| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- R T S F I N D -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2015, 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 Atree; use Atree; |
| with Casing; use Casing; |
| with Csets; use Csets; |
| with Debug; use Debug; |
| with Einfo; use Einfo; |
| with Elists; use Elists; |
| with Errout; use Errout; |
| with Exp_Dist; use Exp_Dist; |
| with Fname; use Fname; |
| with Fname.UF; use Fname.UF; |
| with Lib; use Lib; |
| with Lib.Load; use Lib.Load; |
| with Namet; use Namet; |
| with Nlists; use Nlists; |
| with Nmake; use Nmake; |
| with Output; use Output; |
| with Opt; use Opt; |
| with Restrict; use Restrict; |
| with Sem; use Sem; |
| with Sem_Aux; use Sem_Aux; |
| with Sem_Ch7; use Sem_Ch7; |
| with Sem_Dist; use Sem_Dist; |
| with Sem_Util; use Sem_Util; |
| with Sinfo; use Sinfo; |
| with Stand; use Stand; |
| with Snames; use Snames; |
| with Tbuild; use Tbuild; |
| with Uname; use Uname; |
| |
| package body Rtsfind is |
| |
| RTE_Available_Call : Boolean := False; |
| -- Set True during call to RTE from RTE_Available (or from call to |
| -- RTE_Record_Component from RTE_Record_Component_Available). Tells |
| -- the called subprogram to set RTE_Is_Available to False rather than |
| -- generating an error message. |
| |
| RTE_Is_Available : Boolean; |
| -- Set True by RTE_Available on entry. When RTE_Available_Call is set |
| -- True, set False if RTE would otherwise generate an error message. |
| |
| ---------------- |
| -- Unit table -- |
| ---------------- |
| |
| -- The unit table has one entry for each unit included in the definition |
| -- of the type RTU_Id in the spec. The table entries are initialized in |
| -- Initialize to set the Entity field to Empty, indicating that the |
| -- corresponding unit has not yet been loaded. The fields are set when |
| -- a unit is loaded to contain the defining entity for the unit, the |
| -- unit name, and the unit number. |
| |
| -- Note that a unit can be loaded either by a call to find an entity |
| -- within the unit (e.g. RTE), or by an explicit with of the unit. In |
| -- the latter case it is critical to make a call to Set_RTU_Loaded to |
| -- ensure that the entry in this table reflects the load. |
| |
| -- A unit retrieved through rtsfind may end up in the context of several |
| -- other units, in addition to the main unit. These additional with_clauses |
| -- are needed to generate a proper traversal order for CodePeer. To |
| -- minimize somewhat the redundancy created by numerous calls to rtsfind |
| -- from different units, we keep track of the list of implicit with_clauses |
| -- already created for the current loaded unit. |
| |
| type RT_Unit_Table_Record is record |
| Entity : Entity_Id; |
| Uname : Unit_Name_Type; |
| First_Implicit_With : Node_Id; |
| Unum : Unit_Number_Type; |
| end record; |
| |
| RT_Unit_Table : array (RTU_Id) of RT_Unit_Table_Record; |
| |
| -------------------------- |
| -- Runtime Entity Table -- |
| -------------------------- |
| |
| -- There is one entry in the runtime entity table for each entity that is |
| -- included in the definition of the RE_Id type in the spec. The entries |
| -- are set by Initialize_Rtsfind to contain Empty, indicating that the |
| -- entity has not yet been located. Once the entity is located for the |
| -- first time, its ID is stored in this array, so that subsequent calls |
| -- for the same entity can be satisfied immediately. |
| |
| -- NOTE: In order to avoid conflicts between record components and subprgs |
| -- that have the same name (i.e. subprogram External_Tag and |
| -- component External_Tag of package Ada.Tags) this table is not used |
| -- with Record_Components. |
| |
| RE_Table : array (RE_Id) of Entity_Id; |
| |
| -------------------------------- |
| -- Generation of with_clauses -- |
| -------------------------------- |
| |
| -- When a unit is implicitly loaded as a result of a call to RTE, it is |
| -- necessary to create one or two implicit with_clauses. We add such |
| -- with_clauses to the extended main unit if needed, and also to whatever |
| -- unit needs them, which is not necessarily the main unit. The former |
| -- ensures that the object is correctly loaded by the binder. The latter |
| -- is necessary for CodePeer. |
| |
| -- The field First_Implicit_With in the unit table record are used to |
| -- avoid creating duplicate with_clauses. |
| |
| ---------------------------------------------- |
| -- Table of Predefined RE_Id Error Messages -- |
