1 /*
2 * Copyright (c) 2014, 2018, 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 * @test
26 * @bug 8055008 8197901 8010319
27 * @summary Redefine EMCP and non-EMCP methods that are running in an infinite loop
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 * @modules java.compiler
31 * java.instrument
32 * jdk.jartool/sun.tools.jar
33 * @run main RedefineClassHelper
34 * @run main/othervm/timeout=180 -javaagent:redefineagent.jar -Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace,class+loader+data=debug,safepoint+cleanup,gc+phases=debug:rt.log RedefineRunningMethods
35 */
36
37
38 // package access top-level class to avoid problem with RedefineClassHelper
39 // and nested types.
40 class RedefineRunningMethods_B {
41 static int count1 = 0;
42 static int count2 = 0;
43 public static volatile boolean stop = false;
44 static void localSleep() {
45 try{
46 Thread.currentThread().sleep(10);//sleep for 10 ms
47 } catch(InterruptedException ie) {
48 }
49 }
50
51 public static void infinite() {
52 while (!stop) { count1++; localSleep(); }
53 }
54 public static void infinite_emcp() {
55 while (!stop) { count2++; localSleep(); }
56 }
57 }
58
59 public class RedefineRunningMethods {
60
61 public static String newB =
62 "class RedefineRunningMethods_B {" +
63 " static int count1 = 0;" +
64 " static int count2 = 0;" +
65 " public static volatile boolean stop = false;" +
66 " static void localSleep() { " +
67 " try{ " +
68 " Thread.currentThread().sleep(10);" +
69 " } catch(InterruptedException ie) { " +
70 " } " +
71 " } " +
72 " public static void infinite() { " +
73 " System.out.println(\"infinite called\");" +
74 " }" +
75 " public static void infinite_emcp() { " +
76 " while (!stop) { count2++; localSleep(); }" +
77 " }" +
78 "}";
79
80 public static String evenNewerB =
81 "class RedefineRunningMethods_B {" +
82 " static int count1 = 0;" +
83 " static int count2 = 0;" +
84 " public static volatile boolean stop = false;" +
85 " static void localSleep() { " +
86 " try{ " +
87 " Thread.currentThread().sleep(1);" +
88 " } catch(InterruptedException ie) { " +
89 " } " +
90 " } " +
91 " public static void infinite() { }" +
92 " public static void infinite_emcp() { " +
93 " System.out.println(\"infinite_emcp now obsolete called\");" +
94 " }" +
95 "}";
96
97
98 public static void main(String[] args) throws Exception {
99
100 new Thread() {
101 public void run() {
102 RedefineRunningMethods_B.infinite();
103 }
104 }.start();
105
106 new Thread() {
107 public void run() {
108 RedefineRunningMethods_B.infinite_emcp();
109 }
110 }.start();
111
112 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, newB);
113
114 System.gc();
115
116 RedefineRunningMethods_B.infinite();
117
118 // Start a thread with the second version of infinite_emcp running
119 new Thread() {
120 public void run() {
121 RedefineRunningMethods_B.infinite_emcp();
122 }
123 }.start();
124
125 for (int i = 0; i < 20 ; i++) {
126 String s = new String("some garbage");
127 System.gc();
128 }
129
130 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, evenNewerB);
131 System.gc();
132
133 for (int i = 0; i < 20 ; i++) {
134 RedefineRunningMethods_B.infinite();
135 String s = new String("some garbage");
136 System.gc();
137 }
138
139 RedefineRunningMethods_B.infinite_emcp();
140
141 // purge should clean everything up.
142 RedefineRunningMethods_B.stop = true;
143
144 for (int i = 0; i < 20 ; i++) {
145 RedefineRunningMethods_B.infinite();
146 String s = new String("some garbage");
147 System.gc();
148 }
149 }
150 }