Re: Integer overflow in operator new. Solved?

["Andrew Pinski" <pinskia at gmail dot com>]

On 4/9/07, J.C. Pizarro <jcpiza@gmail.com> wrote:
> #include <stddef.h>
>
> void *__allocate_array_OptionA(size_t num, size_t size) { // 1st best
>    unsigned long long tmp = (unsigned long long)size * num;
>    if (tmp >= 0x0000000080000000ULL) tmp=~size_t(0);
>    return operator new[](tmp);
> }

First this just happens to be the best for x86, what about PPC or
really any embedded target where people are more concern about code
size than say x86.

Also what about x86_64 where sizeof(size_t) == sizeof(unsigned long
long) so this trick is not going to work

-- Pinski