SIGBUS that doesn't go away even after application restart, only after reboot

AJ ONeal coolaj86 at
Mon Dec 20 12:26:42 MST 2010

I've got an application which runs for several hours in the same loop
correctly and then exits with SIGBUS.

If I try to start the application again it immediately exits with SIGBUS and
will not work until rebooted.
If I reboot the system it runs for several hours again.

gdb reports
Program received signal SIGBUS, Bus error.
 0x401bd354 in memcpy () from /lib/
(gdb) bt
#0  0x401bd354 in memcpy () from /lib/
#1  0x0000929c in capture_file_write ()
#2  0x0fefeb0a in ?? ()
#3  0x0fefeb0a in ?? ()

Any ideas on what causes this error?
How do I go about finding what #2 and #3 are?

This is the application flow:

count = 0 # this is %d
    outfile = /dev/shm/output.%d.dat
    data = read logged.dat for 512kb
    unlink outfile if exists
    truncate outfile to 512kb
    outfile_p = mmap outfile
    memcpy data outfile_p
    count += 1
    if count > MAX; count = 0
    advance or rewind logged.dat

AJ ONeal

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