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authorcharlet <charlet@138bc75d-0d04-0410-961f-82ee72b054a4>2004-05-27 13:09:26 +0000
committercharlet <charlet@138bc75d-0d04-0410-961f-82ee72b054a4>2004-05-27 13:09:26 +0000
commit9756a6054895622617170db2d3680bb2e753b187 (patch)
tree117c6dde30102543581aa4da898f72f25fea3aa8 /gcc/ada/symbols-vms.adb
parentd9e964624725bb02949954e1beb3559930cbecd8 (diff)
downloadgcc-9756a6054895622617170db2d3680bb2e753b187.tar.gz
2004-05-27 Vincent Celier <celier@gnat.com>
* vms_data.ads: Add new GNAT PRETTY qualifiers /NO_BACKUP and COMMENTS_LAYOUT=UNTOUCHED * symbols-vms.adb, symbols-vms-alpha.adb: Renamed symbols-vms.adb to symbols-vms-alpha.adb 2004-05-27 Thomas Quinot <quinot@act-europe.fr> * sem.ads: Clarify documentation on checks suppression. * einfo.ads (Is_Known_Non_Null): Minor comment typo fix and rephrasing. 2004-05-27 Ed Schonberg <schonberg@gnat.com> * sem_util.adb (Is_Descendent_Of): Examine properly all ancestors in the case of multiple derivations. (Is_Object_Reference): For a selected component, verify that the prefix is itself an object and not a value. * sem_ch12.adb (Same_Instantiated_Constant): New name for Same_Instantiated_Entity. (Same_Instantiated_Variable): Subsidiary to Check_Formal_Package_Instance, to recognize actuals for in-out generic formals that are obtained from a previous formal package. (Instantiate_Subprogram_Body): Emit proper error when generating code and the proper body of a stub is missing. * sem_ch4.adb (Remove_Address_Interpretations): If the operation still has a universal interpretation, do the disambiguation here. * exp_ch4.adb (Expand_N_Type_Conversion, Expand_N_Unchecked_Type_Conversion): Special handling when target type is Address, to avoid typing anomalies when Address is a visible integer type. * exp_ch6.adb (Expand_N_Subprogram_Body): Use Is_Descendent_Of_Address to determine whether a subprogram should not be marked Pure, even when declared in a pure package. 2004-05-27 Jose Ruiz <ruiz@act-europe.fr> * gnat_ugn.texi: Replace pragma Ravenscar by pragma Profile. * gnat_rm.texi: Replace Max_Entry_Queue_Depth by Max_Entry_Queue_Length Document No_Dynamic_Attachment, that supersedes No_Dynamic_Interrupts. Update the documentation about the Ravenscar profile, following the definition found in AI-249. * sem_prag.adb: Use FIFO_Within_Priorities and Ceiling_Locking when setting the Profile (Ravenscar). This must be done in addition to setting the required restrictions. * rtsfind.ads: Add the set of operations defined in package Ada.Interrupts. * exp_ch6.adb: Check whether we are violating the No_Dynamic_Attachment restriction. 2004-05-27 Eric Botcazou <ebotcazou@act-europe.fr> lang-specs.h: Always require -c or -S and always redirect to /dev/null if -gnatc or -gnats is passed. 2004-05-27 Hristian Kirtchev <kirtchev@gnat.com> * sem_prag.adb (Sig_Flags): A Pragma_Unchecked_Union does not count as a significant reference. Warnings are now properly emitted when a discriminated type is not referenced. * lib-xref.adb (Generate_Reference): A deferred constant completion, record representation clause or record type discriminant does not produce a reference to its corresponding entity. Warnings are now properly emitted when deferred constants and record types are not referenced. 