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port-arm/47078: endless stack trace in gdb.



>Number:         47078
>Category:       port-arm
>Synopsis:       endless stack trace in gdb.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 14 20:30:06 +0000 2012
>Originator:     SAITOH Masanobu
>Release:        netbsd-6
>Organization:
>Environment:
        evbarm (and other arm ports)
        netbsd-6 and current
Architecture: arm
Machine: evbarm
>Description:
        While running /usr/test/atf/fs/vfs/t_renamerace, program die
        and dumps core. While dumping the stack trace by gdb, it loops
        forever.

        e.g.:

tc-start: 1350245565.206610, msdosfs_renamerace_dirs
tc-so:panic: rename: lost dir entry
tc-so:rump kernel halting...
tc-so:halted
tc-se:Test program crashed; attempting to get stack trace <=== stop at here.

        (login remotely and kill the gdb process)
# ps -auxw |grep gdb
root    4620 87.7  2.1 14780 10788 pts/0 R+    5:12AM  8:50.65 gdb -batch -q 
-ex bt t_renamerace /tmp/atf-run.03959k/t_renamerace.cor
root    3847  0.0  0.0     0     0 pts/1 R+         -  0:00.00 grep gdb (sh)
# kill 4620

        (and then)
tc-se:[New process 20]
tc-se:[New process 19]
tc-se:[New process 18]
tc-se:[New process 17]
tc-se:[New process 16]
tc-se:[New process 15]
tc-se:[New process 14]
tc-se:[New process 13]
tc-se:[New process 12]
tc-se:[New process 11]
tc-se:[New process 10]
tc-se:[New process 9]
tc-se:[New process 8]
tc-se:[New process 7]
tc-se:[New process 6]
tc-se:[New process 5]
tc-se:[New process 4]
tc-se:[New process 3]
tc-se:[New process 2]
tc-se:[New process 1]
tc-se:Core was generated by `t_renamerace'.
tc-se:Program terminated with signal 6, Aborted.
tc-se:#0  0x205d3024 in _lwp_kill () from /usr/lib/libc.so.12
tc-se:#0  0x205d3024 in _lwp_kill () from /usr/lib/libc.so.12
tc-se:#1  0x205d20d4 in abort () from /usr/lib/libc.so.12
tc-se:#2  0x204394dc in rumpuser_exit () from /usr/lib/librumpuser.so.0
tc-se:#3  0x203f8e3c in rumpns_cpu_reboot () from /usr/lib/librump.so.0
tc-se:#4  0x203c8f0c in rumpns_vpanic () from /usr/lib/librump.so.0
tc-se:#5  0x203c9024 in rumpns_panic () from /usr/lib/librump.so.0
tc-se:#6  0x2010073c in rumpns_msdosfs_rename () from 
/usr/lib/librumpfs_msdos.so.0
tc-se:#7  0x203bd838 in rumpns_VOP_RENAME () from /usr/lib/librump.so.0
tc-se:#8  0x20342640 in rumpns_do_sys_rename () from /usr/lib/librumpvfs.so.0
tc-se:#9  0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#10 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#11 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#12 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#13 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#14 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#15 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#16 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#17 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#18 0x203f0008 in ?? () from /usr/lib/librump.so.0
        (snip)
tc-se:#951 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#952 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:#953 0x203f0008 in ?? () from /usr/lib/librump.so.0
tc-se:Stack trace complete         <= by killing the gdb process.

>How-To-Repeat:
        see above
>Fix:
        I don't know.



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