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Continue button

running any code. The Continue button resumes executing the script and continues until the natural end

of the script or a breakpoint is encountered. The last three buttons are standard Step Over, Step Into, and

Step Out commands.

All these actions can also be performed in the Interactive view by using the commands in the following

table.

Debug Button

Text Command

Stop

/stop

Continue

/cont

Step Over

/next

Step Into

/step

Step Out

/finish

When code execution is stopped on a particular line, that line is highlighted in yellow in the Source

Code view. Additionally, the function containing that line is displayed with a yellow arrow in the Call

Stack view (Figure 14-21).

Figure 14-21

The Call Stack view always has a generic

__toplevel__

item to represent the global scope from which

the first function was called.

Watches

One of the unique features of Venkman is its capability to set up variable watches. Watches literally

watch

variables for changes in their values and display them in the Watches view.

To add watches, you can select a variable in the Local Variables view, right-click, and select Add Watch

Expression. You can also use the

/watch-expr

command in the Interactive view to do the same thing:

/watch-expr variable_name

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Error Handling

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