1809 lines
62 KiB
Ada
1809 lines
62 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT COMPILER COMPONENTS --
|
|
-- --
|
|
-- R T S F I N D --
|
|
-- --
|
|
-- B o d y --
|
|
-- --
|
|
-- Copyright (C) 1992-2020, Free Software Foundation, Inc. --
|
|
-- --
|
|
-- GNAT is free software; you can redistribute it and/or modify it under --
|
|
-- terms of the GNU General Public License as published by the Free Soft- --
|
|
-- ware Foundation; either version 3, or (at your option) any later ver- --
|
|
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
|
|
-- OUT 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 GNAT; see file COPYING3. If not, go to --
|
|
-- http://www.gnu.org/licenses for a complete copy of the license. --
|
|
-- --
|
|
-- GNAT was originally developed by the GNAT team at New York University. --
|
|
-- Extensive contributions were provided by Ada Core Technologies Inc. --
|
|
-- --
|
|
------------------------------------------------------------------------------
|
|
|
|
with Atree; use Atree;
|
|
with Casing; use Casing;
|
|
with Csets; use Csets;
|
|
with Debug; use Debug;
|
|
with Einfo; use Einfo;
|
|
with Elists; use Elists;
|
|
with Errout; use Errout;
|
|
with Exp_Dist;
|
|
with Fname; use Fname;
|
|
with Fname.UF; use Fname.UF;
|
|
with Ghost; use Ghost;
|
|
with Lib; use Lib;
|
|
with Lib.Load; use Lib.Load;
|
|
with Namet; use Namet;
|
|
with Nlists; use Nlists;
|
|
with Nmake; use Nmake;
|
|
with Output; use Output;
|
|
with Opt; use Opt;
|
|
with Restrict; use Restrict;
|
|
with Sem; use Sem;
|
|
with Sem_Aux; use Sem_Aux;
|
|
with Sem_Ch7; use Sem_Ch7;
|
|
with Sem_Dist; use Sem_Dist;
|
|
with Sem_Util; use Sem_Util;
|
|
with Sinfo; use Sinfo;
|
|
with Stand; use Stand;
|
|
with Snames; use Snames;
|
|
with Tbuild; use Tbuild;
|
|
with Uname; use Uname;
|
|
|
|
package body Rtsfind is
|
|
|
|
RTE_Available_Call : Boolean := False;
|
|
-- Set True during call to RTE from RTE_Available (or from call to
|
|
-- RTE_Record_Component from RTE_Record_Component_Available). Tells
|
|
-- the called subprogram to set RTE_Is_Available to False rather than
|
|
-- generating an error message.
|
|
|
|
RTE_Is_Available : Boolean;
|
|
-- Set True by RTE_Available on entry. When RTE_Available_Call is set
|
|
-- True, set False if RTE would otherwise generate an error message.
|
|
|
|
----------------
|
|
-- Unit table --
|
|
----------------
|
|
|
|
-- The unit table has one entry for each unit included in the definition
|
|
-- of the type RTU_Id in the spec. The table entries are initialized in
|
|
-- Initialize to set the Entity field to Empty, indicating that the
|
|
-- corresponding unit has not yet been loaded. The fields are set when
|
|
-- a unit is loaded to contain the defining entity for the unit, the
|
|
-- unit name, and the unit number.
|
|
|
|
-- Note that a unit can be loaded either by a call to find an entity
|
|
-- within the unit (e.g. RTE), or by an explicit with of the unit. In
|
|
-- the latter case it is critical to make a call to Set_RTU_Loaded to
|
|
-- ensure that the entry in this table reflects the load.
|
|
|
|
-- A unit retrieved through rtsfind may end up in the context of several
|
|
-- other units, in addition to the main unit. These additional with_clauses
|
|
-- are needed to generate a proper traversal order for CodePeer. To
|
|
-- minimize somewhat the redundancy created by numerous calls to rtsfind
|
|
-- from different units, we keep track of the list of implicit with_clauses
|
|
-- already created for the current loaded unit.
|
|
|
|
type RT_Unit_Table_Record is record
|
|
Entity : Entity_Id;
|
|
Uname : Unit_Name_Type;
|
|
First_Implicit_With : Node_Id;
|
|
Unum : Unit_Number_Type;
|
|
end record;
|
|
|
|
RT_Unit_Table : array (RTU_Id) of RT_Unit_Table_Record;
|
|
|
|
--------------------------
|
|
-- Runtime Entity Table --
|
|
--------------------------
|
|
|
|
-- There is one entry in the runtime entity table for each entity that is
|
|
-- included in the definition of the RE_Id type in the spec. The entries
|
|
-- are set by Initialize_Rtsfind to contain Empty, indicating that the
|
|
-- entity has not yet been located. Once the entity is located for the
|
|
-- first time, its ID is stored in this array, so that subsequent calls
|
|
-- for the same entity can be satisfied immediately.
|
|
|
|
-- NOTE: In order to avoid conflicts between record components and subprgs
|
|
-- that have the same name (i.e. subprogram External_Tag and
|
|
-- component External_Tag of package Ada.Tags) this table is not used
|
|
-- with Record_Components.
|
|
|
|
RE_Table : array (RE_Id) of Entity_Id;
|
|
|
|
--------------------------------
|
|
-- Generation of with_clauses --
|
|
--------------------------------
|
|
|
|
-- When a unit is implicitly loaded as a result of a call to RTE, it is
|
|
-- necessary to create one or two implicit with_clauses. We add such
|
|
-- with_clauses to the extended main unit if needed, and also to whatever
|
|
-- unit needs them, which is not necessarily the main unit. The former
|
|
-- ensures that the object is correctly loaded by the binder. The latter
|
|
-- is necessary for CodePeer.
|
|
|
|
-- The field First_Implicit_With in the unit table record are used to
|
|
-- avoid creating duplicate with_clauses.
|
|
|
|
----------------------------------------------
|
|
-- Table of Predefined RE_Id Error Messages --
|
|
----------------------------------------------
|
|
|
|
-- If an attempt is made to load an entity, given an RE_Id value, and the
|
|
-- entity is not available in the current configuration, an error message
|
|
-- is given (see Entity_Not_Defined below). The general form of such an
|
|
-- error message is for example:
|
|
|
|
-- entity "System.Pack_43.Bits_43" not defined
|
|
|
|
-- The following table defines a set of RE_Id image values for which this
|
|
-- error message is specialized and replaced by specific text indicating
|
|
-- the exact message to be output. For example, in the case above, for the
|
|
-- RE_Id value RE_Bits_43, we do indeed specialize the message, and the
|
|
-- above generic message is replaced by:
|
|
|
|
-- packed component size of 43 is not supported
|
|
|
|
type CString_Ptr is access constant String;
|
|
|
|
type PRE_Id_Entry is record
|
|
Str : CString_Ptr;
|
|
-- Pointer to string with the RE_Id image. The sequence ?? may appear
|
|
-- in which case it will match any characters in the RE_Id image value.
|
|
-- This is used to avoid the need for dozens of entries for RE_Bits_??.
|
|
|
|
Msg : CString_Ptr;
|
|
-- Pointer to string with the corresponding error text. The sequence
|
|
-- ?? may appear, in which case, it is replaced by the corresponding
|
|
-- sequence ?? in the Str value (if the first ? is zero, then it is
|
|
-- omitted from the message).
|
|
end record;
|
|
|
|
Str1 : aliased constant String := "RE_BITS_??";
|
|
Str2 : aliased constant String := "RE_GET_??";
|
|
Str3 : aliased constant String := "RE_SET_??";
|
|
Str4 : aliased constant String := "RE_CALL_SIMPLE";
|
|
|
|
MsgPack : aliased constant String :=
|
|
"packed component size of ?? is not supported";
|
|
MsgRV : aliased constant String :=
|
|
"task rendezvous is not supported";
|
|
|
|
PRE_Id_Table : constant array (Natural range <>) of PRE_Id_Entry :=
|
|
(1 => (Str1'Access, MsgPack'Access),
|
|
2 => (Str2'Access, MsgPack'Access),
|
|
3 => (Str3'Access, MsgPack'Access),
|
|
4 => (Str4'Access, MsgRV'Access));
|
|
-- We will add entries to this table as we find cases where it is a good
|
|
-- idea to do so. By no means all the RE_Id values need entries, because
|
|
-- the expander often gives clear messages before it makes the Rtsfind
|
|
-- call expecting to find the entity.
|
|
|
|
-----------------------
|
|
-- Local Subprograms --
|
|
-----------------------
|
|
|
|
function Check_CRT (E : RE_Id; Eid : Entity_Id) return Entity_Id;
|
|
-- Check entity Eid to ensure that configurable run-time restrictions are
|
|
-- met. May generate an error message (if RTE_Available_Call is false) and
|
|
-- raise RE_Not_Available if entity E does not exist (e.g. Eid is Empty).
|
|
-- Also check that entity is not overloaded.
|
|
|
|
procedure Entity_Not_Defined (Id : RE_Id);
|
|
-- Outputs error messages for an entity that is not defined in the run-time
|
|
-- library (the form of the error message is tailored for no run time or
|
|
-- configurable run time mode as required). See also table of pre-defined
|
|
-- messages for entities above (RE_Id_Messages).
