8316970: Add internal annotation to mark restricted methods

Reviewed-by: jvernee, iris, alanb

src/java.base/share/classes/java/lang/ModuleLayer.java

@@ -45,6 +45,7 @@ import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import jdk.internal.javac.PreviewFeature;
+import jdk.internal.javac.Restricted;
 import jdk.internal.loader.ClassLoaderValue;
 import jdk.internal.loader.Loader;
 import jdk.internal.loader.LoaderPool;
@@ -325,6 +326,7 @@ public final class ModuleLayer {
          */
         @PreviewFeature(feature=PreviewFeature.Feature.FOREIGN)
         @CallerSensitive
+        @Restricted
         public Controller enableNativeAccess(Module target) {
             ensureInLayer(target);
             Reflection.ensureNativeAccess(Reflection.getCallerClass(), Module.class,

src/java.base/share/classes/java/lang/foreign/AddressLayout.java

@@ -27,6 +27,7 @@ package java.lang.foreign;
 
 import jdk.internal.foreign.layout.ValueLayouts;
 import jdk.internal.javac.PreviewFeature;
+import jdk.internal.javac.Restricted;
 import jdk.internal.reflect.CallerSensitive;
 
 import java.lang.foreign.Linker.Option;
@@ -108,6 +109,7 @@ public sealed interface AddressLayout extends ValueLayout permits ValueLayouts.O
      * @see #targetLayout()
      */
     @CallerSensitive
+    @Restricted
     AddressLayout withTargetLayout(MemoryLayout layout);
 
     /**

src/java.base/share/classes/java/lang/foreign/Linker.java

@@ -30,6 +30,7 @@ import jdk.internal.foreign.abi.LinkerOptions;
 import jdk.internal.foreign.abi.CapturableState;
 import jdk.internal.foreign.abi.SharedUtils;
 import jdk.internal.javac.PreviewFeature;
+import jdk.internal.javac.Restricted;
 import jdk.internal.reflect.CallerSensitive;
 import jdk.internal.reflect.Reflection;
 
@@ -528,6 +529,7 @@ public sealed interface Linker permits AbstractLinker {
      * @see SymbolLookup
      */
     @CallerSensitive
+    @Restricted
     MethodHandle downcallHandle(MemorySegment address, FunctionDescriptor function, Option... options);
 
     /**
@@ -574,6 +576,7 @@ public sealed interface Linker permits AbstractLinker {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     MethodHandle downcallHandle(FunctionDescriptor function, Option... options);
 
     /**
@@ -618,6 +621,7 @@ public sealed interface Linker permits AbstractLinker {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     MemorySegment upcallStub(MethodHandle target, FunctionDescriptor function, Arena arena, Linker.Option... options);
 
     /**

src/java.base/share/classes/java/lang/foreign/MemorySegment.java

@@ -50,6 +50,7 @@ import jdk.internal.foreign.Utils;
 import jdk.internal.foreign.abi.SharedUtils;
 import jdk.internal.foreign.layout.ValueLayouts;
 import jdk.internal.javac.PreviewFeature;
+import jdk.internal.javac.Restricted;
 import jdk.internal.reflect.CallerSensitive;
 import jdk.internal.vm.annotation.ForceInline;
 
@@ -607,6 +608,7 @@ public sealed interface MemorySegment permits AbstractMemorySegmentImpl {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     MemorySegment reinterpret(long newSize);
 
     /**
@@ -646,6 +648,7 @@ public sealed interface MemorySegment permits AbstractMemorySegmentImpl {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     MemorySegment reinterpret(Arena arena, Consumer<MemorySegment> cleanup);
 
     /**
@@ -688,6 +691,7 @@ public sealed interface MemorySegment permits AbstractMemorySegmentImpl {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     MemorySegment reinterpret(long newSize, Arena arena, Consumer<MemorySegment> cleanup);
 
     /**

src/java.base/share/classes/java/lang/foreign/SymbolLookup.java

@@ -30,6 +30,7 @@ import jdk.internal.access.SharedSecrets;
 import jdk.internal.foreign.MemorySessionImpl;
 import jdk.internal.foreign.Utils;
 import jdk.internal.javac.PreviewFeature;
+import jdk.internal.javac.Restricted;
 import jdk.internal.loader.BuiltinClassLoader;
 import jdk.internal.loader.NativeLibrary;
 import jdk.internal.loader.RawNativeLibraries;
@@ -232,6 +233,7 @@ public interface SymbolLookup {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     static SymbolLookup libraryLookup(String name, Arena arena) {
         Reflection.ensureNativeAccess(Reflection.getCallerClass(), SymbolLookup.class, "libraryLookup");
         if (Utils.containsNullChars(name)) {
@@ -264,6 +266,7 @@ public interface SymbolLookup {
      * @throws IllegalCallerException If the caller is in a module that does not have native access enabled.
      */
     @CallerSensitive
+    @Restricted
     static SymbolLookup libraryLookup(Path path, Arena arena) {
         Reflection.ensureNativeAccess(Reflection.getCallerClass(), SymbolLookup.class, "libraryLookup");
         return libraryLookup(path, RawNativeLibraries::load, arena);

src/java.base/share/classes/jdk/internal/javac/Restricted.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package jdk.internal.javac;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * This annotation is used to mark <em>restricted</em> methods in the Java SE API
+ * (e.g. {@link java.lang.foreign.MemorySegment#reinterpret(long)}).
+ */
+@Target({ElementType.METHOD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Restricted {
+}