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 8027572
  27  * @summary class unloading resets profile, method compiled after the profile is first set and before class loading sets unknown bit with not recorded class
  28  * @build B
  29  * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation TestProfileConflictClassUnloading



  30  *
  31  */
  32 


  33 import java.net.MalformedURLException;
  34 import java.net.URL;
  35 import java.net.URLClassLoader;
  36 import java.nio.file.Paths;
  37 
  38 public class TestProfileConflictClassUnloading {
  39     static class A {
  40     }
  41 
  42 
  43     static void m1(Object o) {
  44     }
  45 
  46     static void m2(Object o) {
  47         m1(o);
  48     }
  49 
  50     static void m3(A a, boolean do_call) {
  51         if (!do_call) {
  52             return;
  53         }
  54         m2(a);
  55     }
  56 
  57     public static ClassLoader newClassLoader() {
  58         try {
  59             return new URLClassLoader(new URL[] {
  60                     Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
  61             }, null);
  62         } catch (MalformedURLException e){
  63             throw new RuntimeException("Unexpected URL conversion failure", e);
  64         }
  65     }
  66 
  67     public static void main(String[] args) throws Exception {
  68         ClassLoader loader = newClassLoader();
  69         Object o = loader.loadClass("B").newInstance();
  70         // collect conflicting profiles
  71         for (int i = 0; i < 5000; i++) {
  72             m2(o);
  73         }
  74         // prepare for conflict
  75         A a = new A();
  76         for (int i = 0; i < 5000; i++) {
  77             m3(a, false);
  78         }
  79         // unload class in profile
  80         o = null;
  81         loader = null;
  82         System.gc();
  83         // record the conflict
  84         m3(a, true);
  85         // trigger another GC
  86         System.gc();
  87     }
  88 }

   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 8027572
  27  * @summary class unloading resets profile, method compiled after the profile is
  28  * first set and before class loading sets unknown bit with not recorded class
  29  * @library /
  30  * @build compiler.profiling.unloadingconflict.B
  31  * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation
  32  *                   compiler.profiling.unloadingconflict.TestProfileConflictClassUnloading
  33  *
  34  */
  35 
  36 package compiler.profiling.unloadingconflict;
  37 
  38 import java.net.MalformedURLException;
  39 import java.net.URL;
  40 import java.net.URLClassLoader;
  41 import java.nio.file.Paths;
  42 
  43 public class TestProfileConflictClassUnloading {
  44     static class A {
  45     }
  46 
  47 
  48     static void m1(Object o) {
  49     }
  50 
  51     static void m2(Object o) {
  52         m1(o);
  53     }
  54 
  55     static void m3(A a, boolean do_call) {
  56         if (!do_call) {
  57             return;
  58         }
  59         m2(a);
  60     }
  61 
  62     public static ClassLoader newClassLoader() {
  63         try {
  64             return new URLClassLoader(new URL[] {
  65                     Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),
  66             }, null);
  67         } catch (MalformedURLException e){
  68             throw new RuntimeException("Unexpected URL conversion failure", e);
  69         }
  70     }
  71 
  72     public static void main(String[] args) throws Exception {
  73         ClassLoader loader = newClassLoader();
  74         Object o = loader.loadClass("compiler.profiling.unloadingconflict.B").newInstance();
  75         // collect conflicting profiles
  76         for (int i = 0; i < 5000; i++) {
  77             m2(o);
  78         }
  79         // prepare for conflict
  80         A a = new A();
  81         for (int i = 0; i < 5000; i++) {
  82             m3(a, false);
  83         }
  84         // unload class in profile
  85         o = null;
  86         loader = null;
  87         System.gc();
  88         // record the conflict
  89         m3(a, true);
  90         // trigger another GC
  91         System.gc();
  92     }
  93 }