[all-commits] [llvm/llvm-project] dccc00: [ELF] Add context-aware diagnostic functions

[Fangrui Song via All-commits]

  Branch: refs/heads/users/MaskRay/spr/elf-add-context-aware-diagnostic-functions
  Home:   https://github.com/llvm/llvm-project
  Commit: dccc00a07ba591e0d5b937b0231f30f760003a7c
      https://github.com/llvm/llvm-project/commit/dccc00a07ba591e0d5b937b0231f30f760003a7c
  Author: Fangrui Song <i at maskray.me>
  Date:   2024-10-21 (Mon, 21 Oct 2024)

  Changed paths:
    M lld/Common/ErrorHandler.cpp
    M lld/ELF/Config.h
    M lld/ELF/Driver.cpp
    M lld/ELF/InputFiles.cpp
    M lld/ELF/InputFiles.h
    M lld/ELF/Target.cpp
    M lld/ELF/Target.h
    M lld/include/lld/Common/ErrorHandler.h

  Log Message:
  -----------
  [ELF] Add context-aware diagnostic functions

The current diagnostic functions log/warn/error/fatal lack a context
argument and call the global `lld::errorHandler()`, which prevents
multiple lld instances in one process.

This patch introduces context-aware replacements:

* log => Log(ctx)
* warn => Warn(ctx)
* errorOrWarn => Err(ctx)
* error => ErrAlways(ctx)
* fatal => Fatal(ctx)

Example: `errorOrWarn(toString(f) + "xxx")` => `Err(ctx) << f << "xxx"`.
(`toString(f)` is shortened to `f` as a bonus and may access `ctx`
without accessing the global variable (see `Target.cpp`)).

`ctx.e = &context->e;` can be replaced with a non-global Errorhandler
when `ctx` becomes a local variable.

(For the ELF port, the long term goal is to eliminate `error`. Most can
be straightforwardly converted to `Err(ctx)`.)

Pull Request: https://github.com/llvm/llvm-project/pull/112319



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