Re: [tor-bugs] #7419 [Tor]: Choose a faster memwipe implementation

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#7419: Choose a faster memwipe implementation
-------------------------+--------------------------------------------------
 Reporter:  nickm        |          Owner:                  
     Type:  enhancement  |         Status:  new             
 Priority:  normal       |      Milestone:  Tor: unspecified
Component:  Tor          |        Version:                  
 Keywords:  tor-relay    |         Parent:                  
   Points:               |   Actualpoints:                  
-------------------------+--------------------------------------------------

Comment(by nickm):

 The volatile-based thing is actually pretty sure to work, assuming that
 the compiler isn't busted.  It turns out that it's pretty slow in
 practice, though. Another way to use volatile is:

 {{{
     void * (* volatile memset_volatile)(void *, int, size_t) = memset;
     ...
     memset_volatile(p, c, n);
 }}}
 (via a NetBSD mailing list at http://netbsd.2816.n7.nabble.com/Adding-
 memset-s-function-td43349.html .)

 Another option is the memset_s() function added in the the C11 standard.
 Other than MS, though, I don't think any of the libcs we use support it
 yet.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7419#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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