Backport fixes to python/cpython#107888 (#1865)

* Backport pythongh-109928: Fix test_mmap.test_access_parameter() on macOS 14

* Backport pythongh-110125: Fix test_mmap PROT_EXEC comment

* Add backport comment

---------

Co-authored-by: slozier <[email protected]>

Author: BCSharp

Src/StdLib/Lib/test/test_mmap.py

@@ -242,10 +242,16 @@ def test_access_parameter(self):
             # Try writing with PROT_EXEC and without PROT_WRITE
             prot = mmap.PROT_READ | getattr(mmap, 'PROT_EXEC', 0)
             with open(TESTFN, "r+b") as f:
-                m = mmap.mmap(f.fileno(), mapsize, prot=prot)
-                self.assertRaises(TypeError, m.write, b"abcdef")
-                self.assertRaises(TypeError, m.write_byte, 0)
-                m.close()
+                # try/except backported from Python 3.12
+                try:
+                    m = mmap.mmap(f.fileno(), mapsize, prot=prot)
+                except PermissionError:
+                    # on macOS 14, PROT_READ | PROT_EXEC is not allowed
+                    pass
+                else:
+                    self.assertRaises(TypeError, m.write, b"abcdef")
+                    self.assertRaises(TypeError, m.write_byte, 0)
+                    m.close()
 
     def test_bad_file_desc(self):
         # Try opening a bad file descriptor...