[llvm-branch-commits] [asan] Print standalone partial granules in poison_history_size (PR #195670)

[Vitaly Buka via llvm-branch-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/195670

Currently, `poison_history_size` only reports the poisoning stack trace
if the shadow value is exactly `kAsanUserPoisonedMemoryMagic`.

Unlike heap or stack poisoning, where red-zones
guaranteed, user poisoning more likely end-up with
single standalong granule. Printing history could be helpful.