Re: stap make check - process_test and sched_test failure

[Li Guanglei <guanglei at cn dot ibm dot com>]

Roland McGrath ??:
> > I use "readelf -w" to get the DWARF info of my kernel:
> > ...
> >   <1><671e1>: Abbrev Number: 77 (DW_TAG_subprogram)
> >       DW_AT_sibling     : <67316>
> >       DW_AT_name        : (indirect string, offset: 0x5525): handle_signal
> >       DW_AT_decl_file   : 1
> >       DW_AT_decl_line   : 1008
> >       DW_AT_prototyped  : 1
> >       DW_AT_type        : <5e0be>
> >       DW_AT_inline      : 1      (inlined)
>
> This is what's called the "abstract" entry for the inline function.  It has
> the information that's general to all instantiations.  It does not have the
> information that's particular to each instantiation.  (This is the
> structure of the info even if there is only one instantiation, i.e. only
> one call anywhere in the source code.)
>
> There should also be a DW_TAG_inlined_subroutine entry.  You can find the
> right one by looking for a DW_AT_abstract_origin attribute of <671e1>.
>
>
> Thanks,
> Roland
Here is the DW_TGA_inlined_subroutine and the loc info:
...
 <2><66bf9>: Abbrev Number: 48 (DW_TAG_inlined_subroutine)
     DW_AT_sibling     : <66d87>
     DW_AT_abstract_origin: <671e1>
     DW_AT_low_pc      : 0xda70
     DW_AT_high_pc     : 0xdbe4
     DW_AT_call_file   : 0
     DW_AT_call_line   : 0
 <3><66c14>: Abbrev Number: 54 (DW_TAG_formal_parameter)
     DW_AT_abstract_origin: <671f3>
     DW_AT_location    : 66492  (location list)
 <3><66c1d>: Abbrev Number: 49 (DW_TAG_formal_parameter)
     DW_AT_abstract_origin: <671ff>
 <3><66c22>: Abbrev Number: 49 (DW_TAG_formal_parameter)
     DW_AT_abstract_origin: <6720a>
 <3><66c27>: Abbrev Number: 49 (DW_TAG_formal_parameter)
     DW_AT_abstract_origin: <67216>
 <3><66c2c>: Abbrev Number: 54 (DW_TAG_formal_parameter)
     DW_AT_abstract_origin: <67222>
     DW_AT_location    : 66527  (location list)
 <3><66c35>: Abbrev Number: 54 (DW_TAG_formal_parameter)
     DW_AT_abstract_origin: <6722e>
     DW_AT_location    : 66581  (location list)
...