[all-commits] [llvm/llvm-project] 76fac9: [sanitizer] Parse weighted sanitizer args and -fsa...

[Thurston Dang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 76fac9c01736b1254e42427f8e0910c0f1d01fba
      https://github.com/llvm/llvm-project/commit/76fac9c01736b1254e42427f8e0910c0f1d01fba
  Author: Thurston Dang <thurston at google.com>
  Date:   2025-01-09 (Thu, 09 Jan 2025)

  Changed paths:
    M clang/include/clang/Basic/CodeGenOptions.h
    M clang/include/clang/Basic/Sanitizers.h
    M clang/include/clang/Driver/Options.td
    M clang/include/clang/Driver/SanitizerArgs.h
    M clang/lib/Basic/Sanitizers.cpp
    M clang/lib/Driver/SanitizerArgs.cpp
    M clang/lib/Frontend/CompilerInvocation.cpp
    M clang/test/Driver/fsanitize.c

  Log Message:
  -----------
  [sanitizer] Parse weighted sanitizer args and -fsanitize-skip-hot-cutoff (#121619)

This adds a function to parse weighted sanitizer flags (e.g.,
`-fsanitize-blah=undefined=0.5,null=0.3`) and adds the plumbing to apply
that to a new flag, `-fsanitize-skip-hot-cutoff`.

`-fsanitize-skip-hot-cutoff` currently has no effect; future work will
use it to generalize ubsan-guard-checks (originally introduced in
5f9ed2ff8364ff3e4fac410472f421299dafa793).

---------

Co-authored-by: Vitaly Buka <vitalybuka at google.com>



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