Re: [RFC PATCH] UBSan: run-time undefined behavior sanity checker

[Peter Zijlstra]

On Mon, Oct 20, 2014 at 02:54:59PM +0400, Andrey Ryabinin wrote:
> 
> UBSan uses compile-time instrumentation to catch undefined behavior (UB).
> Compiler inserts code that perform certain kinds of
> checks before operations that could cause UB.
> If check fails (i.e. UB detected) __ubsan_handle_* function called.
> to print error message.
> 
> So the most of the work is done by compiler.
> This patch just implements ubsan handlers printing errors.
> 
> GCC supports this since 4.9, however upcoming GCC 5.0 has
> more checkers implemented.

It might be useful if you've got a link to the relevant GCC
documentation of this new shiny stuf.
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