1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 8208499
  27  * @summary NMT should report safepoint polling page(s)
  28  * @key nmt jcmd
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @comment On ppc, with UseSIGTRAP on, no polling pages are used, but trap instructions instead.
  33  * @run main/othervm -XX:-UseSIGTRAP -XX:+IgnoreUnrecognizedVMOptions -Xbootclasspath/a:. -XX:NativeMemoryTracking=summary -XX:+ThreadLocalHandshakes SafepointPollingPages
  34  * @run main/othervm  -XX:-UseSIGTRAP -XX:+IgnoreUnrecognizedVMOptions -Xbootclasspath/a:. -XX:NativeMemoryTracking=summary -XX:-ThreadLocalHandshakes SafepointPollingPages
  35  */
  36 
  37 import jdk.test.lib.process.ProcessTools;
  38 import jdk.test.lib.process.OutputAnalyzer;
  39 import jdk.test.lib.JDKToolFinder;
  40 import jdk.internal.misc.Unsafe;
  41 
  42 public class SafepointPollingPages {
  43   public static void main(String args[]) throws Exception {
  44     OutputAnalyzer output;
  45 
  46     // Grab my own PID
  47     String pid = Long.toString(ProcessTools.getProcessId());
  48     ProcessBuilder pb = new ProcessBuilder();
  49 
  50     // Run 'jcmd <pid> VM.native_memory summary'
  51     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
  52     output = new OutputAnalyzer(pb.start());
  53     output.shouldContain("Safepoint (reserved=");
  54   }
  55 }
  56