TestANewArray.java revision 11833:1cbffa2beba6 
1/*
2 * Copyright (c) 2014, 2016, 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
24import java.io.File;
25import java.io.FileOutputStream;
26
27import jdk.internal.org.objectweb.asm.ClassWriter;
28import jdk.internal.org.objectweb.asm.MethodVisitor;
29import static jdk.internal.org.objectweb.asm.Opcodes.*;
30
31import jdk.test.lib.process.ProcessTools;
32import jdk.test.lib.process.OutputAnalyzer;
33
34/*
35 * @test
36 * @summary Test that anewarray bytecode is valid only if it specifies 255 or fewer dimensions.
37 * @library /test/lib
38 * @modules java.base/jdk.internal.org.objectweb.asm
39 *          java.base/jdk.internal.misc
40 *          java.management
41 * @compile -XDignore.symbol.file TestANewArray.java
42 * @run main/othervm TestANewArray 49
43 * @run main/othervm TestANewArray 50
44 * @run main/othervm TestANewArray 51
45 * @run main/othervm TestANewArray 52
46 */
47
48/*
49 * Testing anewarray instruction with 254, 255 & 264 dimensions to verify JVMS 8,
50 * Section 4.9.1, Static Constraints that states the following:
51 *
52 * "No anewarray instruction may be used to create an array of more than 255 dimensions."
53 *
54 */
55
56public class TestANewArray {
57
58    static String classCName = null; // the generated class name
59
60    static final int test_Dimension_254 = 254; // should always pass
61    static final int test_Dimension_255 = 255; // should always pass, except for cfv 49
62    static final int test_Dimension_264 = 264; // should always fail
63
64    static final String array_Dimension_254 = genArrayDim(test_Dimension_254);
65    static final String array_Dimension_255 = genArrayDim(test_Dimension_255);
66    static final String array_Dimension_264 = genArrayDim(test_Dimension_264);
67
68    public static void main(String... args) throws Exception {
69        int cfv = Integer.parseInt(args[0]);
70
71        // 254 array dimensions
72        byte[] classFile_254 = dumpClassFile(cfv, test_Dimension_254, array_Dimension_254);
73        writeClassFileFromByteArray(classFile_254);
74        System.err.println("Running with cfv: " + cfv + ", test_Dimension_254");
75        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".",  classCName);
76        OutputAnalyzer output = new OutputAnalyzer(pb.start());
77        output.shouldNotContain("java.lang.VerifyError");
78        output.shouldHaveExitValue(0);
79
80        // 255 array dimensions
81        byte[] classFile_255 = dumpClassFile(cfv, test_Dimension_255, array_Dimension_255);
82        writeClassFileFromByteArray(classFile_255);
83        System.err.println("Running with cfv: " + cfv + ", test_Dimension_255");
84        pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".",  classCName);
85        output = new OutputAnalyzer(pb.start());
86        if (cfv == 49) {
87            // The type-inferencing verifier used for <=49.0 ClassFiles detects an anewarray instruction
88            // with exactly 255 dimensions and incorrectly issues the "Array with too many dimensions" VerifyError.
89            output.shouldContain("Array with too many dimensions");
90            output.shouldHaveExitValue(1);
91        } else {
92            // 255 dimensions should always pass, except for cfv 49
93            output.shouldNotContain("java.lang.VerifyError");
94            output.shouldNotContain("java.lang.ClassFormatError");
95            output.shouldHaveExitValue(0);
96        }
97
98        // 264 array dimensions
99        byte[] classFile_264 = dumpClassFile(cfv, test_Dimension_264, array_Dimension_264);
100        writeClassFileFromByteArray(classFile_264);
101        System.err.println("Running with cfv: " + cfv + ", test_Dimension_264");
102        pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".",  classCName);
103        output = new OutputAnalyzer(pb.start());
104        output.shouldContain("java.lang.ClassFormatError");
105        output.shouldHaveExitValue(1);
106    }
107
108    public static byte[] dumpClassFile(int cfv, int testDimension264, String arrayDim) throws Exception {
109        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
110        MethodVisitor mv;
111
112        classCName = "classCName_" + cfv + "_" + testDimension264;
113
114        cw.visit(cfv, ACC_PUBLIC + ACC_SUPER, classCName, null, "java/lang/Object", null);
115        {
116            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
117            mv.visitCode();
118            mv.visitVarInsn(ALOAD, 0);
119            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
120            mv.visitInsn(RETURN);
121            mv.visitMaxs(1, 1);
122            mv.visitEnd();
123        }
124        {   // classCName main method
125            mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
126            mv.visitCode();
127            mv.visitIntInsn(BIPUSH, 1);
128            mv.visitTypeInsn(ANEWARRAY, arrayDim); // Test ANEWARRAY bytecode with various dimensions
129            mv.visitInsn(RETURN);
130            mv.visitMaxs(2, 2);
131            mv.visitEnd();
132        }
133        cw.visitEnd();
134        return cw.toByteArray();
135    }
136
137    public static FileOutputStream writeClassFileFromByteArray(byte[] classFileByteArray) throws Exception {
138        FileOutputStream fos = new FileOutputStream(new File(classCName + ".class"));
139        fos.write(classFileByteArray);
140        fos.close();
141        return fos;
142    }
143
144    private static String genArrayDim(int testDim) {
145        StringBuilder array_Dimension = new StringBuilder();
146        for (int i = 0; i < testDim; i++)
147        {
148            array_Dimension.append("[");
149        }
150        return array_Dimension.append("Ljava/lang/Object;").toString();
151    }
152}
153