Replace uninitialize_collection with prepare/after fork.

Author: wks

Diff for: mmtk/Cargo.lock

@@ -36,11 +36,11 @@ probe = "0.5"
 features = ["is_mmtk_object", "object_pinning"]
 
 # Uncomment the following lines to use mmtk-core from the official repository.
-git = "https://github.com/wks/mmtk-core.git"
-rev = "7cb0b2c12be341c084e03f2cd943fad8ac088f83"
+#git = "https://github.com/wks/mmtk-core.git"
+#rev = "7cb0b2c12be341c084e03f2cd943fad8ac088f83"
 
 # Uncomment the following line to use mmtk-core from a local repository.
-#path = "../../mmtk-core"
+path = "../../mmtk-core"
 
 [features]
 default = []

Diff for: mmtk/Cargo.toml

@@ -155,8 +155,13 @@ pub extern "C" fn mmtk_initialize_collection(tls: VMThread) {
 }
 
 #[no_mangle]
-pub extern "C" fn mmtk_uninitialize_collection() {
-    memory_manager::uninitialize_collection(mmtk())
+pub extern "C" fn mmtk_prepare_to_fork() {
+    mmtk().prepare_to_fork();
+}
+
+#[no_mangle]
+pub extern "C" fn mmtk_after_fork(tls: VMThread) {
+    mmtk().after_fork(tls);
 }
 
 #[no_mangle]