1 /*
2 * Copyright (c) 2010, 2011, 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.nio.*;
31 import java.util.Random;
32 import java.util.zip.*;
33 import java.util.concurrent.CountDownLatch;
34 import java.util.concurrent.TimeUnit;
35
36 public class FinalizeZipFile {
37
38 private final static CountDownLatch finalizersDone = new CountDownLatch(3);
39
40 private static class InstrumentedZipFile extends ZipFile {
41
42 public InstrumentedZipFile(File f) throws Exception {
43 super(f);
44 System.out.printf("Using %s%n", f.getPath());
45 }
46 protected void finalize() throws IOException {
47 System.out.printf("Killing %s%n", getName());
48 super.finalize();
49 finalizersDone.countDown();
50 }
51 }
52
53 private static void makeGarbage() throws Throwable {
54 final Random rnd = new Random();
55 final String javaHome = System.getProperty("java.home");
56 // Create some ZipFiles.
57 // Find some .jar files in JDK's lib directory.
58 final File lib = new File(javaHome, "lib");
59 check(lib.isDirectory());
60 final File[] jars = lib.listFiles(
61 new FilenameFilter() {
62 public boolean accept(File dir, String name) {
63 return name.endsWith(".jar");}});
64 check(jars.length > 1);
65
66 new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close();
67 new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close();
68
69 // Create a ZipFile and get an input stream from it
70 ZipFile zf = new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]);
71 ZipEntry ze = zf.getEntry("META-INF/MANIFEST.MF");
72 InputStream is = zf.getInputStream(ze);
73 }
74
75 public static void realMain(String[] args) throws Throwable {
76 makeGarbage();
77
78 System.gc();
79 finalizersDone.await(5, TimeUnit.SECONDS);
80
81 // Not all ZipFiles were collected?
82 equal(finalizersDone.getCount(), 0L);
83 }
84
85 //--------------------- Infrastructure ---------------------------
86 static volatile int passed = 0, failed = 0;
87 static void pass() {passed++;}
88 static void fail() {failed++; Thread.dumpStack();}
89 static void fail(String msg) {System.out.println(msg); fail();}
90 static void unexpected(Throwable t) {failed++; t.printStackTrace();}
91 static void check(boolean cond) {if (cond) pass(); else fail();}
92 static void equal(Object x, Object y) {
93 if (x == null ? y == null : x.equals(y)) pass();
94 else fail(x + " not equal to " + y);}
95 public static void main(String[] args) throws Throwable {
96 try {realMain(args);} catch (Throwable t) {unexpected(t);}
97 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
98 if (failed > 0) throw new AssertionError("Some tests failed");}
99 }
100