__clang_call_terminate doesn't have unwind table with -funwind-tables

[efriedma-quic]

Bugzilla Link	41351
Version	unspecified
OS	Windows NT
CC	@compnerd,@francisvm,@froydnj,@zygoloid

Extended Description

C++ testcase:

void target(void f()) noexcept { f(); }

If you compile this with "--target=aarch64-eabi -funwind-tables", the unwind tables are missing for __clang_call_terminate. I think it's somehow forgetting to attach the uwtable attribute to the definition of __clang_call_terminate.

[froydnj]

Is this related to bug 40876 at all?

[efriedma-quic]

Not really? I mean, I guess this might be an issue on Windows as well, but it's not platform-specific.

[xgupta]

Hi @efriedma-quic,

I have tried this command -
./clang --target=aarch64-eabi -funwind-tables test.cpp -c -o clang-arm.o
llvm-objdump -D clang-arm.o > clang-arm

with clang-arm is uploaded here - https://gist.github.com/xgupta/ad644b69ab8e8ec9a30a8a5281d74d3d

It does have eh_frame section. what should be the expectation here?

[efriedma-quic]

The function target() has an unwind table; the issue is that the synthesized function __clang_call_terminate doesn't.