CareerCup

I found code in stackoverflow site

static unsigned char our_memory[1024 * 1024]; //reserve 1 MB for malloc
static size_t next_index = 0;

void *malloc(size_t sz)
{
    void *mem;

    if(sizeof our_memory - next_index < sz)
        return NULL;

    mem = &our_memory[next_index];
    next_index += sz;
    return mem;
}

void free(void *mem)
{
   //we cheat, and don't free anything.
}

1) Give a very large size(1000000000) and check if its able to allocate
2) Provide number values 1,3,0,100
3) Give a character in size to api
4) GIve blank spaces
5) NUll value for size field in api
6) Call the api from multiple sessions

1.Enter characters
2. Try for null values
3.TRy for blank spaces
4.TRy with very large size
5. Enter combination of chars & numbers

First of all.. How did U get calls from org like Apple.. Damn Lucky...

Now ,Here we go my approach..

1> First we will assume that the memory is a fixed set of array(Coz its address is continious)
2> Now we can use the same malloc signature. i.e. size to allocate and return if it is possible or not.
void * mymalloc(int size)
{
/* Consume the memory from this array */

}

Now testing this is very important.

What if all the memory is used? etc