Prefer confined over shared Arena.

Author: Chessray

src/main/java21/com/evolvedbinary/jnibench/jmhbench/cache/MemorySegmentCache.java

@@ -56,7 +56,8 @@ public class GetJNIBenchmarkJava25 extends GetJNIBenchmark {
                                                                                           ValueLayout.JAVA_INT,
                                                                                           ValueLayout.ADDRESS,
                                                                                           ValueLayout.ADDRESS,
-                                                                                          ValueLayout.JAVA_INT)))
+                                                                                          ValueLayout.JAVA_INT),
+                                                                                      Linker.Option.critical(false)))
                                                  .orElseThrow();
 
   }

src/main/java25/com/evolvedbinary/jnibench/jmhbench/GetJNIBenchmarkJava25.java

@@ -56,7 +56,8 @@ public class PutJNIBenchmarkJava25 extends PutJNIBenchmark {
                                                                                           ValueLayout.JAVA_INT,
                                                                                           ValueLayout.ADDRESS,
                                                                                           ValueLayout.ADDRESS,
-                                                                                          ValueLayout.JAVA_INT)))
+                                                                                          ValueLayout.JAVA_INT),
+                                                                                      Linker.Option.critical(false)))
                                                  .orElseThrow();
 
   }

src/main/java25/com/evolvedbinary/jnibench/jmhbench/PutJNIBenchmarkJava25.java

@@ -37,7 +37,7 @@ public class MemorySegmentCache extends LinkedListAllocationCache<MemorySegment>
   private final Arena arena;
 
   public MemorySegmentCache() {
-    arena = Arena.ofShared();
+    arena = Arena.ofConfined();
   }