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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- E X P _ D B U G --
--- --
--- B o d y --
--- --
--- Copyright (C) 1996-2008, 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 Alloc; use Alloc;
-with Atree; use Atree;
-with Debug; use Debug;
-with Einfo; use Einfo;
-with Nlists; use Nlists;
-with Nmake; use Nmake;
-with Opt; use Opt;
-with Output; use Output;
-with Sem_Eval; use Sem_Eval;
-with Sem_Util; use Sem_Util;
-with Sinfo; use Sinfo;
-with Stand; use Stand;
-with Stringt; use Stringt;
-with Table;
-with Tbuild; use Tbuild;
-with Urealp; use Urealp;
-
-package body Exp_Dbug is
-
- -- The following table is used to queue up the entities passed as
- -- arguments to Qualify_Entity_Names for later processing when
- -- Qualify_All_Entity_Names is called.
-
- package Name_Qualify_Units is new Table.Table (
- Table_Component_Type => Node_Id,
- Table_Index_Type => Nat,
- Table_Low_Bound => 1,
- Table_Initial => Alloc.Name_Qualify_Units_Initial,
- Table_Increment => Alloc.Name_Qualify_Units_Increment,
- Table_Name => "Name_Qualify_Units");
-
- --------------------------------
- -- Use of Qualification Flags --
- --------------------------------
-
- -- There are two flags used to keep track of qualification of entities
-
- -- Has_Fully_Qualified_Name
- -- Has_Qualified_Name
-
- -- The difference between these is as follows. Has_Qualified_Name is
- -- set to indicate that the name has been qualified as required by the
- -- spec of this package. As described there, this may involve the full
- -- qualification for the name, but for some entities, notably procedure
- -- local variables, this full qualification is not required.
-
- -- The flag Has_Fully_Qualified_Name is set if indeed the name has been
- -- fully qualified in the Ada sense. If Has_Fully_Qualified_Name is set,
- -- then Has_Qualified_Name is also set, but the other way round is not
- -- the case.
-
- -- Consider the following example:
-
- -- with ...
- -- procedure X is
- -- B : Ddd.Ttt;
- -- procedure Y is ..
-
- -- Here B is a procedure local variable, so it does not need fully
- -- qualification. The flag Has_Qualified_Name will be set on the
- -- first attempt to qualify B, to indicate that the job is done
- -- and need not be redone.
-
- -- But Y is qualified as x__y, since procedures are always fully
- -- qualified, so the first time that an attempt is made to qualify
- -- the name y, it will be replaced by x__y, and both flags are set.
-
- -- Why the two flags? Well there are cases where we derive type names
- -- from object names. As noted in the spec, type names are always
- -- fully qualified. Suppose for example that the backend has to build
- -- a padded type for variable B. then it will construct the PAD name
- -- from B, but it requires full qualification, so the fully qualified
- -- type name will be x__b___PAD. The two flags allow the circuit for
- -- building this name to realize efficiently that b needs further
- -- qualification.
-
- --------------------
- -- Homonym_Suffix --
- --------------------
-
- -- The string defined here (and its associated length) is used to
- -- gather the homonym string that will be appended to Name_Buffer
- -- when the name is complete. Strip_Suffixes appends to this string
- -- as does Append_Homonym_Number, and Output_Homonym_Numbers_Suffix
- -- appends the string to the end of Name_Buffer.
-
- Homonym_Numbers : String (1 .. 256);
- Homonym_Len : Natural := 0;
-
- ----------------------
- -- Local Procedures --
- ----------------------
-
- procedure Add_Uint_To_Buffer (U : Uint);
- -- Add image of universal integer to Name_Buffer, updating Name_Len
-
- procedure Add_Real_To_Buffer (U : Ureal);
- -- Add nnn_ddd to Name_Buffer, where nnn and ddd are integer values of
- -- the normalized numerator and denominator of the given real value.
-
- procedure Append_Homonym_Number (E : Entity_Id);
- -- If the entity E has homonyms in the same scope, then make an entry
- -- in the Homonym_Numbers array, bumping Homonym_Count accordingly.
-
- function Bounds_Match_Size (E : Entity_Id) return Boolean;
- -- Determine whether the bounds of E match the size of the type. This is
- -- used to determine whether encoding is required for a discrete type.
-
- procedure Output_Homonym_Numbers_Suffix;
- -- If homonym numbers are stored, then output them into Name_Buffer
-
- procedure Prepend_String_To_Buffer (S : String);
- -- Prepend given string to the contents of the string buffer, updating
- -- the value in Name_Len (i.e. string is added at start of buffer).
-
- procedure Prepend_Uint_To_Buffer (U : Uint);
- -- Prepend image of universal integer to Name_Buffer, updating Name_Len
-
- procedure Qualify_Entity_Name (Ent : Entity_Id);
- -- If not already done, replaces the Chars field of the given entity
- -- with the appropriate fully qualified name.
-
- procedure Strip_Suffixes (BNPE_Suffix_Found : in out Boolean);
- -- Given an qualified entity name in Name_Buffer, remove any plain X or
- -- X{nb} qualification suffix. The contents of Name_Buffer is not changed
- -- but Name_Len may be adjusted on return to remove the suffix. If a
- -- BNPE suffix is found and stripped, then BNPE_Suffix_Found is set to
- -- True. If no suffix is found, then BNPE_Suffix_Found is not modified.
- -- This routine also searches for a homonym suffix, and if one is found
- -- it is also stripped, and the entries are added to the global homonym
- -- list (Homonym_Numbers) so that they can later be put back.
