* Xdebug's basic functions include the display of stack traces on error conditions, maximum nesting level protection and time tracking. * The debug information that Xdebug can provide includes the following: - stack and function traces in error messages with: - full parameter display for user defined functions - function name, file name and line indications - support for member functions - memory allocation - protection for infinite recursions * Xdebug also provides: - profiling information for PHP scripts - code coverage analysis - Capabilities to debug your scripts interactively with a debugger front-end.

* SRB Mode Debugging - As IBM creates more and more SRB-only System Interfaces, the ability to debug them interactively becomes more and more valuable. * Cross Memory Mode Debugging - z/XDC has extensive capabilities for debugging code with the Primary, Secondary and Home address spaces all being the same, or different in any conceivable way. * Simple Control Block Maps - z/XDC provides DSECT maps for thousands of IBM control blocks. Creating DSECT maps for your own control blocks is trivially easy. * Source Listing Support - z/XDC automatically loads source image maps (from ADATA), making your code in storage as easy to read as an assembly listing. * Comprehensive Mapping - z/XDC uses ADATA, SYM data and/or ESD data (whatever's available, whatever's necessary) for creating Linkedit/Binder maps, CSECT maps, and DSECT maps to help you visualize your code, data and control blocks.