Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 28 Apr 2001 16:17:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 28 Apr 2001 16:17:20 -0400 Received: from tmhoyle.gotadsl.co.uk ([195.149.46.162]:24075 "HELO mail.cvsnt.org") by vger.kernel.org with SMTP id ; Sat, 28 Apr 2001 16:17:13 -0400 Subject: just-in-time debugging? From: Tony Hoyle To: linux-kernel@vger.kernel.org Content-Type: text/plain X-Mailer: Evolution (0.9 - Preview Release) Date: 28 Apr 2001 21:17:10 +0100 Mime-Version: 1.0 Message-Id: <20010428201708.E629E13F6A@mail.cvsnt.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Is there a way (kernel or userspace... doesn't matter) that gdb/ddd could be invoked when a program is about to dump core, or perhaps on a certain signal (that the app could deliver to itself when required). The latter case is what I need right now, as I have to debug an app that breaks seemingly randomly & I need to halt when certain assertions fail. Core dumps aren't much use as you can't resume them, otherwise I'd just force a segfault or something. I had a look at the do_coredump stuff and it looks like it could be altered to call gdb in the same way that modprobe gets called by kmod... however I don't sufficiently know the code to work out whether it'd work properly or not. A patch to glibc would perhaps be better, but I know that code even less! Something like responding to SIGTRAP would probably be ideal. Tony -- "Two weeks before due date, the programmers work 22 hour days cobbling an application from... (apparently) one programmer bashing his face into the keyboard." -- Dilbert tmh@magenta-netlogic.com http://www.nothing-on.tv - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/