* breakpoint.c (clear_syscall_counts): Take struct inferior*.
* inferior.c (add_inferior_silent): Notify inferior_added
observer.
(delete_inferior_1): Notify inferior_removed observer.
(exit_inferior_1): Pass inferior, not pid, to observer.
(inferior_appeared): Likewise.
(add_inferior_with_spaces): New.
(add_inferior_command): Use the above.
* inferior.h (delete_inferior_1, add_inferior_with_spaces):
Declare.
* inflow.c (inflow_inferior_exit): Likewise.
* jit.c (jit_inferior_exit_hook): Likewise.
* mi/mi-cmds.c (mi_cmds): Register add-inferior and
remove-inferior.
* mi/mi-cmds.h (mi_cmd_add_inferior, mi_cmd_remove_inferior): New.
* mi/mi-interp.c (mi_inferior_added, mi_inferior_removed): New.
(report_initial_inferior): New.
(mi_inferior_removed): Register the above. Make sure
inferior_added observer is called on the first inferior.
(mi_new_thread, mi_thread_exit): Thread group is now identified by
inferior number, not pid.
(mi_solib_loaded, mi_solib_unloaded): Report which inferiors are
affected.
* mi/mi-main.c (current_context): New.
(proceed_thread_callback): Use typed closure.
Proceed everything if pid is 0. Most implementation split into
(proceed_thread): ... this.
(run_one_inferior): New.
(mi_cmd_exec_continue, mi_cmd_exec_interrupt, mi_cmd_exec_run):
Adjust for multiexec behaviour.
(mi_cmd_add_inferior, mi_cmd_remove_inferior): New.
(mi_cmd_execute): Handle the 'thread-group' option here.
Do some extra checks.
* mi-parse.c (mi_parse): Handle the --all and --thread-group
options.
* mi-parse.h (struct mi_parse): New fields all and thread_group.