[chuck-dev] segfaults galore

[Ge Wang]

Hi Niklas!

Hmm... I tried this on os x and couldn't seg fault.
Did you do a clean build?  does it happen consistently?

it is suspicious that GDB points to getconcurrency()...
shreds do not use pthreads (obviously, ha).
it could be a synchronization bug in the server code
and the VM.

Ge!

On Jul 26, 2004, at 7:56 PM, Niklas Werner wrote:

> Hi all,
>
> I tried to run chuck (cvs from just an hour ago) in --loop mode. I can
> then add shreds, but if I try to remove one, chuck crashes:
>
> chuck --srate44100 --loop
> [chuck](VM): sporking incoming shred: 1...
> [chuck](VM): sporking incoming shred: 2...
> Segmentation fault
>
>
> the commands leading to this were:
>
> nick at detritus ~/build/chuck_dev/examples $ chuck + moe.ck
> nick at detritus ~/build/chuck_dev/examples $ chuck + larry.ck
> nick at detritus ~/build/chuck_dev/examples $ chuck - 2
>
> (gdb) r --srate44100 --loop
> Starting program: /usr/bin/chuck --srate44100 --loop
> warning: Unable to find dynamic linker breakpoint function.
> GDB will be unable to debug shared library initializers
> and track explicitly loaded dynamic code.
>
> Program received signal SIG32, Real-time event 32.
> 0x0fc292f4 in pthread_getconcurrency () from /lib/libpthread.so.0
> (gdb) c
> Continuing.
>
> Program received signal SIG32, Real-time event 32.
> 0x0fc292f4 in pthread_getconcurrency () from /lib/libpthread.so.0
> (gdb) c
> Continuing.
> [chuck](VM): sporking incoming shred: 1...
> [chuck](VM): sporking incoming shred: 2...
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0fef277c in mallopt () from /lib/libc.so.6
> (gdb) bt
> #0  0x0fef277c in mallopt () from /lib/libc.so.6
> #1  0x0ffbc5ec in ?? () from /lib/libc.so.6
> (gdb)
>
>
> hmmm, is there a double call to free() going on or anything similar?
>
> (Oh, and gentoo on Powerbook Aluminium)
>
> Cheers,
>
> Niklas
> --
> Computer Music PhD-student
> University of Waikato
> Hamilton
> New Zealand
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