Re: [PATCH] kselftests/ftrace : Add event trigger testcases

[Namhyung Kim]

Hi Masami,

On Sat, Jul 25, 2015 at 10:13:10AM +0900, Masami Hiramatsu wrote:
> This adds simple event trigger testcases for ftracetest,
> which covers following triggers.
>  - traceon-traceoff trigger
>  - enable/disable_event trigger
>  - snapshot trigger
>  - stacktrace trigger
>  - trigger filters
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
> Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> Cc: Tom Zanussi <tom.zanussi@xxxxxxxxxxxxxxx>
> ---
>  tools/testing/selftests/ftrace/test.d/functions    |    9 +++
>  .../ftrace/test.d/trigger/trigger-eventonoff.tc    |   64 ++++++++++++++++++++
>  .../ftrace/test.d/trigger/trigger-filter.tc        |   59 ++++++++++++++++++
>  .../ftrace/test.d/trigger/trigger-snapshot.tc      |   56 ++++++++++++++++++
>  .../ftrace/test.d/trigger/trigger-stacktrace.tc    |   53 +++++++++++++++++
>  .../ftrace/test.d/trigger/trigger-traceonoff.tc    |   58 ++++++++++++++++++
>  6 files changed, 299 insertions(+)
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-eventonoff.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-filter.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-snapshot.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-stacktrace.tc
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-traceonoff.tc
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
> index 5d8cd06..36ca18e 100644
> --- a/tools/testing/selftests/ftrace/test.d/functions
> +++ b/tools/testing/selftests/ftrace/test.d/functions
> @@ -14,3 +14,12 @@ enable_tracing() { # start trace recording
>  reset_tracer() { # reset the current tracer
>      echo nop > current_tracer
>  }
> +
> +reset_trigger() { # reset all current setting triggers
> +    grep -v ^# events/*/*/trigger |
> +    while read line; do
> +        cmd=`echo $line | cut -f2- -d:`
> +	echo "!$cmd" > `echo $line | cut -f1 -d:`

Broken whitespaces?


> +    done
> +}
> +
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-eventonoff.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-eventonoff.tc
> new file mode 100644
> index 0000000..1a94450
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-eventonoff.tc
> @@ -0,0 +1,64 @@
> +#!/bin/sh
> +# description: event trigger - test event enable/disable trigger
> +
> +do_reset() {
> +    reset_trigger
> +    echo > set_event
> +    clear_trace
> +}
> +
> +fail() { #msg
> +    do_reset
> +    echo $1
> +    exit $FAIL
> +}
> +
> +if [ ! -f set_event -o ! -d events/sched ]; then
> +    echo "event tracing is not supported"
> +    exit_unsupported
> +fi
> +
> +if [ ! -f events/sched/sched_process_fork/trigger ]; then
> +    echo "event trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +reset_tracer
> +do_reset
> +
> +FEATURE=`grep enable_event events/sched/sched_process_fork/trigger`
> +if [ -z "$FEATURE" ]; then
> +    echo "event enable/disable trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +echo "Test enable_event trigger"
> +echo 0 > events/sched/sched_switch/enable
> +echo 'enable_event:sched:sched_switch' > events/sched/sched_process_fork/trigger
> +( echo "forked")
> +if [ `cat events/sched/sched_switch/enable` != '1*' ]; then
> +    fail "enable_event trigger on sched_process_fork did not work"
> +fi
> +
> +reset_trigger
> +
> +echo "Test disable_event trigger"
> +echo 1 > events/sched/sched_switch/enable
> +echo 'disable_event:sched:sched_switch' > events/sched/sched_process_fork/trigger
> +( echo "forked")
> +if [ `cat events/sched/sched_switch/enable` != '0*' ]; then
> +    fail "disable_event trigger on sched_process_fork did not work"
> +fi
> +
> +reset_trigger
> +
> +echo "Test semantic error for event enable/disable trigger"
> +! echo 'enable_event:nogroup:noevent' > events/sched/sched_process_fork/trigger
> +! echo 'disable_event+1' > events/sched/sched_process_fork/trigger
> +echo 'enable_event:sched:sched_switch' > events/sched/sched_process_fork/trigger
> +! echo 'enable_event:sched:sched_switch' > events/sched/sched_process_fork/trigger
> +! echo 'disable_event:sched:sched_switch' > events/sched/sched_process_fork/trigger

I don't know whether the '!' sign works for all shells.  Btw, what is
the last two lines for?


