Yi Lin

Results 120 issues of Yi Lin

We should include some information about implement certain language features in our porting guide, for example: * GC initialization * command line options * thread local structure (`Mutator`) * fastpath...

A-doc
C-missing
P-normal

Currently `DummyVM` uses `in_header(0)` for all the metadata specs in `ObjectModel`, which is definitely incorrect. As most VM portings would start from using side metadata for most of the specs,...

C-enhancement
A-doc

We should have simple kernel tests to drive critical part of mmtk-core code. This allows us to analyze performance without involving VM bindings. This also allows us to do thousands...

C-enhancement
P-high
A-test

We should provide a reference implementation of barriers' fastpath in Rust, just like what we have for the allocators. They may be directly called by a binding if a binding...

C-missing
A-utils

This closes https://github.com/mmtk/mmtk-core/issues/591.

Immix uses forwarding bits and pointers. However, it does not add them to its side metadata context. So if a binding uses side metadata for those specs, Immix won't initialise...

PR-testing

We need to remove `LOS` (and `LargeCode`) from `AllocationSemantics`. MMTk will check allocation size in `alloc()`.

C-bug
A-allocator

In the line in `ProcessEdgesWork`, https://github.com/mmtk/mmtk-core/blob/0babba20290d3c4e4cdb2a83284aa7204c9a23cc/src/scheduler/gc_work.rs#L449-L452 we check a constant `OVERWRITE_REFERENCE` and write back the reference returned by `trace_object()`. `OVERWRITE_REFERENCE` is defined per `ProcessEdgesWork`, which is currently per plan. In...

C-enhancement
A-work-queue

This feature would be helpful if a binding allows moving non-root objects, but not root objects. E.g. they are doing conservative stack scanning. The idea is simple: for root edges,...

C-feature
A-policy

`PlanConstraints` are constant for each plan. But some of its fields are unused, or superseded by other mechanisms. ## `moves_objects` https://github.com/mmtk/mmtk-core/blob/3dbdd7ae1076fb022f483b8b91cf37425dc6f0ee/src/plan/plan_constraints.rs#L11 `moves_objects` is superseded by `may_move_objects()` in `PlanTraceObject`, which is...

C-cleanup
A-plan
F-good-first-issue
P-normal