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selftests/nolibc: prevent coredumps during test execution

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The child process forked during stackprotector tests intentionally gets
killed with SIGABRT. By default this will trigger writing a coredump.
The writing of the coredump can spam the systems coredump machinery and
take some time.

Timings for the full run of nolibc-test:
Before: 200ms
After:   20ms

This is on a desktop x86 system with systemd-coredumpd enabled.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Thomas Weißschuh 2023-05-26 09:51:20 +02:00 committed by Paul E. McKenney
parent 208aa9d94c
commit 9a75575b81
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/nolibc/nolibc-test.c
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@ -831,6 +831,7 @@ static int run_protection(int min, int max)
close(STDOUT_FILENO);
close(STDERR_FILENO);
prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
smash_stack();
return 1;