Fix permission error in macOS

Author: pablogsal

Lib/test/test_profiling/test_sampling_profiler/test_children.py

@@ -19,6 +19,10 @@
     _cleanup_process,
 )
 
+# String to check for in stderr when profiler lacks permissions (e.g., macOS)
+_PERMISSION_ERROR_MSG = "Permission Error"
+_SKIP_PERMISSION_MSG = "Insufficient permissions for remote profiling"
+
 
 def _readline_with_timeout(file_obj, timeout):
     # Thread-based readline with timeout - works across all platforms
@@ -580,9 +584,12 @@ def test_is_python_process_python_subprocess(self):
             while time.time() < deadline:
                 if proc.poll() is not None:
                     self.fail(f"Process {proc.pid} exited unexpectedly")
-                if is_python_process(proc.pid):
-                    detected = True
-                    break
+                try:
+                    if is_python_process(proc.pid):
+                        detected = True
+                        break
+                except PermissionError:
+                    self.skipTest(_SKIP_PERMISSION_MSG)
                 time.sleep(0.05)
 
             self.assertTrue(
@@ -947,6 +954,9 @@ def test_subprocesses_flag_spawns_child_and_creates_output(self):
                 timeout=SHORT_TIMEOUT,
             )
 
+            if _PERMISSION_ERROR_MSG in result.stderr:
+                self.skipTest(_SKIP_PERMISSION_MSG)
+
             # Check that parent output file was created
             self.assertTrue(
                 os.path.exists(output_file),
@@ -1010,6 +1020,9 @@ def test_subprocesses_flag_with_flamegraph_output(self):
                 timeout=SHORT_TIMEOUT,
             )
 
+            if _PERMISSION_ERROR_MSG in result.stderr:
+                self.skipTest(_SKIP_PERMISSION_MSG)
+
             self.assertTrue(
                 os.path.exists(output_file),
                 f"Flamegraph output not created. stderr: {result.stderr}",
@@ -1063,6 +1076,9 @@ def test_subprocesses_flag_no_crash_on_quick_child(self):
                 timeout=SHORT_TIMEOUT,
             )
 
+            if _PERMISSION_ERROR_MSG in result.stderr:
+                self.skipTest(_SKIP_PERMISSION_MSG)
+
             # Should not crash - exit code 0
             self.assertEqual(
                 result.returncode,