Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux

perf test record_probe_libc_inet_pton: Fix test on s/390 where 'text_to_binary_address' now appears on the backtrace

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 inet_pton
84: probe libc's inet_pton & backtrace it with ping : FAILED!
#

Output after:

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

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: https://lore.kernel.org/r/20221228145704.2702487-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

authored by

Thomas Richter and committed by
Arnaldo Carvalho de Melo
fb710dde d8d85ce8

+1
+1
tools/perf/tests/shell/record+probe_libc_inet_pton.sh
··· 37 37 case "$(uname -m)" in 38 38 s390x) 39 39 eventattr='call-graph=dwarf,max-stack=4' 40 + echo "text_to_binary_address.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$" >> $expected 40 41 echo "gaih_inet.*\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$" >> $expected 41 42 echo "(__GI_)?getaddrinfo\+0x[[:xdigit:]]+[[:space:]]\($libc|inlined\)$" >> $expected 42 43 echo "main\+0x[[:xdigit:]]+[[:space:]]\(.*/bin/ping.*\)$" >> $expected