------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- L I B -- -- -- -- B o d y -- -- -- -- -- -- 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. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ pragma Style_Checks (All_Checks); -- Subprogram ordering not enforced in this unit -- (because of some logical groupings). with Atree; use Atree; with Einfo; use Einfo; with Fname; use Fname; with Namet; use Namet; with Namet; use Namet; with Output; use Output; with Sinfo; use Sinfo; with Sinput; use Sinput; with Stand; use Stand; with Stringt; use Stringt; with Tree_IO; use Tree_IO; with Uname; use Uname; package body Lib is ----------------------- -- Local Subprograms -- ----------------------- type SEU_Result is ( Yes_Before, -- S1 is in same extended unit as S2 and appears before it Yes_Same, -- S1 is in same extended unit as S2, Slocs are the same Yes_After, -- S1 is in same extended unit as S2, and appears after it No); -- S2 is not in same extended unit as S2 function Check_Same_Extended_Unit (S1, S2 : Source_Ptr) return SEU_Result; -- Used by In_Same_Extended_Unit and Earlier_In_Extended_Unit. Returns -- value as described above. -------------------------------------------- -- Access Functions for Unit Table Fields -- -------------------------------------------- function Cunit (U : Unit_Number_Type) return Node_Id is begin return Units.Table (U).Cunit; end Cunit; function Cunit_Entity (U : Unit_Number_Type) return Entity_Id is begin return Units.Table (U).Cunit_Entity; end Cunit_Entity; function Dependency_Num (U : Unit_Number_Type) return Nat is begin return Units.Table (U).Dependency_Num; end Dependency_Num; function Dependent_Unit (U : Unit_Number_Type) return Boolean is begin return Units.Table (U).Dependent_Unit; end Dependent_Unit; function Dynamic_Elab (U : Unit_Number_Type) return Boolean is begin return Units.Table (U).Dynamic_Elab; end Dynamic_Elab; function Error_Location (U : Unit_Number_Type) return Source_Ptr is begin return Units.Table (U).Error_Location; end Error_Location; function Expected_Unit (U : Unit_Number_Type) return Unit_Name_Type is begin return Units.Table (U).Expected_Unit; end Expected_Unit; function Fatal_Error (U : Unit_Number_Type) return Boolean is begin return Units.Table (U).Fatal_Error; end Fatal_Error; function Generate_Code (U : Unit_Number_Type) return Boolean is begin return Units.Table (U).Generate_Code; end Generate_Code; function Has_RACW (U : Unit_Number_Type) return Boolean is begin return Units.Table (U).Has_RACW; end Has_RACW; function Ident_String (U : Unit_Number_Type) return Node_Id is begin return Units.Table (U).Ident_String; end Ident_String; function Loading (U : Unit_Number_Type) return Boolean is begin return Units.Table (U).Loading; end Loading; function Main_Priority (U : Unit_Number_Type) return Int is begin return Units.Table (U).Main_Priority; end Main_Priority; function Source_Index (U : Unit_Number_Type) return Source_File_Index is begin return Units.Table (U).Source_Index; end Source_Index; function Unit_File_Name (U : Unit_Number_Type) return File_Name_Type is begin return Units.Table (U).Unit_File_Name; end Unit_File_Name; function Unit_Name (U : Unit_Number_Type) return Unit_Name_Type is begin return Units.Table (U).Unit_Name; end Unit_Name; ------------------------------------------ -- Subprograms to Set Unit Table Fields -- ------------------------------------------ procedure Set_Cunit (U : Unit_Number_Type; N : Node_Id) is begin Units.Table (U).Cunit := N; end Set_Cunit; procedure Set_Cunit_Entity (U : Unit_Number_Type; E : Entity_Id) is begin Units.Table (U).Cunit_Entity := E; Set_Is_Compilation_Unit (E); end Set_Cunit_Entity; procedure Set_Dynamic_Elab (U : Unit_Number_Type; B : Boolean := True) is begin Units.Table (U).Dynamic_Elab := B; end Set_Dynamic_Elab; procedure Set_Error_Location (U : Unit_Number_Type; W : Source_Ptr) is begin Units.Table (U).Error_Location := W; end Set_Error_Location; procedure Set_Fatal_Error (U : Unit_Number_Type; B : Boolean := True) is begin Units.Table (U).Fatal_Error := B; end Set_Fatal_Error; procedure Set_Generate_Code (U : Unit_Number_Type; B : Boolean := True) is begin Units.Table (U).Generate_Code := B; end Set_Generate_Code; procedure Set_Has_RACW (U : Unit_Number_Type; B : Boolean := True) is begin Units.Table (U).Has_RACW := B; end Set_Has_RACW; procedure Set_Ident_String (U : Unit_Number_Type; N : Node_Id) is begin Units.Table (U).Ident_String := N; end Set_Ident_String; procedure Set_Loading (U : Unit_Number_Type; B : Boolean := True) is begin Units.Table (U).Loading := B; end Set_Loading; procedure Set_Main_Priority (U : Unit_Number_Type; P : Int) is begin Units.Table (U).Main_Priority := P; end Set_Main_Priority; procedure Set_Unit_Name (U : Unit_Number_Type; N : Unit_Name_Type) is begin Units.Table (U).Unit_Name := N; end Set_Unit_Name; ------------------------------ -- Check_Same_Extended_Unit -- ------------------------------ function Check_Same_Extended_Unit (S1, S2 : Source_Ptr) return SEU_Result is Sloc1 : Source_Ptr; Sloc2 : Source_Ptr; Sind1 : Source_File_Index; Sind2 : Source_File_Index; Inst1 : Source_Ptr; Inst2 : Source_Ptr; Unum1 : Unit_Number_Type; Unum2 : Unit_Number_Type; Unit1 : Node_Id; Unit2 : Node_Id; Depth1 : Nat; Depth2 : Nat; begin if S1 = No_Location or else S2 = No_Location then return No; elsif S1 = Standard_Location then if S2 = Standard_Location then return Yes_Same; else return No; end if; elsif S2 = Standard_Location then return No; end if; Sloc1 := S1; Sloc2 := S2; Unum1 := Get_Code_Unit (Sloc1); Unum2 := Get_Code_Unit (Sloc2); loop Sind1 := Get_Source_File_Index (Sloc1); Sind2 := Get_Source_File_Index (Sloc2); if Sind1 = Sind2 then if Sloc1 < Sloc2 then return Yes_Before; elsif Sloc1 > Sloc2 then return Yes_After; else return Yes_Same; end if; end if; -- OK, the two nodes are in separate source elements, but this is not -- decisive, because of the issue of subunits and instantiations. -- First we deal with subunits, since if the subunit is in an -- instantiation, we know that the parent is in the corresponding -- instantiation, since that is the only way we can have a subunit -- that is part of an instantiation. Unit1 := Unit (Cunit (Unum1)); Unit2 := Unit (Cunit (Unum2)); if Nkind (Unit1) = N_Subunit and then Present (Corresponding_Stub (Unit1)) then -- Both in subunits. They could have a common ancestor. If they -- do, then the deeper one must have a longer unit name. Replace -- the deeper one with its corresponding stub, in order to find -- nearest common ancestor, if any. if Nkind (Unit2) = N_Subunit and then Present (Corresponding_Stub (Unit2)) then if Length_Of_Name (Unit_Name (Unum1)) < Length_Of_Name (Unit_Name (Unum2)) then Sloc2 := Sloc (Corresponding_Stub (Unit2)); Unum2 := Get_Source_Unit (Sloc2); goto Continue; else Sloc1 := Sloc (Corresponding_Stub (Unit1)); Unum1 := Get_Source_Unit (Sloc1); goto Continue; end if; -- Nod1 in subunit, Nod2 not else Sloc1 := Sloc (Corresponding_Stub (Unit1)); Unum1 := Get_Source_Unit (Sloc1); goto Continue; end if; -- Nod2 in subunit, Nod1 not elsif Nkind (Unit2) = N_Subunit and then Present (Corresponding_Stub (Unit2)) then Sloc2 := Sloc (Corresponding_Stub (Unit2)); Unum2 := Get_Source_Unit (Sloc2); goto Continue; end if; -- At this stage we know that neither is a subunit, so we deal -- with instantiations, since we culd have a common ancestor Inst1 := Instantiation (Sind1); Inst2 := Instantiation (Sind2); if Inst1 /= No_Location then -- Both are instantiations if Inst2 /= No_Location then Depth1 := Instantiation_Depth (Sloc1); Depth2 := Instantiation_Depth (Sloc2); if Depth1 < Depth2 then Sloc2 := Inst2; Unum2 := Get_Source_Unit (Sloc2); goto Continue; elsif Depth1 > Depth2 then Sloc1 := Inst1; Unum1 := Get_Source_Unit (Sloc1); goto Continue; else Sloc1 := Inst1; Sloc2 := Inst2; Unum1 := Get_Source_Unit (Sloc1); Unum2 := Get_Source_Unit (Sloc2); goto Continue; end if; -- Only first node is in instantiation else Sloc1 := Inst1; Unum1 := Get_Source_Unit (Sloc1); goto Continue; end if; -- Only second node is instantiation elsif Inst2 /= No_Location then Sloc2 := Inst2; Unum2 := Get_Source_Unit (Sloc2); goto Continue; end if; -- No instantiations involved, so we are not in the same unit -- However, there is one case still to check, namely the case -- where one location is in the spec, and the other in the -- corresponding body (the spec location is earlier). if Nkind (Unit1) = N_Subprogram_Body or else Nkind (Unit1) = N_Package_Body then if Library_Unit (Cunit (Unum1)) = Cunit (Unum2) then return Yes_After; end if; elsif Nkind (Unit2) = N_Subprogram_Body or else Nkind (Unit2) = N_Package_Body then if Library_Unit (Cunit (Unum2)) = Cunit (Unum1) then return Yes_Before; end if; end if; -- If that special case does not occur, then we are certain that -- the two locations are really in separate units. return No; <> null; end loop; end Check_Same_Extended_Unit; ------------------------------- -- Compilation_Switches_Last -- ------------------------------- function Compilation_Switches_Last return Nat is begin return Compilation_Switches.Last; end Compilation_Switches_Last; ------------------------------ -- Earlier_In_Extended_Unit -- ------------------------------ function Earlier_In_Extended_Unit (S1, S2 : Source_Ptr) return Boolean is begin return Check_Same_Extended_Unit (S1, S2) = Yes_Before; end Earlier_In_Extended_Unit; ---------------------------- -- Entity_Is_In_Main_Unit -- ---------------------------- function Entity_Is_In_Main_Unit (E : Entity_Id) return Boolean is S : Entity_Id; begin S := Scope (E); while S /= Standard_Standard loop if S = Main_Unit_Entity then return True; elsif Ekind (S) = E_Package and then Is_Child_Unit (S) then return False; else S := Scope (S); end if; end loop; return False; end Entity_Is_In_Main_Unit; --------------------------------- -- Generic_Separately_Compiled -- --------------------------------- function Generic_Separately_Compiled (E : Entity_Id) return Boolean is begin -- We do not generate object files for internal generics, because -- the only thing they would contain is the elaboration boolean, and -- we are careful to elaborate all predefined units first anyway, so -- this boolean is not needed. if Is_Internal_File_Name (Fname => Unit_File_Name (Get_Source_Unit (E)), Renamings_Included => True) then return False; -- All other generic units do generate object files else return True; end if; end Generic_Separately_Compiled; ------------------- -- Get_Code_Unit -- ------------------- function Get_Code_Unit (S : Source_Ptr) return Unit_Number_Type is Source_File : Source_File_Index := Get_Source_File_Index (Top_Level_Location (S)); begin for U in Units.First .. Units.Last loop if Source_Index (U) = Source_File then return U; end if; end loop; -- If not in the table, must be the main source unit, and we just -- have not got it put into the table yet. return Main_Unit; end Get_Code_Unit; function Get_Code_Unit (N : Node_Or_Entity_Id) return Unit_Number_Type is begin return Get_Code_Unit (Sloc (N)); end Get_Code_Unit; ---------------------------- -- Get_Compilation_Switch -- ---------------------------- function Get_Compilation_Switch (N : Pos) return String_Ptr is begin if N <= Compilation_Switches.Last then return Compilation_Switches.Table (N); else return null; end if; end Get_Compilation_Switch; ---------------------------------- -- Get_Cunit_Entity_Unit_Number -- ---------------------------------- function Get_Cunit_Entity_Unit_Number (E : Entity_Id) return Unit_Number_Type is begin for U in Units.First .. Units.Last loop if Cunit_Entity (U) = E then return U; end if; end loop; -- If not in the table, must be the main source unit, and we just -- have not got it put into the table yet. return