配置core文件生成

# ulimit -c unlimited
# echo "/var/core-%e-%p-%t" > /proc/sys/kernel/core_pattern
# cat /proc/sys/kernel/core_pattern
/var/core-%e-%p-%t

生成的core

# ls /var/core-dump-1063-991181935 

core分析

# arm-none-linux-gnueabi-gdb a.out
GNU gdb (Sourcery G++ Lite 2011.03-41) 7.2.50.20100908-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-none-linux-gnueabi".
For bug reporting instructions, please see:
<https://support.codesourcery.com/GNUToolchain/>...
Reading symbols from /mnt/hgfs/build/a.out...done.
(gdb) 
(gdb) set solib-search-path /home/rootfs/lib
(gdb) info sharedlibrary 
From        To          Syms Read   Shared Object Library
0x401d501c  0x401e6f64  Yes (*)     /home/rootfs/lib/libgcc_s.so.1
0x40206c00  0x402ffb5c  Yes (*)     /home/rootfs/lib/libc.so.6
0x4007e7d0  0x40098f58  Yes (*)     /home/rootfs/lib/ld-linux.so.3
(*): Shared library is missing debugging information.
(gdb) core-file /home/core-dump-1063-991181935 
warning: exec file is newer than core file.
[New LWP 1063]
Reading symbols from /home/rootfs/lib/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /home/rootfs/lib/libgcc_s.so.1
Reading symbols from /home/rootfs/lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /home/rootfs/lib/libc.so.6
Reading symbols from /home/rootfs/lib/ld-linux.so.3...(no debugging symbols found)...done.
Loaded symbols for /home/rootfs/lib/ld-linux.so.3
Core was generated by `./dump'.
Program terminated with signal 11, Segmentation fault.
#0  0x4026e854 in memcpy () from /home/rootfs/lib/libc.so.6
(gdb)