MMTk 0.3.1

Misc

• Changed the dependency of hoard-sys to v0.1 from crates.io.

MMTk 0.3.0

GC Plans

• Added a marksweep implementation.
• GC plans are now selected at run-time.

Allocators

• Added MallocAllocator that can be used as a freelist allocator.
• Added a few implementations of malloc/free that can be chosen as build-time features.

Policies

• Added MallocSpace.

API

• Added support for finalization.
• HAS_GC_BYTE in the ObjectModel trait is superseded by a feature 'side_gc_byte`.

Misc

• Added a general side metadata implementation.
• Added a framework for collecting analysis data.
• Added a framework that allows triggering analysis or sanity GC at byte-granularity.
• Added a tutorial for GC implementors.
• Added a porting guide for MMTk users (language implementors).
• GC workers now cache work locally.
• Fixed concurrency bugs in stack scanning and pointer forwarding.

MMTk 0.2.0

API

• Refactored the ObjectModel trait and it is clearer now that MMTk expects a GC byte from the VM.
• Removed methods in the API that were marked as deprecated.
• Minor changes to a few methods/traits in API.

Misc

• Rewrote the implementation of GC byte and forwarding word due to the API change.
• Calling gc_init() will not fail now if the binding has initialized its own logger.
• Fixed a few bugs about incorrect entries in SFT map.
• Fixed wrong allocator config for gencopy.
• Fixed a bug that caused MMTk to panic with OOM in stress tests.
• Fixed a bug that caused the first discontiguous space descriptor being considered as empty.

MMTk 0.1.0

GC Plans

Added the following plans:

• NoGC
• SemiSpace
• Generational Copying GC

Allocators

Added the following allocators:

• Bump Pointer Allocator
• Large Object Allocator

Policies

Added the following space policies:

• Immortal (including variants)
• Large object
• Copy

API

• Introduced bi-directional API between VM and MMTk

Misc

• Implemented a scheduler, GC work packets and related statistics collecting mechanisms.
• Implemented sanity checking.