Removed unused ppp.rs

Author: peterzhu2118

gc/mmtk/src/binding.rs

@@ -10,7 +10,6 @@ use mmtk::MMTK;
 
 use crate::abi;
 use crate::abi::RubyBindingOptions;
-use crate::ppp::PPPRegistry;
 use crate::weak_proc::WeakProcessor;
 use crate::Ruby;
 
@@ -60,7 +59,6 @@ pub struct RubyBinding {
     pub upcalls: *const abi::RubyUpcalls,
     pub plan_name: Mutex<Option<CString>>,
     pub weak_proc: WeakProcessor,
-    pub ppp_registry: PPPRegistry,
     pub(crate) moved_givtbl: Mutex<HashMap<ObjectReference, MovedGIVTblEntry>>,
     pub gc_thread_join_handles: Mutex<Vec<JoinHandle<()>>>,
     pub wb_unprotected_objects: Mutex<HashSet<ObjectReference>>,
@@ -88,7 +86,6 @@ impl RubyBinding {
             upcalls,
             plan_name: Mutex::new(None),
             weak_proc: WeakProcessor::new(),
-            ppp_registry: PPPRegistry::new(),
             moved_givtbl: Default::default(),
             gc_thread_join_handles: Default::default(),
             wb_unprotected_objects: Default::default(),

gc/mmtk/src/collection.rs

@@ -16,12 +16,11 @@ impl Collection<Ruby> for VMCollection {
         crate::CONFIGURATION.gc_enabled.load(Ordering::Relaxed)
     }
 
-    fn stop_all_mutators<F>(tls: VMWorkerThread, mut mutator_visitor: F)
+    fn stop_all_mutators<F>(_tls: VMWorkerThread, mut mutator_visitor: F)
     where
         F: FnMut(&'static mut mmtk::Mutator<Ruby>),
     {
         (upcalls().stop_the_world)();
-        crate::binding().ppp_registry.pin_ppp_children(tls);
         (upcalls().get_mutators)(
             Self::notify_mutator_ready::<F>,
             &mut mutator_visitor as *mut F as *mut _,

gc/mmtk/src/lib.rs

@@ -2,7 +2,6 @@ extern crate libc;
 extern crate mmtk;
 #[macro_use]
 extern crate log;
-#[macro_use]
 extern crate probe;
 
 use std::collections::HashSet;
@@ -23,7 +22,6 @@ pub mod api;
 pub mod binding;
 pub mod collection;
 pub mod object_model;
-pub mod ppp;
 pub mod reference_glue;
 pub mod scanning;
 pub mod utils;

gc/mmtk/src/ppp.rs

@@ -134,7 +134,6 @@ impl Scanning<Ruby> for VMScanning {
         crate::binding()
             .weak_proc
             .process_weak_stuff(worker, tracer_context);
-        crate::binding().ppp_registry.cleanup_ppps();
         false
     }