Re: Dwarf expertise needed

[Sami Wagiaalla <swagiaal@redhat.com>]

Roland McGrath wrote:
>> Okay it sounds like I missunderstood what addrdie does. I guess what I 
>> am trying to do is find the narrowest scope which contains the given pc. 
>> Is there a way to get all dies whos ranges contain the pc maybe ? The 
>> problem I am trying to solve is given a pc find the inlined/concrete 
>> function that contains it.
>>     
>
> This is what dwarf_getscopes is for.
>   
Okay so I have been looking at dwarf_getscopes.c trying to find a fix 
for  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=230235.

Now i can fudge the function pc_record to return the results that I am 
expecting but it looks like it is trying to do something different from 
what I understand when it comes to inlined functions.

It looks like getscopes is trying to return the scopes from narrowest up 
to the scope before the concrete inlined instance then the abstract 
definition of the concrete instance, and then the scopes that contain 
that. Is this a correct understanding of the code ?

What I am expecting it to return is the the scopes from narrowest to and 
including the scope corresponding to the concrete inlined instance, then 
the function within which it has been inlined and the scopes containing 
that; as per the dwarf spec. Is this a correct understanding of what the 
function /should/ do ? And should I fix the function, write a parallel 
one that does what i want, or is there another code pathway to get it ?


Cheers,
   Sami Wagiaalla