1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @library /testlibrary 27 * @compile -XDignore.symbol.file UnsupportedClassFileVersion.java 28 * @run main UnsupportedClassFileVersion 29 */ 30 31 import java.io.File; 32 import java.io.FileOutputStream; 33 import jdk.internal.org.objectweb.asm.ClassWriter; 34 import jdk.internal.org.objectweb.asm.MethodVisitor; 35 import jdk.internal.org.objectweb.asm.Opcodes; 36 import com.oracle.java.testlibrary.*; 37 38 public class UnsupportedClassFileVersion implements Opcodes { 39 public static void main(String... args) throws Exception { 40 writeClassFile(); 41 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-cp", ".", "ClassFile"); 42 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 43 output.shouldContain("ClassFile has been compiled by a more recent Java version (class file version 99.0), " + 44 "this Java version only recognizes class file versions up to " + 45 System.getProperty("java.class.version")); 46 47 output.shouldHaveExitValue(1); 48 } 49 50 public static void writeClassFile() throws Exception { 51 ClassWriter cw = new ClassWriter(0); 52 MethodVisitor mv; 53 54 cw.visit(99, ACC_PUBLIC + ACC_SUPER, "ClassFile", null, "java/lang/Object", null); 55 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); 56 mv.visitCode(); 57 mv.visitVarInsn(ALOAD, 0); 58 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); 59 mv.visitInsn(RETURN); 60 mv.visitMaxs(1, 1); 61 mv.visitEnd(); 62 cw.visitEnd(); 63 64 try (FileOutputStream fos = new FileOutputStream(new File("ClassFile.class"))) { 65 fos.write(cw.toByteArray()); 66 } 67 } 68 }