Re: [Boost-users] Boost.signals with -pthread

From: Pavel Syomin (syomin_at_[hidden])
Date: 2006-09-20 06:18:20

Hi!
> I have tried your example with boost 1.33.1; gcc 4.0.1; in Mandrake 2006 
> and HP-UX 11.11; with and without threads, and it works.
> Have you tried to debug this test? If so, where is it hanging?
I think that this bug is SuSE-specific, because I can't reproduce it on 
other unices.  I run sample code with gdb and what is I see:

This GDB was configured as "i586-suse-linux"...Using host libthread_db 
library "/lib/tls/libthread_db.so.1".

(gdb) run
Starting program: /home/syomin/boost-test
[Thread debugging using libthread_db enabled]
[New Thread 1076168384 (LWP 11562)]

[There I press Ctrl+C]

Program received signal SIGINT, Interrupt.
[Switching to Thread 1076168384 (LWP 11562)]
0xffffe410 in __kernel_vsyscall ()
(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0x4013028e in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0
#2  0x4012d040 in _L_mutex_lock_34 () from /lib/tls/libpthread.so.0
#3  0x4000ce90 in _dl_runtime_resolve () from /lib/ld-linux.so.2
#4  0x0804a7e7 in scoped_lock (this=0x804c5d4, m=@0x4024d8a0)
    at lwm_pthreads.hpp:73
#5  0x0804a7e7 in scoped_lock (this=0xbfffdeb0, m=@0x804c5d4)
    at lwm_pthreads.hpp:73
#6  0x0804a74d in boost::detail::sp_counted_base::release (this=0x804c5c8)
    at shared_count.hpp:141
#7  0x0804a565 in ~shared_count (this=0xbfffdf94) at shared_count.hpp:379
#8  0x0804a14f in ~shared_ptr (this=0xbfffdf90) at connection.hpp:62
#9  0x08049443 in ~connection (this=0xbfffdf90) at connection.hpp:134
#10 0x08049061 in main () at test.cc:16