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/*
* Copyright (c) 2021, 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
* @compile lookup/Lookup.java
* @compile invoker/Invoker.java
* @run main/othervm --enable-native-access=ALL-UNNAMED TestLoaderLookup
*/
import java.lang.foreign.*;
import java.lang.reflect.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Paths;
public class TestLoaderLookup {
public static void main(String[] args) throws ReflectiveOperationException {
ClassLoader loader1 = newClassLoader("lookup");
Class<?> lookup = loader1.loadClass("lookup.Lookup");
Method fooSymbol = lookup.getDeclaredMethod("fooSymbol");
MemorySegment foo = (MemorySegment) fooSymbol.invoke(null);
ClassLoader loader2 = newClassLoader("invoker");
Class<?> invoker = loader2.loadClass("invoker.Invoker");
Method invoke = invoker.getDeclaredMethod("invoke", MemorySegment.class);
invoke.invoke(null, foo);
loader1 = null;
lookup = null;
fooSymbol = null;
// Make sure that the loader is kept reachable
for (int i = 0 ; i < 1000 ; i++) {
invoke.invoke(null, foo); // might crash if loader1 is GC'ed
System.gc();
}
}
public static ClassLoader newClassLoader(String path) {
try {
return new URLClassLoader(new URL[] {
Paths.get(System.getProperty("test.classes", path)).toUri().toURL(),
}, null);
} catch (MalformedURLException e){
throw new RuntimeException("Unexpected URL conversion failure", e);
}
}
}
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