author | thartmann |
Mon, 05 Feb 2018 07:20:26 +0100 | |
changeset 48863 | ca551fa1c8cd |
parent 48302 | 50181ff45d46 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 8164512 8191360 |
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* @requires vm.compMode != "Xcomp" |
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* @summary verify if the native library is unloaded when the class loader is GC'ed |
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* @build p.Test |
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* @run main/othervm/native -Xcheck:jni NativeLibraryTest |
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*/ |
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import java.io.IOException; |
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import java.net.URLClassLoader; |
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import java.nio.file.Files; |
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import java.nio.file.Path; |
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import java.nio.file.Paths; |
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public class NativeLibraryTest { |
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static final Path CLASSES = Paths.get("classes"); |
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static int unloadedCount = 0; |
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/* |
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* Called by JNI_OnUnload when the native library is unloaded |
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*/ |
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static void nativeLibraryUnloaded() { |
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unloadedCount++; |
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} |
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public static void main(String... args) throws Exception { |
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setup(); |
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for (int count=1; count <= 5; count++) { |
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// create a class loader and load a native library |
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runTest(); |
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// unloading the class loader and native library |
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System.gc(); |
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// give Cleaner thread a chance to unload the native library |
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Thread.sleep(100); |
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// unloadedCount is incremented when the native library is unloaded |
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if (count != unloadedCount) { |
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throw new RuntimeException("Expected unloaded=" + count + |
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" but got=" + unloadedCount); |
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} |
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} |
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} |
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/* |
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* Loads p.Test class with a new class loader and its static initializer |
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* will load a native library. |
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* |
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* The class loader becomes unreachable when this method returns and |
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* the native library should be unloaded at some point after the class |
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* loader is garbage collected. |
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*/ |
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static void runTest() throws Exception { |
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// invoke p.Test.run() that loads the native library |
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Runnable r = newTestRunnable(); |
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r.run(); |
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// reload the native library by the same class loader |
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r.run(); |
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// load the native library by another class loader |
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Runnable r1 = newTestRunnable(); |
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try { |
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r1.run(); |
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throw new RuntimeException("should fail to load the native library" + |
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" by another class loader"); |
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} catch (UnsatisfiedLinkError e) {} |
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} |
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/* |
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* Loads p.Test class with a new class loader and returns |
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* a Runnable instance. |
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*/ |
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static Runnable newTestRunnable() throws Exception { |
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TestLoader loader = new TestLoader(); |
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Class<?> c = Class.forName("p.Test", true, loader); |
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return (Runnable) c.newInstance(); |
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} |
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static class TestLoader extends URLClassLoader { |
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static URL[] toURLs() { |
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try { |
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return new URL[] { CLASSES.toUri().toURL() }; |
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} catch (MalformedURLException e) { |
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throw new Error(e); |
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} |
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} |
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TestLoader() { |
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super("testloader", toURLs(), ClassLoader.getSystemClassLoader()); |
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} |
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} |
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/* |
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* move p/Test.class out from classpath to the scratch directory |
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*/ |
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static void setup() throws IOException { |
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String dir = System.getProperty("test.classes", "."); |
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Path file = Paths.get("p", "Test.class"); |
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Files.createDirectories(CLASSES.resolve("p")); |
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Files.move(Paths.get(dir).resolve(file), |
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CLASSES.resolve("p").resolve("Test.class")); |
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8164512: Replace ClassLoader use of finalizer with phantom reference to unload native library
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} |
67aa34b019e1
8164512: Replace ClassLoader use of finalizer with phantom reference to unload native library
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changeset
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} |