[fpc-devel] Why debugger does not "step in"?

Martin Frb lazarus at mfriebe.de
Sat Mar 24 09:42:59 CET 2018

On 24/03/18 02:24, Gennady Agranov wrote:
> Hi,
> I use FPC 3.0.4 / Lazarus 1.8.2
> I am seeing the same behavior when I debug the program using Lazarus 
> IDE under Win64 and Linux64
> When I want to "step in" into my own function/procedure - GDB simply 
> steps over...
> If I set a breakpoint inside the function/procedure I want to "step 
> in" and "run" - it would stop at this breakpoint. 

It isn't a method of an "interface"? interfaces indeed have this issue.

But if it is a normal procedure, then this is odd.  A few things you can 

- On Windows, use an external linker (option -Xe)
- Try stabs vs Dwarf (Project Options > Debugging)
- Do NOT use smart linking
- Do NOT use any optimization -O...
- Try a diff version of gdb
- Try an older fpc (but keep all else the same). So you know if it is an 
issue with current fpc.

I also found a bug report https://bugs.freepascal.org/view.php?id=31599 
that may or may not be related.

Someone recently reported they had the opposite problem, where the 
debugger would step in, when they actually stepped over. Not sure if 

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