|
|
|
|
function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type;
|
|
-- Retrieves the Unit Name given a unit id represented by its enumeration
|
|
-- value in RTU_Id.
|
|
|
|
procedure Load_Fail (S : String; U_Id : RTU_Id; Id : RE_Id);
|
|
pragma No_Return (Load_Fail);
|
|
-- Internal procedure called if we can't successfully locate or process a
|
|
-- run-time unit. The parameters give information about the error message
|
|
-- to be given. S is a reason for failing to compile the file and U_Id is
|
|
-- the unit id. RE_Id is the RE_Id originally passed to RTE. The message in
|
|
-- S is one of the following:
|
|
--
|
|
-- "not found"
|
|
-- "had parser errors"
|
|
-- "had semantic errors"
|
|
--
|
|
-- The "not found" case is treated specially in that it is considered
|
|
-- a normal situation in configurable run-time mode, and generates
|
|
-- a warning, but is otherwise ignored.
|
|
|
|
procedure Load_RTU
|
|
(U_Id : RTU_Id;
|
|
Id : RE_Id := RE_Null;
|
|
Use_Setting : Boolean := False);
|
|
-- Load the unit whose Id is given if not already loaded. The unit is
|
|
-- loaded and analyzed, and the entry in RT_Unit_Table is updated to
|
|
-- reflect the load. Use_Setting is used to indicate the initial setting
|
|
-- for the Is_Potentially_Use_Visible flag of the entity for the loaded
|
|
-- unit (if it is indeed loaded). A value of False means nothing special
|
|
-- need be done. A value of True indicates that this flag must be set to
|
|
-- True. It is needed only in the Check_Text_IO_Special_Unit procedure,
|
|
-- which may materialize an entity of Text_IO (or [Wide_]Wide_Text_IO) that
|
|
-- was previously unknown. Id is the RE_Id value of the entity which was
|
|
-- originally requested. Id is used only for error message detail, and if
|
|
-- it is RE_Null, then the attempt to output the entity name is ignored.
|
|
|
|
function Make_Unit_Name
|
|
(U : RT_Unit_Table_Record;
|
|
N : Node_Id) return Node_Id;
|
|
-- If the unit is a child unit, build fully qualified name for use in
|
|
-- With_Clause.
|
|
|
|
procedure Maybe_Add_With (U : in out RT_Unit_Table_Record);
|
|
-- If necessary, add an implicit with_clause from the current unit to the
|
|
-- one represented by U.
|
|
|
|
procedure Output_Entity_Name (Id : RE_Id; Msg : String);
|
|
-- Output continuation error message giving qualified name of entity
|
|
-- corresponding to Id, appending the string given by Msg.
|
|
|
|
function RE_Chars (E : RE_Id) return Name_Id;
|
|
-- Given a RE_Id value returns the Chars of the corresponding entity
|
|
|
|
procedure RTE_Error_Msg (Msg : String);
|
|
-- Generates a message by calling Error_Msg_N specifying Current_Error_Node
|
|
-- as the node location using the given Msg text. Special processing in the
|
|
-- case where RTE_Available_Call is set. In this case, no message is output
|
|
-- and instead RTE_Is_Available is set to False. Note that this can only be
|
|
-- used if you are sure that the message comes directly or indirectly from
|
|
-- a call to the RTE function.
|
|
|
|
---------------
|
|
-- Check_CRT --
|
|
---------------
|
|
|
|
function Check_CRT (E : RE_Id; Eid : Entity_Id) return Entity_Id is
|
|
U_Id : constant RTU_Id := RE_Unit_Table (E);
|
|
|
|
begin
|
|
if No (Eid) then
|
|
if RTE_Available_Call then
|
|
RTE_Is_Available := False;
|
|
else
|
|
Entity_Not_Defined (E);
|
|
end if;
|
|
|
|
raise RE_Not_Available;
|
|
|
|
-- Entity is available
|
|
|
|
else
|
|
-- If in No_Run_Time mode and entity is neither in the current unit
|
|
-- nor in one of the specially permitted units, raise the exception.
|
|
|
|
if No_Run_Time_Mode
|
|
and then not OK_No_Run_Time_Unit (U_Id)
|
|
|
|
-- If the entity being referenced is defined in the current scope,
|
|
-- using it is always fine as such usage can never introduce any
|
|
-- dependency on an additional unit. The presence of this test
|
|
-- helps generating meaningful error messages for CRT violations.
|
|
|
|
and then Scope (Eid) /= Current_Scope
|
|
then
|
|
Entity_Not_Defined (E);
|
|
raise RE_Not_Available;
|
|
end if;
|
|
|
|
-- Check entity is not overloaded, checking for special exceptions
|
|
|
|
if Has_Homonym (Eid)
|
|
and then E /= RE_Save_Occurrence
|
|
then
|
|
Set_Standard_Error;
|
|
Write_Str ("Run-time configuration error (");
|
|
Write_Str ("rtsfind entity """);
|
|
Get_Decoded_Name_String (Chars (Eid));
|
|
Set_Casing (Mixed_Case);
|
|
Write_Str (Name_Buffer (1 .. Name_Len));
|
|
Write_Str (""" is overloaded)");
|
|
Write_Eol;
|
|
raise Unrecoverable_Error;
|
|
end if;
|
|
|
|
-- Otherwise entity is accessible
|
|
|
|
return Eid;
|
|
end if;
|
|
end Check_CRT;
|
|
|
|
--------------------------------
|
|
-- Check_Text_IO_Special_Unit --
|
|
--------------------------------
|
|
|
|
procedure Check_Text_IO_Special_Unit (Nam : Node_Id) is
|
|
Chrs : Name_Id;
|
|
|
|
type Name_Map_Type is array (Text_IO_Package_Name) of RTU_Id;
|
|
|
|
Name_Map : constant Name_Map_Type := Name_Map_Type'(
|
|
Name_Decimal_IO => Ada_Text_IO_Decimal_IO,
|
|
Name_Enumeration_IO => Ada_Text_IO_Enumeration_IO,
|
|
Name_Fixed_IO => Ada_Text_IO_Fixed_IO,
|
|
Name_Float_IO => Ada_Text_IO_Float_IO,
|
|
Name_Integer_IO => Ada_Text_IO_Integer_IO,
|
|
Name_Modular_IO => Ada_Text_IO_Modular_IO);
|
|
|
|
Wide_Name_Map : constant Name_Map_Type := Name_Map_Type'(
|
|
Name_Decimal_IO => Ada_Wide_Text_IO_Decimal_IO,
|
|
Name_Enumeration_IO => Ada_Wide_Text_IO_Enumeration_IO,
|
|
Name_Fixed_IO => Ada_Wide_Text_IO_Fixed_IO,
|
|
Name_Float_IO => Ada_Wide_Text_IO_Float_IO,
|
|
Name_Integer_IO => Ada_Wide_Text_IO_Integer_IO,
|
|
Name_Modular_IO => Ada_Wide_Text_IO_Modular_IO);
|
|
|
|
Wide_Wide_Name_Map : constant Name_Map_Type := Name_Map_Type'(
|
|
Name_Decimal_IO => Ada_Wide_Wide_Text_IO_Decimal_IO,
|
|
Name_Enumeration_IO => Ada_Wide_Wide_Text_IO_Enumeration_IO,
|
|
Name_Fixed_IO => Ada_Wide_Wide_Text_IO_Fixed_IO,
|
|
Name_Float_IO => Ada_Wide_Wide_Text_IO_Float_IO,
|
|
Name_Integer_IO => Ada_Wide_Wide_Text_IO_Integer_IO,
|
|
Name_Modular_IO => Ada_Wide_Wide_Text_IO_Modular_IO);
|
|
|
|
To_Load : RTU_Id;
|
|
-- Unit to be loaded, from one of the above maps
|
|
|
|
begin
|
|
-- Nothing to do if name is not an identifier or a selected component
|
|
-- whose selector_name is an identifier.
|
|
|
|
if Nkind (Nam) = N_Identifier then
|
|
Chrs := Chars (Nam);
|
|
|
|
elsif Nkind (Nam) = N_Selected_Component
|
|
and then Nkind (Selector_Name (Nam)) = N_Identifier
|
|
then
|
|
Chrs := Chars (Selector_Name (Nam));
|
|
|
|
else
|
|
return;
|
|
end if;
|
|
|
|
-- Nothing to do if name is not one of the Text_IO subpackages
|
|
-- Otherwise look through loaded units, and if we find Text_IO
|
|
-- or [Wide_]Wide_Text_IO already loaded, then load the proper child.
|
|
|
|
if Chrs in Text_IO_Package_Name then
|
|
for U in Main_Unit .. Last_Unit loop
|
|
Get_Name_String (Unit_File_Name (U));
|
|
|
|
if Name_Len = 12 then
|
|
|
|
-- Here is where we do the loads if we find one of the units
|
|
-- Ada.Text_IO or Ada.[Wide_]Wide_Text_IO. An interesting
|
|
-- detail is that these units may already be used (i.e. their
|
|
-- In_Use flags may be set). Normally when the In_Use flag is
|
|
-- set, the Is_Potentially_Use_Visible flag of all entities in
|
|
-- the package is set, but the new entity we are mysteriously
|
|
-- adding was not there to have its flag set at the time. So
|
|
-- that's why we pass the extra parameter to RTU_Find, to make
|
|
-- sure the flag does get set now. Given that those generic
|
|
-- packages are in fact child units, we must indicate that
|
|
-- they are visible.
