ivars.c: Add a check for classes without instance variables...

2015-01-09  Dimitris Papavasiliou  <dpapavas@gmail.com>

	* ivars.c: Add a check for classes without instance
	variables, which have a NULL ivar list pointer.

2015-01-09  Dimitris Papavasiliou  <dpapavas@gmail.com>

	* objc.dg/gnu-api-2-class.m: Add a test case
	for the above change.

From-SVN: r219396

gcc/testsuite/ChangeLog

+2015-01-09  Dimitris Papavasiliou  <dpapavas@gmail.com>
+
+	* objc.dg/gnu-api-2-class.m: Add a test case
+	for the above change.
+
 2015-01-09  Sebastian Huber  <sebastian.huber@embedded-brains.de>
 
 	* gcc.dg/typeof-2.c: Add checks for non-atomic types.

gcc/testsuite/objc.dg/gnu-api-2-class.m

@@ -239,6 +239,19 @@ int main(int argc, void **args)
       abort ();
   }
 
+  printf ("Testing class_copyIvarList () on class with no instance variables...\n");
+  {
+    unsigned int count;
+    Ivar * list = class_copyIvarList (objc_getClass ("MyOtherSubClass"),
+                                      &count);
+
+    if (count != 0)
+      abort ();
+    
+    if (list != NULL)
+      abort ();
+  }
+
   printf ("Testing class_copyMethodList ()...\n");
   {
     unsigned int count;

libobjc/ChangeLog

+2015-01-09  Dimitris Papavasiliou  <dpapavas@gmail.com>
+
+	* ivars.c: Add a check for classes without instance
+	variables, which have a NULL ivar list pointer.
+
 2015-01-05  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

libobjc/ivars.c

@@ -179,7 +179,7 @@ struct objc_ivar ** class_copyIvarList (Class class_, unsigned int *numberOfRetu
   struct objc_ivar **returnValue = NULL;
   struct objc_ivar_list* ivar_list;
 
-  if (class_ == Nil  ||  CLS_IS_IN_CONSTRUCTION (class_))
+  if (class_ == Nil  ||  CLS_IS_IN_CONSTRUCTION (class_) || !class_->ivars)
     {
       if (numberOfReturnedIvars)
 	*numberOfReturnedIvars = 0;