8301715: CDS should be disabled in exploded JDK

Reviewed-by: ccheung, coleenp

src/hotspot/share/cds/filemap.cpp

@@ -2570,6 +2570,7 @@ GrowableArray<const char*>* FileMapInfo::_non_existent_class_paths = nullptr;
 //     region of the archive, which is not mapped yet.
 bool FileMapInfo::initialize() {
   assert(UseSharedSpaces, "UseSharedSpaces expected.");
+  assert(Arguments::has_jimage(), "The shared archive file cannot be used with an exploded module build.");
 
   if (JvmtiExport::should_post_class_file_load_hook() && JvmtiExport::has_early_class_hook_env()) {
     // CDS assumes that no classes resolved in vmClasses::resolve_all()
@@ -2580,11 +2581,6 @@ bool FileMapInfo::initialize() {
     return false;
   }
 
-  if (!Arguments::has_jimage()) {
-    log_info(cds)("The shared archive file cannot be used with an exploded module build.");
-    return false;
-  }
-
   if (!open_for_read() || !init_from_file(_fd) || !validate_header()) {
     if (_is_static) {
       log_info(cds)("Initialize static archive failed.");

src/hotspot/share/runtime/arguments.cpp

@@ -2139,6 +2139,11 @@ jint Arguments::parse_vm_init_args(const JavaVMInitArgs *vm_options_args,
     return result;
   }
 
+  // Disable CDS for exploded image
+  if (!has_jimage()) {
+    no_shared_spaces("CDS disabled on exploded JDK");
+  }
+
   // We need to ensure processor and memory resources have been properly
   // configured - which may rely on arguments we just processed - before
   // doing the final argument processing. Any argument processing that