From owner-freebsd-hackers Wed Dec 5 10:12:11 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from smtpproxy2.mitre.org (smtpproxy2.mitre.org [128.29.154.90]) by hub.freebsd.org (Postfix) with ESMTP id 9D3F537B419 for ; Wed, 5 Dec 2001 10:12:08 -0800 (PST) Received: from avsrv2.mitre.org (avsrv2.mitre.org [128.29.154.4]) by smtpproxy2.mitre.org (8.11.3/8.11.3) with ESMTP id fB5IC5c24990 for ; Wed, 5 Dec 2001 13:12:05 -0500 (EST) Received: from MAILHUB1 (mailhub1.mitre.org [129.83.20.31]) by smtpsrv1.mitre.org (8.11.3/8.11.3) with ESMTP id fB5IC3s17516 for ; Wed, 5 Dec 2001 13:12:04 -0500 (EST) Received: from dhcp-48-37.mitre.org (128.29.48.37) by mailhub1.mitre.org with SMTP id 8475364; Wed, 05 Dec 2001 13:11:51 -0500 Message-ID: <3C0E641B.F65BAC6@mitre.org> Date: Wed, 05 Dec 2001 13:14:51 -0500 From: "PSI, Mike Smith" Organization: The MITRE Corporation X-Mailer: Mozilla 4.76 [en]C-20010313M (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: hackers@freebsd.org Subject: Tracking down system freeze Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi all. Does anyone have ANY suggestions on how to determine where the kernel/program is when the system freezes??? Even hardware solutions, such as the infamous paperclip across two pins will do. I am trying to track down what appears to be a kernel freeze problem, but alas, debuggers, et.al. are worthless because they too are frozen. It appears to be one of those difficult problems where part A is doing something wrong (which it doesn't mind) but later unrelated part B is being blasted by it. And of course, while it happens often, it doesn't happen every time. But I can't tell where we are when the system freezes. Is there any way to kick the system in the butt somehow to at least let the debugger do it's thing? On the same line, can anyone tell me where I can find out everything a program does when executed BEFORE the first line of code is reached (gcc). not THE Mike Smith To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message