-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2004 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2007, 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- --
-- 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. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
with Prepcomp;
with Repinfo; use Repinfo;
with Restrict;
+with Rtsfind;
with Sem;
with Sem_Ch8;
with Sem_Ch12;
with Snames;
with Sprint; use Sprint;
with Stringt;
-with Targparm;
+with Targparm; use Targparm;
with Tree_Gen;
with Treepr; use Treepr;
with Ttypes;
-- Compilation unit node for main unit
Main_Kind : Node_Kind;
- -- Kind of main compilation unit node.
+ -- Kind of main compilation unit node
Back_End_Mode : Back_End.Back_End_Mode_Type;
-- Record back end mode
+ procedure Check_Bad_Body;
+ -- Called to check if the unit we are compiling has a bad body
+
+ procedure Check_Rep_Info;
+ -- Called when we are not generating code, to check if -gnatR was requested
+ -- and if so, explain that we will not be honoring the request.
+
+ --------------------
+ -- Check_Bad_Body --
+ --------------------
+
+ procedure Check_Bad_Body is
+ Sname : Unit_Name_Type;
+ Src_Ind : Source_File_Index;
+ Fname : File_Name_Type;
+
+ procedure Bad_Body_Error (Msg : String);
+ -- Issue message for bad body found
+
+ --------------------
+ -- Bad_Body_Error --
+ --------------------
+
+ procedure Bad_Body_Error (Msg : String) is
+ begin
+ Error_Msg_N (Msg, Main_Unit_Node);
+ Error_Msg_File_1 := Fname;
+ Error_Msg_N ("remove incorrect body in file{!", Main_Unit_Node);
+ end Bad_Body_Error;
+
+ -- Start of processing for Check_Bad_Body
+
+ begin
+ -- Nothing to do if we are only checking syntax, because we don't know
+ -- enough to know if we require or forbid a body in this case.
+
+ if Operating_Mode = Check_Syntax then
+ return;
+ end if;
+
+ -- Check for body not allowed
+
+ if (Main_Kind = N_Package_Declaration
+ and then not Body_Required (Main_Unit_Node))
+ or else (Main_Kind = N_Generic_Package_Declaration
+ and then not Body_Required (Main_Unit_Node))
+ or else Main_Kind = N_Package_Renaming_Declaration
+ or else Main_Kind = N_Subprogram_Renaming_Declaration
+ or else Nkind (Original_Node (Unit (Main_Unit_Node)))
+ in N_Generic_Instantiation
+ then
+ Sname := Unit_Name (Main_Unit);
+
+ -- If we do not already have a body name, then get the body name
+ -- (but how can we have a body name here ???)
+
+ if not Is_Body_Name (Sname) then
+ Sname := Get_Body_Name (Sname);
+ end if;
+
+ Fname := Get_File_Name (Sname, Subunit => False);
+ Src_Ind := Load_Source_File (Fname);
+
+ -- Case where body is present and it is not a subunit. Exclude
+ -- the subunit case, because it has nothing to do with the
+ -- package we are compiling. It is illegal for a child unit and a
+ -- subunit with the same expanded name (RM 10.2(9)) to appear
+ -- together in a partition, but there is nothing to stop a
+ -- compilation environment from having both, and the test here
+ -- simply allows that. If there is an attempt to include both in
+ -- a partition, this is diagnosed at bind time. In Ada 83 mode
+ -- this is not a warning case.
+
+ -- Note: if weird file names are being used, we can have
+ -- situation where the file name that supposedly contains body,
+ -- in fact contains a spec, or we can't tell what it contains.
+ -- Skip the error message in these cases.
+
+ -- Also ignore body that is nothing but pragma No_Body; (that's the
+ -- whole point of this pragma, to be used this way and to cause the
+ -- body file to be ignored in this context).
