| /* |
| * 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; |
| } |
| } |
| } |