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GDB - List of Commands

Basic Commands

Command Short version Description
run r The run command causes execution of the program to start from the beginning
quit q Exit GDB debugger
breakpoint location b location The breakpoint command sets a breakpoint in a certain location. (line, function, etc)
print expression p expression This will print the value of the given expression.
continue c Continues execution following a breakpoint, until the next breakpoint or the termination of the program.
step s Executes a single line after a breakpoint.
next n Executes a single line. If this line is a subprogram call, executes and returns from the call.
list l Lists a few lines around the current source location.
backtrace bt Displays a backtrace of the call chain.

Execution control

Command Short version Description
run r Start program execution
run command-line-arguments r command-line-arguments Start program execution
run < stdin-file > stdout-file r < stdin-file > stdout-file Start program execution with IO redirection
continue c Continues program execution until encounters a breakpoint
kill Kills the current process
quit q Exit GDB debugger

Breakpoint management

Command Description
break function-name Set a breakpoint at specified function
break line-number Set a breakpoint at specified line number
break ClassName::functionName Set a breakpoint at specified class function
break +offset Set a breakpoint specified number of lines forward from the current position
break -offset Set a breakpoint specified number of lines back from the current position
break filename:function Set a breakpoint at specified function inside a file
break filename:line-number Set a breakpoint at specified line number of a file
break *address Set a breakpoint at specified instruction address
break line-number if condition Set a breakpoint if the condition is met
break line thread thread-number Set a breakpoint in the thread specified by the line number
tbreak Set a temporary break (break once only)
watch condition Suspend execution when the condition is met
clear Delete breakpoints
clear function Delete all breakpoints in function
clear line-number Delete breakpoints at specified line number
delete Delete all breakpoints, watchpoints, or catchpoints
delete breakpoint-number Delete the breakpoint specified
delete breakpoint-number-breakpoint-number Delete the breakpoints inside the specified range. ex: delete 1-4
disable breakpoint-number Disable the breakpoint specified
disable breakpoint-number-breakpoint-number Disable the breakpoints inside the specified range, ex: disable 1-4
enable breakpoint-number Enable the breakpoint specified
enable breakpoint-number-breakpoint-number Enable the breakpoints inside the specified range, ex: enable 1-4

Analyse stack

Command Short version Description
backtrace bt Print stack backtrace
backtrace full Print values of local variables
frame f Show current stack frame
frame number f number Show the specified frame number
up Move up a single frame
down Move down a single frame
up number Move up the specified number of frames in the stack
down number Move down the specified number of frames in the stack
info frame List address, language, address of arguments/local variables and which registers were saved in a frame.
info args Info arguments of the selected frame
info locals Info arguments of the selected local variables
info catch Info arguments of the selected exception handlers
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