[PATCH v9 5/6] selftests/ftrace: Add selftest for testing eprobe events on synthetic events
From: "Steven Rostedt (VMware)" rostedt@goodmis.org
Add a test to test event probes, by creating a synthetic event across sys_enter_openat and sys_exit_openat that passes the filename pointer from the enter of the system call to the exit, and then add an event probe to the synthetic event to make sure that the file name is seen.
Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org...
Cc: Shuah Khan shuah@kernel.org Cc: Shuah Khan skhan@linuxfoundation.org Cc: linux-kselftest@vger.kernel.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org --- .../inter-event/trigger-synthetic-eprobe.tc | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc new file mode 100644 index 000000000000..914fe2e5d030 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc @@ -0,0 +1,53 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: event trigger - test inter-event histogram trigger eprobe on synthetic event +# requires: dynamic_events synthetic_events events/syscalls/sys_enter_openat/hist "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README + +echo 0 > events/enable + +clear_dynamic_events + +SYSTEM="syscalls" +START="sys_enter_openat" +END="sys_exit_openat" +FIELD="filename" +SYNTH="synth_open" +EPROBE="eprobe_open" + +echo "$SYNTH u64 filename; s64 ret;" > synthetic_events +echo "hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger +echo "hist:keys=common_pid:filename=$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,$filename,$ret)" > events/$SYSTEM/$END/trigger + +echo "e:$EPROBE synthetic/$SYNTH file=+0($filename):ustring ret=$ret:s64" >> dynamic_events + +grep -q "$SYNTH" dynamic_events +grep -q "$EPROBE" dynamic_events +test -d events/synthetic/$SYNTH +test -d events/eprobes/$EPROBE + +echo 1 > events/eprobes/$EPROBE/enable +ls +echo 0 > events/eprobes/$EPROBE/enable + +content=`grep '^ *ls-' trace | grep 'file='` +nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true + +if [ -z "$content" ]; then + exit_fail +fi + +if [ ! -z "$nocontent" ]; then + exit_fail +fi + +echo "-:$EPROBE" >> dynamic_events +echo '!'"hist:keys=common_pid:filename=$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,$filename,$ret)" > events/$SYSTEM/$END/trigger +echo '!'"hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger +echo '!'"$SYNTH u64 filename; s64 ret;" >> synthetic_events + +! grep -q "$SYNTH" dynamic_events +! grep -q "$EPROBE" dynamic_events +! test -d events/synthetic/$SYNTH +! test -d events/eprobes/$EPROBE + +clear_trace
On Fri, 20 Aug 2021 16:46:49 -0400 Steven Rostedt rostedt@goodmis.org wrote:
From: "Steven Rostedt (VMware)" rostedt@goodmis.org
Add a test to test event probes, by creating a synthetic event across sys_enter_openat and sys_exit_openat that passes the filename pointer from the enter of the system call to the exit, and then add an event probe to the synthetic event to make sure that the file name is seen.
Link: https://lore.kernel.org/linux-kselftest/20210819152825.526931866@goodmis.org...
Cc: Shuah Khan shuah@kernel.org Cc: Shuah Khan skhan@linuxfoundation.org Cc: linux-kselftest@vger.kernel.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org
This looks good to me.
Acked-by: Masami Hiramatsu mhiramat@kernel.org
Thank you!
.../inter-event/trigger-synthetic-eprobe.tc | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc
diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc new file mode 100644 index 000000000000..914fe2e5d030 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc @@ -0,0 +1,53 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: event trigger - test inter-event histogram trigger eprobe on synthetic event +# requires: dynamic_events synthetic_events events/syscalls/sys_enter_openat/hist "e[:[<group>/]<event>] <attached-group>.<attached-event> [<args>]":README
+echo 0 > events/enable
+clear_dynamic_events
+SYSTEM="syscalls" +START="sys_enter_openat" +END="sys_exit_openat" +FIELD="filename" +SYNTH="synth_open" +EPROBE="eprobe_open"
+echo "$SYNTH u64 filename; s64 ret;" > synthetic_events +echo "hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger +echo "hist:keys=common_pid:filename=$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,$filename,$ret)" > events/$SYSTEM/$END/trigger
+echo "e:$EPROBE synthetic/$SYNTH file=+0($filename):ustring ret=$ret:s64" >> dynamic_events
+grep -q "$SYNTH" dynamic_events +grep -q "$EPROBE" dynamic_events +test -d events/synthetic/$SYNTH +test -d events/eprobes/$EPROBE
+echo 1 > events/eprobes/$EPROBE/enable +ls +echo 0 > events/eprobes/$EPROBE/enable
+content=`grep '^ *ls-' trace | grep 'file='` +nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."'` || true
+if [ -z "$content" ]; then
- exit_fail
+fi
+if [ ! -z "$nocontent" ]; then
- exit_fail
+fi
+echo "-:$EPROBE" >> dynamic_events +echo '!'"hist:keys=common_pid:filename=$__arg__1,ret=ret:onmatch($SYSTEM.$START).trace($SYNTH,$filename,$ret)" > events/$SYSTEM/$END/trigger +echo '!'"hist:keys=common_pid:__arg__1=$FIELD" > events/$SYSTEM/$START/trigger +echo '!'"$SYNTH u64 filename; s64 ret;" >> synthetic_events
+! grep -q "$SYNTH" dynamic_events +! grep -q "$EPROBE" dynamic_events +! test -d events/synthetic/$SYNTH +! test -d events/eprobes/$EPROBE
+clear_trace
2.30.2
linux-kselftest-mirror@lists.linaro.org
-
Masami Hiramatsu -
Steven Rostedt