------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G N A T B I N D -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2018, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with ALI; use ALI; with ALI.Util; use ALI.Util; with Bcheck; use Bcheck; with Binde; use Binde; with Binderr; use Binderr; with Bindgen; use Bindgen; with Bindusg; with Casing; use Casing; with Csets; with Debug; use Debug; with Fmap; with Namet; use Namet; with Opt; use Opt; with Osint; use Osint; -- Note that we use low-level routines in Osint to read command-line -- arguments. We cannot depend on Ada.Command_Line, because it contains modern -- Ada features that would break bootstrapping with old base compilers. with Osint.B; use Osint.B; with Output; use Output; with Rident; use Rident; with Snames; with Switch; use Switch; with Switch.B; use Switch.B; with Targparm; use Targparm; with Types; use Types; with System.Case_Util; use System.Case_Util; with System.Response_File; with System.OS_Lib; use System.OS_Lib; procedure Gnatbind is Total_Errors : Nat := 0; -- Counts total errors in all files Total_Warnings : Nat := 0; -- Total warnings in all files Main_Lib_File : File_Name_Type; -- Current main library file First_Main_Lib_File : File_Name_Type := No_File; -- The first library file, that should be a main subprogram if neither -n -- nor -z are used. Text : Text_Buffer_Ptr; Output_File_Name_Seen : Boolean := False; Output_File_Name : String_Ptr := new String'(""); Mapping_File : String_Ptr := null; procedure Add_Artificial_ALI_File (Name : String); -- Artificially add ALI file Name in the closure function Gnatbind_Supports_Auto_Init return Boolean; -- Indicates if automatic initialization of elaboration procedure through -- the constructor mechanism is possible on the platform. function Is_Cross_Compiler return Boolean; -- Returns True iff this is a cross-compiler procedure List_Applicable_Restrictions; -- List restrictions that apply to this partition if option taken procedure Scan_Bind_Arg (Argv : String); -- Scan and process binder specific arguments. Argv is a single argument. -- All the one character arguments are still handled by Switch. This -- routine handles -aO -aI and -I-. The lower bound of Argv must be 1. generic with procedure Action (Argv : String); procedure Generic_Scan_Bind_Args; -- Iterate through the args calling Action on each one, taking care of -- response files. procedure Write_Arg (S : String); -- Passed to Generic_Scan_Bind_Args to print args ----------------------------- -- Add_Artificial_ALI_File -- ----------------------------- procedure Add_Artificial_ALI_File (Name : String) is Id : ALI_Id; pragma Warnings (Off, Id); Std_Lib_File : File_Name_Type; -- Standard library begin Name_Len := Name'Length; Name_Buffer (1 .. Name_Len) := Name; Std_Lib_File := Name_Find; Text := Read_Library_Info (Std_Lib_File, True); Id := Scan_ALI (F => Std_Lib_File, T => Text, Ignore_ED => False, Err => False, Ignore_Errors => Debug_Flag_I); Free (Text); end Add_Artificial_ALI_File; --------------------------------- -- Gnatbind_Supports_Auto_Init -- --------------------------------- function Gnatbind_Supports_Auto_Init return Boolean is function gnat_binder_supports_auto_init return Integer; pragma Import (C, gnat_binder_supports_auto_init, "__gnat_binder_supports_auto_init"); begin return gnat_binder_supports_auto_init /= 0; end Gnatbind_Supports_Auto_Init; ----------------------- -- Is_Cross_Compiler -- ----------------------- function Is_Cross_Compiler return Boolean is Cross_Compiler : Integer; pragma Import (C, Cross_Compiler, "__gnat_is_cross_compiler"); begin return Cross_Compiler = 1; end Is_Cross_Compiler; ---------------------------------- -- List_Applicable_Restrictions -- ---------------------------------- procedure List_Applicable_Restrictions is -- Define those restrictions that should be output if the gnatbind -- -r switch is used. Not all restrictions are output for the reasons -- given below in the list, and this array is used to test whether -- the corresponding pragma should be listed. True means that it -- should be