Finalization hook, called FOR each thread. No assumptions about module initialization state should be made.
Initialization hook, called FROM each thread. No assumptions about module initialization state should be made.
GC sweep hook, called FOR each thread. Can be used to free additional thread local memory or associated data structures. Note that only memory allocated from the GC can have marks.
GC scan hook, called FOR each thread. Can be used to scan additional thread local memory.
Per thread record to store thread associated data for garbage collection.