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 import java.io.BufferedInputStream;
  26 import java.io.ByteArrayOutputStream;
  27 import java.io.IOException;
  28 import java.util.concurrent.Callable;
  29 import java.util.Random;
  30 
  31 import jdk.test.lib.Asserts;
  32 import jdk.test.lib.ByteCodeLoader;
  33 import jdk.test.lib.InfiniteLoop;
  34 import jdk.test.lib.Utils;
  35 import sun.hotspot.WhiteBox;
  36 






  37 public final class Helper {
  38     public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  39     public static final Random RNG = Utils.getRandomInstance();
  40 
  41     private static final long THRESHOLD = WHITE_BOX.getIntxVMFlag("CompileThreshold");
  42     private static final String TEST_CASE_IMPL_CLASS_NAME = "Helper$TestCaseImpl";
  43     private static byte[] CLASS_DATA;
  44     static {
  45         try {
  46             CLASS_DATA = loadClassData(TEST_CASE_IMPL_CLASS_NAME);
  47         } catch (IOException e) {
  48             throw new Error("TESTBUG: cannot load class byte code", e);
  49         }
  50     }
  51 
  52     private Helper() {
  53     }
  54 
  55     public static void startInfiniteLoopThread(Runnable action) {
  56         startInfiniteLoopThread(action, 0L);
  57     }
  58 
  59     public static void startInfiniteLoopThread(Runnable action, long millis) {
  60         Thread t = new Thread(new InfiniteLoop(action, millis));
  61         t.setDaemon(true);
  62         t.start();
  63     }
  64 
  65     public static int callMethod(Callable<Integer> callable, int expected) {
  66         int result = 0;
  67         for (int i = 0; i < THRESHOLD; ++i) {
  68             try {

   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 package compiler.codecache.stress;




  26 
  27 import jdk.test.lib.Asserts;
  28 import jdk.test.lib.ByteCodeLoader;
  29 import jdk.test.lib.InfiniteLoop;
  30 import jdk.test.lib.Utils;
  31 import sun.hotspot.WhiteBox;
  32 
  33 import java.io.BufferedInputStream;
  34 import java.io.ByteArrayOutputStream;
  35 import java.io.IOException;
  36 import java.util.Random;
  37 import java.util.concurrent.Callable;
  38 
  39 public final class Helper {
  40     public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  41     public static final Random RNG = Utils.getRandomInstance();
  42 
  43     private static final long THRESHOLD = WHITE_BOX.getIntxVMFlag("CompileThreshold");
  44     private static final String TEST_CASE_IMPL_CLASS_NAME = "compiler.codecache.stress.Helper$TestCaseImpl";
  45     private static byte[] CLASS_DATA;
  46     static {
  47         try {
  48             CLASS_DATA = loadClassData(TEST_CASE_IMPL_CLASS_NAME);
  49         } catch (IOException e) {
  50             throw new Error("TESTBUG: cannot load class byte code " + TEST_CASE_IMPL_CLASS_NAME, e);
  51         }
  52     }
  53 
  54     private Helper() {
  55     }
  56 
  57     public static void startInfiniteLoopThread(Runnable action) {
  58         startInfiniteLoopThread(action, 0L);
  59     }
  60 
  61     public static void startInfiniteLoopThread(Runnable action, long millis) {
  62         Thread t = new Thread(new InfiniteLoop(action, millis));
  63         t.setDaemon(true);
  64         t.start();
  65     }
  66 
  67     public static int callMethod(Callable<Integer> callable, int expected) {
  68         int result = 0;
  69         for (int i = 0; i < THRESHOLD; ++i) {
  70             try {