-
- ------------------------
- -- Add_Real_To_Buffer --
- ------------------------
-
- procedure Add_Real_To_Buffer (U : Ureal) is
- begin
- Add_Uint_To_Buffer (Norm_Num (U));
- Add_Str_To_Name_Buffer ("_");
- Add_Uint_To_Buffer (Norm_Den (U));
- end Add_Real_To_Buffer;
-
- ------------------------
- -- Add_Uint_To_Buffer --
- ------------------------
-
- procedure Add_Uint_To_Buffer (U : Uint) is
- begin
- if U < 0 then
- Add_Uint_To_Buffer (-U);
- Add_Char_To_Name_Buffer ('m');
- else
- UI_Image (U, Decimal);
- Add_Str_To_Name_Buffer (UI_Image_Buffer (1 .. UI_Image_Length));
- end if;
- end Add_Uint_To_Buffer;
-
- ---------------------------
- -- Append_Homonym_Number --
- ---------------------------
-
- procedure Append_Homonym_Number (E : Entity_Id) is
-
- procedure Add_Nat_To_H (Nr : Nat);
- -- Little procedure to append Nr to Homonym_Numbers
-
- ------------------
- -- Add_Nat_To_H --
- ------------------
-
- procedure Add_Nat_To_H (Nr : Nat) is
- begin
- if Nr >= 10 then
- Add_Nat_To_H (Nr / 10);
- end if;
-
- Homonym_Len := Homonym_Len + 1;
- Homonym_Numbers (Homonym_Len) :=
- Character'Val (Nr mod 10 + Character'Pos ('0'));
- end Add_Nat_To_H;
-
- -- Start of processing for Append_Homonym_Number
-
- begin
- if Has_Homonym (E) then
- declare
- H : Entity_Id := Homonym (E);
- Nr : Nat := 1;
-
- begin
- while Present (H) loop
- if Scope (H) = Scope (E) then
- Nr := Nr + 1;
- end if;
-
- H := Homonym (H);
- end loop;
-
- if Homonym_Len > 0 then
- Homonym_Len := Homonym_Len + 1;
- Homonym_Numbers (Homonym_Len) := '_';
- end if;
-
- Add_Nat_To_H (Nr);
- end;
- end if;
- end Append_Homonym_Number;
-
- -----------------------
- -- Bounds_Match_Size --
- -----------------------
-
- function Bounds_Match_Size (E : Entity_Id) return Boolean is
- Siz : Uint;
-
- begin
- if not Is_OK_Static_Subtype (E) then
- return False;
-
- elsif Is_Integer_Type (E)
- and then Subtypes_Statically_Match (E, Base_Type (E))
- then
- return True;
-
- -- Here we check if the static bounds match the natural size, which is
- -- the size passed through with the debugging information. This is the
- -- Esize rounded up to 8, 16, 32 or 64 as appropriate.
-
- else
- declare
- Umark : constant Uintp.Save_Mark := Uintp.Mark;
- Result : Boolean;
-
- begin
- if Esize (E) <= 8 then
- Siz := Uint_8;
- elsif Esize (E) <= 16 then
- Siz := Uint_16;
- elsif Esize (E) <= 32 then
- Siz := Uint_32;
- else
- Siz := Uint_64;
- end if;
-
- if Is_Modular_Integer_Type (E) or else Is_Enumeration_Type (E) then
- Result :=
- Expr_Rep_Value (Type_Low_Bound (E)) = 0
- and then
- 2 ** Siz - Expr_Rep_Value (Type_High_Bound (E)) = 1;
-
- else
- Result :=
- Expr_Rep_Value (Type_Low_Bound (E)) + 2 ** (Siz - 1) = 0
- and then
- 2 ** (Siz - 1) - Expr_Rep_Value (Type_High_Bound (E)) = 1;
- end if;
-
- Release (Umark);
- return Result;
- end;
- end if;
- end Bounds_Match_Size;
-
- --------------------------------
- -- Debug_Renaming_Declaration --
- --------------------------------
-
- function Debug_Renaming_Declaration (N : Node_Id) return Node_Id is
- Loc : constant Source_Ptr := Sloc (N);
- Ent : constant Node_Id := Defining_Entity (N);
- Nam : constant Node_Id := Name (N);
- Ren : Node_Id;
- Typ : Entity_Id;
- Obj : Entity_Id;
- Res : Node_Id;
-
- function Output_Subscript (N : Node_Id; S : String) return Boolean;
- -- Outputs a single subscript value as ?nnn (subscript is compile time
- -- known value with value nnn) or as ?e (subscript is local constant
- -- with name e), where S supplies the proper string to use for ?.
- -- Returns False if the subscript is not of an appropriate type to
- -- output in one of these two forms. The result is prepended to the
- -- name stored in Name_Buffer.
-
- ----------------------
- -- Output_Subscript --
- ----------------------
-
- function Output_Subscript (N : Node_Id; S : String) return Boolean is
- begin
- if Compile_Time_Known_Value (N) then
- Prepend_Uint_To_Buffer (Expr_Value (N));
-
- elsif Nkind (N) = N_Identifier
- and then Scope (Entity (N)) = Scope (Ent)
- and then Ekind (Entity (N)) = E_Constant
- then
- Prepend_String_To_Buffer (Get_Name_String (Chars (Entity (N))));
-
- else
- return False;
- end if;
-
- Prepend_String_To_Buffer (S);
- return True;
- end Output_Subscript;
-
- -- Start of processing for Debug_Renaming_Declaration
-
- begin
- if not Comes_From_Source (N)
- and then not Needs_Debug_Info (Ent)
- then
- return Empty;
- end if;
-
- -- Get renamed entity and compute suffix
-
- Name_Len := 0;
- Ren := Nam;
- loop
- case Nkind (Ren) is
-
- when N_Identifier =>
- exit;
-
- when N_Expanded_Name =>
-
- -- The entity field for an N_Expanded_Name is on the expanded
- -- name node itself, so we are done here too.
