107 lines
3.2 KiB
Java
107 lines
3.2 KiB
Java
/*
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* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8031752
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* @summary speculative traps need to be cleaned up at GC
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*
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation
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* -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
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* -XX:CompileThreshold=10000
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* -XX:+UseTypeSpeculation -XX:TypeProfileLevel=222
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* -XX:CompileCommand=exclude,java.lang.reflect.Method::invoke
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* -XX:CompileCommand=exclude,sun.reflect.DelegatingMethodAccessorImpl::invoke
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* -Xmx512M
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* compiler.profiling.TestSpecTrapClassUnloading
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*/
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package compiler.profiling;
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import java.lang.reflect.Method;
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public class TestSpecTrapClassUnloading {
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static class B {
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final public boolean m(Object o) {
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if (o.getClass() == B.class) {
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return true;
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}
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return false;
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}
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}
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static class MemoryChunk {
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MemoryChunk other;
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long[] array;
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MemoryChunk(MemoryChunk other) {
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this.other = other;
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array = new long[1024 * 1024 * 1024];
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}
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}
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static void m1(B b, Object o) {
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b.m(o);
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}
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static void m2(B b, Object o) {
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b.m(o);
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}
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public static void main(String[] args) throws Exception {
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Method m = B.class.getMethod("m", Object.class);
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Object o = new Object();
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B b = new B();
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// add speculative trap in B.m() for m1
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for (int i = 0; i < 20000; i++) {
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m1(b, b);
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}
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m1(b, o);
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// add speculative trap in B.m() for code generated by reflection
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for (int i = 0; i < 20000; i++) {
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m.invoke(b, b);
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}
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m.invoke(b, o);
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m = null;
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// add speculative trap in B.m() for m2
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for (int i = 0; i < 20000; i++) {
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m2(b, b);
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}
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m2(b, o);
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// Exhaust memory which causes the code generated by
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// reflection to be unloaded but B.m() is not.
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MemoryChunk root = null;
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try {
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while (true) {
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root = new MemoryChunk(root);
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}
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} catch(OutOfMemoryError e) {
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root = null;
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}
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}
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}
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