CODEWITHSUNDEEP
gdb
Frank Wang
Frank Wang

Reputation: 920

How to print something without this format : $[num]=[value] in GDB environment?

What I want is this :

(gdb) define mynext
Redefine command "mynext"? (y or n) y
Type commands for definition of "mynext".
End with a line saying just "end".
>print "------"
>print Location:
>where
>print "-------------"
>print Code:
>list
>print "---------------------"
>print Next:
>next
>end

This is what outputs is:

$1 = "-----"
....

I expect:

-----
....

I used call printf("opopo") also, but It print the return value of "opopo" which is 5. Just like this:$4 = 5

My question is: how can I print something without this format which is :$[num]=[value].

Upvotes: 0

Views: 73

Answers (1)

Tom Tromey
Tom Tromey

Reputation: 22549

As you found, print puts the printed value into the value history. gdb provides two different ways to avoid this.

One is printf. This works somewhat like the C function, but is a gdb command. Use it like:

(gdb) printf "whatever you like\n"
whatever you like
(gdb)

Another is output. This is a bit like the print command, but does not enter the value into the value history.

(gdb) output 5
5(gdb)

You can see from this that output also doesn't emit a trailing newline. You would have to add that yourself.

Upvotes: 1

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