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/*
* Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8187305
* @summary Tests logging of shared library loads and unloads.
* @requires vm.flagless
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main LoadLibraryTest
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jtreg.SkippedException;
import jdk.test.whitebox.WhiteBox;
import jdk.test.lib.classloader.ClassUnloadCommon;
public class LoadLibraryTest {
public static final String CLASS_NAME = "LoadLibraryTest$LoadLibraryClass";
private static class LoadLibrary {
static String testClasses;
public static void runTest() throws Exception {
// create a classloader and load a class that loads a library.
MyClassLoader myLoader = new MyClassLoader();
Class<?> c = Class.forName(CLASS_NAME, true, myLoader);
}
public static void main(String[] args) throws Exception {
testClasses = args[0];
runTest();
ClassUnloadCommon.triggerUnloading();
WhiteBox wb = WhiteBox.getWhiteBox();
if (!wb.isClassAlive(CLASS_NAME)) {
System.out.println("Class LoadLibraryClass was unloaded");
while (true) {
try {
System.loadLibrary("LoadLibraryClass");
// Able to load the library with this class's class loader
// so it must have been unloaded by myLoader.
break;
} catch(java.lang.UnsatisfiedLinkError e) {
if (e.getMessage().contains("already loaded in another classloader")) {
// Library has not been unloaded yet, so wait a little and check again.
Thread.sleep(10);
} else {
throw new RuntimeException(
"Unexpected UnsatisfiedLinkError: " + e.getMessage());
}
}
}
}
}
public static class MyClassLoader extends ClassLoader {
protected Class<?> loadClass(String name, boolean resolve)
throws ClassNotFoundException {
Class<?> c;
if (!CLASS_NAME.equals(name)) {
c = super.loadClass(name, resolve);
} else {
// should not delegate to the system class loader
c = findClass(name);
if (resolve) {
resolveClass(c);
}
}
return c;
}
protected Class<?> findClass(String name) throws ClassNotFoundException {
if (!CLASS_NAME.equals(name)) {
throw new ClassNotFoundException("Unexpected class: " + name);
}
byte[] class_bytes = ClassUnloadCommon.getClassData(name);
return defineClass(name, class_bytes, 0, class_bytes.length);
}
} // MyClassLoader
}
static class LoadLibraryClass {
static {
System.loadLibrary("LoadLibraryClass");
nTest();
}
native static void nTest();
}
public static void main(String... args) throws Exception {
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
"-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions",
"-XX:+WhiteBoxAPI", "-Xmn8m", "-Xlog:library=info",
"-Djava.library.path=" + System.getProperty("java.library.path"),
"-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
"LoadLibraryTest$LoadLibrary", System.getProperty("test.classes"));
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(0);
output.shouldContain("Loaded library");
output.shouldContain("Found Java_LoadLibraryTest_00024LoadLibraryClass_nTest__ in library");
if (output.getOutput().contains("Class LoadLibraryClass was unloaded")) {
output.shouldContain("Unloaded library with handle");
} else {
throw new SkippedException(
"Skipping check for library unloading logging because no unloading occurred");
}
}
}
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