-
- exit;
-
- when N_Selected_Component =>
- Prepend_String_To_Buffer
- (Get_Name_String (Chars (Selector_Name (Ren))));
- Prepend_String_To_Buffer ("XR");
- Ren := Prefix (Ren);
-
- when N_Indexed_Component =>
- declare
- X : Node_Id := Last (Expressions (Ren));
-
- begin
- while Present (X) loop
- if not Output_Subscript (X, "XS") then
- Set_Materialize_Entity (Ent);
- return Empty;
- end if;
-
- Prev (X);
- end loop;
- end;
-
- Ren := Prefix (Ren);
-
- when N_Slice =>
-
- Typ := Etype (First_Index (Etype (Nam)));
-
- if not Output_Subscript (Type_High_Bound (Typ), "XS") then
- Set_Materialize_Entity (Ent);
- return Empty;
- end if;
-
- if not Output_Subscript (Type_Low_Bound (Typ), "XL") then
- Set_Materialize_Entity (Ent);
- return Empty;
- end if;
-
- Ren := Prefix (Ren);
-
- when N_Explicit_Dereference =>
- Set_Materialize_Entity (Ent);
- Prepend_String_To_Buffer ("XA");
- Ren := Prefix (Ren);
-
- -- For now, anything else simply results in no translation
-
- when others =>
- Set_Materialize_Entity (Ent);
- return Empty;
- end case;
- end loop;
-
- Prepend_String_To_Buffer ("___XE");
-
- -- Include the designation of the form of renaming
-
- case Nkind (N) is
- when N_Object_Renaming_Declaration =>
- Prepend_String_To_Buffer ("___XR");
-
- when N_Exception_Renaming_Declaration =>
- Prepend_String_To_Buffer ("___XRE");
-
- when N_Package_Renaming_Declaration =>
- Prepend_String_To_Buffer ("___XRP");
-
- when others =>
- return Empty;
- end case;
-
- -- Add the name of the renaming entity to the front
-
- Prepend_String_To_Buffer (Get_Name_String (Chars (Ent)));
-
- -- If it is a child unit create a fully qualified name, to disambiguate
- -- multiple child units with the same name and different parents.
-
- if Nkind (N) = N_Package_Renaming_Declaration
- and then Is_Child_Unit (Ent)
- then
- Prepend_String_To_Buffer ("__");
- Prepend_String_To_Buffer
- (Get_Name_String (Chars (Scope (Ent))));
- end if;
-
- -- Create the special object whose name is the debug encoding for the
- -- renaming declaration.
-
- -- For now, the object name contains the suffix encoding for the renamed
- -- object, but not the name of the leading entity. The object is linked
- -- the renamed entity using the Debug_Renaming_Link field. Then the
- -- Qualify_Entity_Name procedure uses this link to create the proper
- -- fully qualified name.
-
- -- The reason we do things this way is that we really need to copy the
- -- qualification of the renamed entity, and it is really much easier to
- -- do this after the renamed entity has itself been fully qualified.
-
- Obj := Make_Defining_Identifier (Loc, Chars => Name_Enter);
- Res :=
- Make_Object_Declaration (Loc,
- Defining_Identifier => Obj,
- Object_Definition => New_Reference_To
- (Standard_Debug_Renaming_Type, Loc));
-
- Set_Debug_Renaming_Link (Obj, Entity (Ren));
-
- Set_Debug_Info_Needed (Obj);
-
- -- Mark the object as internal so that it won't be initialized when
- -- pragma Initialize_Scalars or Normalize_Scalars is in use.
-
- Set_Is_Internal (Obj);
-
- return Res;
-
- -- If we get an exception, just figure it is a case that we cannot
- -- successfully handle using our current approach, since this is
- -- only for debugging, no need to take the compilation with us!
-
- exception
- when others =>
- return Make_Null_Statement (Loc);
- end Debug_Renaming_Declaration;
-
- ----------------------
- -- Get_Encoded_Name --
- ----------------------
-
- -- Note: see spec for details on encodings
-
- procedure Get_Encoded_Name (E : Entity_Id) is
- Has_Suffix : Boolean;
-
- begin
- -- If not generating code, there is no need to create encoded names, and
- -- problems when the back-end is called to annotate types without full
- -- code generation. See comments in Get_External_Name_With_Suffix for
- -- additional details.
-
- -- However we do create encoded names if the back end is active, even
- -- if Operating_Mode got reset. Otherwise any serious error reported
- -- by the backend calling Error_Msg changes the Compilation_Mode to
- -- Check_Semantics, which disables the functionality of this routine,
- -- causing the generation of spurious additional errors.
-
- -- Couldn't we just test Original_Operating_Mode here? ???
