Commit 5cc6c8d4 authored Nov 26, 2019 by Masami Hiramatsu Committed by Shuah Khan Dec 09, 2019

selftests/ftrace: Fix multiple kprobe testcase



Fix multiple kprobe event testcase to work it correctly.
There are 2 bugfixes.
 - Since `wc -l FILE` returns not only line number but also
   FILE filename, following "if" statement always failed.
   Fix this bug by replacing it with 'cat FILE | wc -l'
 - Since "while do-done loop" block with pipeline becomes a
   subshell, $N local variable is not update outside of
   the loop.
   Fix this bug by using actual target number (256) instead
   of $N.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

parent ba1b9c50

tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc

+3 −3

Original line number	Diff line number	Diff line
		@@ -20,9 +20,9 @@ while read i; do
		test $N -eq 256 && break
		done

		L=`wc -l kprobe_events`
		if [ $L -ne $N ]; then
		echo "The number of kprobes events ($L) is not $N"
		L=`cat kprobe_events \| wc -l`
		if [ $L -ne 256 ]; then
		echo "The number of kprobes events ($L) is not 256"
		exit_fail
		fi

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