2004-05-27 Geert Bosch <bosch@gnat.com> * Makefile.in: Use long version of libm routines on ia64 gnu/linux. Fixes ACATS Annex G tests. 2004-05-27 Robert Dewar <dewar@gnat.com> * rtsfind.adb (RTU_Loaded): Temporary kludge to get past bug of not handling WITH 2004-05-27 Arnaud Charlet <charlet@act-europe.fr> * s-interr.adb (Server_Task): Take into account case of early return from sigwait under e.g. linux. 2004-05-27 Sergey Rybin <rybin@act-europe.fr> * gnat_ugn.texi: Add description for the new gnatpp options: -rnb - replace the original source without creating its backup copy -c0 - do not format comments git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@82324 138bc75d-0d04-0410-961f-82ee72b054a4
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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S Y M B O L S --
--- --
--- B o d y --
--- --
--- Copyright (C) 2003 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. --
--- --
-------------------------------------------------------------------------------
-
--- This is the VMS version of this package
-
-with Ada.Exceptions; use Ada.Exceptions;
-with Ada.Sequential_IO;
-with Ada.Text_IO; use Ada.Text_IO;
-
-package body Symbols is
-
- Case_Sensitive : constant String := "case_sensitive=";
- Symbol_Vector : constant String := "SYMBOL_VECTOR=(";
- Equal_Data : constant String := "=DATA)";
- Equal_Procedure : constant String := "=PROCEDURE)";
- Gsmatch : constant String := "gsmatch=equal,";
-
- Symbol_File_Name : String_Access := null;
- -- Name of the symbol file
-
- Sym_Policy : Policy := Autonomous;
- -- The symbol policy. Set by Initialize
-
- Major_ID : Integer := 1;
- -- The Major ID. May be modified by Initialize if Library_Version is
- -- specified or if it is read from the reference symbol file.
-
- Soft_Major_ID : Boolean := True;
- -- False if library version is specified in procedure Initialize.
- -- When True, Major_ID may be modified if found in the reference symbol
- -- file.
-
- Minor_ID : Natural := 0;
- -- The Minor ID. May be modified if read from the reference symbol file
-
- Soft_Minor_ID : Boolean := True;
- -- False if symbol policy is Autonomous, if library version is specified
- -- in procedure Initialize and is not the same as the major ID read from
- -- the reference symbol file. When True, Minor_ID may be increased in
- -- Compliant symbol policy.
-
- subtype Byte is Character;
- -- Object files are stream of bytes, but some of these bytes, those for
- -- the names of the symbols, are ASCII characters.
-
- package Byte_IO is new Ada.Sequential_IO (Byte);
- use Byte_IO;
-
- type Number is mod 2**16;
- -- 16 bits unsigned number for number of characters
-
- GSD : constant Number := 10;
- -- Code for the Global Symbol Definition section
-
- C_SYM : constant Number := 1;
- -- Code for a Symbol subsection
-
- V_DEF_Mask : constant Number := 2**1;
- V_NORM_Mask : constant Number := 2**6;
-
- File : Byte_IO.File_Type;
- -- Each object file is read as a stream of bytes (characters)
-
- B : Byte;
-
- Number_Of_Characters : Natural := 0;
- -- The number of characters of each section
-
- -- The following variables are used by procedure Process when reading an
- -- object file.
