J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * |
| 26 | * @test |
| 27 | * @bug 6322678 |
| 28 | * @summary Test for making sure that FIS/FOS.finalize() will |
| 29 | * not disturb the FD that is still in use. |
| 30 | */ |
| 31 | |
| 32 | import java.io.*; |
| 33 | import java.nio.*; |
| 34 | import java.nio.channels.*; |
| 35 | |
| 36 | public class Finalize { |
| 37 | |
| 38 | static byte data[] = new byte[] {48, 49, 50, 51, 52, 53, 54, 55, 56, 57,}; |
| 39 | static String inFileName = "fd-in-test.txt"; |
| 40 | static String outFileName = "fd-out-test.txt"; |
| 41 | static File inFile; |
| 42 | static File outFile; |
| 43 | |
| 44 | public static void main(String[] args) |
| 45 | throws Exception { |
| 46 | Thread.sleep(5000); |
| 47 | |
| 48 | inFile= new File(System.getProperty("test.dir", "."), |
| 49 | inFileName); |
| 50 | inFile.createNewFile(); |
| 51 | inFile.deleteOnExit(); |
| 52 | writeToInFile(); |
| 53 | |
| 54 | doFileInputStream(); |
| 55 | |
| 56 | outFile = new File(System.getProperty("test.dir", "."), |
| 57 | outFileName); |
| 58 | outFile.createNewFile(); |
| 59 | outFile.deleteOnExit(); |
| 60 | |
| 61 | doFileOutputStream(); |
| 62 | doRandomAccessFile(); |
| 63 | doFileChannel(); |
| 64 | } |
| 65 | |
| 66 | private static void doFileInputStream() throws Exception { |
| 67 | |
| 68 | /* Create initial FIS for file */ |
| 69 | FileInputStream fis1 = new FileInputStream(inFile); |
| 70 | |
| 71 | /* Get the FileDescriptor from the fis */ |
| 72 | FileDescriptor fd = fis1.getFD(); |
| 73 | |
| 74 | /* |
| 75 | * Create a new FIS based on the existing FD |
| 76 | * (so the two FIS's share the same native fd) |
| 77 | */ |
| 78 | FileInputStream fis2 = new FileInputStream(fd); |
| 79 | |
| 80 | /* allow fis1 to be gc'ed */ |
| 81 | fis1 = null; |
| 82 | int ret = 0; |
| 83 | |
| 84 | /* encourage gc */ |
| 85 | System.gc(); |
| 86 | Thread.sleep(200); |
| 87 | |
| 88 | while((ret = fis2.read()) != -1 ) { |
| 89 | /* |
| 90 | * read from fis2 - when fis1 is gc'ed and finalizer is run, |
| 91 | * read should not fail |
| 92 | */ |
| 93 | System.out.println("read from fis2:" + ret); |
| 94 | } |
| 95 | fis2.close(); |
| 96 | } |
| 97 | |
| 98 | private static void writeToInFile() throws IOException { |
| 99 | FileOutputStream out = new FileOutputStream(inFile); |
| 100 | out.write(data); |
| 101 | out.close(); |
| 102 | } |
| 103 | |
| 104 | private static void doFileOutputStream() |
| 105 | throws Exception { |
| 106 | |
| 107 | System.out.println("--------FileOutputStream Test Started----------"); |
| 108 | |
| 109 | /*Create initial FIS for file */ |
| 110 | FileOutputStream fos1 = new FileOutputStream(outFile); |
| 111 | |
| 112 | /* Get the FileDescriptor from the fos */ |
| 113 | FileDescriptor fd = fos1.getFD(); |
| 114 | FileOutputStream fos2 = new FileOutputStream(fd); |
| 115 | |
| 116 | /* allow fos1 to be gc'ed */ |
| 117 | fos1 = null; |
| 118 | |
| 119 | /* encourage gc */ |
| 120 | System.gc(); |
| 121 | Thread.sleep(200); |
| 122 | |
| 123 | /* |
| 124 | * write to fos2 - when fos1 is gc'ed and finalizer is run, |
| 125 | * write to fos2 should not fail |
| 126 | */ |
| 127 | fos2.write(data); |
| 128 | System.out.println("wrote:" + data.length + " bytes to fos2"); |
| 129 | fos2.close(); |
| 130 | |
| 131 | System.out.println("--------FileOutputStream Test Over----------"); |
| 132 | System.out.println(); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | private static void doRandomAccessFile() |
| 137 | throws Exception { |
| 138 | |
| 139 | System.out.println("--------RandomAccessFile Read Test Started----------"); |
| 140 | |
| 141 | // Create initial FIS for file |
| 142 | RandomAccessFile raf = new RandomAccessFile(inFile, "r"); |
