--- old/src/os/posix/vm/os_posix.cpp	2016-04-01 17:05:27.028927611 -0700
+++ new/src/os/posix/vm/os_posix.cpp	2016-04-01 17:05:26.964927610 -0700
@@ -136,6 +136,21 @@
   return;
 }
 
+// Reserve memory by creating a temporary file in the provided directory and using it for mmap() call
+// This function is only relevant to Linux. Report failure when called for other OSes
+char* os::reserve_memory_with_backing_file(size_t bytes, char* requested_addr, size_t alignment_hint, const char* backingFileDir) {
+#ifdef TARGET_OS_FAMILY_linux
+  char* result = os::Linux::reserve_memory_with_backing_file(bytes, requested_addr, alignment_hint, backingFileDir);
+  if (result != NULL) {
+    MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC);
+  }
+  return result;
+#else
+  VMError::report_and_die("Allocating object heap with backing file is not supported for this OS");
+  return NULL;
+#endif
+}
+
 // Multiple threads can race in this code, and can remap over each other with MAP_FIXED,
 // so on posix, unmap the section at the start and at the end of the chunk that we mapped
 // rather than unmapping and remapping the whole chunk to get requested alignment.