|
|
|
|
if Name_Buffer (1 .. 12) = "a-textio.ads" then
|
|
To_Load := Name_Map (Chrs);
|
|
|
|
elsif Name_Buffer (1 .. 12) = "a-witeio.ads" then
|
|
To_Load := Wide_Name_Map (Chrs);
|
|
|
|
elsif Name_Buffer (1 .. 12) = "a-ztexio.ads" then
|
|
To_Load := Wide_Wide_Name_Map (Chrs);
|
|
|
|
else
|
|
goto Continue;
|
|
end if;
|
|
|
|
Load_RTU (To_Load, Use_Setting => In_Use (Cunit_Entity (U)));
|
|
Set_Is_Visible_Lib_Unit (RT_Unit_Table (To_Load).Entity);
|
|
|
|
-- Prevent creation of an implicit 'with' from (for example)
|
|
-- Ada.Wide_Text_IO.Integer_IO to Ada.Text_IO.Integer_IO,
|
|
-- because these could create cycles. First check whether the
|
|
-- simple names match ("integer_io" = "integer_io"), and then
|
|
-- check whether the parent is indeed one of the
|
|
-- [[Wide_]Wide_]Text_IO packages.
|
|
|
|
if Chrs = Chars (Cunit_Entity (Current_Sem_Unit)) then
|
|
declare
|
|
Parent_Name : constant Unit_Name_Type :=
|
|
Get_Parent_Spec_Name
|
|
(Unit_Name (Current_Sem_Unit));
|
|
|
|
begin
|
|
if Present (Parent_Name) then
|
|
Get_Name_String (Parent_Name);
|
|
|
|
declare
|
|
P : String renames Name_Buffer (1 .. Name_Len);
|
|
begin
|
|
if P = "ada.text_io%s" or else
|
|
P = "ada.wide_text_io%s" or else
|
|
P = "ada.wide_wide_text_io%s"
|
|
then
|
|
goto Continue;
|
|
end if;
|
|
end;
|
|
end if;
|
|
end;
|
|
end if;
|
|
|
|
-- Add an implicit with clause from the current unit to the
|
|
-- [[Wide_]Wide_]Text_IO child (if necessary).
|
|
|
|
Maybe_Add_With (RT_Unit_Table (To_Load));
|
|
end if;
|
|
|
|
<<Continue>> null;
|
|
end loop;
|
|
end if;
|
|
|
|
exception
|
|
-- Generate error message if run-time unit not available
|
|
|
|
when RE_Not_Available =>
|
|
Error_Msg_N ("& not available", Nam);
|
|
end Check_Text_IO_Special_Unit;
|
|
|
|
------------------------
|
|
-- Entity_Not_Defined --
|
|
------------------------
|
|
|
|
procedure Entity_Not_Defined (Id : RE_Id) is
|
|
begin
|
|
if No_Run_Time_Mode then
|
|
|
|
-- If the error occurs when compiling the body of a predefined
|
|
-- unit for inlining purposes, the body must be illegal in this
|
|
-- mode, and there is no point in continuing.
|
|
|
|
if In_Predefined_Unit (Current_Error_Node) then
|
|
Error_Msg_N
|
|
("construct not allowed in no run time mode!",
|
|
Current_Error_Node);
|
|
raise Unrecoverable_Error;
|
|
|
|
else
|
|
RTE_Error_Msg ("|construct not allowed in no run time mode");
|
|
end if;
|
|
|
|
elsif Configurable_Run_Time_Mode then
|
|
RTE_Error_Msg ("|construct not allowed in this configuration>");
|
|
else
|
|
RTE_Error_Msg ("run-time configuration error");
|
|
end if;
|
|
|
|
-- See if this entry is to be found in the PRE_Id table that provides
|
|
-- specialized messages for some RE_Id values.
|
|
|
|
for J in PRE_Id_Table'Range loop
|
|
declare
|
|
TStr : constant String := PRE_Id_Table (J).Str.all;
|
|
RStr : constant String := RE_Id'Image (Id);
|
|
TMsg : String := PRE_Id_Table (J).Msg.all;
|
|
LMsg : Natural := TMsg'Length;
|
|
|
|
begin
|
|
if TStr'Length = RStr'Length then
|
|
for J in TStr'Range loop
|
|
if TStr (J) /= RStr (J) and then TStr (J) /= '?' then
|
|
goto Continue;
|
|
end if;
|
|
end loop;
|
|
|
|
for J in TMsg'First .. TMsg'Last - 1 loop
|
|
if TMsg (J) = '?' then
|
|
for K in 1 .. TStr'Last loop
|
|
if TStr (K) = '?' then
|
|
if RStr (K) = '0' then
|
|
TMsg (J) := RStr (K + 1);
|
|
TMsg (J + 1 .. LMsg - 1) := TMsg (J + 2 .. LMsg);
|
|
LMsg := LMsg - 1;
|
|
else
|
|
TMsg (J .. J + 1) := RStr (K .. K + 1);
|
|
end if;
|
|
|
|
exit;
|
|
end if;
|
|
end loop;
|
|
end if;
|
|
end loop;
|
|
|
|
RTE_Error_Msg (TMsg (1 .. LMsg));
|
|
return;
|
|
end if;
|
|
end;
|
|
|
|
<<Continue>> null;
|
|
end loop;
|
|
|
|
-- We did not find an entry in the table, so output the generic entity
|
|
-- not found message, where the name of the entity corresponds to the
|
|
-- given RE_Id value.
|
|
|
|
Output_Entity_Name (Id, "not defined");
|
|
end Entity_Not_Defined;
|
|
|
|
-------------------
|
|
-- Get_Unit_Name --
|
|
-------------------
|
|
|
|
-- The following subtypes include all the proper descendants of each unit
|
|
-- that has such descendants. For example, Ada_Calendar_Descendant includes
|
|
-- all the descendents of Ada.Calendar (except Ada.Calendar itself). These
|
|
-- are used by Get_Unit_Name to know where to change "_" to ".", and by
|
|
-- Is_Text_IO_Special_Package to detect the special generic pseudo-children
|
|
-- of [[Wide_]Wide_]Text_IO.
|
|
|
|
subtype Ada_Descendant is RTU_Id
|
|
range Ada_Calendar .. Ada_Wide_Wide_Text_IO_Modular_IO;
|
|
|
|
subtype Ada_Calendar_Descendant is Ada_Descendant
|
|
range Ada_Calendar_Delays .. Ada_Calendar_Delays;
|
|
|
|
subtype Ada_Dispatching_Descendant is Ada_Descendant
|
|
range Ada_Dispatching_EDF .. Ada_Dispatching_EDF;
|
|
|
|
subtype Ada_Interrupts_Descendant is Ada_Descendant range
|
|
Ada_Interrupts_Names .. Ada_Interrupts_Names;
|
|
|
|
subtype Ada_Numerics_Descendant is Ada_Descendant
|
|
range Ada_Numerics_Generic_Elementary_Functions ..
|
|
Ada_Numerics_Generic_Elementary_Functions;
|
|
|
|
subtype Ada_Real_Time_Descendant is Ada_Descendant
|
|
range Ada_Real_Time_Delays .. Ada_Real_Time_Timing_Events;
|
|
|
|
subtype Ada_Streams_Descendant is Ada_Descendant
|
|
range Ada_Streams_Stream_IO .. Ada_Streams_Stream_IO;
|
|
|
|
subtype Ada_Strings_Descendant is Ada_Descendant
|
|
range Ada_Strings_Superbounded .. Ada_Strings_Text_Output_Buffers;
|
|
|
|
subtype Ada_Strings_Text_Output_Descendant is Ada_Strings_Descendant
|
|
range Ada_Strings_Text_Output_Utils .. Ada_Strings_Text_Output_Buffers;
|
|
|
|
subtype Ada_Text_IO_Descendant is Ada_Descendant
|
|
range Ada_Text_IO_Decimal_IO .. Ada_Text_IO_Modular_IO;
|
|
|
|
subtype Ada_Wide_Text_IO_Descendant is Ada_Descendant
|
|
range Ada_Wide_Text_IO_Decimal_IO .. Ada_Wide_Text_IO_Modular_IO;
|
|
|
|
subtype Ada_Wide_Wide_Text_IO_Descendant is Ada_Descendant
|
|
range Ada_Wide_Wide_Text_IO_Decimal_IO ..
|
|
Ada_Wide_Wide_Text_IO_Modular_IO;
|
|
|
|
subtype CUDA_Descendant is RTU_Id
|
|
range CUDA_Driver_Types .. CUDA_Vector_Types;
|
|
|
|
subtype Interfaces_Descendant is RTU_Id
|
|
range Interfaces_C .. Interfaces_C_Strings;
|
|
|
|
subtype Interfaces_C_Descendant is Interfaces_Descendant
|
|
range Interfaces_C_Strings .. Interfaces_C_Strings;
|
|
|
|
subtype System_Descendant is RTU_Id
|
|
range System_Address_Image .. System_Tasking_Stages;
|
|
|
|
subtype System_Dim_Descendant is System_Descendant
|
|
range System_Dim_Float_IO .. System_Dim_Integer_IO;
|
|
|
|
subtype System_Multiprocessors_Descendant is System_Descendant
|
|
range System_Multiprocessors_Dispatching_Domains ..
