Mercurial > hg > graal-compiler
view test/compiler/uncommontrap/TestSpecTrapClassUnloading.java @ 20403:8ec8971f511a
8057531: refactor gc argument processing code slightly
Reviewed-by: mgerdin, tschatzl, jmasa
author | jcoomes |
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date | Thu, 04 Sep 2014 16:53:27 -0700 |
parents | 8f28240318a2 |
children | 92aa6797d639 |
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/* * 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; } } }