RFR: JDK-8313670: Simplify shared lib name handling code in some tests

[David Holmes]

On Fri, 4 Aug 2023 20:55:25 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> test/lib/jdk/test/lib/Platform.java line 376:
>> 
>>> 374:         }
>>> 375:     }
>>> 376: 
>> 
>> The following tests could leverage this new API. Just look for calls to `Platform.sharedLibraryExt()`:
>> 
>> test/hotspot/jtreg/runtime/signal/SigTestDriver.java
>> test/hotspot/jtreg/vmTestbase/nsk/jvmti/NativeLibraryCopier.java
>> test/jdk/com/sun/tools/attach/warnings/DynamicLoadWarningTest.java
>> 
>> Perhaps a `Platform.buildSharedLibraryName()` API is worth considering.
>
> The fix looks good in general.
> But I like the suggestion from Chris above

Agreed, I'd like to see `Platform.buildSharedLibraryName()` in addition to the other methods (the latter are needed if you want to decompose a filename to get the library name (though we could also provide a function just to do that).

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PR Review Comment: https://git.openjdk.org/jdk/pull/15151#discussion_r1285438334