Re: MI handshaking

[Jim Ingham <jingham@apple.com>]

On Jan 4, 2005, at 5:53 PM, Bob Rossi wrote:

> On Tue, Jan 04, 2005 at 05:50:41PM -0800, Jim Ingham wrote:
>>
>> On Jan 4, 2005, at 5:36 PM, Bob Rossi wrote:
>>
>>>>
>>>> I've been very busy, so sorry about the delay.
>>>>
>>>> I'll look into what we discussed here and come up with something 
>>>> that
>>>> fits all the new needs. Does Jim care about any of this?
>>
>> I didn't see this question in the original note.  The answer is we
>> always ship the Developer Tools as a whole package, which includes
>> Xcode & gdb, and just ask for the mi version we know it supports
>> explicitly.  We don't support taking one version of gdb & using it
>> under an older or newer version of Xcode.  I don't see any plans for 
>> us
>> to separate the two in the forseeable future.  So while I do care 
>> about
>> this in an abstract sort of way, I can't see us using it.
>>
>>
>>>
>>> Sorry about the delay.
>>>
>>> I plan on getting at least this patch into GDB. So, to recap, I neede
>>> to add
>>> a new mi-command that would output all of the info discovered during
>>> the
>>> handshaking phase. Is there anything else that needs to be added?
>>>
>>
>> Xcode does use the "does this command exist" mi command Jason 
>> mentioned
>> in a few places.  This was more for the convenience of the Xcode
>> developers - so they could ask me to implement a command, then sketch
>> out the implementation right away without having to wait for me to
>> implement it.  That is the level of handshaking that we do.
>
> Thanks for the info, that sounds usefull. Is it available?

It's in the Darwin repository - you can get this by CVS or in tarball 
form or on the web.

http://developer.apple.com/darwin/projects/darwin/

is a good place to start.

It's a trivial command (we call it mi-verify-command):

enum mi_cmd_result
mi_cmd_mi_verify_command (char *command, char **argv, int argc)
{
   char 		*command_name = argv[0];
   struct mi_cmd *cmd;

   if (argc != 1)
     {
       error ("mi_cmd_mi_verify_command: Usage: MI_COMMAND_NAME.");
     }

   cmd = mi_lookup (command_name);

   ui_out_field_string (uiout, "name", command_name);
   if (cmd != NULL)
     {
        ui_out_field_string (uiout, "defined", "true");
        ui_out_field_string (uiout, "implemented",
             ((cmd->cli != NULL) ||
              (cmd->argv_func != NULL) ||
              (cmd->args_func != NULL)) ? "true" : "false");
     }
   else
     {
        ui_out_field_string (uiout, "defined", "false");
     }

   return MI_CMD_DONE;
}

Jim

>
> Thanks,
> Bob Rossi