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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-08-30 23:17:38 +0900 |
|---|---|---|
| committer | Shuah Khan (Samsung OSG) <shuah@kernel.org> | 2018-10-24 14:49:35 -0600 |
| commit | af2a0750f374935c07b8beab78d6032b1ca2218d (patch) | |
| tree | 0106a715c64efea24c371a04afe7c4762648f5b1 /tools/testing/selftests/ftrace/test.d | |
| parent | cec3adf5f57160d829a033bcb578c3dd0a90c693 (diff) | |
| download | linux-af2a0750f374935c07b8beab78d6032b1ca2218d.tar.gz | |
selftests/ftrace: Improve kprobe on module testcase to load/unload module
Improve kprobe events on module testcase to check module
load/unload with disabled/enabled events. This also change
the target module to trace_printk.ko, so it depends on
CONFIG_SAMPLE_TRACE_PRINTK=m.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Diffstat (limited to 'tools/testing/selftests/ftrace/test.d')
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc index ec6c5fffef1e..d861bd776c5e 100644 --- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc @@ -4,11 +4,18 @@ [ -f kprobe_events ] || exit_unsupported # this is configurable +rmmod trace-printk ||: +if ! modprobe trace-printk ; then + echo "No trace-printk sample module - please make CONFIG_SAMPLE_TRACE_PRINTK= +m" + exit_unresolved; +fi + +MOD=trace_printk +FUNC=trace_printk_irq_work + :;: "Add an event on a module function without specifying event name" ;: -MOD=`lsmod | head -n 2 | tail -n 1 | cut -f1 -d" "` -FUNC=`grep -m 1 ".* t .*\\[$MOD\\]" /proc/kallsyms | xargs | cut -f3 -d" "` -[ "x" != "x$MOD" -a "y" != "y$FUNC" ] || exit_unresolved echo "p $MOD:$FUNC" > kprobe_events PROBE_NAME=`echo $MOD:$FUNC | tr ".:" "_"` test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure @@ -22,3 +29,25 @@ test -d events/kprobes/event1 || exit_failure echo "p:kprobes1/event1 $MOD:$FUNC" > kprobe_events test -d events/kprobes1/event1 || exit_failure + +:;: "Remove target module, but event still be there" ;: +if ! rmmod trace-printk ; then + echo "Failed to unload module - please enable CONFIG_MODULE_UNLOAD" + exit_unresolved; +fi +test -d events/kprobes1/event1 + +:;: "Check posibility to defining events on unloaded module";: +echo "p:event2 $MOD:$FUNC" >> kprobe_events + +:;: "Target is gone, but we can prepare for next time";: +echo 1 > events/kprobes1/event1/enable + +:;: "Load module again, which means the event1 should be recorded";: +modprobe trace-printk +grep "event1:" trace + +:;: "Remove the module again and check the event is not locked" +rmmod trace-printk +echo 0 > events/kprobes1/event1/enable +echo "-:kprobes1/event1" >> kprobe_events |