+
+ if Src_Ind /= No_Source_File
+ and then Get_Expected_Unit_Type (Fname) = Expect_Body
+ and then not Source_File_Is_Subunit (Src_Ind)
+ and then not Source_File_Is_No_Body (Src_Ind)
+ then
+ Errout.Finalize;
+
+ Error_Msg_Unit_1 := Sname;
+
+ -- Ada 83 case of a package body being ignored. This is not an
+ -- error as far as the Ada 83 RM is concerned, but it is almost
+ -- certainly not what is wanted so output a warning. Give this
+ -- message only if there were no errors, since otherwise it may
+ -- be incorrect (we may have misinterpreted a junk spec as not
+ -- needing a body when it really does).
+
+ if Main_Kind = N_Package_Declaration
+ and then Ada_Version = Ada_83
+ and then Operating_Mode = Generate_Code
+ and then Distribution_Stub_Mode /= Generate_Caller_Stub_Body
+ and then not Compilation_Errors
+ then
+ Error_Msg_N
+ ("package $$ does not require a body?", Main_Unit_Node);
+ Error_Msg_File_1 := Fname;
+ Error_Msg_N ("body in file{? will be ignored", Main_Unit_Node);
+
+ -- Ada 95 cases of a body file present when no body is
+ -- permitted. This we consider to be an error.
+
+ else
+ -- For generic instantiations, we never allow a body
+
+ if Nkind (Original_Node (Unit (Main_Unit_Node)))
+ in N_Generic_Instantiation
+ then
+ Bad_Body_Error
+ ("generic instantiation for $$ does not allow a body");
+
+ -- A library unit that is a renaming never allows a body
+
+ elsif Main_Kind in N_Renaming_Declaration then
+ Bad_Body_Error
+ ("renaming declaration for $$ does not allow a body!");
+
+ -- Remaining cases are packages and generic packages. Here
+ -- we only do the test if there are no previous errors,
+ -- because if there are errors, they may lead us to
+ -- incorrectly believe that a package does not allow a body
+ -- when in fact it does.
+
+ elsif not Compilation_Errors then
+ if Main_Kind = N_Package_Declaration then
+ Bad_Body_Error
+ ("package $$ does not allow a body!");
+
+ elsif Main_Kind = N_Generic_Package_Declaration then
+ Bad_Body_Error
+ ("generic package $$ does not allow a body!");
+ end if;
+ end if;
+
+ end if;
+ end if;
+ end if;
+ end Check_Bad_Body;
+
+ --------------------
+ -- Check_Rep_Info --
+ --------------------
+
+ procedure Check_Rep_Info is
+ begin
+ if List_Representation_Info /= 0
+ or else List_Representation_Info_Mechanisms
+ then
+ Write_Eol;
+ Write_Str
+ ("cannot generate representation information, no code generated");
+ Write_Eol;
+ Write_Eol;
+ end if;
+ end Check_Rep_Info;
+
+-- Start of processing for Gnat1drv
+
begin
-- This inner block is set up to catch assertion errors and constraint
-- errors. Since the code for handling these errors can cause another
begin
-- Lib.Initialize need to be called before Scan_Compiler_Arguments,
- -- because it initialize a table that is filled by
- -- Scan_Compiler_Arguments.
+ -- because it initializes a table filled by Scan_Compiler_Arguments.
Osint.Initialize;
Fmap.Reset_Tables;
use Sinput;
S : Source_File_Index;
- N : Name_Id;
+ N : File_Name_Type;
begin
Name_Buffer (1 .. 10) := "system.ads";
("cannot locate file system.ads");
raise Unrecoverable_Error;
- -- Here if system.ads successfully read. Remember its source index.
