What Is Debug?

Set, delete, and list breakpoints in a program. The program executes until a breakpoint is reached, then stops and passes control to the user. When you set breakpoints, you can specify a list of commands that automatically are executed when the breakpoint is hit.

Single step (multiple steps) through a program.

Display and/or modify the contents of memory locations. A full set of addressing modes is offered, including absolute CM memory, code segment relative, data segment relative, S relative, Q relative, DB relative, HP Precision Architecture virtual addresses, and HP Precision Architecture real memory addresses.

Display a symbolic procedure stack trace, optionally displaying interleaved NM and CM calls. You can also set the current debug environment back temporarily to the environment which existed at any marker on the stack.

Calculate the value of expressions in order to determine the correct values of variables at a given point in a program. Values can be custom formatted in several bases.

Use new full screen displays (windows) which allow inspection of registers, program code, the current stack frame, and the top of stack. Groups of custom user windows can be aimed at important data blocks to monitor changing values dynamically.

Display online help for all commands, predefined functions, and environment variables.

Create and reference user-defined variables.

Define powerful parameterized macros. Macros can be invoked as new commands to perform useful sequences of commands, or as functions within expressions that return single values.

Define aliases for command and macro names.

Execute commands from a file, record all user input to a log file, and record all Debug output to a list file.