|
|
System_Multiprocessors_Dispatching_Domains;
|
|
|
|
subtype System_Storage_Pools_Descendant is System_Descendant
|
|
range System_Storage_Pools_Subpools .. System_Storage_Pools_Subpools;
|
|
|
|
subtype System_Strings_Descendant is System_Descendant
|
|
range System_Strings_Stream_Ops .. System_Strings_Stream_Ops;
|
|
|
|
subtype System_Tasking_Descendant is System_Descendant
|
|
range System_Tasking_Async_Delays .. System_Tasking_Stages;
|
|
|
|
subtype System_Tasking_Protected_Objects_Descendant is
|
|
System_Tasking_Descendant
|
|
range System_Tasking_Protected_Objects_Entries ..
|
|
System_Tasking_Protected_Objects_Single_Entry;
|
|
|
|
subtype System_Tasking_Restricted_Descendant is System_Tasking_Descendant
|
|
range System_Tasking_Restricted_Stages ..
|
|
System_Tasking_Restricted_Stages;
|
|
|
|
subtype System_Tasking_Async_Delays_Descendant is System_Tasking_Descendant
|
|
range System_Tasking_Async_Delays_Enqueue_Calendar ..
|
|
System_Tasking_Async_Delays_Enqueue_RT;
|
|
|
|
function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type is
|
|
Uname_Chars : constant String := RTU_Id'Image (U_Id);
|
|
begin
|
|
Name_Len := Uname_Chars'Length;
|
|
Name_Buffer (1 .. Name_Len) := Uname_Chars;
|
|
Set_Casing (All_Lower_Case);
|
|
|
|
if U_Id in Ada_Descendant then
|
|
Name_Buffer (4) := '.';
|
|
|
|
if U_Id in Ada_Calendar_Descendant then
|
|
Name_Buffer (13) := '.';
|
|
|
|
elsif U_Id in Ada_Dispatching_Descendant then
|
|
Name_Buffer (16) := '.';
|
|
|
|
elsif U_Id in Ada_Interrupts_Descendant then
|
|
Name_Buffer (15) := '.';
|
|
|
|
elsif U_Id in Ada_Numerics_Descendant then
|
|
Name_Buffer (13) := '.';
|
|
|
|
elsif U_Id in Ada_Real_Time_Descendant then
|
|
Name_Buffer (14) := '.';
|
|
|
|
elsif U_Id in Ada_Streams_Descendant then
|
|
Name_Buffer (12) := '.';
|
|
|
|
elsif U_Id in Ada_Strings_Descendant then
|
|
Name_Buffer (12) := '.';
|
|
|
|
if U_Id in Ada_Strings_Text_Output_Descendant then
|
|
Name_Buffer (24) := '.';
|
|
end if;
|
|
|
|
elsif U_Id in Ada_Text_IO_Descendant then
|
|
Name_Buffer (12) := '.';
|
|
|
|
elsif U_Id in Ada_Wide_Text_IO_Descendant then
|
|
Name_Buffer (17) := '.';
|
|
|
|
elsif U_Id in Ada_Wide_Wide_Text_IO_Descendant then
|
|
Name_Buffer (22) := '.';
|
|
end if;
|
|
|
|
elsif U_Id in CUDA_Descendant then
|
|
Name_Buffer (5) := '.';
|
|
|
|
elsif U_Id in Interfaces_Descendant then
|
|
Name_Buffer (11) := '.';
|
|
|
|
if U_Id in Interfaces_C_Descendant then
|
|
Name_Buffer (13) := '.';
|
|
end if;
|
|
|
|
elsif U_Id in System_Descendant then
|
|
Name_Buffer (7) := '.';
|
|
|
|
if U_Id in System_Dim_Descendant then
|
|
Name_Buffer (11) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Multiprocessors_Descendant then
|
|
Name_Buffer (23) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Storage_Pools_Descendant then
|
|
Name_Buffer (21) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Strings_Descendant then
|
|
Name_Buffer (15) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Tasking_Descendant then
|
|
Name_Buffer (15) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Tasking_Restricted_Descendant then
|
|
Name_Buffer (26) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Tasking_Protected_Objects_Descendant then
|
|
Name_Buffer (33) := '.';
|
|
end if;
|
|
|
|
if U_Id in System_Tasking_Async_Delays_Descendant then
|
|
Name_Buffer (28) := '.';
|
|
end if;
|
|
end if;
|
|
|
|
-- Add %s at end for spec
|
|
|
|
Name_Buffer (Name_Len + 1) := '%';
|
|
Name_Buffer (Name_Len + 2) := 's';
|
|
Name_Len := Name_Len + 2;
|
|
|
|
return Name_Find;
|
|
end Get_Unit_Name;
|
|
|
|
----------------
|
|
-- Initialize --
|
|
----------------
|
|
|
|
procedure Initialize is
|
|
begin
|
|
-- Initialize the unit table
|
|
|
|
for J in RTU_Id loop
|
|
RT_Unit_Table (J).Entity := Empty;
|
|
RT_Unit_Table (J).First_Implicit_With := Empty;
|
|
end loop;
|
|
|
|
for J in RE_Id loop
|
|
RE_Table (J) := Empty;
|
|
end loop;
|
|
|
|
RTE_Is_Available := False;
|
|
end Initialize;
|
|
|
|
------------
|
|
-- Is_RTE --
|
|
------------
|
|
|
|
function Is_RTE (Ent : Entity_Id; E : RE_Id) return Boolean is
|
|
E_Unit_Name : Unit_Name_Type;
|
|
Ent_Unit_Name : Unit_Name_Type;
|
|
|
|
S : Entity_Id;
|
|
E1 : Entity_Id;
|
|
E2 : Entity_Id;
|
|
|
|
begin
|
|
if No (Ent) then
|
|
return False;
|
|
|
|
-- If E has already a corresponding entity, check it directly,
|
|
-- going to full views if they exist to deal with the incomplete
|
|
-- and private type cases properly.
|
|
|
|
elsif Present (RE_Table (E)) then
|
|
E1 := Ent;
|
|
|
|
if Is_Type (E1) and then Present (Full_View (E1)) then
|
|
E1 := Full_View (E1);
|
|
end if;
|
|
|
|
E2 := RE_Table (E);
|
|
|
|
if Is_Type (E2) and then Present (Full_View (E2)) then
|
|
E2 := Full_View (E2);
|
|
end if;
|
|
|
|
return E1 = E2;
|
|
end if;
|
|
|
|
-- If the unit containing E is not loaded, we already know that the
|
|
-- entity we have cannot have come from this unit.
|
|
|
|
E_Unit_Name := Get_Unit_Name (RE_Unit_Table (E));
|
|
|
|
if not Is_Loaded (E_Unit_Name) then
|
|
return False;
|
|
end if;
|
|
|
|
-- Here the unit containing the entity is loaded. We have not made
|
|
-- an explicit call to RTE to get the entity in question, but we may
|
|
-- have obtained a reference to it indirectly from some other entity
|
|
-- in the same unit, or some other unit that references it.
|
|
|
|
-- Get the defining unit of the entity
|
|
|
|
S := Scope (Ent);
|
|
|
|
if No (S) or else Ekind (S) /= E_Package then
|
|
return False;
|
|
end if;
|
|
|
|
Ent_Unit_Name := Get_Unit_Name (Unit_Declaration_Node (S));
|
|
|
|
-- If the defining unit of the entity we are testing is not the
|
|
-- unit containing E, then they cannot possibly match.
|
|
|
|
if Ent_Unit_Name /= E_Unit_Name then
|
|
return False;
|
|
end if;
|
|
|
|
-- If the units match, then compare the names (remember that no
|
|
-- overloading is permitted in entities fetched using Rtsfind).
|
|
|
|
if RE_Chars (E) = Chars (Ent) then
|
|
RE_Table (E) := Ent;
|
|
|
|
-- If front-end inlining is enabled, we may be within a body that
|
|
-- contains inlined functions, which has not been retrieved through
|
|
-- rtsfind, and therefore is not yet recorded in the RT_Unit_Table.
|
|
-- Add the unit information now, it must be fully available.
