[SOLVED] variable if I can have breakpoints or not
lazarus / 12-Debugger

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Pascaluvr · 2012-04-11 07:23

This is really weird.

I was having a problem with a program and set a breakpoint just before
where I thought the problem started.  That worked fine and was able to
step through the code.  I thought I had discovered the problem and so
I reset the breakpoint  and allowed my program to finish.

I fixed the problem and recompiled and ran again.  Still had a
problem, so I wanted to set the breakpoint again.   No such luck - the
little circles in the trough disappeared and clicking in the trough
just gave me a '?'. 

I managed to get the debugging working by:
Clicking the line of code I wanted a breakpoint at
and the Clicking - Run to curser.

I am not suggesting this is a bug - its probably something stupid I am
doing.  Any ideas would be appreciated.

Win 7 Ultimate 64 bit
Laz 0.9.30.4
FPC 2.6.0
svn 35940
i386-win32-win32/win64  (running fpc/laz 32 bit on a win7 64 bit)

Thanks in advance

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Martin_fr · 2012-04-11 10:57

See

http://wiki.lazarus.freepascal.org/Debugger_Setup
After running the app
do you get the blue dots next to the line numbers?


if you hav many try/except
http://bugs.freepascal.org/view.php?id=20183

if persits
http://wiki.lazarus.freepascal.org/GDB_Debugger_Tips#Check_existing_Re
ports


What is in the "debug output"

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Pascaluvr · 2012-04-11 17:29

Hi Martin,

I initially had the blue dots in the gutter and thats how I initially
set the breakpoint.  Used this for a few iterations and all was fine.

When I clicked on the breakpoint to turn it off, all the blue dots
disappeared as well.  Obvious if I click in the gutter now I get a
'?'.  I can still use the debugger though by  clicking on the line of
code and then using the 'Run to Cursor' option - which works well, but
obviously restricts me to one breakpoint.   (also not a big issue at
the moment).

The only thing in my setup that I didn't have the same was I didn't
have 'Generate dwarf debug  ....' checked.  I have done so now and
will play with this again tomorrow,  but that hasn't returned the blue
dots.    BTW what does dwarf do?  I thought dwarf was an alternative
debugger to GDB?

Also I have tried stopping and starting Lazarus and even rebooting,
but the blue dots refuse to return.

Thanks for your help.

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User137 · 2012-04-11 18:12

You can also try F5 to add breakpoints.

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garlar27 · 2012-04-11 18:25

AFAIK the blue dots are visible only while the project is running
under Lazarus. Once execution has stopped they disappear.

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Pascaluvr · 2012-04-11 19:37

Quote from: User137 on April 11, 2012, 08:12:56 pmYou can also try F5
to add breakpoints.

yep ... also comes up with a '?' in the gutter

thanks for the reply

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Pascaluvr · 2012-04-11 19:39

Quote from: garlar27 on April 11, 2012, 08:25:00 pmAFAIK the blue dots
are visible only while the project is running under Lazarus. Once
execution has stopped they disappear.

ahha!!!!  just shows how little I use the debugger and how unobservant
I am:)

Thank you ...  that explains it all