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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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.
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
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22  */
23 
24 /*
25  * @test
26  * @bug 8151486 8218266
27  * @summary Call Class.forName() on the system classloader from a class loaded
28  *          from a custom classloader, using the current class's protection domain.
29  * @library /test/lib
30  * @modules java.base/jdk.internal.misc
31  * @build jdk.test.lib.Utils
32  *        jdk.test.lib.util.JarUtils
33  * @build ClassForName ProtectionDomainCacheTest
34  * @run main/othervm/policy=test.policy -Djava.security.manager ProtectionDomainCacheTest
35  */
36 
37 import java.net.URL;
38 import java.net.URLClassLoader;
39 import java.nio.file.FileSystems;
40 import java.nio.file.Files;
41 import java.nio.file.Path;
42 import java.nio.file.Paths;
43 import java.util.List;
44 import jdk.test.lib.Utils;
45 import jdk.test.lib.util.JarUtils;
46 import java.io.File;
47 
48 import jdk.test.lib.process.OutputAnalyzer;
49 import jdk.test.lib.process.ProcessTools;
50 
51 /*
52  * Create .jar, load ClassForName from .jar using a URLClassLoader
53  */
54 public class ProtectionDomainCacheTest {
55     static class Test {
56         private static final long TIMEOUT = (long)(5000.0 * Utils.TIMEOUT_FACTOR);
57         private static final String TESTCLASSES = System.getProperty("test.classes", ".");
58         private static final String CLASSFILENAME = "ClassForName.class";
59 
60         // Use a new classloader to load the ClassForName class.
loadAndRun(Path jarFilePath)61         public static void loadAndRun(Path jarFilePath)
62                 throws Exception {
63             ClassLoader classLoader = new URLClassLoader(
64                     new URL[]{jarFilePath.toUri().toURL()}) {
65                 @Override public String toString() { return "LeakedClassLoader"; }
66             };
67 
68             Class<?> loadClass = Class.forName("ClassForName", true, classLoader);
69             loadClass.newInstance();
70 
71             System.out.println("returning : " + classLoader);
72         }
73 
main(final String[] args)74         public static void main(final String[] args) throws Exception {
75             // Create a temporary .jar file containing ClassForName.class
76             Path testClassesDir = Paths.get(TESTCLASSES);
77             Path jarFilePath = Files.createTempFile("cfn", ".jar");
78             JarUtils.createJarFile(jarFilePath, testClassesDir, CLASSFILENAME);
79             jarFilePath.toFile().deleteOnExit();
80 
81             // Remove the ClassForName.class file that jtreg built, to make sure
82             // we're loading from the tmp .jar
83             Path classFile = FileSystems.getDefault().getPath(TESTCLASSES,
84                                                               CLASSFILENAME);
85             Files.delete(classFile);
86 
87             loadAndRun(jarFilePath);
88 
89             // Give the GC a chance to unload protection domains
90             for (int i = 0; i < 100; i++) {
91                 System.gc();
92             }
93             System.out.println("All Classloaders and protection domain cache entries successfully unloaded");
94         }
95     }
96 
main(String args[])97     public static void main(String args[]) throws Exception {
98         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
99                                       "-Djava.security.policy==" + System.getProperty("test.src") + File.separator + "test.policy",
100                                       "-Dtest.classes=" + System.getProperty("test.classes", "."),
101                                       "-XX:+UnlockDiagnosticVMOptions",
102                                       "-XX:VerifySubSet=dictionary",
103                                       "-XX:+VerifyAfterGC",
104                                       "-Xlog:gc+verify,protectiondomain=debug",
105                                       "-Djava.security.manager",
106                                       Test.class.getName());
107         OutputAnalyzer output = new OutputAnalyzer(pb.start());
108         output.shouldContain("PD in set is not alive");
109         output.shouldHaveExitValue(0);
110     }
111 }
112