1 /*
2 * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @modules java.base/jdk.internal.javac
27 * @modules java.base/jdk.internal.reflect
28 * @run testng TestRestricted
29 */
30
31 import jdk.internal.javac.Restricted;
32 import jdk.internal.reflect.CallerSensitive;
33 import org.testng.annotations.Test;
34
35 import java.io.IOException;
36 import java.io.UncheckedIOException;
37 import java.lang.foreign.AddressLayout;
38 import java.lang.foreign.Arena;
39 import java.lang.foreign.FunctionDescriptor;
40 import java.lang.foreign.Linker;
41 import java.lang.foreign.MemoryLayout;
42 import java.lang.foreign.MemorySegment;
43 import java.lang.foreign.SymbolLookup;
44 import java.lang.invoke.MethodHandle;
45 import java.lang.invoke.MethodType;
46 import java.lang.module.ModuleReader;
47 import java.lang.module.ModuleReference;
48 import java.lang.reflect.Method;
49 import java.lang.reflect.Modifier;
50 import java.nio.file.Path;
51 import java.util.Arrays;
52 import java.util.HashSet;
53 import java.util.List;
54 import java.util.Set;
55 import java.util.StringJoiner;
56 import java.util.function.Consumer;
57 import java.util.stream.Collectors;
58 import java.util.stream.Stream;
59
60 import static org.testng.Assert.assertTrue;
61 import static org.testng.Assert.fail;
62
63 /**
64 * This test checks all methods in java.base to make sure that methods annotated with {@link Restricted} are
65 * expected restricted methods. Conversely, the test also checks that there is no expected restricted method
66 * that is not marked with the annotation. For each restricted method, we also check that they are
67 * marked with the {@link CallerSensitive} annotation.
68 */
69 public class TestRestricted {
70
71 record RestrictedMethod(Class<?> owner, String name, MethodType type) {
72 static RestrictedMethod from(Method method) {
73 return of(method.getDeclaringClass(), method.getName(), method.getReturnType(), method.getParameterTypes());
74 }
75
76 static RestrictedMethod of(Class<?> owner, String name, Class<?> returnType, Class<?>... paramTypes) {
77 return new RestrictedMethod(owner, name, MethodType.methodType(returnType, paramTypes));
78 }
79 };
80
81 static final Set<RestrictedMethod> RESTRICTED_METHODS = Set.of(
82 RestrictedMethod.of(SymbolLookup.class, "libraryLookup", SymbolLookup.class, String.class, Arena.class),
83 RestrictedMethod.of(SymbolLookup.class, "libraryLookup", SymbolLookup.class, Path.class, Arena.class),
84 RestrictedMethod.of(Linker.class, "downcallHandle", MethodHandle.class, FunctionDescriptor.class, Linker.Option[].class),
85 RestrictedMethod.of(Linker.class, "downcallHandle", MethodHandle.class, MemorySegment.class, FunctionDescriptor.class, Linker.Option[].class),
86 RestrictedMethod.of(Linker.class, "upcallStub", MemorySegment.class, MethodHandle.class, FunctionDescriptor.class, Arena.class, Linker.Option[].class),
87 RestrictedMethod.of(MemorySegment.class, "reinterpret", MemorySegment.class, long.class),
88 RestrictedMethod.of(MemorySegment.class, "reinterpret", MemorySegment.class, Arena.class, Consumer.class),
89 RestrictedMethod.of(MemorySegment.class, "reinterpret", MemorySegment.class, long.class, Arena.class, Consumer.class),
90 RestrictedMethod.of(AddressLayout.class, "withTargetLayout", AddressLayout.class, MemoryLayout.class),
91 RestrictedMethod.of(ModuleLayer.Controller.class, "enableNativeAccess", ModuleLayer.Controller.class, Module.class),
92 RestrictedMethod.of(System.class, "load", void.class, String.class),
93 RestrictedMethod.of(System.class, "loadLibrary", void.class, String.class),
94 RestrictedMethod.of(Runtime.class, "load", void.class, String.class),
95 RestrictedMethod.of(Runtime.class, "loadLibrary", void.class, String.class)
96 );
97
98 @Test
99 public void testRestricted() {
100 Set<RestrictedMethod> restrictedMethods = new HashSet<>(RESTRICTED_METHODS);
101 restrictedMethods(Object.class.getModule()).forEach(m -> checkRestrictedMethod(m, restrictedMethods));
102 if (!restrictedMethods.isEmpty()) {
103 fail("@Restricted annotation not found for methods: " + restrictedMethods);
104 }
105 }
106
107 void checkRestrictedMethod(Method meth, Set<RestrictedMethod> restrictedMethods) {
108 String sig = meth.getDeclaringClass().getName() + "::" + shortSig(meth);
109 boolean expectRestricted = restrictedMethods.remove(RestrictedMethod.from(meth));
110 assertTrue(expectRestricted, "unexpected @Restricted annotation found on method " + sig);
111 assertTrue(meth.isAnnotationPresent(CallerSensitive.class), "@CallerSensitive annotation not found on restricted method " + sig);
112 }
113
114 /**
115 * Returns a stream of all restricted methods on public classes in packages
116 * exported by a named module. This logic is borrowed from CallerSensitiveTest.
117 */
118 static Stream<Method> restrictedMethods(Module module) {
119 assert module.isNamed();
120 ModuleReference mref = module.getLayer().configuration()
121 .findModule(module.getName())
122 .orElseThrow(() -> new RuntimeException())
123 .reference();
124 // find all ".class" resources in the module
125 // transform the resource name to a class name
126 // load every class in the exported packages
127 // return the restricted methods of the public classes
128 try (ModuleReader reader = mref.open()) {
129 return reader.list()
130 .filter(rn -> rn.endsWith(".class"))
131 .map(rn -> rn.substring(0, rn.length() - 6)
132 .replace('/', '.'))
133 .filter(cn -> module.isExported(packageName(cn)))
134 .map(cn -> Class.forName(module, cn))
135 .filter(refc -> refc != null
136 && Modifier.isPublic(refc.getModifiers()))
137 .map(refc -> restrictedMethods(refc))
138 .flatMap(List::stream);
139 } catch (IOException ioe) {
140 throw new UncheckedIOException(ioe);
141 }
142 }
143
144 static String packageName(String cn) {
145 int last = cn.lastIndexOf('.');
146 if (last > 0) {
147 return cn.substring(0, last);
148 } else {
149 return "";
150 }
151 }
152
153 static String shortSig(Method m) {
154 StringJoiner sj = new StringJoiner(",", m.getName() + "(", ")");
155 for (Class<?> parameterType : m.getParameterTypes()) {
156 sj.add(parameterType.getTypeName());
157 }
158 return sj.toString();
159 }
160
161 /**
162 * Returns a list of restricted methods directly declared by the given
163 * class.
164 */
165 static List<Method> restrictedMethods(Class<?> refc) {
166 return Arrays.stream(refc.getDeclaredMethods())
167 .filter(m -> m.isAnnotationPresent(Restricted.class))
168 .collect(Collectors.toList());
169 }
170 }