+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- R T S F I N D --
--- --
--- B o d y --
--- --
--- $Revision: 1.3.10.1 $
--- --
--- Copyright (C) 1992-2001, 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- --
--- 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. --
--- --
--- 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 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;
-
-package body Rtsfind is
-
- ----------------
- -- 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.
-
- type RT_Unit_Table_Record is record
- Entity : Entity_Id;
- Uname : Unit_Name_Type;
- Unum : Unit_Number_Type;
- Withed : Boolean;
- 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.
-
- RE_Table : array (RE_Id) of Entity_Id;
-
- --------------------------
- -- Generation of WITH's --
- --------------------------
-
- -- 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.
-
- -- 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.
-
- -- 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.
-
- -----------------------
- -- 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 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 Load_RTU (U_Id : RTU_Id; 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.
-
- function RE_Chars (E : RE_Id) return Name_Id;
- -- Given a RE_Id value returns the Chars of the corresponding entity.
-
- -------------------
- -- Get_Unit_Name --
- -------------------
-
- 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_Child then
- Name_Buffer (4) := '.';
-
- if U_Id in Ada_Calendar_Child then
- Name_Buffer (13) := '.';
-
- elsif U_Id in Ada_Finalization_Child then
- Name_Buffer (17) := '.';
-
- 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_Text_IO_Child then
- Name_Buffer (12) := '.';
-
- elsif U_Id in Ada_Wide_Text_IO_Child then
- Name_Buffer (17) := '.';
- end if;
-
- elsif U_Id in Interfaces_Child then
- Name_Buffer (11) := '.';
-
- elsif U_Id in System_Child then
- Name_Buffer (7) := '.';
-
- if U_Id in System_Tasking_Child then
- Name_Buffer (15) := '.';
- end if;
-
- if U_Id in System_Tasking_Restricted_Child then
- Name_Buffer (26) := '.';
- end if;
-
- if U_Id in System_Tasking_Protected_Objects_Child then
- Name_Buffer (33) := '.';
- end if;
-
- if U_Id in System_Tasking_Async_Delays_Child 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;
- end loop;
-
- for J in RE_Id loop
- RE_Table (J) := Empty;
- end loop;
- 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 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_Text_IO_Kludge_Unit --
- ----------------------------
-
- function Is_Text_IO_Kludge_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) = Name_Text_IO or else Chars (Prf) = Name_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
- begin
- Set_Standard_Error;
-
- Write_Str ("fatal error: run-time library configuration error");
- Write_Eol;
-
- if Ent_Name /= "" then
- Write_Str ("cannot locate """);
-
- -- Copy name skipping initial RE_ or RO_XX characters
-
- 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;
-
- Name_Len := Ent_Name'Length - 3;
- Set_Casing (Mixed_Case);
- Write_Str (Name_Buffer (1 .. Name_Len));
- Write_Str (""" in file """);
-
- else
- Write_Str ("cannot load file """);
- 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;
- U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
- Priv_Par : 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;
-
- -- Start of processing for Load_RTU
-
- begin
- -- Nothing to do if unit is already loaded
-
- if Present (U.Entity) then
- return;
- 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);
-
- -- 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);
-
- if U.Unum = No_Unit then
- Load_Fail ("unit not found", U_Id);
-
- elsif Fatal_Error (U.Unum) then
- Load_Fail ("parser errors", U_Id);
- end if;
-
- -- Make sure that the unit is analyzed
-
- declare
- Was_Analyzed : 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...
-
- -- 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 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 Fatal_Error (U.Unum) then
- Load_Fail ("semantic errors", U_Id);
- 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;
- end Load_RTU;
-
- --------------
- -- 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
- U_Id : constant RTU_Id := RE_Unit_Table (E);
- U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
-
- Ent : Entity_Id;
- Lib_Unit : Node_Id;
- Pkg_Ent : Entity_Id;
- Ename : Name_Id;
-
- Ravenscar : constant Boolean := Restricted_Profile;
-
- 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.
-
- 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
-
- 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 in stubs mode.
-
- 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)
- 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;
- end if;
- end if;
- end Check_RPC;
-
- ------------------------
- -- Find_System_Entity --
- ------------------------
-
- function Find_Local_Entity (E : RE_Id) return Entity_Id is
- RE_Str : String renames RE_Id'Image (E);
- 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);
-
- Ent := Entity_Id (Get_Name_Table_Info (Name_Find));
-
- 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
- -- 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 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 Find_Local_Entity (E);
- end if;
-
- -- Load unit if unit not previously loaded
-
- if No (RE_Table (E)) then
- Load_RTU (U_Id);
- 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, 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.
-
- else
- pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration);
- Ename := RE_Chars (E);
-
- Pkg_Ent := First_Entity (U.Entity);
-
- 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 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 No_Run_Time
- and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
- then
- return Empty;
-
- else
- Load_Fail ("entity not in package", U_Id, RE_Id'Image (E));
- raise Program_Error;
- end if;
- 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;
-
- declare
- Withn : Node_Id;
- Lib_Unit : Node_Id;
-
- 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;
- end if;
-
- -- We can now obtain the entity. Check that the no run time condition
- -- is not violated. Note that we do not signal the error if we detect
- -- it in a runtime unit. This can only arise if the user explicitly
- -- with'ed the runtime unit (or another runtime unit that uses it
- -- transitively), or if some acceptable (e.g. inlined) entity is
- -- fetched from a unit, some of whose other routines or entities
- -- violate the conditions. In the latter case, it does not matter,
- -- since we won't be using those entities.
-
- Ent := RE_Table (E);
-
- if Is_Subprogram (Ent)
- and then not Is_Inlined (Ent)
- and then Sloc (Current_Error_Node) /= Standard_Location
- and then not
- Is_Predefined_File_Name
- (Unit_File_Name (Get_Source_Unit (Current_Error_Node)))
- and then not Ravenscar
- then
- Disallow_In_No_Run_Time_Mode (Current_Error_Node);
- end if;
-
- return Ent;
- end RTE;
-
- --------------------
- -- Text_IO_Kludge --
- --------------------
-
- procedure Text_IO_Kludge (Nam : Node_Id) is
- Chrs : Name_Id;
-
- type Name_Map_Type is array (Text_IO_Package_Name) of RTU_Id;
-
- Name_Map : 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 : 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);
-
- begin
- -- Nothing to do if name is not identifier or a selected component
- -- whose selector_name is not 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_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_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);
-
- 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);
- end if;
- end if;
- end loop;
- end if;
- end Text_IO_Kludge;
-
-end Rtsfind;
projects / msp430-gcc.git / blobdiff