On 2013-02-17 15:10:35 +0000, Greg Stark wrote:
> Peter G is sitting near me and reminded me that this issue came up in the
> past. Iirc the conclusion then is that we're calling memcpy where the
> source and destination pointers are sometimes identical. Tom decided there
> was really no realistic architecture where that wouldn't work. 

I am not so convinced that that is safe if libc turns that into some
optimized string instructions or even PCMPSTR...

> We're not calling it on overlapping nonidentical pointers.

Yup, the backtrace shows that...


Andres Freund

 Andres Freund                     http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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