Merged r12440, r12441, r12445, r12446, r12443 into 3.12 branch.

src/x64/macro-assembler-x64.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 733 matching lines @@
   movq(Operand(base_reg, kNextOffset), prev_next_address_reg);
   cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset));
   j(not_equal, &delete_allocated_handles);
   bind(&leave_exit_frame);
 
   // Check if the function scheduled an exception.
   movq(rsi, scheduled_exception_address);
   Cmp(Operand(rsi, 0), factory->the_hole_value());
   j(not_equal, &promote_scheduled_exception);
 
+#if ENABLE_EXTRA_CHECKS
+  // Check if the function returned a valid JavaScript value.
+  Label ok;
+  Register return_value = rax;
+  Register map = rcx;
+
+  JumpIfSmi(return_value, &ok, Label::kNear);
+  movq(map, FieldOperand(return_value, HeapObject::kMapOffset));
+
+  CmpInstanceType(map, FIRST_NONSTRING_TYPE);
+  j(below, &ok, Label::kNear);
+
+  CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE);
+  j(above_equal, &ok, Label::kNear);
+
+  CompareRoot(map, Heap::kHeapNumberMapRootIndex);
+  j(equal, &ok, Label::kNear);
+
+  CompareRoot(return_value, Heap::kUndefinedValueRootIndex);
+  j(equal, &ok, Label::kNear);
+
+  CompareRoot(return_value, Heap::kTrueValueRootIndex);
+  j(equal, &ok, Label::kNear);
+
+  CompareRoot(return_value, Heap::kFalseValueRootIndex);
+  j(equal, &ok, Label::kNear);
+
+  CompareRoot(return_value, Heap::kNullValueRootIndex);
+  j(equal, &ok, Label::kNear);
+
+  Abort("API call returned invalid object");
+
+  bind(&ok);
+#endif
+
   LeaveApiExitFrame();
   ret(stack_space * kPointerSize);
 
   bind(&empty_result);
   // It was zero; the result is undefined.
   LoadRoot(rax, Heap::kUndefinedValueRootIndex);
   jmp(&prologue);
 
   bind(&promote_scheduled_exception);
   TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1);
@@ skipping 3732 matching lines @@
   bind(&check_prototype);
   movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset));
   cmpq(rcx, null_value);
   j(not_equal, &next);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64