libreoffice builds timing out: 6 hour gap between end of afl++ build and start of hongguzz build

[caolanm]

It's been a long time since there was a successful libreoffice build: https://oss-fuzz-build-logs.storage.googleapis.com/index.html#libreoffice

With most efforts ending in a TIMEOUT. I added some logging in our build (from which I'm now guessing that there is a 12 hour limit for the full set of builds)

Taking two recent sets of logs the actual build of libreoffice itself in each configuration seems to be about under 2 hours. But there is an approx 6 hour gap between the completion of build configuration 1 (afl++) and start of build configuration 2 (honggfuzz), but only an approx 35 minute gap between the completion of build configuration 2 and start of build configuration 3.

Could it be possibly spending most of that 6 hours in check_build ? Timestamps on steps would be helpful to figure that out I guess. I'm inclined towards the idea that the 6 hours is consumed by the check_build on the afl++ build results and to drop it from project.yaml

2021-08-15

Step #4: Copying precompiled afl++
Step #4: start at Sun Aug 15 09:51:05 UTC 2021
Step #4: end at Sun Aug 15 11:38:36 UTC 2021

Step #13: Skipping compilation; using precompiled honggfuzz
Step #13: start at Sun Aug 15 17:54:38 UTC 2021
Step #13: end at Sun Aug 15 19:00:51 UTC 2021

Step #22: Compiling libFuzzer to /usr/lib/libFuzzingEngine.a... done.
Step #22: start at Sun Aug 15 19:37:26 UTC 2021
Step #22: end at Sun Aug 15 20:47:34 UTC 2021

2021-08-13

Step #4: Copying precompiled afl++
Step #4: start at Fri Aug 13 09:34:47 UTC 2021
Step #4: end at Fri Aug 13 11:21:08 UTC 2021

Step #13: Skipping compilation; using precompiled honggfuzz
Step #13: start at Fri Aug 13 18:05:28 UTC 2021
Step #13: end at Fri Aug 13 19:09:56 UTC 2021

Step #22: Compiling libFuzzer to /usr/lib/libFuzzingEngine.a... done.
Step #22: start at Fri Aug 13 19:45:31 UTC 2021
Step #22: end at Fri Aug 13 20:53:28 UTC 2021

[caolanm]

I'll close this as we just disabled the afl fuzzer to workaround it and used the extra time freed up to build msan versions instead