3 files changed, 72 insertions, 0 deletions
diff --git a/src/vm/comutilnative.cpp b/src/vm/comutilnative.cpp
index 3ba0acefb9..aa2ed02a40 100644
--- a/src/vm/comutilnative.cpp
+++ b/src/vm/comutilnative.cpp
@@ -1238,6 +1238,64 @@ FCIMPL0(INT64, GCInterface::GetAllocatedBytesForCurrentThread)
 }
 FCIMPLEND
 
+#ifdef FEATURE_BASICFREEZE
+
+/*===============================RegisterFrozenSegment===============================
+**Action: Registers the frozen segment
+**Returns: segment_handle
+**Arguments: args-> pointer to section, size of section
+**Exceptions: None
+==============================================================================*/
+void* QCALLTYPE GCInterface::RegisterFrozenSegment(void* pSection, INT32 sizeSection)
+{
+    QCALL_CONTRACT;
+
+    void* retVal = nullptr;
+
+    BEGIN_QCALL;
+
+    _ASSERTE(pSection != nullptr);
+    _ASSERTE(sizeSection > 0);
+
+    GCX_COOP();
+
+    segment_info seginfo;
+    seginfo.pvMem           = pSection;
+    seginfo.ibFirstObject   = sizeof(ObjHeader);
+    seginfo.ibAllocated     = sizeSection;
+    seginfo.ibCommit        = seginfo.ibAllocated;
+    seginfo.ibReserved      = seginfo.ibAllocated;
+
+    retVal = (void*)GCHeapUtilities::GetGCHeap()->RegisterFrozenSegment(&seginfo);
+
+    END_QCALL;
+
+    return retVal;
+}
+
+/*===============================UnregisterFrozenSegment===============================
+**Action: Unregisters the frozen segment
+**Returns: void
+**Arguments: args-> segment handle
+**Exceptions: None
+==============================================================================*/
+void QCALLTYPE GCInterface::UnregisterFrozenSegment(void* segment)
+{
+    QCALL_CONTRACT;
+
+    BEGIN_QCALL;
+
+    _ASSERTE(segment != nullptr);
+
+    GCX_COOP();
+
+    GCHeapUtilities::GetGCHeap()->UnregisterFrozenSegment((segment_handle)segment);
+
+    END_QCALL;
+}
+
+#endif // FEATURE_BASICFREEZE
+
 /*==============================SuppressFinalize================================
 **Action: Indicate that an object's finalizer should not be run by the system
 **Arguments: Object of interest
diff --git a/src/vm/comutilnative.h b/src/vm/comutilnative.h
index e632acfb97..67c111bbb4 100644
--- a/src/vm/comutilnative.h
+++ b/src/vm/comutilnative.h
@@ -140,6 +140,14 @@ public:
     
     static FCDECL0(INT64,    GetAllocatedBytesForCurrentThread);
 
+#ifdef FEATURE_BASICFREEZE
+    static
+    void* QCALLTYPE RegisterFrozenSegment(void *pSection, INT32 sizeSection);
+
+    static
+    void QCALLTYPE UnregisterFrozenSegment(void *segmentHandle);
+#endif // FEATURE_BASICFREEZE
+
     static 
     int QCALLTYPE StartNoGCRegion(INT64 totalSize, BOOL lohSizeKnown, INT64 lohSize, BOOL disallowFullBlockingGC);
 
diff --git a/src/vm/ecalllist.h b/src/vm/ecalllist.h
index 7e1dc6954b..cc07d0e570 100644
--- a/src/vm/ecalllist.h
+++ b/src/vm/ecalllist.h
@@ -771,6 +771,12 @@ FCFuncStart(gGCInterfaceFuncs)
     FCFuncElement("_ReRegisterForFinalize", GCInterface::ReRegisterForFinalize)
 
     FCFuncElement("_GetAllocatedBytesForCurrentThread", GCInterface::GetAllocatedBytesForCurrentThread)
+
+#ifdef FEATURE_BASICFREEZE
+    QCFuncElement("_RegisterFrozenSegment", GCInterface::RegisterFrozenSegment)
+    QCFuncElement("_UnregisterFrozenSegment", GCInterface::UnregisterFrozenSegment)
+#endif // FEATURE_BASICFREEZE
+
 FCFuncEnd()
 
 FCFuncStart(gGCSettingsFuncs)