Parse and retrieve members of a structure

Parse and retrieve members of a structure

[Shakthi Kannan]

Hi,

I would like to know if there are any flags or options that can be
passed to gcc to retrieve the members of a struct {}? I want to be
able to compute a CRC checksum for each member of a structure in a .c
or .h file.

Or, if there is any other way to do it, please do let me know.

Thanks,

SK

-- 
Shakthi Kannan
http://www.shakthimaan.com

Re: Parse and retrieve members of a structure

[Jonathan Wakely]

On 13 January 2012 09:30, Shakthi Kannan wrote:
> Hi,
>
> I would like to know if there are any flags or options that can be
> passed to gcc to retrieve the members of a struct {}?

What do you mean by retrieve?  Get a list of member names? Names and
types? Offsets? At runtime? At compile time?

(I think the answer's no, in any case.)

> I want to be
> able to compute a CRC checksum for each member of a structure in a .c
> or .h file.

Again, I'm not sure what you mean. Do you mean compute a checksum of
the values, or the layout, or something else?  At runtime, or before
the program runs? Or after?

> Or, if there is any other way to do it, please do let me know.

You can retrieve information on object layout from DWARF debugging info.

Re: Parse and retrieve members of a structure

[Shakthi Kannan]

Hi Jonathan:

--- On Fri, Jan 13, 2012 at 3:32 PM, Jonathan Wakely
<jwakely.gcc@gmail.com> wrote:
| What do you mean by retrieve?  Get a list of member names? Names and types?
| Offsets? At runtime? At compile time?
\--

Yes, for names, types and offsets at compile time. Sorry to have not
been specific when asking the question.

---
| Again, I'm not sure what you mean. Do you mean compute a checksum of
| the values, or the layout, or something else?
\--

Checksum of the individual values during compile time.

The genksyms tool in the Linux kernel sources provides a CRC checksum
of exported functions. I would like to know if something similar can
be done for a structure and its members.

---
| You can retrieve information on object layout from DWARF debugging info.
\--

I will look into this.

Thanks for your reply,

SK

-- 
Shakthi Kannan
http://www.shakthimaan.com