[fpc-pascal] FPC Backtrace

[James Richters]

Thanks for the information.

I've used breakpoints before, but for this issue, it was happening on a computer where I did not have the compiler, so I wanted something compiled into the program that I could run on the computer with the issue and get the backtrace information.. it worked great.

Just in case anyone comes across this trying to do the same thing, the command I used was:
dump_stack(stdout,0); 
sending it to stdout as a way to get it to the console screen is not immediately obvious from the documentation at:
https://www.freepascal.org/docs-html/rtl/system/dump_stack.html
but it works great without needing to have my own file to write to.

I didn't know about setting a conditional breakpoint though, so thanks for pointing that out.. there are quite a few times I avoid breakpoints because they happen too often.. a conditional break could be handy.. I don't know if the FPC text mode IDE does that or not... unfortunately the main big project I work on all the time refuses to compile in Lazarus.  I don't remember why... it can't find some units or something.... I've tried several times to go in and address whatever it causing it to not work and I always hit a roadblock where I just don't know how to make it work... and then I need to get some real work done, so I just open the FPC Text IDE and everything is fine.

James

-----Original Message-----
From: fpc-pascal <fpc-pascal-bounces at lists.freepascal.org> On Behalf Of Graeme Geldenhuys via fpc-pascal
Sent: Monday, January 3, 2022 7:01 PM
To: fpc-pascal at lists.freepascal.org
Cc: Graeme Geldenhuys <mailinglists at geldenhuys.co.uk>
Subject: Re: [fpc-pascal] FPC Backtrace

On 2022-01-03 23:45, Graeme Geldenhuys wrote:
> On 2022-01-03 13:28, James Richters via fpc-pascal wrote:
>> I’m curious if there is some way, perhaps with some directive or 
>> something to force a debug backtrace to happen, but without an error.
> 
> Christo already offered you a solution, but to offer an alternative 
> solution... Most IDE debugging functionality (or even GDB directly) 
> allows you to set a Breakpoint with iteration count or some other 
> expression.


Here is the details for Lazarus breakpoint properties, if that might help.
 
https://wiki.freepascal.org/IDE_Window:_Breakpoints#Breakpoint_properties



Regards,
   Graeme


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