-
- if Operating_Mode /= Generate_Code
- and then not Generating_Code
- then
- return;
- end if;
-
- Get_Name_String (Chars (E));
-
- -- Nothing to do if we do not have a type
-
- if not Is_Type (E)
-
- -- Or if this is an enumeration base type
-
- or else (Is_Enumeration_Type (E)
- and then E = Base_Type (E))
-
- -- Or if this is a dummy type for a renaming
-
- or else (Name_Len >= 3 and then
- Name_Buffer (Name_Len - 2 .. Name_Len) = "_XR")
-
- or else (Name_Len >= 4 and then
- (Name_Buffer (Name_Len - 3 .. Name_Len) = "_XRE"
- or else
- Name_Buffer (Name_Len - 3 .. Name_Len) = "_XRP"))
-
- -- For all these cases, just return the name unchanged
-
- then
- Name_Buffer (Name_Len + 1) := ASCII.NUL;
- return;
- end if;
-
- Has_Suffix := True;
-
- -- Fixed-point case
-
- if Is_Fixed_Point_Type (E) then
- Get_External_Name_With_Suffix (E, "XF_");
- Add_Real_To_Buffer (Delta_Value (E));
-
- if Small_Value (E) /= Delta_Value (E) then
- Add_Str_To_Name_Buffer ("_");
- Add_Real_To_Buffer (Small_Value (E));
- end if;
-
- -- Vax floating-point case
-
- elsif Vax_Float (E) then
- if Digits_Value (Base_Type (E)) = 6 then
- Get_External_Name_With_Suffix (E, "XFF");
-
- elsif Digits_Value (Base_Type (E)) = 9 then
- Get_External_Name_With_Suffix (E, "XFF");
-
- else
- pragma Assert (Digits_Value (Base_Type (E)) = 15);
- Get_External_Name_With_Suffix (E, "XFG");
- end if;
-
- -- Discrete case where bounds do not match size
-
- elsif Is_Discrete_Type (E)
- and then not Bounds_Match_Size (E)
- then
- declare
- Lo : constant Node_Id := Type_Low_Bound (E);
- Hi : constant Node_Id := Type_High_Bound (E);
-
- Lo_Con : constant Boolean := Compile_Time_Known_Value (Lo);
- Hi_Con : constant Boolean := Compile_Time_Known_Value (Hi);
-
- Lo_Discr : constant Boolean :=
- Nkind (Lo) = N_Identifier
- and then
- Ekind (Entity (Lo)) = E_Discriminant;
-
- Hi_Discr : constant Boolean :=
- Nkind (Hi) = N_Identifier
- and then
- Ekind (Entity (Hi)) = E_Discriminant;
-
- Lo_Encode : constant Boolean := Lo_Con or Lo_Discr;
- Hi_Encode : constant Boolean := Hi_Con or Hi_Discr;
-
- Biased : constant Boolean := Has_Biased_Representation (E);
-
- begin
- if Biased then
- Get_External_Name_With_Suffix (E, "XB");
- else
- Get_External_Name_With_Suffix (E, "XD");
- end if;
-
- if Lo_Encode or Hi_Encode then
- if Biased then
- Add_Str_To_Name_Buffer ("_");
- else
- if Lo_Encode then
- if Hi_Encode then
- Add_Str_To_Name_Buffer ("LU_");
- else
- Add_Str_To_Name_Buffer ("L_");
- end if;
- else
- Add_Str_To_Name_Buffer ("U_");
- end if;
- end if;
-
- if Lo_Con then
- Add_Uint_To_Buffer (Expr_Rep_Value (Lo));
- elsif Lo_Discr then
- Get_Name_String_And_Append (Chars (Entity (Lo)));
- end if;
-
- if Lo_Encode and Hi_Encode then
- Add_Str_To_Name_Buffer ("__");
- end if;
-
- if Hi_Con then
- Add_Uint_To_Buffer (Expr_Rep_Value (Hi));
- elsif Hi_Discr then
- Get_Name_String_And_Append (Chars (Entity (Hi)));
- end if;
- end if;
- end;
-
- -- For all other cases, the encoded name is the normal type name
-
- else
- Has_Suffix := False;
- Get_External_Name (E, Has_Suffix);
- end if;
-
- if Debug_Flag_B and then Has_Suffix then
- Write_Str ("**** type ");
- Write_Name (Chars (E));
- Write_Str (" is encoded as ");
- Write_Str (Name_Buffer (1 .. Name_Len));
- Write_Eol;
- end if;
-
- Name_Buffer (Name_Len + 1) := ASCII.NUL;
- end Get_Encoded_Name;
-
- -----------------------
- -- Get_External_Name --
- -----------------------
-
- procedure Get_External_Name (Entity : Entity_Id; Has_Suffix : Boolean) is
- E : Entity_Id := Entity;
- Kind : Entity_Kind;
-
- procedure Get_Qualified_Name_And_Append (Entity : Entity_Id);
- -- Appends fully qualified name of given entity to Name_Buffer
-
- -----------------------------------
- -- Get_Qualified_Name_And_Append --
- -----------------------------------
-
- procedure Get_Qualified_Name_And_Append (Entity : Entity_Id) is
- begin
- -- If the entity is a compilation unit, its scope is Standard,
- -- there is no outer scope, and the no further qualification
- -- is required.
-
- -- If the front end has already computed a fully qualified name,
- -- then it is also the case that no further qualification is
- -- required.
-
- if Present (Scope (Scope (Entity)))
- and then not Has_Fully_Qualified_Name (Entity)
- then
- Get_Qualified_Name_And_Append (Scope (Entity));
- Add_Str_To_Name_Buffer ("__");
- Get_Name_String_And_Append (Chars (Entity));
- Append_Homonym_Number (Entity);
-
- else
- Get_Name_String_And_Append (Chars (Entity));
- end if;
- end Get_Qualified_Name_And_Append;
-
- -- Start of processing for Get_External_Name
-
- begin
- Name_Len := 0;
- Homonym_Len := 0;
-
- -- If this is a child unit, we want the child
-
- if Nkind (E) = N_Defining_Program_Unit_Name then
- E := Defining_Identifier (Entity);
- end if;
-
- Kind := Ekind (E);
-
- -- Case of interface name being used
-
- if (Kind = E_Procedure or else
- Kind = E_Function or else
- Kind = E_Constant or else
- Kind = E_Variable or else
- Kind = E_Exception)
- and then Present (Interface_Name (E))
- and then No (Address_Clause (E))
- and then not Has_Suffix
- then
- Add_String_To_Name_Buffer (Strval (Interface_Name (E)));
-
- -- All other cases besides the interface name case
-
- else
- -- If this is a library level subprogram (i.e. a subprogram that is a
- -- compilation unit other than a subunit), then we prepend _ada_ to
- -- ensure distinctions required as described in the spec.
