[PATCH] perf test record+probe_libc_inet_pton: expect [unknown] for ping as well

[Li Zhijian]

On system which has not installed debuginfo of iputils(ping) will fail like:
~/lkp/linux/tools/perf$ sudo ./perf test ping -v
63: probe libc's inet_pton & backtrace it with ping       :
--- start ---
test child forked, pid 4207
ping 4224 [007] 3034121.295510: probe_libc:inet_pton: (7fedfccb2200)
7fedfccb2200 __GI___inet_pton+0x0 (/lib/x86_64-linux-gnu/libc-2.23.so)
7fedfcc7ad5e getaddrinfo+0xee (/lib/x86_64-linux-gnu/libc-2.23.so)
55e3239a9f4d [unknown] (/bin/ping)
FAIL: expected backtrace entry 3
".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" got "55e3239a9f4d [unknown] (/bin/ping)"
test child finished with -1
---- end ----
probe libc's inet_pton & backtrace it with ping: FAILED!

To be compatible with this system, expects [unknown] as well

Fixes: 7903a7086723 ("perf script: Show symbol offsets by default")
CC: Sandipan Das <sandipan@xxxxxxxxxxxxxxxxxx>
CC: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Reported-by: kernel test robot <xiaolong.ye@xxxxxxxxx>
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxxxxx>
---
 tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
index 2630570..ebb6549 100755
--- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
@@ -22,12 +22,12 @@ trace_libc_inet_pton_backtrace() {
 		eventattr='call-graph=dwarf,max-stack=4'
 		expected[2]="gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
 		expected[3]="(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$"
-		expected[4]="main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
+		expected[4]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
 		;;
 	*)
 		eventattr='max-stack=3'
 		expected[2]="getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$"
-		expected[3]=".*\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$"
+		expected[3]=".*(\+0x[[:xdigit:]]|\[unknown\])+[[:space:]]\(.*/bin/ping.*\)$"
 		;;
 	esac
 
-- 
2.7.4