-
- Code : Number := 0;
- Length : Natural := 0;
-
- Dummy : Number;
-
- Nchars : Natural := 0;
- Flags : Number := 0;
-
- Symbol : String (1 .. 255);
- LSymb : Natural;
-
- function Equal (Left, Right : Symbol_Data) return Boolean;
- -- Test for equality of symbols
-
- procedure Get (N : out Number);
- -- Read two bytes from the object file LSB first as unsigned 16 bit number
-
- procedure Get (N : out Natural);
- -- Read two bytes from the object file, LSByte first, as a Natural
-
-
- function Image (N : Integer) return String;
- -- Returns the image of N, without the initial space
-
- -----------
- -- Equal --
- -----------
-
- function Equal (Left, Right : Symbol_Data) return Boolean is
- begin
- return Left.Name /= null and then
- Right.Name /= null and then
- Left.Name.all = Right.Name.all and then
- Left.Kind = Right.Kind and then
- Left.Present = Right.Present;
- end Equal;
-
- ---------
- -- Get --
- ---------
-
- procedure Get (N : out Number) is
- C : Byte;
- LSByte : Number;
- begin
- Read (File, C);
- LSByte := Byte'Pos (C);
- Read (File, C);
- N := LSByte + (256 * Byte'Pos (C));
- end Get;
-
- procedure Get (N : out Natural) is
- Result : Number;
- begin
- Get (Result);
- N := Natural (Result);
- end Get;
-
- -----------
- -- Image --
- -----------
-
- function Image (N : Integer) return String is
- Result : constant String := N'Img;
- begin
- if Result (Result'First) = ' ' then
- return Result (Result'First + 1 .. Result'Last);
-
- else
- return Result;
- end if;
- end Image;
-
- ----------------
- -- Initialize --
- ----------------
-
- procedure Initialize
- (Symbol_File : String;
- Reference : String;
- Symbol_Policy : Policy;
- Quiet : Boolean;
- Version : String;
- Success : out Boolean)
- is
- File : Ada.Text_IO.File_Type;
- Line : String (1 .. 1_000);
- Last : Natural;
-
- begin
- -- Record the symbol file name
-
- Symbol_File_Name := new String'(Symbol_File);
-
- -- Record the policy
-
- Sym_Policy := Symbol_Policy;
-
- -- Record the version (Major ID)
-
- if Version = "" then
- Major_ID := 1;
- Soft_Major_ID := True;
-
- else
- begin
- Major_ID := Integer'Value (Version);
- Soft_Major_ID := False;
-
- if Major_ID <= 0 then
- raise Constraint_Error;
- end if;
-
- exception
- when Constraint_Error =>
- if not Quiet then
- Put_Line ("Version """ & Version & """ is illegal.");
- Put_Line ("On VMS, version must be a positive number");
- end if;
-
- Success := False;
- return;
- end;
- end if;
-
- Minor_ID := 0;
- Soft_Minor_ID := Sym_Policy /= Autonomous;
-
- -- Empty the symbol tables
-
- Symbol_Table.Set_Last (Original_Symbols, 0);
- Symbol_Table.Set_Last (Complete_Symbols, 0);
-
- -- Assume that everything will be fine
-
- Success := True;
-
- -- If policy is not autonomous, attempt to read the reference file
-
- if Sym_Policy /= Autonomous then
- begin
- Open (File, In_File, Reference);
-
- exception
- when Ada.Text_IO.Name_Error =>
- return;
-
- when X : others =>
- if not Quiet then
- Put_Line ("could not open """ & Reference & """");
- Put_Line (Exception_Message (X));
- end if;
-
- Success := False;
- return;
- end;
-
- -- Read line by line
-
- while not End_Of_File (File) loop
- Get_Line (File, Line, Last);
-
- -- Ignore empty lines
-
- if Last = 0 then
- null;
-
- -- Ignore lines starting with "case_sensitive="
-
- elsif Last > Case_Sensitive'Length
- and then Line (1 .. Case_Sensitive'Length) = Case_Sensitive
- then
- null;
-
- -- Line starting with "SYMBOL_VECTOR=("
-
- elsif Last > Symbol_Vector'Length
- and then Line (1 .. Symbol_Vector'Length) = Symbol_Vector
- then
-
- -- SYMBOL_VECTOR=(<symbol>=DATA)
-
- if Last > Symbol_Vector'Length + Equal_Data'Length and then
- Line (Last - Equal_Data'Length + 1 .. Last) = Equal_Data
- then
- Symbol_Table.Increment_Last (Original_Symbols);
- Original_Symbols.Table
- (Symbol_Table.Last (Original_Symbols)) :=
- (Name =>
- new String'(Line (Symbol_Vector'Length + 1 ..
