Re: [DynInst_API:] commit: symtab and parseAPI optimizations now on master

[Bill Williams <bill@xxxxxxxxxxx>]

On 02/05/2015 11:05 AM, Bill Williams wrote:
> I've just merged various SymtabAPI and ParseAPI memory optimizations
> back to our master branch. This work covers the following things:
>
> 1) Line information is now parsed per-CU, provided that you ask for the
> file/line corresponding to an address. Other line information queries
> still require a full line info parse.
> 2) Symbols' demangled names are generated on-the-fly, rather than being
> stored persistently. This should result in lower memory overhead, some
> additional startup time (as building the demangled name indexes has
> become more expensive), and roughly comparable query speeds (we're
> replacing a log n set of string compares with a hash and a demangle).
> 3) ParseAPI's block and function extent data structures should consume
> much, much less space in the common case (mostly non-overlapping blocks
> and functions). It is possible that there will be a small CPU tradeoff
> for some users.
> 4) StackwalkerAPI no longer accidentally triggers a full binary parse by
> asking ParseAPI for the blocks containing a given address.
>
> IMPORTANT INTERFACE CHANGES: the Symbol class has been revised in line
> with my recent RFC to provide foo_names_begin/foo_names_end accessors.
> The old container-style interfaces *must* be discarded in order for
> optimization 2) to actually work. This has propagated through various
> users of symbol names; many interfaces that were returning string
> references now must return strings by value, and the getCallee method in
> BPatch_loopTreeNode now returns a std::string rather than a const char*.
>
> This is not an official release, but users who are interested in these
> optimizations are encouraged to try them out.
Note, also, that this is likely to require a clean build of Dyninst 
(make clean suffices). I should have mentioned this initially.
> --bw
>
> Bill Williams
> Paradyn Project
> bill@xxxxxxxxxxx
> _______________________________________________
> Dyninst-api mailing list
> Dyninst-api@xxxxxxxxxxx
> https://lists.cs.wisc.edu/mailman/listinfo/dyninst-api

--
--bw

Bill Williams
Paradyn Project
bill@xxxxxxxxxxx