1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot.test;
  24 
  25 import org.junit.Test;
  26 
  27 import org.graalvm.compiler.api.directives.GraalDirectives;
  28 
  29 /**
  30  * Test on-stack-replacement with Graal. The test manually triggers a Graal OSR-compilation which is
  31  * later invoked when hitting the backedge counter overflow.
  32  */
  33 public class GraalOSRTest extends GraalOSRTestBase {
  34 
  35     @Test
  36     public void testOSR() {
  37         testOSR("test");
  38     }
  39 
  40     static int limit = 10000;
  41 
  42     public static ReturnValue test() {
  43         for (int i = 0; i < limit * limit; i++) {
  44             GraalDirectives.blackhole(i);
  45             if (GraalDirectives.inCompiledCode()) {
  46                 return ReturnValue.SUCCESS;
  47             }
  48         }
  49         return ReturnValue.FAILURE;
  50     }
  51 
  52 }