327 lines
14 KiB
Java
327 lines
14 KiB
Java
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/*
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* Copyright (c) 2013, 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 7087570
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* @summary REF_invokeSpecial DMHs (which are unusual) get marked explicitly; tweak the MHI to use this bit
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*
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* @run main Test7087570
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*/
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import java.lang.invoke.*;
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import java.lang.reflect.*;
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import java.util.*;
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import static java.lang.invoke.MethodHandles.*;
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import static java.lang.invoke.MethodType.*;
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public class Test7087570 {
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// XXX may remove the following constant declarations when MethodHandleInfo is made public
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private static final int
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REF_getField = 1,
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REF_getStatic = 2,
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REF_putField = 3,
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REF_putStatic = 4,
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REF_invokeVirtual = 5,
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REF_invokeStatic = 6,
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REF_invokeSpecial = 7,
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REF_newInvokeSpecial = 8,
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REF_invokeInterface = 9,
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REF_LIMIT = 10;
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private static final TestMethodData[] TESTS = new TestMethodData[] {
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// field accessors
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data(DummyFieldHolder.class, "instanceField", getterMethodType(String.class), DummyFieldHolder.class, REF_getField),
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data(DummyFieldHolder.class, "instanceField", setterMethodType(String.class), DummyFieldHolder.class, REF_putField),
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data(DummyFieldHolder.class, "staticField", getterMethodType(Integer.class), DummyFieldHolder.class, REF_getStatic),
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data(DummyFieldHolder.class, "staticField", setterMethodType(Integer.class), DummyFieldHolder.class, REF_putStatic),
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data(DummyFieldHolder.class, "instanceByteField", getterMethodType(byte.class), DummyFieldHolder.class, REF_getField),
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data(DummyFieldHolder.class, "instanceByteField", setterMethodType(byte.class), DummyFieldHolder.class, REF_putField),
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// REF_invokeVirtual
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data(Object.class, "hashCode", methodType(int.class), Object.class, REF_invokeVirtual),
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// REF_invokeVirtual strength-reduced to REF_invokeSpecial,
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// test if it normalizes back to REF_invokeVirtual in MethodHandleInfo as expected
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data(String.class, "hashCode", methodType(int.class), String.class, REF_invokeVirtual),
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// REF_invokeStatic
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data(Collections.class, "sort", methodType(void.class, List.class), Collections.class, REF_invokeStatic),
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data(Arrays.class, "asList", methodType(List.class, Object[].class), Arrays.class, REF_invokeStatic), // varargs case
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// REF_invokeSpecial
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data(Object.class, "hashCode", methodType(int.class), Object.class, REF_invokeSpecial),
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// REF_newInvokeSpecial
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data(String.class, "<init>", methodType(void.class, char[].class), String.class, REF_newInvokeSpecial),
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data(DummyFieldHolder.class, "<init>", methodType(void.class, byte.class, Long[].class), DummyFieldHolder.class, REF_newInvokeSpecial), // varargs case
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// REF_invokeInterface
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data(List.class, "size", methodType(int.class), List.class, REF_invokeInterface)
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};
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public static void main(String... args) throws Throwable {
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testWithLookup();
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testWithUnreflect();
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}
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private static void doTest(MethodHandle mh, TestMethodData testMethod) {
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Object mhi = newMethodHandleInfo(mh);
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System.out.printf("%s.%s: %s, nominal refKind: %s, actual refKind: %s\n",
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testMethod.clazz.getName(), testMethod.name, testMethod.methodType,
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REF_KIND_NAMES[testMethod.referenceKind],
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REF_KIND_NAMES[getReferenceKind(mhi)]);
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assertEquals(testMethod.name, getName(mhi));
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assertEquals(testMethod.methodType, getMethodType(mhi));
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assertEquals(testMethod.declaringClass, getDeclaringClass(mhi));
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assertEquals(testMethod.referenceKind == REF_invokeSpecial, isInvokeSpecial(mh));
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assertRefKindEquals(testMethod.referenceKind, getReferenceKind(mhi));
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}
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private static void testWithLookup() throws Throwable {
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for (TestMethodData testMethod : TESTS) {
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MethodHandle mh = lookupFrom(testMethod);
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doTest(mh, testMethod);
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}
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}
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private static void testWithUnreflect() throws Throwable {
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for (TestMethodData testMethod : TESTS) {
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MethodHandle mh = unreflectFrom(testMethod);
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doTest(mh, testMethod);
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}
