Re: [libunwind] core file unwinding?

[Mike Bennett]

David Mosberger wrote:

>  Mike> My next step was to build an implementation of a corefile
>  Mike> reader using the libunwind-ptrace.h style, but I thought I'd
>  Mike> ask to see if I've overlooked something before starting.
>
> That's probably not the right way to go.  The right approach is to use
> unw_create_addr_space() and to provide access_mem/access_{fp,}reg
> callbacks which read the core-file.
>  
Ah, sorry if I wasn't clear.

I just meant I'd use the implementation's *style*: that is, making a
header file that contains a unw_accessor_t object and something
similar to _UPT_create(pid) to create a core file reader backend,
*not* to actually use the ptrace implementation.

I might need some external callbacks in the corefile reader
as well to make it a bit more platform independent, but I'm
not quite sure what those look like, yet.

> It sure would be nice to have a libunwind-core so folks like yourself
> don't have to constantly reinvent the wheel.  I'm willing to answer
> questions but I'm afraid I'm too busy with other things at the moment
> to do this myself.
>  
I'll build things with an eye towards contributing it back. When I
get it working I'll let you know.

thanks!
 -mike