Doing any modification to the source code to prevent this is not a good design. C/C++ is not designed for this use case, so it's going to create a mess if one will try to work around this. This might lead to similar problems that premature optimization does to the code. Instead the solution should be on hardware level, like in airplanes. Put three computers in radiation environment. Then put a forth computer that'd analyze the computing results from the three computers and do action only when there 3 out of 3 or 2 out of 3 computers agree on the result. Or average / median can be applied, depending on the task. Ideally the fourth computer needs to be put in non-radioactive environment. If not possible, that still simplifies the problem somewhat. Because only the final forth computer who collects the data and selects the trustworthiness can contain bugs, not the rest of the code.