re PR sanitizer/60569 (Segfault with -flto and -fsanitize=undefined)

	PR sanitizer/60569
	* ubsan.c (ubsan_type_descriptor): Check that DECL_NAME is nonnull
	before accessing it.
testsuite/
	* g++.dg/ubsan/pr60569.C: New test.

From-SVN: r208681

gcc/ChangeLog

+2014-03-19  Marek Polacek  <polacek@redhat.com>
+
+	PR sanitizer/60569
+	* ubsan.c (ubsan_type_descriptor): Check that DECL_NAME is nonnull
+	before accessing it.
+
 2014-03-19  Richard Biener  <rguenther@suse.de>
 
 	PR lto/59543

gcc/testsuite/ChangeLog

+2014-03-19  Marek Polacek  <polacek@redhat.com>
+
+	PR sanitizer/60569
+	* g++.dg/ubsan/pr60569.C: New test.
+
 2014-03-19  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* gcc.dg/tls/pr58595.c: Require tls_runtime instead of tls.

gcc/testsuite/g++.dg/ubsan/pr60569.C

+// PR sanitizer/60569
+// { dg-do link }
+// { dg-require-effective-target lto }
+// { dg-options "-fsanitize=undefined -flto" }
+
+struct A
+{
+  void foo ();
+  struct
+  {
+    int i;
+    void bar () { i = 0; }
+  } s;
+};
+
+void A::foo () { s.bar (); }
+
+int
+main ()
+{
+}

gcc/ubsan.c

@@ -318,7 +318,7 @@ ubsan_type_descriptor (tree type, bool want_pointer_type_p)
     {
       if (TREE_CODE (TYPE_NAME (type2)) == IDENTIFIER_NODE)
 	tname = IDENTIFIER_POINTER (TYPE_NAME (type2));
-      else
+      else if (DECL_NAME (TYPE_NAME (type2)) != NULL)
 	tname = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type2)));
     }