Re: merging of gcov's .da data files

[Nathan Sidwell <nathan at codesourcery dot com>]

Uttam Pawar wrote:
> Hi,
>
> Is there a way or a utility to merge, multiple data (.da) files
> generated by gcov for same executable but with different test data set?
> I know, gcov supports merging of data from multiple run of a program but
> the condition is not to remove or move older data files. It will be
> useful if gcov merges the data even if the older data files don't reside
> in the same directory. 
> Having an environment variable which points to a directory where these
> files are located is one way to solve this issue. Another way to have
> external utility which does the merging.
It should be relatively straight forward to get gcov's read_count_file
function to read & merge multiple files -- it can merge from one file
after all.

> Also, it will be useful to show just the differences between multiple
> data files generated from different executable (due to different
> platforms) but compiled using same source code, probably with same
> options.
Unless those targets are very similar, the basic block graphs are likely
to be different.  Perhaps some post processing of separately generated
gcov output could be done?

nathan
--
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk