Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2013, 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.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 /*

  * @test

  * @key regression

  * @key gc

  * @bug 8027756

  * @library /testlibrary /testlibrary/whitebox

  * @build TestHumongousCodeCacheRoots

  * @run main ClassFileInstaller sun.hotspot.WhiteBox

  * @summary Humongous objects may have references from the code cache

  * @run main TestHumongousCodeCacheRoots

 */

 import com.oracle.java.testlibrary.*;

 import sun.hotspot.WhiteBox;

 import java.util.ArrayList;

 import java.util.Arrays;

 class TestHumongousCodeCacheRootsHelper {

     static final int n = 1000000;

     static final int[] AA = new int[n];

     static final int[] BB = new int[n];

     public static void main(String args[]) throws Exception {

         // do some work so that the compiler compiles this method, inlining the

         // reference to the integer array (which is a humonguous object) into

         // the code cache.

         for(int i = 0; i < n; i++) {

             AA[i] = 0;

             BB[i] = 0;

         }

         // trigger a GC that checks that the verification code allows humongous

         // objects with code cache roots; objects should be all live here.

         System.gc();

         // deoptimize everyhing: this should make all compiled code zombies.

         WhiteBox wb = WhiteBox.getWhiteBox();

         wb.deoptimizeAll();

         // trigger a GC that checks that the verification code allows humongous

         // objects with code cache roots; objects should be all live here.

         System.gc();

         // wait a little for the code cache sweeper to try to clean up zombie nmethods

         // and unregister the code roots.

         try { Thread.sleep(5000); } catch (InterruptedException ex) { }

         // do some work on the arrays to make sure that they need to be live after the GCs

         for(int i = 0; i < n; i++) {

             AA[i] = 1;

             BB[i] = 10;

         }

         System.out.println();

     }

 }

 public class TestHumongousCodeCacheRoots {

   /**

    * Executes a class in a new VM process with the given parameters.

    * @param vmargs Arguments to the VM to run

    * @param classname Name of the class to run

    * @param arguments Arguments to the class

    * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string

    * @return The OutputAnalyzer with the results for the invocation.

    */

   public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {

     ArrayList<String> finalargs = new ArrayList<String>();

     String[] whiteboxOpts = new String[] {

       "-Xbootclasspath/a:.",

       "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",

       "-cp", System.getProperty("java.class.path"),

     };

     if (useTestDotJavaDotOpts) {

       // System.getProperty("test.java.opts") is '' if no options is set,

       // we need to skip such a result

       String[] externalVMOpts = new String[0];

       if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {

         externalVMOpts = System.getProperty("test.java.opts").split(" ");

       }

       finalargs.addAll(Arrays.asList(externalVMOpts));

     }

     finalargs.addAll(Arrays.asList(vmargs));

     finalargs.addAll(Arrays.asList(whiteboxOpts));

     finalargs.add(classname);

     finalargs.addAll(Arrays.asList(arguments));

     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));

     OutputAnalyzer output = new OutputAnalyzer(pb.start());

     output.shouldHaveExitValue(0);

     return output;

   }

   public static void runTest(String compiler, String[] other) throws Exception {

     ArrayList<String> joined = new ArrayList<String>();

     joined.add(compiler);

     joined.addAll(Arrays.asList(other));

     runWhiteBoxTest(joined.toArray(new String[0]), TestHumongousCodeCacheRootsHelper.class.getName(),

       new String[] {}, false);

   }

   public static void main(String[] args) throws Exception {

     final String[] baseArguments = new String[] {

       "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region

       "-XX:+UnlockDiagnosticVMOptions",

       "-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking

       "-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run

       "-XX:NmethodSweepFraction=1", "-XX:NmethodSweepCheckInterval=1",  // make the code cache sweep more predictable

     };

     runTest("-client", baseArguments);

     runTest("-server", baseArguments);

   }

 }