1 /*

     2  * Copyright (c) 2014, 2019 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package org.openjdk.bench.java.security;

    26 

    27 import org.openjdk.jmh.annotations.Benchmark;

    28 import org.openjdk.jmh.annotations.BenchmarkMode;

    29 import org.openjdk.jmh.annotations.Mode;

    30 import org.openjdk.jmh.annotations.OutputTimeUnit;

    31 import org.openjdk.jmh.annotations.Param;

    32 import org.openjdk.jmh.annotations.Scope;

    33 import org.openjdk.jmh.annotations.State;

    34 

    35 import java.security.AccessControlContext;

    36 import java.security.AccessController;

    37 import java.security.PrivilegedAction;

    38 import java.util.concurrent.TimeUnit;

    39 

    40 /**

    41  * Benchmark measuring AccessController.getContext

    42  */

    43 @BenchmarkMode(Mode.AverageTime)

    44 @OutputTimeUnit(TimeUnit.NANOSECONDS)

    45 @State(Scope.Thread)

    46 public abstract class GetContext {

    47 

    48     public static class Top extends GetContext {

    49 

    50         @Benchmark

    51         public AccessControlContext testNonPriv() {

    52             return AccessController.getContext();

    53         }

    54 

    55         @Benchmark

    56         public AccessControlContext testPriv() {

    57             PrivilegedAction<AccessControlContext> pa = () -> AccessController.getContext();

    58             return AccessController.doPrivileged(pa);

    59         }

    60     }

    61 

    62     public static class Deep extends GetContext {

    63 

    64         @Param({"2", "50"})

    65         int depth;

    66 

    67         private AccessControlContext recurse(int depth) {

    68             if (depth > 0) {

    69                 return recurse(depth - 1);

    70             } else {

    71                 return AccessController.getContext();

    72             }

    73         }

    74 

    75         @Benchmark

    76         public AccessControlContext testNonPrivRecurse() {

    77             return recurse(depth);

    78         }

    79 

    80         @Benchmark

    81         public AccessControlContext testPrivInline() {

    82             PrivilegedAction<AccessControlContext> pa = () -> recurse(depth);

    83             return AccessController.doPrivileged(pa);

    84         }

    85     }

    86 }