[Dlang-internal] Is there has document that about dlang GC design and implement？

[mw]

On Sunday, 24 May 2020 at 16:12:44 UTC, mw wrote:
> On Friday, 18 October 2019 at 07:07:06 UTC, lili wrote:
>> exclude read source， how to learn GC implement。
>
> Google search “gc document site:dlang.org”
>
> may find some info, e.g.
>
> https://wiki.dlang.org/DIP46

https://dlang.org/spec/garbage.html

esp.

https://dlang.org/spec/garbage.html#how_gc_works

How Garbage Collection Works

The GC works by:

Stopping all other threads than the thread currently trying to 
allocate GC memory.
‘Hijacking’ the current thread for GC work.
Scanning all ‘root’ memory ranges for pointers into GC allocated 
memory.
Recursively scanning all allocated memory pointed to by roots 
looking for more pointers into GC allocated memory.
Freeing all GC allocated memory that has no active pointers to it 
and do not need destructors to run.
Queueing all unreachable memory that needs destructors to run.
Resuming all other threads.
Running destructors for all queued memory.
Freeing any remaining unreachable memory.
Returning the current thread to whatever work it was doing.