test/jdk/com/sun/jdi/RedefineChangeClassOrder.java

/*
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 * 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.
 *
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 * questions.
 */

/*
 * @test
 * @bug 6270982
 * @summary Redefine a class so that the order of external classes in
 *          the constant pool are changed.
 * @comment converted from test/jdk/com/sun/jdi/RedefineChangeClassOrder.sh
 *
 * @library /test/lib
 * @compile -g RedefineChangeClassOrder.java
 * @run main/othervm RedefineChangeClassOrder
 */

import jdk.test.lib.process.OutputAnalyzer;
import lib.jdb.JdbCommand;
import lib.jdb.JdbTest;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

class RedefineChangeClassOrderTarg {
    public static void main(String[] args) {
        new RedefineChangeClassOrderTarg().hi(false);
        new RedefineChangeClassOrderTarg().hi(true);  // @1 breakpoint
    }

    public void hi(boolean expected) {
        boolean isNewVersion = false; // @1 commentout
        // @1 uncomment boolean isNewVersion = true;

        if (expected == isNewVersion) {
            System.out.println("PASS: expected and isNewVersion match.");
        } else {
            System.out.println("FAIL: expected and isNewVersion do not match.");
            System.out.println("expected=" + expected
              + "  isNewVersion=" + isNewVersion);
        }

        Foo1 foo1 = new Foo1();  // @1 commentout
        foo1.hi();  // @1 commentout

        // This Hack code block exists to force some verification_type_info
        // objects of subtype Object_variable_info into the StackMapTable.
        //
        // In the redefined code, the above Foo1 code is effectively
        // moved after the Foo2 code below which causes things to be
        // layed out in a different order in the constant pool. The
        // cpool_index in the Object_variable_info has to be updated
        // in the redefined code's StackMapTable to refer to right
        /// constant pool index in the merged constant pool.
        Hack hack = getClass().getAnnotation(Hack.class);
        if (hack != null) {
            String class_annotation = hack.value();
            System.out.println("class annotation is: " + class_annotation);
            if (isNewVersion) {
                if (class_annotation.equals("JUNK")) {
                    System.out.println("class_annotation is JUNK.");
                } else {
                    System.out.println("class_annotation is NOT JUNK.");
                }
            }
        }

        Foo2 foo2 = new Foo2();
        foo2.hi();

        // @1 uncomment Foo1 foo1 = new Foo1();
        // @1 uncomment foo1.hi();
    }
}

class Foo1 {
    public void hi() {
        System.out.println("Hello from " + getClass());
    }
}

class Foo2 {
    public void hi() {
        System.out.println("Hello from " + getClass());
    }
}

@Retention(RetentionPolicy.RUNTIME)
@interface Hack {
    String value();
}


public class RedefineChangeClassOrder extends JdbTest {

    public static void main(String argv[]) {
        new RedefineChangeClassOrder().run();
    }

    private RedefineChangeClassOrder() {
        super(DEBUGGEE_CLASS, SOURCE_FILE);
    }

    private static final String DEBUGGEE_CLASS = RedefineChangeClassOrderTarg.class.getName();
    private static final String SOURCE_FILE = "RedefineChangeClassOrder.java";

    @Override
    protected void runCases() {
        setBreakpoints(1);
        jdb.command(JdbCommand.run());
        redefineClass(1, "-g");
        jdb.contToExit(1);

        new OutputAnalyzer(getDebuggeeOutput())
                .shouldNotContain("FAIL:");
    }
}