| 143 | |
| 144 | /* Get the FileDescriptor from the fis */ |
| 145 | FileDescriptor fd = raf.getFD(); |
| 146 | |
| 147 | /* Create a new FIS based on the existing FD |
| 148 | * (so the two FIS's share the same native fd) |
| 149 | */ |
| 150 | FileInputStream fis = new FileInputStream(fd); |
| 151 | |
| 152 | /* allow fis to be gc'ed */ |
| 153 | fis = null; |
| 154 | int ret = 0; |
| 155 | |
| 156 | /* encourage gc */ |
| 157 | System.gc(); |
| 158 | Thread.sleep(50); |
| 159 | |
| 160 | /* |
| 161 | * read from raf - when fis is gc'ed and finalizer is run, |
| 162 | * read from raf should not fail |
| 163 | */ |
| 164 | while((ret = raf.read()) != -1 ) { |
| 165 | System.out.println("read from raf:" + ret); |
| 166 | } |
| 167 | raf.close(); |
| 168 | Thread.sleep(200); |
| 169 | |
| 170 | System.out.println("--------RandomAccessFile Write Test Started----------"); |
| 171 | System.out.println(); |
| 172 | |
| 173 | raf = new RandomAccessFile(outFile, "rw"); |
| 174 | fd = raf.getFD(); |
| 175 | FileOutputStream fos = new FileOutputStream(fd); |
| 176 | |
| 177 | /* allow fos to be gc'ed */ |
| 178 | fos = null; |
| 179 | |
| 180 | /* encourage gc */ |
| 181 | System.gc(); |
| 182 | Thread.sleep(200); |
| 183 | |
| 184 | /* |
| 185 | * write to raf - when fos is gc'ed and finalizer is run, |
| 186 | * write to raf should not fail |
| 187 | */ |
| 188 | raf.write(data); |
| 189 | System.out.println("wrote:" + data.length + " bytes to raf"); |
| 190 | raf.close(); |
| 191 | |
| 192 | System.out.println("--------RandomAccessFile Write Test Over----------"); |
| 193 | System.out.println(); |
| 194 | } |
| 195 | |
| 196 | private static void doFileChannel() throws Exception { |
| 197 | |
| 198 | System.out.println("--------FileChannel Read Test Started----------"); |
| 199 | System.out.println(); |
| 200 | |
| 201 | FileInputStream fis1 = new FileInputStream(inFile); |
| 202 | |
| 203 | /* Get the FileDescriptor from the fis */ |
| 204 | FileDescriptor fd = fis1.getFD(); |
| 205 | |
| 206 | /* Create a new FIS based on the existing FD |
| 207 | * (so the two FIS's share the same native fd) |
| 208 | */ |
| 209 | FileInputStream fis2 = new FileInputStream(fd); |
| 210 | FileChannel fc2 = fis2.getChannel(); |
| 211 | |
| 212 | /** |
| 213 | * Encourage the GC |
| 214 | */ |
| 215 | fis1 = null; |
| 216 | System.gc(); |
| 217 | Thread.sleep(200); |
| 218 | |
| 219 | int ret = 1; |
| 220 | ByteBuffer bb = ByteBuffer.allocateDirect(1); |
| 221 | ret = fc2.read(bb); |
| 222 | System.out.println("read " + ret + " bytes from fc2:"); |
| 223 | fc2.close(); |
| 224 | |
| 225 | System.out.println("--------FileChannel Read Test Over----------"); |
| 226 | System.out.println(); |
| 227 | |
| 228 | System.out.println("--------FileChannel Write Test Started----------"); |
| 229 | |
| 230 | FileOutputStream fos1 = new FileOutputStream(outFile); |
| 231 | |
| 232 | /* Get the FileDescriptor from the fos */ |
| 233 | fd = fos1.getFD(); |
| 234 | FileOutputStream fos2 = new FileOutputStream(fd); |
| 235 | fc2 = fos2.getChannel(); |
| 236 | |
| 237 | /** |
| 238 | * Encourage the GC |
| 239 | */ |
| 240 | fos1 = null; |
| 241 | System.gc(); |
| 242 | Thread.sleep(200); |
| 243 | |
| 244 | /* |
| 245 | * write to fc2 - when fos1 is gc'ed and finalizer is run, |
| 246 | * write to fc2 should not fail |
| 247 | */ |
| 248 | bb = ByteBuffer.allocateDirect(data.length); |
| 249 | bb = bb.put(data); |
| 250 | bb = (ByteBuffer) bb.flip(); |
| 251 | ret = fc2.write(bb); |
| 252 | System.out.println("Wrote:" + ret + " bytes to fc2"); |
| 253 | fc2.close(); |
| 254 | |
| 255 | System.out.println("--------Channel Write Test Over----------"); |
| 256 | } |
| 257 | } |