RFR: 8266036: class file for sun.misc.Contended not found

[Jan Lahoda]

On Thu, 10 Jun 2021 15:28:16 GMT, Vicente Romero <vromero at openjdk.org> wrote:

>> The ct.sym may contain classfiles referring to annotations that are not present in ct.sym (liek JDK's internal annotation `sun.misc.Contended`). If javac will try to load them (while discovering annotations for the purpose of detecting which annotation processors should be run), an error will be produced (please see the issue). The proposal is to strip annotations that are not present in ct.sym when generating ct.sym.
>
> make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java line 311:
> 
>> 309:     private static final String PREVIEW_FEATURE_ANNOTATION_INTERNAL =
>> 310:             "Ljdk/internal/PreviewFeature+Annotation;";
>> 311:     public static final Set<String> HARDCODED_ANNOTATIONS = new HashSet<>(
> 
> shouldn't PREVIEW_FEATURE_ANNOTATION_INTERNAL be added to HARDCODED_ANNOTATIONS too?

The *_INTERNAL annotation(s) only exists in ct.sym and are injected after the annotations are filtered, so I think it does not need to be in `HARDCODED_ANNOTATION`.

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PR: https://git.openjdk.java.net/jdk/pull/4428