[all-commits] [llvm/llvm-project] 9f3ff8: [scudo] Separated committed and decommitted entrie...

[Joshua Baehring via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9f3ff8d28a97379521ceb8cb29fbba5c3b487fec
      https://github.com/llvm/llvm-project/commit/9f3ff8d28a97379521ceb8cb29fbba5c3b487fec
  Author: Joshua Baehring <98630690+JoshuaMBa at users.noreply.github.com>
  Date:   2024-08-09 (Fri, 09 Aug 2024)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/secondary.h

  Log Message:
  -----------
  [scudo] Separated committed and decommitted entries. (#101409)

Initially, the LRU list stored all mapped entries with no distinction
between the committed (non-madvise()'d) entries and decommitted
(madvise()'d) entries. Now these two types of entries re separated into
two lists, allowing future cache logic to branch depending on whether or
not entries are committed or decommitted. Furthermore, the retrieval
algorithm will prioritize committed entries over decommitted entries.
Specifically, committed entries that satisfy the MaxUnusedCachePages
requirement are retrieved before optimal-fit, decommitted entries.

This commit addresses the compiler errors raised
[here](https://github.com/llvm/llvm-project/pull/100818#issuecomment-2261043261).



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