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gdb: make add_com_alias accept target as a cmd_list_element

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The alias creation functions currently accept a name to specify the
target command.  They pass this to add_alias_cmd, which needs to lookup
the target command by name.

Given that:

 - We don't support creating an alias for a command before that command
   exists.
 - We always use add_info_alias just after creating that target command,
   and therefore have access to the target command's cmd_list_element.

... change add_com_alias to accept the target command as a
cmd_list_element (other functions are done in subsequent patches).  This
ensures we don't create the alias before the target command, because you
need to get the cmd_list_element from somewhere when you call the alias
creation function.  And it avoids an unecessary command lookup.  So it
seems better to me in every aspect.

gdb/ChangeLog:

	* command.h (add_com_alias): Accept target as
	cmd_list_element.  Update callers.

Change-Id: I24bed7da57221cc77606034de3023fedac015150
This commit is contained in:
Simon Marchi 2021-05-27 13:59:01 -04:00
parent 7bd22f56a3
commit 3947f654ea
22 changed files with 219 additions and 173 deletions
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7
gdb/objc-lang.c
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@ -1319,9 +1319,10 @@ _initialize_objc_language ()
_("All Objective-C selectors, or those matching REGEXP."));
add_info ("classes", info_classes_command,
_("All Objective-C classes, or those matching REGEXP."));
add_com ("print-object", class_vars, print_object_command,
_("Ask an Objective-C object to print itself."));
add_com_alias ("po", "print-object", class_vars, 1);
cmd_list_element *print_object_cmd
= add_com ("print-object", class_vars, print_object_command,
_("Ask an Objective-C object to print itself."));
add_com_alias ("po", print_object_cmd, class_vars, 1);
}
static void