1 /*
2 * Copyright (c) 2007, 2019, 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
25 /**
26 * @test
27 * @bug 6547378
28 * @summary Verify that methods with max_stack==0 don't have exception handlers
29 * @author Keith McGuigan
30 */
31
32 public class VerifyStackForExceptionHandlers extends ClassLoader {
33 public static void main(String argv[]) throws Exception {
34 VerifyStackForExceptionHandlers t =
35 new VerifyStackForExceptionHandlers();
36
37 try {
38 t.loadGoodClass();
39 } catch(VerifyError e) {
40 throw new Exception("FAIL: should be no VerifyError for class A");
41 }
42
43 try {
44 t.loadBadClass();
45 throw new Exception("FAIL: should be a VerifyError for class B");
46 } catch(VerifyError e) {
47 System.out.println("PASS");
48 }
49 }
50
51 private void loadGoodClass() {
52 /* -- code for class A --
53 public class A {
54 public static void f() {}
55 }
56 */
57 long[] cls_data = {
58 0xcafebabe00000031L, 0x000e0a0003000b07L,
59 0x000c07000d010006L, 0x3c696e69743e0100L,
60 0x0328295601000443L, 0x6f646501000f4c69L,
61 0x6e654e756d626572L, 0x5461626c65010001L,
62 0x6601000a536f7572L, 0x636546696c650100L,
63 0x06412e6a6176610cL, 0x0004000501000141L,
64 0x0100106a6176612fL, 0x6c616e672f4f626aL,
65 0x6563740021000200L, 0x0300000000000200L,
66 0x0100040005000100L, 0x060000001d000100L,
67 0x01000000052ab700L, 0x01b1000000010007L,
68 0x0000000600010000L, 0x0001000900080005L,
69 0x0001000600000019L, 0x0000000000000001L,
70 0xb100000001000700L, 0x0000060001000000L,
71 0x0200010009000000L, 0x02000a0000000000L
72 };
73 final int EXTRA = 5;
74
75 byte cf_bytes[] = toByteArray(cls_data);
76 Class c = defineClass("A", cf_bytes, 0, cf_bytes.length - EXTRA);
77
78 try { c.newInstance(); } // to force linking, thus verification
79 catch(InstantiationException e) {}
80 catch(IllegalAccessException e) {}
81 }
82
83 private void loadBadClass() throws VerifyError {
84 /* -- code for class B --
85 public class B {
86 public static void g() {}
87 public static void f() {
88 // bytecode modified to have a max_stack value of 0
89 try { g(); }
90 catch (NullPointerException e) {}
91 }
92 }
93 */
94 long[] cls_data = {
95 0xcafebabe00000031L, 0x00120a000400060aL,
96 0x000d00030c000f00L, 0x0a0700050100106aL,
97 0x6176612f6c616e67L, 0x2f4f626a6563740cL,
98 0x0011000a01000a53L, 0x6f7572636546696cL,
99 0x6507000901001e6aL, 0x6176612f6c616e67L,
100 0x2f4e756c6c506f69L, 0x6e74657245786365L,
101 0x7074696f6e010003L, 0x282956010006422eL,
102 0x6a61736d01000443L, 0x6f646507000e0100L,
103 0x0142010001670100L, 0x01660100063c696eL,
104 0x69743e0021000d00L, 0x0400000000000300L,
105 0x010011000a000100L, 0x0c00000011000100L,
106 0x01000000052ab700L, 0x01b1000000000009L,
107 0x000f000a0001000cL, 0x0000000d00000000L,
108 0x00000001b1000000L, 0x0000090010000a00L,
109 0x01000c0000001c00L, 0x00000100000008b8L,
110 0x0002a700044bb100L, 0x0100000003000600L,
111 0x0800000001000700L, 0x000002000b000000L // 3 bytes extra
112
113 };
114 final int EXTRA = 3;
115
116 byte cf_bytes[] = toByteArray(cls_data);
117 Class c = defineClass("B", cf_bytes, 0, cf_bytes.length - EXTRA);
118
119 try { c.newInstance(); } // to force linking, thus verification
120 catch(InstantiationException e) {}
121 catch(IllegalAccessException e) {}
122 }
123
124 static private byte[] toByteArray(long arr[]) {
125 // convert long array to byte array
126 java.nio.ByteBuffer bbuf = java.nio.ByteBuffer.allocate(arr.length * 8);
127 bbuf.asLongBuffer().put(java.nio.LongBuffer.wrap(arr));
128 return bbuf.array();
129 }
130 }