mmtk/plan/pageprotect/
mutator.rs

1use super::PageProtect;
2use crate::plan::mutator_context::common_prepare_func;
3use crate::plan::mutator_context::common_release_func;
4use crate::plan::mutator_context::Mutator;
5use crate::plan::mutator_context::MutatorBuilder;
6use crate::plan::mutator_context::MutatorConfig;
7use crate::plan::mutator_context::{
8    create_allocator_mapping, create_space_mapping, ReservedAllocators,
9};
10use crate::plan::AllocationSemantics;
11use crate::util::alloc::allocators::AllocatorSelector;
12use crate::util::opaque_pointer::VMMutatorThread;
13use crate::vm::VMBinding;
14use crate::MMTK;
15use enum_map::EnumMap;
16
17const RESERVED_ALLOCATORS: ReservedAllocators = ReservedAllocators {
18    n_large_object: 1,
19    ..ReservedAllocators::DEFAULT
20};
21
22lazy_static! {
23    pub static ref ALLOCATOR_MAPPING: EnumMap<AllocationSemantics, AllocatorSelector> = {
24        let mut map = create_allocator_mapping(RESERVED_ALLOCATORS, true);
25        map[AllocationSemantics::Default] = AllocatorSelector::LargeObject(0);
26        map
27    };
28}
29
30/// Create a mutator instance.
31/// Every object is allocated to LOS.
32pub fn create_pp_mutator<VM: VMBinding>(
33    mutator_tls: VMMutatorThread,
34    mmtk: &'static MMTK<VM>,
35) -> Mutator<VM> {
36    let page = mmtk.get_plan().downcast_ref::<PageProtect<VM>>().unwrap();
37    let config = MutatorConfig {
38        allocator_mapping: &ALLOCATOR_MAPPING,
39        space_mapping: Box::new({
40            let mut vec = create_space_mapping(RESERVED_ALLOCATORS, true, page);
41            vec.push((AllocatorSelector::LargeObject(0), &page.space));
42            vec
43        }),
44        prepare_func: &common_prepare_func,
45        release_func: &common_release_func,
46    };
47
48    let builder = MutatorBuilder::new(mutator_tls, mmtk, config);
49    builder.build()
50}
mmtk/plan/pageprotect/mutator.rs

mmtk/plan/pageprotect/
mutator.rs
