[fpc-pascal] Logging full runtime-error/exception backtrace

[Sven Barth]

Am 20.02.2012 15:58, schrieb leledumbo:
> I want to log the full runtime-error/exception backtrace to a file. I've
> tried all methods explained
> http://wiki.lazarus.freepascal.org/Logging_exceptions here  but none seems
> to give the full backtrace. i.e. when compiled with -gl, instead of just the
> address, I could also get "line NN of file XX.pas". How could I do it?

The resolution of file and address can only be done if your code is a) 
compiled with debug info and b) some code is available that can 
translate the debug info to the output. The first is done by "-g", while 
the second is done by adding the "l" option. The latter adds the unit 
lineinfo or lnfodwrf depending on the debug format used by the compiler.

So in summary: if you want to have full output of the backtrace, then it 
is wisest to use "-gl" and then one of the approaches mentioned on the 
wiki page (e.g. DumpExceptionBackTrace(SomeFile) ).

If you don't want to include the debug information with your application 
(e.g. space reasons) then compile your application using "-Xg" which 
will create a file "appname.dbg" which will contain the debug info (you 
don't need to redistribute this file). On an exception you simply log 
the addresses and then you can convert these addresses to line/file by 
using gdb and the created ".dbg" file (more details on this if you want 
to follow that approach).

Regards,
Sven