linux-kernel - [PATCH 1/2] [BUGFIX] selftest: ftrace: Fix to pick text symbols for kprobes

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Message-Id: <151177641912.11564.13469147313642285330.stgit@devbox>
Date:   Mon, 27 Nov 2017 18:53:39 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     linux-kselftest@...r.kernel.org, shuah@...nel.org,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     mhiramat@...nel.org, linux-kernel@...r.kernel.org,
        Alex Shi <alex.shi@...aro.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Jon Medhurst <tixy@...aro.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/2] [BUGFIX] selftest: ftrace: Fix to pick text symbols for kprobes

Fix to pick text symbols for multiple kprobe testcase.
kallsyms shows text symbols with " t " or " T " but
current testcase picks all symbols including "t",
so it picks data symbols if it includes 't' (e.g. "str").

This fixes it to find symbol lines with " t " or " T "
(including spaces).

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
Reported-by: Russell King <linux@...linux.org.uk>
---
 .../ftrace/test.d/kprobe/multiple_kprobes.tc       |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc
index bb16cf91f1b5..e297bd7a2e79 100644
--- a/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc
@@ -12,8 +12,8 @@ case `uname -m` in
   *) OFFS=0;;
 esac
 
-echo "Setup up to 256 kprobes"
-grep t /proc/kallsyms | cut -f3 -d" " | grep -v .*\\..* | \
+echo "Setup up kprobes on first 256 text symbols"
+grep -i " t " /proc/kallsyms | cut -f3 -d" " | grep -v .*\\..* | \
 head -n 256 | while read i; do echo p ${i}+${OFFS} ; done > kprobe_events ||:
 
 echo 1 > events/kprobes/enable