Hi Johannes, i am trying around with pool and xsample using valgrind but the only violation i could provoke is on quitting PD which is unimportant (but shortly fixed nevertheless).
I've had a few reports concerning strange effects with flext-based externals (e.g. vanishing pool), and all of them have been on debian-unstable. When i get the chance to debug on such a machine, i'll research further but on my gentoo installation everything is running smooth at the moment.
If you could use the debug version of pool (built with "flext/build.sh pd gcc build-debug-single") and run pd with valgrind, some helpful information could probably be gathered.
many thanks, Thomas
Johannes Burström wrote:
Hi
after updating my debian installation (including 1ibc6) i suddenly started to have problems with pool. i have narrowed it down to this: closing pd after invoking [pool] in a patch, IF the xsample library is loaded, makes pd crash with the following message:
*** glibc detected *** double free or corruption (fasttop): 0x082d8ea8 ***
Sometimes this happens when just deleting an abstraction containing [pool]. I haven't been able to find a way to reproduce this, however.
the bt of gdb shows this:
0x40417861 in kill () from /lib/libc.so.6 (gdb) bt #0 0x40417861 in kill () from /lib/libc.so.6 #1 0x402b4309 in pthread_kill () from /lib/libpthread.so.0 #2 0x402b46c0 in raise () from /lib/libpthread.so.0 #3 0x40417616 in raise () from /lib/libc.so.6 #4 0x40418981 in abort () from /lib/libc.so.6 #5 0x4044a960 in __fsetlocking () from /lib/libc.so.6 #6 0x404502e9 in malloc_usable_size () from /lib/libc.so.6 #7 0x40450d81 in free () from /lib/libc.so.6 #8 0x4061e9d8 in flext_root_single::operator delete () from /usr/local/lib/pd/extra/xsample.pd_linux #9 0x4061bfaf in flext_base_single::AddOutlets () from /usr/local/lib/pd/extra/xsample.pd_linux #10 0x40419ade in exit () from /lib/libc.so.6 #11 0x4040441b in __libc_start_main () from /lib/libc.so.6 #12 0x08059261 in _start () at ../sysdeps/i386/elf/start.S:119
this is on devel 0_39, checked out today, and a recent (i believe yesterday) flext checkout, all compiled today.
If related somehow, the libc6 is 2.3.5-7, from unstable, the testing 2.3.5-6 had the same problem, while i didn't have this issue with 2.3.2.ds1-22 (_if_ it's related - if this will continue i guess i'll try to downgrade to see if it disappears).
i'd be grateful if anyone had any clues on how to solve this.
Johannes
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