From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: William Xu Newsgroups: gmane.emacs.help Subject: Re: gdb mode with gdb command from the docker Date: Tue, 20 Oct 2020 21:54:55 +0200 Organization: the Church of Emacs Message-ID: References: <83sgabr0h6.fsf@gnu.org> <83a6wjqt58.fsf@gnu.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="19704"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (darwin) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:ZWkNk4BQbVXPsNZd4E33Ssq1t3g= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Oct 20 21:55:54 2020 Return-path: Envelope-to: geh-help-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 1kUxjd-00052y-W3 for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 20 Oct 2020 21:55:53 +0200 Original-Received: from localhost ([::1]:33896 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kUxjd-0000qA-1g for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 20 Oct 2020 15:55:53 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46652) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kUxiv-0000gB-1z for help-gnu-emacs@gnu.org; Tue, 20 Oct 2020 15:55:09 -0400 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:59380 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kUxit-0003CB-Jo for help-gnu-emacs@gnu.org; Tue, 20 Oct 2020 15:55:08 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kUxin-0003yE-R5 for help-gnu-emacs@gnu.org; Tue, 20 Oct 2020 21:55:01 +0200 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/20 15:05:02 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: 5 X-Spam_score: 0.5 X-Spam_bar: / X-Spam_report: (0.5 / 5.0 requ) BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, NML_ADSP_CUSTOM_MED=0.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:124598 Archived-At: Eli Zaretskii writes: >> Also as I mentioned, if I run the gdbWrapper directly outside emacs, on >> the terminal app (i'm running Terminal on macOS), there is no problem >> seen at all. > > Of course: when the program is run from GDB under Emacs, the standard > output and standard input of the program are connected to a PTY > (pseudo-terminal), not to a real console device. So it is a small > wonder that the behavior is different. > >> I think it is more likely something wrong inside emacs's >> gdb mode. > > Maybe so, but I don't see what would cause this in gdb mode. I manage to make it work by disabling the gdb "-inferior-tty-set" command in gdb-inferior-io--init-proc. It seems that the problem is that, process.c::allocate_pty allocates a pseudo-terminal for the *host*, I can find the same tty name in /dev on the host. It then confuses the gdb command from the docker container. Is there any reason to call "-inferior-tty-set" commands here? Can we simply remove it? ---------------------------------8<------------------------------------- $ git diff diff --git a/lisp/progmodes/gdb-mi.el b/lisp/progmodes/gdb-mi.el index e785acd284..63dae4b248 100644 --- a/lisp/progmodes/gdb-mi.el +++ b/lisp/progmodes/gdb-mi.el @@ -1590,12 +1590,13 @@ gdb-inferior-io--init-proc (set-process-filter proc 'gdb-inferior-filter) (set-process-sentinel proc 'gdb-inferior-io-sentinel) ;; The process can run on a remote host. - (let ((tty (or (process-get proc 'remote-tty) - (process-tty-name proc)))) - (unless (or (null tty) - (string= tty "")) - (gdb-input - (concat "-inferior-tty-set " tty) 'ignore)))) + ;; (let ((tty (or (process-get proc 'remote-tty) + ;; (process-tty-name proc)))) + ;; (unless (or (null tty) + ;; (string= tty "")) + ;; (gdb-input + ;; (concat "-inferior-tty-set " tty) 'ignore))) + ) (defun gdb-inferior-io-sentinel (proc _str) (when (eq (process-status proc) 'failed) ---------------------------------8<------------------------------------- -- William