Can't print in gdb

Can't print in gdb

[Olivia Nelson]

I'm trying to print with a prefix, how can I do that? I've tried to
use + or printf, none of them works:

(gdb) ptype substr
type = struct string {
    uint8 *str;
    int len;
}
(gdb) p substr
$1 = 0x111111 "xxx=0"
(gdb) printf "%s\n", substr
Value can't be converted to integer.
(gdb) p "a" + substr
A syntax error in expression, near `'.

Re: Can't print in gdb

[Andreas Schwab]

On Dez 08 2020, Olivia Nelson via Gdb wrote:

> I'm trying to print with a prefix, how can I do that? I've tried to
> use + or printf, none of them works:

You can use output to print a value without newline.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Re: Can't print in gdb

[Shahab Vahedi]

You will need either to typecast:
(gdb) printf "prefix:%s\n", (char *) substr

Or use the member variable:
(gdb) printf "prefix:%s\n", substr.str


Cheers,
Shahab