From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 3030CA04DD; Wed, 28 Oct 2020 17:28:14 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 622CCBE5D; Wed, 28 Oct 2020 17:27:30 +0100 (CET) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id C753449E0; Wed, 28 Oct 2020 17:27:24 +0100 (CET) IronPort-SDR: YAGlN0HxB6AgHsh1KB3eOZul7exBNqliU2GgQkBNUwXjLkKI6gYDlVvmfjqOVkVmo3L3ReqPrr FDeEKuIlur6w== X-IronPort-AV: E=McAfee;i="6000,8403,9788"; a="165699156" X-IronPort-AV: E=Sophos;i="5.77,427,1596524400"; d="scan'208";a="165699156" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2020 09:27:24 -0700 IronPort-SDR: 6z10H/kwjYjmaA7VRhuC0ZQ6FjCa3th3RDtbzcufGRW/VZxeOg+A86gFr33dmN+mmO25SGLnJ0 8XNAF/mTNR0Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,427,1596524400"; d="scan'208";a="334787994" Received: from silpixa00399126.ir.intel.com ([10.237.222.4]) by orsmga002.jf.intel.com with ESMTP; 28 Oct 2020 09:27:23 -0700 From: Bruce Richardson To: dev@dpdk.org Cc: Bruce Richardson , stable@dpdk.org, Radu Nicolau , Anatoly Burakov Date: Wed, 28 Oct 2020 16:27:02 +0000 Message-Id: <20201028162702.969509-4-bruce.richardson@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201028162702.969509-1-bruce.richardson@intel.com> References: <20200814110045.217724-1-bruce.richardson@intel.com> <20201028162702.969509-1-bruce.richardson@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v3 3/3] examples/mp_server: clear string truncation warning X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Compiling with GCC 9.3 on Ubuntu 20.04 gives a warning about possible string truncation when getting the RX queue name: In file included from init.c:36: init.c: In function ‘init’: ../shared/common.h:38:28: warning: ‘%u’ directive output may be truncated writing between 1 and 10 bytes into a region of size 8 [-Wformat-truncation=] 38 | #define MP_CLIENT_RXQ_NAME "MProc_Client_%u_RX" | ^~~~~~~~~~~~~~~~~~~~ ../shared/common.h:52:35: note: in expansion of macro ‘MP_CLIENT_RXQ_NAME’ 52 | snprintf(buffer, sizeof(buffer), MP_CLIENT_RXQ_NAME, id); | ^~~~~~~~~~~~~~~~~~ This is a false positive, as the value of the "id" is limited to 255, being stored in the app as a uint8_t value, removing the possibility of the %u being replaced by anything other then 3 characters max (rather than up to 10 as thought by the compiler). Therefore, the warning can be easily removed by changing the type of the "id" parameter to the local function from "unsigned" to "uint8_t" also, ensuring the compiler is aware of the range limit. Cc: stable@dpdk.org Signed-off-by: Bruce Richardson Acked-by: Radu Nicolau --- examples/multi_process/client_server_mp/shared/common.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/multi_process/client_server_mp/shared/common.h b/examples/multi_process/client_server_mp/shared/common.h index 6dd43fcac..76beca010 100644 --- a/examples/multi_process/client_server_mp/shared/common.h +++ b/examples/multi_process/client_server_mp/shared/common.h @@ -43,7 +43,7 @@ struct port_info { * Given the rx queue name template above, get the queue name */ static inline const char * -get_rx_queue_name(unsigned id) +get_rx_queue_name(uint8_t id) { /* buffer for return value. Size calculated by %u being replaced * by maximum 3 digits (plus an extra byte for safety) */ -- 2.25.1