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Resmoke sets the "take core dump" flag for the hang analyzer when `ASAN_OPTIONS` is not set to avoid taking core dumps on asan because of shadow memory. https://github.com/10gen/mongo/blob/2a0652d07064e8078d089f9e3924e2f4a0feb158/buildscripts/resmokelib/sighandler.py#L160 However, we share our sanatizer options between asan, aubsan, and ubsan so this is always set for our ubsan variants currently https://github.com/mongodb/mongo/blob/6888a1472e002d9e1fe741a670261b28e45b2ab7/etc/evergreen.yml#L2084 We also check for `ASAN_OPTIONS` here https://github.com/mongodb/mongo/blob/2a0652d07064e8078d089f9e3924e2f4a0feb158/buildscripts/resmokelib/testing/hooks/cleanup.py#L23-L24 which restarts the test fixture more often which isn't needed on UBSan because we don't be doing leak detection without ASan Original slack thread: https://mongodb.slack.com/archives/C0V79S1PY/p1692207555012019

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xgen-internal-githook commented on Tue, 22 Aug 2023 17:19:07 +0000: Author: {'name': 'Trevor Guidry', 'email': 'trevor.guidry@mongodb.com', 'username': ''} Message: SERVER-80153 set ubsan options individually Branch: v7.0 https://github.com/mongodb/mongo/commit/1ad521b9ad10cbb3f08b22692b27382b3ab4b660 xgen-internal-githook commented on Mon, 21 Aug 2023 22:04:16 +0000: Author: {'name': 'Trevor Guidry', 'email': 'trevor.guidry@mongodb.com', 'username': ''} Message: SERVER-80153 set ubsan options individually Branch: master https://github.com/mongodb/mongo/commit/b8f2f954dd79b3734f789fb971c03d156658311d

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