-
- -- Check explicitly for child units, because those are not flagged
- -- as Compilation_Units by lib. Should they be ???
-
- if Is_Subprogram (E)
- and then (Is_Compilation_Unit (E) or Is_Child_Unit (E))
- and then not Has_Suffix
- then
- Add_Str_To_Name_Buffer ("_ada_");
- end if;
-
- -- If the entity is a subprogram instance that is not a compilation
- -- unit, generate the name of the original Ada entity, which is the
- -- one gdb needs.
-
- if Is_Generic_Instance (E)
- and then Is_Subprogram (E)
- and then not Is_Compilation_Unit (Scope (E))
- and then (Ekind (Scope (E)) = E_Package
- or else
- Ekind (Scope (E)) = E_Package_Body)
- and then Present (Related_Instance (Scope (E)))
- then
- E := Related_Instance (Scope (E));
- end if;
-
- Get_Qualified_Name_And_Append (E);
- end if;
-
- Name_Buffer (Name_Len + 1) := ASCII.NUL;
- end Get_External_Name;
-
- -----------------------------------
- -- Get_External_Name_With_Suffix --
- -----------------------------------
-
- procedure Get_External_Name_With_Suffix
- (Entity : Entity_Id;
- Suffix : String)
- is
- Has_Suffix : constant Boolean := (Suffix /= "");
-
- begin
- -- If we are not in code generation mode, this procedure may still be
- -- called from Back_End (more specifically - from gigi for doing type
- -- representation annotation or some representation-specific checks).
- -- But in this mode there is no need to mess with external names.
-
- -- Furthermore, the call causes difficulties in this case because the
- -- string representing the homonym number is not correctly reset as a
- -- part of the call to Output_Homonym_Numbers_Suffix (which is not
- -- called in gigi).
-
- if Operating_Mode /= Generate_Code then
- return;
- end if;
-
- Get_External_Name (Entity, Has_Suffix);
-
- if Has_Suffix then
- Add_Str_To_Name_Buffer ("___");
- Add_Str_To_Name_Buffer (Suffix);
- Name_Buffer (Name_Len + 1) := ASCII.NUL;
- end if;
- end Get_External_Name_With_Suffix;
-
- --------------------------
- -- Get_Variant_Encoding --
- --------------------------
-
- procedure Get_Variant_Encoding (V : Node_Id) is
- Choice : Node_Id;
-
- procedure Choice_Val (Typ : Character; Choice : Node_Id);
- -- Output encoded value for a single choice value. Typ is the key
- -- character ('S', 'F', or 'T') that precedes the choice value.
-
- ----------------
- -- Choice_Val --
- ----------------
-
- procedure Choice_Val (Typ : Character; Choice : Node_Id) is
- begin
- if Nkind (Choice) = N_Integer_Literal then
- Add_Char_To_Name_Buffer (Typ);
- Add_Uint_To_Buffer (Intval (Choice));
-
- -- Character literal with no entity present (this is the case
- -- Standard.Character or Standard.Wide_Character as root type)
-
- elsif Nkind (Choice) = N_Character_Literal
- and then No (Entity (Choice))
- then
- Add_Char_To_Name_Buffer (Typ);
- Add_Uint_To_Buffer (Char_Literal_Value (Choice));
-
- else
- declare
- Ent : constant Entity_Id := Entity (Choice);
-
- begin
- if Ekind (Ent) = E_Enumeration_Literal then
- Add_Char_To_Name_Buffer (Typ);
- Add_Uint_To_Buffer (Enumeration_Rep (Ent));
-
- else
- pragma Assert (Ekind (Ent) = E_Constant);
- Choice_Val (Typ, Constant_Value (Ent));
- end if;
- end;
- end if;
- end Choice_Val;
-
- -- Start of processing for Get_Variant_Encoding
-
- begin
- Name_Len := 0;
-
- Choice := First (Discrete_Choices (V));
- while Present (Choice) loop
- if Nkind (Choice) = N_Others_Choice then
- Add_Char_To_Name_Buffer ('O');
-
- elsif Nkind (Choice) = N_Range then
- Choice_Val ('R', Low_Bound (Choice));
- Choice_Val ('T', High_Bound (Choice));
-
- elsif Is_Entity_Name (Choice)
- and then Is_Type (Entity (Choice))
- then
- Choice_Val ('R', Type_Low_Bound (Entity (Choice)));
- Choice_Val ('T', Type_High_Bound (Entity (Choice)));
-
- elsif Nkind (Choice) = N_Subtype_Indication then
- declare
- Rang : constant Node_Id :=
- Range_Expression (Constraint (Choice));
- begin
- Choice_Val ('R', Low_Bound (Rang));
- Choice_Val ('T', High_Bound (Rang));
- end;
-
- else
- Choice_Val ('S', Choice);
- end if;
-
- Next (Choice);
- end loop;
-
- Name_Buffer (Name_Len + 1) := ASCII.NUL;
-
- if Debug_Flag_B then
- declare
- VP : constant Node_Id := Parent (V); -- Variant_Part
- CL : constant Node_Id := Parent (VP); -- Component_List
- RD : constant Node_Id := Parent (CL); -- Record_Definition
- FT : constant Node_Id := Parent (RD); -- Full_Type_Declaration
-
- begin
- Write_Str ("**** variant for type ");
- Write_Name (Chars (Defining_Identifier (FT)));
- Write_Str (" is encoded as ");
- Write_Str (Name_Buffer (1 .. Name_Len));
- Write_Eol;
- end;
- end if;
- end Get_Variant_Encoding;
-
- ------------------------------------
- -- Get_Secondary_DT_External_Name --
- ------------------------------------
-
- procedure Get_Secondary_DT_External_Name
- (Typ : Entity_Id;
- Ancestor_Typ : Entity_Id;
- Suffix_Index : Int)
- is
- begin
- Get_External_Name (Typ, Has_Suffix => False);
