[llvm-dev] [RFC] Generating LLD reproducers on crashes

[Alexandre Ganea via llvm-dev]

The build system needs to be aware of the core dump files, and deal with them before/after the build. It should do an automatic cleanup before and compress+upload the core dumps to a network location if a crash occurs. I agree that the size is a problem if that isn't dealt with. 50 GB .dmp files for LLD crashes aren't uncommon, and you would probably see the same figures with production builds on Linux. Mostly likely dumps would need to be enabled explicitly with an env.var or a system setting on the build system? I personally find it valuable to have .dmp files. As hard as we try to make the CI builds the same as the local ones, there's always something different that triggers a different behavior on the build system.

-----Message d'origine-----
De : Fangrui Song <maskray at google.com> 
Envoyé : April 21, 2021 12:56 PM
À : Alexandre Ganea <alexandre.ganea at ubisoft.com>
Cc : David Blaikie <dblaikie at gmail.com>; Petr Hosek <phosek at chromium.org>; Haowei Wu <haowei at google.com>; llvm-dev at lists.llvm.org
Objet : Re: [llvm-dev] [RFC] Generating LLD reproducers on crashes

For 3: on Linux, there are many system effects which can suppress crash dumps...
I am still abit concerned with the size of the core file..
If users find this particular useful and want to go down this route, it is fine to me.