Use to_address for SFT access (#272)

Upstream change: mmtk/mmtk-core#1122

---------

Co-authored-by: mmtkgc-bot <[email protected]>

Author: wks

mmtk/Cargo.lock

@@ -32,7 +32,7 @@ memoffset = "0.9.0"
 # - 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 = "5ab62f96c006475285b00b6d20a8b1bf83b74a4d" }
+mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "e79e94e744660c486d5471f252ff05c4248bcea9" }
 # Uncomment the following to build locally
 # mmtk = { path = "../repos/mmtk-core" }
 

mmtk/Cargo.toml

@@ -198,7 +198,11 @@ pub extern "C" fn post_alloc(
 
 #[no_mangle]
 pub extern "C" fn will_never_move(object: ObjectReference) -> bool {
-    !object.is_movable()
+    if crate::use_compressed_oops() {
+        !object.is_movable::<OpenJDK<true>>()
+    } else {
+        !object.is_movable::<OpenJDK<false>>()
+    }
 }
 
 #[no_mangle]