-
- if Ancestor_Typ /= Typ then
- declare
- Len : constant Natural := Name_Len;
- Save_Str : constant String (1 .. Name_Len)
- := Name_Buffer (1 .. Name_Len);
- begin
- Get_External_Name (Ancestor_Typ, Has_Suffix => False);
-
- -- Append the extended name of the ancestor to the
- -- extended name of Typ
-
- Name_Buffer (Len + 2 .. Len + Name_Len + 1) :=
- Name_Buffer (1 .. Name_Len);
- Name_Buffer (1 .. Len) := Save_Str;
- Name_Buffer (Len + 1) := '_';
- Name_Len := Len + Name_Len + 1;
- end;
- end if;
-
- Add_Nat_To_Name_Buffer (Suffix_Index);
- end Get_Secondary_DT_External_Name;
-
- ---------------------------------
- -- Make_Packed_Array_Type_Name --
- ---------------------------------
-
- function Make_Packed_Array_Type_Name
- (Typ : Entity_Id;
- Csize : Uint)
- return Name_Id
- is
- begin
- Get_Name_String (Chars (Typ));
- Add_Str_To_Name_Buffer ("___XP");
- Add_Uint_To_Buffer (Csize);
- return Name_Find;
- end Make_Packed_Array_Type_Name;
-
- -----------------------------------
- -- Output_Homonym_Numbers_Suffix --
- -----------------------------------
-
- procedure Output_Homonym_Numbers_Suffix is
- J : Natural;
-
- begin
- if Homonym_Len > 0 then
-
- -- Check for all 1's, in which case we do not output
-
- J := 1;
- loop
- exit when Homonym_Numbers (J) /= '1';
-
- -- If we reached end of string we do not output
-
- if J = Homonym_Len then
- Homonym_Len := 0;
- return;
- end if;
-
- exit when Homonym_Numbers (J + 1) /= '_';
- J := J + 2;
- end loop;
-
- -- If we exit the loop then suffix must be output
-
- Add_Str_To_Name_Buffer ("__");
- Add_Str_To_Name_Buffer (Homonym_Numbers (1 .. Homonym_Len));
- Homonym_Len := 0;
- end if;
- end Output_Homonym_Numbers_Suffix;
-
- ------------------------------
- -- Prepend_String_To_Buffer --
- ------------------------------
-
- procedure Prepend_String_To_Buffer (S : String) is
- N : constant Integer := S'Length;
- begin
- Name_Buffer (1 + N .. Name_Len + N) := Name_Buffer (1 .. Name_Len);
- Name_Buffer (1 .. N) := S;
- Name_Len := Name_Len + N;
- end Prepend_String_To_Buffer;
-
- ----------------------------
- -- Prepend_Uint_To_Buffer --
- ----------------------------
-
- procedure Prepend_Uint_To_Buffer (U : Uint) is
- begin
- if U < 0 then
- Prepend_String_To_Buffer ("m");
- Prepend_Uint_To_Buffer (-U);
- else
- UI_Image (U, Decimal);
- Prepend_String_To_Buffer (UI_Image_Buffer (1 .. UI_Image_Length));
- end if;
- end Prepend_Uint_To_Buffer;
-
- ------------------------------
- -- Qualify_All_Entity_Names --
- ------------------------------
-
- procedure Qualify_All_Entity_Names is
- E : Entity_Id;
- Ent : Entity_Id;
-
- begin
- for J in Name_Qualify_Units.First .. Name_Qualify_Units.Last loop
- E := Defining_Entity (Name_Qualify_Units.Table (J));
- Qualify_Entity_Name (E);
-
- -- Normally entities in the qualification list are scopes, but in the
- -- case of a library-level package renaming there is an associated
- -- variable that encodes the debugger name and that variable is
- -- entered in the list since it occurs in the Aux_Decls list of the
- -- compilation and doesn't have a normal scope.
-
- if Ekind (E) /= E_Variable then
- Ent := First_Entity (E);
- while Present (Ent) loop
- Qualify_Entity_Name (Ent);
- Next_Entity (Ent);
-
- -- There are odd cases where Last_Entity (E) = E. This happens
- -- in the case of renaming of packages. This test avoids
- -- getting stuck in such cases.
-
- exit when Ent = E;
- end loop;
- end if;
- end loop;
- end Qualify_All_Entity_Names;
-
- -------------------------
- -- Qualify_Entity_Name --
- -------------------------
-
- procedure Qualify_Entity_Name (Ent : Entity_Id) is
-
- Full_Qualify_Name : String (1 .. Name_Buffer'Length);
- Full_Qualify_Len : Natural := 0;
- -- Used to accumulate fully qualified name of subprogram
-
- procedure Fully_Qualify_Name (E : Entity_Id);
- -- Used to qualify a subprogram or type name, where full
- -- qualification up to Standard is always used. Name is set
- -- in Full_Qualify_Name with the length in Full_Qualify_Len.
- -- Note that this routine does not prepend the _ada_ string
- -- required for library subprograms (this is done in the back end).
-
- function Is_BNPE (S : Entity_Id) return Boolean;
- -- Determines if S is a BNPE, i.e. Body-Nested Package Entity, which
- -- is defined to be a package which is immediately nested within a
- -- package body.
-
- function Qualify_Needed (S : Entity_Id) return Boolean;
- -- Given a scope, determines if the scope is to be included in the
- -- fully qualified name, True if so, False if not.
-
- procedure Set_BNPE_Suffix (E : Entity_Id);
- -- Recursive routine to append the BNPE qualification suffix. Works
- -- from right to left with E being the current entity in the list.
- -- The result does NOT have the trailing n's and trailing b stripped.
- -- The caller must do this required stripping.