Main_Unit; end Get_Cunit_Entity_Unit_Number; --------------------------- -- Get_Cunit_Unit_Number -- --------------------------- function Get_Cunit_Unit_Number (N : Node_Id) return Unit_Number_Type is begin for U in Units.First .. Units.Last loop if Cunit (U) = N then return U; end if; end loop; -- If not in the table, must be the main source unit, and we just -- have not got it put into the table yet. return Main_Unit; end Get_Cunit_Unit_Number; --------------------- -- Get_Source_Unit -- --------------------- function Get_Source_Unit (S : Source_Ptr) return Unit_Number_Type is Source_File : Source_File_Index := Get_Source_File_Index (Top_Level_Location (S)); begin Source_File := Get_Source_File_Index (S); while Template (Source_File) /= No_Source_File loop Source_File := Template (Source_File); end loop; for U in Units.First .. Units.Last loop if Source_Index (U) = Source_File then return U; end if; end loop; -- If not in the table, must be the main source unit, and we just -- have not got it put into the table yet. return Main_Unit; end Get_Source_Unit; function Get_Source_Unit (N : Node_Or_Entity_Id) return Unit_Number_Type is begin return Get_Source_Unit (Sloc (N)); end Get_Source_Unit; -------------------------------- -- In_Extended_Main_Code_Unit -- -------------------------------- function In_Extended_Main_Code_Unit (N : Node_Or_Entity_Id) return Boolean is begin if Sloc (N) = Standard_Location then return True; elsif Sloc (N) = No_Location then return False; -- Special case Itypes to test the Sloc of the associated node. The -- reason we do this is for possible calls from gigi after -gnatD -- processing is complete in sprint. This processing updates the -- sloc fields of all nodes in the tree, but itypes are not in the -- tree so their slocs do not get updated. elsif Nkind (N) = N_Defining_Identifier and then Is_Itype (N) then return In_Extended_Main_Code_Unit (Associated_Node_For_Itype (N)); elsif Get_Code_Unit (Sloc (N)) = Get_Code_Unit (Cunit (Main_Unit)) then return True; else -- node may be in spec of main unit return In_Same_Extended_Unit (Sloc (N), Sloc (Cunit (Main_Unit))); end if; end In_Extended_Main_Code_Unit; ---------------------------------- -- In_Extended_Main_Source_Unit -- ---------------------------------- function In_Extended_Main_Source_Unit (N : Node_Or_Entity_Id) return Boolean is begin if Sloc (N) = Standard_Location then return True; elsif Sloc (N) = No_Location then return False; -- Special case Itypes to test the Sloc of the associated node. The -- reason we do this is for possible calls from gigi after -gnatD -- processing is complete in sprint. This processing updates the -- sloc fields of all nodes in the tree, but itypes are not in the -- tree so their slocs do not get updated. elsif Nkind (N) = N_Defining_Identifier and then Is_Itype (N) then return In_Extended_Main_Source_Unit (Associated_Node_For_Itype (N)); else return In_Same_Extended_Unit (Original_Location (Sloc (N)), Original_Location (Sloc (Cunit (Main_Unit)))); end if; end In_Extended_Main_Source_Unit; ----------------------- -- In_Same_Code_Unit -- ----------------------- function In_Same_Code_Unit (N1, N2 : Node_Or_Entity_Id) return Boolean is S1 : constant Source_Ptr := Sloc (N1); S2 : constant Source_Ptr := Sloc (N2); begin if S1 = No_Location or else S2 = No_Location then return False; elsif S1 = Standard_Location then return S2 = Standard_Location; elsif S2 = Standard_Location then return False; end if; return Get_Code_Unit (N1) = Get_Code_Unit (N2); end In_Same_Code_Unit; --------------------------- -- In_Same_Extended_Unit -- --------------------------- function In_Same_Extended_Unit (S1, S2 : Source_Ptr) return Boolean is begin return Check_Same_Extended_Unit (S1, S2) /= No; end In_Same_Extended_Unit; ------------------------- -- In_Same_Source_Unit -- ------------------------- function In_Same_Source_Unit (N1, N2 : Node_Or_Entity_Id) return Boolean