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}
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private static MethodType getterMethodType(Class<?> clazz) {
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return methodType(clazz);
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}
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private static MethodType setterMethodType(Class<?> clazz) {
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return methodType(void.class, clazz);
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}
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private static final String[] REF_KIND_NAMES = {
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"MH::invokeBasic",
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"REF_getField", "REF_getStatic", "REF_putField", "REF_putStatic",
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"REF_invokeVirtual", "REF_invokeStatic", "REF_invokeSpecial",
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"REF_newInvokeSpecial", "REF_invokeInterface"
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};
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private static final Lookup LOOKUP = lookup();
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// XXX may remove the following reflective logic when MethodHandleInfo is made public
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private static final MethodHandle MH_IS_INVOKESPECIAL;
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private static final MethodHandle MHI_CONSTRUCTOR;
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private static final MethodHandle MHI_GET_NAME;
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private static final MethodHandle MHI_GET_METHOD_TYPE;
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private static final MethodHandle MHI_GET_DECLARING_CLASS;
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private static final MethodHandle MHI_GET_REFERENCE_KIND;
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static {
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try {
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// This is white box testing. Use reflection to grab private implementation bits.
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String magicName = "IMPL_LOOKUP";
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Field magicLookup = MethodHandles.Lookup.class.getDeclaredField(magicName);
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// This unit test will fail if a security manager is installed.
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magicLookup.setAccessible(true);
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// Forbidden fruit...
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Lookup directInvokeLookup = (Lookup) magicLookup.get(null);
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Class<?> mhiClass = Class.forName("java.lang.invoke.MethodHandleInfo", false, MethodHandle.class.getClassLoader());
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MH_IS_INVOKESPECIAL = directInvokeLookup
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.findVirtual(MethodHandle.class, "isInvokeSpecial", methodType(boolean.class));
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MHI_CONSTRUCTOR = directInvokeLookup
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.findConstructor(mhiClass, methodType(void.class, MethodHandle.class));
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MHI_GET_NAME = directInvokeLookup
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.findVirtual(mhiClass, "getName", methodType(String.class));
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MHI_GET_METHOD_TYPE = directInvokeLookup
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.findVirtual(mhiClass, "getMethodType", methodType(MethodType.class));
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MHI_GET_DECLARING_CLASS = directInvokeLookup
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.findVirtual(mhiClass, "getDeclaringClass", methodType(Class.class));
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MHI_GET_REFERENCE_KIND = directInvokeLookup
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.findVirtual(mhiClass, "getReferenceKind", methodType(int.class));
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} catch (ReflectiveOperationException ex) {
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throw new Error(ex);
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}
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}
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private static class TestMethodData {
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final Class<?> clazz;
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final String name;
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final MethodType methodType;
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final Class<?> declaringClass;
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final int referenceKind; // the nominal refKind
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public TestMethodData(Class<?> clazz, String name,
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MethodType methodType, Class<?> declaringClass,
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int referenceKind) {
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this.clazz = clazz;
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this.name = name;
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this.methodType = methodType;
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this.declaringClass = declaringClass;
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this.referenceKind = referenceKind;
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}
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}
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private static TestMethodData data(Class<?> clazz, String name,
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MethodType methodType, Class<?> declaringClass,
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int referenceKind) {
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return new TestMethodData(clazz, name, methodType, declaringClass, referenceKind);
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}
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private static MethodHandle lookupFrom(TestMethodData testMethod)
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throws NoSuchMethodException, NoSuchFieldException, IllegalAccessException {
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switch (testMethod.referenceKind) {
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case REF_getField:
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return LOOKUP.findGetter(testMethod.clazz, testMethod.name, testMethod.methodType.returnType());
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case REF_putField:
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return LOOKUP.findSetter(testMethod.clazz, testMethod.name, testMethod.methodType.parameterType(0));
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case REF_getStatic:
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return LOOKUP.findStaticGetter(testMethod.clazz, testMethod.name, testMethod.methodType.returnType());
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case REF_putStatic:
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return LOOKUP.findStaticSetter(testMethod.clazz, testMethod.name, testMethod.methodType.parameterType(0));
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case REF_invokeVirtual:
