linux-kernel - Re: [PATCH v12 3/4] trace/objtrace: Add testcases for objtrace

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Date:   Sun, 26 Jun 2022 01:05:20 +0800
From:   Jeff Xie <xiehuan09@...il.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>, mingo@...hat.com,
        Tom Zanussi <zanussi@...nel.org>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH v12 3/4] trace/objtrace: Add testcases for objtrace

Hi Masami,

On Sun, Jun 26, 2022 at 12:03 AM Masami Hiramatsu <mhiramat@...nel.org> wrote:
>
> Hi,
>
> This looks good to me (and I tested).
>
> Tested-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> Acked-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
>
> BTW, please use 'selftests/ftrace:' tag instead of (or in addition to)
> 'trace/objtrace:' for the ftracetest patch. And please Cc to
> linux-kselftest@...r.kernel.org and Shuah Khan.

Thanks for the reminder, I will do it like this in my next version.

> Thank you,
>
> On Tue,  7 Jun 2022 00:09:42 +0800
> Jeff Xie <xiehuan09@...il.com> wrote:
>
> > Add a series of testcases to illustrate correct and incorrect usage of
> > objtrace trigger.
> >
> > Signed-off-by: Jeff Xie <xiehuan09@...il.com>
> > ---
> >  .../ftrace/test.d/trigger/trigger-objtrace.tc | 41 +++++++++++++++++++
> >  1 file changed, 41 insertions(+)
> >  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc
> >
> > diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc
> > new file mode 100644
> > index 000000000000..d894442b6a30
> > --- /dev/null
> > +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-objtrace.tc
> > @@ -0,0 +1,41 @@
> > +#!/bin/sh
> > +# SPDX-License-Identifier: GPL-2.0
> > +# description: event trigger - test objtrace-trigger
> > +# requires: kprobe_events "objtrace":README
> > +
> > +fail() { #msg
> > +    echo $1
> > +    exit_fail
> > +}
> > +
> > +echo 'p bio_add_page arg1=$arg1 arg2=$arg2' > kprobe_events
> > +
> > +FEATURE=`grep objtrace events/kprobes/p_bio_add_page_0/trigger`
> > +if [ -z "$FEATURE" ]; then
> > +    echo "objtrace trigger is not supported"
> > +    exit_unsupported
> > +fi
> > +
> > +echo "Test objtrace trigger"
> > +echo 'objtrace:add:arg1,0x28:u32:1 if comm == "cat"' > \
> > +     events/kprobes/p_bio_add_page_0/trigger
> > +if [ -z $? ]; then
> > +     fail "objtrace trigger syntax error"
> > +fi
> > +
> > +echo "Test objtrace semantic errors"
> > +
> > +# Being lack of objtrace command
> > +! echo 'objtrace:arg1,0x28:u32:1' > events/kprobes/p_bio_add_page_0/trigger
> > +# Bad parameter name
> > +! echo 'objtrace:add:argx:u32:1' > events/kprobes/p_bio_add_page_0/trigger
> > +# The parameter existed on event
> > +! echo 'objtrace:add:arg2:u32:1' > events/kprobes/p_bio_add_page_0/trigger
> > +
> > +echo "reset objtrace trigger"
> > +
> > +echo '!objtrace:add:arg1,0x28:u32' > \
> > +     events/kprobes/p_bio_add_page_0/trigger
> > +echo '-:p_bio_add_page_0' >> ./kprobe_events
> > +
> > +exit 0
> > --
> > 2.25.1
> >
>
>
> --
> Masami Hiramatsu (Google) <mhiramat@...nel.org>

Thanks,
JeffXie