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test/jdk/com/sun/management/ThreadMXBean/ThreadAllocatedMemory.java
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2019, 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.
@@ -21,31 +21,46 @@
* questions.
*/
/*
* @test
- * @bug 6173675
+ * @bug 6173675 8207266
* @summary Basic test of ThreadMXBean.getThreadAllocatedBytes
* @author Paul Hohensee
*/
import java.lang.management.*;
public class ThreadAllocatedMemory {
private static com.sun.management.ThreadMXBean mbean =
(com.sun.management.ThreadMXBean)ManagementFactory.getThreadMXBean();
- private static boolean testFailed = false;
- private static boolean done = false;
- private static boolean done1 = false;
+ private static volatile boolean done = false;
+ private static volatile boolean done1 = false;
private static Object obj = new Object();
private static final int NUM_THREADS = 10;
private static Thread[] threads = new Thread[NUM_THREADS];
private static long[] sizes = new long[NUM_THREADS];
public static void main(String[] argv)
throws Exception {
+ testSupportEnableDisable();
+
+ // Test current thread two ways
+ testGetCurrentThreadAllocatedBytes();
+ testCurrentThreadGetThreadAllocatedBytes();
+
+ // Test a single thread that is not this one
+ testGetThreadAllocatedBytes();
+
+ // Test many threads that are not this one
+ testGetThreadsAllocatedBytes();
+
+ System.out.println("Test passed");
+ }
+
+ private static void testSupportEnableDisable() {
if (!mbean.isThreadAllocatedMemorySupported()) {
return;
}
// disable allocated memory measurement
@@ -56,14 +71,11 @@
if (mbean.isThreadAllocatedMemoryEnabled()) {
throw new RuntimeException(
"ThreadAllocatedMemory is expected to be disabled");
}
- Thread curThread = Thread.currentThread();
- long id = curThread.getId();
-
- long s = mbean.getThreadAllocatedBytes(id);
+ long s = mbean.getCurrentThreadAllocatedBytes();
if (s != -1) {
throw new RuntimeException(
"Invalid ThreadAllocatedBytes returned = " +
s + " expected = -1");
}
@@ -75,46 +87,97 @@
if (!mbean.isThreadAllocatedMemoryEnabled()) {
throw new RuntimeException(
"ThreadAllocatedMemory is expected to be enabled");
}
+ }
- long size = mbean.getThreadAllocatedBytes(id);
- // implementation could have started measurement when
- // measurement was enabled, in which case size can be 0
- if (size < 0) {
- throw new RuntimeException(
- "Invalid allocated bytes returned = " + size);
+ private static void testGetCurrentThreadAllocatedBytes() {
+ long size = mbean.getCurrentThreadAllocatedBytes();
+ ensureValidSize(size);
+
+ // do some more allocation
+ doit();
+
+ checkResult(Thread.currentThread(), size,
+ mbean.getCurrentThreadAllocatedBytes());
}
+ private static void testCurrentThreadGetThreadAllocatedBytes() {
+ Thread curThread = Thread.currentThread();
+ long id = curThread.getId();
+
+ long size = mbean.getThreadAllocatedBytes(id);
+ ensureValidSize(size);
+
+ // do some more allocation
doit();
- // Expected to be size1 >= size
- long size1 = mbean.getThreadAllocatedBytes(id);
- if (size1 < size) {
- throw new RuntimeException("Allocated bytes " + size1 +
- " expected >= " + size);
+ checkResult(curThread, size, mbean.getThreadAllocatedBytes(id));
}
- System.out.println(curThread.getName() +
- " Current thread allocated bytes = " + size +
- " allocated bytes = " + size1);
+ private static void testGetThreadAllocatedBytes()
+ throws Exception {
+
+ // start a thread
+ done = false; done1 = false;
+ Thread curThread = new MyThread("MyThread");
+ curThread.start();
+ long id = curThread.getId();
+
+ // wait for thread to block after doing some allocation
+ waitUntilThreadBlocked(curThread);
+
+ long size = mbean.getThreadAllocatedBytes(id);
+ ensureValidSize(size);
+
+ // let thread go to do some more allocation
+ synchronized (obj) {
+ done = true;
+ obj.notifyAll();
+ }
- // start threads, wait for them to block
+ // wait for thread to get going again. we don't care if we
+ // catch it in mid-execution or if it hasn't
+ // restarted after we're done sleeping.
