Re: __ubsan_handle_type_mismatch converted to __ubsan_handle_type_mismatch_v1

[Andrey Ryabinin]

On 10/06/2017 05:29 AM, Sodagudi Prasad wrote:
> Hi All,
> 
> Based on below links __ubsan_handle_type_mismatch has been renamed to __ubsan_handle_type_mismatch_v1.
> 
> https://github.com/llvm-mirror/compiler-rt/commit/56faee71af1888ba12ab076b3d1f9bbe223493df#diff-21369cc6f3917b27df3ced8de89cf134
> https://www.mail-archive.com/gcc-bugs@xxxxxxxxxxx/msg535130.html
> 
> 
> When I tried to compile the kernel with LLVM seen following errors.
> arch/arm64/kernel/traps.o: In function `dump_backtrace':
> kernel/arch/arm64/kernel/traps.c:192: undefined reference to `__ubsan_handle_type_mismatch_v1'
> kernel/arch/arm64/kernel/traps.c:192: undefined reference to `__ubsan_handle_type_mismatch_v1'
> kernel/arch/arm64/kernel/traps.c:192: undefined reference to `__ubsan_handle_type_mismatch_v1'
> kernel/arch/arm64/kernel/traps.c:192: undefined reference to `__ubsan_handle_type_mismatch_v1'
> arch/arm64/kernel/traps.o: In function `dump_mem':
> 
> 
> Can I add __ubsan_handle_type_mismatch_v1 API similar to __ubsan_handle_type_mismatch()(I will send path for review)?
> If both apis are present, then there will be backward compatibility. Let me know if you have any other suggestions for this issue.

Sounds good, send the patch please.

> 
> -Thanks, Prasad
>