[all-commits] [llvm/llvm-project] 2a612a: [Memprof] Changes `HISTOGRAM_GRANULARITY` from 8U ...

[Matthew Weingarten via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2a612a1b343dcc0d3dd44df4866f6c6af5cc090f
      https://github.com/llvm/llvm-project/commit/2a612a1b343dcc0d3dd44df4866f6c6af5cc090f
  Author: Matthew Weingarten <matt at weingarten.org>
  Date:   2024-07-29 (Mon, 29 Jul 2024)

  Changed paths:
    M compiler-rt/lib/memprof/memprof_mapping.h

  Log Message:
  -----------
  [Memprof] Changes `HISTOGRAM_GRANULARITY` from 8U to 8ULL. (#100949)

This changes a bug in memprofiling with histogram where the shadow mask
would be `0xFFFFFFF8` instead of `0xFFFFFFFFFFFFFFF8`, essentially
discarding the upper 32 bits of the address. This can cause different
addresses to be mapped to the same shadow address.



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