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DDD looking for source file with IP address?

From: R. Bernstein
Subject: DDD looking for source file with IP address?
Date: Thu, 8 Dec 2005 09:12:49 -0500

mark_2811 writes:
 > Hi,
 > I've got a strange problem with DDD (v ).  When a breakpoint gets hit, DDD 
 > pops up a dialog saying "DDD: No Source".  It seems to be searching for a 
 > source file named "" in the directory where my executable is 
 > located.  I searched on google and couldn't find any other references to 
 > this issue, has anyone here seen it before?  Why would it think my 
 > computer's IP address is the name of a source file??

There are a number of important details missing which makes it only
possible to answer to answer this in a general. The short answer is
that in parsing the position gdb sees that IP address where it is
expecting a file name.

Here's a suggestion to track down the problem. Let's suppose you are
debugging the C program sample.c given the distribution. I set a
breakpoint and ran the program. Now when I stop at the breakpoint,
since gdb is the underlying debugger, I know that to get history in
gdb I run "show commands". I do that and see after the "run"

  165  run
  166  info breakpoints

Okay. So now I run "info breakpoints" (which I didn't invoke but ddd
did) and I see:

(gdb) info breakpoints
Num Type           Disp Enb Address    What
1   breakpoint     keep y   0x08048544 in main at sample.c:31
    breakpoint already hit 1 time

So the guess is somewhere under "Address" or "What" you'll see that IP

Let's take a different example, one closer to home, debugging a Bash
program with my debugger. Here on my GNU/Linux computer I run: 

ddd --bash /etc/init.d/network status 

and I set a breakpoint. Again to get the history enter "show
commands" works. (So does "H" as you might use for perl).

Running "show command", I now get this: 

29: L 
28: break /etc/init.d/network:16
27: cont 

"L" is the same thing as "info breakpoints" but ddd has been set to
issue "L" rather than "info breakpoints". So now when I run "L" I see

Num Type       Disp Enb What
1   breakpoint keep y   /etc/init.d/network:20
        breakpoint already hit 1 time

Here there is no "Address" field, but still a "What" field and in fact
that's what ddd parses on.

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