|
|
|
|
declare
|
|
U : RT_Unit_Table_Record
|
|
renames RT_Unit_Table (RE_Unit_Table (E));
|
|
begin
|
|
if No (U.Entity) then
|
|
U.Entity := S;
|
|
U.Uname := E_Unit_Name;
|
|
U.Unum := Get_Source_Unit (S);
|
|
end if;
|
|
end;
|
|
|
|
return True;
|
|
else
|
|
return False;
|
|
end if;
|
|
end Is_RTE;
|
|
|
|
------------
|
|
-- Is_RTU --
|
|
------------
|
|
|
|
function Is_RTU (Ent : Entity_Id; U : RTU_Id) return Boolean is
|
|
E : constant Entity_Id := RT_Unit_Table (U).Entity;
|
|
begin
|
|
return Present (E) and then E = Ent;
|
|
end Is_RTU;
|
|
|
|
--------------------------------
|
|
-- Is_Text_IO_Special_Package --
|
|
--------------------------------
|
|
|
|
function Is_Text_IO_Special_Package (E : Entity_Id) return Boolean is
|
|
begin
|
|
pragma Assert (Is_Package_Or_Generic_Package (E));
|
|
|
|
-- ??? detection with a scope climbing might be more efficient
|
|
|
|
for U in Ada_Text_IO_Descendant loop
|
|
if Is_RTU (E, U) then
|
|
return True;
|
|
end if;
|
|
end loop;
|
|
|
|
for U in Ada_Wide_Text_IO_Descendant loop
|
|
if Is_RTU (E, U) then
|
|
return True;
|
|
end if;
|
|
end loop;
|
|
|
|
for U in Ada_Wide_Wide_Text_IO_Descendant loop
|
|
if Is_RTU (E, U) then
|
|
return True;
|
|
end if;
|
|
end loop;
|
|
|
|
return False;
|
|
end Is_Text_IO_Special_Package;
|
|
|
|
-----------------------------
|
|
-- Is_Text_IO_Special_Unit --
|
|
-----------------------------
|
|
|
|
function Is_Text_IO_Special_Unit (Nam : Node_Id) return Boolean is
|
|
Prf : Node_Id;
|
|
Sel : Node_Id;
|
|
|
|
begin
|
|
if Nkind (Nam) /= N_Expanded_Name then
|
|
return False;
|
|
end if;
|
|
|
|
Prf := Prefix (Nam);
|
|
Sel := Selector_Name (Nam);
|
|
|
|
if Nkind (Sel) /= N_Expanded_Name
|
|
or else Nkind (Prf) /= N_Identifier
|
|
or else Chars (Prf) /= Name_Ada
|
|
then
|
|
return False;
|
|
end if;
|
|
|
|
Prf := Prefix (Sel);
|
|
Sel := Selector_Name (Sel);
|
|
|
|
return
|
|
Nkind (Prf) = N_Identifier
|
|
and then
|
|
Chars (Prf) in Name_Text_IO
|
|
| Name_Wide_Text_IO
|
|
| Name_Wide_Wide_Text_IO
|
|
and then Nkind (Sel) = N_Identifier
|
|
and then Chars (Sel) in Text_IO_Package_Name;
|
|
end Is_Text_IO_Special_Unit;
|
|
|
|
---------------
|
|
-- Load_Fail --
|
|
---------------
|
|
|
|
procedure Load_Fail (S : String; U_Id : RTU_Id; Id : RE_Id) is
|
|
M : String (1 .. 100);
|
|
P : Natural := 0;
|
|
|
|
begin
|
|
-- Output header message
|
|
|
|
if Configurable_Run_Time_Mode then
|
|
RTE_Error_Msg ("construct not allowed in configurable run-time mode");
|
|
else
|
|
RTE_Error_Msg ("run-time library configuration error");
|
|
end if;
|
|
|
|
-- Output file name and reason string
|
|
|
|
M (1 .. 6) := "\file ";
|
|
P := 6;
|
|
|
|
Get_Name_String
|
|
(Get_File_Name (RT_Unit_Table (U_Id).Uname, Subunit => False));
|
|
M (P + 1 .. P + Name_Len) := Name_Buffer (1 .. Name_Len);
|
|
P := P + Name_Len;
|
|
|
|
M (P + 1) := ' ';
|
|
P := P + 1;
|
|
|
|
M (P + 1 .. P + S'Length) := S;
|
|
P := P + S'Length;
|
|
|
|
RTE_Error_Msg (M (1 .. P));
|
|
|
|
-- Output entity name
|
|
|
|
Output_Entity_Name (Id, "not available");
|
|
|
|
-- In configurable run time mode, we raise RE_Not_Available, and the
|
|
-- caller is expected to deal gracefully with this. In the case of a
|
|
-- call to RTE_Available, this exception will be caught in Rtsfind,
|
|
-- and result in a returned value of False for the call.
|
|
|
|
if Configurable_Run_Time_Mode then
|
|
raise RE_Not_Available;
|
|
|
|
-- Here we have a load failure in normal full run time mode. See if we
|
|
-- are in the context of an RTE_Available call. If so, we just raise
|
|
-- RE_Not_Available. This can happen if a unit is unavailable, which
|
|
-- happens for example in the VM case, where the run-time is not
|
|
-- complete, but we do not regard it as a configurable run-time.
|
|
-- If the caller has done an explicit call to RTE_Available, then
|
|
-- clearly the caller is prepared to deal with a result of False.
|
|
|
|
elsif RTE_Available_Call then
|
|
RTE_Is_Available := False;
|
|
raise RE_Not_Available;
|
|
|
|
-- If we are not in the context of an RTE_Available call, we are really
|
|
-- trying to load an entity that is not there, and that should never
|
|
-- happen, so in this case we signal a fatal error.
|
|
|
|
else
|
|
raise Unrecoverable_Error;
|
|
end if;
|
|
end Load_Fail;
|
|
|
|
--------------
|
|
-- Load_RTU --
|
|
--------------
|
|
|
|
-- WARNING: This routine manages Ghost and SPARK regions. Return statements
|
|
-- must be replaced by gotos which jump to the end of the routine in order
|
|
-- to restore the Ghost and SPARK modes.
|
|
|
|
procedure Load_RTU
|
|
(U_Id : RTU_Id;
|
|
Id : RE_Id := RE_Null;
|
|
Use_Setting : Boolean := False)
|
|
is
|
|
U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
|
|
Priv_Par : constant Elist_Id := New_Elmt_List;
|
|
Lib_Unit : Node_Id;
|
|
|
|
procedure Save_Private_Visibility;
|
|
-- If the current unit is the body of child unit or the spec of a
|
|
-- private child unit, the private declarations of the parent(s) are
|
|
-- visible. If the unit to be loaded is another public sibling, its
|
|
-- compilation will affect the visibility of the common ancestors.
|
|
-- Indicate those that must be restored.
|
|
|
|
procedure Restore_Private_Visibility;
|
|
-- Restore the visibility of ancestors after compiling RTU
|
|
|
|
--------------------------------
|
|
-- Restore_Private_Visibility --
|
|
--------------------------------
|
|
|
|
procedure Restore_Private_Visibility is
|
|
E_Par : Elmt_Id;
|
|
|
|
begin
|
|
E_Par := First_Elmt (Priv_Par);
|
|
while Present (E_Par) loop
|
|
if not In_Private_Part (Node (E_Par)) then
|
|
Install_Private_Declarations (Node (E_Par));
|
|
end if;
|
|
|
|
Next_Elmt (E_Par);
|
|
end loop;
|
|
end Restore_Private_Visibility;
|
|
|
|
-----------------------------
|
|
-- Save_Private_Visibility --
|
|
-----------------------------
|
|
|
|
procedure Save_Private_Visibility is
|
|
Par : Entity_Id;
|
|
|
|
begin
|
|
Par := Scope (Current_Scope);
|
|
while Present (Par)
|
|
and then Par /= Standard_Standard
|
|
loop
|
|
if Ekind (Par) = E_Package
|
|
and then Is_Compilation_Unit (Par)
|
|
and then In_Private_Part (Par)
|
|
then
|
|
Append_Elmt (Par, Priv_Par);
|
|
end if;
|
|
|
|
Par := Scope (Par);
|
|
end loop;
|
|
end Save_Private_Visibility;
|
|
|
|
-- Local variables
|
|
|
|
Saved_GM : constant Ghost_Mode_Type := Ghost_Mode;
|
|
Saved_IGR : constant Node_Id := Ignored_Ghost_Region;
|
|
Saved_ISMP : constant Boolean :=
|
|
Ignore_SPARK_Mode_Pragmas_In_Instance;
|
|
Saved_SM : constant SPARK_Mode_Type := SPARK_Mode;
|
|
Saved_SMP : constant Node_Id := SPARK_Mode_Pragma;
|
|
-- Save Ghost and SPARK mode-related data to restore on exit
|
|
|
|
-- Start of processing for Load_RTU
|
|
|
|
begin
|
|
-- Nothing to do if unit is already loaded
|
|
|
|
if Present (U.Entity) then
|
|
return;
|
|
end if;
|
|
|
|
-- Provide a clean environment for the unit
|
|
|
|
Ignore_SPARK_Mode_Pragmas_In_Instance := False;
|
|
Install_Ghost_Region (None, Empty);
|
|
Install_SPARK_Mode (None, Empty);
|
|
|
|
-- Otherwise we need to load the unit, First build unit name from the
|
|
-- enumeration literal name in type RTU_Id.
|
|
|
|
U.Uname := Get_Unit_Name (U_Id);
|
|
U.First_Implicit_With := Empty;
|
|
|
|
-- Now do the load call, note that setting Error_Node to Empty is a
|
|
-- signal to Load_Unit that we will regard a failure to find the file as
|
|
-- a fatal error, and that it should not output any kind of diagnostics,
|
|
-- since we will take care of it here.
|
|
|
|
-- We save style checking switches and turn off style checking for
|
|
-- loading the unit, since we don't want any style checking.
|
|
|
|
declare
|
|
Save_Style_Check : constant Boolean := Style_Check;
|
|
begin
|
|
Style_Check := False;
|
|
U.Unum :=
|
|
Load_Unit
|
|
(Load_Name => U.Uname,
|
|
Required => False,
|
|
Subunit => False,
|
|
Error_Node => Empty);
|
|
Style_Check := Save_Style_Check;
|
|
end;
|
|
|
|
-- Check for bad unit load
|
|
|
|
if U.Unum = No_Unit then
|
|
Load_Fail ("not found", U_Id, Id);
|
|
elsif Fatal_Error (U.Unum) = Error_Detected then
|
|
Load_Fail ("had parser errors", U_Id, Id);
|
|
end if;
|
|
|
|
-- Make sure that the unit is analyzed
|
|
|
|
declare
|
|
Was_Analyzed : constant Boolean :=
|
|
Analyzed (Cunit (Current_Sem_Unit));
|
|
|
|
begin
|
|
-- Pretend that the current unit is analyzed, in case it is System
|
|
-- or some such. This allows us to put some declarations, such as
|
|
-- exceptions and packed arrays of Boolean, into System even though
|
|
-- expanding them requires System...
|
|
|
|
-- This is a bit odd but works fine. If the RTS unit does not depend
|
|
-- in any way on the current unit, then it never gets back into the
|
|
-- current unit's tree, and the change we make to the current unit
|
|
-- tree is never noticed by anyone (it is undone in a moment). That
|
|
-- is the normal situation.
|
|
|
|
-- If the RTS Unit *does* depend on the current unit, for instance,
|
|
-- when you are compiling System, then you had better have finished
|
|
-- analyzing the part of System that is depended on before you try to
|
|
-- load the RTS Unit. This means having the code in System ordered in
|
|
-- an appropriate manner.
|
|
|
|
Set_Analyzed (Cunit (Current_Sem_Unit), True);
|
|
|
|
if not Analyzed (Cunit (U.Unum)) then
|
|
|
|
-- If the unit is already loaded through a limited_with_clause,
|
|
-- the relevant entities must already be available. We do not
|
|
-- want to load and analyze the unit because this would create
|
|
-- a real semantic dependence when the purpose of the limited_with
|
|
-- is precisely to avoid such.
|
|
|
|
if From_Limited_With (Cunit_Entity (U.Unum)) then
|
|
null;
|
|
|
|
else
|
|
Save_Private_Visibility;
|
|
Semantics (Cunit (U.Unum));
|
|
Restore_Private_Visibility;
|
|
|
|
if Fatal_Error (U.Unum) = Error_Detected then
|
|
Load_Fail ("had semantic errors", U_Id, Id);
|
|
end if;
|
|
end if;
|
|
end if;
|
|
|
|
-- Undo the pretence
|
|
|
|
Set_Analyzed (Cunit (Current_Sem_Unit), Was_Analyzed);
|
|
end;
|
|
|
|
Lib_Unit := Unit (Cunit (U.Unum));
|
|
U.Entity := Defining_Entity (Lib_Unit);
|
|
|
|
if Use_Setting then
|
|
Set_Is_Potentially_Use_Visible (U.Entity, True);
|
|
end if;
|
|
|
|
Ignore_SPARK_Mode_Pragmas_In_Instance := Saved_ISMP;
|
|
Restore_Ghost_Region (Saved_GM, Saved_IGR);
|
|
Restore_SPARK_Mode (Saved_SM, Saved_SMP);
|
|
end Load_RTU;
|
|
|
|
--------------------
|
|
-- Make_Unit_Name --
|
|
--------------------
|
|
|
|
function Make_Unit_Name
|
|
(U : RT_Unit_Table_Record;
|
|
N : Node_Id) return Node_Id is
|
|
|
|
Nam : Node_Id;
|
|
Scop : Entity_Id;
|
|
|
|
begin
|
|
Nam := New_Occurrence_Of (U.Entity, Standard_Location);
|
|
Scop := Scope (U.Entity);
|
|
|
|
if Nkind (N) = N_Defining_Program_Unit_Name then
|
|
while Scop /= Standard_Standard loop
|
|
Nam :=
|
|
Make_Expanded_Name (Standard_Location,
|
|
Chars => Chars (U.Entity),
|
|
Prefix => New_Occurrence_Of (Scop, Standard_Location),
|
|
Selector_Name => Nam);
|
|
Set_Entity (Nam, U.Entity);
|
|
|
|
Scop := Scope (Scop);
|
|
end loop;
|
|
end if;
|
|
|
|
return Nam;
|
|
end Make_Unit_Name;
|
|
|
|
--------------------
|
|
-- Maybe_Add_With --
|
|
--------------------
|
|
|
|
procedure Maybe_Add_With (U : in out RT_Unit_Table_Record) is
|
|
begin
|
|
-- We do not need to generate a with_clause for a call issued from
|
|
-- RTE_Component_Available. However, for CodePeer, we need these
|
|
-- additional with's, because for a sequence like "if RTE_Available (X)
|
|
-- then ... RTE (X)" the RTE call fails to create some necessary with's.
|
|
|
|
if RTE_Available_Call and not Generate_SCIL then
|
|
return;
|
|
end if;
|
|
|
|
-- Avoid creating directly self-referential with clauses
|
|
|
|
if Current_Sem_Unit = U.Unum then
|
|
return;
|
|
end if;
|
|
|
|
-- Add the with_clause, if we have not already added an implicit with
|
|
-- for this unit to the current compilation unit.
|
|
|
|
declare
|
|
LibUnit : constant Node_Id := Unit (Cunit (U.Unum));
|
|
Clause : Node_Id;
|
|
Withn : Node_Id;
|
|
|
|
begin
|
|
Clause := U.First_Implicit_With;
|
|
while Present (Clause) loop
|
|
if Parent (Clause) = Cunit (Current_Sem_Unit) then
|
|
return;
|
|
end if;
|
|
|
|
Clause := Next_Implicit_With (Clause);
|
|
end loop;
|
|
|
|
Withn :=
|
|
Make_With_Clause (Standard_Location,
|
|
Name =>
|
|
Make_Unit_Name
|
|
(U, Defining_Unit_Name (Specification (LibUnit))));
|
|
|
|
Set_Corresponding_Spec (Withn, U.Entity);
|
|
Set_First_Name (Withn);
|
|
Set_Implicit_With (Withn);
|
|
Set_Library_Unit (Withn, Cunit (U.Unum));
|
|
Set_Next_Implicit_With (Withn, U.First_Implicit_With);
|
|
|
|
U.First_Implicit_With := Withn;
|
|
|
|
Mark_Rewrite_Insertion (Withn);
|
|
Append (Withn, Context_Items (Cunit (Current_Sem_Unit)));
|
|
Check_Restriction_No_Dependence (Name (Withn), Current_Error_Node);
|
|
end;
|
|
end Maybe_Add_With;
|
|
|
|
------------------------
|
|
-- Output_Entity_Name --
|
|
------------------------
|
|
|
|
procedure Output_Entity_Name (Id : RE_Id; Msg : String) is
|
|
M : String (1 .. 2048);
|
|
P : Natural := 0;
|
|
-- M (1 .. P) is current message to be output
|
|
|
|
RE_Image : constant String := RE_Id'Image (Id);
|
|
S : Natural;
|
|
-- RE_Image (S .. RE_Image'Last) is the name of the entity without the
|
|
-- "RE_" or "RO_XX_" prefix.