+ -- Remember source index of system.ads (which was read successfully)
else
System_Source_File_Index := S;
end if;
Targparm.Get_Target_Parameters
- (System_Text => Source_Text (S),
+ (System_Text => Source_Text (S),
Source_First => Source_First (S),
- Source_Last => Source_Last (S));
+ Source_Last => Source_Last (S));
-- Acquire configuration pragma information from Targparm
Configurable_Run_Time_Mode := True;
end if;
- -- Output copyright notice if full list mode
+ -- Set -gnatR3m mode if debug flag A set
- if (Verbose_Mode or Full_List)
- and then (not Debug_Flag_7)
+ if Debug_Flag_AA then
+ Back_Annotate_Rep_Info := True;
+ List_Representation_Info := 1;
+ List_Representation_Info_Mechanisms := True;
+ end if;
+
+ -- Output copyright notice if full list mode unless we have a list
+ -- file, in which case we defer this so that it is output in the file
+
+ if (Verbose_Mode or else (Full_List and then Full_List_File_Name = null))
+ and then not Debug_Flag_7
then
Write_Eol;
Write_Str ("GNAT ");
Write_Str (Gnat_Version_String);
- Write_Str (" Copyright 1992-2004 Free Software Foundation, Inc.");
+ Write_Eol;
+ Write_Str ("Copyright 1992-" &
+ Current_Year &
+ ", Free Software Foundation, Inc.");
Write_Eol;
end if;
if Targparm.ZCX_By_Default_On_Target then
if Targparm.GCC_ZCX_Support_On_Target then
- Exception_Mechanism := Back_End_ZCX_Exceptions;
- else
- Exception_Mechanism := Front_End_ZCX_Exceptions;
- end if;
- end if;
-
- -- We take the command line exception mechanism into account
-
- if Opt.Zero_Cost_Exceptions_Set then
- if Opt.Zero_Cost_Exceptions_Val = False then
- Exception_Mechanism := Front_End_Setjmp_Longjmp_Exceptions;
-
- elsif Debug_Flag_XX then
- Exception_Mechanism := Front_End_ZCX_Exceptions;
-
- elsif Targparm.GCC_ZCX_Support_On_Target then
- Exception_Mechanism := Back_End_ZCX_Exceptions;
-
- elsif Targparm.Front_End_ZCX_Support_On_Target then
- Exception_Mechanism := Front_End_ZCX_Exceptions;
-
+ Exception_Mechanism := Back_End_Exceptions;
else
Osint.Fail
("Zero Cost Exceptions not supported on this target");
Suppress_Options (Overflow_Check) := True;
end if;
- -- Check we have exactly one source file, this happens only in
- -- the case where the driver is called directly, it cannot happen
- -- when gnat1 is invoked from gcc in the normal case.
+ -- Check we do not have more than one source file, this happens only in
+ -- the case where the driver is called directly, it cannot happen when
+ -- gnat1 is invoked from gcc in the normal case.
if Osint.Number_Of_Files /= 1 then
Usage;
Original_Operating_Mode := Operating_Mode;
Frontend;
- Main_Unit_Node := Cunit (Main_Unit);
- Main_Kind := Nkind (Unit (Main_Unit_Node));
-
- -- Check for suspicious or incorrect body present if we are doing
- -- semantic checking. We omit this check in syntax only mode, because
- -- in that case we do not know if we need a body or not.
-
- if Operating_Mode /= Check_Syntax
- and then
- ((Main_Kind = N_Package_Declaration
- and then not Body_Required (Main_Unit_Node))
- or else (Main_Kind = N_Generic_Package_Declaration
- and then not Body_Required (Main_Unit_Node))
- or else Main_Kind = N_Package_Renaming_Declaration
- or else Main_Kind = N_Subprogram_Renaming_Declaration
- or else Nkind (Original_Node (Unit (Main_Unit_Node)))
- in N_Generic_Instantiation)
- then
- declare
- Sname : Unit_Name_Type := Unit_Name (Main_Unit);
- Src_Ind : Source_File_Index;
- Fname : File_Name_Type;
-
- procedure Bad_Body (Msg : String);
- -- Issue message for bad body found
-
- procedure Bad_Body (Msg : String) is
- begin
- Error_Msg_N (Msg, Main_Unit_Node);
- Error_Msg_Name_1 := Fname;
- Error_Msg_N
- ("remove incorrect body in file{!", Main_Unit_Node);
- end Bad_Body;
-
- begin
- Sname := Unit_Name (Main_Unit);
- -- If we do not already have a body name, then get the body
- -- name (but how can we have a body name here ???)
