llvm dev - Apr 2021 - Implementing GC: Custom stackmaps for statepoints

Hi,
I’m trying to build a GC for my language and have some issues there, in
particular with stack maps. I’m using the statepoints approach and need
custom stackmap format (for AOT compiled code), which is basically just
offsets of pointers on the stack. I’ve read the doc
https://llvm.org/docs/StackMaps.html, but I can’t understand how to use it
to get just offsets of pointers on the stack. Could you please help?

Another question is about value types with pointers. Consider
%String = type {i32, i8*}
Does stackmap also records pointer within this value type?
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Anton,

It sounds like you have general getting started type questions. If you 
reach out to me directly, I'm happy to jump on a call and help answer 
any questions you've got.  I strongly prefer spoken conversation over 
email for this type of thing, so please *don't* send me a list of 
detailed questions.

Philip

On 4/8/21 3:33 AM, Anton Nadolskiy via llvm-dev wrote:
> Hi,
> I’m trying to build a GC for my language and have some issues there, 
> in particular with stack maps. I’m using the statepoints approach and 
> need custom stackmap format (for AOT compiled code), which is 
> basically just offsets of pointers on the stack. I’ve read the doc 
> https://llvm.org/docs/StackMaps.html 
> <https://llvm.org/docs/StackMaps.html>, but I can’t understand how to
> use it to get just offsets of pointers on the stack. Could you please 
> help?
>
> Another question is about value types with pointers. Consider
> %String = type {i32, i8*}
> Does stackmap also records pointer within this value type?
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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