[PATCH 2/2] perf tests: Fix record+probe_libc_inet_pton.sh for powerpc64

From: Sandipan Das
Date: Thu Apr 12 2018 - 13:12:01 EST


For powerpc64, this test currently fails due to a mismatch in
the expected output.

Before applying patch:

62: probe libc's inet_pton & backtrace it with ping :
--- start ---
test child forked, pid 27723
ping 27740 [012] 607801.690493: probe_libc:inet_pton: (7fff936caf28)
15af28 __GI___inet_pton (/usr/lib64/libc-2.26.so)
10fa54 gaih_inet.constprop.7 (/usr/lib64/libc-2.26.so)
FAIL: expected backtrace entry 2 "getaddrinfo[[:space:]]\(/usr/lib64/libc-2.26.so\)$" got "10fa54 gaih_inet.constprop.7 (/usr/lib64/libc-2.26.so)"
test child finished with -1
---- end ----
probe libc's inet_pton & backtrace it with ping: FAILED!

After applying patch:

62: probe libc's inet_pton & backtrace it with ping :
--- start ---
test child forked, pid 28782
ping 28799 [017] 608933.853323: probe_libc:inet_pton: (7fff891baf28)
15af28 __GI___inet_pton (/usr/lib64/libc-2.26.so)
10fa54 gaih_inet.constprop.7 (/usr/lib64/libc-2.26.so)
1105b4 getaddrinfo (/usr/lib64/libc-2.26.so)
2d70 _init (/usr/bin/ping)
test child finished with 0
---- end ----
probe libc's inet_pton & backtrace it with ping: Ok

Fixes: e07d585e2454 ("perf tests: Switch trace+probe_libc_inet_pton to use record")
Signed-off-by: Sandipan Das <sandipan@xxxxxxxxxxxxxxxxxx>
---
tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 8 ++++++++
1 file changed, 8 insertions(+)

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 1ecc1f0ff84a..b45afc59edc6 100755
--- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
@@ -26,6 +26,14 @@ trace_libc_inet_pton_backtrace() {
expected[5]="__libc_start_main[[:space:]]\($libc\)$"
expected[6]="_start[[:space:]]\(.*/bin/ping.*\)$"
;;
+ ppc64)
+ ;&
+ ppc64le)
+ eventattr='max-stack=4'
+ expected[2]="gaih_inet.*[[:space:]]\($libc\)$"
+ expected[3]="getaddrinfo[[:space:]]\($libc\)$"
+ expected[4]=".*\(.*/bin/ping.*\)$"
+ ;;
*)
eventattr='max-stack=3'
expected[2]="getaddrinfo[[:space:]]\($libc\)$"
--
2.14.3