.
Thread 7 (process 6207):
#0  0x00007f61dd3e1c76 in poll () from /lib/libc.so.6
#1  0x00007f61dc7cd450 in PR_Poll () from /usr/lib/libnspr4.so.0d
#2  0x00007f61db82f34e in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#3  0x00007f61db82f9d1 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#4  0x00007f61db82fc0f in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#5  0x00007f61dbf64b45 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#6  0x00007f61dbf38f65 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#7  0x00007f61dc7cbc2c in PR_Unlock () from /usr/lib/libnspr4.so.0d
#8  0x00007f61db82ff40 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#9  0x00007f61dbf64b9a in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#10 0x00007f61dbf38f65 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#11 0x00000001dbf38d93 in ?? ()
#12 0x000000000075f190 in ?? ()
#13 0x00007f61dbf64f14 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#14 0x00007f61dc7d11ca in ?? () from /usr/lib/libnspr4.so.0d
#15 0x00007f61de0193f7 in start_thread () from /lib/libpthread.so.0
#16 0x00007f61dd3eab2d in clone () from /lib/libc.so.6
#17 0x0000000000000000 in ?? ()
.
Thread 6 (process 6208):
#0  0x00007f61de01de1d in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f61dc7cae29 in ?? () from /usr/lib/libnspr4.so.0d
#2  0x00007f61dc7cba5a in PR_WaitCondVar () from /usr/lib/libnspr4.so.0d
#3  0x00007f61dbf678fa in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#4  0x00000000008382e0 in ?? ()
#5  0x0000000000000000 in ?? ()
.
Thread 5 (process 6212):
#0  0x00007f61de01db99 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f61dc7cbaec in PR_WaitCondVar () from /usr/lib/libnspr4.so.0d
#2  0x00007f61dbd78f59 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#3  0x00007f61dc7d11ca in ?? () from /usr/lib/libnspr4.so.0d
#4  0x00007f61de0193f7 in start_thread () from /lib/libpthread.so.0
#5  0x00007f61dd3eab2d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()
.
Thread 4 (process 6213):
#0  0x00007f61de01db99 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f61dc7cbaec in PR_WaitCondVar () from /usr/lib/libnspr4.so.0d
#2  0x00007f61dbd79ea8 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#3  0x0000000000000000 in ?? ()
.
Thread 3 (process 6215):
#0  0x00007f61de01db99 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f61dc7cbaec in PR_WaitCondVar () from /usr/lib/libnspr4.so.0d
#2  0x00007f61dc7cbb56 in PR_Wait () from /usr/lib/libnspr4.so.0d
#3  0x00007f61dbf63e5a in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#4  0x000000008000ffff in ?? ()
#5  0x0000000000000001 in ?? ()
#6  0x0000000000000001 in ?? ()
#7  0x00000000433740dc in ?? ()
#8  0x00007f61dbf64b73 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#9  0x00007f61dbf38f65 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#10 0x00000001dbf38d93 in ?? ()
#11 0x0000000001813010 in ?? ()
#12 0x00007f61dbf64f14 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#13 0x00007f61dc7d11ca in ?? () from /usr/lib/libnspr4.so.0d
#14 0x00007f61de0193f7 in start_thread () from /lib/libpthread.so.0
#15 0x00007f61dd3eab2d in clone () from /lib/libc.so.6
#16 0x0000000000000000 in ?? ()
.
Thread 2 (process 7882):
#0  0x00007f61de01de1d in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f61dc7cae29 in ?? () from /usr/lib/libnspr4.so.0d
#2  0x00007f61dc7cba5a in PR_WaitCondVar () from /usr/lib/libnspr4.so.0d
#3  0x00007f61db8387ab in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#4  0x00007f61db83886a in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#5  0x00007f61dc7d11ca in ?? () from /usr/lib/libnspr4.so.0d
#6  0x00007f61de0193f7 in start_thread () from /lib/libpthread.so.0
#7  0x00007f61dd3eab2d in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()
.
Thread 1 (process 6206):
#0  0x00007f61de02169b in raise () from /lib/libpthread.so.0
#1  0x00007f61db7de4b2 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#2  <signal handler called>
#3  0x0000000000000061 in ?? ()
#4  0x00007f61db8f38a5 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#5  0x00000000031c8720 in ?? ()
#6  0x00007f61db8f384c in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#7  0x0000000000000120 in ?? ()
#8  0x00000000031c8700 in ?? ()
#9  0x00000000031c8730 in ?? ()
#10 0x00000000031c8700 in ?? ()
#11 0x0000000003bc8cf0 in ?? ()
#12 0x00007fffe64494b0 in ?? ()
#13 0x0000000002cedfe0 in ?? ()
#14 0x00007f61dbfae5af in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#15 0x00007f6100000140 in ?? ()
#16 0x00007fffe6449448 in ?? ()
#17 0x00000000031c8700 in ?? ()
#18 0x0000000002b83280 in ?? ()
#19 0x00007f61db8fe151 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#20 0x00007f61dbf531f7 in ?? () from /usr/lib/xulrunner-1.9b5/libxul.so
#21 0x0000000000000000 in ?? ()