[PATCH] D49750: Add support for ARM and ARM64 breakpad generated minidump files.

[Pavel Labath via llvm-commits]

I've reverted this to keep the bots green until the issues pointed out
by Stella and Raphael are resolved.

Based on a quick inspection, it seems that the test issue is that
`GetSystemInfo` call that has been added to MinidumpParser::Initialize
is failing. I guess that's because the hand-crafted(?) minidumps for
these tests don't contain the necessary data.

For the -Wextended-offsetof issue, the way that other register
contexts avoid those is by factoring this out into two offsetof
expressions (offsetof(big_struct, small_struct_field) +
offsetof(small_struct, actual_field)).
On Fri, 3 Aug 2018 at 07:28, Raphael Isemann via Phabricator
<reviews at reviews.llvm.org> wrote:
>
> teemperor added a comment.
>
> I don't see this mentioned here yet, so: This patch also seems to introduce a few hundred warnings with -Wextended-offsetof (which is enabled by default on the macOS builds):
>
>   [...]llvm/tools/lldb/source/Plugins/Process/minidump/RegisterContextMinidump_ARM64.cpp:510:5: warning: using extended field designator is an extension [-Wextended-offsetof]
>       DEF_S(20),
>       ^~~~~~~~~
>   [...]llvm/tools/lldb/source/Plugins/Process/minidump/RegisterContextMinidump_ARM64.cpp:67:25: note: expanded from macro 'DEF_S'
>       "s" #i, nullptr, 4, OFFSET(v[i * 16]), eEncodingVector,                    \
>                           ^~~~~~~~~~~~~~~~~
>   [...]llvm/tools/lldb/source/Plugins/Process/minidump/RegisterContextMinidump_ARM64.cpp:29:20: note: expanded from macro 'OFFSET'
>   #define OFFSET(r) (offsetof(RegisterContextMinidump_ARM64::Context, r))
>                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   [...]stddef.h:120:24: note: expanded from macro 'offsetof'
>   #define offsetof(t, d) __builtin_offsetof(t, d)
>                          ^                     ~
>
> (And the tests also fail on macOS, but they are probably fixed when the Linux/Windows tests are fixed).
>
>
> Repository:
>   rL LLVM
>
> https://reviews.llvm.org/D49750
>
>
>