test/jdk/java/security/ProtectionDomain/PreserveCombinerTest.java

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import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.DomainCombiner;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;
import jdk.internal.misc.SharedSecrets;

/*
 * @test
 * @bug 8064331
 * @summary Make sure that JavaSecurityAccess.doIntersectionPrivilege()
 *          is not dropping the information about the domain combiner of
 *          the stack ACC
 * @modules java.base/jdk.internal.misc
 */

public class PreserveCombinerTest {
    public static void main(String[]args) throws Exception {
        final DomainCombiner dc = new DomainCombiner() {
            @Override
            public ProtectionDomain[] combine(ProtectionDomain[] currentDomains, ProtectionDomain[] assignedDomains) {
                return currentDomains; // basically a no-op
            }
        };

        // Get an instance of the saved ACC
        AccessControlContext saved = AccessController.getContext();
        // Simulate the stack ACC with a DomainCombiner attached
        AccessControlContext stack = new AccessControlContext(AccessController.getContext(), dc);

        // Now try to run JavaSecurityAccess.doIntersectionPrivilege() and assert
        // whether the DomainCombiner from the stack ACC is preserved
        boolean ret = SharedSecrets.getJavaSecurityAccess().doIntersectionPrivilege(new PrivilegedAction<Boolean>() {
            @Override
            public Boolean run() {
                return dc == AccessController.getContext().getDomainCombiner();
            }
        }, stack, saved);

        if (!ret) {
            System.exit(1);
        }
    }
}