| /* |
| * Copyright (c) 2015, 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 8080699 |
| * @summary eliminated arraycopy node still reachable through exception edges |
| * |
| * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation |
| * compiler.arraycopy.TestDeadArrayCopyOnMemChain |
| */ |
| |
| package compiler.arraycopy; |
| |
| public class TestDeadArrayCopyOnMemChain { |
| static class A { |
| int f; |
| } |
| |
| static void test_helper(Object o) { |
| } |
| |
| static void test(int src_off, boolean flag) { |
| // dst is eliminated first. Eliminating dst causes src to be |
| // eliminated. When working on the safepoint at the uncommon |
| // trap in the exception handler, the eliminated ArrayCopyNode |
| // is reached through the exception edges. |
| Object[] dst = new Object[10]; |
| Object[] src = new Object[10]; |
| |
| // src_off causes the exception handler to be run sometimes |
| try { |
| System.arraycopy(src, src_off, dst, 0, 10); |
| } catch (IndexOutOfBoundsException ioobe) { |
| // flag always false so test becomes uncommon trap. Make |
| // sure src is live at the unc. |
| if (flag) { |
| test_helper(src); |
| } |
| } |
| } |
| |
| static public void main(String[] args) { |
| for (int i = 0; i < 20000; i++) { |
| test((i%2) == 0 ? 0 : -1, false); |
| } |
| } |
| } |