| ---------------------------------------------- |
| |
| -- If an attempt is made to load an entity, given an RE_Id value, and the |
| -- entity is not available in the current configuration, an error message |
| -- is given (see Entity_Not_Defined below). The general form of such an |
| -- error message is for example: |
| |
| -- entity "System.Pack_43.Bits_43" not defined |
| |
| -- The following table defines a set of RE_Id image values for which this |
| -- error message is specialized and replaced by specific text indicating |
| -- the exact message to be output. For example, in the case above, for the |
| -- RE_Id value RE_Bits_43, we do indeed specialize the message, and the |
| -- above generic message is replaced by: |
| |
| -- packed component size of 43 is not supported |
| |
| type CString_Ptr is access constant String; |
| |
| type PRE_Id_Entry is record |
| Str : CString_Ptr; |
| -- Pointer to string with the RE_Id image. The sequence ?? may appear |
| -- in which case it will match any characters in the RE_Id image value. |
| -- This is used to avoid the need for dozens of entries for RE_Bits_??. |
| |
| Msg : CString_Ptr; |
| -- Pointer to string with the corresponding error text. The sequence |
| -- ?? may appear, in which case, it is replaced by the corresponding |
| -- sequence ?? in the Str value (if the first ? is zero, then it is |
| -- omitted from the message). |
| end record; |
| |
| Str1 : aliased constant String := "RE_BITS_??"; |
| Str2 : aliased constant String := "RE_GET_??"; |
| Str3 : aliased constant String := "RE_SET_??"; |
| Str4 : aliased constant String := "RE_CALL_SIMPLE"; |
| |
| MsgPack : aliased constant String := |
| "packed component size of ?? is not supported"; |
| MsgRV : aliased constant String := |
| "task rendezvous is not supported"; |
| |
| PRE_Id_Table : constant array (Natural range <>) of PRE_Id_Entry := |
| (1 => (Str1'Access, MsgPack'Access), |
| 2 => (Str2'Access, MsgPack'Access), |
| 3 => (Str3'Access, MsgPack'Access), |
| 4 => (Str4'Access, MsgRV'Access)); |
| -- We will add entries to this table as we find cases where it is a good |
| -- idea to do so. By no means all the RE_Id values need entries, because |
| -- the expander often gives clear messages before it makes the Rtsfind |
| -- call expecting to find the entity. |
| |
| ----------------------- |
| -- Local Subprograms -- |
| ----------------------- |
| |
| function Check_CRT (E : RE_Id; Eid : Entity_Id) return Entity_Id; |
| -- Check entity Eid to ensure that configurable run-time restrictions are |
| -- met. May generate an error message (if RTE_Available_Call is false) and |
| -- raise RE_Not_Available if entity E does not exist (e.g. Eid is Empty). |
| -- Also check that entity is not overloaded. |
| |
| procedure Entity_Not_Defined (Id : RE_Id); |
| -- Outputs error messages for an entity that is not defined in the run-time |
| -- library (the form of the error message is tailored for no run time or |
| -- configurable run time mode as required). See also table of pre-defined |
| -- messages for entities above (RE_Id_Messages). |
| |
| function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type; |
| -- Retrieves the Unit Name given a unit id represented by its enumeration |
| -- value in RTU_Id. |
| |
| procedure Load_Fail (S : String; U_Id : RTU_Id; Id : RE_Id); |
| pragma No_Return (Load_Fail); |
| -- Internal procedure called if we can't successfully locate or process a |
| -- run-time unit. The parameters give information about the error message |
| -- to be given. S is a reason for failing to compile the file and U_Id is |
| -- the unit id. RE_Id is the RE_Id originally passed to RTE. The message in |
| -- S is one of the following: |
| -- |
| -- "not found" |
| -- "had parser errors" |
| -- "had semantic errors" |
| -- |
| -- The "not found" case is treated specially in that it is considered |
| -- a normal situation in configurable run-time mode, and generates |
| -- a warning, but is otherwise ignored. |
| |
| procedure Load_RTU |
| (U_Id : RTU_Id; |
| Id : RE_Id := RE_Null; |
| Use_Setting : Boolean := False); |
| -- Load the unit whose Id is given if not already loaded. The unit is |
| -- loaded and analyzed, and the entry in RT_Unit_Table is updated to |
| -- reflect the load. Use_Setting is used to indicate the initial setting |
| -- for the Is_Potentially_Use_Visible flag of the entity for the loaded |
| -- unit (if it is indeed loaded). A value of False means nothing special |
| -- need be done. A value of True indicates that this flag must be set to |
