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comparison test/runtime/stackMapCheck/BadMapIstore.jasm @ 22916:6b65121b3258

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7127066: Class verifier accepts an invalid class file Summary: For *store bytecodes, compare incoming, not outgoing, type state with exception handlers' stack maps. Reviewed-by: acorn, dholmes
author hseigel
date Wed, 25 Mar 2015 08:16:48 -0400
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22910:3ca53859c3c7 22916:6b65121b3258
1 /*
2 * Copyright (c) 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
25 /*
26 * This class should throw VerifyError because the StackMap for bytecode index
27 * 9 (istore_2, line 60) is incorrect. The stack maps for bytecode indexes 9
28 * and 18 (astore_2, line 70) do not match because 9 does not supply enough
29 * locals to satisfy 18.
30 *
31 * The istore_2 bytecode at bytecode index 9 changes the type state,
32 * preventing the stackmap mismatch. But, if the incoming type state is used,
33 * as required by JVM Spec 8, then the verifier will detected the stackmap
34 * mismatch, and throw VerifyError.
35 */
36
37 super public class BadMapIstore
38 version 51:0
39 {
40
41 Field blah:I;
42
43 public Method "<init>":"()V"
44 stack 1 locals 1
45 {
46 aload_0;
47 invokespecial Method java/lang/Object."<init>":"()V";
48 return;
49 }
50
51 public static Method main:"([Ljava/lang/String;)V"
52 stack 2 locals 3
53 {
54 new class BadMapIstore;
55 dup;
56 invokespecial Method "<init>":"()V";
57 astore_1;
58 iconst_2;
59 try t0;
60 istore_2;
61 aload_1;
62 iconst_5;
63 putfield Field blah:"I";
64 endtry t0;
65 goto L22;
66 catch t0 java/lang/Throwable;
67 stack_frame_type full;
68 locals_map class "[Ljava/lang/String;", class BadMapIstore, int;
69 stack_map class java/lang/Throwable;
70 astore_2;
71 aload_1;
72 iconst_4;
73 istore_2;
74 pop;
75 L22: stack_frame_type same;
76 return;
77 }
78
79 } // end Class BadMapIstore