Igor Ignatyev a7aba2b61c 8263549: 8263412 can cause jtreg testlibrary split
Reviewed-by: iklam, dcubed
2021-03-13 14:51:53 +00:00

78 lines
3.1 KiB
Java

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import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Path;
import java.nio.file.Paths;
/*
* @test
* @bug 8231924 8233091 8233272
* @summary Confirm load (but not link) behavior of Class.forName()
* @library /test/lib
*
* @compile MissingClass.java Container.java
*
* @run driver jdk.test.lib.helpers.ClassFileInstaller -jar classes.jar Container Container$1
*
* @run main/othervm NonLinking init
* @run main/othervm NonLinking load
*/
/*
* The @compile and '@main ClassFileInstaller' tasks above create a classes.jar
* file containing the .class file for Container, but not MissingClass.
*/
public class NonLinking {
public static void main(String[] args) throws Throwable {
Path jarPath = Paths.get("classes.jar");
URL url = jarPath.toUri().toURL();
URLClassLoader ucl1 = new URLClassLoader("UCL1",
new URL[] { url },
null); // Don't delegate
switch(args[0]) {
case "init":
try {
// Trying to initialize Container without MissingClass -> NCDFE
Class.forName("Container", true, ucl1);
throw new RuntimeException("Missed expected NoClassDefFoundError");
} catch (NoClassDefFoundError expected) {
final String CLASSNAME = "MissingClass";
Throwable cause = expected.getCause();
if (!cause.getMessage().contains(CLASSNAME)) {
throw new RuntimeException("Cause of NoClassDefFoundError does not contain \"" + CLASSNAME + "\"", cause);
}
}
break;
case "load":
// Loading (but not linking) Container will succeed.
// Before 8233091, this fails with NCDFE due to linking.
Class.forName("Container", false, ucl1);
break;
default:
throw new RuntimeException("Unknown command: " + args[0]);
}
}
}