1 /*
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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
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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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22  */
23 
24 /*
25  * @test
26  * @bug 4735126
27  * @summary (cl) ClassLoader.loadClass locks all instances in chain when delegating
28  * @modules java.base/java.lang:open
29  *          jdk.compiler
30  * @library /test/lib
31  * @build jdk.test.lib.compiler.CompilerUtils
32  * @run main/othervm -Xlog:class+load DelegateTest one-way
33  * @run main/othervm -Xlog:class+load DelegateTest cross
34  */
35 
36 import java.io.File;
37 import java.net.MalformedURLException;
38 import java.net.URL;
39 import java.nio.file.Path;
40 import java.nio.file.Paths;
41 
42 import jdk.test.lib.compiler.CompilerUtils;
43 
44 public class DelegateTest implements Runnable {
45 
46     private static final Path TEST_DIR = Paths.get(System.getProperty("user.dir", "."));
47     private static final Path SRC_DIR = Paths.get(System.getProperty("test.src"), "src");
48 
49     private String id;
50     private DelegatingLoader dl;
51     private String startClass;
52 
53     private static DelegatingLoader saLoader, sbLoader;
54 
log(String line)55     public static void log(String line) {
56         System.out.println(line);
57     }
58 
main(String[] args)59     public static void main(String[] args) throws Exception {
60         if (!CompilerUtils.compile(SRC_DIR, TEST_DIR)) {
61             throw new RuntimeException("Failed to compile "
62                     + SRC_DIR.toAbsolutePath().toString());
63         }
64 
65         URL[] url = new URL[1];
66         try {
67             url[0] = new URL("file://" + TEST_DIR + File.separator);
68         } catch (MalformedURLException e) {
69             e.printStackTrace();
70         }
71         // Set up Classloader delegation hierarchy
72         saLoader = new DelegatingLoader(url);
73         sbLoader = new DelegatingLoader(url);
74 
75         String[] saClasses = { "comSA.SupBob", "comSA.Alice" };
76         String[] sbClasses = { "comSB.SupAlice", "comSB.Bob" };
77 
78         saLoader.setDelegate(sbClasses, sbLoader);
79         sbLoader.setDelegate(saClasses, saLoader);
80 
81         // test one-way delegate
82         String testType = args[0];
83         if (testType.equals("one-way")) {
84             test("comSA.Alice", "comSA.SupBob");
85         } else if (testType.equals("cross")) {
86             // test cross delegate
87             test("comSA.Alice", "comSB.Bob");
88         } else {
89             System.out.println("ERROR: unsupported - " + testType);
90         }
91     }
92 
test(String clsForSA, String clsForSB)93     private static void test(String clsForSA, String clsForSB) throws InterruptedException {
94         DelegateTest ia = new DelegateTest("SA", saLoader, clsForSA);
95         DelegateTest ib = new DelegateTest("SB", sbLoader, clsForSB);
96         Thread ta = new Thread(ia);
97         Thread tb = new Thread(ib);
98         ta.start();
99         tb.start();
100         ta.join();
101         tb.join();
102     }
103 
sleep()104     public static void sleep() {
105         try {
106             Thread.sleep(500);
107         } catch (InterruptedException e) {
108             e.printStackTrace();
109             log("Thread interrupted");
110         }
111     }
112 
DelegateTest(String id, DelegatingLoader dl, String startClass)113     private DelegateTest(String id, DelegatingLoader dl, String startClass) {
114         this.id = id;
115         this.dl = dl;
116         this.startClass = startClass;
117     }
118 
run()119     public void run() {
120         log("Spawned thread " + id + " running");
121         try {
122             // To mirror the WAS deadlock, need to ensure class load
123             // is routed via the VM.
124             Class.forName(startClass, true, dl);
125         } catch (ClassNotFoundException e) {
126             e.printStackTrace();
127         }
128         log("Thread " + id + " terminating");
129     }
130 }
131