|
|
|
|
begin
|
|
if Id = RE_Null then
|
|
return;
|
|
end if;
|
|
|
|
M (1 .. 9) := "\entity """;
|
|
P := 9;
|
|
|
|
-- Add unit name to message, excluding %s or %b at end
|
|
|
|
Get_Name_String (Get_Unit_Name (RE_Unit_Table (Id)));
|
|
Name_Len := Name_Len - 2;
|
|
Set_Casing (Mixed_Case);
|
|
M (P + 1 .. P + Name_Len) := Name_Buffer (1 .. Name_Len);
|
|
P := P + Name_Len;
|
|
|
|
-- Add a qualifying period
|
|
|
|
M (P + 1) := '.';
|
|
P := P + 1;
|
|
|
|
-- Strip "RE"
|
|
|
|
if RE_Image (2) = 'E' then
|
|
S := 4;
|
|
|
|
-- Strip "RO_XX"
|
|
|
|
else
|
|
S := 7;
|
|
end if;
|
|
|
|
-- Add entity name and closing quote to message
|
|
|
|
Name_Len := RE_Image'Length - S + 1;
|
|
Name_Buffer (1 .. Name_Len) := RE_Image (S .. RE_Image'Last);
|
|
Set_Casing (Mixed_Case);
|
|
M (P + 1 .. P + Name_Len) := Name_Buffer (1 .. Name_Len);
|
|
P := P + Name_Len;
|
|
M (P + 1) := '"';
|
|
P := P + 1;
|
|
|
|
-- Add message
|
|
|
|
M (P + 1) := ' ';
|
|
P := P + 1;
|
|
M (P + 1 .. P + Msg'Length) := Msg;
|
|
P := P + Msg'Length;
|
|
|
|
-- Output message at current error node location
|
|
|
|
RTE_Error_Msg (M (1 .. P));
|
|
end Output_Entity_Name;
|
|
|
|
--------------
|
|
-- RE_Chars --
|
|
--------------
|
|
|
|
function RE_Chars (E : RE_Id) return Name_Id is
|
|
RE_Name_Chars : constant String := RE_Id'Image (E);
|
|
|
|
begin
|
|
-- Copy name skipping initial RE_ or RO_XX characters
|
|
|
|
if RE_Name_Chars (1 .. 2) = "RE" then
|
|
for J in 4 .. RE_Name_Chars'Last loop
|
|
Name_Buffer (J - 3) := Fold_Lower (RE_Name_Chars (J));
|
|
end loop;
|
|
|
|
Name_Len := RE_Name_Chars'Length - 3;
|
|
|
|
else
|
|
for J in 7 .. RE_Name_Chars'Last loop
|
|
Name_Buffer (J - 6) := Fold_Lower (RE_Name_Chars (J));
|
|
end loop;
|
|
|
|
Name_Len := RE_Name_Chars'Length - 6;
|
|
end if;
|
|
|
|
return Name_Find;
|
|
end RE_Chars;
|
|
|
|
---------
|
|
-- RTE --
|
|
---------
|
|
|
|
function RTE (E : RE_Id) return Entity_Id is
|
|
procedure Check_RPC;
|
|
-- Reject programs that make use of distribution features not supported
|
|
-- on the current target. Also check that the PCS is compatible with the
|
|
-- code generator version. On such targets (Vxworks, others?) we provide
|
|
-- a minimal body for System.Rpc that only supplies an implementation of
|
|
-- Partition_Id.
|
|
|
|
function Find_Local_Entity (E : RE_Id) return Entity_Id;
|
|
-- This function is used when entity E is in this compilation's main
|
|
-- unit. It gets the value from the already compiled declaration.
|
|
|
|
---------------
|
|
-- Check_RPC --
|
|
---------------
|
|
|
|
procedure Check_RPC is
|
|
begin
|
|
-- Bypass this check if debug flag -gnatdR set
|
|
|
|
if Debug_Flag_RR then
|
|
return;
|
|
end if;
|
|
|
|
-- Otherwise we need the check if we are going after one of the
|
|
-- critical entities in System.RPC / System.Partition_Interface.
|
|
|
|
if E = RE_Do_Rpc
|
|
or else
|
|
E = RE_Do_Apc
|
|
or else
|
|
E = RE_Params_Stream_Type
|
|
or else
|
|
E = RE_Request_Access
|
|
then
|
|
-- If generating RCI stubs, check that we have a real PCS
|
|
|
|
if (Distribution_Stub_Mode = Generate_Receiver_Stub_Body
|
|
or else
|
|
Distribution_Stub_Mode = Generate_Caller_Stub_Body)
|
|
and then Get_PCS_Name = Name_No_DSA
|
|
then
|
|
Set_Standard_Error;
|
|
Write_Str ("distribution feature not supported");
|
|
Write_Eol;
|
|
raise Unrecoverable_Error;
|
|
|
|
-- In all cases, check Exp_Dist and System.Partition_Interface
|
|
-- consistency.
|
|
|
|
elsif Get_PCS_Version /=
|
|
Exp_Dist.PCS_Version_Number (Get_PCS_Name)
|
|
then
|
|
Set_Standard_Error;
|
|
Write_Str ("PCS version mismatch: expander ");
|
|
Write_Int (Exp_Dist.PCS_Version_Number (Get_PCS_Name));
|
|
Write_Str (", PCS (");
|
|
Write_Name (Get_PCS_Name);
|
|
Write_Str (") ");
|
|
Write_Int (Get_PCS_Version);
|
|
Write_Eol;
|
|
raise Unrecoverable_Error;
|
|
end if;
|
|
end if;
|
|
end Check_RPC;
|
|
|
|
-----------------------
|
|
-- Find_Local_Entity --
|
|
-----------------------
|
|
|
|
function Find_Local_Entity (E : RE_Id) return Entity_Id is
|
|
RE_Str : constant String := RE_Id'Image (E);
|
|
Nam : Name_Id;
|
|
Ent : Entity_Id;
|
|
|
|
Save_Nam : constant String := Name_Buffer (1 .. Name_Len);
|
|
-- Save name buffer and length over call
|
|
|
|
begin
|
|
Name_Len := Natural'Max (0, RE_Str'Length - 3);
|
|
Name_Buffer (1 .. Name_Len) :=
|
|
RE_Str (RE_Str'First + 3 .. RE_Str'Last);
|
|
|
|
Nam := Name_Find;
|
|
Ent := Entity_Id (Get_Name_Table_Int (Nam));
|
|
|
|
Name_Len := Save_Nam'Length;
|
|
Name_Buffer (1 .. Name_Len) := Save_Nam;
|
|
|
|
return Ent;
|
|
end Find_Local_Entity;
|
|
|
|
-- Local variables
|
|
|
|
U_Id : constant RTU_Id := RE_Unit_Table (E);
|
|
U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
|
|
|
|
Ename : Name_Id;
|
|
Lib_Unit : Node_Id;
|
|
Pkg_Ent : Entity_Id;
|
|
|
|
Save_Front_End_Inlining : constant Boolean := Front_End_Inlining;
|
|
-- This flag is used to disable front-end inlining when RTE is invoked.
|
|
-- This prevents the analysis of other runtime bodies when a particular
|
|
-- spec is loaded through Rtsfind. This is both efficient, and prevents
|
|
-- spurious visibility conflicts between use-visible user entities, and
|
|
-- entities in run-time packages.
|
|
|
|
-- Start of processing for RTE
|
|
|
|
begin
|
|
-- Doing a rtsfind in system.ads is special, as we cannot do this
|
|
-- when compiling System itself. So if we are compiling system then
|
|
-- we should already have acquired and processed the declaration
|
|
-- of the entity. The test is to see if this compilation's main unit
|
|
-- is System. If so, return the value from the already compiled
|
|
-- declaration and otherwise do a regular find.
|
|
|
|
-- Not pleasant, but these kinds of annoying recursion scenarios when
|
|
-- writing an Ada compiler in Ada have to be broken somewhere.
|
|
|
|
if Present (Main_Unit_Entity)
|
|
and then Chars (Main_Unit_Entity) = Name_System
|
|
and then Analyzed (Main_Unit_Entity)
|
|
and then not Is_Child_Unit (Main_Unit_Entity)
|
|
then
|
|
return Check_CRT (E, Find_Local_Entity (E));
|
|
end if;
|
|
|
|
Front_End_Inlining := False;
|
|
|
|
-- Load unit if unit not previously loaded
|
|
|
|
if No (RE_Table (E)) then
|
|
Load_RTU (U_Id, Id => E);
|
|
Lib_Unit := Unit (Cunit (U.Unum));
|
|
|
|
-- In the subprogram case, we are all done, the entity we want
|
|
-- is the entity for the subprogram itself. Note that we do not
|
|
-- bother to check that it is the entity that was requested.
|
|
-- the only way that could fail to be the case is if runtime is
|
|
-- hopelessly misconfigured, and it isn't worth testing for this.
|
|
|
|
if Nkind (Lib_Unit) = N_Subprogram_Declaration then
|
|
RE_Table (E) := U.Entity;
|
|
|
|
-- Otherwise we must have the package case. First check package
|
|
-- entity itself (e.g. RTE_Name for System.Interrupts.Name)
|
|
|
|
else
|
|
pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration);
|
|
Ename := RE_Chars (E);
|
|
|
|
-- First we search the package entity chain. If the package
|
|
-- only has a limited view, scan the corresponding list of
|
|
-- incomplete types.
|
|
|
|
if From_Limited_With (U.Entity) then
|
|
Pkg_Ent := First_Entity (Limited_View (U.Entity));
|
|
else
|
|
Pkg_Ent := First_Entity (U.Entity);
|
|
end if;
|
|
|
|
while Present (Pkg_Ent) loop
|
|
if Ename = Chars (Pkg_Ent) then
|
|
RE_Table (E) := Pkg_Ent;
|
|
Check_RPC;
|
|
goto Found;
|
|
end if;
|
|
|
|
Next_Entity (Pkg_Ent);
|
|
end loop;
|
|
|
|
-- If we did not find the entity in the package entity chain,
|
|
-- then check if the package entity itself matches. Note that
|
|
-- we do this check after searching the entity chain, since
|
|
-- the rule is that in case of ambiguity, we prefer the entity
|
|
-- defined within the package, rather than the package itself.
|
|
|
|
if Ename = Chars (U.Entity) then
|
|
RE_Table (E) := U.Entity;
|
|
end if;
|
|
|
|
-- If we didn't find the entity we want, something is wrong.
|
|
-- We just leave RE_Table (E) set to Empty and the appropriate
|
|
-- action will be taken by Check_CRT when we exit.
