>
> Hi Everyone,
>
> int
> main ()
> {
> int *p;
> int i;
>
> p = (int *) malloc (400 * sizeof (int));
> for (i = 0; i < 512; i++)
> {
> p[i] = i;
> printf ("p[%d]: %d\n", i, p[i]);
> }
> return 0;
> }
>
> The following code should terminate with Segmentation fault, right ?
> But when I tried, it works even beyond the limits of allocated area ...
> I am using Glibc - 2.3.2-11.9 , gcc - 3.2.2
>
> Is it a bug - malloc's implementation in Glibc.
> Does malloc allocates a complete 4k page for certain size of memory asked
> for?
>
> Infact, it gives a segmentation fault at 1681 location =>
> p[1681]: 1681
> Segmentation fault
>
> Or is it using Heap area ?
First why do you think this is a GCC bug?
Second you are invoking undefined behavior by accessing passed the array bounds
(or allocated
bounds by malloc).
-- Pinski
