dwz-0.1 - DWARF compression tool

Jakub Jelinek jakub@redhat.com
Thu Apr 19 16:09:00 GMT 2012

On Wed, Apr 18, 2012 at 09:36:57AM +0200, Jakub Jelinek wrote:
> I'd like to announce dwz-0.1, a DWARF compression tool I've spent this
> April hacking on.  It is currently (see below) written as standalone tool,
> with minimal dependencies (though time hasn't been spent on portability
> yet, so assumes glibc host), in particular just a small amount of code
> in it depends on libelf (tested with elfutils only), in C.
> The tool parses DWARF2+ debug info, finds matching DIEs between different
> CUs that might be moved to new CUs with DW_TAG_partial_unit, estimates
> whether it is worthwhile, if it is, moves it there and adds
> DW_TAG_imported_unit DIEs (a tree of them) to make sure every CU includes
> all the needed DIEs.  DW_TAG_imported_unit DIEs created by this tool
> will only be direct children of DW_TAG_{compile,partial}_unit DIEs, if
> something from a named namespace/module can be shared, the DW_TAG_namespace
> or DW_TAG_module DIE with the same DW_AT_name is added in the partial unit
> as well.

FYI, Frank Eigler has been so kind to create git repo for this, so the
0.1 release plus all bugfixes and improvements since then are in the


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