[foreign-preview] RFR: 8280527: Move jdk.incubator.foreign to java.lang.foreign

[Julia Boes]

On Tue, 25 Jan 2022 12:59:33 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> To prepare for preview, this change removes the jdk.incubator.foreign module and moves the public classes to java.base/java.lang.foreign, implementation classes to java.base/jdk.internal.foreign respectively. 
>> 
>> While here, `SystemLookup` is replaced with the method `ClassLoader::findNative` and the methods in `MemoryHandles` are moved to `MethodHandles`. The `@PreviewFeature(feature=PreviewFeature.Feature.FOREIGN)` annotation and the `--enable-preview` flag are added were needed.
>
> src/java.base/share/classes/jdk/internal/foreign/AbstractMemorySegmentImpl.java line 366:
> 
>> 364: 
>> 365:     void checkValidState() {
>> 366:         try {
> 
> Why the exception wrapping?

That's wrong, `checkValidStateSlow()` is already throwing the right exception type. Fixed.

-------------

PR: https://git.openjdk.java.net/panama-foreign/pull/633