diff --git a/mmtk/Cargo.lock b/mmtk/Cargo.lock
index d923e90..5e5b22d 100644
--- a/mmtk/Cargo.lock
+++ b/mmtk/Cargo.lock
@@ -99,9 +99,9 @@ checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
 [[package]]
 name = "built"
-version = "0.7.3"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6a6c0b39c38fd754ac338b00a88066436389c0f029da5d37d1e01091d9b7c17"
+checksum = "236e6289eda5a812bc6b53c3b024039382a2895fbbeef2d748b2931546d392c4"
 dependencies = [
  "git2",
 ]
@@ -123,14 +123,14 @@ checksum = "1ee891b04274a59bd38b412188e24b849617b2e45a0fd8d057deb63e7403761b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.68",
+ "syn 2.0.70",
 ]
 
 [[package]]
 name = "cc"
-version = "1.0.104"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74b6a57f98764a267ff415d50a25e6e166f3831a5071af4995296ea97d210490"
+checksum = "eaff6f8ce506b9773fa786672d63fc7a191ffea1be33f72bbd4aeacefca9ffc8"
 dependencies = [
  "jobserver",
  "libc",
@@ -219,7 +219,7 @@ checksum = "4e018fccbeeb50ff26562ece792ed06659b9c2dae79ece77c4456bb10d9bf79b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.68",
+ "syn 2.0.70",
 ]
 
 [[package]]
@@ -251,7 +251,7 @@ checksum = "f282cfdfe92516eb26c2af8589c274c7c17681f5ecc03c18255fe741c6aa64eb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.68",
+ "syn 2.0.70",
 ]
 
 [[package]]
@@ -288,9 +288,9 @@ dependencies = [
 
 [[package]]
 name = "git2"
-version = "0.18.3"
+version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "232e6a7bfe35766bf715e55a88b39a700596c0ccfd88cd3680b4cdb40d66ef70"
+checksum = "b903b73e45dc0c6c596f2d37eccece7c1c8bb6e4407b001096387c63d0d93724"
 dependencies = [
  "bitflags",
  "libc",
@@ -376,9 +376,9 @@ checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.16.2+1.7.2"
+version = "0.17.0+1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee4126d8b4ee5c9d9ea891dd875cfdc1e9d0950437179104b183d7d8a74d24e8"
+checksum = "10472326a8a6477c3c20a64547b0059e4b0d086869eee31e6d7da728a8eb7224"
 dependencies = [
  "cc",
  "libc",
@@ -432,7 +432,7 @@ dependencies = [
 [[package]]
 name = "mmtk"
 version = "0.26.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=6cae51c40104d84bb74598ab3eba4f9ef8173e8e#6cae51c40104d84bb74598ab3eba4f9ef8173e8e"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=a3a72f8e5795678eff06fdc1524f0b429a62ccc0#a3a72f8e5795678eff06fdc1524f0b429a62ccc0"
 dependencies = [
  "atomic",
  "atomic-traits",
@@ -467,12 +467,12 @@ dependencies = [
 [[package]]
 name = "mmtk-macros"
 version = "0.26.0"
-source = "git+https://github.com/mmtk/mmtk-core.git?rev=6cae51c40104d84bb74598ab3eba4f9ef8173e8e#6cae51c40104d84bb74598ab3eba4f9ef8173e8e"
+source = "git+https://github.com/mmtk/mmtk-core.git?rev=a3a72f8e5795678eff06fdc1524f0b429a62ccc0#a3a72f8e5795678eff06fdc1524f0b429a62ccc0"
 dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.68",
+ "syn 2.0.70",
 ]
 
 [[package]]
@@ -692,7 +692,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.68",
+ "syn 2.0.70",
 ]
 
 [[package]]
@@ -707,9 +707,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.68"
+version = "2.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "901fa70d88b9d6c98022e23b4136f9f3e54e4662c3bc1bd1d84a42a9a0f0c1e9"
+checksum = "2f0209b68b3613b093e0ec905354eccaedcfe83b8cb37cbdeae64026c3064c16"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -718,9 +718,9 @@ dependencies = [
 
 [[package]]
 name = "sysinfo"
-version = "0.30.12"
+version = "0.30.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "732ffa00f53e6b2af46208fba5718d9662a421049204e156328b66791ffa15ae"
+checksum = "0a5b4ddaee55fb2bea2bf0e5000747e5f5c0de765e5a5ff87f4cd106439f4bb3"
 dependencies = [
  "cfg-if",
  "core-foundation-sys",
@@ -733,9 +733,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.6.1"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c55115c6fbe2d2bef26eb09ad74bde02d8255476fc0c7b515ef09fbb35742d82"
+checksum = "445e881f4f6d382d5f27c034e25eb92edd7c784ceab92a0937db7f2e9471b938"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -848,9 +848,9 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f0713a46559409d202e70e28227288446bf7841d3211583a4b53e3f6d96e7eb"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
  "windows_aarch64_gnullvm",
  "windows_aarch64_msvc",
@@ -864,48 +864,48 @@ dependencies = [
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7088eed71e8b8dda258ecc8bac5fb1153c5cffaf2578fc8ff5d61e23578d3263"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
 [[package]]
 name = "windows_i686_gnullvm"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index 8904734..6dc9c61 100644
--- a/mmtk/Cargo.toml
+++ b/mmtk/Cargo.toml
@@ -28,7 +28,7 @@ log = {version = "0.4", features = ["max_level_trace", "release_max_level_off"]
 # - change branch/rev
 # - 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 = "6cae51c40104d84bb74598ab3eba4f9ef8173e8e" }
+mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "a3a72f8e5795678eff06fdc1524f0b429a62ccc0" }
 # Uncomment the following to build locally - if you change the path locally, do not commit the change in a PR
 # mmtk = { path = "../repos/mmtk-core" }
 
diff --git a/mmtk/src/object_model.rs b/mmtk/src/object_model.rs
index e540ea3..47b4a65 100644
--- a/mmtk/src/object_model.rs
+++ b/mmtk/src/object_model.rs
@@ -230,18 +230,9 @@ impl ObjectModel<JikesRVM> for VMObjectModel {
         object.to_raw_address()
     }
 
-    #[inline(always)]
-    fn ref_to_address(object: ObjectReference) -> Address {
-        object.to_raw_address() + TIB_OFFSET
-    }
-
     const OBJECT_REF_OFFSET_LOWER_BOUND: isize = OBJECT_REF_OFFSET;
 
-    #[inline(always)]
-    fn address_to_ref(addr: Address) -> ObjectReference {
-        debug_assert!(!addr.is_zero());
-        unsafe { ObjectReference::from_raw_address_unchecked(addr + (-TIB_OFFSET)) }
-    }
+    const IN_OBJECT_ADDRESS_OFFSET: isize = TIB_OFFSET;
 
     fn dump_object(_object: ObjectReference) {
         unimplemented!()