1 /*
   2  * Copyright (c) 2016, 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  * @modules java.base/jdk.internal.misc
  27  * @library /testlibrary
  28  * @run main ContinuousCallSiteTargetChange
  29  */
  30 import java.lang.invoke.*;
  31 import jdk.test.lib.*;
  32 
  33 public class ContinuousCallSiteTargetChange {
  34     static void testServer() throws Exception {
  35         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  36                 "-XX:+IgnoreUnrecognizedVMOptions",
  37                 "-server", "-XX:-TieredCompilation", "-Xbatch",
  38                 "-XX:PerBytecodeRecompilationCutoff=10", "-XX:PerMethodRecompilationCutoff=10",
  39                 "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining",
  40                 "ContinuousCallSiteTargetChange$Test", "100");
  41 
  42         OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
  43 
  44         analyzer.shouldHaveExitValue(0);
  45 
  46         analyzer.shouldNotContain("made not compilable");
  47         analyzer.shouldNotContain("decompile_count > PerMethodRecompilationCutoff");
  48     }
  49 
  50     static void testClient() throws Exception {
  51         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  52                 "-XX:+IgnoreUnrecognizedVMOptions",
  53                 "-client", "-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1", "-Xbatch",
  54                 "-XX:PerBytecodeRecompilationCutoff=10", "-XX:PerMethodRecompilationCutoff=10",
  55                 "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining",
  56                 "ContinuousCallSiteTargetChange$Test", "100");
  57 
  58         OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
  59 
  60         analyzer.shouldHaveExitValue(0);
  61 
  62         analyzer.shouldNotContain("made not compilable");
  63         analyzer.shouldNotContain("decompile_count > PerMethodRecompilationCutoff");
  64     }
  65 
  66     public static void main(String[] args) throws Exception {
  67         testServer();
  68         testClient();
  69     }
  70 
  71     static class Test {
  72         static final MethodType mt = MethodType.methodType(void.class);
  73         static final CallSite cs = new MutableCallSite(mt);
  74 
  75         static final MethodHandle mh = cs.dynamicInvoker();
  76 
  77         static void f() {
  78         }
  79 
  80         static void test1() throws Throwable {
  81             mh.invokeExact();
  82         }
  83 
  84         static void test2() throws Throwable {
  85             cs.getTarget().invokeExact();
  86         }
  87 
  88         static void iteration() throws Throwable {
  89             MethodHandle mh1 = MethodHandles.lookup().findStatic(ContinuousCallSiteTargetChange.Test.class, "f", mt);
  90             cs.setTarget(mh1);
  91             for (int i = 0; i < 20_000; i++) {
  92                 test1();
  93                 test2();
  94             }
  95         }
  96 
  97         public static void main(String[] args) throws Throwable {
  98             int iterations = Integer.parseInt(args[0]);
  99             for (int i = 0; i < iterations; i++) {
 100                 iteration();
 101             }
 102         }
 103     }
 104 }