[3.14] gh-134986: Catch PermissionError when trying to call perf in tests (GH-134987) (#135841)

miss-islington · emmatyping · web-flow · commit 85fbf80ca214 · 2025-06-23T10:53:55.000Z
gh-134986: Catch PermissionError when trying to call perf in tests (GH-134987) Using Ubuntu 24.04 on the Windows Subsystem for Linux, perf will raise a `PermissionError` instead of `FileNotFoundError`. This commit modifies the tests to catch that. (cherry picked from commit 6ab842f) Co-authored-by: Emma Smith <emma@emmatyping.dev>
diff --git a/Lib/test/test_perf_profiler.py b/Lib/test/test_perf_profiler.py
@@ -506,9 +506,12 @@ def _is_perf_version_at_least(major, minor):
     # The output of perf --version looks like "perf version 6.7-3" but
     # it can also be perf version "perf version 5.15.143", or even include
     # a commit hash in the version string, like "6.12.9.g242e6068fd5c"
+    #
+    # PermissionError is raised if perf does not exist on the Windows Subsystem
+    # for Linux, see #134987
     try:
         output = subprocess.check_output(["perf", "--version"], text=True)
-    except (subprocess.CalledProcessError, FileNotFoundError):
+    except (subprocess.CalledProcessError, FileNotFoundError, PermissionError):
         return False
     version = output.split()[2]
     version = version.split("-")[0]
