llvm-project/lld/test/mach-o/empty-sections.yaml

# RUN: ld64.lld -arch x86_64 -r %s -o %t
#
# Test that writing empty mach-o sections does not segfault the linker.
#

--- !mach-o
arch:            x86_64
file-type:       MH_OBJECT
...
[lld][mach-o] Avoid segfaulting when handling an empty section list. Summary: The following patch avoids segfaulting if the section list is empty when writing a mach-o MH_OBJECT. I ran into this case from a more complicated example trying to dead_strip while using '-r' in lld. I'm not sure if having empty sections is a legal mach-o, but it does seem that other llvm-binutils tools can ingest such a boring object with out issue. Would it be better to emit an error, emit a warning, or do nothing? It seems that adding a warning diagnostic might be helpful to users, as I did not expect to have a section-less object when the linker was done. Reviewers: kledzik, ruiu Subscribers: llvm-commits, jrm Tags: #lld, #llvm Differential Revision: https://reviews.llvm.org/D67735 llvm-svn: 372995 2019-09-27 01:03:20 +08:00			`# RUN: ld64.lld -arch x86_64 -r %s -o %t`
			`#`
			`# Test that writing empty mach-o sections does not segfault the linker.`
			`#`

			`--- !mach-o`
			`arch: x86_64`
			`file-type: MH_OBJECT`
			`...`