270 lines
12 KiB
Java
270 lines
12 KiB
Java
/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8035776 8173587
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* @summary metafactory should fail if instantiatedMethodType does not match sam/bridge descriptors
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*/
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import java.lang.invoke.*;
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import java.util.*;
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public class MetafactoryDescriptorTest {
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static final MethodHandles.Lookup lookup = MethodHandles.lookup();
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static MethodType mt(Class<?> ret, Class<?>... params) {
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return MethodType.methodType(ret, params);
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}
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public interface I {}
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public static class C {
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public static void m_void(String arg) {}
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public static boolean m_boolean(String arg) { return true; }
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public static char m_char(String arg) { return 'x'; }
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public static byte m_byte(String arg) { return 12; }
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public static short m_short(String arg) { return 12; }
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public static int m_int(String arg) { return 12; }
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public static long m_long(String arg) { return 12; }
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public static float m_float(String arg) { return 12; }
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public static double m_double(String arg) { return 12; }
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public static String m_String(String arg) { return ""; }
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public static Integer m_Integer(String arg) { return 23; }
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public static Object m_Object(String arg) { return new Object(); }
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public static String n_boolean(boolean arg) { return ""; }
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public static String n_char(char arg) { return ""; }
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public static String n_byte(byte arg) { return ""; }
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public static String n_short(short arg) { return ""; }
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public static String n_int(int arg) { return ""; }
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public static String n_long(long arg) { return ""; }
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public static String n_float(float arg) { return ""; }
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public static String n_double(double arg) { return ""; }
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public static String n_String(String arg) { return ""; }
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public static String n_Integer(Integer arg) { return ""; }
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public static String n_Object(Object arg) { return ""; }
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public static MethodHandle getM(Class<?> c) {
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try {
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return lookup.findStatic(C.class, "m_" + c.getSimpleName(), mt(c, String.class));
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}
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catch (NoSuchMethodException | IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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}
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public static MethodHandle getN(Class<?> c) {
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if (c == void.class) return null;
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try {
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return lookup.findStatic(C.class, "n_" + c.getSimpleName(), mt(String.class, c));
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}
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catch (NoSuchMethodException | IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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}
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}
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public static void main(String... args) {
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Class<?>[] t = { void.class, boolean.class, char.class,
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byte.class, short.class, int.class, long.class, float.class, double.class,
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String.class, Integer.class, Object.class };
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for (int i = 0; i < t.length; i++) {
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MethodHandle m = C.getM(t[i]);
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MethodHandle n = C.getN(t[i]); // null for void.class
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for (int j = 0; j < t.length; j++) {
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boolean correctRet = t[j].isAssignableFrom(t[i]) || conversions.contains(t[i], t[j]);
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test(correctRet, m, mt(t[i], String.class), mt(t[j], String.class));
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testBridge(correctRet, m, mt(t[i], String.class), mt(t[i], String.class),
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mt(t[j], Object.class));
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testBridge(correctRet, m, mt(t[i], String.class), mt(t[i], String.class),
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mt(t[i], CharSequence.class), mt(t[j], Object.class));
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if (t[i] != void.class && t[j] != void.class) {
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boolean correctParam = t[j].isAssignableFrom(t[i]);
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test(correctParam, n, mt(String.class, t[i]), mt(String.class, t[j]));
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testBridge(correctParam, n, mt(String.class, t[i]), mt(String.class, t[i]),
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mt(Object.class, t[j]));
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testBridge(correctParam, n, mt(String.class, t[i]), mt(String.class, t[i]),
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mt(CharSequence.class, t[i]), mt(Object.class, t[j]));
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}
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}
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}
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}
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static void test(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
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tryMetafactory(correct, mh, instMT, samMT);
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tryAltMetafactory(correct, mh, instMT, samMT);
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}
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static void testBridge(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT, MethodType... bridgeMTs) {
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tryAltMetafactory(correct, mh, instMT, samMT, bridgeMTs);
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}
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static void tryMetafactory(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT) {
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try {
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LambdaMetafactory.metafactory(lookup, "run", mt(I.class),
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samMT, mh, instMT);
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if (!correct) {
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throw new AssertionError("Unexpected linkage without error:" +
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" impl=" + mh +
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", inst=" + instMT +
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", sam=" + samMT);
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}
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}
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catch (LambdaConversionException e) {
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if (correct) {
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throw new AssertionError("Unexpected linkage error:" +
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" e=" + e +
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", impl=" + mh +
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", inst=" + instMT +
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", sam=" + samMT);
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}
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}
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}
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static void tryAltMetafactory(boolean correct, MethodHandle mh, MethodType instMT, MethodType samMT,
