-- --
-- B o d y --
-- --
--- $Revision$
--- --
--- Copyright (C) 1992-2002, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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 2, or (at your option) any later ver- --
+-- 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 COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- 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. --
--- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- 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 Fname; use Fname;
-with Fname.UF; use Fname.UF;
-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_Ch7; use Sem_Ch7;
-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;
+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; use Exp_Dist;
+with Fname; use Fname;
+with Fname.UF; use Fname.UF;
+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_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 --
----------------
-- 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 Inspector. 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;
- Unum : Unit_Number_Type;
- Withed : Boolean;
+ 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;
-- first time, its ID is stored in this array, so that subsequent calls
-- for the same entity can be satisfied immediately.
- RE_Table : array (RE_Id) of Entity_Id;
+ -- 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.
- --------------------------
- -- Generation of WITH's --
- --------------------------
+ RE_Table : array (RE_Id) of Entity_Id;
- -- When a unit is implicitly loaded as a result of a call to RTE, it
- -- is necessary to create an implicit with to ensure that the object
- -- is correctly loaded by the binder. Such with statements are only
- -- required when the request is from the extended main unit (if a
- -- client needs a with, that will be taken care of when the client
- -- is compiled.
+ --------------------------------
+ -- Generation of with_clauses --
+ --------------------------------
- -- We always attach the with to the main unit. This is not perfectly
- -- accurate in terms of elaboration requirements, but it is close
- -- enough, since the units that are accessed using rtsfind do not
- -- have delicate elaboration requirements.
+ -- 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 SofCheck Inspector.
- -- The flag Withed in the unit table record is initially set to False.
- -- It is set True if a with has been generated for the main unit for
- -- the corresponding unit.
+ -- The field First_Implicit_With in the unit table record are used to
+ -- avoid creating duplicate with_clauses.
-----------------------
-- Local Subprograms --
-----------------------
- procedure Load_Fail (S : String; U_Id : RTU_Id; Ent_Name : String := "");
- -- Internal procedure called if we can't find the entity or unit.
- -- The parameter is a detailed error message that is to be given.
- -- S is a reason for failing to compile the file. U_Id is the unit
- -- id, and Ent_Name, if non-null, is the associated entity name.
+ 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).
+ -- Above documentation not clear ???
- function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type;
- -- Retrieves the Unit Name given a unit id represented by its
- -- enumaration value in RTU_Id.
+ 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).
- procedure Load_RTU (U_Id : RTU_Id; Use_Setting : Boolean := False);
+ 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);
+ -- 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, analyzed, and added to the with list, and the entry in
- -- RT_Unit_Table is updated to reflect the load. The second parameter
- -- indicates 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 Text_IO_Kludge procedure, which may materialize an
- -- entity of Text_IO (or Wide_Text_IO) that was previously unknown.
+ -- 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 Text_IO_Kludge 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. This call
+ -- is only effective in All_Errors mode.
function RE_Chars (E : RE_Id) return Name_Id;
- -- Given a RE_Id value returns the Chars of the corresponding entity.
+ -- 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 not 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)
+ then
+ Entity_Not_Defined (E);
+ raise RE_Not_Available;
+ end if;
+
+ -- Otherwise entity is accessible
+
+ return Eid;
+ end if;
+ end Check_CRT;
+
+ ------------------------
+ -- 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 Is_Predefined_File_Name
+ (Unit_File_Name (Get_Source_Unit (Sloc (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;
+
+ Output_Entity_Name (Id, "not defined");
+ end Entity_Not_Defined;
-------------------