listed. Restrictions_To_List : constant array (All_Restrictions) of Boolean := (No_Standard_Allocators_After_Elaboration => False, -- This involves run-time conditions not checkable at compile time No_Anonymous_Allocators => False, -- Premature, since we have not implemented this yet No_Exception_Propagation => False, -- Modifies code resulting in different exception semantics No_Exceptions => False, -- Has unexpected Suppress (All_Checks) effect No_Implicit_Conditionals => False, -- This could modify and pessimize generated code No_Implicit_Dynamic_Code => False, -- This could modify and pessimize generated code No_Implicit_Loops => False, -- This could modify and pessimize generated code No_Recursion => False, -- Not checkable at compile time No_Reentrancy => False, -- Not checkable at compile time Max_Entry_Queue_Length => False, -- Not checkable at compile time Max_Storage_At_Blocking => False, -- Not checkable at compile time No_Implementation_Restrictions => False, -- Listing this one would cause a chicken&egg problem; the program -- doesn't use implementation-defined restrictions, but after -- applying the listed restrictions, it probably WILL use them, -- so No_Implementation_Restrictions will cause an error. -- The following three should not be partition-wide, so the -- following tests are junk to be removed eventually ??? No_Specification_Of_Aspect => False, -- Requires a parameter value, not a count No_Use_Of_Attribute => False, -- Requires a parameter value, not a count No_Use_Of_Pragma => False, -- Requires a parameter value, not a count others => True); Additional_Restrictions_Listed : Boolean := False; -- Set True if we have listed header for restrictions function Restriction_Could_Be_Set (R : Restriction_Id) return Boolean; -- Returns True if the given restriction can be listed as an additional -- restriction that could be set. ------------------------------ -- Restriction_Could_Be_Set -- ------------------------------ function Restriction_Could_Be_Set (R : Restriction_Id) return Boolean is CR : Restrictions_Info renames Cumulative_Restrictions; begin case R is -- Boolean restriction when All_Boolean_Restrictions => -- The condition for listing a boolean restriction as an -- additional restriction that could be set is that it is -- not violated by any unit, and not already set. return CR.Violated (R) = False and then CR.Set (R) = False; -- Parameter restriction when All_Parameter_Restrictions => -- If the restriction is violated and the level of violation is -- unknown, the restriction can definitely not be listed. if CR.Violated (R) and then CR.Unknown (R) then return False; -- We can list the restriction if it is not set elsif not CR.Set (R) then return True; -- We can list the restriction if is set to a greater value -- than the maximum value known for the violation. else return CR.Value (R) > CR.Count (R); end if; -- No other values for R possible when others => raise Program_Error; end case; end Restriction_Could_Be_Set; -- Start of processing for List_Applicable_Restrictions begin -- Loop through restrictions for R in All_Restrictions loop if Restrictions_To_List (R) and then Restriction_Could_Be_Set (R) then if not Additional_Restrictions_Listed then Write_Eol; Write_Line ("-- The following additional restrictions may be applied " & "to this partition:"); Additional_Restrictions_Listed := True; end if; Write_Str ("pragma Restrictions ("); declare S : constant String := Restriction_Id'Image (R); begin Name_Len := S'Length; Name_Buffer (1 .. Name_Len) := S; end; Set_Casing (Mixed_Case); Write_Str (Name_Buffer (1 .. Name_Len)); if R in All_Parameter_Restrictions then Write_Str (" => "); Write_Int (Int (Cumulative_Restrictions.Count (R))); end if; Write_Str (");"); Write_Eol; end if; end loop; end List_Applicable_Restrictions; ------------------- -- Scan_Bind_Arg -- ------------------- procedure Scan_Bind_Arg (Argv : String) is pragma Assert (Argv'First = 1); begin -- Now scan arguments that are specific to the binder and are not -- handled by the common circuitry in Switch. if Opt.Output_File_Name_Present and