GDB - Commands

GDB offers a big list of commands, however the following commands are the ones used most frequently:

• b main - Puts a breakpoint at the beginning of the program

• b - Puts a breakpoint at the current line

• b N - Puts a breakpoint at line N

• b +N - Puts a breakpoint N lines down from the current line

• b fn - Puts a breakpoint at the beginning of function "fn"

• d N - Deletes breakpoint number N

• info break - list breakpoints

• r - Runs the program until a breakpoint or error

• c - Continues running the program until the next breakpoint or error

• f - Runs until the current function is finished

• s - Runs the next line of the program

• s N - Runs the next N lines of the program

• n - Like s, but it does not step into functions

• u N - Runs until you get N lines in front of the current line

• p var - Prints the current value of the variable "var"

• bt - Prints a stack trace

• u - Goes up a level in the stack

• d - Goes down a level in the stack

• q - Quits gdb