Thread Subject: How to Save Breakpoints?

Hi,
Whenever my Matlab program is debugged, the previously set
breakpoints disappear. If I debug once again, I have to
reset the breakpoints. How to set the breakpoints just for
once and keep them until I delete them?
Thanks in advance!
lehe

In article <g62qmd$ht$1@fred.mathworks.com>, Le He <flylehe@hotmail.com> wrote:
>Whenever my Matlab program is debugged, the previously set
>breakpoints disappear. If I debug once again, I have to
>reset the breakpoints. How to set the breakpoints just for
>once and keep them until I delete them?

help clear

    CLEAR ALL, CLEAR FUN, or CLEAR FUNCTIONS also have the side effect of
    removing debugging breakpoints and reinitializing persistent variables
    since the breakpoints for a function and persistent variables are
    cleared whenever the m-file changes or is cleared.


My guess is that you have a 'clear all' in your routine that you should
get rid of.

If you need to save your breakpoints between matlab sessions,
then you can create a startup.m file (see the doc on 'startup')
which checks for a breakpoint definition file in your
current directory and runs it if it finds it. You can save
your breakpoints with something like,

function savebreakpoints
  s = dbstatus;
  if isempty(s); return; end
  fid = fopen('savedbreakpoints.m','w');
  if fid < 0; return; end
  for K = 1:length(s)
    if ~isempty(s(K).cond)
      fprintf(fid, 'dbstop if %s', s(K).cond);
      fprintf(fid, ' %s', s(K).identifier{:});
      fprintf(fid, '\n');
    else
      fname = s(K).name;
      lines = s(K).line;
      exprs = s(K).expression;
      anons = s(K).anonymous > 0;
      %simplify this function by refusing to deal with @ breakpoints
      lines(anons) = [];
      exprs(anons) = [];
      for L = 1:length(lines)
        if isempty(exprs{L})
          fprintf(fid, 'dbstop in %s at %d\n', fname, lines(L));
        else
          fprintf(fid, 'dbstop in %s at %d if %s\n', fname, lines(L), ...
                       exprs{L} );
        end
      end
    end
  end
  fclose(fid);
end
--
  "Product of a myriad various minds and contending tongues, compact of
  obscure and minute association, a language has its own abundant and
  often recondite laws, in the habitual and summary recognition of
  which scholarship consists." -- Walter Pater

Thank you so much!
I have read the document of startup but still have a
question: how to check for a breakpoint definition file in
the current directory and runs it if it finds it in
startup.m? Thanks!


roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in
message <g630np$b98$1@canopus.cc.umanitoba.ca>...
> In article <g62qmd$ht$1@fred.mathworks.com>, Le He
<flylehe@hotmail.com> wrote:
> >Whenever my Matlab program is debugged, the previously
set
> >breakpoints disappear. If I debug once again, I have to
> >reset the breakpoints. How to set the breakpoints just
for
> >once and keep them until I delete them?
>
> help clear
>
> CLEAR ALL, CLEAR FUN, or CLEAR FUNCTIONS also have
the side effect of
> removing debugging breakpoints and reinitializing
persistent variables
> since the breakpoints for a function and persistent
variables are
> cleared whenever the m-file changes or is cleared.
>
>
> My guess is that you have a 'clear all' in your routine
that you should
> get rid of.
>
> If you need to save your breakpoints between matlab
sessions,
> then you can create a startup.m file (see the doc
on 'startup')
> which checks for a breakpoint definition file in your
> current directory and runs it if it finds it. You can save
> your breakpoints with something like,
>
> function savebreakpoints
> s = dbstatus;
> if isempty(s); return; end
> fid = fopen('savedbreakpoints.m','w');
> if fid < 0; return; end
> for K = 1:length(s)
> if ~isempty(s(K).cond)
> fprintf(fid, 'dbstop if %s', s(K).cond);
> fprintf(fid, ' %s', s(K).identifier{:});
> fprintf(fid, '\n');
> else
> fname = s(K).name;
> lines = s(K).line;
> exprs = s(K).expression;
> anons = s(K).anonymous > 0;
> %simplify this function by refusing to deal with @
breakpoints
> lines(anons) = [];
> exprs(anons) = [];
> for L = 1:length(lines)
> if isempty(exprs{L})
> fprintf(fid, 'dbstop in %s at %d\n', fname,
lines(L));
> else
> fprintf(fid, 'dbstop in %s at %d if %s\n',
fname, lines(L), ...
> exprs{L} );
> end
> end
> end
> end
> fclose(fid);
> end
> --
> "Product of a myriad various minds and contending
tongues, compact of
> obscure and minute association, a language has its own
abundant and
> often recondite laws, in the habitual and summary
recognition of
> which scholarship consists." -- Walter
Pater