src/java.base/share/classes/sun/launcher/LauncherHelper.java

*** 100,10 ***
--- 100,11 ---
              "sun.launcher.LauncherHelper$FXHelper";
      private static final String LAUNCHER_AGENT_CLASS = "Launcher-Agent-Class";
      private static final String MAIN_CLASS = "Main-Class";
      private static final String ADD_EXPORTS = "Add-Exports";
      private static final String ADD_OPENS = "Add-Opens";
+     private static final String ENABLE_NATIVE_ACCESS = "Enable-Native-Access";
  
      private static StringBuilder outBuf = new StringBuilder();
  
      private static final String INDENT = "    ";
      private static final String VM_SETTINGS     = "VM settings:";

*** 630,10 ***
--- 631,17 ---
              }
              String opens = mainAttrs.getValue(ADD_OPENS);
              if (opens != null) {
                  addExportsOrOpens(opens, true);
              }
+             String enableNativeAccess = mainAttrs.getValue(ENABLE_NATIVE_ACCESS);
+             if (enableNativeAccess != null) {
+                 if (!enableNativeAccess.equals("ALL-UNNAMED")) {
+                     throw new IllegalArgumentException("Only ALL-UNNAMED allowed as value for " + ENABLE_NATIVE_ACCESS);
+                 }
+                 Modules.addEnableNativeAccessToAllUnnamed();
+             }
  
              /*
               * Hand off to FXHelper if it detects a JavaFX application
               * This must be done after ensuring a Main-Class entry
               * exists to enforce compliance with the jar specification