The list of debugging tools is listed below.

• AppPuncher Debugger is used for debugging Rich Internet Applications
• AQtime debugger
• CA/EZ TEST is a CICS interactive test/debug software package
• CharmDebug is a Debugger for Charm++
• CodeView debugger
• DBG is a PHP Debugger and Profiler
• dbx debugger
• Distributed Debugging Tool (Allinea DDT)
• DDTLite — Allinea DDTLite for Visual Studio 2008
• DEBUG is the built-in debugger of DOS and Microsoft Windows
• Debugger for MySQL
• Opera Dragonfly
• The dynamic debugging technique (DDT)
• Embedded System Debug Plug-in is used for Eclipse
• FusionDebug
• Debugger OpenGL, OpenGL ES, and OpenCL Debugger and Profiler. For Windows, Linux, Mac OS X, and iPhone
• GNU Debugger (GDB), GNU Binutils
• Intel Debugger (IDB)
• The system is used as circuit debugger for Embedded Systems
• Interactive Disassembler (IDA Pro)
• Java Platform Debugger Architecture source Java debugger
• LLDB
• MacsBug
• IBM Rational Purify
• TRACE32 is circuit debugger for Embedded Systems
• VB Watch Debugger — debugger for Visual Basic 6.0
• Microsoft Visual Studio Debugger
• WinDbg
• Xdebug — PHP debugger and profiler

GNU Debugger

GNU Debugger, which is also called gdb, is the most popular debugger for UNIX systems to debug C and C++ programs.

GNU Debugger helps you in getting information about the following:

• If a core dump happened, then what statement or expression did the program crash on?
• If an error occurs while executing a function, what line of the program contains the call to that function, and what are the parameters?
• What are the values of program variables at a particular point during execution of the program?
• What is the result of a particular expression in a program?

How GDB Debugs?

GDB allows you to run the program up to a certain point, then stop and print out the values of certain variables at that point, or step through the program one line at a time and print out the values of each variable after executing each line.

GDB uses a simple command line interface.