runtime·MHeap_Alloc  527 src/pkg/runtime/malloc.h MSpan*	runtime·MHeap_Alloc(MHeap *h, uintptr npage, int32 sizeclass, bool large, bool needzero);
runtime·MHeap_Alloc  265 src/pkg/runtime/mcentral.c 	s = runtime·MHeap_Alloc(&runtime·mheap, npages, c->sizeclass, 0, 1);