[all-commits] [llvm/llvm-project] 2e365c: [DebugInfo/llvm-objdump] - Print "ZERO terminator"...

[Georgii Rymar via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 2e365ca2f7ce7a1f4a3938d79b894324b383ce5c
      https://github.com/llvm/llvm-project/commit/2e365ca2f7ce7a1f4a3938d79b894324b383ce5c
  Author: Georgii Rymar <grimar at accesssoftek.com>
  Date:   2020-05-26 (Tue, 26 May 2020)

  Changed paths:
    M llvm/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
    M llvm/test/tools/llvm-objdump/eh_frame-mipsel.test
    M llvm/test/tools/llvm-objdump/eh_frame_zero_cie.test

  Log Message:
  -----------
  [DebugInfo/llvm-objdump] - Print "ZERO terminator" for terminator entries when dumping .eh_frame.

A CIE with the Length == 0 is a terminator:
https://refspecs.linuxfoundation.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html

And GNU objdump recognizes them and prints the following for such entries:

"00000000 ZERO terminator"

This patch teaches llvm-objdump to do the same. I had to update tests to use
"CHECK-NEXT" too.

(Note: it looks perhaps not right that printing is done inside the DebugInfo library,
I'd expect to see the change in the llvm-objdump's code somewhere instead,
but that is how it done atm).

Differential revision: https://reviews.llvm.org/D80476