/* * 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
*/
publicclass 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);
}
}
}
}
publicstaticvoid 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]));
}
staticclass A { final B[] bs;
public A(B[] bs) { this.bs = bs;
}
final B[] c(final A a) { returnnew BoxedArray<B>(bs).filter(newFunction<B, Boolean>() { publicBoolean apply(B arg) { for (B b : a.bs) { if (b.d == arg.d) returntrue;
} returnfalse;
}
});
}
}
staticclass BoxedArray<T> {
privatefinal T[] array;
BoxedArray(T[] array) { this.array = array;
}
public T[] filter(Function<T, Boolean> function) { boolean[] include = newboolean[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;
}
}
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