RFR: JDK-8281003 - MethodHandles::lookup throws NPE if caller is null

[Mandy Chung]

On Mon, 14 Feb 2022 18:28:09 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> JDK-8281003 - MethodHandles::lookup throws NPE if caller is null
>
> src/java.base/share/classes/java/lang/invoke/MethodHandles.java line 121:
> 
>> 119:         Class<?> c = Reflection.getCallerClass();
>> 120:         if (c == null) {
>> 121:             throw new IllegalCallerException();
> 
> Suggestion:
> 
>             throw new IllegalCallerException("no caller frame");

The javadoc needs to be updated to specify this `IllegalCallerException` be thrown.


    * @throws IllegalCallerException if there is no caller frame on the stack when called
    * directly from a JNI attached thread

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PR: https://git.openjdk.java.net/jdk/pull/7447