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