About error handling in parallel.for

[dkprojektai 1]

Hi, made tests and finally find out how works error handling in Omnithread parallel.for. Here is my testing:

 

procedure TbtnParallelFor.btnParallelForExceptionClick(Sender: TObject);
var
  i: Integer;
  Loking_elem: TOmniMREW;
  Error_stack_text: string;
begin

  Error_stack_text:= '';

      Parallel.For(0, 10,1).Execute(
      procedure (i: integer)
      begin
        Try
          
		//What will happen if here will be error from dll???


          if i = 4 then 
          try

          finally
            integer(nil^):= 0;
          end;

          if i = 5 then
          integer(nil^):= 0;
          raise Exception.Create('Exception in thread ' +
            TThread.Current.ThreadID.ToString);
        except

          on E: Exception do begin
            Try
              if i = 5 then
              integer(nil^):= 0;
              Loking_elem.EnterWriteLock;
              Error_stack_text:= Error_stack_text + #13#10 + '---' + E.StackTrace;
              Loking_elem.ExitWriteLock;
            except
              on E: Exception do begin
                Loking_elem.EnterWriteLock;
                Error_stack_text:= Error_stack_text + #13#10 + '---' + E.StackTrace;
                Loking_elem.ExitWriteLock;
              end;
            end;
          end;
        end;
      end);


  Memo1.Lines.Text:= Error_stack_text;
end;

 

In my application (not in this example) I still getting application terminate on error and I can't cache it. I work with many dll's in commented section. I want to ask, what will happen if in there will be an error from dll? Is there any solution to cache it?

 

Fault Offset:

Faulting application name: Application.exe, version: 4.6.0.0, time stamp: 0x5d7fec1f
Faulting module name: KERNELBASE.dll, version: 6.2.9200.16384, time stamp: 0x5010ac2f
Exception code: 0xe06d7363
Fault offset: 0x00014b32
Faulting process id: 0x31c0
Faulting application start time: 0x01d56d40dd25c4a4
Faulting application path: C:\Application.exe
Faulting module path: C:\Windows\SYSTEM32\KERNELBASE.dll
Report Id: 3ff93c8d-d950-11e9-93fa-0a94ef1b475e
Faulting package full name: 
Faulting package-relative application ID: 

Leads me to:

Found:
  Provider: TELDebugInfoMap
  Location: (00C63D20){ANPR_VID.exe     } [06483D20] OtlParallel.TOmniParallelSimpleLoop.Execute[2]$ActRec.$0$Body (Line 3440, "OtlParallel.pas" + 16) + $0
    Unit: OtlParallel
    Source: OtlParallel.pas
    Class: TOmniParallelSimpleLoop.Execute[2]$ActRec
    Routine: $0$Body
    Line: 3440

    Routine offset (bytes): 96
    Routine offset (lines): 16
    Line offset (bytes): 0

That is why I think that error rises dll and parallel.for is not able to handle it. Any comments are welcome.

[Primož Gabrijelčič 223]

Sorry, until you get us a reproducible test case, I cannot tell you anything.