Re: [Boost-users] [Interprocess] updating elements in vector of maps fails in optimized code

Subject: Re: [Boost-users] [Interprocess] updating elements in vector of maps fails in optimized code
From: Viatcheslav.Sysoltsev_at_[hidden]
Date: 2011-05-12 07:36:15

> I also noticed that the described symptoms are not merely a result of  
> compiler optimizations. I was experimenting with different GCC  
> optimization parameters in an attempt to identify the guilty ones when I  
> noticed that even when optimizations are completely turned off, some  
> weird behavior "can" occur. When I run the snippet provided below,  
> compiled with -O0, several times, the program behaves as expected about  
> half of the times and in the other runs, the map find function will fail  
> to find any entries, resulting in a matrix consisting of ones instead of  
> twos. In higher optimization levels, the find function fails  
> consistently.

Any chance valgrind can help? Sounds like unitialized read for me.

-- Slava