On Thu, 19 Aug 2021 11:26:08 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx> > > 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://lkml.kernel.org/r/20210819041842.884828019@xxxxxxxxxxx > > Cc: Shuah Khan <shuah@xxxxxxxxxx> > Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> > Cc: linux-kselftest@xxxxxxxxxxxxxxx > Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> > --- > .../test.d/dynevent/add_remove_eprobe.tc | 53 +++++++++++++++++++ > 1 file changed, 53 insertions(+) > create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc > > diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc > new file mode 100644 > index 000000000000..7b242f29b916 > --- /dev/null > +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc > @@ -0,0 +1,53 @@ > +#!/bin/sh > +# SPDX-License-Identifier: GPL-2.0 > +# description: Generic dynamic event - add/remove eprobe events > +# requires: dynamic_events "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/$END/trigger Hmm, can you make this more simple one without synthetic events? Since synthetic event depends on CONFIG_SYNTH_EVENTS, you need to add "synth_events" to 'requires' tag. However, this means that this testcase doesn't run when CONFIG_SYNTH_EVENTS=n but CONFIG_*PROBE_EVENTS=y. Thank you, > + > +echo "e:$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 -- Masami Hiramatsu <mhiramat@xxxxxxxxxx>
