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

[Chris Plummer]

On Fri, 4 Aug 2023 09:59:41 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> There is coding e.g. in
> https://github.com/openjdk/jdk/blob/master/test/jdk/jdk/jfr/event/runtime/TestNativeLibrariesEvent.java#L72
> that deals with shared lib naming on different OS.
> This code should be simplified.

Changes requested by cjplummer (Reviewer).

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.

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PR Review: https://git.openjdk.org/jdk/pull/15151#pullrequestreview-1563375724
PR Review Comment: https://git.openjdk.org/jdk/pull/15151#discussion_r1284731606