From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Odd gdb problem Date: Wed, 08 Dec 2021 01:22:57 +0100 Message-ID: <87ee6o6j32.fsf@gnus.org> References: <87tufljz7t.fsf@gnus.org> <834k7l1p9u.fsf@gnu.org> <87lf0xjyl9.fsf@gnus.org> <83r1aozim5.fsf@gnu.org> <87mtlcdujt.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="23844"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: Philipp Stephani , emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Dec 08 01:23:56 2021 Return-path: Envelope-to: ged-emacs-devel@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 1mukkW-0005zN-8v for ged-emacs-devel@m.gmane-mx.org; Wed, 08 Dec 2021 01:23:56 +0100 Original-Received: from localhost ([::1]:40646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mukkU-0002zd-Ve for ged-emacs-devel@m.gmane-mx.org; Tue, 07 Dec 2021 19:23:54 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:33120) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mukjm-00025h-2e for emacs-devel@gnu.org; Tue, 07 Dec 2021 19:23:10 -0500 Original-Received: from [2a01:4f9:2b:f0f::2] (port=45240 helo=quimby.gnus.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mukjh-0007tt-KH; Tue, 07 Dec 2021 19:23:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=y3PNt+xwwfTMLgZeP7aftmlIfurZSO3PMK6MWU+e/J8=; b=W0E1GrA2V+VS3CeFxc83S8NJMO QFYCB4Pyr/el2TK3GG/JOxmLV/oDgcSZEbI1LuQMkB/rTxfXiI/lUcFOmeN75YvXVijay47LFeJ9V oq+U169YD0TneMppk4SvIJCIzbN6PudkGqJQ+Y4YgySU+MBvNQsk63Tde+6gHcSSQkfQ=; Original-Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mukja-0003nc-57; Wed, 08 Dec 2021 01:23:03 +0100 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAgMAAAAqbBEUAAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAADFBMVEVPNjWZXVfEvb// //9Q/fqmAAAAAWJLR0QDEQxM8gAAAAd0SU1FB+UMCAAUELkAIk4AAAGXSURBVCjPPZHPatwwEMZH ix3ITQV7qfeUlrQ0fYrZkO1ZBgmaPbmwXoqfwqeedahLm5MXbFPNU/YbL+nnP+hnj0bfzBBBT4d9 sLpgMgGqJwW5KuD+D6oZMF+XqVOIiyRc0iWSxGeZd60G0GXmWhbfLsPzQmPtY/rMUR5uP1CzaWN1 b7gssgInnfj9uOVHSw4WQm+mb/zoCkulD55802z6CyAA4NI8XRzBpCPL2IstJX40WAbNpf5nfSHg 1fU8hGs9CTnMpJCWqcKH4fcZKWVpdoAlaRdksLnWsoZdTiv8ce8Ao+3Ll+7rSfsEJ4fv0k04Uk+l T1m7izDx1gCyrLpbHeVquLo55a40fEt5yDPzd+9gTl0fiTwVIRxZizMSiY5DYC3ByFqD8xQ6b7SG AQ/NcgUVTS/OJBnPK6RjYSTFj4tEDbM6ia2k/hfFZ9JJvBHPW4o3TGMR6h8/2ZEzfdbQQ91/8dpJ 1T33m3YFtc5MDcBQRXmJMm1P5hAqs/YWwoLRUWfJWrhOex0Rdup8Ws4D0uavma/a/APzo7LZSoHr TgAAACV0RVh0ZGF0ZTpjcmVhdGUAMjAyMS0xMi0wOFQwMDoyMDoxNiswMDowMI5iLK8AAAAldEVY dGRhdGU6bW9kaWZ5ADIwMjEtMTItMDhUMDA6MjA6MTYrMDA6MDD/P5QTAAAAAElFTkSuQmCC X-Now-Playing: Talking Heads's _The Name Of This Band Is Talking Heads_: "track" In-Reply-To: <87mtlcdujt.fsf@gnus.org> (Lars Ingebrigtsen's message of "Tue, 07 Dec 2021 21:33:26 +0100") X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a01:4f9:2b:f0f::2 (failed) Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:281293 Archived-At: Lars Ingebrigtsen writes: > Perhaps I should just try to bisect the current trunk -- this > started happening this past week. Done. And the culprit found at least makes some kind of sense as something that could break gdb. Philipp, after this change, I can no longer debug Emacs with gdb on Debian/bookworm. (It works fine with older gdb versions.) Do you have any idea what in particular in this change might make gdb just exit with: Program terminated with signal SIGTRAP, Trace/breakpoint trap. a60053f8368e058229721f1bf1567c2b1676b239 is the first bad commit commit a60053f8368e058229721f1bf1567c2b1676b239 Author: Philipp Stephani Date: Wed Dec 30 14:42:01 2020 +0100 Use posix_spawn if possible. posix_spawn is less error-prone than vfork + execve, and can make better use of system-specific enhancements like 'clone' on Linux. Use it if we don't need to configure a pseudoterminal. * configure.ac (HAVE_SPAWN_H, HAVE_POSIX_SPAWN) (HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR) (HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR_NP) (HAVE_POSIX_SPAWNATTR_SETFLAGS, HAVE_DECL_POSIX_SPAWN_SETSID): New configuration variables. * src/callproc.c (USABLE_POSIX_SPAWN): New configuration macro. (emacs_posix_spawn_init_actions) (emacs_posix_spawn_init_attributes, emacs_posix_spawn_init): New helper functions. (emacs_spawn): Use posix_spawn if possible. configure.ac | 17 ++++++ src/callproc.c | 189 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 205 insertions(+), 1 deletion(-) -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no