- Last - Equal_Data'Length)),
- Kind => Data,
- Present => True);
-
- -- SYMBOL_VECTOR=(<symbol>=PROCEDURE)
-
- elsif Last > Symbol_Vector'Length + Equal_Procedure'Length
- and then
- Line (Last - Equal_Procedure'Length + 1 .. Last) =
- Equal_Procedure
- then
- Symbol_Table.Increment_Last (Original_Symbols);
- Original_Symbols.Table
- (Symbol_Table.Last (Original_Symbols)) :=
- (Name =>
- new String'(Line (Symbol_Vector'Length + 1 ..
- Last - Equal_Procedure'Length)),
- Kind => Proc,
- Present => True);
-
- -- Anything else is incorrectly formatted
-
- else
- if not Quiet then
- Put_Line ("symbol file """ & Reference &
- """ is incorrectly formatted:");
- Put_Line ("""" & Line (1 .. Last) & """");
- end if;
-
- Close (File);
- Success := False;
- return;
- end if;
-
- -- Lines with "gsmatch=equal,<Major_ID>,<Minor_Id>
-
- elsif Last > Gsmatch'Length
- and then Line (1 .. Gsmatch'Length) = Gsmatch
- then
- declare
- Start : Positive := Gsmatch'Length + 1;
- Finish : Positive := Start;
- OK : Boolean := True;
- ID : Integer;
-
- begin
- loop
- if Line (Finish) not in '0' .. '9'
- or else Finish >= Last - 1
- then
- OK := False;
- exit;
- end if;
-
- exit when Line (Finish + 1) = ',';
-
- Finish := Finish + 1;
- end loop;
-
- if OK then
- ID := Integer'Value (Line (Start .. Finish));
- OK := ID /= 0;
-
- -- If Soft_Major_ID is True, it means that
- -- Library_Version was not specified.
-
- if Soft_Major_ID then
- Major_ID := ID;
-
- -- If the Major ID in the reference file is different
- -- from the Library_Version, then the Minor ID will be 0
- -- because there is no point in taking the Minor ID in
- -- the reference file, or incrementing it. So, we set
- -- Soft_Minor_ID to False, so that we don't modify
- -- the Minor_ID later.
-
- elsif Major_ID /= ID then
- Soft_Minor_ID := False;
- end if;
-
- Start := Finish + 2;
- Finish := Start;
-
- loop
- if Line (Finish) not in '0' .. '9' then
- OK := False;
- exit;
- end if;
-
- exit when Finish = Last;
-
- Finish := Finish + 1;
- end loop;
-
- -- Only set Minor_ID if Soft_Minor_ID is True (see above)
-
- if OK and then Soft_Minor_ID then
- Minor_ID := Integer'Value (Line (Start .. Finish));
- end if;
- end if;
-
- -- If OK is not True, that means the line is not correctly
- -- formatted.
-
- if not OK then
- if not Quiet then
- Put_Line ("symbol file """ & Reference &
- """ is incorrectly formatted");
- Put_Line ("""" & Line (1 .. Last) & """");
- end if;
-
- Close (File);
- Success := False;
- return;
- end if;
- end;
-
- -- Anything else is incorrectly formatted
-
- else
- if not Quiet then
- Put_Line ("unexpected line in symbol file """ &
- Reference & """");
- Put_Line ("""" & Line (1 .. Last) & """");
- end if;
-
- Close (File);
- Success := False;
- return;
- end if;
- end loop;
-
- Close (File);
- end if;
- end Initialize;
-
- -------------
- -- Process --
- -------------
-
- procedure Process
- (Object_File : String;
- Success : out Boolean)
- is
- begin
- -- Open the object file with Byte_IO. Return with Success = False if
- -- this fails.
-
- begin
- Open (File, In_File, Object_File);
- exception
- when others =>
- Put_Line
- ("*** Unable to open object file """ & Object_File & """");
- Success := False;
- return;
- end;
-
- -- Assume that the object file has a correct format
-
- Success := True;
-
- -- Get the different sections one by one from the object file
-
- while not End_Of_File (File) loop
-
- Get (Code);
- Get (Number_Of_Characters);
- Number_Of_Characters := Number_Of_Characters - 4;
-
- -- If this is not a Global Symbol Definition section, skip to the
- -- next section.
