1 /* 2 * Copyright (c) 2010, 2014, 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 24 /* @test 25 * @bug 7007609 7009618 26 * @summary Check that ZipFile objects are always collected 27 */ 28 29 import java.io.*; 30 import java.util.Random; 31 import java.util.zip.*; 32 import java.util.concurrent.CountDownLatch; 33 34 public class FinalizeZipFile { 35 36 private final static CountDownLatch finalizersDone = new CountDownLatch(3); 37 38 private static class InstrumentedZipFile extends ZipFile { 39 40 public InstrumentedZipFile(File f) throws Exception { 41 super(f); 42 System.out.printf("Using %s%n", f.getPath()); 43 } 44 @Override 45 protected void finalize() throws IOException { 46 System.out.printf("Killing %s%n", getName()); 47 super.finalize(); 48 finalizersDone.countDown(); 49 } 50 } 51 52 private static void makeGarbage() throws Throwable { 53 final Random rnd = new Random(); 54 // Create some ZipFiles. 55 // Find some .jar files in test directory. 56 final File testdir = new File(System.getProperty("test.src", ".")); 57 check(testdir.isDirectory()); 58 final File[] jars = testdir.listFiles( 59 new FilenameFilter() { 60 public boolean accept(File dir, String name) { 61 return name.endsWith(".jar");}}); 62 check(jars.length > 1); 63 64 new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close(); 65 new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close(); 66 67 // Create a ZipFile and get an input stream from it 68 for (int i = 0; i < jars.length + 10; i++) { 69 ZipFile zf = new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]); 70 ZipEntry ze = zf.getEntry("META-INF/MANIFEST.MF"); 71 if (ze != null) { 72 InputStream is = zf.getInputStream(ze); 73 break; 74 } 75 } 76 } 77 78 public static void realMain(String[] args) throws Throwable { 79 makeGarbage(); 80 81 System.gc(); 82 finalizersDone.await(); 83 84 // Not all ZipFiles were collected? 85 equal(finalizersDone.getCount(), 0L); 86 } 87 88 //--------------------- Infrastructure --------------------------- 89 static volatile int passed = 0, failed = 0; 90 static void pass() {passed++;} 91 static void fail() {failed++; Thread.dumpStack();} 92 static void fail(String msg) {System.out.println(msg); fail();} 93 static void unexpected(Throwable t) {failed++; t.printStackTrace();} 94 static void check(boolean cond) {if (cond) pass(); else fail();} 95 static void equal(Object x, Object y) { 96 if (x == null ? y == null : x.equals(y)) pass(); 97 else fail(x + " not equal to " + y);} 98 public static void main(String[] args) throws Throwable { 99 try {realMain(args);} catch (Throwable t) {unexpected(t);} 100 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); 101 if (failed > 0) throw new AssertionError("Some tests failed");} 102 }