| /* |
| * 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 |
| * @bug 8027572 |
| * @summary class unloading resets profile, method compiled after the profile is first set and before class loading sets unknown bit with not recorded class |
| * @build B |
| * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation TestProfileConflictClassUnloading |
| * |
| */ |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.nio.file.Paths; |
| |
| public class TestProfileConflictClassUnloading { |
| static class A { |
| } |
| |
| |
| static void m1(Object o) { |
| } |
| |
| static void m2(Object o) { |
| m1(o); |
| } |
| |
| static void m3(A a, boolean do_call) { |
| if (!do_call) { |
| return; |
| } |
| m2(a); |
| } |
| |
| public static ClassLoader newClassLoader() { |
| try { |
| return new URLClassLoader(new URL[] { |
| Paths.get(System.getProperty("test.classes",".")).toUri().toURL(), |
| }, null); |
| } catch (MalformedURLException e){ |
| throw new RuntimeException("Unexpected URL conversion failure", e); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| ClassLoader loader = newClassLoader(); |
| Object o = loader.loadClass("B").newInstance(); |
| // collect conflicting profiles |
| for (int i = 0; i < 5000; i++) { |
| m2(o); |
| } |
| // prepare for conflict |
| A a = new A(); |
| for (int i = 0; i < 5000; i++) { |
| m3(a, false); |
| } |
| // unload class in profile |
| o = null; |
| loader = null; |
| System.gc(); |
| // record the conflict |
| m3(a, true); |
| // trigger another GC |
| System.gc(); |
| } |
| } |