Convenience variable for filename in add-symbol-file not expanded

[Andrew STUBBS]

David Lamy-Charrier wrote:
> Thanks Andrew,
> 
> I already have a static buffer in the inferior program containing the
> path to the file I want to use.
> You mean that I should declare a pointer to the variable in the
> inferior program too ?
> And then how can I access the pointed value in gdb, using
> value_of_internalvar() or parse_and_eval_address() or anything else) ?

No, I mean you can create a convenience variable with type char*. The 
command language can be made to substitute convenience variables 
starting with $, but it seems a little much to expect it to unpick 
program variables as well.

So, if your string were referenced by an inferior variable 'filename', 
it would look like:
(gdb) set $name = filename
(gdb) set $address = 0x.....
(gdb) add-symbol-file $name $address

You can then use lookup_internalvar() to get the address and then read 
the string from memory somehow, get_target_memory() probably (look in 
target.h for the various options). Of course, there may be a better way 
... anyone?

HTH

Andrew