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8:08:49
frgo
kpoeck cracauer: Build succeeded with the given commit. Buuuut it hangs comopiling quicklisp now.
14:38:21
drmeister
I forgot to upgrade to BigSur on my macmini - so I'll bring in an extra power supply and do it at work.
14:38:51
drmeister
Lang Hames is working on the exception handling support for JITLink on llvm12 for linux.
14:45:45
drmeister
Then there is a pass in llvm that converts address space(1) annotations into stackmap entries. Badda bing.
14:47:55
drmeister
This means that our tagged_ptr and smart_ptr - which we use everywhere to indicate GC managed pointers - can be annotated to contain an address_space(1) pointer.
14:48:43
drmeister
There is a hitch. I haven't been completely dogmatic about using smart_ptr/tagged_ptr to indicate GC managed pointers.
14:49:28
drmeister
There are also internal pointers for things like strings. There has been some leakage into regular pointers.
14:50:21
Bike
i think i've mentioned this before, but i really don't like the array operators we have that let C++ get a regular pointer to the data
14:50:54
drmeister
I'm looking forward to incorporating MMTk where we can take more control of the stack scanning.
14:51:57
drmeister
We might be able to do something like precise GC from the stack - but pin objects that are on the stack.
14:52:58
drmeister
Rely on precise pointers to keep things alive and pinned from the stack. It's going to be a while to get there.
14:53:15
Bike
yeah, i'm not totally clear on what the statepoints stuff is doing with the addrspace markings
14:54:16
drmeister
The statepoints is independent. We define a @gc.safepoint_poll() function and provide the code for inlining in llvm.