Designed to assist in troubleshooting issues
Editor: The Debug Diagnostic Tool (DebugDiag) is designed to assist in troubleshooting issues such as hangs, slow performance, memory leaks or fragmentation, and crashes in any Win32 user-mode process. The tool includes additional debugging scripts focused on Internet Information Services (IIS) applications, web data access components, COM+ and related Microsoft technologies.

DebugDiag 1.0 was released as part of the IIS Diagnostic toolkit and as a standalone tool. DebugDiag 1.1 is currently available as a standalone tool.
Overview

DebugDiag provides an extensible object model in the form of COM objects and provides a script host with a built-in reporting framework.

It is composed of the following 3 components; a debugging service, a debugger host, and the user interface.

The Debugging Service
The debugger service (DbgSvc.exe) performs the following tasks:
Attach/Detach the host to processes
Collect Performance Monitor data
Implement HTTP ping to Detect hangs
Inject Leak Monitor in running processes
Collect debugging session state information
Shows the state of each rule defined you can free download Debug Diagnostic Tool 1.1.0.401 now.