+ -- Exit with errors if the main source could not be parsed
- if not Is_Body_Name (Sname) then
- Sname := Get_Body_Name (Sname);
- end if;
-
- Fname := Get_File_Name (Sname, Subunit => False);
- Src_Ind := Load_Source_File (Fname);
-
- -- Case where body is present and it is not a subunit. Exclude
- -- the subunit case, because it has nothing to do with the
- -- package we are compiling. It is illegal for a child unit
- -- and a subunit with the same expanded name (RM 10.2(9)) to
- -- appear together in a partition, but there is nothing to
- -- stop a compilation environment from having both, and the
- -- test here simply allows that. If there is an attempt to
- -- include both in a partition, this is diagnosed at bind time.
- -- In Ada 83 mode this is not a warning case.
-
- -- Note: if weird file names are being used, we can have a
- -- situation where the file name that supposedly contains a
- -- body, in fact contains a spec, or we can't tell what it
- -- contains. Skip the error message in these cases.
-
- if Src_Ind /= No_Source_File
- and then Get_Expected_Unit_Type (Fname) = Expect_Body
- and then not Source_File_Is_Subunit (Src_Ind)
- then
- Error_Msg_Name_1 := Sname;
-
- -- Ada 83 case of a package body being ignored. This is not
- -- an error as far as the Ada 83 RM is concerned, but it is
- -- almost certainly not what is wanted so output a warning.
- -- Give this message only if there were no errors, since
- -- otherwise it may be incorrect (we may have misinterpreted
- -- a junk spec as not needing a body when it really does).
-
- if Main_Kind = N_Package_Declaration
- and then Ada_Version = Ada_83
- and then Operating_Mode = Generate_Code
- and then Distribution_Stub_Mode /= Generate_Caller_Stub_Body
- and then not Compilation_Errors
- then
- Error_Msg_N
- ("package % does not require a body?!", Main_Unit_Node);
- Error_Msg_Name_1 := Fname;
- Error_Msg_N
- ("body in file{?! will be ignored", Main_Unit_Node);
-
- -- Ada 95 cases of a body file present when no body is
- -- permitted. This we consider to be an error.
-
- else
- -- For generic instantiations, we never allow a body
-
- if Nkind (Original_Node (Unit (Main_Unit_Node)))
- in N_Generic_Instantiation
- then
- Bad_Body
- ("generic instantiation for % does not allow a body");
-
- -- A library unit that is a renaming never allows a body
-
- elsif Main_Kind in N_Renaming_Declaration then
- Bad_Body
- ("renaming declaration for % does not allow a body!");
-
- -- Remaining cases are packages and generic packages.
- -- Here we only do the test if there are no previous
- -- errors, because if there are errors, they may lead
- -- us to incorrectly believe that a package does not
- -- allow a body when in fact it does.
-
- elsif not Compilation_Errors then
- if Main_Kind = N_Package_Declaration then
- Bad_Body ("package % does not allow a body!");
-
- elsif Main_Kind = N_Generic_Package_Declaration then
- Bad_Body ("generic package % does not allow a body!");
- end if;
- end if;
-
- end if;
- end if;
- end;
+ if Sinput.Main_Source_File = No_Source_File then
+ Errout.Finalize;
+ Errout.Output_Messages;
+ Exit_Program (E_Errors);
end if;
+ Main_Unit_Node := Cunit (Main_Unit);
+ Main_Kind := Nkind (Unit (Main_Unit_Node));
+ Check_Bad_Body;
+
-- Exit if compilation errors detected
+ Errout.Finalize;
+
if Compilation_Errors then
Treepr.Tree_Dump;
Sem_Ch13.Validate_Unchecked_Conversions;
- Errout.Finalize;
+ Errout.Output_Messages;
Namet.Finalize;
-- Generate ALI file if specially requested
Exit_Program (E_Errors);
end if;
- -- Set Generate_Code on main unit and its spec. We do this even if
- -- are not generating code, since Lib-Writ uses this to determine
- -- which units get written in the ali file.
