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test/gc/TestSoftReferencesBehaviorOnOOME.java@5ba59d58d976
test/gc/TestSoftReferencesBehaviorOnOOME.java
Thu, 05 Jul 2018 18:27:02 +0200
- author
- sgehwolf
- date
- Thu, 05 Jul 2018 18:27:02 +0200
- changeset 9346
- 5ba59d58d976
- parent 8625
- f7b4a17a9d49
- permissions
- -rw-r--r--
8206425: .gnu_debuglink sections added unconditionally when no debuginfo is stripped
Summary: Only add .gnu_debuglink sections when there is some stripping done.
Reviewed-by: erikj, dholmes
1 /*
2 * Copyright (c) 2014, 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 */
24 /**
25 * @test TestSoftReferencesBehaviorOnOOME
26 * @key gc
27 * @summary Tests that all SoftReferences has been cleared at time of OOM.
28 * @library /testlibrary
29 * @build TestSoftReferencesBehaviorOnOOME
30 * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 512 2k
31 * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 128k 256k
32 * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 2k 32k 10
33 */
34 import java.util.*;
35 import com.oracle.java.testlibrary.Utils;
36 import java.lang.ref.SoftReference;
37 import java.util.LinkedList;
39 public class TestSoftReferencesBehaviorOnOOME {
41 private static final Random rndGenerator = new Random();
43 public static void main(String[] args) {
44 int semiRefAllocFrequency = DEFAULT_FREQUENCY;
45 long minSize = DEFAULT_MIN_SIZE,
46 maxSize = DEFAULT_MAX_SIZE;
48 if ( args.length >= 3 ) {
49 semiRefAllocFrequency = Integer.parseInt(args[2]);
50 }
52 if ( args.length >= 2) {
53 maxSize = getBytesCount(args[1]);
54 }
56 if ( args.length >= 1) {
57 minSize = getBytesCount(args[0]);
58 }
60 new TestSoftReferencesBehaviorOnOOME().softReferencesOom(minSize, maxSize, semiRefAllocFrequency);
61 }
63 /**
64 * Test that all SoftReferences has been cleared at time of OOM.
65 */
66 void softReferencesOom(long minSize, long maxSize, int semiRefAllocFrequency) {
67 System.out.format( "minSize = %d, maxSize = %d, freq = %d%n", minSize, maxSize, semiRefAllocFrequency );
68 long counter = 0;
70 long multiplier = maxSize - minSize;
71 LinkedList<SoftReference> arrSoftRefs = new LinkedList();
72 LinkedList arrObjects = new LinkedList();
73 long numberOfNotNulledObjects = 0;
74 long oomSoftArraySize = 0;
76 try {
77 while (true) {
78 // Keep every Xth object to make sure we hit OOM pretty fast
79 if (counter % semiRefAllocFrequency != 0) {
80 long allocationSize = ((int) (rndGenerator.nextDouble() * multiplier))
81 + minSize;
82 arrObjects.add(new byte[(int)allocationSize]);
83 } else {
84 arrSoftRefs.add(new SoftReference(new Object()));
85 }
87 counter++;
88 if (counter == Long.MAX_VALUE) {
89 counter = 0;
90 }
91 }
92 } catch (OutOfMemoryError oome) {
93 // Clear allocated ballast, so we don't get another OOM.
95 arrObjects = null;
97 // Get the number of soft refs first, so we don't trigger
98 // another OOM.
99 oomSoftArraySize = arrSoftRefs.size();
101 for (SoftReference sr : arrSoftRefs) {
102 Object o = sr.get();
104 if (o != null) {
105 numberOfNotNulledObjects++;
106 }
107 }
109 // Make sure we clear all refs before we return failure
110 arrSoftRefs = null;
112 if (numberOfNotNulledObjects > 0) {
113 throw new RuntimeException(numberOfNotNulledObjects + " out of "
114 + oomSoftArraySize + " SoftReferences was not "
115 + "null at time of OutOfMemoryError");
116 }
117 } finally {
118 arrSoftRefs = null;
119 arrObjects = null;
120 }
121 }
123 private static final long getBytesCount(String arg) {
124 String postfixes = "kMGT";
125 long mod = 1;
127 if (arg.trim().length() >= 2) {
128 mod = postfixes.indexOf(
129 arg.trim().charAt(arg.length() - 1)
130 );
132 if (mod != -1) {
133 mod = (long) Math.pow(1024, mod+1);
134 arg = arg.substring(0, arg.length() - 1);
135 } else {
136 mod = 1; // 10^0
137 }
138 }
140 return Long.parseLong(arg) * mod;
141 }
143 private static final long DEFAULT_MIN_SIZE = 512;
144 private static final long DEFAULT_MAX_SIZE = 1024;
145 private static final int DEFAULT_FREQUENCY = 4;
146 }
