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 -javaagent:redefineagent.jar -Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace,class+loader+data=debug,safepoint+cleanup,gc+phases=debug RedefineRunningMethods
35 */
36 // Test is executed with full trace logging redirected to a file to ensure there is no crash during logging anonymous classes - see JDK-8197901
37
38
39 // package access top-level class to avoid problem with RedefineClassHelper
40 // and nested types.
41 class RedefineRunningMethods_B {
42 static int count1 = 0;
43 static int count2 = 0;
44 public static volatile boolean stop = false;
45 static void localSleep() {
46 try{
47 Thread.currentThread().sleep(10);//sleep for 10 ms
48 } catch(InterruptedException ie) {
49 }
50 }
51
52 public static void infinite() {
53 while (!stop) { count1++; localSleep(); }
54 }
55 public static void infinite_emcp() {
56 while (!stop) { count2++; localSleep(); }
57 }
58 }
59
60 public class RedefineRunningMethods {
61
62 public static String newB =
63 "class RedefineRunningMethods_B {" +
64 " static int count1 = 0;" +
65 " static int count2 = 0;" +
66 " public static volatile boolean stop = false;" +
67 " static void localSleep() { " +
68 " try{ " +
69 " Thread.currentThread().sleep(10);" +
70 " } catch(InterruptedException ie) { " +
71 " } " +
72 " } " +
73 " public static void infinite() { " +
74 " System.out.println(\"infinite called\");" +
75 " }" +
76 " public static void infinite_emcp() { " +
77 " while (!stop) { count2++; localSleep(); }" +
78 " }" +
79 "}";
80
81 public static String evenNewerB =
82 "class RedefineRunningMethods_B {" +
83 " static int count1 = 0;" +
84 " static int count2 = 0;" +
85 " public static volatile boolean stop = false;" +
86 " static void localSleep() { " +
87 " try{ " +
88 " Thread.currentThread().sleep(1);" +
89 " } catch(InterruptedException ie) { " +
90 " } " +
91 " } " +
92 " public static void infinite() { }" +
93 " public static void infinite_emcp() { " +
94 " System.out.println(\"infinite_emcp now obsolete called\");" +
95 " }" +
96 "}";
97
98
99 public static void main(String[] args) throws Exception {
100
101 new Thread() {
102 public void run() {
103 RedefineRunningMethods_B.infinite();
104 }
105 }.start();
106
107 new Thread() {
108 public void run() {
109 RedefineRunningMethods_B.infinite_emcp();
110 }
111 }.start();
112
113 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, newB);
114
115 System.gc();
116
117 RedefineRunningMethods_B.infinite();
118
119 // Start a thread with the second version of infinite_emcp running
120 new Thread() {
121 public void run() {
122 RedefineRunningMethods_B.infinite_emcp();
123 }
124 }.start();
125
126 for (int i = 0; i < 20 ; i++) {
127 String s = new String("some garbage");
128 System.gc();
129 }
130
131 RedefineClassHelper.redefineClass(RedefineRunningMethods_B.class, evenNewerB);
132 System.gc();
133
134 for (int i = 0; i < 20 ; i++) {
135 RedefineRunningMethods_B.infinite();
136 String s = new String("some garbage");
137 System.gc();
138 }
139
140 RedefineRunningMethods_B.infinite_emcp();
141
142 // purge should clean everything up.
143 RedefineRunningMethods_B.stop = true;
144
145 for (int i = 0; i < 20 ; i++) {
146 RedefineRunningMethods_B.infinite();
147 String s = new String("some garbage");
148 System.gc();
149 }
150 }
151 }