1 /*
   2  * Copyright (c) 2014, 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 package execution;
  25 
  26 import hierarchies.TypeHierarchy;
  27 import scenarios.Scenario;
  28 
  29 /**
  30  *  Type profiling conflict execution scenario. The main goal is
  31  *  to make compiler profile and compile methods with different types.
  32  *  Scenario tests guards by passing conflicting types (incompatible
  33  *  for the profiled data).
  34  */
  35 public class TypeConflict<T extends TypeHierarchy.I, R> implements Execution<T, R> {
  36     /** Test methods execution number to make profile  */
  37     private final static int POLLUTION_THRESHOLD = 5000;
  38     /** Test methods execution number to make it profiled and compiled*/
  39     private final static int PROFILE_THRESHOLD = 20000;
  40 
  41     @Override
  42     public void execute(Scenario<T, R> scenario) {
  43         T base = scenario.getProfiled();
  44         T incompatible = scenario.getConflict();
  45 
  46         // pollute profile by passing different types
  47         R baseResult = null;
  48         R incResult = null;
  49         for (int i = 0; i < POLLUTION_THRESHOLD; i++) {
  50             baseResult = methodNotToCompile(scenario, base);
  51             incResult = methodNotToCompile(scenario, incompatible);
  52         }
  53         scenario.check(baseResult, base);
  54         scenario.check(incResult, incompatible);
  55 
  56         // profile and compile
  57         R result = null;
  58         for (int i = 0; i < PROFILE_THRESHOLD; i++) {
  59             result = methodNotToCompile(scenario, base);
  60         }
  61         scenario.check(result, base);
  62 
  63         // pass another type to make guard work and recompile
  64         for (int i = 0; i < PROFILE_THRESHOLD; i++) {
  65             result = methodNotToCompile(scenario, incompatible);
  66         }
  67         scenario.check(result, incompatible);
  68     }
  69 
  70     private R methodNotToCompile(Scenario<T, R> scenario, T t) {
  71         return scenario.run(t);
  72     }
  73 }
  74