Mercurial > hg > truffle
view test/compiler/profiling/unloadingconflict/TestProfileConflictClassUnloading.java @ 18470:eb2a8bb3c2c4
SimpleStackSlotAllocator: use an array instead of a HashMap.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 20 Nov 2014 10:42:54 +0100 |
parents | 6e1826d5c23e |
children |
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/* * 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(); } }