increasing stack reserve size doesn't prevent stack overflow

Question

I would like to use a large array on the stack. However I keep on getting stack overflow although I changed the stack reserve size. For example:

int main()
{
    int a[5000000];
    return 0;
}

and in visual studio 2012: Properties -> Linker -> System -> Stack reserve size: 10000000

What could cause it?

Daniel Frey · Accepted Answer · 2013-11-04 18:17:18Z

5

The size of an int is probably 4 bytes, so the array is larger in bytes than in the number of elements. sizeof(int)*5000000 is what you need. (at least)

answered Nov 4, 2013 at 18:17

Daniel Frey

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1 Comment

Raz Cohen Over a year ago

Yeah, that's the reason... This is weird because I tried previously to do this and I noticed that adding 1 to the stack reserve size lets me define one more int (= size of DWORD on my computer): I put in the stack reserve size 0 and it let me do an array of ints of size 62200, and when I put there 1 it let me define an array of size 62201..

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