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|
----------------------------------------------------------------------
-- Rules.Abnormal_Function_Return - Package body --
-- --
-- This software is (c) CSEE and Adalog 2004-2006. The Ada --
-- Controller is free software; you can redistribute it and/or --
-- modify it under terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2, or --
-- (at your option) any later version. This unit is distributed --
-- in the hope that it will be useful, but WITHOUT ANY WARRANTY; --
-- without even the implied warranty of MERCHANTABILITY or FITNESS --
-- FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU --
-- General Public License distributed with this program; see file --
-- COPYING. If not, write to the Free Software Foundation, 59 --
-- Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics --
-- from the units of this program, or if you link this unit with --
-- other files to produce an executable, this unit does not by --
-- itself cause the resulting executable to be covered by the GNU --
-- General Public License. This exception does not however --
-- invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- This software is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied --
-- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR --
-- PURPOSE. --
----------------------------------------------------------------------
-- Adalog
with
Thick_Queries,
Utilities;
-- Adactl
with
Framework.Language,
Framework.Rules_Manager,
Framework.Reports;
-- Asis
with
Asis.Declarations,
Asis.Elements,
Asis.Statements;
package body Rules.Abnormal_Function_Return is
use Framework;
Rule_Used : Boolean := False;
Save_Used : Boolean;
Rule_Context : Basic_Rule_Context;
----------
-- Help --
----------
procedure Help is
use Utilities;
begin
User_Message ("Rule: " & Rule_Id);
User_Message ("Parameter(s): none");
User_Message ("Control functions that can propagate Program_Error due to not executing a return statement");
end Help;
-------------
-- Add_Use --
-------------
procedure Add_Use (Label : in Wide_String;
Rule_Type : in Rule_Types) is
use Framework.Language;
begin
if Parameter_Exists then
Parameter_Error (Rule_Id, "No parameter allowed");
end if;
if Rule_Used then
Parameter_Error (Rule_Id, "this rule can be specified only once");
else
Rule_Context := Basic.New_Context (Rule_Type, Label);
Rule_Used := True;
end if;
end Add_Use;
-------------
-- Command --
-------------
procedure Command (Action : Framework.Rules_Manager.Rule_Action) is
use Framework.Rules_Manager;
begin
case Action is
when Clear =>
Rule_Used := False;
when Suspend =>
Save_Used := Rule_Used;
Rule_Used := False;
when Resume =>
Rule_Used := Save_Used;
end case;
end Command;
---------------------------
-- Process_Function_Body --
---------------------------
procedure Process_Function_Body (Function_Body : in Asis.Expression) is
use Asis.Declarations, Asis.Statements;
procedure Check (Stmt : Asis.Statement) is
use Asis, Asis.Elements;
use Framework.Reports, Thick_Queries, Utilities;
Last_Statement : Asis.Statement := Stmt;
begin
while Statement_Kind (Last_Statement) = A_Block_Statement loop
declare
Block_Stmts : constant Asis.Statement_List := Block_Statements (Last_Statement);
begin
Last_Statement := Block_Stmts (Block_Stmts'Last);
end;
end loop;
case Statement_Kind (Last_Statement) is
when A_Return_Statement
| A_Raise_Statement
=>
return;
when A_Procedure_Call_Statement =>
declare
SP_Name : constant Wide_String := To_Upper (Full_Name_Image (Called_Simple_Name (Last_Statement)));
begin
if SP_Name = "ADA.EXCEPTIONS.RAISE_EXCEPTION"
or else SP_Name = "ADA.EXCEPTIONS.RERAISE_OCCURRENCE"
then
return;
end if;
end;
when others =>
null;
end case;
Report (Rule_Id,
Rule_Context,
Get_Location (Last_Statement),
"Sequence of statements not terminated by ""return"" or ""raise""");
end Check;
begin
if not Rule_Used then
return;
end if;
Rules_Manager.Enter (Rule_Id);
declare
Body_Stmts : constant Asis.Statement_List := Body_Statements (Function_Body);
begin
Check (Body_Stmts (Body_Stmts'Last));
end;
declare
Handlers : constant Asis.Exception_Handler_List := Body_Exception_Handlers (Function_Body);
begin
for H in Handlers'Range loop
declare
Handler_Stmts : constant Asis.Statement_List := Handler_Statements (Handlers (H));
begin
Check (Handler_Stmts (Handler_Stmts'Last));
end;
end loop;
end;
end Process_Function_Body;
begin
Framework.Rules_Manager.Register_Semantic (Rule_Id,
Help => Help'Access,
Add_Use => Add_Use'Access,
Command => Command'Access);
end Rules.Abnormal_Function_Return;
|
