The full form of GDB is Gnu DeBugger.
GDB, or the Gnu Debugger, is a powerful tool used for debugging programs. It allows developers to inspect what's happening inside their code while it's running.
Key Features of GDB
- Code Stepping: You can execute your code line by line.
- Breakpoints: You can pause execution at specific points in the code.
- Variable Examination: You can inspect the values of variables.
- Variable Modification: You can change the values of variables.
How GDB Works
GDB operates from the command line, providing a text-based interface to control and analyze program execution. While the command-line interface can be initially daunting, it offers a high degree of control and flexibility.
Example Uses
Imagine you have a program that's crashing or producing incorrect results. GDB can help you pinpoint the source of the problem.
- Set a breakpoint: Put a breakpoint at the beginning of the function you suspect is causing issues.
- Run the program: Start the program under GDB's control. It will pause at the breakpoint.
- Step through the code: Use GDB commands to execute the code line by line and observe the values of relevant variables.
- Identify the issue: By carefully examining the program's state at each step, you can identify the exact line of code where the problem occurs.
Why Use GDB?
GDB is essential for:
- Finding and fixing bugs in your code.
- Understanding how your code executes.
- Analyzing the state of your program at different points.
