1 /*
   2  * Copyright (c) 2015, 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
  26  * @bug 8074551
  27  * @modules java.base/jdk.internal.misc
  28  * @library /testlibrary
  29  * @run main PollutedTrapCounts
  30  */
  31 import java.lang.invoke.*;
  32 import jdk.test.lib.*;
  33 
  34 public class PollutedTrapCounts {
  35     public static void main(String[] args) throws Exception {
  36         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  37                 "-XX:+IgnoreUnrecognizedVMOptions",
  38                 "-XX:-TieredCompilation", "-Xbatch",
  39                 "-XX:PerBytecodeRecompilationCutoff=10", "-XX:PerMethodRecompilationCutoff=10",
  40                 "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining",
  41                     "PollutedTrapCounts$Test");
  42 
  43         OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
  44 
  45         analyzer.shouldHaveExitValue(0);
  46 
  47         analyzer.shouldNotContain("not compilable (disabled)");
  48     }
  49 
  50     static class Test {
  51         public static final MethodHandle test1;
  52         public static final MethodHandle test2;
  53         public static final MethodHandle empty;
  54 
  55         static {
  56             try {
  57                 Class<?> THIS_CLASS = Test.class;
  58                 MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
  59                 test1 = LOOKUP.findStatic(THIS_CLASS, "test1", MethodType.methodType(boolean.class, boolean.class));
  60                 test2 = LOOKUP.findStatic(THIS_CLASS, "test2", MethodType.methodType(boolean.class, boolean.class));
  61                 empty = LOOKUP.findStatic(THIS_CLASS, "empty", MethodType.methodType(void.class, boolean.class));
  62             } catch(Throwable e) {
  63                 throw new Error(e);
  64             }
  65         }
  66 
  67         static boolean test1(boolean b) {
  68             return b;
  69         }
  70         static boolean test2(boolean b) {
  71             return true;
  72         }
  73         static void    empty(boolean b) {}
  74 
  75         static void test(boolean freqValue, boolean removeInlineBlocker) throws Throwable {
  76             MethodHandle innerGWT = MethodHandles.guardWithTest(test1, empty, empty);
  77             MethodHandle outerGWT = MethodHandles.guardWithTest(test2, innerGWT, innerGWT);
  78 
  79             // Trigger compilation
  80             for (int i = 0; i < 20_000; i++) {
  81                 outerGWT.invokeExact(freqValue);
  82             }
  83 
  84             // Trigger deopt & nmethod invalidation
  85             outerGWT.invokeExact(!freqValue);
  86 
  87             // Force inline blocker removal on rare-taken path
  88             if (removeInlineBlocker) {
  89                 for (int i = 0; i < 100; i++) {
  90                     outerGWT.invokeExact(!freqValue);
  91                 }
  92             }
  93 
  94             // Trigger recompilation
  95             for (int i = 0; i < 20_000; i++) {
  96                 outerGWT.invokeExact(freqValue);
  97             }
  98         }
  99 
 100         public static void main(String[] args) throws Throwable {
 101             boolean freqValue = true;
 102             boolean removeInlineBlocker = false;
 103             for (int i = 0; i < 20; i++) {
 104                 test(freqValue, removeInlineBlocker);
 105                 freqValue = !freqValue;
 106                 removeInlineBlocker = !removeInlineBlocker;
 107             }
 108         }
 109     }
 110 }