1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/compiler/uncommontrap/TestSpecTrapClassUnloading.java Tue Feb 25 18:16:24 2014 +0100
1.3 @@ -0,0 +1,97 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test
1.29 + * @bug 8031752
1.30 + * @summary speculative traps need to be cleaned up at GC
1.31 + * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:+UnlockExperimentalVMOptions -XX:+UseTypeSpeculation -XX:TypeProfileLevel=222 -XX:CompileCommand=exclude,java.lang.reflect.Method::invoke -XX:CompileCommand=exclude,sun.reflect.DelegatingMethodAccessorImpl::invoke -Xmx1M TestSpecTrapClassUnloading
1.32 + *
1.33 + */
1.34 +
1.35 +import java.lang.reflect.Method;
1.36 +
1.37 +public class TestSpecTrapClassUnloading {
1.38 + static class B {
1.39 + final public boolean m(Object o) {
1.40 + if (o.getClass() == B.class) {
1.41 + return true;
1.42 + }
1.43 + return false;
1.44 + }
1.45 + }
1.46 +
1.47 + static class MemoryChunk {
1.48 + MemoryChunk other;
1.49 + long[] array;
1.50 + MemoryChunk(MemoryChunk other) {
1.51 + other = other;
1.52 + array = new long[1024 * 1024 * 1024];
1.53 + }
1.54 + }
1.55 +
1.56 + static void m1(B b, Object o) {
1.57 + b.m(o);
1.58 + }
1.59 +
1.60 + static void m2(B b, Object o) {
1.61 + b.m(o);
1.62 + }
1.63 +
1.64 + public static void main(String[] args) throws Exception {
1.65 + Method m = B.class.getMethod("m", Object.class);
1.66 + Object o = new Object();
1.67 + B b = new B();
1.68 +
1.69 + // add speculative trap in B.m() for m1
1.70 + for (int i = 0; i < 20000; i++) {
1.71 + m1(b, b);
1.72 + }
1.73 + m1(b, o);
1.74 +
1.75 + // add speculative trap in B.m() for code generated by reflection
1.76 + for (int i = 0; i < 20000; i++) {
1.77 + m.invoke(b, b);
1.78 + }
1.79 + m.invoke(b, o);
1.80 +
1.81 + m = null;
1.82 +
1.83 + // add speculative trap in B.m() for m2
1.84 + for (int i = 0; i < 20000; i++) {
1.85 + m2(b, b);
1.86 + }
1.87 + m2(b, o);
1.88 +
1.89 + // Exhaust memory which causes the code generated by
1.90 + // reflection to be unloaded but B.m() is not.
1.91 + MemoryChunk root = null;
1.92 + try {
1.93 + while (true) {
1.94 + root = new MemoryChunk(root);
1.95 + }
1.96 + } catch(OutOfMemoryError e) {
1.97 + root = null;
1.98 + }
1.99 + }
1.100 +}
