Internal pointer support - Githubissues

mmtk / mmtk-core

Memory Management ToolKit

https://www.mmtk.io

Other

379 stars 69 forks source link

Internal pointer support #1165

Closed qinsoon closed 4 months ago

qinsoon commented 4 months ago

This PR adds internal pointer support. It supersedes https://github.com/mmtk/mmtk-core/pull/1155 which provides a simple but inefficient implementation for internal pointers. This PR is based on https://github.com/mmtk/mmtk-core/pull/1159 which adds requirements for object reference alignment.

This PR

adds memory_manager::find_object_from_internal_pointer
- The call is dispatched using SFT to each space.
- Large object space only checks the first word in VO bit for every page.
- Mark sweep and immix space only searches for the max object size for those spaces.
Allow iterating side metadata bits.
Allow loading raw byte/word in side metadata.

qinsoon commented 4 months ago

binding-refs RUBY_BINDING_REPO=qinsoon/mmtk-ruby RUBY_BINDING_REF=update-mmtk-core-pr-1165