linux-kernel - [PATCH 41/46] perf test record+probe_libc_inet

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Message-Id: <20180605175030.32549-42-acme@kernel.org>
Date:   Tue,  5 Jun 2018 14:50:25 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Clark Williams <williams@...hat.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        David Ahern <dsahern@...il.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Namhyung Kim <namhyung@...nel.org>,
        "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Sandipan Das <sandipan@...ux.vnet.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Wang Nan <wangnan0@...wei.com>
Subject: [PATCH 41/46] perf test record+probe_libc_inet_pton: Ask 'nm' for dynamic symbols

From: Arnaldo Carvalho de Melo <acme@...hat.com>

Adrian reported that this test fails in his system where:

  probe libc's inet_pton & backtrace it with ping: FAILED!
  root@...04:~/git/linux-perf# nm -g /lib/x86_64-linux-gnu/libc-2.19.so | grep inet_pton
  nm: /lib/x86_64-linux-gnu/libc-2.19.so: no symbols

This fails on ubuntu systems, with Adrian's being kubuntu 14.04, I
tested with ubuntu 14.04.4 and 18.04, and there we need to use the
-D/--dynamic 'nm' option to have this test working. And it works as well
with that on fedora 27, so use it.

Reported-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Cc: Sandipan Das <sandipan@...ux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@...ux.ibm.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-zlfnbauad3ljlmtjgo0v660u@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/tests/shell/record+probe_libc_inet_pton.sh | 2 +-
 1 file changed, 1 insertion(+), 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 650b208f700f..263057039693 100755
--- a/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
+++ b/tools/perf/tests/shell/record+probe_libc_inet_pton.sh
@@ -11,7 +11,7 @@
 . $(dirname $0)/lib/probe.sh
 
 libc=$(grep -w libc /proc/self/maps | head -1 | sed -r 's/.*[[:space:]](\/.*)/\1/g')
-nm -g $libc 2>/dev/null | fgrep -q inet_pton || exit 254
+nm -Dg $libc 2>/dev/null | fgrep -q inet_pton || exit 254
 
 trace_libc_inet_pton_backtrace() {
 	idx=0
-- 
2.14.3