Let's make the TSan external API available and commented in the public header:
void *__tsan_external_register_tag(const char *object_type);
void __tsan_external_assign_tag(void *addr, void *tag);
void __tsan_external_read(void *addr, void *caller_pc, void *tag);
void __tsan_external_write(void *addr, void *caller_pc, void *tag);
Differential Revision: https://reviews.llvm.org/D32358
llvm-svn: 301003