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 ?

Possible duplicate of gdb - print multiple variables with one command — phuclv
– phuclv, Commented Nov 23, 2015 at 12:14

Community · Accepted Answer · 2017-05-23 12:02:27Z

14

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.

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.
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.

edited May 23, 2017 at 12:02

CommunityBot

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answered Jul 5, 2013 at 4:08

VoidPointer

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2 Comments

VoidPointer Over a year ago

@Jeyaram, I have no experience on different linux distros, but you can use -x option to specify command file if it is not picked from $HOME/.gdbinit. Ex.: gdb -x /path/.gdbinit /path/binary

Eric Over a year ago

It seems can't print register.

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