[WIP] Initial CallFunctionCallback builtin.

src/ia32/code-stubs-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 2652 matching lines @@
   }
   __ LeaveApiExitFrame(!restore_context);
 
   // Check if the function scheduled an exception.
   ExternalReference scheduled_exception_address =
       ExternalReference::scheduled_exception_address(isolate);
   __ cmp(Operand::StaticVariable(scheduled_exception_address),
          Immediate(isolate->factory()->the_hole_value()));
   __ j(not_equal, &promote_scheduled_exception);
 
-#if DEBUG
   // Check if the function returned a valid JavaScript value.
-  Label ok;
-  Register return_value = eax;
-  Register map = ecx;
-
-  __ JumpIfSmi(return_value, &ok, Label::kNear);
-  __ mov(map, FieldOperand(return_value, HeapObject::kMapOffset));
-
-  __ CmpInstanceType(map, LAST_NAME_TYPE);
-  __ j(below_equal, &ok, Label::kNear);
-
-  __ CmpInstanceType(map, FIRST_JS_RECEIVER_TYPE);
-  __ j(above_equal, &ok, Label::kNear);
-
-  __ cmp(map, isolate->factory()->heap_number_map());
-  __ j(equal, &ok, Label::kNear);
-
-  __ cmp(return_value, isolate->factory()->undefined_value());
-  __ j(equal, &ok, Label::kNear);
-
-  __ cmp(return_value, isolate->factory()->true_value());
-  __ j(equal, &ok, Label::kNear);
-
-  __ cmp(return_value, isolate->factory()->false_value());
-  __ j(equal, &ok, Label::kNear);
-
-  __ cmp(return_value, isolate->factory()->null_value());
-  __ j(equal, &ok, Label::kNear);
-
-  __ Abort(kAPICallReturnedInvalidObject);
-
-  __ bind(&ok);
-#endif
+  __ AssertApiCallResult(eax);
 
   if (stack_space_operand != nullptr) {
     DCHECK_EQ(0, stack_space);
     __ pop(ecx);
     __ add(esp, ebx);
     __ jmp(ecx);
   } else {
     __ ret(stack_space * kPointerSize);
   }
 
@@ skipping 76 matching lines @@
   __ mov(scratch, esp);
 
   // push return address
   __ push(return_address);
 
   if (!is_lazy()) {
     // load context from callee
     __ mov(context, FieldOperand(callee, JSFunction::kContextOffset));
   }
 
+  if (!this->is_store()) {
+    __ mov(eax, Immediate(this->argc()));
+    __ Jump(masm->isolate()->builtins()->CallFunctionCallback(),
+            RelocInfo::CODE_TARGET);
+  }
+
   // API function gets reference to the v8::Arguments. If CPU profiler
   // is enabled wrapper function will be called and we need to pass
   // address of the callback as additional parameter, always allocate
   // space for it.
   const int kApiArgc = 1 + 1;
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
   const int kApiStackSpace = 3;
 
@@ skipping 106 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32