MMTk 0.27.0

0.27.0 (2024-08-09)

What's Changed

Policy

• Clear pin bits by @udesou in #1166
• Set the unlog bits for objects in the bootimage by @k-sareen in #1168
• Fix bug in line mark when MARK_LINE_AT_SCAN_TIME=false by @k-sareen in #1171

API

• Require object reference to be aligned by @qinsoon in #1159
• Internal pointer support by @qinsoon in #1165
• Heap traversal by @wks in #1174

CI

• Parallelize and workaround CI style checks by @wks in #1184

Misc

• Extensible eBPF timeline attributes by @wks in #1162
• Only map with executable permissions when using code space by @k-sareen in #1176
• Fix style check for Rust 1.80 by @qinsoon in #1178
• Extra assertions for mutators and epilogues by @wks in #1182
• Refactor iterate_meta_bits by @wks in #1181

Full Changelog: v0.26.0...v0.27.0

MMTk 0.26.0

0.26.0 (2024-07-01)

What's Changed

Policy

• Clear side forwarding bits properly by @wks in #1138
• Fix mark bit clearing in PrepareChunkMap by @wks in #1148
• Let MarkSweepSpace use BlockPageResource by @wks in #1150
• Add SweepChunk to native MarkSweepSpace by @wks in #1158

API

• Rename edge to slot by @wks in #1134

Documentation

• Fix broken link and stale descriptions in doc by @wks in #1139
• API migration guide. by @wks in #1133
• Add back DummyVM as a part of the porting guide. Minor changes to MMTk initialization in the porting guide. by @qinsoon in #1142
• Fix broken link to mmtk.h by @wks in #1149

Misc

• Fix clippy warnings for Rust 1.79 by @wks in #1151
• Display number of slots in timeline visualization by @wks in #1154

Full Changelog: v0.25.0...v0.26.0

MMTk 0.25.0

0.25.0 (2024-05-17)

What's Changed

Plan

• Allow roots to be pinned for StickyImmix nursery collections by @k-sareen in #1108
• Check FULL_NURSERY_GC for StickyImmix as well by @k-sareen in #1124

Policy

• Remove data race for marksweep block lists by @qinsoon in #1112

Scheduler

• Remove coordinator and support forking by @wks in #1067

API

• Allow nursery size to be proportional to the heap size by @qinsoon in #1087
• Remove NULL ObjectReference by @wks in #1064
• Fix write barrier parameter type by @wks in #1130
• Allow querying if the current GC may move objects. by @wks in #1128

CI

• Use host toolchain and explicit target in CI script by @wks in #1109
• Fix ignores in merge check by @qinsoon in #1117
• Fix the openjdk test name in merge check by @qinsoon in #1119

Misc

• Bump dependencies after version 0.24 by @wks in #1105
• Don't use PROT_EXEC with mmap on macos by @eileencodes in #1110
• Rename associated types in GCWorkContext by @wks in #1116
• Add missing pinning metadata to mock_vm by @wks in #1121
• Use to_address for SFT access by @wks in #1122
• Ensure reference objects are either traced or cleared by @wks in #1126
• Dump process map on mmap failure and fix typos by @k-sareen in #1127
• Fix compiler errors and warnings for Rust 1.78.0 by @wks in #1132
• Remove fl_map and refactor FreeListPageResoure by @wks in #953

New Contributors

• @eileencodes made their first contribution in #1110

Full Changelog: v0.24.0...v0.25.0

MMTk 0.24.0

0.24.0 (2024-04-08)

What's Changed

Misc

• Check and fix broken links in docs by @qinsoon in #1085
• Allow binding to implement GC trigger by @qinsoon in #1083
• Resolve issues for unit tests on 32 bits by @qinsoon in #1095
• Use SFTDenseChunkMap on 64bits when vm_space is enabled by @qinsoon in #1094
• Fix warnings with the stable Rust toolchain by @wks in #1099
• Use proper logging for the treadmill by @wks in #1101

Full Changelog: v0.23.0...v0.24.0

MMTk 0.23.0

0.23.0 (2024-02-09)

What's Changed

API

• Ask from binding if GC is disabled by @udesou in #1075

CI

• Stop using the deprecated set-output in our CI configs by @qinsoon in #1059
• Rename CI tests to minimal/extended tests by @qinsoon in #1073
• Properly get PR number for merge group by @qinsoon in #1077

Misc

• MMTk Enhancement Proposal by @wks in #1056
• Timeline visualization tool by @wks in #1022
• Add a document for project principles by @qinsoon in #1069
• Fix un-cleared VO bits for contiguous monotone PR by @wks in #1071
• Use live memory to estimate collection pages in mem balancer by @qinsoon in #1050
• Fix issues in sanity GC by @qinsoon in #1079

Full Changelog: v0.22.1...v0.23.0

MMTk 0.22.1

0.22.1 (2024-01-11)

