122 lines
4.9 KiB
Java
122 lines
4.9 KiB
Java
/*
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* Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.management.*;
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/*
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* @test
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* @bug 8205878 8206954
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* @requires os.family != "windows"
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* @comment Calling pthread_getcpuclockid() with invalid pid leads to undefined
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* behavior in musl libc (see 8240187).
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* @requires !vm.musl
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* @library /testlibrary
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* @summary Basic test of Thread and ThreadMXBean queries on a natively
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* attached thread that has failed to detach before terminating.
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* @comment The native code only supports POSIX so no windows testing
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* @run main/othervm/native TestTerminatedThread
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*/
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import jvmti.JVMTIUtils;
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public class TestTerminatedThread {
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static native Thread createTerminatedThread();
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static {
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System.loadLibrary("terminatedThread");
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}
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private static ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
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public static void main(String[] args) throws Throwable {
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Thread t = createTerminatedThread();
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if (!t.isAlive())
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throw new Error("Thread is only supposed to terminate at native layer!");
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// Now invoke the various functions on this thread to
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// make sure the VM handles it okay. The focus is on
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// functions with an underlying native OS implementation.
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// Generally as long as we don't crash or throw unexpected
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// exceptions then the test passes. In some cases we know exactly
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// what a function should return and so can check that.
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System.out.println("Working with thread: " + t +
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", in state: " + t.getState());
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System.out.println("Calling suspend ...");
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JVMTIUtils.suspendThread(t);
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System.out.println("Calling resume ...");
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JVMTIUtils.resumeThread(t);
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System.out.println("Calling getStackTrace ...");
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StackTraceElement[] stack = t.getStackTrace();
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System.out.println(java.util.Arrays.toString(stack));
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if (stack.length != 0)
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throw new Error("Terminated thread should have empty java stack trace");
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System.out.println("Calling setName(\"NewName\") ...");
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t.setName("NewName");
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System.out.println("Calling interrupt ...");
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t.interrupt();
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// Now the ThreadMXBean functions
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if (mbean.isThreadCpuTimeSupported() &&
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mbean.isThreadCpuTimeEnabled() ) {
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System.out.println("Calling getThreadCpuTime ...");
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long t1 = mbean.getThreadCpuTime(t.getId());
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if (t1 != -1) {
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// At least on PPC, we know threads can still be around a short
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// instant. In some stress scenarios we seem to grab times of
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// new threads started with the same thread id. In these cases
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// we get here.
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System.out.println("Unexpected: thread still reports CPU time: " + t1);
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} else {
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System.out.println("Okay: getThreadCpuTime() reported -1 as expected");
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}
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} else {
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System.out.println("Skipping Thread CPU time test as it's not supported");
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}
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System.out.println("Calling getThreadUserTime ...");
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long t1 = mbean.getThreadUserTime(t.getId());
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if (t1 != -1) {
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// At least on PPC, we know threads can still be around a short
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// instant. In some stress scenarios we seem to grab times of
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// new threads started with the same thread id. In these cases
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// we get here.
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System.out.println("Unexpected: thread still reports User time: " + t1);
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} else {
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System.out.println("Okay: getThreadUserTime() reported -1 as expected");
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}
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System.out.println("Calling getThreadInfo ...");
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ThreadInfo info = mbean.getThreadInfo(t.getId());
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System.out.println(info);
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System.out.println("Calling getThreadInfo with stack ...");
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info = mbean.getThreadInfo(t.getId(), Integer.MAX_VALUE);
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System.out.println(info);
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}
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}
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