gh-132912: Use readline to synchronize between procs in remote pdb test#132949
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pablogsal
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Apr 25, 2025
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LGTM but please check with this for a while to ensure we don't have surprises:
$ ./python -m test test_remote_pdb -v --forever -j10 --timeout=60
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I see no issues with a few hundred iterations. |
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I think we can use stdout to do the synchronization. It's much simpler and we don't need to rely on
time.sleep()which will surprise you all the time.This PR also get rid of the socket that is used to do synchronization. There's a downside to that - socket has a timeout which means if our
cdid not work properly, it will hang forever. However, we are already risking the hanging because we have_read_until_prompt- that has areadline()in it and if something goes way out of control it will hang. I don't think the extra protection gave us much - because it's not a test forcontinue. If we need to consider the possibility that everything could go wrong, a lot of the existing tests need to be rewritten.I also changed the sleep value because that makes the test take 1s+ on a perfect computer and that's a bit too much. 0.2s is more in the range of the time it already needs to spawn the process and everything.