| /* |
| * 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 8073956 |
| * @summary Tests C2 EA with allocated object escaping through a call. |
| * |
| * @run main/othervm |
| * -XX:CompileCommand=dontinline,compiler.escapeAnalysis.TestEscapeThroughInvoke::create |
| * compiler.escapeAnalysis.TestEscapeThroughInvoke |
| */ |
| |
| package compiler.escapeAnalysis; |
| |
| public class TestEscapeThroughInvoke { |
| private A a; |
| |
| public static void main(String[] args) { |
| TestEscapeThroughInvoke test = new TestEscapeThroughInvoke(); |
| test.a = new A(42); |
| // Make sure run gets compiled by C2 |
| for (int i = 0; i < 100_000; ++i) { |
| test.run(); |
| } |
| } |
| |
| private void run() { |
| // Allocate something to trigger EA |
| new Object(); |
| // Create a new escaping instance of A and |
| // verify that it is always equal to 'a.saved'. |
| A escapingA = create(42); |
| a.check(escapingA); |
| } |
| |
| // Create and return a new instance of A that escaped through 'A::saveInto'. |
| // The 'dummy' parameters are needed to avoid EA skipping the methods. |
| private A create(Integer dummy) { |
| A result = new A(dummy); |
| result.saveInto(a, dummy); // result escapes into 'a' here |
| return result; |
| } |
| |
| static class A { |
| private A saved; |
| |
| public A(Integer dummy) { |
| } |
| |
| public void saveInto(A other, Integer dummy) { |
| other.saved = this; |
| } |
| |
| public void check(A other) { |
| if (this.saved != other) { |
| throw new RuntimeException("TEST FAILED: Objects not equal."); |
| } |
| } |
| } |
| } |