Implement function proxies (except for their use as constructors).

src/ia32/code-stubs-ia32.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 4164 matching lines @@
   __ j(not_equal, label);
 }
 
 
 void StackCheckStub::Generate(MacroAssembler* masm) {
   __ TailCallRuntime(Runtime::kStackGuard, 0, 1);
 }
 
 
 void CallFunctionStub::Generate(MacroAssembler* masm) {
-  Label slow;
+  Label slow, non_function;
 
   // The receiver might implicitly be the global object. This is
   // indicated by passing the hole as the receiver to the call
   // function stub.
   if (ReceiverMightBeImplicit()) {
     Label call;
     // Get the receiver from the stack.
     // +1 ~ return address
     __ mov(eax, Operand(esp, (argc_ + 1) * kPointerSize));
     // Call as function is indicated with the hole.
     __ cmp(eax, masm->isolate()->factory()->the_hole_value());
     __ j(not_equal, &call, Label::kNear);
     // Patch the receiver on the stack with the global receiver object.
     __ mov(ebx, GlobalObjectOperand());
     __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
     __ mov(Operand(esp, (argc_ + 1) * kPointerSize), ebx);
     __ bind(&call);
   }
 
   // Get the function to call from the stack.
   // +2 ~ receiver, return address
   __ mov(edi, Operand(esp, (argc_ + 2) * kPointerSize));
 
   // Check that the function really is a JavaScript function.
-  __ JumpIfSmi(edi, &slow);
+  __ JumpIfSmi(edi, &non_function);
   // Goto slow case if we do not have a function.
   __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
   __ j(not_equal, &slow);
 
   // Fast-case: Just invoke the function.
   ParameterCount actual(argc_);
 
   if (ReceiverMightBeImplicit()) {
     Label call_as_function;
     __ cmp(eax, masm->isolate()->factory()->the_hole_value());
     __ j(equal, &call_as_function);
     __ InvokeFunction(edi,
                       actual,
                       JUMP_FUNCTION,
                       NullCallWrapper(),
                       CALL_AS_METHOD);
     __ bind(&call_as_function);
   }
   __ InvokeFunction(edi,
                     actual,
                     JUMP_FUNCTION,
                     NullCallWrapper(),
                     CALL_AS_FUNCTION);
 
   // Slow-case: Non-function called.
   __ bind(&slow);
+  // Check for function proxy.
+  __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE);
+  __ j(not_equal, &non_function);
+  __ pop(ecx);
+  __ push(edi);  // put proxy as additional argument under return address
+  __ push(ecx);
+  __ Set(eax, Immediate(argc_ + 1));
+  __ Set(ebx, Immediate(0));
+  __ SetCallKind(ecx, CALL_AS_FUNCTION);
+  __ GetBuiltinEntry(edx, Builtins::CALL_FUNCTION_PROXY);
+  {
+    Handle<Code> adaptor =
+      masm->isolate()->builtins()->ArgumentsAdaptorTrampoline();
+    __ jmp(adaptor, RelocInfo::CODE_TARGET);
+  }
+
   // CALL_NON_FUNCTION expects the non-function callee as receiver (instead
   // of the original receiver from the call site).
+  __ bind(&non_function);
   __ mov(Operand(esp, (argc_ + 1) * kPointerSize), edi);
   __ Set(eax, Immediate(argc_));
   __ Set(ebx, Immediate(0));
+  __ SetCallKind(ecx, CALL_AS_METHOD);
   __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION);
   Handle<Code> adaptor =
       masm->isolate()->builtins()->ArgumentsAdaptorTrampoline();
-  __ SetCallKind(ecx, CALL_AS_METHOD);
   __ jmp(adaptor, RelocInfo::CODE_TARGET);
 }
 
 
 bool CEntryStub::NeedsImmovableCode() {
   return false;
 }
 
 
 void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) {
@@ skipping 2121 matching lines @@
   __ Drop(1);
   __ ret(2 * kPointerSize);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32