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/*
Copyright (c) 2017, 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 8174954
* @summary Test that invokedynamic instructions, that initially throw IAE exceptions
* because of a missing module read edge, behave correctly when executed
* after the module read edge is added.
* @compile ModuleLibrary.java
* p2/c2.java
* p5/c5.jasm
* p7/c7.jasm
* @run main/othervm MethodAccessReadTwice
*/
import java.lang.module.Configuration;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleFinder;
import java.lang.ModuleLayer;
import java.lang.Module;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
// defines first_mod --> packages p5
// defines second_mod --> package p2, p2 is exported to first_mod
// defines third_mod --> packages p7
public class MethodAccessReadTwice {
// Create a Layer over the boot layer.
// Define modules within this layer to test access between
// publicly defined classes within packages of those modules.
public void createLayerOnBoot() throws Throwable {
// Define module: first_mod
// Can read: java.base
// Packages: p5
// Packages exported: p5 is exported unqualifiedly
ModuleDescriptor descriptor_first_mod =
ModuleDescriptor.newModule("first_mod")
.requires("java.base")
.exports("p5")
.build();
// Define module: second_mod
// Can read: java.base
// Packages: p2
// Packages exported: p2 is exported to first_mod
ModuleDescriptor descriptor_second_mod =
ModuleDescriptor.newModule("second_mod")
.requires("java.base")
.exports("p2")
.build();
// Define module: third_mod
// Can read: java.base
// Packages: p7
// Packages exported: p7 is exported unqualifiedly
ModuleDescriptor descriptor_third_mod =
ModuleDescriptor.newModule("third_mod")
.requires("java.base")
.exports("p7")
.build();
// Set up a ModuleFinder containing all modules for this layer
ModuleFinder finder = ModuleLibrary.of(descriptor_first_mod,
descriptor_second_mod,
descriptor_third_mod);
// Resolves "first_mod", "second_mod", and "third_mod"
Configuration cf = ModuleLayer.boot()
.configuration()
.resolve(finder, ModuleFinder.of(),
Set.of("first_mod", "second_mod", "third_mod"));
// Map each module to this class loader
Map<String, ClassLoader> map = new HashMap<>();
ClassLoader loader = MethodAccessReadTwice.class.getClassLoader();
map.put("first_mod", loader);
map.put("second_mod", loader);
map.put("third_mod", loader);
// Create Layer that contains first_mod, second_mod, and third_mod
ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
Class p2_c2_class = loader.loadClass("p2.c2");
Class p5_c5_class = loader.loadClass("p5.c5");
Class p7_c7_class = loader.loadClass("p7.c7");
Module first_mod = p5_c5_class.getModule();
Module second_mod = p2_c2_class.getModule();
Module third_mod = p7_c7_class.getModule();
p5.c5 c5_obj = new p5.c5();
p2.c2 c2_obj = new p2.c2();
p7.c7 c7_obj = new p7.c7();
// Test that if an invokedynamic instruction gets an IAE exception because
// of a module read issue, and then the read issue is fixed, that
// re-executing the same invokedynamic instruction will get the same IAE.
// First access check for p5.c5 --> call to method5 --> tries to access p2.c2
try {
// Should throw IAE because p5.c5's module cannot read p2.c2's module.
c5_obj.method5(c2_obj);
throw new RuntimeException("Test Failed, module first_mod should not have access to p2.c2");
} catch (IllegalAccessError e) {
String message = e.getMessage();
if (!(message.contains("cannot access") &&
message.contains("because module first_mod does not read module second_mod"))) {
throw new RuntimeException("Wrong message: " + message);
} else {
System.out.println("Test Succeeded at attempt #1");
}
}
// Add a read edge from p5/c5's module (first_mod) to p2.c2's module (second_mod)
c5_obj.methodAddReadEdge(p2_c2_class.getModule());
// Second access check for p5.c5, should have same result as first
try {
c5_obj.method5(c2_obj); // should result in IAE
throw new RuntimeException("Test Failed, access should have been cached above");
} catch (IllegalAccessError e) {
String message = e.getMessage();
if (!(message.contains("cannot access") &&
message.contains("because module first_mod does not read module second_mod"))) {
throw new RuntimeException("Wrong message: " + message);
} else {
System.out.println("Test Succeeded at attempt #2");
}
}
// Test that if one invokedynamic instruction gets an IAE exception
// because of a module read issue, and then the read issue is fixed, that
// a subsequent invokedynamic instruction, that tries the same access,
// succeeds.
c7_obj.method7(c2_obj, second_mod); // Should not result in IAE
}
public static void main(String args[]) throws Throwable {
MethodAccessReadTwice test = new MethodAccessReadTwice();
test.createLayerOnBoot();
}
}
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