-- Get_Unit_Name --
if U_Id in Ada_Calendar_Child then
Name_Buffer (13) := '.';
+ elsif U_Id in Ada_Dispatching_Child then
+ Name_Buffer (16) := '.';
+
elsif U_Id in Ada_Finalization_Child then
Name_Buffer (17) := '.';
+ elsif U_Id in Ada_Interrupts_Child then
+ Name_Buffer (15) := '.';
+
elsif U_Id in Ada_Real_Time_Child then
Name_Buffer (14) := '.';
elsif U_Id in Ada_Streams_Child then
Name_Buffer (12) := '.';
+ elsif U_Id in Ada_Strings_Child then
+ Name_Buffer (12) := '.';
+
elsif U_Id in Ada_Text_IO_Child then
Name_Buffer (12) := '.';
elsif U_Id in Ada_Wide_Text_IO_Child then
Name_Buffer (17) := '.';
+
+ elsif U_Id in Ada_Wide_Wide_Text_IO_Child then
+ Name_Buffer (22) := '.';
end if;
elsif U_Id in Interfaces_Child then
elsif U_Id in System_Child then
Name_Buffer (7) := '.';
+ if U_Id in System_Strings_Child then
+ Name_Buffer (15) := '.';
+ end if;
+
if U_Id in System_Tasking_Child then
Name_Buffer (15) := '.';
end if;
for J in RE_Id loop
RE_Table (J) := Empty;
end loop;
+
+ RTE_Is_Available := False;
end Initialize;
------------
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_Kludge_Unit --
----------------------------
return
Nkind (Prf) = N_Identifier
and then
- (Chars (Prf) = Name_Text_IO or else Chars (Prf) = Name_Wide_Text_IO)
+ (Chars (Prf) = Name_Text_IO
+ or else
+ Chars (Prf) = Name_Wide_Text_IO
+ or else
+ Chars (Prf) = Name_Wide_Wide_Text_IO)
and then
Nkind (Sel) = N_Identifier
and then
Chars (Sel) in Text_IO_Package_Name;
-
end Is_Text_IO_Kludge_Unit;
---------------
-- Load_Fail --
---------------
- procedure Load_Fail (S : String; U_Id : RTU_Id; Ent_Name : String := "") is
+ procedure Load_Fail (S : String; U_Id : RTU_Id; Id : RE_Id) is
+ M : String (1 .. 100);
+ P : Natural := 0;
+
begin
- Set_Standard_Error;
+ -- Output header message
- Write_Str ("fatal error: run-time library configuration error");
- Write_Eol;
+ 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;
- if Ent_Name /= "" then
- Write_Str ("cannot locate """);
+ -- Output file name and reason string
- -- Copy name skipping initial RE_ or RO_XX characters
+ M (1 .. 6) := "\file ";
+ P := 6;
- if Ent_Name (1 .. 2) = "RE" then
- for J in 4 .. Ent_Name'Length loop
- Name_Buffer (J - 3) := Ent_Name (J);
- end loop;
- else
- for J in 7 .. Ent_Name'Length loop
- Name_Buffer (J - 6) := Ent_Name (J);
- end loop;
- end if;
+ 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;
- Name_Len := Ent_Name'Length - 3;
- Set_Casing (Mixed_Case);
- Write_Str (Name_Buffer (1 .. Name_Len));
- Write_Str (""" in file """);
+ 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
- Write_Str ("cannot load file """);
+ raise Unrecoverable_Error;
end if;
-
- Write_Name
- (Get_File_Name (RT_Unit_Table (U_Id).Uname, Subunit => False));
- Write_Str (""" (");
- Write_Str (S);
- Write_Char (')');
- Write_Eol;
- Set_Standard_Output;
- raise Unrecoverable_Error;
end Load_Fail;
--------------
-- Load_RTU --
--------------
- procedure Load_RTU (U_Id : RTU_Id; Use_Setting : Boolean := False) is
- Loaded : Boolean;
+ 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 : Elist_Id := New_Elmt_List;
+ 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.
+ -- 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 the visibility of ancestors after compiling RTU
--------------------------------
-- Restore_Private_Visibility --
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));
begin
Par := Scope (Current_Scope);
-
while Present (Par)
and then Par /= Standard_Standard
loop
return;
end if;
+ -- Note if secondary stack is used
+
+ if U_Id = System_Secondary_Stack then
+ Opt.Sec_Stack_Used := True;
+ end if;
+
-- 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.Withed := False;
- Loaded := Is_Loaded (U.Uname);
+ 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.
- U.Unum :=
- Load_Unit
- (Load_Name => U.Uname,
- Required => False,
- Subunit => False,
- Error_Node => Empty);
+ -- We save style checking switches and turn off style checking for
+ -- loading the unit, since we don't want any style checking!
- if U.Unum = No_Unit then
- Load_Fail ("unit not found", U_Id);
+ 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) then
- Load_Fail ("parser errors", U_Id);
+ Load_Fail ("had parser errors", U_Id, Id);
end if;
-- Make sure that the unit is analyzed
declare
- Was_Analyzed : Boolean := Analyzed (Cunit (Current_Sem_Unit));
+ Was_Analyzed : constant Boolean :=
+ Analyzed (Cunit (Current_Sem_Unit));
begin
- -- Pretend that the current unit is analysed, 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...
+ -- 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
-- 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 System ordered in an
- -- appropriate manner.
