[bug #33172] DDD has problems parsing Temporary breakpoints

[Matheus Ribeiro]

URL:
  <http://savannah.gnu.org/bugs/?33172>

                 Summary: DDD has problems parsing Temporary breakpoints
                 Project: DDD
            Submitted by: matferib
            Submitted on: Wed 27 Apr 2011 05:10:06 PM GMT
                Category: Breakpoint/Watchpoint
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: None

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Details:

There is a bug in DDD when setting temporary breakpoints (which is also used
by other commands, like set execution point). The answer received from GDB is
something like 

Breakpoint X at ADDRESS: file FILENAME, line LINE. << for breakpoints
Temporary breakpoint X at ADDRESS: file FILENAME, line LINE. << for tbreaks

In PosBuffer.C, there is a function which parses gdb answers and acquires
information from it: gdb_filter. This function tries several cases, one of
them is the UP and DOWN command outputs, with this if statement:

<code>
        int at_index = answer.index(" at ");
        int br_index = answer.index("Break");
        if ( (at_index > 0) && (br_index < 0) )
</code>

As can be see, it looks for an "at" string at sentence not started by Break.
But his comparison is bugged for temporary breakpoints, the correct code is:

<code>
        int at_index = answer.index(" at ");
        int br_index = answer.index("Break");
        int tbr_index = answer.index("Temporary break");
        if ( (at_index > 0) && (br_index < 0) && (tbr_index < 0) )
</code>

This will avoid many weird messages like: cannot find file /usr/src/0x12345
for example. Also it will avoid many unecessary info sources by ddd trying to
find this weird file. If anyone wants a patch, let me know.




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