From 117cfdf347bb1deb39b37ef70ae6e903daa3c994 Mon Sep 17 00:00:00 2001 From: David Bremner Date: Sun, 28 Apr 2013 08:53:33 +2100 Subject: [PATCH] Re: [PATCH] don't store temporary value returned from c_str() --- 4c/4a1e2ee3624e19eda1f0c700b52b5a29ab1a02 | 75 +++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 4c/4a1e2ee3624e19eda1f0c700b52b5a29ab1a02 diff --git a/4c/4a1e2ee3624e19eda1f0c700b52b5a29ab1a02 b/4c/4a1e2ee3624e19eda1f0c700b52b5a29ab1a02 new file mode 100644 index 000000000..207d0023a --- /dev/null +++ b/4c/4a1e2ee3624e19eda1f0c700b52b5a29ab1a02 @@ -0,0 +1,75 @@ +Return-Path: +X-Original-To: notmuch@notmuchmail.org +Delivered-To: notmuch@notmuchmail.org +Received: from localhost (localhost [127.0.0.1]) + by olra.theworths.org (Postfix) with ESMTP id 9D76F431FB6 + for ; Sat, 27 Apr 2013 04:53:45 -0700 (PDT) +X-Virus-Scanned: Debian amavisd-new at olra.theworths.org +X-Spam-Flag: NO +X-Spam-Score: 0 +X-Spam-Level: +X-Spam-Status: No, score=0 tagged_above=-999 required=5 tests=[none] + autolearn=disabled +Received: from olra.theworths.org ([127.0.0.1]) + by localhost (olra.theworths.org [127.0.0.1]) (amavisd-new, port 10024) + with ESMTP id fNDiboiXcKab for ; + Sat, 27 Apr 2013 04:53:44 -0700 (PDT) +Received: from tesseract.cs.unb.ca (tesseract.cs.unb.ca [131.202.240.238]) + (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) + (No client certificate requested) + by olra.theworths.org (Postfix) with ESMTPS id 20DCF431FAE + for ; Sat, 27 Apr 2013 04:53:44 -0700 (PDT) +Received: from fctnnbsc30w-156034082078.dhcp-dynamic.fibreop.nb.bellaliant.net + ([156.34.82.78] helo=zancas.localnet) + by tesseract.cs.unb.ca with esmtpsa + (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.80) + (envelope-from ) + id 1UW3hD-0002zs-Rp; Sat, 27 Apr 2013 08:53:40 -0300 +Received: from bremner by zancas.localnet with local (Exim 4.80) + (envelope-from ) + id 1UW3h8-00088q-4f; Sat, 27 Apr 2013 08:53:34 -0300 +From: David Bremner +To: Vladimir Marek , + Tomi Ollila +Subject: Re: [PATCH] don't store temporary value returned from c_str() +In-Reply-To: <20130427101134.GI10394@pub.cz.oracle.com> +References: <1366405933-17223-1-git-send-email-Vladimir.Marek@oracle.com> + + <20130427101134.GI10394@pub.cz.oracle.com> +User-Agent: Notmuch/0.15.2+84~g12d5e4e (http://notmuchmail.org) Emacs/24.2.1 + (x86_64-pc-linux-gnu) +Date: Sat, 27 Apr 2013 08:53:33 -0300 +Message-ID: <8738ucw5oi.fsf@zancas.localnet> +MIME-Version: 1.0 +Content-Type: text/plain +X-Spam_bar: - +Cc: notmuch@notmuchmail.org, Vladimir Marek +X-BeenThere: notmuch@notmuchmail.org +X-Mailman-Version: 2.1.13 +Precedence: list +List-Id: "Use and development of the notmuch mail system." + +List-Unsubscribe: , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: , + +X-List-Received-Date: Sat, 27 Apr 2013 11:53:46 -0000 + +Vladimir Marek writes: + +> +> const char* +> string::c_str(void) { +> char buf[100]; +> +> strcpy (buf, this->internal_representation); +> return buf; +> } + +Isn't that undefined behavior, returning a pointer to a (non-static) +local variable? + +d -- 2.26.2