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GDB

Cheat sheet

run <prog-args…> (short “r”) : start the program
step [count] (short “s”) : step one line
stepi [count] (short “si”) : step one instruction
next [count] (short “n”) : step one line without entering in functions
continue (short “c”) : continue the program
finish (short “fin”) : execute until selected stack frame returns
advance [source-file]:<line> (short “adv”) : continue up to the given location
call <func-name> (short “ca”) : call a function (the context is copied so that it is not modified)
kill (short “k”) : stop the program

backtrace (short “bt”) : show the stack
frame <frame-number> (short “f”) : move to the stack drame number
list, list -, list [source-file]:<line|function> (short “l”) : show source code

break [source-file]:<line|function> [thread <thread-num>] [if <condition>] (short “b”) : set a breakpoint
info breakpoints (short “i b”) : show all current breakpoints
condition <breakpoint-number> <condition> (short “cond”) : specify the breakpoint to break only if condition is true
delete breakpoints <breakpoint-number> (short “del b”, “del”) : delete a breakpoint
enable/disable <breakpoint-numbers…> (short “en” and “dis”) : enable or disable some breakpoints

print <var-name> (short “p”) : print the value/content of the variable
print *<pointer>@<nelements> : print nelements of the array
print/<format> <var-name> : print with a certain format (x for hexa, …)
display <var-name> (short “disp”) : display the value/content of the variable at every step
awatch <var-name> (short “aw”) : stops the execution whenever the variable is read or written
watch <cond-on-var> (short “wa”) : stops the execution whenever the condition on the variable becomes true
ptype <var-name> : type of variable
x <addr> : print the content of memory, can format with /<format> too
set variable <var-name> = <value> : change variable value
set $variable = <exp> : create an external variable