2009/3/14 Neil Jerram <n...@ossau.uklinux.net> > Stanislav Ievlev <stanislav.iev...@gmail.com> writes: > > > It's very strange but I see an only one thread. full Backtrace in attach. > > That is indeed odd. Are you using GDB, and the "info threads" > command, and it lists only one thread? > > > > #0 0x00002b4ba31b4004 in __lll_lock_wait () from > /lib64/libpthread.so.0 > > > #1 0x00002b4ba31af944 in _L_lock_55 () from /lib64/libpthread.so.0 > > > #2 0x00002b4ba31af341 in pthread_mutex_lock () from /lib64/ > > libpthread.so.0 > > > #3 0x00002b4ba22f87dc in scm_i_thread_put_to_sleep () from > /usr/lib64/ > > > libguile.so.17 > > > #4 0x00002b4ba22abfd9 in scm_i_gc () from > /usr/lib64/libguile.so.17 > > > #5 0x00002b4ba22ac338 in scm_gc_for_newcell () from /usr/lib64/ > > libguile.so.17 > > > #6 0x00002b4ba22cc86f in scm_cons () from > /usr/lib64/libguile.so.17 > > This backtrace indicates the GC thread trying to lock the "heap mutex" > of all other threads (however many there are), and blocking on one of > those. > > (Or possibly the thread_admin_mutex. Can you get line numbers and > match those against your source code, to see if the relevant line in > scm_i_thread_put_to_sleep is > > scm_i_pthread_mutex_lock (&thread_admin_mutex); > > or > > scm_i_pthread_mutex_lock (&t->heap_mutex); > > ?) > > This could happen if your application has another thread that is in > Guile mode but has blocked on something - e.g. select, read, locking > another mutex. Is that possible?
Yes, it's possible. This is the our guile based system configurator ( http://git.altlinux.org/people/inger/packages/alterator.git). This program calls backends (fork/exec) that written in other languages, and communicate with them (read/write) through a simple pipe. (this is an communitation code: http://git.altlinux.org/people/inger/packages/alterator.git?p=alterator.git;a=blob;f=alterator/interfaces/guile/ensign/backend3.scm;h=501de2ac19677bf722834522e1098df92a66e7ba;hb=f0744c441a86a85eaced5ad7cb401f318941307e ) Is it possible to solve it or we'll have to use a single threaded edition of guile?
