obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 38 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/builtin-strncat-chk-1.c b/gcc/testsuite/gcc.dg/builtin-strncat-chk-1.c
new file mode 100644
index 000000000..80d7b9d6e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/builtin-strncat-chk-1.c
@@ -0,0 +1,38 @@
+/* Test whether buffer overflow warnings for __strncat_chk builtin
+   are emitted properly.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -std=gnu99" } */
+
+extern void abort (void);
+
+#include "../gcc.c-torture/execute/builtins/chk.h"
+
+char buf1[20];
+char *q;
+
+void
+test (int arg, ...)
+{
+  char *p = &buf1[10];
+
+  *p = 0;
+  strncat (p, "abcdefg", 9);
+  *p = 0;
+  strncat (p, "abcdefghi", 9);
+  *p = 0;
+  strncat (p, "abcdefghij", 9);
+  *p = 0;
+  strncat (p, "abcdefghi", 10);
+  *p = 0;
+  strncat (p, "abcdefghij", 10); /* { dg-warning "will always overflow" } */
+  *p = 0;
+  strncat (p, "abcdefgh", 11);
+  *p = 0;
+  strncat (p, "abcdefghijkl", 11); /* { dg-warning "will always overflow" } */
+  *p = 0;
+  strncat (p, q, 9);
+  *p = 0;
+  strncat (p, q, 10); /* { dg-warning "might overflow" } */
+  *p = 0;
+  strncat (p, q, 11); /* { dg-warning "might overflow" } */
+}