Delphi DLL

Using DebugLogFilePath to Debug a Crash

If a crash is suspected to occur within a Chilkat method call, it can be debugged using the VerboseLogging and DebugLogFilePath as shown here. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
crypt: HCkCrypt2;

begin
success := False;

// If a crash is suspected to occur within a Chilkat method call, it can be debugged using the VerboseLogging and DebugLogFilePath as shown here.
// 
// NOTE: The same technique applies for any Chilkat class that has the DebugLogFilePath property.
// Most Chilkat classes have DebugLogFilePath.

crypt := CkCrypt2_Create();

// First make sure VerboseLogging is turned on.
CkCrypt2_putVerboseLogging(crypt,True);

// Set the DebugLogFilePath to the path of a log file that will be created automatically.
// If the file already exists, Chilkat will append to it.
CkCrypt2_putDebugLogFilePath(crypt,'c:/someDir/debugLog.txt');

// Reproduce the problem.

// ...
success := CkCrypt2_VerifyP7M(crypt,'c:/someDir/someFile.p7m');
// ...

// If a crash occurred within Chilkat, then the debugLog.txt will contain information that
// can be sent to support@chilkatsoft.com

// ------------------------------------------------------------------------------------------------
// Note: Given that the debug log file is always appended, the log file might grow 
// to a very large size.  You can prevent the continual growth of the log file by
// deleting the log file at certain points, such as after a Chilkat method returns.
// 
// Given that we're only interested in the log file for Chilkat calls that crash or hang,
// it's OK to delete the log file after a Chilkat method that returns.
// 
// The next call to a Chilkat method will re-create the log file.  If the Chilkat call crashes
// or hangs, then you'll be left with just the log of the crash or hang.
// ------------------------------------------------------------------------------------------------

CkCrypt2_Dispose(crypt);

end;