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selftests/ftrace: Add test that tests event :mod: commands
Now that here's a :mod: command that can be sent into set_event, add a
test that tests its use. Both setting events for a loaded module, as well
as caching what events to set for a module that is not loaded yet.
Cc: Shuah Khan <shuah@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kselftest@vger.kernel.org
Link: https://lore.kernel.org/20250116143533.819228058@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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tools/testing/selftests/ftrace/test.d/event/event-mod.tc
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tools/testing/selftests/ftrace/test.d/event/event-mod.tc
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: event tracing - enable/disable with module event
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# requires: set_event "Can enable module events via: :mod:":README
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# flags: instance
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rmmod trace-events-sample ||:
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if ! modprobe trace-events-sample ; then
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echo "No trace-events sample module - please make CONFIG_SAMPLE_TRACE_EVENTS=m"
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exit_unresolved;
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fi
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trap "rmmod trace-events-sample" EXIT
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# Set events for the module
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echo ":mod:trace-events-sample" > set_event
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test_all_enabled() {
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# Check if more than one is enabled
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grep -q sample-trace:foo_bar set_event
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grep -q sample-trace:foo_bar_with_cond set_event
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grep -q sample-trace:foo_bar_with_fn set_event
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# All of them should be enabled. Check via the enable file
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val=`cat events/sample-trace/enable`
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if [ $val -ne 1 ]; then
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exit_fail
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fi
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}
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clear_events() {
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echo > set_event
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val=`cat events/enable`
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if [ "$val" != "0" ]; then
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exit_fail
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fi
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count=`cat set_event | wc -l`
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if [ $count -ne 0 ]; then
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exit_fail
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fi
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}
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test_all_enabled
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echo clear all events
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echo 0 > events/enable
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echo Confirm the events are disabled
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val=`cat events/sample-trace/enable`
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if [ $val -ne 0 ]; then
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exit_fail
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fi
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echo And the set_event file is empty
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cnt=`wc -l set_event`
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if [ $cnt -ne 0 ]; then
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exit_fail
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fi
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echo now enable all events
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echo 1 > events/enable
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echo Confirm the events are enabled again
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val=`cat events/sample-trace/enable`
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if [ $val -ne 1 ]; then
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exit_fail
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fi
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echo disable just the module events
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echo '!:mod:trace-events-sample' >> set_event
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echo Should have mix of events enabled
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val=`cat events/enable`
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if [ "$val" != "X" ]; then
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exit_fail
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fi
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echo Confirm the module events are disabled
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val=`cat events/sample-trace/enable`
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if [ $val -ne 0 ]; then
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exit_fail
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fi
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echo 0 > events/enable
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echo now enable the system events
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echo 'sample-trace:mod:trace-events-sample' > set_event
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test_all_enabled
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echo clear all events
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echo 0 > events/enable
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echo Confirm the events are disabled
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val=`cat events/sample-trace/enable`
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if [ $val -ne 0 ]; then
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exit_fail
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fi
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echo Test enabling foo_bar only
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echo 'foo_bar:mod:trace-events-sample' > set_event
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grep -q sample-trace:foo_bar set_event
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echo make sure nothing is found besides foo_bar
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if grep -q -v sample-trace:foo_bar set_event ; then
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exit_fail
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fi
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echo Append another using the system and event name
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echo 'sample-trace:foo_bar_with_cond:mod:trace-events-sample' >> set_event
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grep -q sample-trace:foo_bar set_event
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grep -q sample-trace:foo_bar_with_cond set_event
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count=`cat set_event | wc -l`
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if [ $count -ne 2 ]; then
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exit_fail
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fi
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clear_events
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rmmod trace-events-sample
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echo ':mod:trace-events-sample' > set_event
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echo make sure that the module shows up, and '-' is converted to '_'
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grep -q '\*:\*:mod:trace_events_sample' set_event
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modprobe trace-events-sample
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test_all_enabled
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clear_events
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rmmod trace-events-sample
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echo Enable just the system events
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echo 'sample-trace:mod:trace-events-sample' > set_event
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grep -q 'sample-trace:mod:trace_events_sample' set_event
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modprobe trace-events-sample
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test_all_enabled
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clear_events
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rmmod trace-events-sample
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echo Enable event with just event name
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echo 'foo_bar:mod:trace-events-sample' > set_event
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grep -q 'foo_bar:mod:trace_events_sample' set_event
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echo Enable another event with both system and event name
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echo 'sample-trace:foo_bar_with_cond:mod:trace-events-sample' >> set_event
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grep -q 'sample-trace:foo_bar_with_cond:mod:trace_events_sample' set_event
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echo Make sure the other event was still there
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grep -q 'foo_bar:mod:trace_events_sample' set_event
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modprobe trace-events-sample
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echo There should be no :mod: cached events
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if grep -q ':mod:' set_event; then
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exit_fail
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fi
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echo two events should be enabled
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count=`cat set_event | wc -l`
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if [ $count -ne 2 ]; then
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exit_fail
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fi
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echo only two events should be enabled
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val=`cat events/sample-trace/enable`
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if [ "$val" != "X" ]; then
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exit_fail
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fi
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val=`cat events/sample-trace/foo_bar/enable`
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if [ "$val" != "1" ]; then
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exit_fail
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fi
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val=`cat events/sample-trace/foo_bar_with_cond/enable`
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if [ "$val" != "1" ]; then
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exit_fail
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fi
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clear_trace