|
1 /* |
|
2 * Copyright (c) 2017, Red Hat, Inc. 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 * @test |
|
26 * @bug 8174164 |
|
27 * @summary SafePointNode::_replaced_nodes breaks with irreducible loops |
|
28 * @run main/othervm -XX:-BackgroundCompilation TestReplacedNodesOSR |
|
29 * |
|
30 */ |
|
31 |
|
32 public class TestReplacedNodesOSR { |
|
33 |
|
34 static Object dummy; |
|
35 |
|
36 static interface I { |
|
37 } |
|
38 |
|
39 static class A implements I { |
|
40 } |
|
41 |
|
42 static final class MyException extends Exception { |
|
43 } |
|
44 |
|
45 static final A obj = new A(); |
|
46 static I static_field() { return obj; } |
|
47 |
|
48 // When OSR compiled, this method has an irreducible loop |
|
49 static void test(int v, MyException e) { |
|
50 int i = 0; |
|
51 for (;;) { |
|
52 if (i == 1000) { |
|
53 break; |
|
54 } |
|
55 try { |
|
56 if ((i%2) == 0) { |
|
57 int j = 0; |
|
58 for (;;) { |
|
59 j++; |
|
60 if (i+j != v) { |
|
61 if (j == 1000) { |
|
62 break; |
|
63 } |
|
64 } else { |
|
65 A a = (A)static_field(); |
|
66 // replaced node recorded here |
|
67 throw e; |
|
68 } |
|
69 } |
|
70 } |
|
71 } catch(MyException ex) { |
|
72 } |
|
73 i++; |
|
74 // replaced node applied on return of the method |
|
75 // replaced node used here |
|
76 dummy = static_field(); |
|
77 } |
|
78 } |
|
79 |
|
80 |
|
81 static public void main(String[] args) { |
|
82 for (int i = 0; i < 1000; i++) { |
|
83 test(1100, new MyException()); |
|
84 } |
|
85 } |
|
86 } |