aoqi@0: /*
aoqi@0:  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @test
aoqi@0:  * @bug 6851282
aoqi@0:  * @summary JIT miscompilation results in null entry in array when using CompressedOops
aoqi@0:  *
aoqi@0:  * @run main/othervm/timeout=600 -Xmx256m -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops Test
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.util.ArrayList;
aoqi@0: import java.util.List;
aoqi@0: 
aoqi@0: public class Test {
aoqi@0:   void foo(A a, A[] as) {
aoqi@0:     for (A a1 : as) {
aoqi@0:       B[] filtered = a.c(a1);
aoqi@0:       for (B b : filtered) {
aoqi@0:         if (b == null) {
aoqi@0:           System.out.println("bug: b == null");
aoqi@0:           System.exit(97);
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   public static void main(String[] args) {
aoqi@0:     List<A> as = new ArrayList<A>();
aoqi@0:     for (int i = 0; i < 5000; i++) {
aoqi@0:       List<B> bs = new ArrayList<B>();
aoqi@0:       for (int j = i; j < i + 1000; j++)
aoqi@0:         bs.add(new B(j));
aoqi@0:       as.add(new A(bs.toArray(new B[0])));
aoqi@0:     }
aoqi@0:     new Test().foo(as.get(0), as.subList(1, as.size()).toArray(new A[0]));
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: class A {
aoqi@0:   final B[] bs;
aoqi@0: 
aoqi@0:   public A(B[] bs) {
aoqi@0:     this.bs = bs;
aoqi@0:   }
aoqi@0: 
aoqi@0:   final B[] c(final A a) {
aoqi@0:     return new BoxedArray<B>(bs).filter(new Function<B, Boolean>() {
aoqi@0:       public Boolean apply(B arg) {
aoqi@0:         for (B b : a.bs) {
aoqi@0:           if (b.d == arg.d)
aoqi@0:             return true;
aoqi@0:         }
aoqi@0:         return false;
aoqi@0:       }
aoqi@0:     });
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: class BoxedArray<T> {
aoqi@0: 
aoqi@0:   private final T[] array;
aoqi@0: 
aoqi@0:   BoxedArray(T[] array) {
aoqi@0:     this.array = array;
aoqi@0:   }
aoqi@0: 
aoqi@0:   public T[] filter(Function<T, Boolean> function) {
aoqi@0:     boolean[] include = new boolean[array.length];
aoqi@0:     int len = 0;
aoqi@0:     int i = 0;
aoqi@0:     while (i < array.length) {
aoqi@0:       if (function.apply(array[i])) {
aoqi@0:         include[i] = true;
aoqi@0:         len += 1;
aoqi@0:       }
aoqi@0:       i += 1;
aoqi@0:     }
aoqi@0:     T[] result = (T[]) java.lang.reflect.Array.newInstance(array.getClass().getComponentType(), len);
aoqi@0:     len = 0;
aoqi@0:     i = 0;
aoqi@0:     while (len < result.length) {
aoqi@0:       if (include[i]) {
aoqi@0:         result[len] = array[i];
aoqi@0:         len += 1;
aoqi@0:       }
aoqi@0:       i += 1;
aoqi@0:     }
aoqi@0:     return result;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: interface Function<T, R> {
aoqi@0:   R apply(T arg);
aoqi@0: }
aoqi@0: 
aoqi@0: class B {
aoqi@0:   final int d;
aoqi@0:   public B(int d) {
aoqi@0:     this.d = d;
aoqi@0:   }
aoqi@0: }
aoqi@0: