test/hotspot/jtreg/compiler/aot/fingerprint/SuperChanged.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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 */

/*
 * @test
 * @summary AOT methods should be swept if a super class has changed.
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @requires vm.aot
 * @build compiler.aot.fingerprint.SuperChanged
 *        compiler.aot.AotCompiler
 *
 * @run main
 *      compiler.aot.fingerprint.SuperChanged WRITE-UNMODIFIED-CLASS
 * @run driver compiler.aot.AotCompiler -libname libSuperChanged.so
 *      -class compiler.aot.fingerprint.Foo
 *
 * @run main
 *      compiler.aot.fingerprint.SuperChanged TEST-UNMODIFIED
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseAOT -XX:+PrintAOT
 *      -XX:AOTLibrary=./libSuperChanged.so
 *      -Xlog:aot+class+fingerprint=trace -Xlog:aot+class+load=trace
 *      compiler.aot.fingerprint.SuperChanged TEST-UNMODIFIED
  *
 * @run main
 *      compiler.aot.fingerprint.SuperChanged WRITE-MODIFIED-CLASS
 * @run main
 *      compiler.aot.fingerprint.SuperChanged TEST-MODIFIED
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseAOT -XX:+PrintAOT
 *      -XX:AOTLibrary=./libSuperChanged.so
 *      -Xlog:aot+class+fingerprint=trace -Xlog:aot+class+load=trace
 *      compiler.aot.fingerprint.SuperChanged TEST-MODIFIED
 */

package compiler.aot.fingerprint;

import jdk.test.lib.Asserts;
import jdk.test.lib.compiler.InMemoryJavaCompiler;

import java.io.*;

class Bar {
    volatile int x = 0;
    volatile int y = 1;
}

class Foo extends Bar {

    volatile int z;
    int getX() {
        for (z = 0; z < 10000; z++) {
            if (z % 7 == 1) {
                z += 2;
            }
        }
        return x;
    }
}

public class SuperChanged {
    public static void main(String args[]) throws Throwable {
        Foo f = new Foo();
        System.out.println("f.getX = " + f.getX());
        switch (args[0]) {
        case "WRITE-UNMODIFIED-CLASS":
            compileClass(false);
            break;
        case "WRITE-MODIFIED-CLASS":
            compileClass(true);
            break;
        case "TEST-UNMODIFIED":
            Asserts.assertTrue(f.getX() == 0, "getX from unmodified Foo class should return 0");
            break;
        case "TEST-MODIFIED":
            Asserts.assertTrue(f.getX() == 1, "getX from modified Foo class should return 1");
            break;
        default:
            throw new RuntimeException("unexpected option: " + args[0]);
        }
    }

    static void compileClass(boolean isModified) throws Throwable {
        String class_src_0 = "package compiler.aot.fingerprint; class Bar {volatile int x = 0;  volatile int y = 1;}";
        String class_src_1 = "package compiler.aot.fingerprint; class Bar {volatile int y = 0;  volatile int x = 1;}";
        String src = (isModified) ? class_src_1 : class_src_0;

        String filename = System.getProperty("test.classes") + "/compiler/aot/fingerprint/Bar.class";
        FileOutputStream fos = new FileOutputStream(filename);
        fos.write(InMemoryJavaCompiler.compile("compiler.aot.fingerprint.Bar", src));
        fos.close();
    }
}