[runtime] Fix ES6 9.2.1 [[Call]] when encountering a classConstructor.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 481e100c77361db3b333794d1e82e34e5f19aa32..2e2095f145d0539aa2996a66b02b619197178dda 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -2108,6 +2108,20 @@ void CallICStub::Generate(MacroAssembler* masm) {
     __ bind(&cont);
   }
 
+  {

[Benedikt Meurer, 2015/10/22 11:08:05]

You need to do the same in the CallFunctionStub.

+    Label non_classConstructor;
+    __ movp(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
+    // Check whether the current function is a classConstructor
+    __ testb(FieldOperand(rdx, SharedFunctionInfo::kIsArrowByteOffset),
+             Immediate(FunctionKind::kClassConstructor));
+    __ j(zero, &non_classConstructor);

[Benedikt Meurer, 2015/10/22 11:08:05]

You can use Label::kNear here.

[Camillo Bruni, 2015/11/03 16:05:27]

done

+    // In the case of a classConstructor, let the CallFunction builtin handle
+    // throwing a TypeError.
+    __ Jump(masm->isolate()->builtins()->CallFunction(),
+            RelocInfo::CODE_TARGET);
+    __ bind(&non_classConstructor);
+  }
+
   __ InvokeFunction(rdi, actual, JUMP_FUNCTION, NullCallWrapper());

[Benedikt Meurer, 2015/10/22 11:08:05]

Please check if it's viable to use __Jump(builtin->CallFunction()) here.

 
   __ bind(&slow);