1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5  * This code is free software; you can redistribute it and/or modify it
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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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 
24 /**
25  * @test
26  * @bug 6348045
27  * @summary GZipOutputStream/InputStream goes critical(calls JNI_Get*Critical)
28  * and causes slowness.  This test uses Deflater and Inflater directly.
29  * @key randomness
30  */
31 
32 import java.io.*;
33 import java.nio.*;
34 import java.util.*;
35 import java.util.zip.*;
36 
37 /**
38  * This test runs Inflater and Defalter in a number of simultaneous threads,
39  * validating that the deflated & then inflated data matches the original
40  * data.
41  */
42 public class FlaterTest extends Thread {
43     private static final int DATA_LEN = 1024 * 128;
44     private static byte[] data;
45 
46     // If true, print extra info.
47     private static final boolean debug = false;
48 
49     // Set of Flater threads running.
50     private static Set flaters =
51         Collections.synchronizedSet(new HashSet());
52 
53     /** Fill in {@code data} with random values. */
createData()54     static void createData() {
55         ByteBuffer bb = ByteBuffer.allocate(8);
56         ByteArrayOutputStream baos = new ByteArrayOutputStream();
57         for (int i = 0; i < DATA_LEN; i++) {
58             bb.putDouble(0, Math.random());
59             baos.write(bb.array(), 0, 8);
60         }
61         data = baos.toByteArray();
62         if (debug) System.out.println("data length is " + data.length);
63     }
64 
65     /** @return the length of the deflated {@code data}. */
getDeflatedLength()66     private static int getDeflatedLength() throws Throwable {
67         int rc = 0;
68         Deflater deflater = new Deflater();
69         deflater.setInput(data);
70         deflater.finish();
71         byte[] out = new byte[data.length];
72         rc = deflater.deflate(out);
73         deflater.end();
74         if (debug) System.out.println("deflatedLength is " + rc);
75         return rc;
76     }
77 
78     /** Compares given bytes with those in {@code data}.
79      * @throws Exception if given bytes don't match {@code data}.
80      */
validate(byte[] buf, int offset, int len)81     private static void validate(byte[] buf, int offset, int len) throws Exception {
82         for (int i = 0; i < len; i++ ) {
83             if (buf[i] != data[offset+i]) {
84                 throw new Exception("mismatch at " + (offset + i));
85             }
86         }
87     }
88 
realMain(String[] args)89     public static void realMain(String[] args) throws Throwable {
90         createData();
91         int numThreads = args.length > 0 ? Integer.parseInt(args[0]) : 5;
92         new FlaterTest().go(numThreads);
93     }
94 
go(int numThreads)95     synchronized private void go(int numThreads) throws Throwable {
96         int deflatedLength = getDeflatedLength();
97 
98         long time = System.currentTimeMillis();
99         for (int i = 0; i < numThreads; i++) {
100             Flater f = new Flater(deflatedLength);
101             flaters.add(f);
102             f.start();
103         }
104         while (flaters.size() != 0) {
105             try {
106                 Thread.currentThread().sleep(10);
107             } catch (InterruptedException ex) {
108                 unexpected(ex);
109             }
110         }
111         time = System.currentTimeMillis() - time;
112         System.out.println("Time needed for " + numThreads
113                            + " threads to deflate/inflate: " + time + " ms.");
114     }
115 
116     /** Deflates and inflates data. */
117     static class Flater extends Thread {
118         private final int deflatedLength;
119 
Flater(int length)120         private Flater(int length) {
121             this.deflatedLength = length;
122         }
123 
124         /** Deflates and inflates {@code data}. */
run()125         public void run() {
126             if (debug) System.out.println(getName() + " starting run()");
127             try {
128                 byte[] deflated = DeflateData(deflatedLength);
129                 InflateData(deflated);
130             } catch (Throwable t) {
131                 t.printStackTrace();
132                 fail(getName() + " failed");
133             } finally {
134                 flaters.remove(this);
135             }
136         }
137 
138         /** Returns a copy of {@code data} in deflated form. */
DeflateData(int length)139         private byte[] DeflateData(int length) throws Throwable {
140             Deflater deflater = new Deflater();
141             deflater.setInput(data);
142             deflater.finish();
143             byte[] out = new byte[length];
144             deflater.deflate(out);
145             return out;
146         }
147 
148         /** Inflate a byte array, comparing it with {@code data} during
149          * inflation.
150          * @throws Exception if inflated bytes don't match {@code data}.
151          */
InflateData(byte[] bytes)152         private void InflateData(byte[] bytes) throws Throwable {
153             Inflater inflater = new Inflater();
154             inflater.setInput(bytes, 0, bytes.length);
155             int len = 1024 * 8;
156             int offset = 0;
157             while (inflater.getRemaining() > 0) {
158                 byte[] buf = new byte[len];
159                 int inflated = inflater.inflate(buf, 0, len);
160                 validate(buf, offset, inflated);
161                 offset += inflated;
162             }
163         }
164     }
165 
166     //--------------------- Infrastructure ---------------------------
167     static volatile int passed = 0, failed = 0;
pass()168     static void pass() {passed++;}
fail()169     static void fail() {failed++; Thread.dumpStack();}
fail(String msg)170     static void fail(String msg) {System.out.println(msg); fail();}
unexpected(Throwable t)171     static void unexpected(Throwable t) {failed++; t.printStackTrace();}
check(boolean cond)172     static void check(boolean cond) {if (cond) pass(); else fail();}
equal(Object x, Object y)173     static void equal(Object x, Object y) {
174         if (x == null ? y == null : x.equals(y)) pass();
175         else fail(x + " not equal to " + y);}
main(String[] args)176     public static void main(String[] args) throws Throwable {
177         try {realMain(args);} catch (Throwable t) {unexpected(t);}
178         System.out.println("\nPassed = " + passed + " failed = " + failed);
179         if (failed > 0) throw new AssertionError("Some tests failed");}
180 }
181