then not Output_File_Name_Seen then Output_File_Name_Seen := True; if Argv'Length = 0 or else Argv (1) = '-' then Fail ("output File_Name missing after -o"); else Output_File_Name := new String'(Argv); end if; elsif Argv'Length >= 2 and then Argv (1) = '-' then -- -I- if Argv (2 .. Argv'Last) = "I-" then Opt.Look_In_Primary_Dir := False; -- -Idir elsif Argv (2) = 'I' then Add_Src_Search_Dir (Argv (3 .. Argv'Last)); Add_Lib_Search_Dir (Argv (3 .. Argv'Last)); -- -Ldir elsif Argv (2) = 'L' then if Argv'Length >= 3 then Opt.Bind_For_Library := True; Opt.Ada_Init_Name := new String'(Argv (3 .. Argv'Last) & Opt.Ada_Init_Suffix); Opt.Ada_Final_Name := new String'(Argv (3 .. Argv'Last) & Opt.Ada_Final_Suffix); Opt.Ada_Main_Name := new String'(Argv (3 .. Argv'Last) & Opt.Ada_Main_Name_Suffix); -- This option (-Lxxx) implies -n Opt.Bind_Main_Program := False; else Fail ("Prefix of initialization and finalization procedure names " & "missing in -L"); end if; -- -Sin -Slo -Shi -Sxx -Sev elsif Argv'Length = 4 and then Argv (2) = 'S' then declare C1 : Character := Argv (3); C2 : Character := Argv (4); begin -- Fold to upper case if C1 in 'a' .. 'z' then C1 := Character'Val (Character'Pos (C1) - 32); end if; if C2 in 'a' .. 'z' then C2 := Character'Val (Character'Pos (C2) - 32); end if; -- Test valid option and set mode accordingly if C1 = 'E' and then C2 = 'V' then null; elsif C1 = 'I' and then C2 = 'N' then null; elsif C1 = 'L' and then C2 = 'O' then null; elsif C1 = 'H' and then C2 = 'I' then null; elsif (C1 in '0' .. '9' or else C1 in 'A' .. 'F') and then (C2 in '0' .. '9' or else C2 in 'A' .. 'F') then null; -- Invalid -S switch, let Switch give error, set default of IN else Scan_Binder_Switches (Argv); C1 := 'I'; C2 := 'N'; end if; Initialize_Scalars_Mode1 := C1; Initialize_Scalars_Mode2 := C2; end; -- -aIdir elsif Argv'Length >= 3 and then Argv (2 .. 3) = "aI" then Add_Src_Search_Dir (Argv (4 .. Argv'Last)); -- -aOdir elsif Argv'Length >= 3 and then Argv (2 .. 3) = "aO" then Add_Lib_Search_Dir (Argv (4 .. Argv'Last)); -- -nostdlib elsif Argv (2 .. Argv'Last) = "nostdlib" then Opt.No_Stdlib := True; -- -nostdinc elsif Argv (2 .. Argv'Last) = "nostdinc" then Opt.No_Stdinc := True; -- -static elsif Argv (2 .. Argv'Last) = "static" then Opt.Shared_Libgnat := False; -- -shared elsif Argv (2 .. Argv'Last) = "shared" then Opt.Shared_Libgnat := True; -- -F=mapping_file elsif Argv'Length >= 4 and then Argv (2 .. 3) = "F=" then if Mapping_File /= null then Fail ("cannot specify several mapping files"); end if; Mapping_File := new String'(Argv (4 .. Argv'Last)); -- -Mname elsif Argv'Length >= 3 and then Argv (2) = 'M' then if not Is_Cross_Compiler then Write_Line ("gnatbind: -M not expected to be used on native platforms"); end if; Opt.Bind_Alternate_Main_Name := True; Opt.Alternate_Main_Name := new String'(Argv (3 .. Argv'Last)); -- All other options are single character and are handled by -- Scan_Binder_Switches. else Scan_Binder_Switches (Argv); end if; -- Not a switch, so must be a file name (if non-empty) elsif Argv'Length /= 0 then if Argv'Length > 4 and then Argv (Argv'Last - 3 .. Argv'Last) = ".ali" then Add_File (Argv); else Add_File (Argv & ".ali"); end if; end if; end Scan_Bind_Arg; ---------------------------- -- Generic_Scan_Bind_Args -- ---------------------------- procedure Generic_Scan_Bind_Args is Next_Arg : Positive := 1; begin while Next_Arg < Arg_Count loop declare Next_Argv : String (1 .. Len_Arg (Next_Arg)); begin Fill_Arg (Next_Argv'Address, Next_Arg); if Next_Argv'Length > 0 then if Next_Argv (1) = '@' then if Next_Argv'Length > 1 then declare Arguments : constant Argument_List := System.Response_File.Arguments_From (Response_File_Name => Next_Argv (2 .. Next_Argv'Last), Recursive => True, Ignore_Non_Existing_Files => True); begin for J in Arguments'Range loop Action (Arguments (J).all); end loop; end; end if; else Action (Next_Argv); end if; end if; end; Next_Arg := Next_Arg + 1; end loop; end Generic_Scan_Bind_Args; --------------- -- Write_Arg -- --------------- procedure Write_Arg (S : String) is begin Write_Str (" " & S); end Write_Arg; procedure Check_Version_And_Help is new Check_Version_And_Help_G (Bindusg.Display); procedure Put_Bind_Args is new Generic_Scan_Bind_Args (Write_Arg); procedure Scan_Bind_Args is new Generic_Scan_Bind_Args (Scan_Bind_Arg); -- Start of processing for Gnatbind begin -- Set default for Shared_Libgnat option declare Shared_Libgnat_Default : Character; pragma Import (C, Shared_Libgnat_Default, "__gnat_shared_libgnat_default"); SHARED : constant Character := 'H'; STATIC : constant Character := 'T'; begin pragma Assert (Shared_Libgnat_Default = SHARED or else Shared_Libgnat_Default = STATIC); Shared_Libgnat := (Shared_Libgnat_Default = SHARED); end; -- Carry out package initializations. These are initializations which -- might logically be performed at elaboration time, and we decide to be -- consistent. Like elaboration, the order in which these calls are made -- is in some cases important. Csets.Initialize; Snames.Initialize; -- Scan the switches and arguments. Note that Snames must already be -- initialized (for processing of the -V switch). -- First, scan to detect --version and/or --help Check_Version_And_Help ("GNATBIND", "1992"); -- We need to Scan_Bind_Args first, to set Verbose_Mode, so we know whether -- to Put_Bind_Args. Scan_Bind_Args; if Verbose_Mode then declare Command_Name : String (1 .. Len_Arg (0)); begin Fill_Arg (Command_Name'Address, 0); Write_Str (Command_Name); end; Put_Bind_Args; Write_Eol; end if; if Use_Pragma_Linker_Constructor then if Bind_Main_Program then Fail ("switch -a must be used in conjunction with -n or -Lxxx"); elsif not Gnatbind_Supports_Auto_Init then Fail ("automatic initialisation of elaboration not supported on this " & "platform"); end if; end if; -- Test for trailing -o switch if Opt.Output_File_Name_Present and then not Output_File_Name_Seen then Fail ("output file name missing after -o"); end if; -- Output usage if requested if Usage_Requested then Bindusg.Display; end if; -- Check that the binder file specified has extension .adb if Opt.Output_File_Name_Present and then Output_File_Name_Seen then Check_Extensions : declare Length : constant Natural := Output_File_Name'Length; Last : constant Natural := Output_File_Name'Last; begin if Length <= 4 or else Output_File_Name (Last - 3 .. Last) /= ".adb" then Fail ("output file name should have .adb extension"); end if; end Check_Extensions; end if; Osint.Add_Default_Search_Dirs; -- Acquire target parameters Targparm.Get_Target_Parameters; -- Initialize Cumulative_Restrictions with the restrictions on the target -- scanned from the system.ads file. Then as we read ALI files, we will -- accumulate additional restrictions specified in other files. Cumulative_Restrictions := Targparm.Restrictions_On_Target; -- Acquire configurable run-time mode if Configurable_Run_Time_On_Target then Configurable_Run_Time_Mode := True; end if; -- Output copyright notice if in verbose mode if Verbose_Mode then Write_Eol; Display_Version ("GNATBIND", "1995"); end if; -- Output usage information if no arguments if not More_Lib_Files then if Arg_Count = 0 then Bindusg.Display; else Write_Line ("try ""gnatbind --help"" for more information."); end if; Exit_Program (E_Fatal); end if; -- If a mapping file was specified, initialize the file mapping if Mapping_File /= null then Fmap.Initialize (Mapping_File.all); end if; -- The block here is to catch the Unrecoverable_Error exception in the -- case where we exceed the maximum number of permissible errors or some -- other unrecoverable error occurs. begin -- Initialize binder packages Initialize_Binderr; Initialize_ALI; Initialize_ALI_Source; if Verbose_Mode then Write_Eol; end if; -- Input ALI files while More_Lib_Files loop Main_Lib_File := Next_Main_Lib_File; if First_Main_Lib_File = No_File then First_Main_Lib_File := Main_Lib_File; end if; if Verbose_Mode then if Check_Only then Write_Str ("Checking: "); else Write_Str ("Binding: "); end if; Write_Name (Main_Lib_File); Write_Eol; end if; Text := Read_Library_Info (Main_Lib_File, True); declare Id : ALI_Id; pragma Warnings (Off, Id); begin Id := Scan_ALI (F => Main_Lib_File, T => Text, Ignore_ED => False, Err => False, Ignore_Errors => Debug_Flag_I, Directly_Scanned => True); end; Free (Text); end loop; -- No_Run_Time mode if No_Run_Time_Mode then -- Set standard configuration parameters Suppress_Standard_Library_On_Target := True; Configurable_Run_Time_Mode := True; end if; -- For main ALI files, even if they are interfaces, we get their -- dependencies. To be sure, we reset the Interface flag for all main -- ALI files. for Index in ALIs.First .. ALIs.Last loop ALIs.Table (Index).SAL_Interface := False; end loop; -- Add System.Standard_Library to list to ensure that these files are -- included in the bind, even if not directly referenced from Ada code -- This is suppressed if the appropriate targparm switch is set. Be sure -- in any case that System is in the closure, as it may contain linker -- options. Note that it will be automatically added if s-stalib is -- added. if not Suppress_Standard_Library_On_Target then Add_Artificial_ALI_File ("s-stalib.ali"); else Add_Artificial_ALI_File ("system.ali"); end if; -- Load ALIs for all dependent units for Index in ALIs.First .. ALIs.Last loop Read_Withed_ALIs (Index); end loop; -- Quit if some file needs compiling if No_Object_Specified then raise Unrecoverable_Error; end if; -- Quit with message if we had a GNATprove file if GNATprove_Mode_Specified then Error_Msg ("one or more files compiled in GNATprove mode"); raise Unrecoverable_Error; end if; -- Output list of ALI files in closure if Output_ALI_List then if ALI_List_Filename /= null then Set_List_File (ALI_List_Filename.all); end if; for Index in ALIs.First .. ALIs.Last loop declare Full_Afile : constant File_Name_Type := Find_File (ALIs.Table (Index).Afile, Library); begin Write_Name (Full_Afile); Write_Eol; end; end loop; if ALI_List_Filename /= null then Close_List_File; end if; end if; -- Build source file table from the ALI files we have read in Set_Source_Table; -- If there is main program to bind, set Main_Lib_File to the first -- library file, and the name from which to derive the binder generate -- file to the first ALI file. if Bind_Main_Program then Main_Lib_File := First_Main_Lib_File; Set_Current_File_Name_Index (To => 1); end if; -- Check that main library file is a suitable main program if Bind_Main_Program and then ALIs.Table (ALIs.First).Main_Program = None and then not No_Main_Subprogram then Get_Name_String (Units.Table (ALIs.Table (ALIs.First).First_Unit).Uname); declare Unit_Name : String := Name_Buffer (1 .. Name_Len - 2); begin To_Mixed (Unit_Name); Get_Name_String (ALIs.Table (ALIs.First).Sfile); Add_Str_To_Name_Buffer (":1: "); Add_Str_To_Name_Buffer (Unit_Name); Add_Str_To_Name_Buffer (" cannot be used as a main program"); Write_Line (Name_Buffer (1 .. Name_Len)); Errors_Detected := Errors_Detected + 1; end; end if; -- Perform consistency and correctness checks. Disable these in CodePeer -- mode where we want to be more flexible. if not CodePeer_Mode then Check_Duplicated_Subunits; Check_Versions; Check_Consistency; Check_Configuration_Consistency; end if; -- List restrictions that could be applied to this partition if List_Restrictions then List_Applicable_Restrictions; end if; -- Complete bind if no errors if Errors_Detected = 0 then declare Elab_Order : Unit_Id_Table; use Unit_Id_Tables; begin Find_Elab_Order (Elab_Order, First_Main_Lib_File); if Errors_Detected = 0 and then not Check_Only then Gen_Output_File (Output_File_Name.all, Elab_Order => Elab_Order.Table (First .. Last (Elab_Order))); end if; end; end if; Total_Errors := Total_Errors + Errors_Detected; Total_Warnings := Total_Warnings + Warnings_Detected; exception when Unrecoverable_Error => Total_Errors := Total_Errors + Errors_Detected; Total_Warnings := Total_Warnings + Warnings_Detected; end; -- All done. Set the proper exit status. Finalize_Binderr; Namet.Finalize; if Total_Errors > 0 then Exit_Program (E_Errors); elsif Total_Warnings > 0 then Exit_Program (E_Warnings); else -- Do not call Exit_Program (E_Success), so that finalization occurs -- normally. null; end if; end Gnatbind;