Re: "info locals" -- is variable initialized

[Vladimir Prus <ghost@cs.msu.su>]

On Friday 02 September 2005 17:13, Daniel Jacobowitz wrote:
> On Fri, Sep 02, 2005 at 01:53:41PM +0400, Vladimir Prus wrote:
> > So, there's a window there variable does not exists according to C++, but
> > exists according to gdb.
>
> With better debug information, this doesn't happen (or the window is
> reduced to an instruction or two in the call sequence for the
> constructor).  GCC 4's variable tracking feature does this passably
> well, IIRC, by use of dwarf2 location lists.

Do I need for extra flags for gcc? I've tried with gcc-4.0 before posting the
message, and it did printed all vars.

> In general no there is nothing gdb can do.

How about using decl_line. Here's what debug info says

   <2><2188c>: Abbrev Number: 140 (DW_TAG_variable)
     DW_AT_name        : url
     DW_AT_decl_file   : 1
     DW_AT_decl_line   : 14
     DW_AT_type        : <1d555>
     DW_AT_location    : 3 byte block: 91 98 7f         (DW_OP_fbreg: -104)

If gdb could tell the value of 'decl_line' via some command, that might be a 
good approximation.

- Volodya