mmtk/plan/markcompact/
mutator.rs

1use super::MarkCompact;
2use crate::plan::mutator_context::common_prepare_func;
3use crate::plan::mutator_context::common_release_func;
4use crate::plan::mutator_context::create_allocator_mapping;
5use crate::plan::mutator_context::create_space_mapping;
6use crate::plan::mutator_context::Mutator;
7use crate::plan::mutator_context::MutatorBuilder;
8use crate::plan::mutator_context::MutatorConfig;
9use crate::plan::mutator_context::ReservedAllocators;
10use crate::plan::AllocationSemantics;
11use crate::util::alloc::allocators::AllocatorSelector;
12use crate::util::alloc::MarkCompactAllocator;
13use crate::util::opaque_pointer::*;
14use crate::vm::VMBinding;
15use crate::MMTK;
16use enum_map::EnumMap;
17
18const RESERVED_ALLOCATORS: ReservedAllocators = ReservedAllocators {
19    n_mark_compact: 1,
20    ..ReservedAllocators::DEFAULT
21};
22
23lazy_static! {
24    pub static ref ALLOCATOR_MAPPING: EnumMap<AllocationSemantics, AllocatorSelector> = {
25        let mut map = create_allocator_mapping(RESERVED_ALLOCATORS, true);
26        map[AllocationSemantics::Default] = AllocatorSelector::MarkCompact(0);
27        map
28    };
29}
30
31pub fn create_markcompact_mutator<VM: VMBinding>(
32    mutator_tls: VMMutatorThread,
33    mmtk: &'static MMTK<VM>,
34) -> Mutator<VM> {
35    let markcompact = mmtk.get_plan().downcast_ref::<MarkCompact<VM>>().unwrap();
36    let config = MutatorConfig {
37        allocator_mapping: &ALLOCATOR_MAPPING,
38        space_mapping: Box::new({
39            let mut vec = create_space_mapping(RESERVED_ALLOCATORS, true, markcompact);
40            vec.push((AllocatorSelector::MarkCompact(0), markcompact.mc_space()));
41            vec
42        }),
43        prepare_func: &common_prepare_func,
44        release_func: &markcompact_mutator_release,
45    };
46    let builder = MutatorBuilder::new(mutator_tls, mmtk, config);
47    builder.build()
48}
49
50pub fn markcompact_mutator_release<VM: VMBinding>(mutator: &mut Mutator<VM>, tls: VMWorkerThread) {
51    // reset the thread-local allocation bump pointer
52    let markcompact_allocator = unsafe {
53        mutator
54            .allocators
55            .get_allocator_mut(mutator.config.allocator_mapping[AllocationSemantics::Default])
56    }
57    .downcast_mut::<MarkCompactAllocator<VM>>()
58    .unwrap();
59    markcompact_allocator.reset();
60
61    common_release_func(mutator, tls);
62}
mmtk/plan/markcompact/mutator.rs

mmtk/plan/markcompact/
mutator.rs
