REGISTER_FIELD    845 src/platform-macos.cc       sample->pc = reinterpret_cast<Address>(state.REGISTER_FIELD(ip));
REGISTER_FIELD    846 src/platform-macos.cc       sample->sp = reinterpret_cast<Address>(state.REGISTER_FIELD(sp));
REGISTER_FIELD    847 src/platform-macos.cc       sample->fp = reinterpret_cast<Address>(state.REGISTER_FIELD(bp));