runtime: use sparse mappings for the heap · golang/go@2b41554

This replaces the contiguous heap arena mapping with a potentially sparse mapping that can support heap mappings anywhere in the address space. This has several advantages over the current approach: * There is no longer any limit on the size of the Go heap. (Currently it's limited to 512GB.) Hence, this fixes #10460. * It eliminates many failures modes of heap initialization and growing. In partic

[mattn]

#golang のヒープは 512GB 制限があったけどこの変更で無くなった。