[DragonFlyBSD - Bug #2524] vkernel{32,64} DDB traces not working

["Antonio M. Huete Jimenez via Redmine" <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>]

Issue #2524 has been reported by tuxillo.

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Bug #2524: vkernel{32,64} DDB traces not working
http://bugs.dragonflybsd.org/issues/2524

Author: tuxillo
Status: New
Priority: High
Assignee: 
Category: 
Target version: 


Hi,

DDB traces do not work when vkernels are compiled with gcc47.
To trigger it, just boot a vkernel built with gcc47 and 'sysctl debug.panic=1' or 'sysctl debug.panic2=1'

vkernel64 it will either SIGILL or print just fail to find any stack frame:

0x8033d56590 does not look like a stack frame, skipping
0x8033d56598 does not look like a stack frame, skipping
Unable to find anything that looks like a stack frame
Debugger("panic")

vkernel32 will simply SIGILL (100% times I've tested it).

vkernels built with gcc44 don't show this behaviour.

Cheers,
Antonio Huete



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