[all-commits] [llvm/llvm-project] 0930f6: [ELF] -r: fix crash when SHF_LINK_ORDER linked-to ...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0930f62cf600d9e2e9a45fef1b3a422d50be89d5
      https://github.com/llvm/llvm-project/commit/0930f62cf600d9e2e9a45fef1b3a422d50be89d5
  Author: Fangrui Song <i at maskray.me>
  Date:   2024-01-08 (Mon, 08 Jan 2024)

  Changed paths:
    M lld/ELF/LinkerScript.cpp
    A lld/test/ELF/linkorder-group.test

  Log Message:
  -----------
  [ELF] -r: fix crash when SHF_LINK_ORDER linked-to section has a larger index

Fixes: b8dface221f4490933b0d39deb769e97ca134e5f

ThinLTO asan build may place `asan_globals` before the associated `.bss.xxx` section.
`rel->getOutputSection()` is nullptr because `rel->parent` hasn't been
set, leading to a crash. Simplify return `s->name` in this case.