Summary:
Don't allocate large arrays on stack when copying native pointers, use heap based array.
Today the code copies the native pointers on the stack, since it may be too big, lets make sure to use heap based allocating using std::vector.
This array is afterwards converted into a reversed map from index to pointer, so it is heap based anyhow.
Changelog: [Internal] Don't allocate large arrays on stack when copying native pointers, use heap based array
Reviewed By: Andrey-Mishanin
Differential Revision: D28747213
fbshipit-source-id: da69b4b2d0960fdade9f07f44654b30d6dacc43a
e5acf77eea