-
- procedure Set_Entity_Name (E : Entity_Id);
- -- Internal recursive routine that does most of the work. This routine
- -- leaves the result sitting in Name_Buffer and Name_Len.
-
- BNPE_Suffix_Needed : Boolean := False;
- -- Set true if a body-nested package entity suffix is required
-
- Save_Chars : constant Name_Id := Chars (Ent);
- -- Save original name
-
- ------------------------
- -- Fully_Qualify_Name --
- ------------------------
-
- procedure Fully_Qualify_Name (E : Entity_Id) is
- Discard : Boolean := False;
-
- begin
- -- Ignore empty entry (can happen in error cases)
-
- if No (E) then
- return;
-
- -- If this we are qualifying entities local to a generic
- -- instance, use the name of the original instantiation,
- -- not that of the anonymous subprogram in the wrapper
- -- package, so that gdb doesn't have to know about these.
-
- elsif Is_Generic_Instance (E)
- and then Is_Subprogram (E)
- and then not Comes_From_Source (E)
- and then not Is_Compilation_Unit (Scope (E))
- then
- Fully_Qualify_Name (Related_Instance (Scope (E)));
- return;
- end if;
-
- -- If we reached fully qualified name, then just copy it
-
- if Has_Fully_Qualified_Name (E) then
- Get_Name_String (Chars (E));
- Strip_Suffixes (Discard);
- Full_Qualify_Name (1 .. Name_Len) := Name_Buffer (1 .. Name_Len);
- Full_Qualify_Len := Name_Len;
- Set_Has_Fully_Qualified_Name (Ent);
-
- -- Case of non-fully qualified name
-
- else
- if Scope (E) = Standard_Standard then
- Set_Has_Fully_Qualified_Name (Ent);
- else
- Fully_Qualify_Name (Scope (E));
- Full_Qualify_Name (Full_Qualify_Len + 1) := '_';
- Full_Qualify_Name (Full_Qualify_Len + 2) := '_';
- Full_Qualify_Len := Full_Qualify_Len + 2;
- end if;
-
- if Has_Qualified_Name (E) then
- Get_Unqualified_Name_String (Chars (E));
- else
- Get_Name_String (Chars (E));
- end if;
-
- -- Here we do one step of the qualification
-
- Full_Qualify_Name
- (Full_Qualify_Len + 1 .. Full_Qualify_Len + Name_Len) :=
- Name_Buffer (1 .. Name_Len);
- Full_Qualify_Len := Full_Qualify_Len + Name_Len;
- Append_Homonym_Number (E);
- end if;
-
- if Is_BNPE (E) then
- BNPE_Suffix_Needed := True;
- end if;
- end Fully_Qualify_Name;
-
- -------------
- -- Is_BNPE --
- -------------
-
- function Is_BNPE (S : Entity_Id) return Boolean is
- begin
- return
- Ekind (S) = E_Package
- and then Is_Package_Body_Entity (S);
- end Is_BNPE;
-
- --------------------
- -- Qualify_Needed --
- --------------------
-
- function Qualify_Needed (S : Entity_Id) return Boolean is
- begin
- -- If we got all the way to Standard, then we have certainly
- -- fully qualified the name, so set the flag appropriately,
- -- and then return False, since we are most certainly done!
-
- if S = Standard_Standard then
- Set_Has_Fully_Qualified_Name (Ent, True);
- return False;
-
- -- Otherwise figure out if further qualification is required
-
- else
- return
- Is_Subprogram (Ent)
- or else
- Ekind (Ent) = E_Subprogram_Body
- or else
- (Ekind (S) /= E_Block
- and then not Is_Dynamic_Scope (S));
- end if;
- end Qualify_Needed;
-
- ---------------------
- -- Set_BNPE_Suffix --
- ---------------------
-
- procedure Set_BNPE_Suffix (E : Entity_Id) is
- S : constant Entity_Id := Scope (E);
-
- begin
- if Qualify_Needed (S) then
- Set_BNPE_Suffix (S);
-
- if Is_BNPE (E) then
- Add_Char_To_Name_Buffer ('b');
- else
- Add_Char_To_Name_Buffer ('n');
- end if;
-
- else
- Add_Char_To_Name_Buffer ('X');
- end if;
- end Set_BNPE_Suffix;
-
- ---------------------
- -- Set_Entity_Name --
- ---------------------
-
- procedure Set_Entity_Name (E : Entity_Id) is
- S : constant Entity_Id := Scope (E);
-
- begin
- -- If we reach an already qualified name, just take the encoding
- -- except that we strip the package body suffixes, since these
- -- will be separately put on later.
-
- if Has_Qualified_Name (E) then
- Get_Name_String_And_Append (Chars (E));
- Strip_Suffixes (BNPE_Suffix_Needed);
-
- -- If the top level name we are adding is itself fully
- -- qualified, then that means that the name that we are
- -- preparing for the Fully_Qualify_Name call will also
- -- generate a fully qualified name.
-
- if Has_Fully_Qualified_Name (E) then
- Set_Has_Fully_Qualified_Name (Ent);
- end if;
-
- -- Case where upper level name is not encoded yet
-
- else
- -- Recurse if further qualification required
-
- if Qualify_Needed (S) then
- Set_Entity_Name (S);
- Add_Str_To_Name_Buffer ("__");
- end if;
-
- -- Otherwise get name and note if it is a BNPE
-
- Get_Name_String_And_Append (Chars (E));
-
- if Is_BNPE (E) then
- BNPE_Suffix_Needed := True;
- end if;
-
- Append_Homonym_Number (E);
- end if;
- end Set_Entity_Name;
-
- -- Start of processing for Qualify_Entity_Name
-
- begin
- if Has_Qualified_Name (Ent) then
- return;
-
- -- If the entity is a variable encoding the debug name for an object
- -- renaming, then the qualified name of the entity associated with the
- -- renamed object can now be incorporated in the debug name.
