--- old/src/hotspot/share/include/cds.h	2019-10-28 17:14:22.082012323 -0700
+++ new/src/hotspot/share/include/cds.h	2019-10-28 17:14:21.649996863 -0700
@@ -43,7 +43,8 @@
   int     _crc;               // CRC checksum of this region.
   int     _read_only;         // read only region?
   int     _allow_exec;        // executable code in this region?
-  int     _is_heap_region;    // Used in debug build only.
+  int     _is_heap_region;    // Used by SA and debug build.
+  int     _is_bitmap_region;  // Relocation bitmap for RO/RW/MC/MD regions (used by SA and debug build).
   int     _mapped_from_file;  // Is this region mapped from a file?
                               // If false, this region was initialized using os::read().
   size_t  _file_offset;       // Data for this region starts at this offset in the archive file.