[PATCH] Fix perf test probe libc's inet_pton on x86_64

From: Thomas Richter
Date: Wed May 03 2023 - 04:15:37 EST


The test case probe libc's inet_pton & backtrace it with ping
fails with Fedora 38 on x86_64.

Function getaddrinfo() does not show up in the call chain anymore:
# ./perf script
ping 1803 [000] 728.567146: probe_libc:inet_pton: (7f5275afc840)
133840 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6)
27b4a __libc_start_call_main+0x7a (/usr/lib64/libc.so.6)
27c0b __libc_start_main@@GLIBC_2.34+0x8b (/usr/lib64/libc.so.6)

ping 1803 [000] 728.567184: probe_libc:inet_pton: (7f5275afc840)
133840 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6)
493e main+0xcde (/usr/bin/ping)
27b4a __libc_start_call_main+0x7a (/usr/lib64/libc.so.6)

#
which causes the test case to fail. Remove function getaddrinfo()
from list of expected functions.

Output before:
# ./perf test 'libc'
91: probe libc's inet_pton & backtrace it with ping : FAILED!
#

Output after:
# ./perf test 'libc'
91: probe libc's inet_pton & backtrace it with ping : Ok
#

Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
---
tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 1 -
1 file changed, 1 deletion(-)

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 b4149b2db4c6..8d5915d3ad6f 100755
--- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
@@ -51,7 +51,6 @@ trace_libc_inet_pton_backtrace() {
;;
*)
eventattr='max-stack=3'
- echo "getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc\)$" >> $expected
echo ".*(\+0x[[:xdigit:]]+|\[unknown\])[[:space:]]\(.*/bin/ping.*\)$" >> $expected
;;
esac
--
2.40.1