[fpc-devel] dwarf debug info bugs

[Jonas Maebe]

On 04 Dec 2009, at 12:57, Paul Ishenin wrote:

> Paul Ishenin wrote:
>> Marc has exmplained me why I have the strange stepping. It is due to internal try finally which is generated for variants.
>> 
>> I think the solution is to set the same line number for that try-finally nodes as for the variant itself.
>> 
>> Or as Marc suggested - skip generation of line info for the internal try blocks.
> I made more tests and Variants are not related to the problem.
> 
> Then next simple application also has problems with stepping:
> program project1;
> 
> {$mode objfpc}{$H+}
> 
> uses
> SysUtils, Classes;
> var
> List: TList;
> begin
> // you need to step into 2 times to be in the TList constructor. In the constructor you will visit first and last lines 2 times
> List := TList.Create;
> List.Free;
> end.

A constructor also has an implicit try/finally, so the fact that you visit the first and last lines twice is probably the same thing as with the variant. I cannot reproduce the need to "step into" twice on either Mac OS X/i386 or Linux/i386.


Jonas