[Bug default/27363] New: Emit more detailed diagnostic output for "Unknown DWARF"

[d.filder at web dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=27363

            Bug ID: 27363
           Summary: Emit more detailed diagnostic output for "Unknown
                    DWARF"
           Product: dwz
           Version: unspecified
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: default
          Assignee: nobody at sourceware dot org
          Reporter: d.filder at web dot de
                CC: dwz at sourceware dot org
  Target Milestone: ---

The terseness of the current "Unknown DWARF" error messages makes it
very difficult to analyze what is going on in cases of not yet
parseable or standard-violating DWARF data.  They should give more
information, namely include:

- a hexdump of the data around the offending entity,
- whether the entity is invalid (get_DW_*_name()==NULL) or merely not
  yet handled by the code,
- current values of DW_AT_{name,producer,comp_dir,language,...},
- and instructions to include that output in the bug report and retain
  a copy of the unstripped binary for upload upon request.

>From my cursory understanding the 3rd item might be easily
implementable with global variables holding copies of the most
recently seen values.

Regards,
Dennis.

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