Training on Linux & C Debugging Techniques

/*

 * Sanfoundry.com Memory Leak Program

 * Author: Manish Kumar Bhojasia, Location: Bangalore, India

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define KB1     1024

#define MEMSIZE (4 * KB1)

char *string = "IDENTIFY 10 ISSUES IN THIS MEMLEAK PROGRAM";

char *gstring = "IDENTIFY 10 ISSUES IN THIS MEMLEAK PROGRAM";

char *gptr;

int num;

char * f1_alloc(void);

char * f2_copyme(void);

void   f3_free(char *);

main()

{

    srand((int)getpid());

    while (1) {

        gptr = f1_alloc();

        strcpy(gptr, string);

        f2_copyme();

        f3_free(gptr);

    }

}

char *f1_alloc()

{

    return (malloc(MEMSIZE));

}

char *f2_copyme()

{

    static int len, i = 0;

    char *s;

    len = strlen(string);

    s = (char *)malloc(len);

    strncpy(s, string, len);

    i++;

    if (!(i % MEMSIZE))

        printf("i=%d, %s\n", i, s);

}

void f3_free(char *p)

{

    num = rand() % 3;

    if (!num)

        free(p);

}