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 /*
  25  * @test IsMethodCompilableTest
  26  * @bug 8007270 8006683 8007288 8022832
  27  * @library /testlibrary /testlibrary/whitebox
  28  * @build IsMethodCompilableTest
  29  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  30  * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,SimpleTestCase$Helper::* IsMethodCompilableTest
  31  * @summary testing of WB::isMethodCompilable()
  32  * @author igor.ignatyev@oracle.com
  33  */
  34 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
  35     /**
  36      * Value of {@code -XX:PerMethodRecompilationCutoff}
  37      */
  38     protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
  39 
  40     static {
  41         long tmp = Long.parseLong(
  42                 getVMOption("PerMethodRecompilationCutoff", "400"));
  43         if (tmp == -1) {
  44             PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
  45         } else {
  46             PER_METHOD_RECOMPILATION_CUTOFF = 1 + (0xFFFFFFFFL & tmp);
  47         }
  48     }
  49 
  50     public static void main(String[] args) throws Exception {
  51         CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
  52     }
  53 
  54     private IsMethodCompilableTest(TestCase testCase) {
  55         super(testCase);
  56         // to prevent inlining of #method
  57         WHITE_BOX.testSetDontInlineMethod(method, true);
  58     }
  59 
  60     /**
  61      * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
  62      * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
  63      * checks that WB::clearMethodState() clears no-compilable flags.
  64      *
  65      * @throws Exception if one of the checks fails.
  66      */
  67     @Override
  68     protected void test() throws Exception {
  69         if (testCase.isOsr() && CompilerWhiteBoxTest.MODE.startsWith(
  70                 "compiled ")) {
  71           System.err.printf("Warning: %s is not applicable in %s%n",
  72                 testCase.name(), CompilerWhiteBoxTest.MODE);
  73           return;
  74         }
  75         if (!isCompilable()) {
  76             throw new RuntimeException(method + " must be compilable");
  77         }
  78         System.out.println("PerMethodRecompilationCutoff = "
  79                 + PER_METHOD_RECOMPILATION_CUTOFF);
  80         if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
  81             System.err.println(
  82                     "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
  83             return;
  84         }
  85 
  86         // deoptimize 'PerMethodRecompilationCutoff' times and clear state
  87         for (long i = 0L, n = PER_METHOD_RECOMPILATION_CUTOFF - 1; i < n; ++i) {
  88             compileAndDeoptimize();
  89         }
  90         if (!testCase.isOsr() && !isCompilable()) {
  91             // in osr test case count of deopt maybe more than iterations
  92             throw new RuntimeException(method + " is not compilable after "
  93                     + (PER_METHOD_RECOMPILATION_CUTOFF - 1) + " iterations");
  94         }
  95         WHITE_BOX.clearMethodState(method);
  96 
  97         // deoptimize 'PerMethodRecompilationCutoff' + 1 times
  98         long i;
  99         for (i = 0L; i < PER_METHOD_RECOMPILATION_CUTOFF
 100                 && isCompilable(); ++i) {
 101             compileAndDeoptimize();
 102         }
 103         if (!testCase.isOsr() && i != PER_METHOD_RECOMPILATION_CUTOFF) {
 104             // in osr test case count of deopt maybe more than iterations
 105             throw new RuntimeException(method + " is not compilable after "
 106                     + i + " iterations, but must only after "
 107                     + PER_METHOD_RECOMPILATION_CUTOFF);
 108         }
 109         if (isCompilable()) {
 110             throw new RuntimeException(method + " is still compilable after "
 111                     + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
 112         }
 113         compile();
 114         checkNotCompiled();
 115 
 116         // WB.clearMethodState() must reset no-compilable flags
 117         WHITE_BOX.clearMethodState(method);
 118         if (!isCompilable()) {
 119             throw new RuntimeException(method
 120                     + " is not compilable after clearMethodState()");
 121         }
 122         compile();
 123         checkCompiled();
 124     }
 125 
 126     private void compileAndDeoptimize() throws Exception {
 127         compile();
 128         waitBackgroundCompilation();
 129         deoptimize();
 130     }
 131 }