131 lines
4.5 KiB
Java
131 lines
4.5 KiB
Java
/*
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* Copyright (c) 2014, 2015, 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 8058828
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* @modules java.base/jdk.internal.org.objectweb.asm
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* java.base/jdk.internal.misc
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*
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* @run main/bootclasspath/othervm -Xbatch compiler.jsr292.VMAnonymousClasses
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*/
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package compiler.jsr292;
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import jdk.internal.misc.Unsafe;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.org.objectweb.asm.Opcodes;
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import java.lang.invoke.ConstantCallSite;
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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.invoke.MutableCallSite;
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import java.lang.invoke.VolatileCallSite;
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public class VMAnonymousClasses {
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static final String TEST_METHOD_NAME = "constant";
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static final Unsafe UNSAFE = Unsafe.getUnsafe();
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static int getConstantPoolSize(byte[] classFile) {
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// The first few bytes:
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// u4 magic;
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// u2 minor_version;
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// u2 major_version;
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// u2 constant_pool_count;
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return ((classFile[8] & 0xFF) << 8) | (classFile[9] & 0xFF);
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}
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static void test(Object value) throws ReflectiveOperationException {
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System.out.printf("Test: %s", value != null ? value.getClass() : "null");
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ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
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cw.visit(Opcodes.V1_8, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER, "Test", null, "java/lang/Object", null);
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MethodVisitor mv = cw.visitMethod(Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC, TEST_METHOD_NAME, "()Ljava/lang/Object;", null, null);
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String placeholder = "CONSTANT";
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int index = cw.newConst(placeholder);
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mv.visitLdcInsn(placeholder);
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mv.visitInsn(Opcodes.ARETURN);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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byte[] classFile = cw.toByteArray();
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Object[] cpPatches = new Object[getConstantPoolSize(classFile)];
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cpPatches[index] = value;
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Class<?> test = UNSAFE.defineAnonymousClass(VMAnonymousClasses.class, classFile, cpPatches);
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Object expectedResult = (value != null) ? value : placeholder;
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for (int i = 0; i<15000; i++) {
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Object result = test.getMethod(TEST_METHOD_NAME).invoke(null);
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if (result != expectedResult) {
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throw new AssertionError(String.format("Wrong value returned: %s != %s", value, result));
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}
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}
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System.out.println(" PASSED");
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}
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public static void main(String[] args) throws ReflectiveOperationException {
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// Objects
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test(new Object());
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test("TEST");
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test(new VMAnonymousClasses());
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test(null);
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// Class
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test(String.class);
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// Arrays
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test(new boolean[0]);
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test(new byte[0]);
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test(new char[0]);
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test(new short[0]);
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test(new int[0]);
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test(new long[0]);
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test(new float[0]);
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test(new double[0]);
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test(new Object[0]);
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// Multi-dimensional arrays
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test(new byte[0][0]);
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test(new Object[0][0]);
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// MethodHandle-related
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MethodType mt = MethodType.methodType(void.class, String[].class);
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MethodHandle mh = MethodHandles.lookup().findStatic(VMAnonymousClasses.class, "main", mt);
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test(mt);
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test(mh);
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test(new ConstantCallSite(mh));
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test(new MutableCallSite(MethodType.methodType(void.class)));
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test(new VolatileCallSite(MethodType.methodType(void.class)));
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System.out.println("TEST PASSED");
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}
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}
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