92eb334c91
Fixed an issue in class unloading to delay walk until class loader's aliveness is determined of modularity lists to remove dead modules Reviewed-by: coleenp, dholmes, sspitsyn, zgu
130 lines
4.9 KiB
Java
130 lines
4.9 KiB
Java
/*
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* Copyright (c) 2016, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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import static jdk.test.lib.Asserts.*;
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import java.lang.reflect.Layer;
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import java.lang.module.Configuration;
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import java.lang.module.ModuleDescriptor;
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import java.lang.module.ModuleFinder;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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//
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// ClassLoader1 --> defines m1 --> packages p1
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// ClassLoader2 --> defines m2 --> packages p2
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// Java System Class Loader --> defines m3 --> packages p3
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//
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// m1 can read m2
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// package p2 in m2 is exported to m1 and m3
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//
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// class p1.c1 defined in m1 tries to access p2.c2 defined in m2
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// Access allowed since m1 can read m2 and package p2 is exported to m1.
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//
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public class ModuleNonBuiltinCLMain {
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// Create a Layer over the boot layer.
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// Define modules within this layer to test access between
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// publically defined classes within packages of those modules.
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public void createLayerOnBoot() throws Throwable {
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// Define module: m1
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// Can read: java.base, m2
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// Packages: p1
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// Packages exported: p1 is exported to unqualifiedly
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ModuleDescriptor descriptor_m1 =
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new ModuleDescriptor.Builder("m1")
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.requires("java.base")
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.requires("m2")
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.exports("p1")
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.build();
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// Define module: m2
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// Can read: java.base, m3
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// Packages: p2
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// Packages exported: package p2 is exported to m1 and m3
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Set<String> targets = new HashSet<>();
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targets.add("m1");
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targets.add("m3");
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ModuleDescriptor descriptor_m2 =
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new ModuleDescriptor.Builder("m2")
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.requires("java.base")
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.requires("m3")
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.exports("p2", targets)
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.build();
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// Define module: m3
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// Can read: java.base
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// Packages: p3
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// Packages exported: none
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ModuleDescriptor descriptor_m3 =
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new ModuleDescriptor.Builder("m3")
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.requires("java.base")
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.build();
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// Set up a ModuleFinder containing all modules for this layer.
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ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2, descriptor_m3);
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// Resolves "m1"
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Configuration cf = Layer.boot()
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.configuration()
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.resolveRequires(finder, ModuleFinder.of(), Set.of("m1"));
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// map each module to differing user defined class loaders for this test
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Map<String, ClassLoader> map = new HashMap<>();
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Loader1 cl1 = new Loader1();
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Loader2 cl2 = new Loader2();
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ClassLoader cl3 = ClassLoader.getSystemClassLoader();
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map.put("m1", cl1);
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map.put("m2", cl2);
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map.put("m3", cl3);
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// Create Layer that contains m1 & m2
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Layer layer = Layer.boot().defineModules(cf, map::get);
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assertTrue(layer.findLoader("m1") == cl1);
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assertTrue(layer.findLoader("m2") == cl2);
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assertTrue(layer.findLoader("m3") == cl3);
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assertTrue(layer.findLoader("java.base") == null);
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// now use the same loader to load class p1.c1
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Class p1_c1_class = cl1.loadClass("p1.c1");
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try {
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p1_c1_class.newInstance();
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} catch (IllegalAccessError e) {
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throw new RuntimeException("Test Failed, an IAE should not be thrown since p2 is exported qualifiedly to m1");
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}
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}
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public static void main(String args[]) throws Throwable {
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ModuleNonBuiltinCLMain test = new ModuleNonBuiltinCLMain();
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test.createLayerOnBoot();
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}
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static class Loader1 extends ClassLoader { }
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static class Loader2 extends ClassLoader { }
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}
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