AddressSanitizer and the GC

[Johan Engelen via Digitalmars-d]

On Friday, 21 July 2017 at 21:37:39 UTC, Johan Engelen wrote:
> On Friday, 21 July 2017 at 20:53:18 UTC, Walter Bright wrote:
>> On 7/21/2017 12:06 PM, Johan Engelen wrote:
>> < [...]
>>
>> Another option is to use a pointer to the asan functions, like:
>>
>>     if (asan_fp)
>>         (*asan_fp)(args...)
>>
>> The asan_fp can then be set to NULL and there's only the 
>> overhead of a compare/branch rather than a function call. 
>> Well, also the load of a global variable.
>
> I can mark the if-clause as unlikely, so the performance 
> difference would be small (allocation is slow already, of 
> course).

Quick extra note: the function pointer solution is not friendly 
to LTO, whereas a weak-linking solution would easily be 
optimized-out fully with LTO. So that's something to consider too.