| /* |
| * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| |
| import jdk.internal.org.objectweb.asm.ClassWriter; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import static jdk.internal.org.objectweb.asm.Opcodes.*; |
| |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| |
| /* |
| * @test |
| * @summary Test that anewarray bytecode is valid only if it specifies 254 or fewer dimensions. |
| * 255 is invalid because the anewarray would then create an array with 256 dimensions. |
| * @library /test/lib |
| * @modules java.base/jdk.internal.org.objectweb.asm |
| * @compile -XDignore.symbol.file TestANewArray.java |
| * @run main/othervm TestANewArray 49 |
| * @run main/othervm TestANewArray 52 |
| */ |
| |
| /* |
| * Testing anewarray instruction with 254, 255 & 264 dimensions to verify JVM Spec |
| * Section 4.9.1, Static Constraints that states the following: |
| * |
| * "No anewarray instruction may be used to create an array of more than 255 dimensions." |
| * |
| */ |
| |
| public class TestANewArray { |
| |
| static String classCName = null; // the generated class name |
| |
| static final int test_Dimension_254 = 254; // should always pass |
| static final int test_Dimension_255 = 255; // should always pass, except for cfv 49 |
| static final int test_Dimension_264 = 264; // should always fail |
| |
| static final String array_Dimension_254 = genArrayDim(test_Dimension_254); |
| static final String array_Dimension_255 = genArrayDim(test_Dimension_255); |
| static final String array_Dimension_264 = genArrayDim(test_Dimension_264); |
| |
| public static void main(String... args) throws Exception { |
| int cfv = Integer.parseInt(args[0]); |
| |
| // 254 array dimensions |
| byte[] classFile_254 = dumpClassFile(cfv, test_Dimension_254, array_Dimension_254); |
| writeClassFileFromByteArray(classFile_254); |
| System.err.println("Running with cfv: " + cfv + ", test_Dimension_254"); |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".", classCName); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldNotContain("java.lang.VerifyError"); |
| output.shouldHaveExitValue(0); |
| |
| // 255 array dimensions |
| byte[] classFile_255 = dumpClassFile(cfv, test_Dimension_255, array_Dimension_255); |
| writeClassFileFromByteArray(classFile_255); |
| System.err.println("Running with cfv: " + cfv + ", test_Dimension_255"); |
| pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".", classCName); |
| output = new OutputAnalyzer(pb.start()); |
| // If anewarray has an operand with 255 array dimensions then VerifyError should |
| // be thrown because the resulting array would have 256 dimensions. |
| output.shouldContain("java.lang.VerifyError"); |
| // VerifyError exception messages differ between verifiers. |
| if (cfv == 49) { |
| output.shouldContain("Array with too many dimensions"); |
| } else { |
| output.shouldContain("Illegal anewarray instruction, array has more than 255 dimensions"); |
| } |
| output.shouldHaveExitValue(1); |
| |
| // 264 array dimensions |
| byte[] classFile_264 = dumpClassFile(cfv, test_Dimension_264, array_Dimension_264); |
| writeClassFileFromByteArray(classFile_264); |
| System.err.println("Running with cfv: " + cfv + ", test_Dimension_264"); |
| pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".", classCName); |
| output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("java.lang.ClassFormatError"); |
| output.shouldHaveExitValue(1); |
| } |
| |
| public static byte[] dumpClassFile(int cfv, int testDimension264, String arrayDim) throws Exception { |
| ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES); |
| MethodVisitor mv; |
| |
| classCName = "classCName_" + cfv + "_" + testDimension264; |
| |
| cw.visit(cfv, ACC_PUBLIC + ACC_SUPER, classCName, null, "java/lang/Object", null); |
| { |
| mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
| mv.visitCode(); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); |
| mv.visitInsn(RETURN); |
| mv.visitMaxs(1, 1); |
| mv.visitEnd(); |
| } |
| { // classCName main method |
| mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); |
| mv.visitCode(); |
| mv.visitIntInsn(BIPUSH, 1); |
| mv.visitTypeInsn(ANEWARRAY, arrayDim); // Test ANEWARRAY bytecode with various dimensions |
| mv.visitInsn(RETURN); |
| mv.visitMaxs(2, 2); |
| mv.visitEnd(); |
| } |
| cw.visitEnd(); |
| return cw.toByteArray(); |
| } |
| |
| public static FileOutputStream writeClassFileFromByteArray(byte[] classFileByteArray) throws Exception { |
| FileOutputStream fos = new FileOutputStream(new File(classCName + ".class")); |
| fos.write(classFileByteArray); |
| fos.close(); |
| return fos; |
| } |
| |
| private static String genArrayDim(int testDim) { |
| StringBuilder array_Dimension = new StringBuilder(); |
| for (int i = 0; i < testDim; i++) |
| { |
| array_Dimension.append("["); |
| } |
| return array_Dimension.append("Ljava/lang/Object;").toString(); |
| } |
| } |