[all-commits] [llvm/llvm-project] 260483: Add support for __builtin_verbose_trap (#79230)

[Akira Hatanaka via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2604830aacdd563715da030d0396b565e912436f
      https://github.com/llvm/llvm-project/commit/2604830aacdd563715da030d0396b565e912436f
  Author: Akira Hatanaka <ahatanak at gmail.com>
  Date:   2024-06-25 (Tue, 25 Jun 2024)

  Changed paths:
    M clang/docs/LanguageExtensions.rst
    M clang/include/clang/AST/Expr.h
    M clang/include/clang/Basic/Builtins.td
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/CodeGen/ModuleBuilder.h
    M clang/lib/AST/ExprConstant.cpp
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/CodeGen/CGDebugInfo.cpp
    M clang/lib/CodeGen/CGDebugInfo.h
    M clang/lib/Sema/SemaChecking.cpp
    A clang/test/CodeGenCXX/debug-info-verbose-trap.cpp
    A clang/test/SemaCXX/verbose-trap.cpp

  Log Message:
  -----------
  Add support for __builtin_verbose_trap (#79230)

The builtin causes the program to stop its execution abnormally and
shows a human-readable description of the reason for the termination
when a debugger is attached or in a symbolicated crash log.

The motivation for the builtin is explained in the following RFC:

https://discourse.llvm.org/t/rfc-adding-builtin-verbose-trap-string-literal/75845

clang's CodeGen lowers the builtin to `llvm.trap` and emits debugging
information that represents an artificial inline frame whose name
encodes the category and reason strings passed to the builtin.



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