1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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
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  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
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  23 
  24 /*
  25  * @test TestAggressiveHeap
  26  * @key gc
  27  * @bug 8179084
  28  * @summary Test argument processing for -XX:+AggressiveHeap.
  29  * @library /testlibrary
  30  * @run driver TestAggressiveHeap
  31  */
  32 
  33 import java.lang.management.ManagementFactory;
  34 import javax.management.MBeanServer;
  35 import javax.management.ObjectName;
  36 
  37 import com.oracle.java.testlibrary.OutputAnalyzer;
  38 import com.oracle.java.testlibrary.ProcessTools;
  39 
  40 public class TestAggressiveHeap {
  41 
  42     public static void main(String args[]) throws Exception {
  43         if (canUseAggressiveHeapOption()) {
  44             testFlag();
  45         }
  46     }
  47 
  48     // Note: Not a normal boolean flag; -XX:-AggressiveHeap is invalid.
  49     private static final String option = "-XX:+AggressiveHeap";
  50 
  51     // Option requires at least 256M, else error during option processing.
  52     private static final long minMemory = 256 * 1024 * 1024;
  53 
  54     // bool UseParallelGC := true {product}
  55     private static final String parallelGCPattern =
  56         " *bool +UseParallelGC *:= *true +\\{product\\}";
  57 
  58     private static void testFlag() throws Exception {
  59         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  60             option, "-XX:+PrintFlagsFinal", "-version");
  61 
  62         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  63 
  64         output.shouldHaveExitValue(0);
  65 
  66         String value = output.firstMatch(parallelGCPattern);
  67         if (value == null) {
  68             throw new RuntimeException(
  69                 option + " didn't set UseParallelGC");
  70         }
  71     }
  72 
  73     private static boolean haveRequiredMemory() throws Exception {
  74         MBeanServer server = ManagementFactory.getPlatformMBeanServer();
  75         ObjectName os = new ObjectName("java.lang", "type", "OperatingSystem");
  76         Object attr = server.getAttribute(os, "TotalPhysicalMemorySize");
  77         String value = attr.toString();
  78         long memory = Long.parseLong(value);
  79         return memory >= minMemory;
  80     }
  81 
  82     private static boolean canUseAggressiveHeapOption() throws Exception {
  83         if (!haveRequiredMemory()) {
  84             System.out.println(
  85                 "Skipping test of " + option + " : insufficient memory");
  86             return false;
  87         }
  88         return true;
  89     }
  90 }
  91