source: libcfa/src/memcheck.awk @ 67b421c

#!/usr/bin/nawk -f

BEGIN {
        print "Freed but not allocated:"
}

/malloc/ {
        alloc[ $2 ] = $3;
}

/free/ {
        if ( $2 in alloc ) {
                delete alloc[ $2 ];
        } else {
                print $2;
        } # if
}

END {
        print "Allocated but not freed:"
        for ( i in alloc ) {
                print i, alloc[ i ];
                total += alloc[ i ]
        } # for
        print "total", total;
}