[runtime] Various Improvements on `DataBuffer`

Open ppenna opened this issue 2 years ago • 1 comments

Description

We should introduce various additional fields in the DataBuffer abstraction:

[ ] an identifier for the memory allocator the buffer space came from.
[ ] one that "remembers" the original length of the data allocation (i.e. before any adjust or trim), as it might be useful in the future.
[ ] next and prev pointers for putting on lists w/o extra allocations.
[ ] an "extra" field that each LibOs can use for whatever it wants (we should have space for another 64 bit field in this struct before we exceed the x86 cache line size).