is S1 : constant Source_Ptr := Sloc (N1); S2 : constant Source_Ptr := Sloc (N2); begin if S1 = No_Location or else S2 = No_Location then return False; elsif S1 = Standard_Location then return S2 = Standard_Location; elsif S2 = Standard_Location then return False; end if; return Get_Source_Unit (N1) = Get_Source_Unit (N2); end In_Same_Source_Unit; ----------------------------- -- Increment_Serial_Number -- ----------------------------- function Increment_Serial_Number return Nat is TSN : Int renames Units.Table (Current_Sem_Unit).Serial_Number; begin TSN := TSN + 1; return TSN; end Increment_Serial_Number; ---------------- -- Initialize -- ---------------- procedure Initialize is begin Linker_Option_Lines.Init; Load_Stack.Init; Units.Init; Unit_Exception_Table_Present := False; Compilation_Switches.Init; end Initialize; --------------- -- Is_Loaded -- --------------- function Is_Loaded (Uname : Unit_Name_Type) return Boolean is begin for Unum in Units.First .. Units.Last loop if Uname = Unit_Name (Unum) then return True; end if; end loop; return False; end Is_Loaded; --------------- -- Last_Unit -- --------------- function Last_Unit return Unit_Number_Type is begin return Units.Last; end Last_Unit; ---------- -- List -- ---------- procedure List (File_Names_Only : Boolean := False) is separate; ---------- -- Lock -- ---------- procedure Lock is begin Linker_Option_Lines.Locked := True; Load_Stack.Locked := True; Units.Locked := True; Linker_Option_Lines.Release; Load_Stack.Release; Units.Release; end Lock; --------------- -- Num_Units -- --------------- function Num_Units return Nat is begin return Int (Units.Last) - Int (Main_Unit) + 1; end Num_Units; ---------------------------------- -- Replace_Linker_Option_String -- ---------------------------------- procedure Replace_Linker_Option_String (S : String_Id; Match_String : String) is begin if Match_String'Length > 0 then for J in 1 .. Linker_Option_Lines.Last loop String_To_Name_Buffer (Linker_Option_Lines.Table (J).Option); if Match_String = Name_Buffer (1 .. Match_String'Length) then Linker_Option_Lines.Table (J).Option := S; return; end if; end loop; end if; Store_Linker_Option_String (S); end Replace_Linker_Option_String; ---------- -- Sort -- ---------- procedure Sort (Tbl : in out Unit_Ref_Table) is separate; ------------------------------ -- Store_Compilation_Switch -- ------------------------------ procedure Store_Compilation_Switch (Switch : String) is begin Compilation_Switches.Increment_Last; Compilation_Switches.Table (Compilation_Switches.Last) := new String'(Switch); end Store_Compilation_Switch; -------------------------------- -- Store_Linker_Option_String -- -------------------------------- procedure Store_Linker_Option_String (S : String_Id) is begin Linker_Option_Lines.Increment_Last; Linker_Option_Lines.Table (Linker_Option_Lines.Last) := (Option => S, Unit => Current_Sem_Unit); end Store_Linker_Option_String; --------------- -- Tree_Read -- --------------- procedure Tree_Read is N : Nat; S : String_Ptr; begin Units.Tree_Read; -- Read Compilation_Switches table Tree_Read_Int (N); Compilation_Switches.Set_Last (N); for J in 1 .. N loop Tree_Read_Str (S); Compilation_Switches.Table (J) := S; end loop; end Tree_Read; ---------------- -- Tree_Write -- ---------------- procedure Tree_Write is begin Units.Tree_Write; -- Write Compilation_Switches table Tree_Write_Int (Compilation_Switches.Last); for J in 1 .. Compilation_Switches.Last loop Tree_Write_Str (Compilation_Switches.Table (J)); end loop; end Tree_Write; ----------------- -- Version_Get -- ----------------- function Version_Get (U : Unit_Number_Type) return Word_Hex_String is begin return Get_Hex_String (Units.Table (U).Version); end Version_Get; ------------------------ -- Version_Referenced -- ------------------------ procedure Version_Referenced (S : String_Id) is begin Version_Ref.Append (S); end Version_Referenced; end Lib;