+ -- Set Generate_Code on main unit and its spec. We do this even if are
+ -- not generating code, since Lib-Writ uses this to determine which
+ -- units get written in the ali file.
Set_Generate_Code (Main_Unit);
if Original_Operating_Mode = Check_Syntax then
Treepr.Tree_Dump;
Errout.Finalize;
+ Errout.Output_Messages;
Tree_Gen;
Namet.Finalize;
- Exit_Program (E_Success);
+ Check_Rep_Info;
+
+ -- Use a goto instead of calling Exit_Program so that finalization
+ -- occurs normally.
+
+ goto End_Of_Program;
elsif Original_Operating_Mode = Check_Semantics then
Back_End_Mode := Declarations_Only;
-- be generated (i.e. no -gnatc or -gnats switch was used). Check if
-- we can in fact satisfy this request.
- -- Cannot generate code if someone has turned off code generation
- -- for any reason at all. We will try to figure out a reason below.
+ -- Cannot generate code if someone has turned off code generation for
+ -- any reason at all. We will try to figure out a reason below.
elsif Operating_Mode /= Generate_Code then
Back_End_Mode := Skip;
- -- We can generate code for a subprogram body unless there were
- -- missing subunits. Note that we always generate code for all
- -- generic units (a change from some previous versions of GNAT).
+ -- We can generate code for a subprogram body unless there were missing
+ -- subunits. Note that we always generate code for all generic units (a
+ -- change from some previous versions of GNAT).
elsif Main_Kind = N_Subprogram_Body
and then not Subunits_Missing
Back_End_Mode := Skip;
end if;
- -- At this stage Call_Back_End is set to indicate if the backend
- -- should be called to generate code. If it is not set, then code
- -- generation has been turned off, even though code was requested
- -- by the original command. This is not an error from the user
- -- point of view, but it is an error from the point of view of
- -- the gcc driver, so we must exit with an error status.
+ -- At this stage Call_Back_End is set to indicate if the backend should
+ -- be called to generate code. If it is not set, then code generation
+ -- has been turned off, even though code was requested by the original
+ -- command. This is not an error from the user point of view, but it is
+ -- an error from the point of view of the gcc driver, so we must exit
+ -- with an error status.
- -- We generate an informative message (from the gcc point of view,
- -- it is an error message, but from the users point of view this
- -- is not an error, just a consequence of compiling something that
- -- cannot generate code).
+ -- We generate an informative message (from the gcc point of view, it
+ -- is an error message, but from the users point of view this is not an
+ -- error, just a consequence of compiling something that cannot
+ -- generate code).
if Back_End_Mode = Skip then
Write_Str ("cannot generate code for ");
Sem_Ch13.Validate_Unchecked_Conversions;
Errout.Finalize;
+ Errout.Output_Messages;
Treepr.Tree_Dump;
Tree_Gen;
Write_ALI (Object => False);
Namet.Finalize;
+ Check_Rep_Info;
-- Exit program with error indication, to kill object file
-- enabled, because the front end determines representations.
-- Annotation is also suppressed in the case of compiling for
- -- the Java VM, since representations are largely symbolic there.
