Yes, lldb doesn't share a terminal with the target the way gdb does (swapping
control back and forth when the target stops & restarts.) Instead it creates
pty's for the target, and uses those. If you need to debug a command-line
program that's making use of the terminal, you should launch it in a terminal
and attach to it. On darwin, you can use the -tty option to "process launch"
to get lldb to do this for you. This may not work in an ssh session, however.
Jim
> On Dec 19, 2014, at 7:33 AM, Jay Foad <jay.f...@gmail.com> wrote:
>
> Hi,
>
> I've noticed that an inferior running in the same terminal as lldb
> doesn't seem to be able to get the terminal size with TIOCGWINSZ. Is
> this expected? I don't have the same problem with gdb.
>
> Test case is below, running on Darwin 14 over an SSH connection.
>
> Thanks,
> Jay.
>
>
> $ cat winsz.c
> #include <stdio.h>
> #include <sys/ioctl.h>
> #include <termios.h>
> #include <unistd.h>
>
> int main() {
> struct winsize size;
> int tty = isatty(0);
> int ret = ioctl(0, TIOCGWINSZ, &size);
> printf("tty %d ret %d row %d col %d\n", tty, ret, size.ws_row, size.ws_col);
> }
> $ clang -o winsz winsz.c
> $ ./winsz
> tty 1 ret 0 row 24 col 80
> $ lldb winsz
> (lldb) target create "winsz"
> Current executable set to 'winsz' (x86_64).
> (lldb) run
> Process 43730 launched: '/Users/jay/winsz' (x86_64)
> tty 1 ret 0 row 0 col 0
> Process 43730 exited with status = 0 (0x00000000)
> (lldb)
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