Bump version to v0.16 (#709)

CHANGELOG.md

@@ -1,3 +1,65 @@
+0.16.0 (2022-12-006)
+===
+
+Plan
+---
+
+* Refactor `MarkSweep` to work with both our native mark sweep policy and the malloc mark sweep policy backed by malloc libraries.
+
+Allocators
+---
+
+* Add `FreeListAllocator` which is implemented as a `MiMalloc` allocator.
+* Fix a bug in `ImmixAllocator` that alignment is properly taken into consideration when deciding whether to do overflow allocation.
+
+Policies
+---
+
+* Add `MarkSweepSpace`:
+  * It uses our native MiMalloc implementation in MMTk core.
+  * When the feature `malloc_mark_sweep` is enabled, it uses the selected malloc library to back up its allocation.
+* Malloc mark sweep now accounts for memory based on page usage, and each malloc library may use a different page size.
+* The immix space now uses the newly added `BlockPageResource`.
+* Changes to Space Function Table (SFT) to improve our boot time and reduce the memory footprint:
+  * Rename the current SFT map to `SFTSparseChunkMap`, and only use it for 32 bits architectures.
+  * Add `SFTSpaceMap` and by default use it for 64 bits architectures.
+  * Add `SFTDenseChunkMap` and use it when we have no control of the virtual address range for a MMTk space on 64 bits architectures.
+
+API
+---
+
+* Add an option `thread_affinity` to set processor affinity for MMTk GC threads.
+* Add `AllocationSemantics::NonMoving` to allocate objects that are known to be non-moving at allocation time.
+* Add `ReferenceGlue::is_referent_cleared` to allow some bindings to use a special value rather than a normal null reference for a cleared referent.
+* Add `pin`, `unpin`, and `is_pinned` for object pinning. Note that some spaces do not support object pinning, and using these methods may
+  cause panic if the space does not support object pinning.
+* Refactor `ObjectReference`:
+  * MMTk core now pervasively uses `ObjectModel::ref_to_address` to get an address from an object reference for setting per-object side metadata.
+  * Add `ObjectModel::address_to_ref` that does the opposite of `ref_to_address`: getting an object reference from an address that is returned by `ref_to_address`.
+  * Add `ObjectModel::ref_to_header` for the binding to tell us the base header address from an object reference.
+  * Rename `ObjectModel::object_start_ref` to `ObjectModel::ref_to_object_start` (to be consistent with other methods).
+  * Remove `ObjectModel::OBJECT_REF_OFFSET_BEYOND_CELL`, as we no longer use the raw address of an object reference.
+  * Add `ObjectModel::UNIFIED_OBJECT_REFERENCE_ADDRESS`. If a binding uses the same address for `ObjectReference`, `ref_to_address` and `ref_to_object_start`,
+    they should set this to `true`. MMTk can utilize this information for optimization.
+  * Add `ObjectModel::OBJECT_REF_OFFSET_LOWER_BOUND` to specify the minimam value of the possible offsets between an allocation result and object reference's raw address.
+* `destroy_mutator()` no longer requires a boxed mutator as its argument. Instead, a mutable reference to the mutator is required. It is made clear that the binding should
+  manage the lifetime of the boxed mutator from a `bind_mutator()` call.
+* Remove `VMBinding::LOG_MIN_ALIGNMENT` and `VMBinding::MAX_ALIGNMENT_SHIFT` (so we only keep `VMBinding::MIN_ALIGNMENT` and `VMBinding::MAX_ALIGNMENT`).
+
+Misc
+---
+
+* Add a lock-free `BlockPageResource` that can be used for policies that always allocate memory at the granularity of a fixed sized block.
+  This page resource facilitates block allocation and reclamation, and uses lock-free operations where possible.
+* Fix a race condition in `FreeListPageResource` when multiple threads release pages.
+* Fix a bug in `fetch_and/or` in our metadata implementation.
+* Fix a bug in side metadata bulk zeroing that may zero unrelated bits if the zeroed region cannot be mapped to whole metadata bytes.
+* Remove unused `meta_data_pages_per_region` in page resource implementations.
+* Remove the use of `MaybeUninit::uninit().assume_init()` in `FreeListPageResource` which has undefined behaviors
+  and causes the illegal instruction error with newer Rust toolchains.
+* Remove the trait bound `From<Address>` and `Into<Address>` for `Region`, as we cannot guarantee safe conversion between those two types.
+* Extract `Chunk` and `ChunkMap` from the immix policy, and make it available for all the policies.
+
 0.15.0 (2022-09-20)
 ===
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mmtk"
-version = "0.15.0"
+version = "0.16.0"
 authors = ["The MMTk Developers <>"]
 edition = "2021"
 license = "MIT OR Apache-2.0"
@@ -20,7 +20,7 @@ doctest = false
 
 [dependencies]
 # MMTk macros
-mmtk-macros = { version = "0.15.0", path = "macros/" }
+mmtk-macros = { version = "0.16.0", path = "macros/" }
 
 libc = "0.2"
 jemalloc-sys = { version = "0.3.2", features = ["disable_initial_exec_tls"], optional = true }

macros/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "mmtk-macros"
 # the macro crate uses the same version as mmtk-core
-version = "0.15.0"
+version = "0.16.0"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "MMTk macros provides procedural macros used by mmtk-core."