Printing multiple variables in GDB?

Question

I am encountering a problem to print multiple variables (say 25) in a function on GDB Prompt.

Is there any convenient way to do this instead of printing every variables manually ?

can I have a script or a simpler way which can do my job ?

Answer 1

You can print multiple values using printf command in gdb.

printf "%d,%d\n", a, b

To use it in future, you can either define a gdb-function or use gdb-history feature.

1. To define a gdb-function, create/modify file $HOME/.gdbinit with the following conten,

   define print_all
       printf "%d,%d\n", a, b
   end
   document print_all
       Prints all my variables.
   end
   

   Then you can use print_all as a command.

2. For history trick, create/modify file $HOME/.gdbinit with the following content:

   set history filename ~/.gdb_history
   set history save
   

   and get it using ctrl+r same like in bash. Actual gdb-history answer is here.