Date: Mon, 03 Dec 2007 20:13:33 -0800 From: Julian Elischer <julian@ironport.com> To: FreeBSD Current <current@freebsd.org> Subject: remote gdb failures in recent builds (last 6 months or so.) Message-ID: <4754D3ED.3060200@ironport.com>
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This is a multi-part message in MIME format. --------------010309050009000007020103 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Here's a trace of kgdb attempting to sync with a kernel over the serial port.. ---> "+" ---> "$Hc-1#09" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$Hc-1#09" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$Hc-1#09" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$Hc-1#09" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "-" <--- "$T058:e3375ac0;thread:186c5;#b5$" ---> "+" ---> "$qC#b4" <--- "T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$qC#b4" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$qC#b4" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$qC#b4" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "-" <--- "$T058:e3375ac0;thread:186c5;#b5$" ---> "+" ---> "$qOffsets#4b" <--- "T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$qOffsets#4b" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$qOffsets#4b" <--- "$T058:e3375ac0;thread:186c5;#b5$T058:e3375ac0;thread:186c5;#b5" ---> "$qOffsets#4b" ---> "-" <--- "$T058:e3375ac0;thread:186c5;#b5$" ---> "+" "Couldn't establish connection to remote target " "Malformed response to offset query, T058:e3375ac0;thread:186c5;" note that: 1/ gdb CAN read the damned data.. this is obtained from ktrace. 2/ it prints out the packet in the error message. 3/ teh kernel is sending each message twice, in pairs. 4/ after kgdb finally sends a '-' (NAK) teh kernel sends ONE MORE which seems to be accepted Anyone have any clues? ~ --------------010309050009000007020103--
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