Hi,
Please review this patch for JVM and Core-libs support for the JEP 360
Sealed Classes preview feature. Code changes include the following:
* Processing of the new PermittedSubclasses attribute to enforce that
a class or interface, whose super is a sealed class or interface,
must be listed in the super's PermittedSubclasses attribute.
* Disallow redefinition of a sealed class or interface if its
redefinition would change its PermittedSubclasses attribute.
* Support API's to determine if a class or interface is sealed and, if
it's sealed, return a list of its permitted subclasses.
* asm support for the PermittedSubclasses attribute
Open Webrev:
http://cr.openjdk.java.net/~vromero/8225056/webrev.00/index.html
JBS bug: https://bugs.openjdk.java.net/browse/JDK-8225056
Java Language Spec changes:
http://cr.openjdk.java.net/~gbierman/jep360/jep360-20200513/specs/sealed-classes-jls.html
JVM Spec changes:
http://cr.openjdk.java.net/~gbierman/jep360/jep360-20200513/specs/sealed-classes-jvms.html
JEP 360: https://bugs.openjdk.java.net/browse/JDK-8227043
JVM CSR: https://bugs.openjdk.java.net/browse/JDK-8242578
Changes to javac and other language tools will be reviewed separately.
Thanks, Harold