-
- if Code /= GSD then
-
- for J in 1 .. Number_Of_Characters loop
- Read (File, B);
- end loop;
-
- else
-
- -- Skip over the next 4 bytes
-
- Get (Dummy);
- Get (Dummy);
- Number_Of_Characters := Number_Of_Characters - 4;
-
- -- Get each subsection in turn
-
- loop
- Get (Code);
- Get (Nchars);
- Get (Dummy);
- Get (Flags);
- Number_Of_Characters := Number_Of_Characters - 8;
- Nchars := Nchars - 8;
-
- -- If this is a symbol and the V_DEF flag is set, get the
- -- symbol.
-
- if Code = C_SYM and then ((Flags and V_DEF_Mask) /= 0) then
- -- First, reach the symbol length
-
- for J in 1 .. 25 loop
- Read (File, B);
- Nchars := Nchars - 1;
- Number_Of_Characters := Number_Of_Characters - 1;
- end loop;
-
- Length := Byte'Pos (B);
- LSymb := 0;
-
- -- Get the symbol characters
-
- for J in 1 .. Nchars loop
- Read (File, B);
- Number_Of_Characters := Number_Of_Characters - 1;
- if Length > 0 then
- LSymb := LSymb + 1;
- Symbol (LSymb) := B;
- Length := Length - 1;
- end if;
- end loop;
-
- -- Create the new Symbol
-
- declare
- S_Data : Symbol_Data;
- begin
- S_Data.Name := new String'(Symbol (1 .. LSymb));
-
- -- The symbol kind (Data or Procedure) depends on the
- -- V_NORM flag.
-
- if (Flags and V_NORM_Mask) = 0 then
- S_Data.Kind := Data;
-
- else
- S_Data.Kind := Proc;
- end if;
-
- -- Put the new symbol in the table
-
- Symbol_Table.Increment_Last (Complete_Symbols);
- Complete_Symbols.Table
- (Symbol_Table.Last (Complete_Symbols)) := S_Data;
- end;
-
- else
- -- As it is not a symbol subsection, skip to the next
- -- subsection.
-
- for J in 1 .. Nchars loop
- Read (File, B);
- Number_Of_Characters := Number_Of_Characters - 1;
- end loop;
- end if;
-
- -- Exit the GSD section when number of characters reaches 0
-
- exit when Number_Of_Characters = 0;
- end loop;
- end if;
- end loop;
-
- -- The object file has been processed, close it
-
- Close (File);
-
- exception
- -- For any exception, output an error message, close the object file
- -- and return with Success = False.
-
- when X : others =>
- Put_Line ("unexpected exception raised while processing """
- & Object_File & """");
- Put_Line (Exception_Information (X));
- Close (File);
- Success := False;
- end Process;
-
- --------------
- -- Finalize --
- --------------
-
- procedure Finalize
- (Quiet : Boolean;
- Success : out Boolean)
- is
- File : Ada.Text_IO.File_Type;
- -- The symbol file
-
- S_Data : Symbol_Data;
- -- A symbol
-
- Cur : Positive := 1;
- -- Most probable index in the Complete_Symbols of the current symbol
- -- in Original_Symbol.
-
- Found : Boolean;
-
- begin
- -- Nothing to be done if Initialize has never been called
-
- if Symbol_File_Name = null then
- Success := False;
-
- else
-
- -- First find if the symbols in the reference symbol file are also
- -- in the object files. Note that this is not done if the policy is
- -- Autonomous, because no reference symbol file has been read.
-
- -- Expect the first symbol in the symbol file to also be the first
- -- in Complete_Symbols.
