SIGSEGV in GC_register_finalizer_inner

[Rutger Ovidius <r_ovidius at eml dot cc>]

Hi,

When I leave my gcj (4.0.0 20041014 - linux) app running for a few
days, it eventually crashes/locks up in what looks like an infinite
loop of SIGSEGVs (I did an strace on one process that was hung). I
then ran the app under gdb twice (and waited 2 days each time) and the
cause was the same each time. Does anyone have any hints on what the
problem might be? Thanks.


--- First time:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1115769776 (LWP 8022)]
0x40523321 in GC_register_finalizer_inner () from ./lib/libgcj.so.6
(gdb) bt
#0  0x40523321 in GC_register_finalizer_inner () from ./lib/libgcj.so.6
#1  0x40523513 in GC_register_finalizer_no_order () from ./lib/libgcj.so.6
#2  0x403acf0d in _Jv_MonitorExit () from ./lib/libgcj.so.6
#3  0x081d194c in ?? ()
#4  0x081c4390 in ?? ()
#5  0x080b60aa in ?? ()
#6  0x4041d761 in java::util::Observable::notifyObservers () from ./lib/libgcj.so.6
#7  0x4041d627 in java::util::Observable::notifyObservers () from ./lib/libgcj.so.6
#8  0x080ebd88 in ?? ()
#9  0x081087b8 in ?? ()
#10 0x404288ed in java::util::Timer$Scheduler::run () from ./lib/libgcj.so.6
#11 0x403d7855 in java::lang::Thread::run () from ./lib/libgcj.so.6
#12 0x403b1c3b in _Jv_ThreadRun () from ./lib/libgcj.so.6
#13 0x40511f50 in _Jv_ThreadRegister () from ./lib/libgcj.so.6
#14 0x4052f418 in GC_start_routine () from ./lib/libgcj.so.6
#15 0x435f979c in start_thread () from /lib/tls/libpthread.so.0
#16 0x433daf2a in clone () from /lib/tls/libc.so.6

c
ctrl-c  (since it is in a loop I guess)

Program received signal SIGINT, Interrupt.
[Switching to Thread 1081245824 (LWP 8018)]
0x432e8c32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
(gdb) bt
#0  0x432e8c32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x435fe7bb in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0
#2  0x435fb976 in _L_mutex_lock_26 () from /lib/tls/libpthread.so.0
#3  0x00000000 in ?? ()
#4  0xbfffec98 in ?? ()
#5  0x4052f307 in GC_lock () from ./lib/libgcj.so.6
Previous frame identical to this frame (corrupt stack?)



--- Second time:

Program received signal SIGSEGV, Segmentation fault.
0x40523321 in GC_register_finalizer_inner () from ./lib/libgcj.so.6
(gdb) bt
#0  0x40523321 in GC_register_finalizer_inner () from ./lib/libgcj.so.6
#1  0x40523513 in GC_register_finalizer_no_order () from ./lib/libgcj.so.6
#2  0x403acf0d in _Jv_MonitorExit () from ./lib/libgcj.so.6
#3  0x081d184f in ?? ()
#4  0x081c3730 in ?? ()
#5  0x081c2e9e in ?? ()
#6  0x0810f84a in ?? ()
#7  0x08106b3a in ?? ()
#8  0x08106d99 in ?? ()
#9  0x403a10d1 in gnu::java::lang::MainThread::call_main () from ./lib/libgcj.so.6
#10 0x404404a0 in gnu::java::lang::MainThread::run () from ./lib/libgcj.so.6
#11 0x403b1c3b in _Jv_ThreadRun () from ./lib/libgcj.so.6
#12 0x40379020 in _Jv_RunMain () from ./lib/libgcj.so.6
#13 0x40379157 in JvRunMain () from ./lib/libgcj.so.6
#14 0x08059934 in ?? ()
#15 0x084bd8a0 in data_start ()
#16 0x00000001 in ?? ()
#17 0xbffff454 in ?? ()
#18 0x08202e3a in _Unwind_Find_FDE ()
#19 0x43315750 in __libc_start_main () from /lib/tls/libc.so.6
#20 0x08059871 in ?? ()

c
ctrl-c


Program received signal SIGINT, Interrupt.
0x432e8c32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
(gdb) bt
#0  0x432e8c32 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x435fe7bb in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0
#2  0x435fb976 in _L_mutex_lock_26 () from /lib/tls/libpthread.so.0
#3  0x4067d800 in vtable for gnu::gcj::runtime::SharedLibLoader () from ./lib/libgcj.so.6
#4  0xbfffed3c in ?? ()
#5  0x4052f307 in GC_lock () from ./lib/libgcj.so.6
Previous frame identical to this frame (corrupt stack?)