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Can you provide examples of UB that could be unspecified behaviour, where UB does anything other than cause harm?
by olliej 4y ago
Can you provide examples of UB that could be unspecified behaviour, where UB does anything other than cause harm?
- mgaunard 4y agoDereferencing a pointer to memory that doesn't point to a live valid object is undefined behaviour. You couldn't possibly specify what this does without instrumenting every single access to memory, like asan or valgrind does.
- olliej 4y agoAs I said, behaviour that could be unspecified rather than undefined. This is an example of something that cannot be anything other than UB.
- kllrnohj 4y agohttps://www.youtube.com/watch?v=yG1OZ69H_-o https://www.youtube.com/watch?v=yG1OZ69H_-o is a great talk on this