What's Changed

• Revert a mistake in v0.22 that prevents cargo publish by @qinsoon in #1065

Full Changelog: v0.22.0...v0.22.1

MMTk 0.22.0

0.22.0 (2023-12-21)

What's Changed

API

• Flush mutator buffers in destroy_mutator by @k-sareen in #1045
• NULL and movement check in process_edge by @wks in #1032

Documentation

• Mention revoking TLABs of all mutators after a GC by @k-sareen in #1018
• Add missing docs for the vm module by @qinsoon in #1021
• Add missing docs for some util modules by @qinsoon in #1024
• Add missing docs for the rest of the util module by @qinsoon in #1026
• Add missing docs for the rest of the code base (merge after #1026) by @qinsoon in #1028
• Update some stale comments by @k-sareen in #1036

CI

• Use new running scripts in ci-perf-kit by @qinsoon in #1005
• Upload perf build and log as artifacts (merge after #1005) by @qinsoon in #1011
• Fix multiple issues in recent CI changes by @qinsoon in #1014
• Fix CI for OpenJDK nogc config by @qinsoon in #1019
• Use ci-perf-kit 0.7.4: ignore runs with unmatched key/value in the logs. by @qinsoon in #1025
• Fix Ruby binding test repo checkout by @wks in #1048

Misc

• Post-release dependency version bump for v0.21.0 by @wks in #1013
• Introduce MockVM by @qinsoon in #1049

Full Changelog: v0.21.0...v0.22.0

MMTk 0.21.0

0.21.0 (2023-11-03)

What's Changed

Plan

• Move some states from BasePlan to GlobalState by @qinsoon in #949
• Extract set_collection_kind and set_gc_status by @qinsoon in #957
• Expose is_emergency_collection to VM bindings by @wks in #997

Policy

• Clear all side forwarding bits by @wks in #974
• Stop using the name "ForwardingWord" by @wks in #976
• Implement get_gc_trigger() for LockFreeImmortalSpace by @qinsoon in #1003

API

• Expose alloc_slow. Add a section in user guide about allocation optimization by @qinsoon in #967
• Use BumpPointer::default() by @qinsoon in #993
• Fix mention of to_object_reference() in comment by @k-sareen in #998

Documentation

• Fix rustdoc warnings in Rust 1.73 by @qinsoon in #978
• Add a section about debugging tips in user guide by @qinsoon in #987
• Update doc comments by @wks in #1000
• Add document for release by @qinsoon in #1007
• Move constants and add comments for stress copying by @wks in #1008
• Update bibtex of the tracing paper to include the DOI by @caizixian in #1009

CI

• Fix performance baseline workflow by @qinsoon in #971
• Allow auto merge binding PRs by @qinsoon in #988
• Apply a delay before we enable auto merge on a PR by @qinsoon in #992
• Use cargo generate-lockfile to update JikesRVM's Cargo.lock by @qinsoon in #996

Misc

• Add option to exclude kernel events from perf results by @k-sareen in #995

Full Changelog: v0.20.0...v0.21.0

MMTk 0.20.0

What's Changed

Plan

• Refactor derive macros and add HasSpaces trait by @wks in #934
• Make MarkCompact LOS support 2nd transitive closure by @wenyuzhao in #944
• Disabling PrepareMutator from PlanConstraints by @wks in #964

Policy

• Add ExternalPageResource and allow discontiguous VM space by @qinsoon in #864
• Discontiguous mark compact space support by @wenyuzhao in #939
• Discontiguous PageProtect GC support by @wenyuzhao in #946
• Fix vo-bit reset for discontiguous space by @wenyuzhao in #948

API

• Boot-time configurable heap constants by @wenyuzhao in #899
• This PR enables transitively pinning (TP) objects from particular roots for Immix/StickyImmix by @udesou in #897
• Let VM control when or if to read env var options by @wks in #955

Misc

• Update doc comment of Scanning::process_weak_refs by @wks in #919
• Binding test for Ruby by @wks in #916
• Fix api-check CI by @wks in #923
• Fix default value for RUBY_BINDING_REPO by @qinsoon in #926
• Add a ready-to-merge check by @qinsoon in #910
• Run ready to merge check for PRs by @qinsoon in #928
• Remove cast ref to mut everywhere by @playXE in #893
• Benchmark Rust code by @qinsoon in #933
• Fix broken links in the tutorial by @caizixian in #936
• Update doc to add a section for LTO by @qinsoon in #937
• Add CARGO_INCREMENTAL=0 to work around clippy 1.72 bug by @qinsoon in #938
• Fix issues for cargo fmt in 1.72 by @qinsoon in #940
• Use atomic operations for SFT map and remove unsafe code by @qinsoon in #931
• Fix outdated Rust version in README by @qinsoon in #942
• Fix length of Map64::descriptor_map by @wks in #956

Full Changelog: v0.19.0...v0.20.0

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