> >> Could you attach a debugger and look, where it hangs?
>
> > nick_vm: {93} gdb ./parrot
>
> Please try this:
>
> $ parrot hangs.pasm
>
> [ second console ]
> $ ps axw | grep [p]arrot
> $ gdb parrot <the_pid>
> gdb> thread 1
> gdb> bac
> gdb> thread 2
But gdb on NetBSD don't support threads.
nick_vm: {10} gdb parrot 226
GNU gdb 5.0nb1
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This GDB was configured as "i386--netbsdelf"...
/usr/home/nick/parrotcode/parrot/226: No such file or directory.
Attaching to program: /usr/home/nick/parrotcode/parrot/parrot, process 226
Reading symbols from /usr/libexec/ld.elf_so...done.
Loaded symbols for /usr/libexec/ld.elf_so
Reading symbols from /usr/lib/libm387.so.0...done.
Loaded symbols for /usr/lib/libm387.so.0
Reading symbols from /usr/lib/libm.so.0...done.
Loaded symbols for /usr/lib/libm.so.0
Reading symbols from /usr/lib/libcrypt.so.0...done.
Loaded symbols for /usr/lib/libcrypt.so.0
Reading symbols from /usr/pkg/lib/libpthread.so.20...done.
Loaded symbols for /usr/pkg/lib/libpthread.so.20
Reading symbols from /usr/lib/libc.so.12...done.
Loaded symbols for /usr/lib/libc.so.12
0x48281d6f in select () from /usr/lib/libc.so.12
(gdb) thread 1
Thread ID 1 not known. Use the "info threads" command to
see the IDs of currently known threads.
(gdb) bac
#0 0x48281d6f in select () from /usr/lib/libc.so.12
#1 0x4823996c in __pth_sc_select () from /usr/pkg/lib/libpthread.so.20
#2 0x48232c77 in __pth_sched_eventmanager ()
from /usr/pkg/lib/libpthread.so.20
#3 0x48232277 in __pth_scheduler () from /usr/pkg/lib/libpthread.so.20
#4 0x48233e64 in pth_spawn_trampoline () from /usr/pkg/lib/libpthread.so.20
#5 0x482313ad in pth_mctx_set_bootstrap () from
/usr/pkg/lib/libpthread.so.20
#6 0x48231321 in pth_mctx_set_trampoline () from
/usr/pkg/lib/libpthread.so.20
#7 0x8272fa0 in ?? ()
#8 0x1f in ?? ()
Error accessing memory address 0x1f: Invalid argument.
(gdb) thread 2
Thread ID 2 not known. Use the "info threads" command to
see the IDs of currently known threads.
(gdb) info threads
(gdb)
>
> > Probably select have been called without timeout.
>
> Yes that's true. But the event thread wakes up the io_thread (s.
> stop_io_thread). This seems to fail with PTH as it doesn't preempt.
>
> Looking at the code, this seems to happen, when a thread is created and
> never started. The main interpreter tries to join that thread
> nethertheless. I've set another flag which should cure this flaw.
Another question.
Do enable link with PTH into config/init/hints/netbsd.pl for NetBSD 1.x
always or only in the presence PTH, or to build without threads by default?
Nick.
