/*
|
* Copyright (C) 2009 The Android Open Source Project
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
import java.util.concurrent.*;
|
import java.util.concurrent.atomic.AtomicLong;
|
|
/**
|
* Test for Jit regressions.
|
*/
|
public class Main {
|
public static void main(String args[]) throws Exception {
|
b17689750TestVolatile();
|
b17689750TestMonitor();
|
}
|
|
static void b17689750TestVolatile() {
|
final B17689750TestVolatile test = new B17689750TestVolatile();
|
new Thread() {
|
public void run() {
|
test.thread1();
|
}
|
}.start();
|
try {
|
test.thread2();
|
} catch (NullPointerException expected) {
|
System.out.println("b17689750TestVolatile passed.");
|
}
|
}
|
|
static void b17689750TestMonitor() {
|
final B17689750TestMonitor test = new B17689750TestMonitor();
|
new Thread() {
|
public void run() {
|
test.thread1();
|
}
|
}.start();
|
try {
|
test.thread2();
|
} catch (NullPointerException expected) {
|
System.out.println("b17689750TestMonitor passed.");
|
}
|
}
|
}
|
|
class B17689750TestVolatile {
|
private volatile int state = 0;
|
private int[] values = { 42 };
|
|
void thread1() {
|
while (state != 1) { } // Busy loop.
|
values = null;
|
state = 2;
|
}
|
|
void thread2() {
|
int[] vs1 = values;
|
state = 1;
|
while (state != 2) { } // Busy loop.
|
int[] vs2 = values;
|
int v1 = vs1[0];
|
int v2 = vs2[0];
|
System.out.println("b17689750TestVolatile failed: " + v1 + ", " + v2);
|
}
|
}
|
|
class B17689750TestMonitor {
|
private int state = 0;
|
private Object lock = new Object();
|
private int[] values = { 42 };
|
|
void thread1() {
|
int s;
|
do {
|
synchronized (lock) {
|
s = state;
|
}
|
} while (s != 1); // Busy loop.
|
|
synchronized (lock) {
|
values = null;
|
state = 2;
|
}
|
}
|
|
void thread2() {
|
int[] vs1;
|
synchronized (lock) {
|
vs1 = values;
|
state = 1;
|
}
|
|
int s;
|
do {
|
synchronized (lock) {
|
s = state;
|
}
|
} while (s != 2); // Busy loop.
|
|
int[] vs2 = values;
|
int v1 = vs1[0];
|
int v2 = vs2[0];
|
System.out.println("b17689750TestMonitor failed: " + v1 + ", " + v2);
|
}
|
}
|
