102 lines
3.7 KiB
Java
102 lines
3.7 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test id=Arena_allocateFrom
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* @run main/othervm/timeout=5 --enable-native-access=ALL-UNNAMED -Xlog:class+init TestDeadlock Arena
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*/
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/*
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* @test id=FileChannel_map
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* @run main/othervm/timeout=5 --enable-native-access=ALL-UNNAMED -Xlog:class+init TestDeadlock FileChannel
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*/
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import java.lang.foreign.*;
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import java.io.IOException;
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import java.nio.channels.FileChannel;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.StandardOpenOption;
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import java.util.concurrent.CountDownLatch;
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public class TestDeadlock {
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public static void main(String[] args) throws Throwable {
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CountDownLatch latch = new CountDownLatch(2);
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Runnable tester = switch (args[0]) {
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case "Arena" -> () -> {
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Arena arena = Arena.global();
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arena.scope(); // init ArenaImpl
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ValueLayout.JAVA_INT.byteSize(); // init ValueLayout (and impls)
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latch.countDown();
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try {
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latch.await();
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} catch(InterruptedException e) {
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throw new RuntimeException(e);
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}
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// Access ArenaImpl -> NativeMemorySegmentImpl -> MemorySegment
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arena.allocateFrom(ValueLayout.JAVA_INT, 42);
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};
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case "FileChannel" -> () -> {
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try {
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Arena arena = Arena.global();
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Path p = Files.createFile(Path.of("test.out"));
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try (FileChannel channel = FileChannel.open(p, StandardOpenOption.READ, StandardOpenOption.WRITE)) {
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channel.map(FileChannel.MapMode.READ_WRITE, 0, 4); // create MappedByteBuffer to initialize other things
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latch.countDown();
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latch.await();
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// Access MappedMemorySegmentImpl -> MemorySegment
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channel.map(FileChannel.MapMode.READ_WRITE, 0, 4, arena);
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}
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} catch(InterruptedException | IOException e) {
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throw new RuntimeException(e);
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}
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};
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default -> throw new IllegalArgumentException("Unknown test selection: " + args[0]);
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};
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Thread t1 = Thread.ofPlatform().start(tester);
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Thread t2 = Thread.ofPlatform().start(() -> {
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latch.countDown();
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try {
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latch.await();
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} catch(InterruptedException e) {
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throw new RuntimeException(e);
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}
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// Access MemorySegment -> NativeMemorySegmentImpl
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MemorySegment.ofAddress(42);
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});
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// wait for potential deadlock
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t1.join();
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t2.join();
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// all good
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}
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}
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