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gh-117300: Use stop the world to make sys._current_frames and sys._current_exceptions thread-safe. (#117301)

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This adds a stop the world pause to make the two functions thread-safe
when the GIL is disabled in the free-threaded build.

Additionally, the main test thread may call `sys._current_exceptions()` as
soon as `g_raised.set()` is called. The background thread may not yet reach
the `leave_g.wait()` line.
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Sam Gross 2024-03-29 15:33:06 -04:00 • committed by GitHub
parent 94c97423a9
commit 01bd74eadb
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2 changed files with 6 additions and 1 deletions
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Lib/test/test_sys.py
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@ -562,7 +562,8 @@ class SysModuleTest(unittest.TestCase):
# And the next record must be for g456().
filename, lineno, funcname, sourceline = stack[i+1]
self.assertEqual(funcname, "g456")
self.assertTrue(sourceline.startswith("if leave_g.wait("))
self.assertTrue((sourceline.startswith("if leave_g.wait(") or
sourceline.startswith("g_raised.set()")))
finally:
# Reap the spawned thread.
leave_g.set()