[Bug sanitizer/88054] Sanitizer triggers on valid code

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88054

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Apparently i?86 glibc has two fopen entrypoints:
   192: 000657d0    35 FUNC    GLOBAL DEFAULT   13 fopen@@GLIBC_2.1
   193: 0011ec90   144 FUNC    GLOBAL DEFAULT   13 fopen@GLIBC_2.0
and libsanitizer intercepts just fopen rather than both and during interception
calls the unversioned one returned by dlsym, which is the fopen@GLIBC_2.0.

If it wants to intercept fopen on this platform, it needs to probably intercept
both and do symbol versioning, or if it doesn't want to bother with the old one
at least should make sure to use dlvsym in this case.