1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Kprobe dynamic event - probing module 4 5[ -f kprobe_events ] || exit_unsupported # this is configurable 6 7rmmod trace-printk ||: 8if ! modprobe trace-printk ; then 9 echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK= 10m" 11 exit_unresolved; 12fi 13 14MOD=trace_printk 15FUNC=trace_printk_irq_work 16 17:;: "Add an event on a module function without specifying event name" ;: 18 19echo "p $MOD:$FUNC" > kprobe_events 20PROBE_NAME=`echo $MOD:$FUNC | tr ".:" "_"` 21test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure 22 23:;: "Add an event on a module function with new event name" ;: 24 25echo "p:event1 $MOD:$FUNC" > kprobe_events 26test -d events/kprobes/event1 || exit_failure 27 28:;: "Add an event on a module function with new event and group name" ;: 29 30echo "p:kprobes1/event1 $MOD:$FUNC" > kprobe_events 31test -d events/kprobes1/event1 || exit_failure 32 33:;: "Remove target module, but event still be there" ;: 34if ! rmmod trace-printk ; then 35 echo "Failed to unload module - please enable CONFIG_MODULE_UNLOAD" 36 exit_unresolved; 37fi 38test -d events/kprobes1/event1 39 40:;: "Check posibility to defining events on unloaded module";: 41echo "p:event2 $MOD:$FUNC" >> kprobe_events 42 43:;: "Target is gone, but we can prepare for next time";: 44echo 1 > events/kprobes1/event1/enable 45 46:;: "Load module again, which means the event1 should be recorded";: 47modprobe trace-printk 48grep "event1:" trace 49 50:;: "Remove the module again and check the event is not locked" 51rmmod trace-printk 52echo 0 > events/kprobes1/event1/enable 53echo "-:kprobes1/event1" >> kprobe_events 54