[compiler-rt] [compiler-rt][rtsan] pathconf/fpathconf interception. (PR #134495)

[David CARLIER via llvm-commits]

devnexen wrote:

depends on the query. Ideally, most of them ought to be called at initialisation time. For non deterministic queries, e.g. _PC_NAME_MAX, mount points and metadata, it might not be safe to call can be flagged in rtsan context. wdyt ?

https://github.com/llvm/llvm-project/pull/134495