gdb で attach してみたらこんな所で止まってた。

----------------------------------------------------------------
[Switching to Thread 81bc07800 (LWP 100305/soffice.bin)]
0x0000000800d62d98 in wait4 () from /lib/libc.so.7
(gdb) where
#0 0x0000000800d62d98 in wait4 () from /lib/libc.so.7
#1 0x0000000800857f9d in osl_executeProcess ()
from /usr/local/lib/libreoffice/program/../ure-link/lib/libuno_sal.so.3
#2 0x00000008008321be in osl_setThreadTextEncoding ()
from /usr/local/lib/libreoffice/program/../ure-link/lib/libuno_sal.so.3
#3 0x000000080107f4a4 in pthread_create () from /lib/libthr.so.3
#4 0x00007fffff1fa000 in ?? ()
Error accessing memory address 0x7fffff3fa000: 無効なアドレスです.
------------------------------------------------------------------

うーむ。/lib/libc.so.7 に原因があるのか？