|
|
|
|
end if;
|
|
end if;
|
|
|
|
<<Found>>
|
|
|
|
-- Record whether the secondary stack is in use in order to generate
|
|
-- the proper binder code. No action is taken when the secondary stack
|
|
-- is pulled within an ignored Ghost context because all this code will
|
|
-- disappear.
|
|
|
|
if U_Id = System_Secondary_Stack and then Ghost_Mode /= Ignore then
|
|
Sec_Stack_Used := True;
|
|
end if;
|
|
|
|
Maybe_Add_With (U);
|
|
Front_End_Inlining := Save_Front_End_Inlining;
|
|
|
|
return Check_CRT (E, RE_Table (E));
|
|
end RTE;
|
|
|
|
-------------------
|
|
-- RTE_Available --
|
|
-------------------
|
|
|
|
function RTE_Available (E : RE_Id) return Boolean is
|
|
Dummy : Entity_Id;
|
|
pragma Warnings (Off, Dummy);
|
|
|
|
Result : Boolean;
|
|
|
|
Save_RTE_Available_Call : constant Boolean := RTE_Available_Call;
|
|
Save_RTE_Is_Available : constant Boolean := RTE_Is_Available;
|
|
-- These are saved recursively because the call to load a unit
|
|
-- caused by an upper level call may perform a recursive call
|
|
-- to this routine during analysis of the corresponding unit.
|
|
|
|
begin
|
|
RTE_Available_Call := True;
|
|
RTE_Is_Available := True;
|
|
Dummy := RTE (E);
|
|
Result := RTE_Is_Available;
|
|
RTE_Available_Call := Save_RTE_Available_Call;
|
|
RTE_Is_Available := Save_RTE_Is_Available;
|
|
return Result;
|
|
|
|
exception
|
|
when RE_Not_Available =>
|
|
RTE_Available_Call := Save_RTE_Available_Call;
|
|
RTE_Is_Available := Save_RTE_Is_Available;
|
|
return False;
|
|
end RTE_Available;
|
|
|
|
--------------------------
|
|
-- RTE_Record_Component --
|
|
--------------------------
|
|
|
|
function RTE_Record_Component (E : RE_Id) return Entity_Id is
|
|
U_Id : constant RTU_Id := RE_Unit_Table (E);
|
|
U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
|
|
E1 : Entity_Id;
|
|
Ename : Name_Id;
|
|
Found_E : Entity_Id;
|
|
Lib_Unit : Node_Id;
|
|
Pkg_Ent : Entity_Id;
|
|
|
|
-- The following flag is used to disable front-end inlining when
|
|
-- RTE_Record_Component is invoked. This prevents the analysis of other
|
|
-- runtime bodies when a particular spec is loaded through Rtsfind. This
|
|
-- is both efficient, and it prevents spurious visibility conflicts
|
|
-- between use-visible user entities, and entities in run-time packages.
|
|
|
|
Save_Front_End_Inlining : Boolean;
|
|
|
|
begin
|
|
-- Note: Contrary to subprogram RTE, there is no need to do any special
|
|
-- management with package system.ads because it has no record type
|
|
-- declarations.
|
|
|
|
Save_Front_End_Inlining := Front_End_Inlining;
|
|
Front_End_Inlining := False;
|
|
|
|
-- Load unit if unit not previously loaded
|
|
|
|
if not Present (U.Entity) then
|
|
Load_RTU (U_Id, Id => E);
|
|
end if;
|
|
|
|
Lib_Unit := Unit (Cunit (U.Unum));
|
|
|
|
pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration);
|
|
Ename := RE_Chars (E);
|
|
|
|
-- Search the entity in the components of record type declarations
|
|
-- found in the package entity chain.
|
|
|
|
Found_E := Empty;
|
|
Pkg_Ent := First_Entity (U.Entity);
|
|
Search : while Present (Pkg_Ent) loop
|
|
if Is_Record_Type (Pkg_Ent) then
|
|
E1 := First_Entity (Pkg_Ent);
|
|
while Present (E1) loop
|
|
if Ename = Chars (E1) then
|
|
pragma Assert (not Present (Found_E));
|
|
Found_E := E1;
|
|
end if;
|
|
|
|
Next_Entity (E1);
|
|
end loop;
|
|
end if;
|
|
|
|
Next_Entity (Pkg_Ent);
|
|
end loop Search;
|
|
|
|
-- If we didn't find the entity we want, something is wrong. The
|
|
-- appropriate action will be taken by Check_CRT when we exit.
|
|
|
|
Maybe_Add_With (U);
|
|
|
|
Front_End_Inlining := Save_Front_End_Inlining;
|
|
return Check_CRT (E, Found_E);
|
|
end RTE_Record_Component;
|
|
|
|
------------------------------------
|
|
-- RTE_Record_Component_Available --
|
|
------------------------------------
|
|
|
|
function RTE_Record_Component_Available (E : RE_Id) return Boolean is
|
|
Dummy : Entity_Id;
|
|
pragma Warnings (Off, Dummy);
|
|
|
|
Result : Boolean;
|
|
|
|
Save_RTE_Available_Call : constant Boolean := RTE_Available_Call;
|
|
Save_RTE_Is_Available : constant Boolean := RTE_Is_Available;
|
|
-- These are saved recursively because the call to load a unit
|
|
-- caused by an upper level call may perform a recursive call
|
|
-- to this routine during analysis of the corresponding unit.
|
|
|
|
begin
|
|
RTE_Available_Call := True;
|
|
RTE_Is_Available := True;
|
|
Dummy := RTE_Record_Component (E);
|
|
Result := RTE_Is_Available;
|
|
RTE_Available_Call := Save_RTE_Available_Call;
|
|
RTE_Is_Available := Save_RTE_Is_Available;
|
|
return Result;
|
|
|
|
exception
|
|
when RE_Not_Available =>
|
|
RTE_Available_Call := Save_RTE_Available_Call;
|
|
RTE_Is_Available := Save_RTE_Is_Available;
|
|
return False;
|
|
end RTE_Record_Component_Available;
|
|
|
|
-------------------
|
|
-- RTE_Error_Msg --
|
|
-------------------
|
|
|
|
procedure RTE_Error_Msg (Msg : String) is
|
|
begin
|
|
if RTE_Available_Call then
|
|
RTE_Is_Available := False;
|
|
else
|
|
Error_Msg_N (Msg, Current_Error_Node);
|
|
|
|
-- Bump count of violations if we are in configurable run-time
|
|
-- mode and this is not a continuation message.
|
|
|
|
if Configurable_Run_Time_Mode and then Msg (Msg'First) /= '\' then
|
|
Configurable_Run_Time_Violations :=
|
|
Configurable_Run_Time_Violations + 1;
|
|
end if;
|
|
end if;
|
|
end RTE_Error_Msg;
|
|
|
|
----------------
|
|
-- RTU_Entity --
|
|
----------------
|
|
|
|
function RTU_Entity (U : RTU_Id) return Entity_Id is
|
|
begin
|
|
return RT_Unit_Table (U).Entity;
|
|
end RTU_Entity;
|
|
|
|
----------------
|
|
-- RTU_Loaded --
|
|
----------------
|
|
|
|
function RTU_Loaded (U : RTU_Id) return Boolean is
|
|
begin
|
|
return Present (RT_Unit_Table (U).Entity);
|
|
end RTU_Loaded;
|
|
|
|
--------------------
|
|
-- Set_RTU_Loaded --
|
|
--------------------
|
|
|
|
procedure Set_RTU_Loaded (N : Node_Id) is
|
|
Loc : constant Source_Ptr := Sloc (N);
|
|
Unum : constant Unit_Number_Type := Get_Source_Unit (Loc);
|
|
Uname : constant Unit_Name_Type := Unit_Name (Unum);
|
|
E : constant Entity_Id :=
|
|
Defining_Entity (Unit (Cunit (Unum)));
|
|
begin
|
|
pragma Assert (Is_Predefined_Unit (Unum));
|
|
|
|
-- Loop through entries in RTU table looking for matching entry
|
|
|
|
for U_Id in RTU_Id'Range loop
|
|
|
|
-- Here we have a match
|
|
|
|
if Get_Unit_Name (U_Id) = Uname then
|
|
declare
|
|
U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
|
|
-- The RT_Unit_Table entry that may need updating
|
|
|
|
begin
|
|
-- If entry is not set, set it now, and indicate that it was
|
|
-- loaded through an explicit context clause.
|
|
|
|
if No (U.Entity) then
|
|
U := (Entity => E,
|
|
Uname => Get_Unit_Name (U_Id),
|
|
Unum => Unum,
|
|
First_Implicit_With => Empty);
|
|
end if;
|
|
|
|
return;
|
|
end;
|
|
end if;
|
|
end loop;
|
|
end Set_RTU_Loaded;
|
|
|
|
-------------------------
|
|
-- SPARK_Implicit_Load --
|
|
-------------------------
|
|
|
|
procedure SPARK_Implicit_Load (E : RE_Id) is
|
|
Unused : Entity_Id;
|
|
|
|
begin
|
|
pragma Assert (GNATprove_Mode);
|
|
|
|
-- Force loading of a predefined unit
|
|
|
|
Unused := RTE (E);
|
|
end SPARK_Implicit_Load;
|
|
|
|
end Rtsfind;
|