signal 11 after kernel update r247742 -> r248706

[René Ladan]

On 04-04-2013 16:46, René Ladan wrote:
> On 04-04-2013 15:20, René Ladan wrote:
>> On 29-03-2013 18:58, Adrian Chadd wrote:
>>> On 29 March 2013 09:06, René Ladan <rene at freebsd.org
>>> <mailto:rene at freebsd.org>> wrote:
>>>  
>>>
>>>     >> I'm at r248509 on my rpi and everything is good; maybe that'll help
>>>     >> narrow the binary search.
>>>     > Ok, I'll start looking from there.
>>>
>>>     The 'skeleton' unmapped IO commit was r248508, so that one is OK.
>>>     There seem to be some unmapped IO changes between r248509 and r248706,
>>>     (e.g. r248510-r248512, r248514-r248522, r248550, r248568-r248569,
>>>     r248596) but I think it is more related to something closer to
>>>     userland?
>>>
>>>     But the other commits between r248508 and r248706 look OK to me
>>>     (including r248534 (jilles, SOCK_CLOEXEC, SOCK_NONLBOCK,
>>>     MSG_CMSG_CLOEXEC))
>>>
>>>
>>> Are you able to continue bisecting those changes?
>>>
>>> Thanks for your help so far!
>>>
>> Checkpoint: r248509 boots fine (including init), but running e.g. python
>> built under r247742 dumps core during startup.
>> kdump output: ftp://rene-ladan.nl/pub/freebsd/python2.7.ktrace
>>
> Maybe it has to do with the fix applied to libsupc++ in r248624 to get
> this program working:
> 
> % cat testcpp.cc
> #include <iostream>
> 
> using namespace std;
> 
> int main(void) {
> 	try {
> 		throw "throwme";
> 	}
> 	catch (const char* msg) {
> 		cout << msg << endl;
> 	}
> 
> 	return 0;
> }
> 
> With an older libsupc++ , one gets:
> % /home/pi/testcpp
> /usr/lib/libsupc++.so.1: Undefined symbol "_Unwind_RaiseException"
> %
>
I just upgraded to r248706 again and it boots fine. The difference with
the earlier upgrade is that I now cross-install kernel and world so that
the architecture is compatible with the cross-build architecture. I used
a native 'make installkernel' / 'make installworld' upgrade earlier
which required some ad-hoc install hacks.

testcpp runs fine again with the libsupc++ fix:
% /home/pi/testcpp
throwme
%

python still dumps core, maybe it needs to be forcibly rebuilt?

I'll upgrade to todays CURRENT to see how that behaves.

René