GDB & GDB-SERVER for app debugging

Hi, try using this for debuging . Not great but better than having printfs everywhere .

/*

* debug_segfault.c

* Handy little code for debugging embedded applications where too many

* printfs on console changes program behaviour. Mighty useful if no gdb

* or other debugger support.

*# define DEBUG_SEGFAULT, register signal(SIGSEGV,(void*) sig_segv_handle)

* in main and sprinkle code with macro DEBUG_SEGFAULT_POINT

*

* Copyright © 2006 by Vishal Oliyil Kunnil

*

* This program is free software; you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation; either version 2 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program; if not, write to the Free Software

* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

*

* Original author:

* Vishal Oliyil Kunnil <vishal.ok@gmail.com>

*

*/

# define DEBUG_SEGFAULT

# include <stdio.h># include <unistd.h># include <string.h># include <signal.h>

/* Contents of below# ifdef to be globally visible */# ifdef DEBUG_SEGFAULT

char seg_file[10],seg_function[20];

int seg_line_number;

void sig_segv_handle(void) {

printf("caught SIGSEGV in\n");

printf("\tfile = %s\n", seg_file);

printf("\tfunction = %s\n", seg_function);

printf("\tapprox. line = %d\n", seg_line_number);

exit(0);

}

# define DEBUG_SEGFAULT_POINT

strcpy(seg_file, __FILE__);

strcpy(seg_function, __FUNCTION__);

seg_line_number = __LINE__; # else

# define DEBUG_SEGFAULT_POINT do { } while(0)# endif

int foo(void) {

DEBUG_SEGFAULT_POINT

return 0;

}

int bad_bad_function(void) {

char *null_pointer;

null_pointer=NULL;

DEBUG_SEGFAULT_POINT

//should segfault - de-referencing null pointer, do not try this @home!

printf("%c",*null_pointer);

return 0;

}

int main(void) {

int ret;

# ifdef DEBUG_SEGFAULT

signal(SIGSEGV,(void*) sig_segv_handle);

# endif

DEBUG_SEGFAULT_POINT

foo();

printf("zzzzz...... sleeping ....\n");

DEBUG_SEGFAULT_POINT

sleep(1);

printf("call segfaulting function....\n");

ret=bad_bad_function();

if (!ret) printf("no segfault, exiting ok....\n");

return 0;

}