RFR: 8356648: runtime/Thread/AsyncExceptionTest.java fails with +StressCompiledExceptionHandlers [v2]

[Dean Long]

> The test fails (or times out) because Runtime1::counter_overflow offers a safepoint, allowing async exceptions, but there is no exception handler for the out-of-line slow path call to Runtime1::counter_overflow.  Rather than add an exception handler, the simple fix is to replace JRT_BLOCK with JRT_BLOCK_NO_ASYNC so that counter_overflow doesn't need to deal with async exceptions.  The GC poll point for backwards branches is sufficient to allow async exceptions.
> I also improved the test so that it fails more quickly rather than waiting forever and eventually timing out, and added a C1-specific run using -XX:+StressCompiledExceptionHandlers.

Dean Long has updated the pull request incrementally with one additional commit since the last revision:

  add -XX:+IgnoreUnrecognizedVMOptions

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25375/files
  - new: https://git.openjdk.org/jdk/pull/25375/files/52ff78a5..f7c14901

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25375&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25375&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25375.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25375/head:pull/25375

PR: https://git.openjdk.org/jdk/pull/25375