Commit 5985329c authored by Akanksha J N's avatar Akanksha J N Committed by Masami Hiramatsu (Google)
Browse files

selftests/ftrace: Add new test case which checks for optimized probes 

Add new test case kprobe_opt_types.tc which enables and checks
if each probe has been optimized in order to test potential issues with
optimized probes.
The '|| continue' is added with the echo statement to ignore errors that
are caused by trying to add kprobes to non probeable lines and continue
with the test.

Link: Link: https://lore.kernel.org/linux-trace-kernel/20230428163842.95118-3-akanksha@linux.ibm.com



Signed-off-by: default avatarAkanksha J N <akanksha@linux.ibm.com>
Acked-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: default avatarShuah Khan <skhan@linuxfoundation.org>
Acked-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
parent cf9071dd

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

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+34 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0-or-later

# Copyright (C) 2023 Akanksha J N, IBM corporation

# description: Register/unregister optimized probe

# requires: kprobe_events



case `uname -m` in

x86_64)

;;

arm*)

;;

ppc*)

;;

*)

  echo "Please implement other architecture here"

  exit_unsupported

esac



DEFAULT=$(cat /proc/sys/debug/kprobes-optimization)

echo 1 > /proc/sys/debug/kprobes-optimization

for i in `seq 0 255`; do

        echo  "p:testprobe $FUNCTION_FORK+${i}" > kprobe_events || continue

        echo 1 > events/kprobes/enable || continue

        (echo "forked")

	PROBE=$(grep $FUNCTION_FORK /sys/kernel/debug/kprobes/list)

        echo 0 > events/kprobes/enable

        echo > kprobe_events

	if echo $PROBE | grep -q OPTIMIZED; then

                echo "$DEFAULT" >  /proc/sys/debug/kprobes-optimization

                exit_pass

        fi

done

echo "$DEFAULT" >  /proc/sys/debug/kprobes-optimization

exit_unresolved