| /* |
| * Copyright (c) 2009, 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 6851282 |
| * @summary JIT miscompilation results in null entry in array when using CompressedOops |
| * |
| * @run main/othervm/timeout=600 -Xmx256m -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops |
| * compiler.c2.Test6851282 |
| */ |
| |
| package compiler.c2; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class Test6851282 { |
| void foo(A a, A[] as) { |
| for (A a1 : as) { |
| B[] filtered = a.c(a1); |
| for (B b : filtered) { |
| if (b == null) { |
| System.out.println("bug: b == null"); |
| System.exit(97); |
| } |
| } |
| } |
| } |
| |
| public static void main(String[] args) { |
| List<A> as = new ArrayList<A>(); |
| for (int i = 0; i < 5000; i++) { |
| List<B> bs = new ArrayList<B>(); |
| for (int j = i; j < i + 1000; j++) |
| bs.add(new B(j)); |
| as.add(new A(bs.toArray(new B[0]))); |
| } |
| new Test6851282().foo(as.get(0), as.subList(1, as.size()).toArray(new A[0])); |
| } |
| |
| static class A { |
| final B[] bs; |
| |
| public A(B[] bs) { |
| this.bs = bs; |
| } |
| |
| final B[] c(final A a) { |
| return new BoxedArray<B>(bs).filter(new Function<B, Boolean>() { |
| public Boolean apply(B arg) { |
| for (B b : a.bs) { |
| if (b.d == arg.d) |
| return true; |
| } |
| return false; |
| } |
| }); |
| } |
| } |
| |
| static class BoxedArray<T> { |
| |
| private final T[] array; |
| |
| BoxedArray(T[] array) { |
| this.array = array; |
| } |
| |
| public T[] filter(Function<T, Boolean> function) { |
| boolean[] include = new boolean[array.length]; |
| int len = 0; |
| int i = 0; |
| while (i < array.length) { |
| if (function.apply(array[i])) { |
| include[i] = true; |
| len += 1; |
| } |
| i += 1; |
| } |
| T[] result = (T[]) java.lang.reflect.Array.newInstance(array.getClass().getComponentType(), len); |
| len = 0; |
| i = 0; |
| while (len < result.length) { |
| if (include[i]) { |
| result[len] = array[i]; |
| len += 1; |
| } |
| i += 1; |
| } |
| return result; |
| } |
| } |
| |
| static interface Function<T, R> { |
| R apply(T arg); |
| } |
| |
| static class B { |
| final int d; |
| |
| public B(int d) { |
| this.d = d; |
| } |
| } |
| } |
| |