From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Kangas Newsgroups: gmane.emacs.bugs Subject: bug#9990: valgrind warning in add_row_entry Date: Mon, 17 Aug 2020 22:34:30 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="35853"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 9990@debbugs.gnu.org To: Dan Nicolaescu Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 18 00:35:24 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1k7nit-0009BE-CZ for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 18 Aug 2020 00:35:23 +0200 Original-Received: from localhost ([::1]:57526 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7nis-00075S-G2 for geb-bug-gnu-emacs@m.gmane-mx.org; 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Mon, 17 Aug 2020 15:34:30 -0700 (PDT) Original-Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Mon, 17 Aug 2020 22:34:30 +0000 In-Reply-To: (Dan Nicolaescu's message of "Tue, 08 Nov 2011 09:27:06 -0500") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:185422 Archived-At: Dan Nicolaescu writes: > valgrind ./temacs -Q gets this warning: > > ==7487== Use of uninitialised value of size 8 > ==7487== at 0x4140F4: update_window (dispnew.c:4212) > ==7487== by 0x414F32: update_window_tree (dispnew.c:3326) > ==7487== by 0x414F0E: update_window_tree (dispnew.c:3324) > ==7487== by 0x4181FD: update_frame (dispnew.c:3253) > ==7487== by 0x443EDB: redisplay_internal (xdisp.c:13175) > ==7487== by 0x4F6F47: read_char (keyboard.c:2443) > ==7487== by 0x4F9406: read_key_sequence.constprop.14 (keyboard.c:9290) > ==7487== by 0x4FB0D4: command_loop_1 (keyboard.c:1447) > ==7487== by 0x560015: internal_condition_case (eval.c:1499) > ==7487== by 0x4EE4AD: command_loop_2 (keyboard.c:1158) > ==7487== by 0x55FEF7: internal_catch (eval.c:1256) > ==7487== by 0x4EFA36: recursive_edit_1 (keyboard.c:1137) > ==7487== > ==7487== > ==7487== ---- Attach to debugger ? --- [Return/N/n/Y/y/C/c] ---- Y > > The line in question is: > > 4212 entry = row_table[i]; > > > (gdb) p i > $1 = 0x157 > (gdb) p row_table[i] > $2 = (struct row_entry *) 0x0 > (gdb) p row_table_size > $3 = 0x193 > > Is it possible for the contents of row_table to be uninitialized? Is this warning a false positive? This is a report with a number of valgrind warnings from 9 years ago. In this discussion, a number of warnings were fixed but then work unfortunately seems to have stopped. Is anyone still working on this or should this be closed? Best regards, Stefan Kangas