Module mmtk::policy::sft_map

Modules

• dense_chunk_map 🔒
• space_map 🔒
• sparse_chunk_map 🔒

Structs

• SFTRefStorage 🔒
  The type we store SFT raw pointer as. It basically just double word sized atomic integer. This type provides an abstraction so we can access SFT easily.

Traits

• SFTMap
  SFTMap manages the SFT table, and mapping between addresses with indices in the table. The trait allows us to have multiple implementations of the SFT table.

Functions

• create_sft_map 🔒

Type Aliases

• AtomicDoubleWord 🔒
  We store raw pointer as a double word using atomics. We use portable_atomic. It provides non locking atomic operations where possible, and use a locking operation as the fallback. Rust only provides AtomicU128 for some platforms, and do not provide the type on x86_64-linux, as some earlier x86_64 CPUs do not have 128 bits atomic instructions. The crate portable_atomic works around the problem with a runtime detection to see if 128 bits atomic instructions are available.
• DoubleWord 🔒
• SFTRawPointer 🔒
  The raw pointer for SFT. We expect a space to provide this to SFT map.