llvm-project/llvm/test/tools/yaml2obj/empty-symbols.yaml

# Ensure yaml2obj doesn't error on empty optional mappings, such as Symbols
# RUN: yaml2obj %s -o %t

!ELF
FileHeader:
  Class:           ELFCLASS64
  Data:            ELFDATA2LSB
  Type:            ET_DYN
  Machine:         EM_X86_64
Symbols:
Allow empty mappings for optional YAML input Summary: This change fixes a bug where `obj2yaml` can in some cases produce YAML that causes `yaml2obj` to error. The ELF YAML document structure has a `Sections` mapping, which contains three mappings, all of which are optional: `Local`, `Global`, and `Weak.` Any one of these can be missing, but if all three are missing, then `yaml2obj` errors. This change allows YAML input for cases like this one. I have tested this with check-llvm and check-lld, and all tests passed. This change is the result of test failures while working on D39582, which introduces a `DynamicSymbols` mapping, which will be empty at times. Reviewers: compnerd, jakehehrlich, silvas, kledzik, mehdi_amini, pcc Reviewed By: compnerd Subscribers: silvas, llvm-commits Differential Revision: https://reviews.llvm.org/D39908 llvm-svn: 318428 2017-11-17 01:46:11 +08:00			`# Ensure yaml2obj doesn't error on empty optional mappings, such as Symbols`
			`# RUN: yaml2obj %s -o %t`

			`!ELF`
			`FileHeader:`
			`Class: ELFCLASS64`
			`Data: ELFDATA2LSB`
			`Type: ET_DYN`
			`Machine: EM_X86_64`
			`Symbols:`