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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.
@@ -32,12 +32,12 @@
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];
@@ -76,11 +76,17 @@
if (!mbean.isThreadAllocatedMemoryEnabled()) {
throw new RuntimeException(
"ThreadAllocatedMemory is expected to be enabled");
}
- long size = mbean.getThreadAllocatedBytes(id);
+
+ // Test current thread two ways
+
+
+ // First way, getCurrentThreadAllocatedBytes
+
+ long size = mbean.getCurrentThreadAllocatedBytes();
// 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);
@@ -93,22 +99,118 @@
if (size1 < size) {
throw new RuntimeException("Allocated bytes " + size1 +
" expected >= " + size);
}
System.out.println(curThread.getName() +
- " Current thread allocated bytes = " + size +
- " allocated bytes = " + size1);
+ " Previous allocated bytes = " + size +
+ " Current allocated bytes = " + size1);
+
+ // back-to-back calls shouldn't allocate any memory
+ size = mbean.getCurrentThreadAllocatedBytes();
+ size1 = mbean.getCurrentThreadAllocatedBytes();
+ if (size1 != size) {
+ throw new RuntimeException("Allocated bytes " + size1 +
+ " expected == " + size);
+ }
+ System.out.println(curThread.getName() +
+ " Previous allocated bytes = " + size +
+ " Current allocated bytes = " + size1);
+
+ // Second way, getThreadAllocatedBytes
+
+ 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);
+ }
+
+ doit();
+
+ // Expected to be size1 >= size
+ size1 = mbean.getThreadAllocatedBytes(id);
+ if (size1 < size) {
+ throw new RuntimeException("Allocated bytes " + size1 +
+ " expected >= " + size);
+ }
+ System.out.println(curThread.getName() +
+ " Previous allocated bytes = " + size +
+ " Current allocated bytes = " + size1);
+
+ // back-to-back calls shouldn't allocate any memory
+ size = mbean.getThreadAllocatedBytes(id);
+ size1 = mbean.getThreadAllocatedBytes(id);
+ if (size1 != size) {
+ throw new RuntimeException("Allocated bytes " + size1 +
+ " expected == " + size);
+ }
+ System.out.println(curThread.getName() +
+ " Previous allocated bytes = " + size +
+ " Current allocated bytes = " + size1);
+
+
+ // Test a single thread that isn't ourself
+
+ // Start one thread, wait for it to block
+ // after doing some allocation
+ done = false; done1 = false;
+ curThread = new MyThread("MyThread");
+ curThread.start();
+ id = curThread.getId();
+ waitUntilThreadBlocked(curThread);
+ size = mbean.getThreadAllocatedBytes(id);
+
+ // let thread go to do some more allocation
+ synchronized (obj) {
+ done = true;
+ obj.notifyAll();
+ }
+
+ // wait for thread to get going again and sample it
+ goSleep(400);
+ size1 = mbean.getThreadAllocatedBytes(id);
+ if (size > size1) {
+ throw new RuntimeException(
+ curThread.getName() +
+ " previous allocated bytes = " + size +
+ " > current allocated bytes = " + size1);
+ }
+ System.out.println(curThread.getName() +
+ " Previous allocated bytes = " + size +
+ " Current allocated bytes = " + size1);
+
+ // 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);
+ testFailed = true;
+ }
+ if (testFailed) {
+ throw new RuntimeException("TEST FAILED");
+ }
+
+
+ // Test many threads
// start threads, wait for them to block
+ 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();
+ waitUntilThreadsBlocked();
for (int i = 0; i < NUM_THREADS; i++) {
sizes[i] = mbean.getThreadAllocatedBytes(threads[i].getId());
}
@@ -124,11 +226,11 @@
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: " +
+ throw new RuntimeException(
threads[i].getName() +
" previous allocated bytes = " + sizes[i] +
" > current allocated bytes = " + newSize);
}
System.out.println(threads[i].getName() +
@@ -154,10 +256,11 @@
}
if (testFailed) {
throw new RuntimeException("TEST FAILED");
}
+
System.out.println("Test passed");
}
private static void goSleep(long ms) throws Exception {
@@ -167,11 +270,22 @@
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;
@@ -223,11 +337,11 @@
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) {
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