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0.18.0 (2023-04-03)

  • Support the StickyImmix plan.
  • Fix a bug in the C2 compiler where we may update an object without any write barrier if C2 performs deoptimization and triggers a GC in deoptimization. We use object_probable_write to properly log the object.
  • Update to OpenJDK 11.0.19+1 (jdk-11.0.19+1-mmtk).
  • Update to mmtk-core 0.18.0.

0.17.0 (2023-02-17)

  • MMTk OpenJDK binding now uses Rust 1.66.1 and MSRV is 1.61.0.
  • Support dynamic heap resizing (enabled when Xmx and Xms values are different).
  • Remove all inline directives. We rely on Rust compiler and PGO for inline decisions. Add provide a PGO guide.
  • Fix a crash caused by null pointer access if the VM calls CollectedHeap::soft_ref_policy().
  • Update to mmtk-core 0.17.0.

0.16.0 (2022-12-06)

  • MMTk OpenJDK binding now uses Rust edition 2021.
  • Support MMTk's native mark sweep plan.
  • Rename a few functions so they have consistent names across Rust and C++.
  • Fix a compilation error when barrier fast path is disabled.
  • Fix the wrong function pointer type in Rust that refers to a native function pointer.
  • Update to mmtk-core 0.16.0.

0.15.0 (2022-09-20)

  • Add MMTk build info to -Xinternalversion.
  • Implement arraycopy barriers.
  • Update to mmtk-core 0.15.0.

0.14.1 (2022-08-10)

  • Fix a bug that MMTk gets initialized even when we are not using MMTk's GC.

0.14.0 (2022-08-08)

  • Remove incorrect MMTkRootScanWorkScope.
  • Remove unused compute_*_roots functions.
  • Optimize CodeCache roots scanning.
  • Fix a bug that mmtk_start_the_world_count may be incorrect.
  • Update documentation about evaluation builds.
  • Inlucde Cargo.lock in the repository.
  • Update to mmtk-core 0.14.0.

0.13.0 (2022-06-27)

  • Fixes a bug that may cause programs to hang in stop-the-world synchronization.
  • Updates to mmtk-core 0.13.0.

0.12.0 (2022-05-13)

  • Adds a few missing includes.
  • Adds weak reference support (It is disabled by default. Set MMTk option no_reference_types to false to enable it).
  • Fixes a bug in C2 allocation fastpath generation for mark compact which caused significant slowdown for mark compact allocation.
  • Fixes a bug in transitioning thread state for the harness_begin call which may cause a 'deadlock in safepoint code' error.
  • Updates the OpenJDK version to 11.0.15+8.
  • Updates to mmtk-core 0.12.0.

0.11.0 (2022-04-01)

  • The OpenJDK submodule is removed from the repo. We now record the VM version in [package.metadata.openjdk] in the Cargo manifest Cargo.toml.
  • The OpenJDK binding now builds with stable Rust toolchains.
  • Removes object_alignment from OpenJDK_Upcalls.
  • Implements ObjectModel::get_reference_when_copied_to().
  • Updates to mmtk-core 0.11.0.

0.10.0 (2022-02-14)

  • Implements a fastpath for ObjectModel::get_current_size() in Rust.
  • Supports setting MMTk options by -XX:THIRD_PARTY_HEAP_OPTIONS=
  • Supports proper OutOfMemory exceptions.
  • Updates to mmtk-core 0.10.0.

0.9.0 (2021-12-16)

  • Supports the MarkCompact plan.
  • Updates to mmtk-core 0.9.0.

0.8.0 (2021-11-01)

  • Introduces A VM companion thread to trigger safe point synchronisation. This fixed a bug that MMTk's call to SafePointerSynchronize::begin() may race with the OpenJDK's VM thread.
  • Changes COORDINATOR_ONLY_STW to false. Stopping and resuming mutators are done by the companion thread, amd it is no longer a requirement for them to be done by the same GC thread.
  • Fixes a bug that for some allocations, both fastpath and slowpath were invoked.
  • Fixes a bug in generating code to set the alloc bit in C1 compiler.
  • Fixes a bug that some derived pointers were missing as roots.
  • Updates to mmtk-core 0.8.0.

0.7.0 (2021-09-22)

  • Supports the GenImmix plan.
  • Supports the global_alloc_bit feature in mmtk-core.
  • Fixes monitor misuse in the finalizer thread.
  • Fixes style for C++ code to match OpenJDK style guidelines.
  • Updates to mmtk-core 0.7.0.

0.6.0 (2021-08-10)

  • Supports the Immix plan.
  • Uses side mark bit by default. Adds a feature 'mark_bit_in_header' to switch to in-header mark bit.
  • Adds a size check for allocation so over-sized objects will be allocated to large object space.
  • Updates to mmtk-core 0.6.0.

0.5.0 (2021-06-28)

  • Supports the new PageProtect plan, added to help debugging.
  • Updates ObjectModel to support the new metadata structure, where the bindings decide whether to put each per-object metadata on side or in object header.
  • Updates to mmtk-core 0.5.0.

0.4.0 (2021-05-17)

  • Fixes a bug where benchmarks failed randomly due to duplicate edges
  • Switches to our new OpenJDK fork (11.0.11+6-mmtk) which is based-on OpenJDK-11 update repo
  • Adds style checks
  • Cleans up some unused code
  • Updates to mmtk-core 0.4.0

0.3.0 (2021-04-01)

  • Supports the marksweep plan in mmtk-core.
  • Supports fastpath for object barrier (used in gencopy).
  • Supports finalization
  • Supports runtime plan selection (through the environment variable MMTK_PLAN)
  • Updates to mmtk-core 0.3.0

0.2.0 (2020-12-18)

  • Supports the gencopy plan in mmtk-core.
  • Fixes a bug for incorrect heap boundary check.
  • Updated to mmtk-core 0.2.0.

0.1.0 (2020-11-04)

  • Supports the following plans from mmtk-core:
    • NoGC
    • SemiSpace