I found the comments of `findObject` in the runtime source:
```go
// findObject returns the base address for the heap object **containing**
// the address p, the object's span, and the index of the object in s.
// If p does not point into a heap object, it returns base == 0.
//
// If p points is a
It suddenly occurred to me that it was very like `re-slice` —— as long as
part of the underlying array is referenced, the whole underlying array is
never gc-ed. I guess there is a method in gc which could locate the whole
underlying array as long as one address inside the array's address interva
