RMIClassLoader/spi/ContextInsulation.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
 * @bug 4450891
 * @summary verify that the java.util.ServiceLoader-based location of an
 * RMIClassLoader provider does not require any permissions of the
 * (arbitrary) protection domains that happens to be on the stack
 * when RMIClassLoader is first used.
 * @author Peter Jones
 *
 * @library ../../../testlibrary
 * @build TestLibrary ServiceConfiguration TestProvider TestProvider2
 * @run main/othervm/policy=security.policy ContextInsulation
 */

import java.security.AccessControlContext;
import java.security.CodeSource;
import java.security.Permissions;
import java.security.ProtectionDomain;
import java.security.cert.Certificate;

public class ContextInsulation {
    public static void main(String[] args) throws Exception {

        /*
         * If we delay setting the security manager until after the service
         * configuration file has been installed, then this test still
         * functions properly, but the -Djava.security.debug output is
         * lacking, so to ease debugging, we'll set it early-- at the cost
         * of having to specify the policy even when running standalone.
         */
        TestLibrary.suggestSecurityManager(null);

        ServiceConfiguration.installServiceConfigurationFile();

        /*
         * Execute use of RMIClassLoader within an AccessControlContext
         * that has a protection domain with no permissions, to make sure
         * that RMIClassLoader can still properly initialize itself.
         */
        CodeSource codesource = new CodeSource(null, (Certificate[]) null);
        Permissions perms = null;
        ProtectionDomain pd = new ProtectionDomain(codesource, perms);
        AccessControlContext acc =
            new AccessControlContext(new ProtectionDomain[] { pd });

        java.security.AccessController.doPrivileged(
        new java.security.PrivilegedExceptionAction() {
            public Object run() throws Exception {
                TestProvider.exerciseTestProvider(
                    TestProvider2.loadClassReturn,
                    TestProvider2.loadProxyClassReturn,
                    TestProvider2.getClassLoaderReturn,
                    TestProvider2.getClassAnnotationReturn,
                    TestProvider2.invocations);
                return null;
            }
        }, acc);
    }
}