> +
> +do_reset
> +
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-filter.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-filter.tc
> new file mode 100644
> index 0000000..514e466
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-filter.tc
> @@ -0,0 +1,59 @@
> +#!/bin/sh
> +# description: event trigger - test trigger filter
> +
> +do_reset() {
> +    reset_trigger
> +    echo > set_event
> +    clear_trace
> +}
> +
> +fail() { #msg
> +    do_reset
> +    echo $1
> +    exit $FAIL
> +}
> +
> +if [ ! -f set_event -o ! -d events/sched ]; then
> +    echo "event tracing is not supported"
> +    exit_unsupported
> +fi
> +
> +if [ ! -f events/sched/sched_process_fork/trigger ]; then
> +    echo "event trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +reset_tracer
> +do_reset
> +
> +echo "Test trigger filter"
> +echo 1 > tracing_on
> +echo 'traceoff if child_pid == 0' > events/sched/sched_process_fork/trigger

What about checking child_comm too to verify complex filter pattern
with string type?  Maybe something like below (not tested..)?

echo 'traceoff if child_pid != 0 && child_comm ~ '*sh' > events/.../trigger

Thanks,
Namhyung


> +( echo "forked")
> +if [ `cat tracing_on` -ne 1 ]; then
> +    fail "traceoff trigger on sched_process_fork did not work"
> +fi
> +
> +reset_trigger
> +
> +echo "Test semantic error for trigger filter"
> +! echo 'traceoff if a' > events/sched/sched_process_fork/trigger
> +! echo 'traceoff if common_pid=0' > events/sched/sched_process_fork/trigger
> +! echo 'traceoff if common_pid==b' > events/sched/sched_process_fork/trigger
> +echo 'traceoff if common_pid == 0' > events/sched/sched_process_fork/trigger
> +echo '!traceoff' > events/sched/sched_process_fork/trigger
> +! echo 'traceoff if common_pid == child_pid' > events/sched/sched_process_fork/trigger
> +echo 'traceoff if common_pid <= 0' > events/sched/sched_process_fork/trigger
> +echo '!traceoff' > events/sched/sched_process_fork/trigger
> +echo 'traceoff if common_pid >= 0' > events/sched/sched_process_fork/trigger
> +echo '!traceoff' > events/sched/sched_process_fork/trigger
> +echo 'traceoff if parent_pid >= 0 && child_pid >= 0' > events/sched/sched_process_fork/trigger
> +echo '!traceoff' > events/sched/sched_process_fork/trigger
> +echo 'traceoff if parent_pid >= 0 || child_pid >= 0' > events/sched/sched_process_fork/trigger
> +echo '!traceoff' > events/sched/sched_process_fork/trigger
> +
> +
> +
> +do_reset
> +
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-snapshot.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-snapshot.tc
> new file mode 100644
> index 0000000..f84b80d
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-snapshot.tc
> @@ -0,0 +1,56 @@
> +#!/bin/sh
> +# description: event trigger - test snapshot-trigger
> +
> +do_reset() {
> +    reset_trigger
> +    echo > set_event
> +    clear_trace
> +}
> +
> +fail() { #msg
> +    do_reset
> +    echo $1
> +    exit $FAIL
> +}
> +
> +if [ ! -f set_event -o ! -d events/sched ]; then
> +    echo "event tracing is not supported"
> +    exit_unsupported
> +fi
> +
> +if [ ! -f events/sched/sched_process_fork/trigger ]; then
> +    echo "event trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +reset_tracer
> +do_reset
> +
> +FEATURE=`grep snapshot events/sched/sched_process_fork/trigger`
> +if [ -z "$FEATURE" ]; then
> +    echo "snapshot trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +echo "Test snapshot tigger"
> +echo 0 > snapshot
> +echo 1 > events/sched/sched_process_fork/enable
> +( echo "forked")
> +echo 'snapshot:1' > events/sched/sched_process_fork/trigger
> +( echo "forked")
> +grep sched_process_fork snapshot > /dev/null || \
> +    fail "snapshot trigger on sched_process_fork did not work"
