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.java.lang;
  24 
  25 import org.openjdk.jmh.annotations.Benchmark;
  26 import org.openjdk.jmh.annotations.BenchmarkMode;
  27 import org.openjdk.jmh.annotations.CompilerControl;
  28 import org.openjdk.jmh.annotations.Mode;
  29 import org.openjdk.jmh.annotations.OutputTimeUnit;
  30 
  31 import java.util.concurrent.TimeUnit;
  32 
  33 /**
  34  * Tests Thread.getStackTrace()
  35  */
  36 @BenchmarkMode(Mode.AverageTime)
  37 @OutputTimeUnit(TimeUnit.NANOSECONDS)
  38 public class GetStackTrace {
  39 
  40     @Benchmark
  41     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
  42     public StackTraceElement[] depth0() {
  43         return Thread.currentThread().getStackTrace();
  44     }
  45 
  46     @Benchmark
  47     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
  48     public StackTraceElement[] depth1() {
  49         return depth0();
  50     }
  51 
  52     @Benchmark
  53     @CompilerControl(CompilerControl.Mode.DONT_INLINE)
  54     public StackTraceElement[] depth2() {
  55         return depth1();
  56     }
  57 }