add a default value for return value

src/ia32/stub-cache-ia32.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 451 matching lines @@
                                 int argc) {
   // ----------- S t a t e -------------
   //  -- esp[0]              : return address
   //  -- esp[4]              : object passing the type check
   //                           (last fast api call extra argument,
   //                            set by CheckPrototypes)
   //  -- esp[8]              : api function
   //                           (first fast api call extra argument)
   //  -- esp[12]             : api call data
   //  -- esp[16]             : isolate
-  //  -- esp[20]             : ReturnValue
-  //  -- esp[24]             : last argument
+  //  -- esp[20]             : ReturnValue default value
+  //  -- esp[24]             : ReturnValue
+  //  -- esp[28]             : last argument
   //  -- ...
-  //  -- esp[(argc + 5) * 4] : first argument
-  //  -- esp[(argc + 6) * 4] : receiver
+  //  -- esp[(argc + 6) * 4] : first argument
+  //  -- esp[(argc + 7) * 4] : receiver
   // -----------------------------------
   // Get the function and setup the context.
   Handle<JSFunction> function = optimization.constant_function();
   __ LoadHeapObject(edi, function);
   __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
 
   // Pass the additional arguments.
   __ mov(Operand(esp, 2 * kPointerSize), edi);
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
   Handle<Object> call_data(api_call_info->data(), masm->isolate());
   if (masm->isolate()->heap()->InNewSpace(*call_data)) {
     __ mov(ecx, api_call_info);
     __ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kDataOffset));
     __ mov(Operand(esp, 3 * kPointerSize), ebx);
   } else {
     __ mov(Operand(esp, 3 * kPointerSize), Immediate(call_data));
   }
   __ mov(Operand(esp, 4 * kPointerSize),
          Immediate(reinterpret_cast<int>(masm->isolate())));
   __ mov(Operand(esp, 5 * kPointerSize),
          masm->isolate()->factory()->undefined_value());
+  __ mov(Operand(esp, 6 * kPointerSize),
+         masm->isolate()->factory()->undefined_value());
 
   // Prepare arguments.
-  STATIC_ASSERT(kFastApiCallArguments == 5);
+  STATIC_ASSERT(kFastApiCallArguments == 6);
   __ lea(eax, Operand(esp, kFastApiCallArguments * kPointerSize));
 
   const int kApiArgc = 1;  // API function gets reference to the v8::Arguments.
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
   const int kApiStackSpace = 4;
 
   // Function address is a foreign pointer outside V8's heap.
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
@@ skipping 869 matching lines @@
   ASSERT(!scratch2().is(reg));
   __ push(reg);  // holder
   // Push data from ExecutableAccessorInfo.
   if (isolate()->heap()->InNewSpace(callback->data())) {
     __ mov(scratch1(), Immediate(callback));
     __ push(FieldOperand(scratch1(), ExecutableAccessorInfo::kDataOffset));
   } else {
     __ push(Immediate(Handle<Object>(callback->data(), isolate())));
   }
   __ push(Immediate(isolate()->factory()->undefined_value()));  // ReturnValue
+  // ReturnValue default value
+  __ push(Immediate(isolate()->factory()->undefined_value()));
   __ push(Immediate(reinterpret_cast<int>(isolate())));
 
   // Save a pointer to where we pushed the arguments pointer.  This will be
   // passed as the const ExecutableAccessorInfo& to the C++ callback.
   __ push(scratch2());
 
   __ push(name());  // name
   __ mov(ebx, esp);  // esp points to reference to name (handler).
 
   __ push(scratch3());  // Restore return address.
@@ skipping 13 matching lines @@
   __ mov(ApiParameterOperand(1, returns_handle), ebx);  // arguments pointer.
 
   // Emitting a stub call may try to allocate (if the code is not
   // already generated).  Do not allow the assembler to perform a
   // garbage collection but instead return the allocation failure
   // object.
 
   __ CallApiFunctionAndReturn(getter_address,
                               kStackSpace,
                               returns_handle,
-                              5);
+                              6);
 }
 
 
 void BaseLoadStubCompiler::GenerateLoadConstant(Handle<JSFunction> value) {
   // Return the constant value.
   __ LoadHeapObject(eax, value);
   __ ret(0);
 }
 
 
@@ skipping 2304 matching lines @@
     TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32