Add test_perfmaps.py from 3.14.3 (#7551)

ShaharNaveh · web-flow · commit 5afa3493a1a9 · 2026-04-03T00:50:25.000+09:00
diff --git a/Lib/test/test_perfmaps.py b/Lib/test/test_perfmaps.py
@@ -0,0 +1,23 @@
+import os
+import sys
+import unittest
+
+try:
+    from _testinternalcapi import perf_map_state_teardown, write_perf_map_entry
+except ImportError:
+    raise unittest.SkipTest("requires _testinternalcapi")
+
+
+if sys.platform != 'linux':
+    raise unittest.SkipTest('Linux only')
+
+
+class TestPerfMapWriting(unittest.TestCase):
+    def test_write_perf_map_entry(self):
+        self.assertEqual(write_perf_map_entry(0x1234, 5678, "entry1"), 0)
+        self.assertEqual(write_perf_map_entry(0x2345, 6789, "entry2"), 0)
+        with open(f"/tmp/perf-{os.getpid()}.map") as f:
+            perf_file_contents = f.read()
+            self.assertIn("1234 162e entry1", perf_file_contents)
+            self.assertIn("2345 1a85 entry2", perf_file_contents)
+        perf_map_state_teardown()
