[LTP] [PATCH] syscalls/waitid10: Fix on ARM, PPC and possibly others

[Cyril Hrubis]

While integer division by zero does trap on x86_64 and causes the SIGFPE
signal to be delivered it's not the case on all architecutes. At least
on ARM and PPC64LE division by zero simply returns undefined result
instead.

This patch adds raise(SIGFPE) at the end of the child as a fallback to
make sure the process is killed with the right signal on all
architectures.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 testcases/kernel/syscalls/waitid/waitid10.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/waitid/waitid10.c b/testcases/kernel/syscalls/waitid/waitid10.c
index 869ef18bd..8c351d120 100644
--- a/testcases/kernel/syscalls/waitid/waitid10.c
+++ b/testcases/kernel/syscalls/waitid/waitid10.c
@@ -28,7 +28,10 @@ static void run(void)
 		volatile int a, zero = 0;
 
 		a = 1 / zero;
-		exit(a);
+
+		tst_res(TINFO, "Division by zero didn't trap, raising SIGFPE");
+
+		raise(SIGFPE);
 	}
 
 	TST_EXP_PASS(waitid(P_ALL, 0, infop, WEXITED));
-- 
2.34.1