Chromatic <[EMAIL PROTECTED]> wrote: > (gdb) bac This is the main thread, that has suspended itself during exit processing.
> #0 0x0ff976a4 in __pthread_sigsuspend () from /lib/libpthread.so.0 ... > #3 0x0fd0a694 in exit () from /lib/libc.so.6 > (gdb) thread 2 That's the thread-manager thread. It has sent the event thread a sig_cancel signal and is now waiting on the event thread to terminate: > #1 0x0ff9c128 in waitpid () from /lib/libpthread.so.0 > #2 0x0ff958d0 in pthread_handle_exit () from /lib/libpthread.so.0 > #3 0x0ff94c90 in __pthread_manager () from /lib/libpthread.so.0 > (gdb) thread 3 And finally the event handler thread, which seems to hang in waiting for the condition. WTF it doesn't get the cancel signal, sent by the thread-manager? > #0 0x0ff976a4 in __pthread_sigsuspend () from /lib/libpthread.so.0 > #1 0x0ff973e0 in __pthread_wait_for_restart_signal () > from /lib/libpthread.so.0 > #2 0x0ff93f9c in [EMAIL PROTECTED] () from > /lib/libpthread.so.0 > #3 0x101d7614 in queue_wait (queue=0x10279e30) at src/tsq.c:159 > #4 0x1009c968 in event_thread (data=0x10279e30) at src/events.c:349 > and the fact that the attached patch seems to fix things. I don't > expect that it's correct. I don't know, why it seems to fix things. Parrot_new_terminate_event() places a "stop the run-loop" event into this interpreter's task queue. It doesn *not* effect the hanging event thread. But it seems to trigger something in an odd way, so that threads can make some progress and terminate finally. Really strange. I don't not even know, if your inserted line is executed, as it seems that exit() was called somewhere else. OTOH some lines later (interpreter.c:1143) the main thread tells the event thread to terminate by Parrot_kill_event_loop(), which pushes an event into the event queue. This also signals the waiting event thread, that something arrives, so it should wake up and finally terminate the event handler thread. I think, a better solution is to just call Parrot_exit() instead of exit(), so that Parrot_kill_event_loop() is run. leo