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case REF_invokeInterface:
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return LOOKUP.findVirtual(testMethod.clazz, testMethod.name, testMethod.methodType);
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case REF_invokeStatic:
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return LOOKUP.findStatic(testMethod.clazz, testMethod.name, testMethod.methodType);
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case REF_invokeSpecial:
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Class<?> thisClass = LOOKUP.lookupClass();
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return LOOKUP.findSpecial(testMethod.clazz, testMethod.name, testMethod.methodType, thisClass);
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case REF_newInvokeSpecial:
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return LOOKUP.findConstructor(testMethod.clazz, testMethod.methodType);
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default:
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throw new Error("ERROR: unexpected referenceKind in test data");
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}
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}
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private static MethodHandle unreflectFrom(TestMethodData testMethod)
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throws NoSuchMethodException, NoSuchFieldException, IllegalAccessException {
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switch (testMethod.referenceKind) {
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case REF_getField:
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case REF_getStatic: {
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Field f = testMethod.clazz.getDeclaredField(testMethod.name);
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return LOOKUP.unreflectGetter(f);
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}
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case REF_putField:
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case REF_putStatic: {
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Field f = testMethod.clazz.getDeclaredField(testMethod.name);
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return LOOKUP.unreflectSetter(f);
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}
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case REF_invokeVirtual:
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case REF_invokeStatic:
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case REF_invokeInterface: {
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Method m = testMethod.clazz.getDeclaredMethod(testMethod.name, testMethod.methodType.parameterArray());
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return LOOKUP.unreflect(m);
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}
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case REF_invokeSpecial: {
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Method m = testMethod.clazz.getDeclaredMethod(testMethod.name, testMethod.methodType.parameterArray());
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Class<?> thisClass = LOOKUP.lookupClass();
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return LOOKUP.unreflectSpecial(m, thisClass);
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}
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case REF_newInvokeSpecial: {
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Constructor c = testMethod.clazz.getDeclaredConstructor(testMethod.methodType.parameterArray());
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return LOOKUP.unreflectConstructor(c);
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}
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default:
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throw new Error("ERROR: unexpected referenceKind in test data");
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}
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}
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private static Object newMethodHandleInfo(MethodHandle mh) {
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try {
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return MHI_CONSTRUCTOR.invoke(mh);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static boolean isInvokeSpecial(MethodHandle mh) {
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try {
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return (boolean) MH_IS_INVOKESPECIAL.invokeExact(mh);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static String getName(Object mhi) {
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try {
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return (String) MHI_GET_NAME.invoke(mhi);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static MethodType getMethodType(Object mhi) {
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try {
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return (MethodType) MHI_GET_METHOD_TYPE.invoke(mhi);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static Class<?> getDeclaringClass(Object mhi) {
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try {
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return (Class<?>) MHI_GET_DECLARING_CLASS.invoke(mhi);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static int getReferenceKind(Object mhi) {
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try {
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return (int) MHI_GET_REFERENCE_KIND.invoke(mhi);
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} catch (Throwable ex) {
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throw new Error(ex);
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}
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}
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private static void assertRefKindEquals(int expect, int observed) {
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if (expect == observed) return;
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String msg = "expected " + REF_KIND_NAMES[(int) expect] +
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" but observed " + REF_KIND_NAMES[(int) observed];
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System.out.println("FAILED: " + msg);
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throw new AssertionError(msg);
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}
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private static void assertEquals(Object expect, Object observed) {
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if (java.util.Objects.equals(expect, observed)) return;
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String msg = "expected " + expect + " but observed " + observed;
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System.out.println("FAILED: " + msg);
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throw new AssertionError(msg);
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}
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}
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class DummyFieldHolder {
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public static Integer staticField;
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public String instanceField;
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public byte instanceByteField;
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public DummyFieldHolder(byte unused1, Long... unused2) {
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}
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}
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