[OpenJDK 2D-Dev] RFR: 8269223: -Xcheck:jni WARNINGs working with fonts on Linux [v2]

[Sergey Bylokhov]

On Wed, 30 Jun 2021 10:42:44 GMT, Maxim Kartashev <github.com+28651297+mkartashev at openjdk.org> wrote:

>> Added an `ExceptionCheck()` followed by `ExceptionDescribe()` and `ExceptionClear()` immediately after the Java calls made from the callback function `ReadTTFontFileFunc()` in `freetypeScaler.c`. 
>> 
>> The exception(s) need to be cleared because we're not returning immediately to Java that would've been able to handle them gracefully. And in order not to loose the exception entirely (even though the return value would also indicate an error condition), print out the exception with `ExceptionDescribe()` to aid in debugging.
>
> Maxim Kartashev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addressed PR comments
>   
>   1. Allowed test to run on any platform.
>   2. Trimmed comments to fit in with 80 columns.
>   3. Removed unnecessayr comments.
>   4. Made the ExceptionDescribe() calls conditional on the value of
>      FontUtilities.debugFonts()

Looks fine to me, I'll run the tests.

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PR: https://git.openjdk.java.net/jdk/pull/4572