Re: [PATCHv2 11/14] gdb: allow 'set args' and run commands to contain newlines

[Eli Zaretskii <eliz@gnu.org>]

> From: Andrew Burgess <aburgess@redhat.com>
> Cc: Andrew Burgess <aburgess@redhat.com>,
> 	Eli Zaretskii <eliz@gnu.org>
> Date: Mon,  4 Nov 2024 14:45:55 +0000
> 
> When starting GDB it is possible to set an inferior argument that
> contains a newline, for example:
> 
>   shell> gdb --args my.app "abc
>   > def"
>   ...
>   (gdb) show args
>   Argument list to give program being debugged when it is started is "abc'
>   'def".
> 
> However, once GDB is started, the only way to install an argument
> containing a newline is to use the Python API.
> 
> This commit changes that.
> 
> After this commit 'set args' as well as 'run', 'start', and 'starti',
> will now accept multi-line inferior arguments, e.g.:
> 
>   (gdb) set args "abc
>   > def"
>   (gdb) show args
>   Argument list to give program being debugged when it is started is ""abc
>   def"".
> 
> And also:
> 
>   (gdb) run "abc
>   > def"
>   ... etc ...
> 
> Once GDB has presented the secondary prompt to gather the remaining
> inferior arguments then it is possible for the user to quit argument
> entry by sending SIGINT (usually, Ctrl-c), or sending EOF (usually,
> Ctrl-d).  For the 'set args' case this will abort the argument change,
> leaving the arguments as they were previously.  For the run style
> commands, this aborts the run command completely, the inferior is not
> changed, and the partially collected arguments are not installed.
> 
> Reviewed-By: Eli Zaretskii <eliz@gnu.org>
> ---
>  gdb/NEWS                                 |   8 ++
>  gdb/doc/gdb.texinfo                      |  20 ++++
>  gdb/infcmd.c                             | 140 +++++++++++++++++++++--
>  gdb/testsuite/gdb.base/inferior-args.exp |  71 +++++++++++-
>  4 files changed, 229 insertions(+), 10 deletions(-)

Apologies for my failing memory: did we discuss the need to say in the
manual that this will only work on some systems?  I think on Windows
it won't work, because Windows doesn't support command lines with
embedded newlines.