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 }