From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15403 invoked by alias); 12 Apr 2012 21:57:58 -0000 Received: (qmail 15393 invoked by uid 22791); 12 Apr 2012 21:57:58 -0000 X-SWARE-Spam-Status: No, hits=-3.5 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 12 Apr 2012 21:57:46 +0000 From: "xinliangli at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/52955] New: Missing warning on wrong sizeof usage Date: Thu, 12 Apr 2012 21:57:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: xinliangli at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-04/txt/msg00917.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52955 Bug #: 52955 Summary: Missing warning on wrong sizeof usage Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: xinliangli@gmail.com Example: #include struct S { int a, b, c; float vec[16]; }; void test(S *s) { // ... memset(s, 0, sizeof(s)); // ... } /* memset.cpp:5:23: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [- Wsizeof-pointer-memaccess] memset(s, 0, sizeof(s)); ~ ^ 1 warning generated. */