionInfo* shared = function->shared();
   if (shared->native() || !shared->is_classic_mode()) {
     return isolate->heap()->undefined_value();
   }
   // Returns undefined for strict or native functions, or
   // the associated global receiver for "normal" functions.
 
   Context* global_context =
       function->context()->global()->global_context();
   return global_context->global()->global_receiver();
@@ skipping 11740 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(Heap::kNoGCFlags);
   }
 }
 
 
 } }  // namespace v8::internal