cheatsheet

Starting GDB

• gdb - Start GDB with the specified program.
• gdb - Start GDB with no program specified; you can load a program later.
• gdb -p - Attach GDB to a running process with the specified PID.

Basic Commands

• run [args] - Start the program with optional arguments.
• quit - Exit GDB.
• help - Show help for GDB commands.
• info - Display information about various types (e.g., info registers).
• list - Display source code around the current line or function.
• next - Step over to the next line of code.
• step - Step into the next function call.
• continue - Resume program execution until the next breakpoint.
• finish - Continue execution until the current function returns.

Breakpoints

• break - Set a breakpoint at the specified location (e.g., break main or break file.c:10).
• delete - Delete the breakpoint with the specified number.
• clear - Clear a breakpoint at the specified location.
• info breakpoints - List all breakpoints and their statuses.
• disable - Disable the breakpoint with the specified number.
• enable - Enable the breakpoint with the specified number.

Inspecting Variables

• print - Evaluate and display the value of an expression.
• display - Display the value of an expression each time the program stops.
• undisplay - Stop displaying the expression with the specified number.
• info locals - Display the values of local variables in the current function.
• info args - Display the values of function arguments.

Stack Frames

• backtrace - Display the call stack.
• frame - Select a stack frame by its number.
• up - Move up the call stack to the previous frame.
• down - Move down the call stack to the next frame.

Code Execution

• return - Return from the current function with the specified value.
• jump - Jump to a specified line or function.

Watchpoints

• watch - Set a watchpoint for the specified expression.
• rwatch - Set a read watchpoint for the specified expression.
• awatch - Set an access watchpoint for the specified expression.
• delete - Delete the watchpoint with the specified number.

Threads

• info threads - List all threads.
• thread - Switch to the thread with the specified number.
• thread apply all - Apply a command to all threads (e.g., thread apply all bt).

Signals

• handle - Set how GDB handles a signal (e.g., handle SIGINT nostop).
• info signals - Display the current signal handling settings.

Files

• file - Load a different executable file into GDB.
• symbol-file - Load debugging symbols from a specified file.

Scripts

• source - Execute GDB commands from a script file.

Other

• set - Set a GDB variable to a specified value.
• show - Display the value of a GDB variable.
• record - Start recording the program's execution for replay.
• restore - Restore the program's state from a previously recorded state.