test/jdk/jdk/jfr/event/runtime/TestClassLoaderStatsEvent.java

rev 58872 : 8238358: Implementation of JEP 371: Hidden Classes
Reviewed-by: alanb, cjplummer, coleenp, dholmes, dlong, forax, jlahoda, psandoz, plevart, sspitsyn, vromero
Contributed-by: mandy.chung@oracle.com, lois.foltan@oracle.com, david.holmes@oracle.com, harold.seigel@oracle.com, serguei.spitsyn@oracle.com, alex.buckley@oracle.com, jamsheed.c.m@oracle.com, jan.lahoda@oracle.com, amy.lu@oracle.com

*** 1,7 ****
  /*
!  * Copyright (c) 2014, 2018, 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.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2014, 2020, 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.  Oracle designates this
*** 26,35 ****
--- 26,36 ----
  package jdk.jfr.event.runtime;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
+ import java.lang.reflect.Method;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  import java.util.List;
  
  import jdk.jfr.Recording;
*** 37,51 ****
--- 38,57 ----
  import jdk.jfr.consumer.RecordedEvent;
  import jdk.test.lib.Asserts;
  import jdk.test.lib.jfr.EventNames;
  import jdk.test.lib.jfr.Events;
  
+ import jdk.test.lib.compiler.InMemoryJavaCompiler;
+ 
  /**
   * @test
   * @key jfr
   * @requires vm.hasJFR
   * @library /test/lib /test/jdk
+  * @modules java.base/jdk.internal.misc
+  *          jdk.compiler
+  *          jdk.jfr
   * @build jdk.jfr.event.runtime.TestClasses
   * @run main/othervm jdk.jfr.event.runtime.TestClassLoaderStatsEvent
   */
  public class TestClassLoaderStatsEvent {
      private final static String EVENT_NAME = EventNames.ClassLoaderStatistics;
*** 71,86 ****
              }
              RecordedClassLoader recordedClassLoader = event.getValue("classLoader");
              if (CLASSLOADER_TYPE_NAME.equals(recordedClassLoader.getType().getName())) {
                  Asserts.assertEquals(CLASS_LOADER_NAME, recordedClassLoader.getName(),
                      "Expected class loader name " + CLASS_LOADER_NAME + ", got name " + recordedClassLoader.getName());
!                 Events.assertField(event, "classCount").equal(1L);
                  Events.assertField(event, "chunkSize").above(1L);
                  Events.assertField(event, "blockSize").above(1L);
!                 Events.assertField(event, "unsafeAnonymousClassCount").equal(1L);
!                 Events.assertField(event, "unsafeAnonymousChunkSize").above(1L);
!                 Events.assertField(event, "unsafeAnonymousBlockSize").above(1L);
                  isAnyFound = true;
              }
          }
          Asserts.assertTrue(isAnyFound, "No events found");
      }
--- 77,95 ----
              }
              RecordedClassLoader recordedClassLoader = event.getValue("classLoader");
              if (CLASSLOADER_TYPE_NAME.equals(recordedClassLoader.getType().getName())) {
                  Asserts.assertEquals(CLASS_LOADER_NAME, recordedClassLoader.getName(),
                      "Expected class loader name " + CLASS_LOADER_NAME + ", got name " + recordedClassLoader.getName());
!                 Events.assertField(event, "classCount").equal(2L);
                  Events.assertField(event, "chunkSize").above(1L);
                  Events.assertField(event, "blockSize").above(1L);
!                 Events.assertField(event, "unsafeAnonymousClassCount").equal(2L);
!                 Events.assertField(event, "unsafeAnonymousChunkSize").above(0L);
!                 Events.assertField(event, "unsafeAnonymousBlockSize").above(0L);
!                 Events.assertField(event, "hiddenClassCount").equal(2L);
!                 Events.assertField(event, "hiddenChunkSize").above(0L);
!                 Events.assertField(event, "hiddenBlockSize").above(0L);
                  isAnyFound = true;
              }
          }
          Asserts.assertTrue(isAnyFound, "No events found");
      }
*** 89,98 ****
--- 98,119 ----
          dummyloader = new DummyClassLoader(name);
          Class<?> c = Class.forName(TestClass.class.getName(), true, dummyloader);
          if (c.getClassLoader() != dummyloader) {
              throw new RuntimeException("TestClass defined by wrong classloader: " + c.getClassLoader());
          }
+ 
+         // Compile a class for method createNonFindableClasses() to use to create both a
+         // weak hidden class and an anonymous class.
+         byte klassbuf[] = InMemoryJavaCompiler.compile("jdk.jfr.event.runtime.TestClass",
+             "package jdk.jfr.event.runtime; " +
+             "public class TestClass { " +
+             "    public static void concat(String one, String two) throws Throwable { " +
+             " } } ");
+ 
+         Method m = c.getDeclaredMethod("createNonFindableClasses", byte[].class);
+         m.setAccessible(true);
+         m.invoke(null, klassbuf);
      }
  
      public static class DummyClassLoader extends ClassLoader {
  
          static ByteBuffer readClassFile(String name) {