[gdb][Core Dump] Keep the error state when exe file be executed

[gdb][Core Dump] Keep the error state when exe file be executed

1. Check Core Dump Status

ulimit -c

if show 0 mean no open this function



Open it by using

ulimit -c unlimited



2. Create a C file (name test.c)

#include <stdio.h>



int main(void)

{

    int *b=NULL;

    *b = 0x22;

    return 0;

}





3. gcc -g test.c

4. Execute ./a.out

Then produce a file was called core



5. Use gdb to see what happen when execute the ./a.out

gdb -c core ./a.out



Will show what happen

root@happy-laptop:/home/happy/test/test3# gdb -c core ./a.out

GNU gdb (GDB) 7.1-ubuntu

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 "i486-linux-gnu".

For bug reporting instructions, please see:

<http://www.gnu.org/software/gdb/bugs/>...

Reading symbols from /home/happy/test/test3/a.out...done.

[New Thread 3443]



warning: Can't read pathname for load map: Input/output error.

Reading symbols from /lib/tls/i686/cmov/libc.so.6...(no debugging symbols found)...done.

Loaded symbols for /lib/tls/i686/cmov/libc.so.6

Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.

Loaded symbols for /lib/ld-linux.so.2

Core was generated by `./a.out'.

Program terminated with signal 11, Segmentation fault.

#0  0x080483c4 in main () at test.c:6

6        *b = 0x22;