Re: [RFA] Implement -thread-info.

[Nick Roberts <nickrob@snap.net.nz>]

 > > mi_info_threads is nearly the same function as thread_command.  
 > 
 > You probably meant info_threads_command?

Yes.

 > > Can this be 
 > > used in a dual way just as -break-list uses breakpoint_1?
 > 
 > I don't know -- I actually have no idea what magic makes breakpoint_1 to
 > work both for MI and CLI. Do you happen to know?

It just seems to be a kind of overloading where the output format of
functions like ui_out_field_string depends on the interpreter used (value
of uiout).  In cases where only one interpreter outputs anything
ui_out_is_mi_like_p is used.

 > > Also Denis Pilat has already proposed a patch for -thread-info:
 > > http://sourceware.org/ml/gdb-patches/2007-03/msg00167.html
 > 
 > I did not notice that.
 > 
 > > 
 > > How does your patch compare?  (assuming the problem of return type is solved
 > > as has been done for thread_select).
 > 
 > It appears that my patch:
 > 
 > 1. Does not bother with making non-throwing function, as MI top-level can
 > handle exceptions.
 > 
 > 2. Allows to print information about all threads.

I see.  Denis also proposed something for -thread-list-all-threads
(http://sourceware.org/ml/gdb-patches/2007-03/msg00144.html)

Do you not want to print the frame level?  Also do you want to
catch errors in print_stack_frame?  Rather than:

+      print_stack_frame (get_selected_frame (NULL), 0, LOCATION);

Would it be better to use:

+      print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0);

?

Note that with MI (following the thread with Denis) that the address gets
printed anyway when print_stack_frame is used:

  args.print_what = ui_out_is_mi_like_p (uiout) ? LOC_AND_ADDRESS : print_what;

 > I don't know what problem of return type you refer to -- can you clarify?

That, in Denis' patch, gdb_thread_info returns type enum gdb_rc but
catch_exceptions_with_msg returns type int.  (just like gdb_breakpoint and
break_command_really did for a while).

-- 
Nick                                           http://www.inet.net.nz/~nickrob