test/hotspot/jtreg/runtime/modules/AccessCheckOpen.java

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/*
 * @test
 * @modules java.base/jdk.internal.misc
 * @library /test/lib ..
 * @compile p2/c2.java
 * @compile p1/c1.java
 * @build jdk.test.whitebox.WhiteBox
 * @compile/module=java.base java/lang/ModuleHelper.java
 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI AccessCheckOpen
 */

import java.lang.Module;
import static jdk.test.lib.Asserts.*;

public class AccessCheckOpen {

    // Test that if module1 can read module2 and module2 is open, then
    // p1.c1 can read p2.c2
    public static void main(String args[]) throws Throwable {
        Object m1, m2;

        // Get the java.lang.Module object for module java.base
        Class jlObject = Class.forName("java.lang.Object");
        Object jlObject_jlM = jlObject.getModule();
        assertNotNull(jlObject_jlM, "jlModule object of java.lang.Object should not be null");

        // Get the class loader for AccessCheckOpen, which is also used to
        // load classes p1.c1 and p2.c2
        ClassLoader this_cldr = AccessCheckOpen.class.getClassLoader();

        // Define a module for p1
        m1 = ModuleHelper.ModuleObject("module1", this_cldr, new String[] { "p1" });
        assertNotNull(m1, "Module should not be null");
        ModuleHelper.DefineModule(m1, false, "9.0", "m1/here", new String[] { "p1" });
        ModuleHelper.AddReadsModule(m1, jlObject_jlM);

        // Define a module for p2
        m2 = ModuleHelper.ModuleObject("module2", this_cldr, new String[] { "p2" });
        assertNotNull(m2, "Module should not be null");
        ModuleHelper.DefineModule(m2, true, "9.0", "m2/there", new String[] { "p2" });
        ModuleHelper.AddReadsModule(m2, jlObject_jlM);

        // Make package p1 in m1 visible to everyone so this test can run it
        ModuleHelper.AddModuleExportsToAll(m1, "p1");

        // Let m1 read m2
        ModuleHelper.AddReadsModule(m1, m2);

        // p1.c1's ctor calls a method in p2.c2, and m2 is open.
        // So should not get IllegalAccessError
        Class p1_c1_class = Class.forName("p1.c1");
        p1_c1_class.newInstance();
    }
}