Current heap layout of generational mark-sweep GC

[Jon Masamitsu]

Neo,

Are you asking specifically about CHeap usage by the
garbage collector (i.e., you're not interested in the
compiler's use CHeap space)?

Jon


Neo Jia wrote:

> hi,
>
> I am wondering that for the generational mark-sweep GC, if the block
> offset shared array is the last allocated object on the CHeap.
>
> The following is my understanding of the current heap layout:
>
> 1. The nursery space is on the lowest address
> 2. The mature space is following the nursery address.
> 3. The permanent space is following the nursery address at a higher 
> address.
> 4. The card table is allocated from the end of the permanent space,
> the regions inside it will be mapped to these previous three spaces
> sequentially, from lower address to higher address.
> 5. The block offset shared array used by the mature space will be
> allocated at the end of the card table area, which is used by mature
> space. And the virtual space size of this area will be set according
> to the mature space and word bits.
>
> So, is there any space allocated following?
>
> Thanks,
> Neo