1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
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  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).
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  23 
  24 /*
  25  * @test Test2GbHeap
  26  * @bug 8031686
  27  * @summary Regression test to ensure we can start G1 with 2gb heap.
  28  * @key gc
  29  * @key regression
  30  * @library /testlibrary
  31  * @modules java.base/sun.misc
  32  *          java.management
  33  */
  34 
  35 import java.util.ArrayList;
  36 
  37 import jdk.test.lib.OutputAnalyzer;
  38 import jdk.test.lib.ProcessTools;
  39 
  40 public class Test2GbHeap {
  41   public static void main(String[] args) throws Exception {
  42     ArrayList<String> testArguments = new ArrayList<String>();
  43 
  44     testArguments.add("-XX:+UseG1GC");
  45     testArguments.add("-Xmx2g");
  46     testArguments.add("-version");
  47 
  48     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(testArguments.toArray(new String[0]));
  49 
  50     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  51 
  52     // Avoid failing test for setups not supported.
  53     if (output.getOutput().contains("Could not reserve enough space for 2097152KB object heap")) {
  54       // Will fail on machines with too little memory (and Windows 32-bit VM), ignore such failures.
  55       output.shouldHaveExitValue(1);
  56     } else if (output.getOutput().contains("G1 GC is disabled in this release")) {
  57       // G1 is not supported on embedded, ignore such failures.
  58       output.shouldHaveExitValue(1);
  59     } else {
  60       // Normally everything should be fine.
  61       output.shouldHaveExitValue(0);
  62     }
  63   }
  64 }