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| author | Mike Frysinger <vapier@gentoo.org> | 2013-12-29 16:30:35 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2014-03-13 17:05:29 -0400 |
| commit | 5896c8bdd9f73cdc816a96e107ca1f7a6bc6921e (patch) | |
| tree | 5ae713ed9de3470312dfd100e66cd7b7e179cd33 /debug/tst-longjmp_chk2.c | |
| parent | 2d63a517e4084ec80403cd9f278690fa8b676cc4 (diff) | |
| download | glibc-5896c8bdd9f73cdc816a96e107ca1f7a6bc6921e.tar.gz glibc-5896c8bdd9f73cdc816a96e107ca1f7a6bc6921e.tar.xz glibc-5896c8bdd9f73cdc816a96e107ca1f7a6bc6921e.zip | |
tst-longjmp_chk2: add comments/sanity check
If the longjmp checking code is slightly broken, this code can loop forever which isn't too helpful. Add a sanity check to keep that from happening. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'debug/tst-longjmp_chk2.c')
| -rw-r--r-- | debug/tst-longjmp_chk2.c | 7 |
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. */ |