linux-kernel - [PATCH v2 3/3] perf tests: Fix record+probe_libc_inet

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Date:   Wed, 18 Apr 2018 16:29:00 +0530
From:   Sandipan Das <sandipan@...ux.vnet.ibm.com>
To:     acme@...nel.org, jolsa@...hat.com
Cc:     linux-kernel@...r.kernel.org, naveen.n.rao@...ux.vnet.ibm.com,
        ravi.bangoria@...ux.vnet.ibm.com, sukadev@...ux.vnet.ibm.com,
        maynard@...ibm.com
Subject: [PATCH v2 3/3] perf tests: Fix record+probe_libc_inet_pton.sh for powerpc64

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

Output before applying this 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!

Output after applying this 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@...ux.vnet.ibm.com>
---
 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