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

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Date:   Sun, 26 Jun 2022 01:03:31 +0900
From:   Masami Hiramatsu (Google) <mhiramat@...nel.org>
To:     Jeff Xie <xiehuan09@...il.com>
Cc:     rostedt@...dmis.org, mingo@...hat.com, mhiramat@...nel.org,
        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,

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.

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>