Using LLVM/Clang's MemorySanitizer + AddressSanitizer

[aliireza]

Hi,

I think we should start testing FastClick with LLVM/Clang's MemorySanitizer and AddressSanitizer and perhaps integrating them with Travis.

I opened this issue to remember it :-p

Alireza

[tbarbette]

Yes, good idea! However I would not file this as a bug, but everything it finds will :p

[pallas]

You'll want to disable code that pools or shares memory, e.g. every skb clone that might just add a ref should instead return a new skb. It's been a while since I looked at the codebase but IIRC there is stuff like that in string handling too. Otherwise the lifetime of these allocations is long and wild and ASAN / MSAN will take much longer to flag errors.