Fix cbindgen

Author: wks

mmtk/Cargo.toml

@@ -12,7 +12,7 @@ edition = "2021"
 # Metadata for the Ruby repository
 [package.metadata.ci-repos.ruby]
 repo = "mmtk/ruby" # This is used by actions/checkout, so the format is "owner/repo", not URL.
-rev = "f63ea9a7ab846f8c1e0fab3ea61cdd1b364a661c"
+rev = "2a566599cdb83134df4c64a4991b26e2a96dc24a"
 
 [lib]
 name = "mmtk_ruby"

mmtk/cbindgen.toml

@@ -20,6 +20,7 @@ typedef rb_thread_t* MMTk_VMMutatorThread;
 typedef struct MMTk_GCThreadTLS* MMTk_VMWorkerThread;
 typedef void* MMTk_Address;
 typedef void* MMTk_ObjectReference;
+typedef void* MMTk_NullableObjectReference;
 typedef uint32_t MMTk_AllocationSemantics;
 """
 
@@ -34,6 +35,7 @@ typedef uint32_t MMTk_AllocationSemantics;
 "VMWorkerThread" = "MMTk_VMWorkerThread"
 "Address" = "MMTk_Address"
 "ObjectReference" = "MMTk_ObjectReference"
+"NullableObjectReference" = "MMTk_NullableObjectReference"
 "RawVecOfObjRef" = "MMTk_RawVecOfObjRef"
 "AllocationSemantics" = "MMTk_AllocationSemantics"
 "GC_THREAD_KIND_CONTROLLER" = "MMTK_GC_THREAD_KIND_CONTROLLER"