1 /*
   2  * Copyright (c) 2018, 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 
  24 
  25 /*
  26  * @test
  27  *
  28  * @summary converted from VM Testbase vm/mlvm/indy/stress/java/mutableCallSiteDekker.
  29  * VM Testbase keywords: [feature_mlvm, nonconcurrent]
  30  * VM Testbase readme:
  31  * DESCRIPTION
  32  *    The test tries to detect a stale handle in MutableCallSite due to store-after-load reordering in
  33  *    modern CPU.
  34  *    Since MutableCallSite does not guarantee that changes by one thread are propagated to others,
  35  *    the test may fail. We ignore such failure.
  36  *    The current Oracle Hotspot JVM implementation uses an internal mutex when relinking a call site,
  37  *    which serves as memory barrier between store and load in this test, so I never saw it failing.
  38  *
  39  * @library /vmTestbase
  40  *          /test/lib
  41  *
  42  * @comment build actor
  43  * @build vm.mlvm.indy.stress.java.mutableCallSiteDekker.Actor
  44  *
  45  * @run driver jdk.test.lib.FileInstaller . .
  46  *
  47  * @comment build test class and indify classes
  48  * @build vm.mlvm.share.DekkerTest
  49  * @run driver vm.mlvm.share.IndifiedClassesBuilder
  50  *
  51  * @run main/othervm
  52  *      vm.mlvm.share.DekkerTest
  53  *      -actorClass vm.mlvm.indy.stress.java.mutableCallSiteDekker.Actor
  54  *      -iterations 100000
  55  *      -runs 30
  56  *      -mayFail true
  57  */
  58