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olliej
on Oct 6, 2022
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RFC: C++ Buffer Hardening
Can you provide examples of UB that could be unspecified behaviour, where UB does anything other than cause harm?
mgaunard
on Oct 6, 2022
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[–]
Dereferencing 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
on Oct 6, 2022
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[–]
As I said, behaviour that
could
be unspecified rather than undefined.
This is an example of something that cannot be anything other than UB.
kllrnohj
on Oct 6, 2022
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[–]
https://www.youtube.com/watch?v=yG1OZ69H_-o
is a great talk on this
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