[PATCH] D52777: [LLD] - Do not crash when reporting errors when .debug_line_str (DWARF5) is used.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.
grimar added a reviewer: ruiu.
Herald added subscribers: JDevlieghere, arichardson, aprantl, emaste.
Herald added a reviewer: espindola.

Imagine we have the following code:

  int foo();
  int main() { return foo(); }

It will crash if you try to compile it with`clang -O0 -gdwarf-5 test.cpp -o test -g -fuse-ld=lld`

The crash happens inside the LLVM DWARF parser because LLD does not provide the `.debug_line_str` section.
At the same time for correct parsing and reporting, we anyways need to provide this section from our side.
The patch fixes the issue.


https://reviews.llvm.org/D52777

Files:
  ELF/DWARF.cpp
  ELF/DWARF.h
  test/ELF/debug-line-str.s

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