jdk8-mips64-public/hotspot: test/compiler/uncommontrap/TestSpecTrapClassUnloading.java@fb9d124d9192 (annotated)

test/compiler/uncommontrap/TestSpecTrapClassUnloading.java@fb9d124d9192 (annotated)

test/compiler/uncommontrap/TestSpecTrapClassUnloading.java

Wed, 21 May 2014 10:56:41 -0700

author: katleman
date: Wed, 21 May 2014 10:56:41 -0700
changeset 6672: fb9d124d9192
parent 6384: 8f28240318a2
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Added tag jdk8u20-b15 for changeset 8c785f9bde6f

 /*
  * Copyright (c) 2014, 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
  * @bug 8031752
  * @summary speculative traps need to be cleaned up at GC
  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:+UseTypeSpeculation -XX:TypeProfileLevel=222 -XX:CompileCommand=exclude,java.lang.reflect.Method::invoke -XX:CompileCommand=exclude,sun.reflect.DelegatingMethodAccessorImpl::invoke -Xmx1M TestSpecTrapClassUnloading
  *
  */
 import java.lang.reflect.Method;
 public class TestSpecTrapClassUnloading {
     static class B {
         final public boolean m(Object o) {
             if (o.getClass() == B.class) {
                 return true;
             }
             return false;
         }
     }
     static class MemoryChunk {
         MemoryChunk other;
         long[] array;
         MemoryChunk(MemoryChunk other) {
             other = other;
             array = new long[1024 * 1024 * 1024];
         }
     }
     static void m1(B b, Object o) {
         b.m(o);
     }
     static void m2(B b, Object o) {
         b.m(o);
     }
     public static void main(String[] args) throws Exception {
         Method m = B.class.getMethod("m", Object.class);
         Object o = new Object();
         B b = new B();
         // add speculative trap in B.m() for m1
         for (int i = 0; i < 20000; i++) {
             m1(b, b);
         }
         m1(b, o);
         // add speculative trap in B.m() for code generated by reflection
         for (int i = 0; i < 20000; i++) {
             m.invoke(b, b);
         }
         m.invoke(b, o);
         m = null;
         // add speculative trap in B.m() for m2
         for (int i = 0; i < 20000; i++) {
             m2(b, b);
         }
         m2(b, o);
         // Exhaust memory which causes the code generated by
         // reflection to be unloaded but B.m() is not.
         MemoryChunk root = null;
         try {
             while (true) {
                 root = new MemoryChunk(root);
             }
         } catch(OutOfMemoryError e) {
             root = null;
         }
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/uncommontrap/TestSpecTrapClassUnloading.java@fb9d124d9192 (annotated)

test/compiler/uncommontrap/TestSpecTrapClassUnloading.java