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91 lines
3.4 KiB
Java
91 lines
3.4 KiB
Java
/*
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* Copyright (c) 2021, 2025, 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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/* @test
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* @bug 8265079
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* @run junit/othervm -Xverify:all TestVHInvokerCaching
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*/
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.VarHandle;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.List;
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import static java.lang.invoke.MethodHandles.lookup;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertSame;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.MethodSource;
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public class TestVHInvokerCaching {
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@ParameterizedTest
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@MethodSource("testHandles")
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public void testVHIInvokerCaching(VarHandle testHandle) throws Throwable {
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for (VarHandle.AccessMode mode : VarHandle.AccessMode.values()) {
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MethodHandle handle1 = MethodHandles.varHandleInvoker(mode, testHandle.accessModeType(mode));
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MethodHandle handle2 = MethodHandles.varHandleInvoker(mode, testHandle.accessModeType(mode));
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assertSame(handle1, handle2);
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}
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for (VarHandle.AccessMode mode : VarHandle.AccessMode.values()) {
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MethodHandle handle1 = MethodHandles.varHandleExactInvoker(mode, testHandle.accessModeType(mode));
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MethodHandle handle2 = MethodHandles.varHandleExactInvoker(mode, testHandle.accessModeType(mode));
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assertSame(handle1, handle2);
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}
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}
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public static Object[][] testHandles() throws NoSuchFieldException, IllegalAccessException {
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List<VarHandle> testHandles = new ArrayList<>();
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class Holder {
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byte f_byte;
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short f_short;
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char f_char;
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int f_int;
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long f_long;
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float f_float;
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double f_double;
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Object f_Object;
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String f_String;
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}
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MethodHandles.Lookup lookup = lookup();
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for (Field field : Holder.class.getDeclaredFields()) {
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String fieldName = field.getName();
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Class<?> fieldType = field.getType();
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testHandles.add(MethodHandles.arrayElementVarHandle(fieldType.arrayType()));
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testHandles.add(lookup.findVarHandle(Holder.class, fieldName, fieldType));
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}
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assertFalse(testHandles.isEmpty());
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return testHandles.stream().map(vh -> new Object[]{ vh }).toArray(Object[][]::new);
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}
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}
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