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MethodType... bridgeMTs) {
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boolean bridge = bridgeMTs.length > 0;
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Object[] args = new Object[bridge ? 5+bridgeMTs.length : 4];
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args[0] = samMT;
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args[1] = mh;
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args[2] = instMT;
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args[3] = bridge ? LambdaMetafactory.FLAG_BRIDGES : 0;
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if (bridge) {
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args[4] = bridgeMTs.length;
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for (int i = 0; i < bridgeMTs.length; i++) args[5+i] = bridgeMTs[i];
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}
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try {
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LambdaMetafactory.altMetafactory(lookup, "run", mt(I.class), args);
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if (!correct) {
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throw new AssertionError("Unexpected linkage without error:" +
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" impl=" + mh +
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", inst=" + instMT +
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", sam=" + samMT +
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", bridges=" + Arrays.toString(bridgeMTs));
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}
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}
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catch (LambdaConversionException e) {
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if (correct) {
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throw new AssertionError("Unexpected linkage error:" +
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" e=" + e +
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", impl=" + mh +
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", inst=" + instMT +
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", sam=" + samMT +
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", bridges=" + Arrays.toString(bridgeMTs));
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}
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}
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}
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private static class ConversionTable {
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private final Map<Class<?>, Set<Class<?>>> pairs = new HashMap<>();
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public void put(Class<?> from, Class<?> to) {
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Set<Class<?>> set = pairs.computeIfAbsent(from, f -> new HashSet<>());
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set.add(to);
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}
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public boolean contains(Class<?> from, Class<?> to) {
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return pairs.containsKey(from) && pairs.get(from).contains(to);
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}
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}
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private static ConversionTable conversions = new ConversionTable();
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static {
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conversions.put(char.class, int.class);
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conversions.put(char.class, long.class);
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conversions.put(char.class, float.class);
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conversions.put(char.class, double.class);
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conversions.put(char.class, Character.class);
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conversions.put(char.class, Object.class);
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conversions.put(Character.class, char.class);
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conversions.put(Character.class, int.class);
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conversions.put(Character.class, long.class);
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conversions.put(Character.class, float.class);
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conversions.put(Character.class, double.class);
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conversions.put(byte.class, short.class);
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conversions.put(byte.class, int.class);
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conversions.put(byte.class, long.class);
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conversions.put(byte.class, float.class);
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conversions.put(byte.class, double.class);
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conversions.put(byte.class, Byte.class);
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conversions.put(byte.class, Object.class);
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conversions.put(Byte.class, byte.class);
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conversions.put(Byte.class, short.class);
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conversions.put(Byte.class, int.class);
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conversions.put(Byte.class, long.class);
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conversions.put(Byte.class, float.class);
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conversions.put(Byte.class, double.class);
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conversions.put(short.class, int.class);
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conversions.put(short.class, long.class);
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conversions.put(short.class, float.class);
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conversions.put(short.class, double.class);
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conversions.put(short.class, Short.class);
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conversions.put(short.class, Object.class);
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conversions.put(Short.class, short.class);
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conversions.put(Short.class, int.class);
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conversions.put(Short.class, long.class);
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conversions.put(Short.class, float.class);
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conversions.put(Short.class, double.class);
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conversions.put(int.class, long.class);
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conversions.put(int.class, float.class);
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conversions.put(int.class, double.class);
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conversions.put(int.class, Integer.class);
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conversions.put(int.class, Object.class);
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conversions.put(Integer.class, int.class);
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conversions.put(Integer.class, long.class);
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conversions.put(Integer.class, float.class);
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conversions.put(Integer.class, double.class);
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conversions.put(long.class, float.class);
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conversions.put(long.class, double.class);
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conversions.put(long.class, Long.class);
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conversions.put(long.class, Object.class);
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conversions.put(Long.class, long.class);
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conversions.put(Long.class, float.class);
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conversions.put(Long.class, double.class);
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conversions.put(float.class, double.class);
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conversions.put(float.class, Float.class);
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conversions.put(float.class, Object.class);
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conversions.put(Float.class, float.class);
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conversions.put(Float.class, double.class);
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conversions.put(double.class, Double.class);
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conversions.put(double.class, Object.class);
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conversions.put(Double.class, double.class);
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conversions.put(boolean.class, Boolean.class);
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conversions.put(boolean.class, Object.class);
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conversions.put(Boolean.class, boolean.class);
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}
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}
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