From: Masami Hiramatsu (Google) <mhira...@kernel.org> Add a test case for tracepoint events on modules. This checks if it can add and remove the events correctly.
Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org> --- Changes in v3: - Add not-loaded module test. --- tools/testing/selftests/ftrace/config | 1 .../test.d/dynevent/add_remove_tprobe_module.tc | 61 ++++++++++++++++++++ 2 files changed, 62 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe_module.tc diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config index 048a312abf40..544de0db5f58 100644 --- a/tools/testing/selftests/ftrace/config +++ b/tools/testing/selftests/ftrace/config @@ -20,6 +20,7 @@ CONFIG_PREEMPT_TRACER=y CONFIG_PROBE_EVENTS_BTF_ARGS=y CONFIG_SAMPLES=y CONFIG_SAMPLE_FTRACE_DIRECT=m +CONFIG_SAMPLE_TRACE_EVENTS=m CONFIG_SAMPLE_TRACE_PRINTK=m CONFIG_SCHED_TRACER=y CONFIG_STACK_TRACER=y diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe_module.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe_module.tc new file mode 100644 index 000000000000..d319d5ed4226 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_tprobe_module.tc @@ -0,0 +1,61 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Generic dynamic event - add/remove tracepoint probe events on module +# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README + +rmmod trace-events-sample ||: +if ! modprobe trace-events-sample ; then + echo "No trace-events sample module - please make CONFIG_SAMPLE_TRACE_EVENTS=m" + exit_unresolved; +fi +trap "rmmod trace-events-sample" EXIT + +echo 0 > events/enable +echo > dynamic_events + +TRACEPOINT1=foo_bar +TRACEPOINT2=foo_bar_with_cond + +echo "t:myevent1 $TRACEPOINT1" >> dynamic_events +echo "t:myevent2 $TRACEPOINT2" >> dynamic_events + +grep -q myevent1 dynamic_events +grep -q myevent2 dynamic_events +test -d events/tracepoints/myevent1 +test -d events/tracepoints/myevent2 + +echo "-:myevent2" >> dynamic_events + +grep -q myevent1 dynamic_events +! grep -q myevent2 dynamic_events + +echo > dynamic_events + +clear_trace + +:;: "Try to put a probe on a tracepoint in non-loaded module" ;: +rmmod trace-events-sample + +echo "t:myevent1 $TRACEPOINT1" >> dynamic_events +echo "t:myevent2 $TRACEPOINT2" >> dynamic_events + +grep -q myevent1 dynamic_events +grep -q myevent2 dynamic_events +test -d events/tracepoints/myevent1 +test -d events/tracepoints/myevent2 + +echo 1 > events/tracepoints/enable + +modprobe trace-events-sample + +sleep 2 + +grep -q "myevent1" trace +grep -q "myevent2" trace + +rmmod trace-events-sample +trap "" EXIT + +echo 0 > events/tracepoints/enable +echo > dynamic_events +clear_trace