-
- elsif Ekind (Ent) = E_Variable
- and then Present (Debug_Renaming_Link (Ent))
- then
- Name_Len := 0;
- Qualify_Entity_Name (Debug_Renaming_Link (Ent));
- Get_Name_String (Chars (Ent));
-
- -- Retrieve the now-qualified name of the renamed entity and insert
- -- it in the middle of the name, just preceding the suffix encoding
- -- describing the renamed object.
-
- declare
- Renamed_Id : constant String :=
- Get_Name_String (Chars (Debug_Renaming_Link (Ent)));
- Insert_Len : constant Integer := Renamed_Id'Length + 1;
- Index : Natural := Name_Len - 3;
-
- begin
- -- Loop backwards through the name to find the start of the "___"
- -- sequence associated with the suffix.
-
- while Index >= Name_Buffer'First
- and then (Name_Buffer (Index + 1) /= '_'
- or else Name_Buffer (Index + 2) /= '_'
- or else Name_Buffer (Index + 3) /= '_')
- loop
- Index := Index - 1;
- end loop;
-
- pragma Assert (Name_Buffer (Index + 1 .. Index + 3) = "___");
-
- -- Insert an underscore separator and the entity name just in
- -- front of the suffix.
-
- Name_Buffer (Index + 1 + Insert_Len .. Name_Len + Insert_Len) :=
- Name_Buffer (Index + 1 .. Name_Len);
- Name_Buffer (Index + 1) := '_';
- Name_Buffer (Index + 2 .. Index + Insert_Len) := Renamed_Id;
- Name_Len := Name_Len + Insert_Len;
- end;
-
- -- Reset the name of the variable to the new name that includes the
- -- name of the renamed entity.
-
- Set_Chars (Ent, Name_Enter);
-
- -- If the entity needs qualification by its scope then develop it
- -- here, add the variable's name, and again reset the entity name.
-
- if Qualify_Needed (Scope (Ent)) then
- Name_Len := 0;
- Set_Entity_Name (Scope (Ent));
- Add_Str_To_Name_Buffer ("__");
-
- Get_Name_String_And_Append (Chars (Ent));
-
- Set_Chars (Ent, Name_Enter);
- end if;
-
- Set_Has_Qualified_Name (Ent);
- return;
-
- elsif Is_Subprogram (Ent)
- or else Ekind (Ent) = E_Subprogram_Body
- or else Is_Type (Ent)
- then
- Fully_Qualify_Name (Ent);
- Name_Len := Full_Qualify_Len;
- Name_Buffer (1 .. Name_Len) := Full_Qualify_Name (1 .. Name_Len);
-
- elsif Qualify_Needed (Scope (Ent)) then
- Name_Len := 0;
- Set_Entity_Name (Ent);
-
- else
- Set_Has_Qualified_Name (Ent);
- return;
- end if;
-
- -- Fall through with a fully qualified name in Name_Buffer/Name_Len
-
- Output_Homonym_Numbers_Suffix;
-
- -- Add body-nested package suffix if required
-
- if BNPE_Suffix_Needed
- and then Ekind (Ent) /= E_Enumeration_Literal
- then
- Set_BNPE_Suffix (Ent);
-
- -- Strip trailing n's and last trailing b as required. note that
- -- we know there is at least one b, or no suffix would be generated.
-
- while Name_Buffer (Name_Len) = 'n' loop
- Name_Len := Name_Len - 1;
- end loop;
-
- Name_Len := Name_Len - 1;
- end if;
-
- Set_Chars (Ent, Name_Enter);
- Set_Has_Qualified_Name (Ent);
-
- if Debug_Flag_BB then
- Write_Str ("*** ");
- Write_Name (Save_Chars);
- Write_Str (" qualified as ");
- Write_Name (Chars (Ent));
- Write_Eol;
- end if;
- end Qualify_Entity_Name;
-
- --------------------------
- -- Qualify_Entity_Names --
- --------------------------
-
- procedure Qualify_Entity_Names (N : Node_Id) is
- begin
- Name_Qualify_Units.Append (N);
- end Qualify_Entity_Names;
-
- --------------------
- -- Strip_Suffixes --
- --------------------
-
- procedure Strip_Suffixes (BNPE_Suffix_Found : in out Boolean) is
- SL : Natural;
-
- pragma Warnings (Off, BNPE_Suffix_Found);
- -- Since this procedure only ever sets the flag
-
- begin
- -- Search for and strip BNPE suffix
-
- for J in reverse 2 .. Name_Len loop
- if Name_Buffer (J) = 'X' then
- Name_Len := J - 1;
- BNPE_Suffix_Found := True;
- exit;
- end if;
-
- exit when Name_Buffer (J) /= 'b' and then Name_Buffer (J) /= 'n';
- end loop;
-
- -- Search for and strip homonym numbers suffix
-
- for J in reverse 2 .. Name_Len - 2 loop
- if Name_Buffer (J) = '_'
- and then Name_Buffer (J + 1) = '_'
- then
- if Name_Buffer (J + 2) in '0' .. '9' then
- if Homonym_Len > 0 then
- Homonym_Len := Homonym_Len + 1;
- Homonym_Numbers (Homonym_Len) := '-';
- end if;
-
- SL := Name_Len - (J + 1);
-
- Homonym_Numbers (Homonym_Len + 1 .. Homonym_Len + SL) :=
- Name_Buffer (J + 2 .. Name_Len);
- Name_Len := J - 1;
- Homonym_Len := Homonym_Len + SL;
- end if;
-
- exit;
- end if;
- end loop;
- end Strip_Suffixes;
-
-end Exp_Dbug;