We as GCC still emit __asan_global_source_location for global variables
and we would like to use it in the future. On other hand, we don't
support llvm-symbolizer and the default libbacktraace symbolizer
does not support location info.
Related to: https://reviews.llvm.org/D127552
can you please make this gcc_location, and add a comment explaining that clang uses DWARF for asan global symbolization rather than inlining it in the metadata.