1 /* 2 * Copyright (c) 2014 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 package org.openjdk.bench.vm.lang; 24 25 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.BenchmarkMode; 27 import org.openjdk.jmh.annotations.Mode; 28 import org.openjdk.jmh.annotations.OutputTimeUnit; 29 import org.openjdk.jmh.annotations.Scope; 30 import org.openjdk.jmh.annotations.State; 31 import org.openjdk.jmh.infra.Blackhole; 32 33 import java.util.concurrent.TimeUnit; 34 35 /** 36 * Tests throwing exceptions. 37 */ 38 @BenchmarkMode(Mode.AverageTime) 39 @OutputTimeUnit(TimeUnit.NANOSECONDS) 40 @State(Scope.Thread) 41 public class Throw { 42 43 public static boolean alwaysTrue = true; 44 private static Object nullObject = null; 45 public Object useObject = new Object(); 46 47 @Benchmark 48 public void throwSyncException(Blackhole bh) { 49 try { 50 throwingMethod(); 51 } catch (Exception ex) { 52 bh.consume(useObject); 53 } 54 } 55 56 @Benchmark 57 public void throwASyncException(Blackhole bh) { 58 try { 59 throwNullpointer(); 60 } catch (Exception ex) { 61 bh.consume(useObject); 62 } 63 } 64 65 @Benchmark 66 public void throwSyncExceptionUseException(Blackhole bh) { 67 try { 68 throwingMethod(); 69 } catch (Exception ex) { 70 bh.consume(ex); 71 } 72 } 73 74 @Benchmark 75 public void throwSyncExceptionUseMessage(Blackhole bh) { 76 try { 77 throwingMethod(); 78 } catch (Exception ex) { 79 bh.consume(ex.getMessage()); 80 } 81 } 82 83 @Benchmark 84 public void throwSyncExceptionUseStacktrace(Blackhole bh) { 85 try { 86 throwingMethod(); 87 } catch (Exception ex) { 88 bh.consume(ex.getStackTrace()); 89 } 90 } 91 92 @Benchmark 93 public void throwWith16Frames(Blackhole bh) { 94 try { 95 throwingMethod(16); 96 } catch (Exception ex) { 97 bh.consume(useObject); 98 } 99 } 100 101 @Benchmark 102 public void throwWith32Frames(Blackhole bh) { 103 try { 104 throwingMethod(32); 105 } catch (Exception ex) { 106 bh.consume(useObject); 107 } 108 } 109 110 @Benchmark 111 public void throwWith64Frames(Blackhole bh) { 112 try { 113 throwingMethod(64); 114 } catch (Exception ex) { 115 bh.consume(useObject); 116 } 117 } 118 119 public void throwingMethod() throws Exception { 120 if (alwaysTrue) { 121 throw new Exception(); 122 } 123 } 124 125 public void throwingMethod(int i) throws Exception { 126 if (i == 0) { 127 throw new Exception(); 128 } 129 throwingMethod(i - 1); 130 } 131 132 public void throwNullpointer() { 133 nullObject.hashCode(); 134 } 135 }