diff options
author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
---|---|---|
committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/debug/tst-longjmp_chk.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.xz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/debug/tst-longjmp_chk.c')
-rw-r--r-- | REORG.TODO/debug/tst-longjmp_chk.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/REORG.TODO/debug/tst-longjmp_chk.c b/REORG.TODO/debug/tst-longjmp_chk.c new file mode 100644 index 0000000000..e4e93d2a36 --- /dev/null +++ b/REORG.TODO/debug/tst-longjmp_chk.c @@ -0,0 +1,78 @@ +/* Basic test to make sure doing a longjmp to a jmpbuf with an invalid sp + is caught by the fortification code. */ +#include <errno.h> +#include <fcntl.h> +#include <paths.h> +#include <setjmp.h> +#include <signal.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + + +static int do_test(void); +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" + + +static jmp_buf b; + + +static void +__attribute__ ((noinline)) +f (void) +{ + char buf[1000]; + asm volatile ("" : "=m" (buf)); + + if (setjmp (b) != 0) + { + puts ("second longjmp succeeded"); + exit (1); + } +} + + +static bool expected_to_fail; + + +static void +handler (int sig) +{ + if (expected_to_fail) + _exit (0); + else + { + static const char msg[] = "unexpected longjmp failure\n"; + TEMP_FAILURE_RETRY (write (STDOUT_FILENO, msg, sizeof (msg) - 1)); + _exit (1); + } +} + + +static int +do_test (void) +{ + set_fortify_handler (handler); + + + expected_to_fail = false; + + if (setjmp (b) == 0) + { + longjmp (b, 1); + /* NOTREACHED */ + printf ("first longjmp returned\n"); + return 1; + } + + + expected_to_fail = true; + + f (); + longjmp (b, 1); + + puts ("second longjmp returned"); + return 1; +} |