1 /*
2 * Copyright (c) 2020, 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 /*
25 * @test
26 * @bug 8187305
27 * @summary Tests logging of shared library loads and unloads.
28 * @library /runtime/testlibrary /test/lib
29 * @build sun.hotspot.WhiteBox
30 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
31 * @run main LoadLibraryTest
32 */
33
34 import java.io.File;
35 import java.io.FileInputStream;
36 import java.io.IOException;
37 import java.nio.ByteBuffer;
38 import java.nio.channels.FileChannel;
39
40 import jdk.test.lib.process.ProcessTools;
41 import jdk.test.lib.process.OutputAnalyzer;
42 import jtreg.SkippedException;
43
44 import sun.hotspot.WhiteBox;
45
46 public class LoadLibraryTest {
47
48 public static final String CLASS_NAME = "LoadLibraryTest$LoadLibraryClass";
49
50 private static class LoadLibrary {
51
52 static String testClasses;
53
54 public static void runTest() throws Exception {
55 // create a classloader and load a class that loads a library.
56 MyClassLoader myLoader = new MyClassLoader();
57 Class<?> c = Class.forName(CLASS_NAME, true, myLoader);
58 }
59
60 public static void main(String[] args) throws Exception {
61 testClasses = args[0];
62 runTest();
63 ClassUnloadCommon.triggerUnloading();
64 WhiteBox wb = WhiteBox.getWhiteBox();
65 if (!wb.isClassAlive(CLASS_NAME)) {
66 System.out.println("Class LoadLibraryClass was unloaded");
67 while (true) {
68 try {
69 System.loadLibrary("LoadLibraryClass");
70 // Able to load the library with this class's class loader
71 // so it must have been unloaded by myLoader.
72 break;
73 } catch(java.lang.UnsatisfiedLinkError e) {
74 if (e.getMessage().contains("already loaded in another classloader")) {
75 // Library has not been unloaded yet, so wait a little and check again.
76 Thread.sleep(10);
77 } else {
78 throw new RuntimeException(
79 "Unexpected UnsatisfiedLinkError: " + e.getMessage());
80 }
81 }
82 }
83 }
84 }
85
86
87 public static class MyClassLoader extends ClassLoader {
88
89 static ByteBuffer readClassFile(String name) {
90 File f = new File(testClasses, name);
91 try (FileInputStream fin = new FileInputStream(f);
92 FileChannel fc = fin.getChannel())
93 {
94 return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
95 } catch (IOException e) {
96 throw new RuntimeException("Can't open file: " + name +
97 ", exception: " + e.toString());
98 }
99 }
100
101 protected Class<?> loadClass(String name, boolean resolve)
102 throws ClassNotFoundException {
103 Class<?> c;
104 if (!CLASS_NAME.equals(name)) {
105 c = super.loadClass(name, resolve);
106 } else {
107 // should not delegate to the system class loader
108 c = findClass(name);
109 if (resolve) {
110 resolveClass(c);
111 }
112 }
113 return c;
114 }
115
116 protected Class<?> findClass(String name) throws ClassNotFoundException {
117 if (!CLASS_NAME.equals(name)) {
118 throw new ClassNotFoundException("Unexpected class: " + name);
119 }
120 return defineClass(name, readClassFile(name + ".class"), null);
121 }
122 } // MyClassLoader
123 }
124
125
126 static class LoadLibraryClass {
127 static {
128 System.loadLibrary("LoadLibraryClass");
129 nTest();
130 }
131 native static void nTest();
132 }
133
134
135 public static void main(String... args) throws Exception {
136 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
137 "-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions",
138 "-XX:+WhiteBoxAPI", "-Xmn8m", "-Xlog:library=info",
139 "-Djava.library.path=" + System.getProperty("java.library.path"),
140 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
141 "LoadLibraryTest$LoadLibrary", System.getProperty("test.classes"));
142
143 OutputAnalyzer output = new OutputAnalyzer(pb.start());
144 output.shouldHaveExitValue(0);
145 output.shouldContain("Loaded library");
146 output.shouldContain("Found Java_LoadLibraryTest_00024LoadLibraryClass_nTest__ in library");
147 if (output.getOutput().contains("Class LoadLibraryClass was unloaded")) {
148 output.shouldContain("Unloaded library with handle");
149 } else {
150 throw new SkippedException(
151 "Skipping check for library unloading logging because no unloading occurred");
152 }
153 }
154 }