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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- R T S F I N D --
+-- --
+-- B o d y --
+-- --
+-- $Revision: 1.96 $
+-- --
+-- 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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- --
+------------------------------------------------------------------------------
+
+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;
+ Enode : Node_Id;
+
+ 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
+ -- 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;
+
+ Enode := Current_Error_Node;
+
+ -- 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!
+
+ Load_Fail ("entity not in package", U_Id, RE_Id'Image (E));
+ raise Program_Error;
+ 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 (Enode) /= Standard_Location
+ and then not
+ Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Enode)))
+ then
+ Disallow_In_No_Run_Time_Mode (Enode);
+ 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;