From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id IWETOCAL6F/CDwAAWB0awg (envelope-from ) for ; Sat, 26 Dec 2020 23:18:40 -0500 Received: by simark.ca (Postfix, from userid 112) id D98C21F0AA; Sat, 26 Dec 2020 23:18:40 -0500 (EST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 39C921E552 for ; Sat, 26 Dec 2020 23:18:40 -0500 (EST) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 634C2384A02A; Sun, 27 Dec 2020 04:18:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 634C2384A02A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1609042719; bh=Jor8MCLiDnyIOW8tpi2E8IBQ/HqTvTlaCScy0FPF2hU=; h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=YUybyNuASIBlvcETFa3ONWm64pmWOycQ21LwEOthMEk2Fxpcf46xFn7YHKkJYJE3W QbnzVVwm273ScVU1AuizGRjt8s9BsD4UUCTlZQlZR0qsC8o7nKL0YJrkYNQVpbgMqd xNlUHGA366wlFkmN79/pIypdSg+omHiMQ05JeLEo= Received: from smtp.polymtl.ca (smtp.polymtl.ca [132.207.4.11]) by sourceware.org (Postfix) with ESMTPS id 6CC1F3857C60 for ; Sun, 27 Dec 2020 04:18:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 6CC1F3857C60 Received: from simark.ca (simark.ca [158.69.221.121]) (authenticated bits=0) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id 0BR4IVZk002185 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 26 Dec 2020 23:18:35 -0500 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp.polymtl.ca 0BR4IVZk002185 Received: from [10.0.0.213] (192-222-157-6.qc.cable.ebox.net [192.222.157.6]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by simark.ca (Postfix) with ESMTPSA id 07A7B1E552; Sat, 26 Dec 2020 23:18:31 -0500 (EST) Subject: Re: [PATCH v3 21/24] Extend "x" and "print" commands to support memory tagging To: Luis Machado , gdb-patches@sourceware.org References: <20201109170435.15766-1-luis.machado@linaro.org> <20201109170435.15766-22-luis.machado@linaro.org> Message-ID: <19b87dc2-9192-c5d5-9534-b21d747e7e8c@polymtl.ca> Date: Sat, 26 Dec 2020 23:18:30 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20201109170435.15766-22-luis.machado@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Poly-FromMTA: (simark.ca [158.69.221.121]) at Sun, 27 Dec 2020 04:18:31 +0000 X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Simon Marchi via Gdb-patches Reply-To: Simon Marchi Cc: david.spickett@linaro.org Errors-To: gdb-patches-bounces@sourceware.org Sender: "Gdb-patches" On 2020-11-09 12:04 p.m., Luis Machado via Gdb-patches wrote: > The "print" command will point out any possible tag mismatches it finds > when dealing with pointers, in case such a pointer is tagged. No additional > modifiers are needed. > > Suppose we have a pointer "p" with value 0x1234 (logical tag 0x0) and that we > have an allocation tag of 0x1 for that particular area of memory. This is the > expected output: > > (gdb) p/x p > Logical tag (0x0) does not match the allocation tag (0x1). > $1 = 0x1234 Should there be an option to print to enable/disable this behavior? Something like "print -memory-tags-violations ", and a corresponding "set print memory-tags-violations "? Simon