Method BlockSignals

core/utils/syscallthread.cc:140–142

* Blocks most (all==false) or all (all==true) signals. Called from * the {Push,Pop}Defer methods of SyscallThreadAny. */

 * the {Push,Pop}Defer methods of SyscallThreadAny.
 */
void SyscallThreadAny::BlockSignals(bool all) {
  PthreadSetSigmask(GetMask(all));
}

/*
 * Runs the knock thread: keeps kicking the normal thread until