+ -- 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
- Save_Private_Visibility;
- Semantics (Cunit (U.Unum));
- Restore_Private_Visibility;
+ -- 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 Fatal_Error (U.Unum) then
- Load_Fail ("semantic errors", U_Id);
+ if From_With_Type (Cunit_Entity (U.Unum)) then
+ null;
+
+ else
+ Save_Private_Visibility;
+ Semantics (Cunit (U.Unum));
+ Restore_Private_Visibility;
+
+ if Fatal_Error (U.Unum) then
+ Load_Fail ("had semantic errors", U_Id, Id);
+ end if;
end if;
end if;
end if;
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_Reference_To (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_Reference_To (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 then 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 not already in the context of 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_Library_Unit (Withn, Cunit (U.Unum));
+ Set_Corresponding_Spec (Withn, U.Entity);
+ Set_First_Name (Withn, True);
+ Set_Implicit_With (Withn, True);
+ 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);
+
+ 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;
+
+ -- Add entity name and closing quote to message
+
+ Name_Len := RE_Image'Length - 3;
+ Name_Buffer (1 .. Name_Len) := RE_Image (4 .. RE_Image'Length);
+ 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 --
--------------
Pkg_Ent : Entity_Id;
Ename : Name_Id;
- Ravenscar : constant Boolean := Restricted_Profile;
-
-- The following 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 it prevents spurious visibility conflicts between use-visible
-- user entities, and entities in run-time packages.
- -- In No_Run_Time mode, subprograms marked Inlined_Always must be
- -- inlined, so in the case we retain the Front_End_Inlining mode.
-
Save_Front_End_Inlining : Boolean;
procedure Check_RPC;
-- Reject programs that make use of distribution features not supported
- -- on the current target. On such targets (VMS, Vxworks, others?) we
- -- only provide a minimal body for System.Rpc that only supplies an
- -- implementation of partition_id.
+ -- on the current target. Also check that the PCS is compatible with
+ -- the code generator version. On such targets (VMS, 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.
- function Make_Unit_Name (N : Node_Id) return Node_Id;
- -- If the unit is a child unit, build fully qualified name for use
- -- in with_clause.
-
---------------
-- Check_RPC --
---------------
procedure Check_RPC is
- Body_Name : Unit_Name_Type;
- Unum : Unit_Number_Type;
-
begin
-- Bypass this check if debug flag -gnatdR set
return;
end if;
- -- Otherwise we need the check if we are going after one of
- -- the critical entities in System.RPC in stubs mode.
+ -- Otherwise we need the check if we are going after one of the
+ -- critical entities in System.RPC / System.Partition_Interface.
- if (Distribution_Stub_Mode = Generate_Receiver_Stub_Body
- or else
- Distribution_Stub_Mode = Generate_Caller_Stub_Body)
- and then (E = RE_Do_Rpc
- or else E = RE_Do_Apc
- or else E = RE_Params_Stream_Type
- or else E = RE_RPC_Receiver)
+ 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
- -- Load body of System.Rpc, and abort if this is the body that is
- -- provided by GNAT, for which these features are not supported
- -- on current target. We identify the gnat body by the presence
- -- of a local entity called Gnat in the first declaration.
-
- Lib_Unit := Unit (Cunit (U.Unum));
- Body_Name := Get_Body_Name (Get_Unit_Name (Lib_Unit));
- Unum :=
- Load_Unit
- (Load_Name => Body_Name,
- Required => False,
- Subunit => False,
- Error_Node => Empty,
- Renamings => True);
-
- if Unum /= No_Unit then
- declare
- Decls : List_Id := Declarations (Unit (Cunit (Unum)));
-
- begin
- if Present (Decls)
- and then Nkind (First (Decls)) = N_Object_Declaration
- and then
- Chars (Defining_Identifier (First (Decls))) = Name_Gnat
- then
- Set_Standard_Error;
- Write_Str ("distribution feature not supported");
- Write_Eol;
- raise Unrecoverable_Error;
- end if;
- end;
+ -- 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_System_Entity --
- ------------------------
+ -----------------------
+ -- Find_Local_Entity --
+ -----------------------
function Find_Local_Entity (E : RE_Id) return Entity_Id is
- RE_Str : String renames RE_Id'Image (E);
+ RE_Str : constant String := RE_Id'Image (E);
+ Nam : Name_Id;
Ent : Entity_Id;
Save_Nam : constant String := Name_Buffer (1 .. Name_Len);
Name_Buffer (1 .. Name_Len) :=
RE_Str (RE_Str'First + 3 .. RE_Str'Last);
- Ent := Entity_Id (Get_Name_Table_Info (Name_Find));
+ Nam := Name_Find;
+ Ent := Entity_Id (Get_Name_Table_Info (Nam));
Name_Len := Save_Nam'Length;
Name_Buffer (1 .. Name_Len) := Save_Nam;
return Ent;
end Find_Local_Entity;
- --------------------
- -- Make_Unit_Name --
- --------------------
-
- function Make_Unit_Name (N : Node_Id) return Node_Id is
- Nam : Node_Id;
- Scop : Entity_Id;
-
- begin
- Nam := New_Reference_To (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_Reference_To (Scop, Standard_Location),
- Selector_Name => Nam);
- Set_Entity (Nam, U.Entity);
-
- Scop := Scope (Scop);
- end loop;
- end if;
-
- return Nam;
- end Make_Unit_Name;
-
-- Start of processing for RTE
begin
-
- -- Check violation of no run time and ravenscar mode
-
- if No_Run_Time
- and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
- then
- if not Ravenscar
- or else not OK_To_Use_In_Ravenscar_Mode (U_Id)
- then
- Disallow_In_No_Run_Time_Mode (Current_Error_Node);
- return Empty;
- end if;
- end if;
-
-- 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
and then Analyzed (Main_Unit_Entity)
and then not Is_Child_Unit (Main_Unit_Entity)
then
- return Find_Local_Entity (E);
+ return Check_CRT (E, Find_Local_Entity (E));
end if;
Save_Front_End_Inlining := Front_End_Inlining;
- Front_End_Inlining := No_Run_Time;
+ Front_End_Inlining := False;
-- Load unit if unit not previously loaded
if No (RE_Table (E)) then
- Load_RTU (U_Id);
+ Load_RTU (U_Id, Id => E);
Lib_Unit := Unit (Cunit (U.Unum));
-- In the subprogram case, we are all done, the entity we want
if Nkind (Lib_Unit) = N_Subprogram_Declaration then
RE_Table (E) := U.Entity;
- -- Otherwise we must have the package case, and here we have to
- -- search the package entity chain for the entity we want. The
- -- entity we want must be present in this chain, or we have a
- -- misconfigured runtime.
