[PATCH] D70135: [profile] Factor out logic for mmap'ing merged profile, NFC

[Vedant Kumar via Phabricator via llvm-commits]

vsk created this revision.
vsk added reviewers: phosek, davidxl.
Herald added a project: LLVM.

Split out the logic to get the size of a merged profile and to do a
compatibility check. This can be shared with both the continuous+merging
mode implementation, as well as the runtime-allocated counters
implementation planned for Fuchsia.

Lifted out of D69586 <https://reviews.llvm.org/D69586>.


https://reviews.llvm.org/D70135

Files:
  compiler-rt/lib/profile/InstrProfilingFile.c

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