Re: [DynInst_API:] Snippets that need libs that the mutatee does not reference

[Wayne Motycka <wmotycka@xxxxxxxxxxx>]

Bill Williams <bill <at> cs.wisc.edu> writes:
...
> There are a couple of ways you can go here, with varying levels of 
> programmer and execution overhead. You can use BPatch_malloc to create 
> instrumentation variables of complex data types and manipulate their 
> fields with snippets, or you can inject an instrumentation library. The 
> standard technique when using an instrumentation library would be to 
> insert a call to some function that updates your assorted in-memory data 
> structures. In either case, you'd then register an exit callback that 
> will serialize the results to disk. The instrumentation library tends to 
> be easier to implement, and as your data structures grow more complex, 
> it will tend to be more efficient as well.
> 

Ah, instrumentation library sounds like the way to go then.  If I understand
this it means that I'd need to define the in-memory data structure that
the instrumentation library would manipulate/update and the exit callback
would access this data structure to write it to disk, right?

Also, the library should be a shared lib (.so) and not an archive (.a), right?

-Wayne