1 /*
   2  * Copyright (c) 2013, 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 import java.util.function.Function;
  25 
  26 /*
  27  * @test ClearMethodStateTest
  28  * @bug 8006683 8007288 8022832
  29  * @library /testlibrary /testlibrary/whitebox
  30  * @build ClearMethodStateTest
  31  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  32  * @run main/othervm -Xbootclasspath/a:. -Xmixed -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,SimpleTestCase$Helper::* ClearMethodStateTest
  33  * @summary testing of WB::clearMethodState()
  34  * @author igor.ignatyev@oracle.com
  35  */
  36 public class ClearMethodStateTest extends CompilerWhiteBoxTest {
  37 
  38     public static void main(String[] args) throws Exception {
  39         CompilerWhiteBoxTest.main(ClearMethodStateTest::new, args);
  40     }
  41 
  42     private ClearMethodStateTest(TestCase testCase) {
  43         super(testCase);
  44         // to prevent inlining of #method
  45         WHITE_BOX.testSetDontInlineMethod(method, true);
  46     }
  47 
  48 
  49     /**
  50      * Tests {@code WB::clearMethodState()} by calling it before/after
  51      * compilation. For non-tiered, checks that counters will be rested after
  52      * clearing of method state.
  53      *
  54      * @throws Exception if one of the checks fails.
  55      */
  56     @Override
  57     protected void test() throws Exception {
  58         checkNotCompiled();
  59         compile();
  60         WHITE_BOX.clearMethodState(method);
  61         checkCompiled();
  62         WHITE_BOX.clearMethodState(method);
  63         deoptimize();
  64         checkNotCompiled();
  65 
  66         if (testCase.isOsr()) {
  67             // part test isn't applicable for OSR test case
  68             return;
  69         }
  70         if (!TIERED_COMPILATION) {
  71             WHITE_BOX.clearMethodState(method);
  72             compile(COMPILE_THRESHOLD);
  73             checkCompiled();
  74 
  75             deoptimize();
  76             checkNotCompiled();
  77             WHITE_BOX.clearMethodState(method);
  78 
  79             // invoke method one less time than needed to compile
  80             if (COMPILE_THRESHOLD > 1) {
  81                 compile(COMPILE_THRESHOLD - 1);
  82                 checkNotCompiled();
  83             } else {
  84                 System.err.println("Warning: 'CompileThreshold' <= 1");
  85             }
  86 
  87             compile(1);
  88             checkCompiled();
  89         } else {
  90             System.err.println(
  91                     "Warning: part of test is not applicable in Tiered");
  92         }
  93     }
  94 }