Defined in 2 files as a typedef:
- external/gpl3/gcc.old/dist/libsanitizer/sanitizer_common/sanitizer_allocator_size_class_map.h, line 232 (as a typedef)
- sys/external/bsd/compiler_rt/dist/lib/sanitizer_common/sanitizer_allocator_size_class_map.h, line 234 (as a typedef)