From patchwork Mon May 23 14:24:54 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingjing Wu X-Patchwork-Id: 12941 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 3D1815902; Mon, 23 May 2016 16:25:05 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 1F78058E1 for ; Mon, 23 May 2016 16:25:03 +0200 (CEST) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP; 23 May 2016 07:25:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,356,1459839600"; d="scan'208";a="812911069" Received: from shvmail01.sh.intel.com ([10.239.29.42]) by orsmga003.jf.intel.com with ESMTP; 23 May 2016 07:25:02 -0700 Received: from shecgisg004.sh.intel.com (shecgisg004.sh.intel.com [10.239.29.89]) by shvmail01.sh.intel.com with ESMTP id u4NEP0qc006769; Mon, 23 May 2016 22:25:00 +0800 Received: from shecgisg004.sh.intel.com (localhost [127.0.0.1]) by shecgisg004.sh.intel.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id u4NEOvFd028518; Mon, 23 May 2016 22:24:59 +0800 Received: (from wujingji@localhost) by shecgisg004.sh.intel.com (8.13.6/8.13.6/Submit) id u4NEOvWN028514; Mon, 23 May 2016 22:24:57 +0800 From: Jingjing Wu To: david.marchand@6wind.com Cc: dev@dpdk.org, jingjing.wu@intel.com, ziye.yang@intel.com, bruce.richardson@intel.com Date: Mon, 23 May 2016 22:24:54 +0800 Message-Id: <1464013494-28484-1-git-send-email-jingjing.wu@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1463116489-31805-1-git-send-email-jingjing.wu@intel.com> References: <1463116489-31805-1-git-send-email-jingjing.wu@intel.com> Subject: [dpdk-dev] [PATCH v2] doc: add known issue with EAL argv X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch docs the issue on EAL argument that the last EAL argument is replaced by program name in argv[]. Reported-by: Ziye Yang Signed-off-by: Jingjing Wu Acked-by: John McNamara --- doc/guides/rel_notes/known_issues.rst | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index 923a202..8ca2a86 100644 --- a/doc/guides/rel_notes/known_issues.rst +++ b/doc/guides/rel_notes/known_issues.rst @@ -618,3 +618,24 @@ DPDK may not build on some Intel CPUs using clang < 3.7.0 **Driver/Module**: Environment Abstraction Layer (EAL). + + +The last EAL argument is replaced by the program name in argv[] +----------------------------------------------------------- + +**Description**: + The last EAL argument is replaced by program name in ``argv[]`` after ``eal_parse_args`` is called. + This is the intended behavior but it causes the pointer to the last EAL argument to be lost. + +**Implication**: + If the last EAL argument in ``argv[]`` is generated by a malloc function, changing it will cause memory + issues when freeing the argument. + +**Resolution/Workaround**: + An application should not consider the value in ``argv[]`` as unchanged. + +**Affected Environment/Platform**: + ALL. + +**Driver/Module**: + Environment Abstraction Layer (EAL).