On Wednesday, 2 September 2015 at 18:25:11 UTC, Jacob Carlborg
wrote:
c
On 2015-09-02 18:09, Brandon Ragland wrote:
This is just a figurative idea, perhaps for my own amusement...
I've browsed the D runtime GC source code for the last few
days and I'm
still undecided on what the actual method of "replacing" the
existing GC
would be.
Say for example, I decided to tinker and create my own GC
(disregard the
fact that it'd be slower / faster, this is for learning
purposes only).
Is there a way to "insert" a new GC implementation, and what
is the
actual interface the GC is using to connect to the core
runtime of D?
I see several GC related structs, etc. kind of spit
everywhere, and
determining which one is the actual core _interface_ is
seeming more
difficult than I thought.
Any hints, or pointing to the correct direction would be very
helpful.
From the looks of it, it doesn't seem obvious.
There's a minimal example of a GC in the druntime source code
[1]. For actually replacing the current one with your custom, I
think the easiest would be to just implement the necessary
functions in your application. They will take precedence over
the ones in druntime when linking.
[1]
https://github.com/D-Programming-Language/druntime/blob/master/src/gcstub/gc.d
While that may be true, if the purpose was to ensure tracking and
collection of objects / arrays created with the new expression,
how would one do that without knowledge of the actual
implementation and the interface?
Same would go for slicing operations, which would be difficult to
track.
You'd have to pass a pointer to that new object onto the custom
GC, or it will never see it. Quick way to have huge memory
leaks...
