Module alloc 

Allocators Various allocators implementation.

Re-exports

pub use self::immix_allocator::ImmixAllocator;

pub use free_list_allocator::FreeListAllocator;

Modules

allocator 🔒

The allocator trait and allocation-related functions.

allocators 🔒

A list of all the allocators, embedded in Mutator

bumpallocator 🔒

Bump pointer allocator

embedded_meta_data 🔒

Embedded metadata pages

free_list_allocator

Free list allocator based on Mimalloc

immix_allocator

Immix allocator

large_object_allocator 🔒

malloc_allocator 🔒

An alloactor backed by malloc

markcompact_allocator 🔒

Mark compact allocator (actually a bump pointer allocator with an extra heade word)

Structs

AllocationOptions

Allow specifying different behaviors with Allocator::alloc_with_options.

BumpAllocator

A bump pointer allocator. It keeps a thread local allocation buffer, and bumps a cursor to allocate from the buffer.

BumpPointer

A common fast-path bump-pointer allocator shared across different allocator implementations that use bump-pointer allocation. A BumpPointer is always initialized with cursor = 0, limit = 0, so the first allocation always fails the check of cursor + size < limit and goes to the slowpath. A binding can also take advantage of this design to zero-initialize the a bump pointer.

LargeObjectAllocator

An allocator that only allocates at page granularity. This is intended for large objects.

MallocAllocator

The allocator that internally uses malloc for all the allocation requests. This allocator is only intended for experimental uses.

MarkCompactAllocator

A thin wrapper(specific implementation) of bump allocator reserve extra bytes when allocating

Enums

AllocationError

A list of errors that MMTk can encounter during allocation.

AllocatorInfo

This type describes allocator information. It is used to generate fast paths for the GC. All offset fields are relative to Mutator.

AllocatorSelector

This type describe an allocator in the crate::Mutator. For some VM bindings, they may need to access this type from native code. This type is equivalent to the following native types: #[repr(C)] struct AllocatorSelector { tag: AllocatorSelectorTag, payload: u8, } #[repr(u8)] enum AllocatorSelectorTag { BumpPointer, LargeObject, … }

Traits

Allocator

A trait which implements allocation routines. Every allocator needs to implements this trait.

Functions

fill_alignment_gap

Fill the specified region with the alignment value.