提交 68c3efcb 编写于 作者: A asaha

Merge

......@@ -817,6 +817,7 @@ ca3b8c8e390ab0540b0cc2e5def869b38e460d86 jdk8u75-b01
916712f178c39d0acbc590f38802133fc86a7346 jdk8u75-b06
8c791dd1c24d85ebd18b03d49185c2a25263c129 jdk8u75-b07
e4a935cb6f7178912fd653e2a9514eadec7935ab jdk8u75-b08
e97c45c377eb8d022cfe24b73737fa312107e0a5 jdk8u75-b09
d7b01fb81aa8a5437cb03bc36afe15cf0e55fb89 jdk8u76-b00
c1679cc87ba045219169cabb6b9b378c2b5cc578 jdk8u76-b01
218483967e52b419d885d34af4488a81c5133804 jdk8u76-b02
......
/*
* Copyright (c) 2014 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 TestSoftReferencesBehaviorOnOOME
* @key gc
* @summary Tests that all SoftReferences has been cleared at time of OOM.
* @library /testlibrary
* @build TestSoftReferencesBehaviorOnOOME
* @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 512 2k
* @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 128k 256k
* @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 2k 32k 10
*/
import java.util.*;
import com.oracle.java.testlibrary.Utils;
import java.lang.ref.SoftReference;
import java.util.LinkedList;
public class TestSoftReferencesBehaviorOnOOME {
private static final Random rndGenerator = new Random();
public static void main(String[] args) {
int semiRefAllocFrequency = DEFAULT_FREQUENCY;
long minSize = DEFAULT_MIN_SIZE,
maxSize = DEFAULT_MAX_SIZE;
if ( args.length >= 3 ) {
semiRefAllocFrequency = Integer.parseInt(args[2]);
}
if ( args.length >= 2) {
maxSize = getBytesCount(args[1]);
}
if ( args.length >= 1) {
minSize = getBytesCount(args[0]);
}
new TestSoftReferencesBehaviorOnOOME().softReferencesOom(minSize, maxSize, semiRefAllocFrequency);
}
/**
* Test that all SoftReferences has been cleared at time of OOM.
*/
void softReferencesOom(long minSize, long maxSize, int semiRefAllocFrequency) {
System.out.format( "minSize = %d, maxSize = %d, freq = %d%n", minSize, maxSize, semiRefAllocFrequency );
long counter = 0;
long multiplier = maxSize - minSize;
LinkedList<SoftReference> arrSoftRefs = new LinkedList();
LinkedList arrObjects = new LinkedList();
long numberOfNotNulledObjects = 0;
long oomSoftArraySize = 0;
try {
while (true) {
// Keep every Xth object to make sure we hit OOM pretty fast
if (counter % semiRefAllocFrequency != 0) {
long allocationSize = ((int) (rndGenerator.nextDouble() * multiplier))
+ minSize;
arrObjects.add(new byte[(int)allocationSize]);
} else {
arrSoftRefs.add(new SoftReference(new Object()));
}
counter++;
if (counter == Long.MAX_VALUE) {
counter = 0;
}
}
} catch (OutOfMemoryError oome) {
// Clear allocated ballast, so we don't get another OOM.
arrObjects = null;
// Get the number of soft refs first, so we don't trigger
// another OOM.
oomSoftArraySize = arrSoftRefs.size();
for (SoftReference sr : arrSoftRefs) {
Object o = sr.get();
if (o != null) {
numberOfNotNulledObjects++;
}
}
// Make sure we clear all refs before we return failure
arrSoftRefs = null;
if (numberOfNotNulledObjects > 0) {
throw new RuntimeException(numberOfNotNulledObjects + " out of "
+ oomSoftArraySize + " SoftReferences was not "
+ "null at time of OutOfMemoryError");
}
} finally {
arrSoftRefs = null;
arrObjects = null;
}
}
private static final long getBytesCount(String arg) {
String postfixes = "kMGT";
long mod = 1;
if (arg.trim().length() >= 2) {
mod = postfixes.indexOf(
arg.trim().charAt(arg.length() - 1)
);
if (mod != -1) {
mod = (long) Math.pow(1024, mod+1);
arg = arg.substring(0, arg.length() - 1);
} else {
mod = 1; // 10^0
}
}
return Long.parseLong(arg) * mod;
}
private static final long DEFAULT_MIN_SIZE = 512;
private static final long DEFAULT_MAX_SIZE = 1024;
private static final int DEFAULT_FREQUENCY = 4;
}
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册