RFR: 8347408: Create an internal method handle adapter for system calls with errno [v7]

[Per Minborg]

> Going forward, converting older JDK code to use the relatively new FFM API requires system calls that can provide `errno` and the likes to explicitly allocate a `MemorySegment` to capture potential error states. This can lead to negative performance implications if not designed carefully and also introduces unnecessary code complexity.
> 
> Hence, this PR proposes to add a JDK internal method handle adapter that can be used to handle system calls with `errno`, `GetLastError`, and `WSAGetLastError`.
> 
> It relies on an efficient carrier-thread-local cache of memory regions to allide allocations.
> 
> Here are some benchmarks that ran on a platform thread and virtual threads respectively:
> 
> 
> Benchmark                                                  Mode  Cnt   Score   Error  Units
> CaptureStateUtilBench.OfVirtual.adaptedSysCallFail         avgt   30  24.193 ? 0.268  ns/op
> CaptureStateUtilBench.OfVirtual.adaptedSysCallSuccess      avgt   30   8.268 ? 0.080  ns/op
> CaptureStateUtilBench.OfVirtual.explicitAllocationFail     avgt   30  42.076 ? 1.003  ns/op
> CaptureStateUtilBench.OfVirtual.explicitAllocationSuccess  avgt   30  21.801 ? 0.138  ns/op
> CaptureStateUtilBench.OfVirtual.tlAllocationFail           avgt   30  23.265 ? 0.087  ns/op
> CaptureStateUtilBench.OfVirtual.tlAllocationSuccess        avgt   30   8.285 ? 0.155  ns/op
> 
> CaptureStateUtilBench.adaptedSysCallFail                   avgt   30  23.033 ? 0.423  ns/op
> CaptureStateUtilBench.adaptedSysCallSuccess                avgt   30   3.676 ? 0.104  ns/op  // <- Happy path using an internal pool
> 
> CaptureStateUtilBench.explicitAllocationFail               avgt   30  42.023 ? 0.736  ns/op
> CaptureStateUtilBench.explicitAllocationSuccess            avgt   30  22.013 ? 0.648  ns/op  // <- Allocating memory upon each invocation
> 
> CaptureStateUtilBench.tlAllocationFail                     avgt   30  22.050 ? 0.233  ns/op
> CaptureStateUtilBench.tlAllocationSuccess                  avgt   30   3.756 ? 0.056  ns/op  // <- Using the pool explicitly from Java code
> 
> 
> Adapted system call:
> 
> 
>         return (int) ADAPTED_HANDLE.invoke(0, 0); // Uses a MH-internal pool
> 
> 
> Explicit allocation:
> 
> 
>         try (var arena = Arena.ofConfined()) {
>             return (int) HANDLE.invoke(arena.allocate(4), 0, 0);
>         }
> 
> 
> Thread Local allocation:
> 
> 
>         try (var arena = POOLS.take()) {
>             return (int) HANDLE.invoke(arena.allocate(4), 0, 0); // Uses a manually specified pool
>         }
> 
> 
> The adapted system call exhibits a ~6x performanc...

Per Minborg has updated the pull request incrementally with one additional commit since the last revision:

  Add holding a reference to the original arena in the taken arena

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/23517/files
  - new: https://git.openjdk.org/jdk/pull/23517/files/8b9b5087..a3af69e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23517&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23517&range=05-06

  Stats: 41 lines in 1 file changed: 20 ins; 13 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/23517.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23517/head:pull/23517

PR: https://git.openjdk.org/jdk/pull/23517