| #!/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 |