+ -- a VM, since representations are largely symbolic there.
if Back_End_Mode = Declarations_Only
- and then (not (Back_Annotate_Rep_Info or Debug_Flag_AA)
+ and then (not Back_Annotate_Rep_Info
or else Main_Kind = N_Subunit
or else Targparm.Frontend_Layout_On_Target
- or else Hostparm.Java_VM)
+ or else Targparm.VM_Target /= No_VM)
then
Sem_Ch13.Validate_Unchecked_Conversions;
Errout.Finalize;
+ Errout.Output_Messages;
Write_ALI (Object => False);
Tree_Dump;
Tree_Gen;
Namet.Finalize;
+ Check_Rep_Info;
return;
end if;
- -- Ensure that we properly register a dependency on system.ads,
- -- since even if we do not semantically depend on this, Targparm
- -- has read system parameters from the system.ads file.
+ -- Ensure that we properly register a dependency on system.ads, since
+ -- even if we do not semantically depend on this, Targparm has read
+ -- system parameters from the system.ads file.
Lib.Writ.Ensure_System_Dependency;
-- Here we call the back end to generate the output code
+ Generating_Code := True;
Back_End.Call_Back_End (Back_End_Mode);
- -- Once the backend is complete, we unlock the names table. This
- -- call allows a few extra entries, needed for example for the file
- -- name for the library file output.
+ -- Once the backend is complete, we unlock the names table. This call
+ -- allows a few extra entries, needed for example for the file name for
+ -- the library file output.
Namet.Unlock;
- -- Validate unchecked conversions (using the values for size
- -- and alignment annotated by the backend where possible).
+ -- Validate unchecked conversions (using the values for size and
+ -- alignment annotated by the backend where possible).
Sem_Ch13.Validate_Unchecked_Conversions;
- -- Now we complete output of errors, rep info and the tree info.
- -- These are delayed till now, since it is perfectly possible for
- -- gigi to generate errors, modify the tree (in particular by setting
- -- flags indicating that elaboration is required, and also to back
- -- annotate representation information for List_Rep_Info.
+ -- Now we complete output of errors, rep info and the tree info. These
+ -- are delayed till now, since it is perfectly possible for gigi to
+ -- generate errors, modify the tree (in particular by setting flags
+ -- indicating that elaboration is required, and also to back annotate
+ -- representation information for List_Rep_Info.
Errout.Finalize;
+ Errout.Output_Messages;
List_Rep_Info;
-- Only write the library if the backend did not generate any error
Write_ALI (Object => (Back_End_Mode = Generate_Object));
- -- Generate the ASIS tree after writing the ALI file, since in
- -- ASIS mode, Write_ALI may in fact result in further tree
- -- decoration from the original tree file. Note that we dump
- -- the tree just before generating it, so that the dump will
- -- exactly reflect what is written out.
+ -- Generate the ASIS tree after writing the ALI file, since in ASIS
+ -- mode, Write_ALI may in fact result in further tree decoration from
+ -- the original tree file. Note that we dump the tree just before
+ -- generating it, so that the dump will exactly reflect what is written
+ -- out.
Treepr.Tree_Dump;
Tree_Gen;
exception
-- Handle fatal internal compiler errors
+ when Rtsfind.RE_Not_Available =>
+ Comperr.Compiler_Abort ("RE_Not_Available");
+
when System.Assertions.Assert_Failure =>
Comperr.Compiler_Abort ("Assert_Failure");
when Storage_Error =>
- -- Assume this is a bug. If it is real, the message will in
- -- any case say Storage_Error, giving a strong hint!
+ -- Assume this is a bug. If it is real, the message will in any case
+ -- say Storage_Error, giving a strong hint!
Comperr.Compiler_Abort ("Storage_Error");
end;
--- The outer exception handles an unrecoverable error
+ <<End_Of_Program>>
+ null;
+
+ -- The outer exception handles an unrecoverable error
exception
when Unrecoverable_Error =>
Errout.Finalize;
+ Errout.Output_Messages;
Set_Standard_Error;
Write_Str ("compilation abandoned");
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