Hello all,

Using FPC, I'm writing a DLL that exports functions used by a given host process.
In order to protect the host process, it is mandatory that all exceptions are trapped in the exported function and in order to achieve that, I have the following construct in all exported functions:

function SomeFunc(SomeParam: ParamType): Boolean;
begin
   Result := False;
   try
     // do the actual work
     Result := True;
   except
     on E: TObject do
       NotifyException(E);
   end;
end;

My problem comes when I have some code that does invalid math operations, like division by zero for instance.
In that case, the raised exception is never caught by my except statement and is directly sent to the host process, making it crash badly. Is there a way to have ALL exceptions caught, regardless of their origin?

OBones wrote on Wed, 16 May 2012:

Using FPC, I'm writing a DLL that exports functions used by a given host process. In order to protect the host process, it is mandatory that all exceptions are trapped in the exported function

You are probably running into http://bugs.freepascal.org/view.php?id=12974

Jonas

Wasn't Sergei working on SEH under windows ?

Michael.

If I could just interject, How to build fpc with -dTEST_WIN64_SEH ? I've fpc/lazarus daily snapshoot, does -dTEST_WIN64_SEH in "project options"->"compiler options"->"other" will be enough for SEH support ?

best regards
tomek

t.wieckowski wrote on Wed, 16 May 2012:

If I could just interject, How to build fpc with -dTEST_WIN64_SEH ? I've fpc/lazarus daily snapshoot, does -dTEST_WIN64_SEH in "project options"->"compiler options"->"other" will be enough for SEH support ?

No. The compiler itself has to be recompiled with that option.

Jonas

Am 16.05.2012 13:35, schrieb

But only for Win64, not Win32.

Regards,
Sven

Yes, looks like it indeed.
I'll experiment with the proposed solutions