1 /*
2 * Copyright (c) 2014, 2015, 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 import java.io.File;
25 import java.io.FileOutputStream;
26
27 import jdk.internal.org.objectweb.asm.ClassWriter;
28 import jdk.internal.org.objectweb.asm.MethodVisitor;
29 import static jdk.internal.org.objectweb.asm.Opcodes.*;
30
31 import jdk.test.lib.*;
32
33 /*
34 * @test
35 * @summary Test that anewarray bytecode is valid only if it specifies 255 or fewer dimensions.
36 * @library /testlibrary
37 * @modules java.base/jdk.internal.org.objectweb.asm
38 * java.base/jdk.internal.misc
39 * java.management
40 * @compile -XDignore.symbol.file TestANewArray.java
41 * @run main/othervm TestANewArray 49
42 * @run main/othervm TestANewArray 50
43 * @run main/othervm TestANewArray 51
44 * @run main/othervm TestANewArray 52
45 */
46
47 /*
48 * Testing anewarray instruction with 254, 255 & 264 dimensions to verify JVMS 8,
49 * Section 4.9.1, Static Constraints that states the following:
50 *
51 * "No anewarray instruction may be used to create an array of more than 255 dimensions."
52 *
53 */
54
55 public class TestANewArray {
56
57 static String classCName = null; // the generated class name
58
59 static final int test_Dimension_254 = 254; // should always pass
60 static final int test_Dimension_255 = 255; // should always pass, except for cfv 49
61 static final int test_Dimension_264 = 264; // should always fail
62
63 static final String array_Dimension_254 = genArrayDim(test_Dimension_254);
64 static final String array_Dimension_255 = genArrayDim(test_Dimension_255);
65 static final String array_Dimension_264 = genArrayDim(test_Dimension_264);
66
67 public static void main(String... args) throws Exception {
68 int cfv = Integer.parseInt(args[0]);
69
70 // 254 array dimensions
71 byte[] classFile_254 = dumpClassFile(cfv, test_Dimension_254, array_Dimension_254);
72 writeClassFileFromByteArray(classFile_254);
73 System.err.println("Running with cfv: " + cfv + ", test_Dimension_254");
74 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".", classCName);
75 OutputAnalyzer output = new OutputAnalyzer(pb.start());
76 output.shouldNotContain("java.lang.VerifyError");
77 output.shouldHaveExitValue(0);
78
79 // 255 array dimensions
80 byte[] classFile_255 = dumpClassFile(cfv, test_Dimension_255, array_Dimension_255);
81 writeClassFileFromByteArray(classFile_255);
82 System.err.println("Running with cfv: " + cfv + ", test_Dimension_255");
83 pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".", classCName);
84 output = new OutputAnalyzer(pb.start());
85 if (cfv == 49) {
86 // The type-inferencing verifier used for <=49.0 ClassFiles detects an anewarray instruction
87 // with exactly 255 dimensions and incorrectly issues the "Array with too many dimensions" VerifyError.
88 output.shouldContain("Array with too many dimensions");
89 output.shouldHaveExitValue(1);
90 } else {
91 // 255 dimensions should always pass, except for cfv 49
92 output.shouldNotContain("java.lang.VerifyError");
93 output.shouldNotContain("java.lang.ClassFormatError");
94 output.shouldHaveExitValue(0);
95 }
96
97 // 264 array dimensions
98 byte[] classFile_264 = dumpClassFile(cfv, test_Dimension_264, array_Dimension_264);
99 writeClassFileFromByteArray(classFile_264);
100 System.err.println("Running with cfv: " + cfv + ", test_Dimension_264");
101 pb = ProcessTools.createJavaProcessBuilder(true, "-verify", "-cp", ".", classCName);
102 output = new OutputAnalyzer(pb.start());
103 output.shouldContain("java.lang.ClassFormatError");
104 output.shouldHaveExitValue(1);
105 }
106
107 public static byte[] dumpClassFile(int cfv, int testDimension264, String arrayDim) throws Exception {
108 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
109 MethodVisitor mv;
110
111 classCName = "classCName_" + cfv + "_" + testDimension264;
112
113 cw.visit(cfv, ACC_PUBLIC + ACC_SUPER, classCName, null, "java/lang/Object", null);
114 {
115 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
116 mv.visitCode();
117 mv.visitVarInsn(ALOAD, 0);
118 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
119 mv.visitInsn(RETURN);
120 mv.visitMaxs(1, 1);
121 mv.visitEnd();
122 }
123 { // classCName main method
124 mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
125 mv.visitCode();
126 mv.visitIntInsn(BIPUSH, 1);
127 mv.visitTypeInsn(ANEWARRAY, arrayDim); // Test ANEWARRAY bytecode with various dimensions
128 mv.visitInsn(RETURN);
129 mv.visitMaxs(2, 2);
130 mv.visitEnd();
131 }
132 cw.visitEnd();
133 return cw.toByteArray();
134 }
135
136 public static FileOutputStream writeClassFileFromByteArray(byte[] classFileByteArray) throws Exception {
137 FileOutputStream fos = new FileOutputStream(new File(classCName + ".class"));
138 fos.write(classFileByteArray);
139 fos.close();
140 return fos;
141 }
142
143 private static String genArrayDim(int testDim) {
144 StringBuilder array_Dimension = new StringBuilder();
145 for (int i = 0; i < testDim; i++)
146 {
147 array_Dimension.append("[");
148 }
149 return array_Dimension.append("Ljava/lang/Object;").toString();
150 }
151 }