Setting Action Points

This chapter explains how to use action points. TotalView supports four kinds of action points: breakpoints, barrier breakpoints, evaluation points, and watchpoints. A breakpoint stops execution of processes and threads that reach it. A barrier breakpoint holds each thread and process that reaches it until all threads and processes from the group reach it. An evaluation point causes a code fragment to execute when it is reached. A watchpoint lets you monitor a location in memory and stop execution when the value stored in memory changes.

Topics in this chapter are:

• Action Points Overview
• Setting Breakpoints and Barriers
• Defining Evaluation Points
• Using Watchpoints
• Saving Action Points to a File
• Evaluating Expressions
• Writing Code Fragments