I think that's it, exactly.  A lot of information, as expected, but I
can write something to parse it and find what I actually need.
That "memview" also looks useful but probably would have required some
changes. This does exactly what I need.
Thanks a lot, this is going to save me a lot of time.

On Thu, Oct 30, 2014 at 1:44 PM, Eliot Moss <m...@cs.umass.edu> wrote:
> You can get a trace of memory accesses from lackey. You would need to
> process it down a bit if all you want is counts and if you want to sort it
> by location, but it would be reasonably easy to do that.
> Eliot Moss
>
> On October 30, 2014 1:36:14 PM EDT, David Goldsmith <wiz...@houseoffire.ca>
> wrote:
>>
>> Hi,
>> is there something in the Valgrind tools that will give me some kind
>> of map of all memory accesses?  I have a chunk of memory and I want to
>> know what parts of it are read from, which are written to, and which
>> are never touched at all.  Cachegrind seems to almost do this, it
>> takes counts of when memory read/write occurs but in addition to the
>> count I also need to know the exact location that it is accessing.
>> Does this functionality exist somewhere in the toolset and I just
>> can't find it?
>> Thanks!
>>
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>
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.

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