1 files changed, 53 insertions, 0 deletions
diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index ec003d8..a94eb6c 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -4455,6 +4455,59 @@ class _TestSharedMemory(BaseTestCase):
                     "resource_tracker: There appear to be 1 leaked "
                     "shared_memory objects to clean up at shutdown", err)
 
+    @unittest.skipIf(os.name != "posix", "resource_tracker is posix only")
+    def test_shared_memory_untracking(self):
+        # gh-82300: When a separate Python process accesses shared memory
+        # with track=False, it must not cause the memory to be deleted
+        # when terminating.
+        cmd = '''if 1:
+            import sys
+            from multiprocessing.shared_memory import SharedMemory
+            mem = SharedMemory(create=False, name=sys.argv[1], track=False)
+            mem.close()
+        '''
+        mem = shared_memory.SharedMemory(create=True, size=10)
+        # The resource tracker shares pipes with the subprocess, and so
+        # err existing means that the tracker process has terminated now.
+        try:
+            rc, out, err = script_helper.assert_python_ok("-c", cmd, mem.name)
+            self.assertNotIn(b"resource_tracker", err)
+            self.assertEqual(rc, 0)
+            mem2 = shared_memory.SharedMemory(create=False, name=mem.name)
+            mem2.close()
+        finally:
+            try:
+                mem.unlink()
+            except OSError:
+                pass
+            mem.close()
+
+    @unittest.skipIf(os.name != "posix", "resource_tracker is posix only")
+    def test_shared_memory_tracking(self):
+        # gh-82300: When a separate Python process accesses shared memory
+        # with track=True, it must cause the memory to be deleted when
+        # terminating.
+        cmd = '''if 1:
+            import sys
+            from multiprocessing.shared_memory import SharedMemory
+            mem = SharedMemory(create=False, name=sys.argv[1], track=True)
+            mem.close()
+        '''
+        mem = shared_memory.SharedMemory(create=True, size=10)
+        try:
+            rc, out, err = script_helper.assert_python_ok("-c", cmd, mem.name)
+            self.assertEqual(rc, 0)
+            self.assertIn(
+                b"resource_tracker: There appear to be 1 leaked "
+                b"shared_memory objects to clean up at shutdown", err)
+        finally:
+            try:
+                mem.unlink()
+            except OSError:
+                pass
+            resource_tracker.unregister(mem._name, "shared_memory")
+            mem.close()
+
 #
 # Test to verify that `Finalize` works.
 #