$ java -cp /home/iklam/tmp/HelloWorld.jar -XX:ArchiveClassesAtExit=/tmp/foo.jsa HelloWorld

$ java -cp /home/iklam/tmp/HelloWorld.jar -XX:SharedArchiveFile=/tmp/foo.jsa -Xlog:cds=debug -Xlog:cds+reloc=debug -XX:ArchiveRelocationMode=1 HelloWorld | grep -i bitmap
[0.034s][debug][cds,reloc] mapped relocation bitmap @ 0x00007f74e00a4000 (1572631 bits)
[0.064s][debug][cds,reloc] mapped relocation bitmap @ 0x00007f74e456a000 (1228 bits)
[0.065s][info ][cds ] Unmapping region #3 at base 0x00007f74e00a4000 (Bitmap)

Note that there's no unmapping of the 0x00007f74e456a000 region