// File: leaky.c
//
// This is the checker.c  from ``Linux Programming'' by Mathew and Stones
// 
// The code mallocs a buffer and then reads and writes beyond the end
// of the buffer memory. The buffer is lost and not free.
// valgrind can catch all of these errors and pinpoint the line
// in the source code where they occur.
//
// How do I find a line number in my code?
//
// You can use a emacs short cut to goto line e.g., 20 in your code
// Hold down the ESC key then hit the X key followed by the G key then 20
// then CR [carriage return]. You will be brought to line 20. This is
// handy when gcc or valgrind or any tool for that matter tells you
// there is a problem at a particular line. 
//


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

int main()
{
    char *ptr = (char *) malloc(1024);
    char ch;

    /* Uninitialized read */
    ch = ptr[1024];

    /* Write beyond the block */
    ptr[1024] = 0;

    /* Orphan the block */
    ptr = 0;
    exit(0);
}