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Subject[PATCH v2 1/2] perf/test: Fix perf test 84 on s390
Date
perf test '84: probe libc's inet_pton & backtrace it with ping'
fails on s390. Debugging revealed a changed stack trace for the
ping command using probes:

ping 35729 [002] 8006.365063: probe_libc:inet_pton: (3ff9603e7c0)
13e7c0 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6)
---> 104371 text_to_binary_address+0xef1 (inlined)
104371 gaih_inet+0xef1 (inlined)
104371 __GI_getaddrinfo+0xef1 (inlined)
5d4b main+0x139b (/usr/bin/ping)

The line ---> text_to_binary_address ...
is new. It was introduced with glibc version 2.36.7.2 released
with Fedora 37 for s390.

Output before
# ./perf test 84
84: probe libc's inet_pton & backtrace it with ping : FAILED!
#

Output after:
# ./perf test 84
84: probe libc's inet_pton & backtrace it with ping : Ok
#

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

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 34c400ccbe04..4e9de55d871a 100755
--- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
@@ -37,6 +37,7 @@ trace_libc_inet_pton_backtrace() {
case "$(uname -m)" in
s390x)
eventattr='call-graph=dwarf,max-stack=4'
+ echo "text_to_binary_address.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$" >> $expected
echo "gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$" >> $expected
echo "(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$" >> $expected
echo "main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" >> $expected
--
2.38.1
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