70 lines
3.1 KiB
Java
70 lines
3.1 KiB
Java
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/*
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* Copyright (c) 2013, 2018, 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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package vm.runtime.defmeth.shared;
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import vm.runtime.defmeth.shared.data.method.body.CallMethod;
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import vm.runtime.defmeth.shared.executor.MHInvokeWithArgsTest;
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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.MethodType;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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/**
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* Encapsulates test context and provides utility methods to invoke methods
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* in that context through reflection. Should be loaded in the same class loader as all other test classes.
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* It is needed for correct resolution of initiating class loader in case of reflection invocation scenario.
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*/
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public class TestContext {
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public static Object invoke(Method m, Object obj, Object... args)
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throws InvocationTargetException, IllegalAccessException
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{
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return m.invoke(obj, args);
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}
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public static Object invokeWithArguments(CallMethod.Invoke invokeType, Class<?> declaringClass,
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String methodName, MethodType type, Object... arguments) throws Throwable {
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// Need to do method lookup in the right context
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// Otherwise, ClassNotFoundException is thrown
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MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
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MethodHandle mh;
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// FYI: can't use switch over enum here, because to implement it javac produces auxiliary class TestContext$1
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// and it can't be accessed from the context where TestContext is loaded
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if (invokeType == CallMethod.Invoke.VIRTUAL || invokeType == CallMethod.Invoke.INTERFACE) {
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mh = LOOKUP.findVirtual(declaringClass, methodName, type);
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} else if (invokeType == CallMethod.Invoke.SPECIAL) {
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mh = LOOKUP.findSpecial(declaringClass, methodName, type, declaringClass);
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} else if (invokeType == CallMethod.Invoke.STATIC) {
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mh = LOOKUP.findStatic(declaringClass, methodName, type);
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} else {
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throw new Error("Unknown invoke instruction: "+invokeType);
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}
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return mh.invokeWithArguments(arguments);
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}
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}
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