An example program that used to demonstrate how to use GDB/LLDB and Valgrind with the tutorial at http://www.afnan.io/debugging-c-with-gdb-and-valgrind/

gdb_valgrind_example.c

/* gdb_valgrind_example.c    Afnan Enayet
 *
 * An example designed to help a user understand how to
 * use GDB/LLDB and Valgrind
 *
 * Functions:
 *   - init_str: a functions that initializes a string 
 *     to "hello"
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/****** Function prototypes ******/

static void init_str(char *str);

/****** Function definitions *****/

/* Initializes and creates a string that says "hello"
*/
static void init_str(char *str)
{
    str = malloc(5);
    strcpy(str, "hello");
}

int main(void)
{
    // Allocating a string with the literal "hello"
    char *str = NULL;
    printf("This next string should be blank...\n");
    init_str(str);
    printf("%s\n", str);
    return 0;
}