debug2

Debug2 is a command-line utility found on some Unix-like operating systems, often used for low-level debugging of programs. It is a successor to the original `debug` command and provides more advanced features for inspecting and manipulating program execution. Debug2 allows users to set breakpoints, step through code line by line, examine memory contents, and modify register values. Its primary function is to assist developers in identifying and resolving bugs by providing a controlled environment to observe a program's behavior.

The interface of Debug2 is typically interactive, presenting a prompt where users can enter commands. These commands can be used to load a program, start its execution, control its flow, and query its state. Debug2 is particularly useful for understanding complex issues that might not be easily revealed by higher-level debugging tools or by simply examining source code. It operates at a more fundamental level, interacting directly with the machine's instructions and memory.

While powerful, Debug2 can have a steep learning curve due to its low-level nature and command-line interface. It requires a good understanding of assembly language and computer architecture to be used effectively. Despite this, for certain types of deep system debugging or when working with embedded systems, Debug2 remains a valuable tool in a developer's arsenal. Its presence is less common on modern Linux distributions compared to tools like GDB, but it can still be found on some specialized systems or older versions of Unix.