use os.kill(pid, 0) for all the posix OS

Signed-off-by: Keming <kemingy94@gmail.com>

Author: kemingy

Lib/profiling/sampling/sample.py

@@ -272,7 +272,7 @@ def _print_unwinder_stats(self):
 def _is_process_running(pid):
     if pid <= 0:
         return False
-    if sys.platform == "linux" or sys.platform == "darwin":
+    if os.name == "posix":
         try:
             os.kill(pid, 0)
             return True