8261088: Repeatable annotations without @target cannot have container…

…s that target module declarations

Backport-of: 60c11fef006124e6c2be6d958c78dc344bb777d5

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java

@@ -119,9 +119,6 @@ protected Check(Context context) {
         context.put(checkKey, this);
 
         names = Names.instance(context);
-        dfltTargetMeta = new Name[] { names.PACKAGE, names.TYPE,
-            names.FIELD, names.RECORD_COMPONENT, names.METHOD, names.CONSTRUCTOR,
-            names.ANNOTATION_TYPE, names.LOCAL_VARIABLE, names.PARAMETER, names.MODULE };
         log = Log.instance(context);
         rs = Resolve.instance(context);
         syms = Symtab.instance(context);
@@ -161,6 +158,7 @@ protected Check(Context context) {
 
         deferredLintHandler = DeferredLintHandler.instance(context);
 
+        allowModules = Feature.MODULES.allowedInSource(source);
         allowRecords = Feature.RECORDS.allowedInSource(source);
         allowSealed = Feature.SEALED_CLASSES.allowedInSource(source);
     }
@@ -194,6 +192,10 @@ protected Check(Context context) {
      */
     private DeferredLintHandler deferredLintHandler;
 
+    /** Are modules allowed
+     */
+    private final boolean allowModules;
+
     /** Are records allowed
      */
     private final boolean allowRecords;
@@ -3215,20 +3217,7 @@ private void validateTarget(TypeSymbol container, TypeSymbol contained, Diagnost
     /* get a set of names for the default target */
     private Set<Name> getDefaultTargetSet() {
         if (defaultTargets == null) {
-            Set<Name> targets = new HashSet<>();
-            targets.add(names.ANNOTATION_TYPE);
-            targets.add(names.CONSTRUCTOR);
-            targets.add(names.FIELD);
-            if (allowRecords) {
-                targets.add(names.RECORD_COMPONENT);
-            }
-            targets.add(names.LOCAL_VARIABLE);
-            targets.add(names.METHOD);
-            targets.add(names.PACKAGE);
-            targets.add(names.PARAMETER);
-            targets.add(names.TYPE);
-
-            defaultTargets = java.util.Collections.unmodifiableSet(targets);
+            defaultTargets = Set.of(defaultTargetMetaInfo());
         }
 
         return defaultTargets;
@@ -3428,8 +3417,26 @@ Attribute.Array getAttributeTargetAttribute(TypeSymbol s) {
         return (atValue instanceof Attribute.Array attributeArray) ? attributeArray : null;
     }
 
-    public final Name[] dfltTargetMeta;
+    private Name[] dfltTargetMeta;
     private Name[] defaultTargetMetaInfo() {
+        if (dfltTargetMeta == null) {
+            ArrayList<Name> defaultTargets = new ArrayList<>();
+            defaultTargets.add(names.PACKAGE);
+            defaultTargets.add(names.TYPE);
+            defaultTargets.add(names.FIELD);
+            defaultTargets.add(names.METHOD);
+            defaultTargets.add(names.CONSTRUCTOR);
+            defaultTargets.add(names.ANNOTATION_TYPE);
+            defaultTargets.add(names.LOCAL_VARIABLE);
+            defaultTargets.add(names.PARAMETER);
+            if (allowRecords) {
+              defaultTargets.add(names.RECORD_COMPONENT);
+            }
+            if (allowModules) {
+              defaultTargets.add(names.MODULE);
+            }
+            dfltTargetMeta = defaultTargets.toArray(new Name[0]);
+        }
         return dfltTargetMeta;
     }
 

test/langtools/tools/javac/annotations/8261088/T8261088.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2021, Alphabet LLC. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8261088
+ * @summary Repeatable annotations without Target cannot have containers that target module declarations
+ * @compile T8261088.java
+ */
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Repeatable;
+import java.lang.annotation.Target;
+
+@Target(ElementType.MODULE)
+@interface TC {
+    T[] value() default {};
+}
+
+@Repeatable(TC.class)
+@interface T {}

test/langtools/tools/javac/annotations/repeatingAnnotations/NoTargetOnContainer.java

@@ -25,7 +25,7 @@
 
 /**
  * @test
- * @bug 8006547
+ * @bug 8006547 8261088
  * @compile NoTargetOnContainer.java
  */
 
@@ -42,7 +42,8 @@
     ElementType.PACKAGE,
     ElementType.ANNOTATION_TYPE,
     ElementType.FIELD,
-    ElementType.RECORD_COMPONENT
+    ElementType.RECORD_COMPONENT,
+    ElementType.MODULE,
 })
 @Repeatable(FooContainer.class)
 @interface Foo {}

test/langtools/tools/javac/annotations/repeatingAnnotations/NoTargetOnContainer2.java

@@ -25,7 +25,7 @@
 
 /**
  * @test
- * @bug 8006547
+ * @bug 8006547 8261088
  * @compile NoTargetOnContainer2.java
  */
 
@@ -44,7 +44,8 @@
     ElementType.FIELD,
     ElementType.TYPE_USE,
     ElementType.TYPE_PARAMETER,
-    ElementType.RECORD_COMPONENT
+    ElementType.RECORD_COMPONENT,
+    ElementType.MODULE,
 })
 @Repeatable(FooContainer.class)
 @interface Foo {}