1 /* 2 * Copyright (c) 2018, 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 26 package jdk.jfr.event.io; 27 28 import static jdk.test.lib.Asserts.fail; 29 30 import java.io.File; 31 import java.io.IOException; 32 import java.io.RandomAccessFile; 33 import java.nio.ByteBuffer; 34 import java.nio.channels.FileChannel; 35 import java.time.Duration; 36 import java.util.ArrayList; 37 import java.util.List; 38 39 import jdk.jfr.Recording; 40 import jdk.jfr.consumer.RecordedEvent; 41 import jdk.test.lib.jfr.Events; 42 43 /* 44 * @test 45 * @key jfr 46 * @library /test/lib /test/jdk 47 * @run main/othervm jdk.jfr.event.io.TestFileReadOnly 48 */ 49 public class TestFileReadOnly { 50 51 public static void main(String[] args) throws Throwable { 52 File tmp = File.createTempFile("TestFileReadOnly", ".tmp", new File(".")); 53 tmp.deleteOnExit(); 54 Recording recording = new Recording(); 55 List<IOEvent> expectedEvents = new ArrayList<>(); 56 57 recording.enable(IOEvent.EVENT_FILE_READ).withThreshold(Duration.ofMillis(0)); 58 recording.enable(IOEvent.EVENT_FILE_WRITE).withThreshold(Duration.ofMillis(0)); 59 recording.start(); 60 61 final byte[] buf = { 1, 2, 3 }; 62 63 // Create the file. 64 try (RandomAccessFile f = new RandomAccessFile(tmp, "rw")) { 65 f.write(buf); 66 expectedEvents.add(IOEvent.createFileWriteEvent(buf.length, tmp)); 67 } 68 69 // Reopen the file as ReadOnly and try to write to it. 70 // Should generate an event with bytesWritten = -1. 71 try (RandomAccessFile f = new RandomAccessFile(tmp, "r")) { 72 try { 73 f.write(buf); 74 fail("No exception for ReadOnly File"); 75 } catch (IOException e) { 76 // Expected exception 77 expectedEvents.add(IOEvent.createFileWriteEvent(-1, tmp)); 78 } 79 } 80 81 // Try to write to read-only FileChannel. 82 try (RandomAccessFile f = new RandomAccessFile(tmp, "r"); FileChannel ch = f.getChannel()) { 83 ByteBuffer writeBuf = ByteBuffer.allocateDirect(buf.length); 84 writeBuf.put(buf); 85 writeBuf.flip(); 86 ch.position(0); 87 try { 88 ch.write(writeBuf); 89 fail("No exception for ReadOnly FileChannel"); 90 } catch (java.nio.channels.NonWritableChannelException e) { 91 // Expected exception 92 expectedEvents.add(IOEvent.createFileWriteEvent(-1, tmp)); 93 } 94 } 95 96 recording.stop(); 97 List<RecordedEvent> events = Events.fromRecording(recording); 98 IOHelper.verifyEqualsInOrder(events, expectedEvents); 99 } 100 }