[all-commits] [llvm/llvm-project] f6ba35: [libc] Add nullptr check option to printf %s

[michaelrj-google via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f6ba352988b2734cbbd21df98e5e5536d3cad98f
      https://github.com/llvm/llvm-project/commit/f6ba352988b2734cbbd21df98e5e5536d3cad98f
  Author: Michael Jones <michaelrj at google.com>
  Date:   2023-08-07 (Mon, 07 Aug 2023)

  Changed paths:
    M libc/src/stdio/printf_core/printf_config.h
    M libc/src/stdio/printf_core/string_converter.h
    M libc/src/stdio/printf_core/write_int_converter.h
    M libc/test/src/stdio/sprintf_test.cpp

  Log Message:
  -----------
  [libc] Add nullptr check option to printf %s

Some printf implementations perform a null check on pointers passed to
%s. While that's not in the standard, this patch adds it as an option
for compatibility. It also puts a similar check in %n behind the same
flag.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D156923