[PATCH v2 6/7] selftests/ftrace: Add test cases for entry args at function exit
From: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Date: 2024-02-26 03:58:58
Also in:
linux-doc, linux-kselftest, lkml
Subsystem:
kernel selftest framework, the rest, tracing · Maintainers:
Shuah Khan, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Masami Hiramatsu (Google) <mhiramat@kernel.org> Add kretprobe and function exit probe test cases for checking whether those can access entry arguments at function exit correctly. Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> --- .../ftrace/test.d/dynevent/fprobe_entry_arg.tc | 18 ++++++++++++++++++ .../ftrace/test.d/kprobe/kretprobe_entry_arg.tc | 18 ++++++++++++++++++ 2 files changed, 36 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/fprobe_entry_arg.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_entry_arg.tc
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_entry_arg.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_entry_arg.tc
new file mode 100644
index 000000000000..d183b8a8ecf8
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_entry_arg.tc@@ -0,0 +1,18 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Function return probe entry argument access +# requires: dynamic_events 'f[:[<group>/][<event>]] <func-name>':README 'kernel return probes support:':README + +echo 'f:tests/myevent1 vfs_open arg=$arg1' >> dynamic_events +echo 'f:tests/myevent2 vfs_open%return arg=$arg1' >> dynamic_events + +echo 1 > events/tests/enable + +echo > trace +cat trace > /dev/null + +function streq() { + test $1 = $2 +} + +streq `grep -A 1 -m 1 myevent1 trace | sed -r 's/^.*(arg=.*)/\1/' `
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_entry_arg.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_entry_arg.tc
new file mode 100644
index 000000000000..53b82f36a1d0
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_entry_arg.tc@@ -0,0 +1,18 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Kretprobe entry argument access +# requires: kprobe_events 'kernel return probes support:':README + +echo 'p:myevent1 vfs_open arg=$arg1' >> kprobe_events +echo 'r:myevent2 vfs_open arg=$arg1' >> kprobe_events + +echo 1 > events/kprobes/enable + +echo > trace +cat trace > /dev/null + +function streq() { + test $1 = $2 +} + +streq `grep -A 1 -m 1 myevent1 trace | sed -r 's/^.*(arg=.*)/\1/' `