[3.14] gh-141612: improve `test_trampoline_works_with_forks` coverage (GH-141613...

gh-141612: improve `test_trampoline_works_with_forks` coverage (GH-141613)
(cherry picked from commit f15f6d0ba3715c67643e58959459b0e84a67b183)

Co-authored-by: Paresh Joshi <rahulj9223@gmail.com>

diff --git a/Lib/test/test_perf_profiler.py b/Lib/test/test_perf_profiler.py
index 9f2e5899334df4ef529583fa369f6f785698725c..1e1b0522787ff3ff24ae90b22bd5d02ea5e8a597 100644 (file)
--- a/Lib/test/test_perf_profiler.py
+++ b/Lib/test/test_perf_profiler.py
@@ -160,6 +160,16 @@ class TestPerfTrampoline(unittest.TestCase):
         self.assertIn(f"py::bar_fork:{script}", child_perf_file_contents)
         self.assertIn(f"py::baz_fork:{script}", child_perf_file_contents)
 
+        # The parent's map should not contain the child's symbols.
+        self.assertNotIn(f"py::foo_fork:{script}", perf_file_contents)
+        self.assertNotIn(f"py::bar_fork:{script}", perf_file_contents)
+        self.assertNotIn(f"py::baz_fork:{script}", perf_file_contents)
+
+        # The child's map should not contain the parent's symbols.
+        self.assertNotIn(f"py::foo:{script}", child_perf_file_contents)
+        self.assertNotIn(f"py::bar:{script}", child_perf_file_contents)
+        self.assertNotIn(f"py::baz:{script}", child_perf_file_contents)
+
     @unittest.skipIf(support.check_bolt_optimized(), "fails on BOLT instrumented binaries")
     def test_sys_api(self):
         code = """if 1: