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-rw-r--r--debug/tst-longjmp_chk2.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/debug/tst-longjmp_chk2.c b/debug/tst-longjmp_chk2.c
index 22d8bf0941..dae9ca01e5 100644
--- a/debug/tst-longjmp_chk2.c
+++ b/debug/tst-longjmp_chk2.c
@@ -1,4 +1,6 @@
-/* Test case mostly written by Paolo Bonzini <pbonzini@redhat.com>. */
+/* Verify longjmp fortify checking does not reject signal stacks.
+
+ Test case mostly written by Paolo Bonzini <pbonzini@redhat.com>. */
#include <assert.h>
#include <setjmp.h>
#include <signal.h>
@@ -18,7 +20,10 @@ static void
stackoverflow_handler (int sig)
{
stack_t altstack;
+ /* Sanity check to keep test from looping forever (in case the longjmp
+ chk code is slightly broken). */
pass++;
+ assert (pass < 5);
sigaltstack (NULL, &altstack);
/* Using printf is not really kosher in signal handlers but we know
it will work. */