Web lists-archives.com

Re: not ok 41 - test ident field is working

On Fri, May 03, 2019 at 04:18:02PM -0400, Jeffrey Walton wrote:

> I'm catching one failed self test under a sanitizer build. It looks
> like there's some latent UB present during 'make check'

How are you providing sanitizer options? If you're just putting
-fsanitize=undefined in the compiler flags, that is known to fail. For
example, on some platforms we'll default to unaligned loads when it's
faster and well-defined on that platform.

And that's what you're seeing here:

> read-cache.c:1943:22: runtime error: load of misaligned address 0x7fba278d61ab f
> or type 'unsigned int', which requires 4 byte alignment

since this is a get_be32() call.

You can can add -DNO_UNALIGNED_LOADS to fix this. However, we have some
Makefile logic for doing this already, and:

  make SANITIZE=undefined test

should work. My normal test for memory problems is:

  make SANITIZE=address,undefined test