The Wiert Corner – irregular stream of stuff

Reminder to self: when you get Unknown function at TMethodImplementationIntercept in a Delphi stack trace from the Exception.StackTrace property or FastMM memory report:

1. Ensure you generate a .MAP or .TDS file with full debug information
2. Copy the .MAP or .TDS files to directory of your EXE.

Via:

• [WayBack] 0006512: jcl-2.7.0.5676/Delphi XE7: StackTrackExample not working – Project JEDI – Issue Tracker
• [WayBack] Problem using portable viewer

The Exception.StackTrace was introduced in Delphi 2009 that extended these [WayBack] Exception Members:

• [WayBack] Exception.StackTrace Property serviced by this method:
  • [WayBack] Exception.GetStackTrace Method
• [WayBack] Exception.StackInfo Property filled by this method:
  • [WayBack] Exception.SetStackInfo Method
• [WayBack] Exception.BaseException Property (recursively Self or the innermost InnerException)
• [WayBack] Exception.InnerException Property
  • freed by [WayBack] Exception.Destroy Destructor
• [WayBack] Exception.RaisingException Method
• [WayBack] Exception.SetInnerException Method
• [WayBack] Exception.ToString Method

Some notes:

• Fields where you can put hooks in; if there is no hook in place, they won’t be used:
  • [WayBack] Exception.GetExceptionStackInfoProc Field GetExceptionStackInfoProc: function (P: PExceptionRecord): Pointer;
    • This function is called to return an opaque data structure that contains stack information for the given exception information record. This function will be called when the exception is about to be raised or if this is an external exception such as an Access Violation, called soon after the object is created.
  • [WayBack] Exception.CleanUpStackInfoProc Field CleanUpStackInfoProc: procedure (Info: Pointer);
    • This function is called when the destructor is called to clean up any data associated with the given opaque data structure.
  • [WayBack] Exception.GetStackInfoStringProc Field GetStackInfoStringProc: function (Info: Pointer): string;
    • This function is called to return a string representation of the opaque data structure returned by GetExceptionStackInfoProc

TMethodImplementationIntercept was introduced in the System.Rtti unit of Delphi XE6 [WayBack]:

• [WayBack] Delphi XE6 DLL: Unwanted export: TMethodImplementationIntercept – Stack Overflow

–jeroen

Example code: