[all-commits] [llvm/llvm-project] a84800: [lldb] Fixed UB in CPlusPlusLanguage plug-in (#158...

[Dmitry Vasilyev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a848008e1996f8934dee0a297975ac0e6b4200ec
      https://github.com/llvm/llvm-project/commit/a848008e1996f8934dee0a297975ac0e6b4200ec
  Author: Dmitry Vasilyev <dvassiliev at accesssoftek.com>
  Date:   2025-09-12 (Fri, 12 Sep 2025)

  Changed paths:
    M lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
    M lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp

  Log Message:
  -----------
  [lldb] Fixed UB in CPlusPlusLanguage plug-in (#158304)

C++11 allows the use of Universal Character Names (UCNs) in identifiers,
including function names.

According to the spec the behavior of std::isalpha(ch) and
std::isalnum(ch) is undefined if the argument's value is neither
representable as unsigned char nor equal to EOF. To use these functions
safely with plain chars (or signed chars), the argument should first be
converted to unsigned char.



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