/*
* Copyright (c) 2002, 2018, 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.
*/
//gctest02.java
/*
* @test
* @key gc
*
* @summary converted from VM Testbase gc/gctests/gctest02.
* VM Testbase keywords: [gc]
*
* @library /vmTestbase
* /test/lib
* @run driver jdk.test.lib.FileInstaller . .
* @run main/othervm gc.gctests.gctest02.gctest02 100
*/
package gc.gctests.gctest02;
import nsk.share.TestFailure;
import nsk.share.TestBug;
/* stress testing
create 16 memory evil threads requesting to allocate
the object of sizes from 8 to ( 2 ^ 19).
The live time of objects is random (0 ~ 1000).
Here we let the threads that reference the objects
to simulate the object life time.
*/
import java.util.Random;
class PopulationException extends Exception {
//this exception is used to signal that we've
//reached the end of the test
}
//the LocalRandom class is used to isolate the pseudo-random
//number generator from other parts of the system which might
//silently be using it.
//This is to make sure the tests are repeatable
class LocalRandom {
public static Random rGen = null;
public static double random() {
//should fail if rGen is not initialized
return rGen.nextDouble();
}
}
class ThreadCount {
static int count= 0;
static synchronized void inc() { count++; }
static synchronized void dec() { count --; }
static synchronized int get() { return count; }
}
class Person {
String name;
int ssid;
int age;
int buf[];
int bufsz;
static int populationCount = 0;
static int populationLimit = 0;
Person(String n, int ssid, int age, int bufsz)
throws PopulationException {
name = n;
this.ssid = ssid;
this.age = age;
if ( bufsz > 0 ) {
this.bufsz = bufsz;
this.buf = new int[bufsz];
}
incPopulation();
if (getPopulation() > getPopulationLimit()) {
throw new PopulationException();
}
}
public static synchronized int getPopulationLimit() {
return populationLimit;
}
public static synchronized void setPopulationLimit(int newLimit) {
populationLimit = newLimit;
}
public static synchronized int getPopulation() {
return populationCount;
}
public static synchronized void incPopulation() {
populationCount ++;
}
}
// hr (humane resource) dept is using objects.
// Put the hr thread to sleep to keep the reference to objects
class hr extends Thread {
Person pp;
int lifetime;
hr(Person p, int l) {
pp = p;
lifetime = l;
}
public void run() {
// just sleep to emulate the life time of object referenced by p
try { sleep(lifetime); }
catch (InterruptedException e) {}
}
}
class Memevil extends Thread {
int sum;
int bufsz = 64;
boolean debug = false;
Memevil(int bufsz) {
sum = 0;
this.bufsz = bufsz;
}
/* Person object is live short, it will be garbage after
* control returns
*/
private boolean doit() {
try {
Person p = new Person("Duke", 100, 100, bufsz);
hr useit = new hr(p, (int)(100*LocalRandom.random()));
useit.start();
return true;
}
catch (PopulationException e) {
return false;
}
catch (OutOfMemoryError e ) {
System.err.println(getName() + ": Out of Memory");
return false;
}
}
public void run() {
while ( doit() ) {
if ( LocalRandom.random() > 0.6668) {
try {
sleep(10); // to be nice
}
catch (InterruptedException e) {
}
}
Thread.yield();
}
//we've reached the population limit, so we're exiting the thread
ThreadCount.dec();
}
}
class Escaper extends Thread {
public void run() {
while ( ThreadCount.get() > 0 ) {
int buf[] = new int[32];
{
Thread.yield();
}
}
}
}
public class gctest02 {
public static void main(String args[] ) {
int bufsz = 8;
int peopleLimit = 1000;
long randomSeed = System.currentTimeMillis();
Memevil me=null;
if (args.length > 0)
{
try
{
peopleLimit = new Integer(args[0]).intValue();
}
catch (NumberFormatException e)
{
throw new TestBug(
"Bad input to gctest02. Expected integer, got: ->"
+ args[0] + "<-", e);
}
}
if (args.length == 2)
{
try
{
randomSeed = new Long(args[1]).longValue();
}
catch (NumberFormatException e)
{
throw new TestBug(
"Bad input to gctest02. Expected long, got: ->"
+ args[0] + "<-", e);
}
}
Person.setPopulationLimit(peopleLimit);
System.out.println("Seed value: " + randomSeed);
for (int ii=0; ii<40; ii++) {
bufsz = 8;
LocalRandom.rGen = new Random(randomSeed);
Person.populationCount = 0;
Escaper you = new Escaper();
you.setName("Escaper");
ThreadCount.inc();
you.start();
me = new Memevil(bufsz);
me.setName("Memevil" + bufsz);
bufsz = 2*bufsz;
me.start();
Thread.yield();
for (int i=1; i<11; i++) {
ThreadCount.inc();
me = new Memevil(bufsz);
me.setName("Memevil" + bufsz);
bufsz = 2*bufsz;
me.start();
Thread.yield();
}
try {
you.join();
}
catch (InterruptedException e) {
throw new TestFailure("InterruptedException in gctest2.main()");
}
for (int i=1; i<11; i++) {
try { me.join(); }
catch (InterruptedException e) {
throw new TestFailure("InterruptedException in gctest2.main()");
}
}
}
System.out.println("Test passed.");
}
}