[GSoC] Precise GC
David Nadlinger via Digitalmars-d-announce
digitalmars-d-announce at puremagic.com
Thu Sep 8 13:47:17 PDT 2016
On Saturday, 3 September 2016 at 12:22:25 UTC, thedeemon wrote:
> On Friday, 2 September 2016 at 14:55:26 UTC, jmh530 wrote:
>> Anyway, with @safe unions, my thinking is that it would mean
>> that the garbage collector can be made precise in @safe code
>> in a way that it can't in @system code (assuming unions with
>> pointers aren't snuck in through @trusted).
>
> GC (and runtime in general) has no idea what code is safe and
> what code is system. GC works with data at run-time. All
> @safe-related stuff is about code (not data!) and happens at
> compile-time. They are completely orthogonal and independent,
> as I understand.
This is correct, but when designing a GC – in particular, a
precise GC –, having the compiler emit additional helpful
metadata to binaries is always an option worth considering.
— David
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