[mythtv] mythtv and AddressSanitizer?

[Mark Spieth]

On 12/10/18 09:50, Peter Bennett wrote:
>
>
> On 10/11/2018 06:36 PM, faginbagin wrote:
>> Has anyone tried to enable AddressSanitizer compilation of mythtv?
>>
>> Would the right approach be to add -fsanitize=address to CFLAGS and/or
>> LDFLAGS?
>>
>> I see configure has been modified to handle some ffmpeg toolchain-asan
>> options. Will that cause conflicts?
>>
>> Any other gotchas?
>>
>> I ask because I'm getting core dumps on a 32 bit laptop and the core
>> dumps aren't helpful. My plan is to install a 32 bit distro on a 64 bit
>> machine and test there.
>>
>> TIA
>>
>
> I don't know about address sanitizer, but I may be able top help with 
> the core dumps.
>
There shouldn't be any problem. May cause a slight performance hit but 
thats all. Normally I would only do this in unit tests but if it helps 
catch issues then do it. I have not tried this so YMMV.

Also ulimit -c unlimited to dump core on segfault and then post analyse.
or even gcore to dump the core of a running process to look for deadlocks.
You probably know these tricks.

If the coredumps arent helpful -fsanitize=address may also not help 
since the stack is probably corrupted.

Mark