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
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.process.ProcessTools;
32 import 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
56 public 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 }