linux-kernel - Re: [PATCH 09/14] tools lib traceevent: Get rid of die() in add

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Message-ID: <87fvq2mrw1.fsf@sejong.aot.lge.com>
Date:	Mon, 09 Dec 2013 15:59:26 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Ilia Mirkin <imirkin@...m.mit.edu>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 09/14] tools lib traceevent: Get rid of die() in add_right()

Hi Ilia,

On Mon, 9 Dec 2013 01:28:26 -0500, Ilia Mirkin wrote:
> On Mon, Dec 9, 2013 at 12:34 AM, Namhyung Kim <namhyung@...nel.org> wrote:
>> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
>> ---
>>  tools/lib/traceevent/parse-filter.c | 12 +++++++++---
>>  1 file changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
>> index 5efe66a682bd..a1ad609a860f 100644
>> --- a/tools/lib/traceevent/parse-filter.c
>> +++ b/tools/lib/traceevent/parse-filter.c
>> @@ -583,12 +583,18 @@ static int add_right(struct filter_arg *op, struct filter_arg *arg,
>>                         op->str.type = op_type;
>>                         op->str.field = left->field.field;
>>                         op->str.val = strdup(str);
>> -                       if (!op->str.val)
>> -                               die("malloc string");
>> +                       if (!op->str.val) {
>> +                               show_error(error_str, "Failed to allocate string filter");
>> +                               return -1;
>> +                       }
>>                         /*
>>                          * Need a buffer to copy data for tests
>>                          */
>> -                       op->str.buffer = malloc_or_die(op->str.field->size + 1);
>> +                       op->str.buffer = malloc(op->str.field->size + 1);
>> +                       if (op->str.buffer) {
>
> That should probably be
>
> if (!op->str.buffer)

Argh.. you're right!

>
> Also, should you free op->str.val? Perhaps the surrounding code takes
> care of that.

Yeah, it'll be handled by the caller - process_filter().

Thanks for the quick review!
Namhyung

>
>> +                               show_error(error_str, "Failed to allocate string filter");
>> +                               return -1;
>> +                       }
>>                         /* Null terminate this buffer */
>>                         op->str.buffer[op->str.field->size] = 0;
>>
>> --
>> 1.7.11.7
>>
>> --
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