-
- Cur := 1;
-
- for Index_1 in 1 .. Symbol_Table.Last (Original_Symbols) loop
- S_Data := Original_Symbols.Table (Index_1);
- Found := False;
-
- First_Object_Loop :
- for Index_2 in Cur .. Symbol_Table.Last (Complete_Symbols) loop
- if Equal (S_Data, Complete_Symbols.Table (Index_2)) then
- Cur := Index_2 + 1;
- Complete_Symbols.Table (Index_2).Present := False;
- Found := True;
- exit First_Object_Loop;
- end if;
- end loop First_Object_Loop;
-
- -- If the symbol could not be found between Cur and Last, try
- -- before Cur.
-
- if not Found then
- Second_Object_Loop :
- for Index_2 in 1 .. Cur - 1 loop
- if Equal (S_Data, Complete_Symbols.Table (Index_2)) then
- Cur := Index_2 + 1;
- Complete_Symbols.Table (Index_2).Present := False;
- Found := True;
- exit Second_Object_Loop;
- end if;
- end loop Second_Object_Loop;
- end if;
-
- -- If the symbol is not found, mark it as such in the table
-
- if not Found then
- if (not Quiet) or else Sym_Policy = Controlled then
- Put_Line ("symbol """ & S_Data.Name.all &
- """ is no longer present in the object files");
- end if;
-
- if Sym_Policy = Controlled then
- Success := False;
- return;
-
- elsif Soft_Minor_ID then
- Minor_ID := Minor_ID + 1;
- Soft_Minor_ID := False;
- end if;
-
- Original_Symbols.Table (Index_1).Present := False;
- Free (Original_Symbols.Table (Index_1).Name);
-
- if Soft_Minor_ID then
- Minor_ID := Minor_ID + 1;
- Soft_Minor_ID := False;
- end if;
- end if;
- end loop;
-
- -- Append additional symbols, if any, to the Original_Symbols table
-
- for Index in 1 .. Symbol_Table.Last (Complete_Symbols) loop
- S_Data := Complete_Symbols.Table (Index);
-
- if S_Data.Present then
-
- if Sym_Policy = Controlled then
- Put_Line ("symbol """ & S_Data.Name.all &
- """ is not in the reference symbol file");
- Success := False;
- return;
-
- elsif Soft_Minor_ID then
- Minor_ID := Minor_ID + 1;
- Soft_Minor_ID := False;
- end if;
-
- Symbol_Table.Increment_Last (Original_Symbols);
- Original_Symbols.Table (Symbol_Table.Last (Original_Symbols)) :=
- S_Data;
- Complete_Symbols.Table (Index).Present := False;
- end if;
- end loop;
-
- -- Create the symbol file
-
- Create (File, Ada.Text_IO.Out_File, Symbol_File_Name.all);
-
- Put (File, Case_Sensitive);
- Put_Line (File, "yes");
-
- -- Put a line in the symbol file for each symbol in the symbol table
-
- for Index in 1 .. Symbol_Table.Last (Original_Symbols) loop
- if Original_Symbols.Table (Index).Present then
- Put (File, Symbol_Vector);
- Put (File, Original_Symbols.Table (Index).Name.all);
-
- if Original_Symbols.Table (Index).Kind = Data then
- Put_Line (File, Equal_Data);
-
- else
- Put_Line (File, Equal_Procedure);
- end if;
-
- Free (Original_Symbols.Table (Index).Name);
- end if;
- end loop;
-
- Put (File, Case_Sensitive);
- Put_Line (File, "NO");
-
- -- Put the version IDs
-
- Put (File, Gsmatch);
- Put (File, Image (Major_ID));
- Put (File, ',');
- Put_Line (File, Image (Minor_ID));
-
- -- And we are done
-
- Close (File);
-
- -- Reset both tables
-
- Symbol_Table.Set_Last (Original_Symbols, 0);
- Symbol_Table.Set_Last (Complete_Symbols, 0);
-
- -- Clear the symbol file name
-
- Free (Symbol_File_Name);
-
- Success := True;
- end if;
-
- exception
- when X : others =>
- Put_Line ("unexpected exception raised while finalizing """
- & Symbol_File_Name.all & """");
- Put_Line (Exception_Information (X));
- Success := False;
- end Finalize;
-
-end Symbols;