> +
> +reset_trigger
> +echo 0 > snapshot
> +echo 0 > events/sched/sched_process_fork/enable
> +
> +echo "Test snapshot semantic errors"
> +
> +! echo "snapshot+1" > events/sched/sched_process_fork/trigger
> +echo "snapshot" > events/sched/sched_process_fork/trigger
> +! echo "snapshot" > events/sched/sched_process_fork/trigger
> +
> +do_reset
> +
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-stacktrace.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-stacktrace.tc
> new file mode 100644
> index 0000000..9fa23b0
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-stacktrace.tc
> @@ -0,0 +1,53 @@
> +#!/bin/sh
> +# description: event trigger - test stacktrace-trigger
> +
> +do_reset() {
> +    reset_trigger
> +    echo > set_event
> +    clear_trace
> +}
> +
> +fail() { #msg
> +    do_reset
> +    echo $1
> +    exit $FAIL
> +}
> +
> +if [ ! -f set_event -o ! -d events/sched ]; then
> +    echo "event tracing is not supported"
> +    exit_unsupported
> +fi
> +
> +if [ ! -f events/sched/sched_process_fork/trigger ]; then
> +    echo "event trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +reset_tracer
> +do_reset
> +
> +FEATURE=`grep stacktrace events/sched/sched_process_fork/trigger`
> +if [ -z "$FEATURE" ]; then
> +    echo "stacktrace trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +echo "Test stacktrace tigger"
> +echo 0 > trace
> +echo 0 > options/stacktrace
> +echo 'stacktrace' > events/sched/sched_process_fork/trigger
> +( echo "forked")
> +grep "<stack trace>" trace > /dev/null || \
> +    fail "stacktrace trigger on sched_process_fork did not work"
> +
> +reset_trigger
> +
> +echo "Test stacktrace semantic errors"
> +
> +! echo "stacktrace:foo" > events/sched/sched_process_fork/trigger
> +echo "stacktrace" > events/sched/sched_process_fork/trigger
> +! echo "stacktrace" > events/sched/sched_process_fork/trigger
> +
> +do_reset
> +
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-traceonoff.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-traceonoff.tc
> new file mode 100644
> index 0000000..87648e5
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-traceonoff.tc
> @@ -0,0 +1,58 @@
> +#!/bin/sh
> +# description: event trigger - test traceon/off trigger
> +
> +do_reset() {
> +    reset_trigger
> +    echo > set_event
> +    clear_trace
> +}
> +
> +fail() { #msg
> +    do_reset
> +    echo $1
> +    exit $FAIL
> +}
> +
> +if [ ! -f set_event -o ! -d events/sched ]; then
> +    echo "event tracing is not supported"
> +    exit_unsupported
> +fi
> +
> +if [ ! -f events/sched/sched_process_fork/trigger ]; then
> +    echo "event trigger is not supported"
> +    exit_unsupported
> +fi
> +
> +reset_tracer
> +do_reset
> +
> +echo "Test traceoff trigger"
> +echo 1 > tracing_on
> +echo 'traceoff' > events/sched/sched_process_fork/trigger
> +( echo "forked")
> +if [ `cat tracing_on` -ne 0 ]; then
> +    fail "traceoff trigger on sched_process_fork did not work"
> +fi
> +
> +reset_trigger
> +
> +echo "Test traceon trigger"
> +echo 0 > tracing_on
> +echo 'traceon' > events/sched/sched_process_fork/trigger
> +( echo "forked")
> +if [ `cat tracing_on` -ne 1 ]; then
> +    fail "traceoff trigger on sched_process_fork did not work"
> +fi
> +
> +reset_trigger
> +
> +echo "Test semantic error for traceoff/on trigger"
> +! echo 'traceoff:badparam' > events/sched/sched_process_fork/trigger
> +! echo 'traceoff+0' > events/sched/sched_process_fork/trigger
> +echo 'traceon' > events/sched/sched_process_fork/trigger
> +! echo 'traceon' > events/sched/sched_process_fork/trigger
> +! echo 'traceoff' > events/sched/sched_process_fork/trigger
> +
> +do_reset
> +
> +exit 0
> 
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