6.1: Starting DDD

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The ddd debugger is started with the executable file. The program must be assembled and linked with the correct options (as noted in the previous chapter). For example, using the previous sample program, example, the command would be:

ddd example

Upon starting DDD/GDB, something similar to the screen, shown below, should be displayed (with the appropriate source code displayed).

截屏2021-07-19 下午1.19.06.png
Illustration 9: Initial Debugger Screen

If the code is not displayed in a similar manner as shown above, the assemble and link steps should be verified. Specifically, the -g qualifier must be included in both the assemble and link steps.

Built in help is available by clicking on the Help menu item (upper right-hand corner). The DDD and GDB manuals are available from the virtual library link on the class web page. To exit DDD/GDB, select File \(\to\) Exit (from the top menu bar).

Some additional DDD/GDB configuration settings suggestions include:

Edit \(\to\) Preferences \(\to\) General \(\to\) Suppress X Warning

Edit \(\to\) Preferences \(\to\) Source \(\to\) Display Source Line Numbers

These are not required, but can make using the debugger easier. If set, the options will be saved and remembered for successive uses of the debugger (on the same machine).