1 /*
 2  * Copyright (c) 2022, 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.foreign;
24 
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.BenchmarkMode;
27 import org.openjdk.jmh.annotations.Fork;
28 import org.openjdk.jmh.annotations.Measurement;
29 import org.openjdk.jmh.annotations.Mode;
30 import org.openjdk.jmh.annotations.OutputTimeUnit;
31 import org.openjdk.jmh.annotations.Scope;
32 import org.openjdk.jmh.annotations.State;
33 import org.openjdk.jmh.annotations.Warmup;
34 
35 import java.lang.foreign.Arena;
36 import java.lang.foreign.Linker;
37 import java.lang.foreign.FunctionDescriptor;
38 import java.lang.foreign.MemorySegment;
39 import java.lang.invoke.MethodHandle;
40 import java.lang.invoke.MethodType;
41 import java.util.concurrent.TimeUnit;
42 
43 import static java.lang.invoke.MethodHandles.lookup;
44 
45 @BenchmarkMode(Mode.AverageTime)
46 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
47 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
48 @State(Scope.Benchmark)
49 @OutputTimeUnit(TimeUnit.MICROSECONDS)
50 @Fork(value = 3, jvmArgsAppend = { "--enable-native-access=ALL-UNNAMED" })
51 public class LinkUpcall extends CLayouts {
52 
53     static final Linker LINKER = Linker.nativeLinker();
54     static final MethodHandle BLANK;
55     static final FunctionDescriptor BLANK_DESC = FunctionDescriptor.ofVoid();
56 
57     static {
58         try {
59             BLANK = lookup().findStatic(LinkUpcall.class, "blank", MethodType.methodType(void.class));
60         } catch (ReflectiveOperationException e) {
61             throw new ExceptionInInitializerError(e);
62         }
63     }
64 
65     @Benchmark
66     public MemorySegment link_blank() {
67         try (Arena arena = Arena.ofConfined()) {
68             return LINKER.upcallStub(BLANK, BLANK_DESC, arena);
69         }
70     }
71 
72     static void blank() {}
73 }