GDB: GDB is a tool for debug the c program.
Here is test.c source code.
#include <stdio.h>
int main(){
int i;
for (i = 0; i < 1000; ++i)
printf("i = %d\n", i);
printf("Hello world!\n");
return 0;
}
follow the commands:
1. $gcc -g test.c -o test
2.$gdb test
Here is the message for gdb, eg:
GNU gdb (GDB) Red Hat Enterprise Linux (7.1-28.el6)
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 "i686-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/zab08/Desktop/Linux/gdb/test...done.
(gdb)
3.(gdb)break main
Breakpoint 1 at 0x80483fd: file test.c, line 5.
4.(gdb)run
Breakpoint 1, main () at test.c:5
5 for(i = 0; i < 10000; ++i)
5.(gdb)n
7 printf("i = %d\n", i);
6.(gdb)c
......(to much)
we have 6 commands in the example.
1. $gcc -g test.c -o test
means compling the test.c by gdb style to the exeute file named test.
2.$gdb test
means use gdb to debug the test.
3.(gdb)break main
means make a break point on the main function. (ps: (gdb) means we use gdb commands here)
4.(gdb)run
means run the program.
5.(gdb)n
means execute program execute one step.
6.(gdb)c
means continue execute the progream util stop.
a short tutorial for gdb, more detail use google please, have fun and enjoy it!