+ -- 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);
- Pkg_Ent := First_Entity (U.Entity);
+ -- First we search the package entity chain. If the package
+ -- only has a limited view, scan the corresponding list of
+ -- incomplete types.
+
+ if From_With_Type (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
Next_Entity (Pkg_Ent);
end loop;
- -- If we didn't find the unit we want, something is wrong
- -- although in no run time mode, we already gave a suitable
- -- message, and so we simply return Empty, and the caller must
- -- be prepared to handle this if the RTE call is otherwise
- -- possible in high integrity mode.
+ -- 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 No_Run_Time
- and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
- then
- Front_End_Inlining := Save_Front_End_Inlining;
- return Empty;
-
- else
- Load_Fail ("entity not in package", U_Id, RE_Id'Image (E));
- raise Program_Error;
+ 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;
- -- See if we have to generate a with for this entity. We generate
- -- a with if the current unit is part of the extended main code
- -- unit, and if we have not already added the with. The with is
- -- added to the appropriate unit (the current one).
-
<<Found>>
- if (not U.Withed)
- and then
- In_Extended_Main_Code_Unit (Cunit_Entity (Current_Sem_Unit))
- then
- U.Withed := True;
+ Maybe_Add_With (U);
- declare
- Withn : Node_Id;
- Lib_Unit : Node_Id;
+ Front_End_Inlining := Save_Front_End_Inlining;
+ return Check_CRT (E, RE_Table (E));
+ end RTE;
- begin
- Lib_Unit := Unit (Cunit (U.Unum));
- Withn :=
- Make_With_Clause (Standard_Location,
- Name =>
- Make_Unit_Name
- (Defining_Unit_Name (Specification (Lib_Unit))));
- Set_Library_Unit (Withn, Cunit (U.Unum));
- Set_Corresponding_Spec (Withn, U.Entity);
- Set_First_Name (Withn, True);
- Set_Implicit_With (Withn, True);
-
- Mark_Rewrite_Insertion (Withn);
- Append (Withn, Context_Items (Cunit (Current_Sem_Unit)));
- end;
+ -------------------
+ -- 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 RE_Table (E);
- end RTE;
+ 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_File_Name (Unit_File_Name (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;
--------------------
-- Text_IO_Kludge --
type Name_Map_Type is array (Text_IO_Package_Name) of RTU_Id;
- Name_Map : Name_Map_Type := Name_Map_Type'(
+ 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_Integer_IO => Ada_Text_IO_Integer_IO,
Name_Modular_IO => Ada_Text_IO_Modular_IO);
- Wide_Name_Map : Name_Map_Type := Name_Map_Type'(
+ 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_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 identifier or a selected component
- -- whose selector_name is not an identifier.
+ -- 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);
-- 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_Text_IO already loaded, then load the proper child.
+ -- 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
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_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.
+ -- 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
- Load_RTU (Name_Map (Chrs), In_Use (Cunit_Entity (U)));
- Set_Is_Visible_Child_Unit
- (RT_Unit_Table (Name_Map (Chrs)).Entity);
+ To_Load := Name_Map (Chrs);
elsif Name_Buffer (1 .. 12) = "a-witeio.ads" then
- Load_RTU (Wide_Name_Map (Chrs), In_Use (Cunit_Entity (U)));
- Set_Is_Visible_Child_Unit
- (RT_Unit_Table (Wide_Name_Map (Chrs)).Entity);
+ 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_Child_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 Parent_Name /= No_Unit_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 Text_IO_Kludge;
end Rtsfind;
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