--- old/share/runtime/os.cpp	2018-06-15 09:47:42.642912571 -0700
+++ new/share/runtime/os.cpp	2018-06-15 09:47:42.606912570 -0700
@@ -76,6 +76,11 @@
 uintptr_t         os::_serialize_page_mask = 0;
 volatile unsigned int os::_rand_seed      = 1;
 int               os::_processor_count    = 0;
+bool              os::_nvdimm_present     = false;
+int               os::_nvdimm_fd          = -1;
+address           os::_dram_heap_base     = NULL;
+address           os::_nvdimm_heap_base   = NULL;
+uint              os::_nvdimm_region_length = 0;
 int               os::_initial_active_processor_count = 0;
 size_t            os::_page_sizes[os::page_sizes_max];
 
@@ -1746,6 +1751,17 @@
   return res;
 }
 
+bool os::commit_memory(char* addr, size_t size, bool executable, int file_desc, size_t offset) {
+  
+  bool res = false;
+  
+  if (os::map_memory_to_file(addr, size, file_desc, offset, executable, false) != NULL) {
+    MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC);
+    return true;
+  }
+  return false;
+}
+
 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
                               bool executable) {
   bool res = os::pd_commit_memory(addr, size, alignment_hint, executable);
@@ -1755,6 +1771,18 @@
   return res;
 }
 
+bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
+                              bool executable, int file_desc, size_t offset) {
+  
+  // ignoring alignemnt hint.
+  bool res = false;
+  if (os::map_memory_to_file(addr, size, file_desc, offset, executable, false) != NULL) {
+    MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC);
+    return true;
+  }
+  return false;
+}
+
 void os::commit_memory_or_exit(char* addr, size_t bytes, bool executable,
                                const char* mesg) {
   pd_commit_memory_or_exit(addr, bytes, executable, mesg);