Use the new API with Edge trait (#66)

mmtk/Cargo.toml

@@ -27,7 +27,7 @@ log = "*"
 # - change branch
 # - change repo name
 # But other changes including adding/removing whitespaces in commented lines may break the CI.
-mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "a96e8f991c91a81df51e7975849441f52fdbcdcc" }
+mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "76131c493be38e421f5fb157f9900f850584554f" }
 # Uncomment the following and fix the path to mmtk-core to build locally
 # mmtk = { path = "../repos/mmtk-core" }
 

mmtk/src/lib.rs

@@ -10,6 +10,7 @@ use std::ptr::null_mut;
 
 use libc::c_void;
 use mmtk::util::opaque_pointer::*;
+use mmtk::util::Address;
 use mmtk::util::ObjectReference;
 use mmtk::vm::VMBinding;
 use mmtk::MMTKBuilder;
@@ -46,13 +47,21 @@ pub static mut UPCALLS: *const V8_Upcalls = null_mut();
 #[derive(Default)]
 pub struct V8;
 
+/// The edge type of V8.
+///
+/// TODO: We start with Address to transition from the old API.
+/// We should define an edge type suitable for V8.
+pub type V8Edge = Address;
+
 impl VMBinding for V8 {
     type VMObjectModel = object_model::VMObjectModel;
     type VMScanning = scanning::VMScanning;
     type VMCollection = collection::VMCollection;
     type VMActivePlan = active_plan::VMActivePlan;
     type VMReferenceGlue = reference_glue::VMReferenceGlue;
 
+    type VMEdge = V8Edge;
+
     const MAX_ALIGNMENT: usize = 32;
 }
 

mmtk/src/scanning.rs

@@ -5,14 +5,15 @@ use mmtk::vm::RootsWorkFactory;
 use mmtk::vm::Scanning;
 use mmtk::Mutator;
 use V8;
+use V8Edge;
 
 pub struct VMScanning {}
 
 impl Scanning<V8> for VMScanning {
     const SCAN_MUTATORS_IN_SAFEPOINT: bool = false;
     const SINGLE_THREAD_MUTATOR_SCANNING: bool = false;
 
-    fn scan_object<EV: EdgeVisitor>(
+    fn scan_object<EV: EdgeVisitor<V8Edge>>(
         _tls: VMWorkerThread,
         _object: ObjectReference,
         _edge_visitor: &mut EV,
@@ -24,19 +25,19 @@ impl Scanning<V8> for VMScanning {
         unimplemented!()
     }
 
-    fn scan_thread_roots(_tls: VMWorkerThread, _factory: impl RootsWorkFactory) {
+    fn scan_thread_roots(_tls: VMWorkerThread, _factory: impl RootsWorkFactory<V8Edge>) {
         unimplemented!()
     }
 
     fn scan_thread_root(
         _tls: VMWorkerThread,
         _mutator: &'static mut Mutator<V8>,
-        _factory: impl RootsWorkFactory,
+        _factory: impl RootsWorkFactory<V8Edge>,
     ) {
         unimplemented!()
     }
 
-    fn scan_vm_specific_roots(_tls: VMWorkerThread, _factory: impl RootsWorkFactory) {
+    fn scan_vm_specific_roots(_tls: VMWorkerThread, _factory: impl RootsWorkFactory<V8Edge>) {
         unimplemented!()
     }