While I was running atg with Mustang b44 in a sunfire
a machine, it crashed after 18 hours.

hostname: jtg-sunfire-3.sfbay.sun.com
uname -a
> SunOS jtg-sunfire-3 5.10 Generic_Patch i86pc i386 i86pc
cat /etc/release
> Solaris 10 7/05 s10x_u1wos_06 X86
# isainfo -v
64-bit amd64 applications
        sse2 sse fxsr amd_3dnowx amd_3dnow amd_mmx mmx cmov amd_sysc cx8 tsc
        fpu
32-bit i386 applications
        sse2 sse fxsr amd_3dnowx amd_3dnow amd_mmx mmx cmov amd_sysc cx8 tsc
        fpu

Flag used:
 /usr/j2se/bin/java -d64 -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled

/usr/j2se/bin/java -version
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b44)
Java HotSpot(TM) Server VM (build 1.6.0-ea-b44, mixed mode)

Log file location: -------------------
bash-3.00# tail /bt/atgrun.12869.-d64/run.atg.out
Unexpected Error
------------------------------------------------------------------------------
SIGSEGV (0xb) at pc=0xfffffd7ffed10aba, pid=19651, tid=1

Do you want to debug the problem?

To debug, run 'dbx - 19651'; then switch to thread 1
Enter 'yes' to launch dbx automatically (PATH must include dbx)
Otherwise, press RETURN to abort...

Stack Trace:
-----------------
(dbx) where t@1
current thread: t@1
=>[1] ___nanosleep(0xfffffd7fffdfdc10, 0xfffffd7fffdfdc00,
0xfffffd7fff32b49c, 0xfffffd7fff33ad1a, 0x0, 0x4f), at
0xfffffd7fff339fda
 [2] _sleep(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0xfffffd7fff32b4b0
 [3] os::message_box(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffee70c73
 [4] VMError::show_message_box(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffef04284
 [5] VMError::report_and_die(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffef03cc7
 [6] JVM_handle_solaris_signal(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeac1fdc
 [7] signalHandler(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0xfffffd7ffeac2290
 [8] __sighndlr(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0xfffffd7fff337ff6
 [9] call_user_handler(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7fff32d482
 [10] sigacthandler(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7fff32d668
 ---- called from signal handler with signal 11 (SIGSEGV) ------
 [11] java_lang_Thread::thread_id(0x0, 0x5b6590, 0x1, 0x1, 0x88,
0x42ee00), at 0xfffffd7ffed10aba
 [12] ObjectMonitor::enter2(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeb49b45
 [13] ObjectMonitor::enter(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeaa70f8
 [14] ObjectSynchronizer::slow_enter(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeaa5323
 [15] ObjectSynchronizer::fast_enter(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeec67e0
 [16] instanceRefKlass::acquire_pending_list_lock(0x0, 0x0, 0x0, 0x0,
0x0, 0x0), at 0xfffffd7ffeaea450
 [17] VM_GC_Operation::acquire_pending_list_lock(0x0, 0x0, 0x0, 0x0,
0x0, 0x0), at 0xfffffd7ffeaea4b3
 [18] VM_GC_Operation::doit_prologue(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffef04442
 [19] VMThread::execute(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeaea1bf
 [20] GenCollectorPolicy::mem_allocate_work(0x0, 0x0, 0x0, 0x0, 0x0,
0x0), at 0xfffffd7ffeca763c
 [21] GenCollectedHeap::mem_allocate(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffece6166
 [22] CollectedHeap::common_mem_allocate_noinit(0x0, 0x0, 0x0, 0x0,
0x0, 0x0), at 0xfffffd7ffec65aa3
 [23] CollectedHeap::obj_allocate(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffea612d9
 [24] instanceKlass::allocate_instance(0x0, 0x0, 0x0, 0x0, 0x0, 0x0),
at 0xfffffd7ffea61482
 [25] JavaThread::allocate_threadObj(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffeed1dfa
 [26] attach_current_thread(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffed307b3
 [27] jni_AttachCurrentThread(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffed30956
 [28] jni_DestroyJavaVM(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at
0xfffffd7ffed30482
 [29] main(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0x40445d