Re: Can gcc itself be tested with ubsan? If so, how?

[Erick Ochoa <eochoa@gcc.gnu.org>]

Hi,

just as a note. This is also of interest to me. I have wanted to
compile a single pass that I wrote using ubsan/other sanitizers for
testing purposes. I was wondering if someone has already modified the
build system to use ubsan to test their passes and if they could
document the process for doing so. For these purposes, I don't really
care if it can be done only without bootstrapping. I haven't
investigated enough to find out if it is possible, but I suspect it is
and may have already been done.

Thanks!

On Tue, 28 Sept 2021 at 01:01, Gary Oblock via Gcc <gcc@gcc.gnu.org> wrote:
>
> I tried just adding "-fsanitize=undefined" to my CXX_FLAGS and got
> a bunch of errors like this:
>
> /usr/bin/ld: ../libcody/libcody.a(server.o): in function `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider::~_Alloc_hider()':
> /usr/include/c++/9/bits/basic_string.h:150: undefined reference to `__ubsan_handle_type_mismatch_v1'
>
> They all seemed library related.
>
> Can ubsan be used on the compiler itself?
>
> Thanks,
>
> Gary
>
>
>
>
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