+ goSleep(400);
+
+ checkResult(curThread, size, mbean.getThreadAllocatedBytes(id));
+
+ // let thread exit
+ synchronized (obj) {
+ done1 = true;
+ obj.notifyAll();
+ }
+
+ try {
+ curThread.join();
+ } catch (InterruptedException e) {
+ System.out.println("Unexpected exception is thrown.");
+ e.printStackTrace(System.out);
+ }
+ }
+
+ private static void testGetThreadsAllocatedBytes()
+ throws Exception {
+
+ // start threads
+ done = false; done1 = false;
for (int i = 0; i < NUM_THREADS; i++) {
threads[i] = new MyThread("MyThread-" + i);
threads[i].start();
}
- // threads block after doing some allocation
- waitUntilThreadBlocked();
+ // wait for threads to block after doing some allocation
+ waitUntilThreadsBlocked();
for (int i = 0; i < NUM_THREADS; i++) {
sizes[i] = mbean.getThreadAllocatedBytes(threads[i].getId());
+ ensureValidSize(sizes[i]);
}
- // let threads go and do some more allocation
+ // let threads go to do some more allocation
synchronized (obj) {
done = true;
obj.notifyAll();
}
@@ -122,20 +185,12 @@
// catch them in mid-execution or if some of them haven't
// restarted after we're done sleeping.
goSleep(400);
for (int i = 0; i < NUM_THREADS; i++) {
- long newSize = mbean.getThreadAllocatedBytes(threads[i].getId());
- if (sizes[i] > newSize) {
- throw new RuntimeException("TEST FAILED: " +
- threads[i].getName() +
- " previous allocated bytes = " + sizes[i] +
- " > current allocated bytes = " + newSize);
- }
- System.out.println(threads[i].getName() +
- " Previous allocated bytes = " + sizes[i] +
- " Current allocated bytes = " + newSize);
+ checkResult(threads[i], sizes[i],
+ mbean.getThreadAllocatedBytes(threads[i].getId()));
}
// let threads exit
synchronized (obj) {
done1 = true;
@@ -146,32 +201,56 @@
try {
threads[i].join();
} catch (InterruptedException e) {
System.out.println("Unexpected exception is thrown.");
e.printStackTrace(System.out);
- testFailed = true;
break;
}
}
- if (testFailed) {
- throw new RuntimeException("TEST FAILED");
}
- System.out.println("Test passed");
+ private static void ensureValidSize(long size) {
+ // implementation could have started measurement when
+ // measurement was enabled, in which case size can be 0
+ if (size < 0) {
+ throw new RuntimeException(
+ "Invalid allocated bytes returned = " + size);
+ }
}
+ private static void checkResult(Thread curThread,
+ long prev_size, long curr_size) {
+ if (curr_size < prev_size) {
+ throw new RuntimeException("Allocated bytes " + curr_size +
+ " expected >= " + prev_size);
+ }
+ System.out.println(curThread.getName() +
+ " Previous allocated bytes = " + prev_size +
+ " Current allocated bytes = " + curr_size);
+ }
private static void goSleep(long ms) throws Exception {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
System.out.println("Unexpected exception is thrown.");
throw e;
}
}
- private static void waitUntilThreadBlocked()
+ private static void waitUntilThreadBlocked(Thread thread)
+ throws Exception {
+ while (true) {
+ goSleep(100);
+ ThreadInfo info = mbean.getThreadInfo(thread.getId());
+ if (info.getThreadState() == Thread.State.WAITING) {
+ break;
+ }
+ }
+ }
+
+ private static void waitUntilThreadsBlocked()
throws Exception {
int count = 0;
while (count != NUM_THREADS) {
goSleep(100);
count = 0;
@@ -208,11 +287,10 @@
try {
obj.wait();
} catch (InterruptedException e) {
System.out.println("Unexpected exception is thrown.");
e.printStackTrace(System.out);
- testFailed = true;
break;
}
}
}
@@ -223,11 +301,11 @@
System.out.println(getName() + ": " +
"ThreadAllocatedBytes = " + size1 +
" ThreadAllocatedBytes = " + size2);
if (size1 > size2) {
- throw new RuntimeException("TEST FAILED: " + getName() +
+ throw new RuntimeException(getName() +
" ThreadAllocatedBytes = " + size1 +
" > ThreadAllocatedBytes = " + size2);
}
synchronized (obj) {
@@ -235,11 +313,10 @@
try {
obj.wait();
} catch (InterruptedException e) {
System.out.println("Unexpected exception is thrown.");
e.printStackTrace(System.out);
- testFailed = true;
break;
}
}
}
}
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