Debugging a C++ problem in GDB on linux

Debugging a C++ problem in GDB on linux

[yinglcs2]

Hi

I am trying to debug a C++ program in GDB on linux.
I want to dump out the content of the "this" object,
Here is what I get:
(gdb) print *this
$2 = {path = <incomplete type>}

My question is why I don't see the content of 'path'?
It said
'<incomplete type>'.

In the code, path is:
ostringstream path;

When I try to do this: at GDB prompt 'print
this->path.str()' , I get
this error:

(gdb) print this->path.str()
Couldn't find method ostringstream::str 


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Re: Debugging a C++ problem in GDB on linux

[Daniel Jacobowitz]

On Sat, Jan 21, 2006 at 12:35:59PM -0800, yinglcs2@yahoo.com wrote:
> Hi
> 
> I am trying to debug a C++ program in GDB on linux.
> I want to dump out the content of the "this" object,
> Here is what I get:
> (gdb) print *this
> $2 = {path = <incomplete type>}
> 
> My question is why I don't see the content of 'path'?
> It said
> '<incomplete type>'.
> 
> In the code, path is:
> ostringstream path;
> 
> When I try to do this: at GDB prompt 'print
> this->path.str()' , I get
> this error:
> 
> (gdb) print this->path.str()
> Couldn't find method ostringstream::str 

This is often a consequence of having no debug information for the C++
standard library.  However, there's always a chance it's a bug in GDB;
can you post a complete testcase?

-- 
Daniel Jacobowitz
CodeSourcery