[Mono-devel-list] SIGILL on FreeBSD

Paolo Molaro lupus at ximian.com
Thu May 15 13:53:28 EDT 2003

On 05/14/03 Martin Dvorak wrote:
> I am finally able to pass all tests in mono/tests directory under 
> FreeBSD 5-CURRENT without gc. Everything seems to work well except for 
> compilation of mcs.exe which core dumps with illegal instruction signal. 
> The same happens in case of oldmono and mint. Unfortunately I do not 
> know mono inner-workings much yet, so I would really appreciate if 
> somebody could help me track this bug. Backtrace excerpt included.

> mono bt

You may want to do a:
	thread apply all bt
do get backtraces for all the threads.

> #0  0x283d99b7 in malloc (size=40) at /usr/src/lib/libc/stdlib/malloc.c:1102
> #1  0x283cd0b3 in calloc (num=1, size=40) at /usr/src/lib/libc/stdlib/calloc.c:58

In this case the issue seems to happen in malloc...
Two ideas: how big is the default stack space for a thread in freebsd?
Can you check it's not overflowed (print $esp is useful here)?
What processor type are you using? At least the stuff in io-layer/atomic.h
works on 486+ only, if you have a 386 that could explain a SIGILL....


lupus at debian.org                                     debian/rules
lupus at ximian.com                             Monkeys do it better

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