RFR: 8292559: Add test for -XX:+CheckJNICalls showing changed signal handlers

[Thomas Stuefe]

On Thu, 18 Aug 2022 12:48:30 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

> Please review this small change to add a test that option -XX:+CheckJNICalls shows changed signal handlers.  This new test is a copy of the recently deleted TestPosixSig.java with small changes.  This version of the test only checks that handlers were changed for SIGFPE and SIGILL signals.
> 
> The test was tested using Mach5 to run it on Linux, Mac OS, and Windows.
> 
> Thanks, Harold

LGTM. Thanks for this test.

test/hotspot/jtreg/runtime/posixSig/libTestPsig.c line 38:

> 36: 
> 37:     printf( " HANDLER (1) " );
> 38: }

Nit: handler could be file scope static, and does not need extern "C"

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Marked as reviewed by stuefe (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9919