From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751199Ab3LJFBr (ORCPT ); Tue, 10 Dec 2013 00:01:47 -0500 Received: from lgeamrelo02.lge.com ([156.147.1.126]:59056 "EHLO LGEAMRELO02.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750748Ab3LJFBq (ORCPT ); Tue, 10 Dec 2013 00:01:46 -0500 X-AuditID: 9c93017e-b7bb9ae000000ec8-3a-52a6a0389d33 From: Namhyung Kim To: Steven Rostedt Cc: Arnaldo Carvalho de Melo , Frederic Weisbecker , Ingo Molnar , Jiri Olsa , LKML , Namhyung Kim Subject: Re: [PATCH 01/14] tools lib traceevent: Get rid of malloc_or_die() in show_error() References: <1386567251-22751-1-git-send-email-namhyung@kernel.org> <1386567251-22751-2-git-send-email-namhyung@kernel.org> <20131209183009.GC8098@ghostprotocols.net> <20131209140342.5f72298f@gandalf.local.home> <20131209191439.GG8098@ghostprotocols.net> <20131209142350.5d23108c@gandalf.local.home> <87mwk9jwcf.fsf@sejong.aot.lge.com> <20131209211410.01fcaebf@gandalf.local.home> Date: Tue, 10 Dec 2013 14:01:44 +0900 In-Reply-To: <20131209211410.01fcaebf@gandalf.local.home> (Steven Rostedt's message of "Mon, 9 Dec 2013 21:14:10 -0500") Message-ID: <878uvtjo3r.fsf@sejong.aot.lge.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 9 Dec 2013 21:14:10 -0500, Steven Rostedt wrote: > On Tue, 10 Dec 2013 11:03:44 +0900 > Namhyung Kim wrote: > >> What about returning error code rather than string? This way we won't >> worry about the allocation of the error string itself. >> >> But the downside of it is loosing a positional info of the error. >> Hmm.. what about using a static buffer in pevent for it then? > > A static buffer may be the solution. Never need to worry about > allocating it on error, as it will already be allocated. And we can add > APIs to print it nicely. > > Perhaps call it > > pevent->filter_error_buffer > > ? Okay, I'll go with this. Thanks, Namhyung