[all-commits] [llvm/llvm-project] 258c9b: [clang][analyzer] Handle special value AT_FDCWD in...

[Balázs Kéri via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 258c9bebbdfa793493b71db555f5deb5ade499b4
      https://github.com/llvm/llvm-project/commit/258c9bebbdfa793493b71db555f5deb5ade499b4
  Author: Balázs Kéri <1.int32 at gmail.com>
  Date:   2023-05-16 (Tue, 16 May 2023)

  Changed paths:
    M clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
    M clang/test/Analysis/std-c-library-functions-arg-constraints.c

  Log Message:
  -----------
  [clang][analyzer] Handle special value AT_FDCWD in affected standard functions

Some file and directory related functions have an integer file descriptor argument
that can be a valid file descriptor or a special value AT_FDCWD. This value is
relatively often used in open source projects and is usually defined as a negative
number, and the checker reports false warnings (a valid file descriptor is not
negative) if this fix is not included.

Reviewed By: steakhal

Differential Revision: https://reviews.llvm.org/D149160