[Lldb-commits] [PATCH] D14163: Address another race condition running tests on Windows

Adrian McCarthy via lldb-commits lldb-commits at lists.llvm.org
Wed Oct 28 15:57:27 PDT 2015

amccarth added inline comments.

Comment at: packages/Python/lldbsuite/test/lldbtest.py:1823-1830
@@ -1822,3 +1822,10 @@
-                    os.rename(src, dst)
+                    try:
+                        os.rename(src, dst)
+                    except:
+                        # We've seen consistent rename failures on Windows, perhaps because the
+                        # just-created log file is being scanned by anti-virus.  Empirically, this
+                        # sleep-and-retry approach allows tests to succeed much more reliably.
+                        time.sleep(0.5)
+                        os.rename(src, dst)
zturner wrote:
> I have a patch pending to create an `lldbsuite.support` package.  I wonder if it would be worth sinking this "rename with retry" (and similar for delete-with-retry) into this library.  Then you could call this as:
>     lldbsuite.support.filesystem.rename_with_retry(src, dst, 1)  # Retry up to 1 time
> I only mention this because this is now the second time we've had to do this (other time right below), so perhaps we might need this again in the future too.
> I don't feel too strongly, so up to you.  If you think it's a good idea though, you'll probably need to wait until my CL goes in first so that you can add this method to the package (which doesn't exist yet)
I'm happy to wait.  I just glad I found the root cause.


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