[all-commits] [llvm/llvm-project] 973242: [sancov] add -sanitizer-coverage-drop-ctors (#137980)

[Alexander Potapenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9732427f377ec076601d4d6ede697f39a4409ee4
      https://github.com/llvm/llvm-project/commit/9732427f377ec076601d4d6ede697f39a4409ee4
  Author: Alexander Potapenko <glider at google.com>
  Date:   2025-05-07 (Wed, 07 May 2025)

  Changed paths:
    M llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
    M llvm/test/Instrumentation/SanitizerCoverage/trace-pc-guard.ll

  Log Message:
  -----------
  [sancov] add -sanitizer-coverage-drop-ctors (#137980)

[sancov] add -sanitizer-coverage-drop-ctors
Add a hidden flag to omit the @sancov.module_ctor* constructors.

When building kernel modules with sanitizer coverage enabled,
constructors may reference global symbols, creating unsupported
relocations. Because the kernel does not strictly need these
constructors in order for coverage to work, allow the user to omit
them.

Also apply clang-format to SanitizerCoverage.cpp.

Fixes PR132393.



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