Defined in 3 files as a macro:
- external/gpl3/gcc.old/dist/libsanitizer/tsan/tsan_interceptors.cc, line 139 (as a macro)
- include/unistd.h, line 255 (as a macro)
- sys/external/bsd/compiler_rt/dist/lib/tsan/rtl/tsan_interceptors.cc, line 144 (as a macro)