We should convert the following calls to store an 32-bit offset instead. That way, the CDS archive will be smaller, and it will start-up faster because fewer pointers need to be relocated with ASLR

 0 ArchivePtrMarker::mark_pointer
 1 ArchiveBuilder::write_pointer_in_buffer
 2 ArchiveBuilder::write_pointer_in_buffer
 3 RunTimeClassInfo::init
 4 CopySharedClassInfoToArchive::do_entry
 5 DumpTimeSharedClassTable::iterate_all_live_classes
[...]
12 SystemDictionaryShared::write_dictionary
13 SystemDictionaryShared::write_to_archive
14 VM_PopulateDumpSharedSpace::dump_read_only_tables
15 VM_PopulateDumpSharedSpace::doit
16 VM_Operation::evaluate

 0 ArchivePtrMarker::mark_pointer
 1 ArchiveBuilder::write_pointer_in_buffer
 2 ArchiveBuilder::write_pointer_in_buffer
 3 LambdaProxyClassKey::init_for_archive
 4 RunTimeLambdaProxyClassInfo::init
 5 CopyLambdaProxyClassInfoToArchive::do_entry
[...]
 9 SystemDictionaryShared::write_lambda_proxy_class_dictionary
10 SystemDictionaryShared::write_to_archive
11 VM_PopulateDumpSharedSpace::dump_read_only_tables
12 VM_PopulateDumpSharedSpace::doit
13 VM_Operation::evaluate

 0 ArchivePtrMarker::mark_pointer*>
 1 LambdaFormInvokers::dump_static_archive_invokers
 2 VM_PopulateDumpSharedSpace::dump_read_only_tables
 3 VM_PopulateDumpSharedSpace::doit
 4 VM_Operation::evaluate

 0 ArchivePtrMarker::mark_pointer
 1 Modules::dump_main_module_name
 2 VM_PopulateDumpSharedSpace::dump_read_only_tables
 3 VM_PopulateDumpSharedSpace::doit
 4 VM_Operation::evaluate

 0 ArchivePtrMarker::mark_pointer
 1 AdjustLambdaProxyClassInfo::do_entry
[...]
 5 SystemDictionaryShared::adjust_lambda_proxy_class_dictionary
 6 VM_PopulateDumpSharedSpace::doit
 7 VM_Operation::evaluate

===========================================================================

For example, in RunTimeClassInfo, we have

class RunTimeClassInfo {
...
  InstanceKlass* _klass;

}

void RunTimeClassInfo::init(DumpTimeClassInfo& info) {
  ArchiveBuilder* builder = ArchiveBuilder::current();
  builder->write_pointer_in_buffer(&_klass, info._klass);

The above should be changed to:

class RunTimeClassInfo {
...
  u4 * _klass_offset;
  InstanceKlass* klass() { return (InstanceKlass*)(SharedBaseAddress + _klass_offset;}
}

void RunTimeClassInfo::init(DumpTimeClassInfo& info) {
  ArchiveBuilder* builder = ArchiveBuilder::curent();
  _klass_offset = builder->any_to_offset_u4(info._klass);

(Note: we already have similar logic in runTimeClassInfo.cpp:

      vf_constraints[i]._name = builder->any_to_offset_u4(info._verifier_constraints->at(i).name());
      vf_constraints[i]._from_name = builder->any_to_offset_u4(info._verifier_constraints->at(i).from_name());