MMTk 0.19.0

0.19.0 (2023-08-18)

What's Changed

Plan

• Remove a warning in sticky immix trace_object_nursery by @qinsoon in #815
• Change default plan to GenImmix by @qinsoon in #819

Policy

• Remove redundant clear_nursery() by @tianleq in #799
• Introduce VMSpace, and allow VMSpace to be set lazily by @qinsoon in #802
• Fix an issue that the aligned VM space may not match the original location by @qinsoon in #809
• Remove some uses of mem::transmute in marksweep block by @qinsoon in #826
• Fix is_live for ImmixSpace by @wks in #842
• Sweep abandoned blocks in eager sweeping by @qinsoon in #830
• Fix VO bits for Immix by @wks in #849
• Fix unaligned access by @wks in #887

Scheduler

• Let the coordinator thread open buckets by @wks in #782
• No coordinator work by @wks in #794

Misc

• Rename "alloc bit" to "valid-object bit" (VO bit), the second attempt. by @wks in #791
• Add MarkState. Use MarkState for ImmortalSpace. by @qinsoon in #796
• Change info logging to debug in ImmortalSpace by @qinsoon in #801
• Reset nursery_index in finalizable processor if we remove objects from candidates by @qinsoon in #807
• Allow bulk set side metadata by @qinsoon in #808
• Some fixes for sanity GC by @qinsoon in #806
• Use extreme assertion for metadata mapped assert by @wks in #812
• Install the missing deps for i686 CI tests by @qinsoon in #816
• Use min nursery as mem balancer's extra memory by @qinsoon in #820
• Sort dependencies in alphabetical order by @k-sareen in #822
• Use sysinfo instead of sys-info-rs by @k-sareen in #827
• Let sysinfo only load memory-related info by @wks in #836
• Add extreme assertion for barrier slow path calls by @ArberSephirotheca in #833
• Refactor: Use Atomic<Address> where appropriate by @ClSlaid in #843
• Update porting guide by @k-sareen in #857
• Fix typo in doc comment by @k-sareen in #859
• Replace debug_assert in side_after with assert by @qinsoon in #873
• Work around stack overflow in array_from_fn by @wks in #876
• Let ObjectReference implement Ord by @wks in #870
• Add USDT tracepoints for key GC activities by @caizixian in #883
• Fix UB in SFTMap implementations by @playXE in #879
• Run CI build/unit test with latest stable Rust toolchain by @qinsoon in #885
• Document MSRV policy by @wks in #881
• Fix performance regression test scripts by @qinsoon in #892
• Run V8 binding tests on GitHub hosted runner by @caizixian in #900
• Add tracing tools and documentation by @caizixian in #898
• Run benchmarks for more plans on OpenJDK by @qinsoon in #901
• Apply style check on auxiliary crates (macros and dummyvm) by @caizixian in #913
• Call Collection::out_of_memory if the allocation size is larger than max heap size by @qinsoon in #896
• Add a unit test for comma-separated bulk option parsing by @caizixian in #911
• Merge tutorial and porting guide into user guide by @qinsoon in #907
• Fix broken links in README and cargo doc warnings by @caizixian in #912

API

• Add object() in MemorySlice by @qinsoon in #798
• Remove Collection::COORDINATOR_ONLY_STW by @ArberSephirotheca in #814
• Refactor: Change ActivePlan::mutators()'s return type by @ArberSephirotheca in #817
• Replace alloc-related offset type to usize instead isize by @fepicture in #838
• Rename ambiguous scan_thread_root{,s} functions by @k-sareen in #846
• Update comments on bind_mutator by @qinsoon in #854
• Counting VM-allocated pages into heap size. by @wks in #866
• Expose Allocators type to public API by @playXE in #880
• Collect live bytes during GC by @qinsoon in #768
• Tidy up mutator scan API by @qinsoon in #875
• Implement transparent hugepage support by @caizixian in #905
• Implement AllocatorInfo by @playXE in #889
• Add comma as an alternative options string separator by @wenyuzhao in #909

New Contributors

• @ArberSephirotheca made their first contribution in #814
• @fepicture made their first contribution in #838
• @ClSlaid made their first contribution in #843
• @playXE made their first contribution in #880

Full Changelog: v0.18.0...v0.19.0