1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 4882798
* @summary multi-thread test to exercise sync and contention for removes to transformer registry
* @author Gabriel Adauto, Wily Technology
*
* @run build TransformerManagementThreadRemoveTests
* @run shell MakeJAR.sh redefineAgent
* @run main/othervm -javaagent:redefineAgent.jar TransformerManagementThreadRemoveTests TransformerManagementThreadRemoveTests
*/
import java.util.*;
public class TransformerManagementThreadRemoveTests
extends TransformerManagementThreadAddTests
{
/**
* Constructor for TransformerManagementThreadRemoveTests.
* @param name
*/
public TransformerManagementThreadRemoveTests(String name)
{
super(name);
}
public static void
main (String[] args)
throws Throwable {
ATestCaseScaffold test = new TransformerManagementThreadRemoveTests(args[0]);
test.runTest();
}
protected final void
doRunTest()
throws Throwable {
testMultiThreadAddsAndRemoves();
}
public void
testMultiThreadAddsAndRemoves()
{
int size = TOTAL_THREADS + REMOVE_THREADS;
ArrayList threadList = new ArrayList(size);
for (int i = MIN_TRANS; i <= MAX_TRANS; i++)
{
int index = i - MIN_TRANS;
threadList.add(new TransformerThread("Trans"+prettyNum(index,2), i));
}
int factor = (int)Math.floor(TOTAL_THREADS / REMOVE_THREADS);
for (int i = 0; i < REMOVE_THREADS; i++)
{
threadList.add(factor * i, new RemoveThread("Remove"+i));
}
Thread[] threads = (Thread[])threadList.toArray(new Thread[size]);
setExecThread(new ExecuteTransformersThread());
getExecThread().start();
for (int i = threads.length - 1; i >= 0; i--)
{
threads[i].start();
}
while (!testCompleted())
{
// Effective Java - Item 51: Don't depend on the thread scheduler
// Use sleep() instead of yield().
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
}
}
assertTrue(finalCheck());
//printTransformers();
}
/**
* Method removeTransformer.
*/
private void
removeTransformer(Thread t)
{
ThreadTransformer tt = null;
synchronized (fAddedTransformers)
{
int size = fAddedTransformers.size();
if (size > 0)
{
int choose = (int)Math.floor(Math.random() * size);
tt = (ThreadTransformer)fAddedTransformers.remove(choose);
}
//System.out.println("removed("+tt+") size("+size+") chose("+choose+") by("+t+")");
}
if (tt != null)
{
getInstrumentation().removeTransformer(tt);
}
}
private class
RemoveThread
extends Thread
{
RemoveThread(String name)
{
super(name);
}
public void
run()
{
while (!threadsDone())
{
removeTransformer(RemoveThread.this);
}
}
}
}
|
