From: Akanksha J N <akanksha@linux.ibm.com>
To: linux-kselftest@vger.kernel.org,
linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: rostedt@goodmis.org, mhiramat@kernel.org, shuah@kernel.org,
naveen.n.rao@linux.ibm.com, akanksha@linux.ibm.com
Subject: [PATCH v3 2/2] selftests/ftrace: Add new test case which checks for optimized probes
Date: Fri, 28 Apr 2023 22:08:42 +0530 [thread overview]
Message-ID: <20230428163842.95118-3-akanksha@linux.ibm.com> (raw)
In-Reply-To: <20230428163842.95118-1-akanksha@linux.ibm.com>
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.
Signed-off-by: Akanksha J N <akanksha@linux.ibm.com>
---
.../ftrace/test.d/kprobe/kprobe_opt_types.tc | 34 +++++++++++++++++++
1 file changed, 34 insertions(+)
create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc
new file mode 100644
index 000000000000..9f5d99328086
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_opt_types.tc
@@ -0,0 +1,34 @@
+#!/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
--
2.31.1
next prev parent reply other threads:[~2023-04-28 16:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-28 16:38 [PATCH v3 0/2] selftests/ftrace: Add tests for kprobes and optimized probes Akanksha J N
2023-04-28 16:38 ` [PATCH v3 1/2] selftests/ftrace: Add new test case which adds multiple consecutive probes in a function Akanksha J N
2023-04-28 16:38 ` Akanksha J N [this message]
2023-04-30 1:52 ` [PATCH v3 2/2] selftests/ftrace: Add new test case which checks for optimized probes Masami Hiramatsu
2023-05-08 17:36 ` Shuah Khan
2023-05-12 22:15 ` Steven Rostedt
2023-05-17 16:26 ` Shuah Khan
2023-05-18 4:29 ` Masami Hiramatsu
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