Attempt to support garbage collected arrays/vectors #29
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This crashes even the most basic tests :( Everything is broken. I feel like I need to cleanup.
Techcable
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impl-simple
This was referenced Jul 4, 2021
Using the small-object-arenas allocator still causes a SEGFAULT unfortunately. However, I've made significant progress ;)
As of now, the 'array' tests pass. Add cfg!(zerogc_simple_debug_alloc) which adds internal padding bytes. This was very helpful in finding this bug ;)
They should suppress the generation of implicit where bounds
They are unsafe, because GcVec has an explicit reference to the owning context, which cant be meaningfully erased. Add GcVec::extend_from_slice
Mostly a copy of the "arrays" test. It's even in the same file.
Dangling pointers don't have a valid `GcVecHeader`, so its not possible to fetch the length/capacity. The allocated vector is a singleton (assuming proper alignment), so we still wont waste much memory.
Also remove the Drop impl from GcRawVec. Dropping is the responsibility of the underlying RawVecRepr.
We were including the header in the 'value_layout', which should only be the array value....
If we want to keep using it, we need the garbage collector to preserve it.... Fix GcVec::extend_from_slice to correctly do set_len
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You are right @andersk . I'll put that next on my TODO list :) |
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This crashes even the most basic tests :(
Everything is broken.
I feel like I need to clean up the allocator interface even more.
NOTE: This supersedes #20