Re: Adding CI to our tree

Hi,

On 2021-10-02 11:05:20 -0400, Tom Lane wrote:
> Yeah. I cannot see any reason to object to Andres' 0002 patch: you can
> just ignore those files if you don't want to use cirrus. It does set a
> precedent that we'd also accept infrastructure for other CI systems,
> but as long as they're similarly noninvasive, why not?

Exactly.

> (Maybe there needs to be one more directory level though, ie
> ci/cirrus/whatever. I don't want to end up with one toplevel directory per
> CI platform.)

Good question - it definitely shouldn't be one toplevel directory per CI
platform (although some will require their own hidden toplevel directories,
like .github/workflows etc). I'd hope to share a bunch of the infrastructure
between them over time, so perhaps we don't need a deeper hierarchy.

> I don't know enough about Windows to evaluate 0001, but I'm a little
> worried about it because it looks like it's changing our *production*
> error handling on that platform.

Yea. It's clearly not ready as-is - it's the piece that I was planning to
write a separate email about.

It's hard to understand what *precisely* SEM_NOGPFAULTERRORBOX etc do.

What I do know is that without the _set_abort_behavior() stuff abort() doesn't
trigger windows' "crash" paths in at least debugging builds, and that the
SetErrorMode() and _CrtSetReportMode() changes are necessary to get segfaults
to reach the crash paths.

The in-tree behaviour turns out to make debugging on windows a major pain, at
least when compiling with msvc. Crashes never trigger core dumps or "just in
time" debugging (their term for invoking a debugger upon crash), so one has to
attach to processes before they crash, to have any chance of debugging.

As far as I can tell this also means that at least for debugging builds,
pgwin32_install_crashdump_handler() is pretty much dead weight -
crashDumpHandler() never gets invoked. I think it may get invoked for abort()s
in production builds, but probably not for segfaults.

And despite SEM_NOGPFAULTERRORBOX we display those annoying "popup" boxes
telling us about the crash and giving the option to retry, ignore, something
something. It's all a bit baffling.

> As for 0003, wasn't that committed already?

Not at the time I was writing the email, but now it is, yes.

Greetings,

Andres Freund