| -- True. It is needed only in the Check_Text_IO_Special_Unit procedure, |
| -- which may materialize an entity of Text_IO (or [Wide_]Wide_Text_IO) that |
| -- was previously unknown. Id is the RE_Id value of the entity which was |
| -- originally requested. Id is used only for error message detail, and if |
| -- it is RE_Null, then the attempt to output the entity name is ignored. |
| |
| function Make_Unit_Name |
| (U : RT_Unit_Table_Record; |
| N : Node_Id) return Node_Id; |
| -- If the unit is a child unit, build fully qualified name for use in |
| -- With_Clause. |
| |
| procedure Maybe_Add_With (U : in out RT_Unit_Table_Record); |
| -- If necessary, add an implicit with_clause from the current unit to the |
| -- one represented by U. |
| |
| procedure Output_Entity_Name (Id : RE_Id; Msg : String); |
| -- Output continuation error message giving qualified name of entity |
| -- corresponding to Id, appending the string given by Msg. |
| |
| function RE_Chars (E : RE_Id) return Name_Id; |
| -- Given a RE_Id value returns the Chars of the corresponding entity |
| |
| procedure RTE_Error_Msg (Msg : String); |
| -- Generates a message by calling Error_Msg_N specifying Current_Error_Node |
| -- as the node location using the given Msg text. Special processing in the |
| -- case where RTE_Available_Call is set. In this case, no message is output |
| -- and instead RTE_Is_Available is set to False. Note that this can only be |
| -- used if you are sure that the message comes directly or indirectly from |
| -- a call to the RTE function. |
| |
| --------------- |
| -- Check_CRT -- |
| --------------- |
| |
| function Check_CRT (E : RE_Id; Eid : Entity_Id) return Entity_Id is |
| U_Id : constant RTU_Id := RE_Unit_Table (E); |
| |
| begin |
| if No (Eid) then |
| if RTE_Available_Call then |
| RTE_Is_Available := False; |
| else |
| Entity_Not_Defined (E); |
| end if; |
| |
| raise RE_Not_Available; |
| |
| -- Entity is available |
| |
| else |
| -- If in No_Run_Time mode and entity is neither in the current unit |
| -- nor in one of the specially permitted units, raise the exception. |
| |
| if No_Run_Time_Mode |
| and then not OK_No_Run_Time_Unit (U_Id) |
| |
| -- If the entity being referenced is defined in the current scope, |
| -- using it is always fine as such usage can never introduce any |
| -- dependency on an additional unit. The presence of this test |
| -- helps generating meaningful error messages for CRT violations. |
| |
| and then Scope (Eid) /= Current_Scope |
| then |
| Entity_Not_Defined (E); |
| raise RE_Not_Available; |
| end if; |
| |
| -- Check entity is not overloaded, checking for special exceptions |
| |
| if Has_Homonym (Eid) |
| and then E /= RE_Save_Occurrence |
| then |
| Set_Standard_Error; |
| Write_Str ("Run-time configuration error ("); |
| Write_Str ("rtsfind entity """); |
| Get_Decoded_Name_String (Chars (Eid)); |
| Set_Casing (Mixed_Case); |
| Write_Str (Name_Buffer (1 .. Name_Len)); |
| Write_Str (""" is overloaded)"); |
| Write_Eol; |
| raise Unrecoverable_Error; |
| end if; |
| |
| -- Otherwise entity is accessible |
| |
| return Eid; |
| end if; |
| end Check_CRT; |
| |
| -------------------------------- |
| -- Check_Text_IO_Special_Unit -- |
| -------------------------------- |
| |
| procedure Check_Text_IO_Special_Unit (Nam : Node_Id) is |
| Chrs : Name_Id; |
| |
| type Name_Map_Type is array (Text_IO_Package_Name) of RTU_Id; |
| |
| Name_Map : constant Name_Map_Type := Name_Map_Type'( |
| Name_Decimal_IO => Ada_Text_IO_Decimal_IO, |
| Name_Enumeration_IO => Ada_Text_IO_Enumeration_IO, |
| Name_Fixed_IO => Ada_Text_IO_Fixed_IO, |
| Name_Float_IO => Ada_Text_IO_Float_IO, |
| Name_Integer_IO => Ada_Text_IO_Integer_IO, |
| Name_Modular_IO => Ada_Text_IO_Modular_IO); |
| |
| Wide_Name_Map : constant Name_Map_Type := Name_Map_Type'( |
| Name_Decimal_IO => Ada_Wide_Text_IO_Decimal_IO, |
| Name_Enumeration_IO => Ada_Wide_Text_IO_Enumeration_IO, |
| Name_Fixed_IO => Ada_Wide_Text_IO_Fixed_IO, |
| Name_Float_IO => Ada_Wide_Text_IO_Float_IO, |
| Name_Integer_IO => Ada_Wide_Text_IO_Integer_IO, |
| Name_Modular_IO => Ada_Wide_Text_IO_Modular_IO); |
| |
| Wide_Wide_Name_Map : constant Name_Map_Type := Name_Map_Type'( |
| Name_Decimal_IO => Ada_Wide_Wide_Text_IO_Decimal_IO, |
| Name_Enumeration_IO => Ada_Wide_Wide_Text_IO_Enumeration_IO, |
| Name_Fixed_IO => Ada_Wide_Wide_Text_IO_Fixed_IO, |
| Name_Float_IO => Ada_Wide_Wide_Text_IO_Float_IO, |
| Name_Integer_IO => Ada_Wide_Wide_Text_IO_Integer_IO, |
| Name_Modular_IO => Ada_Wide_Wide_Text_IO_Modular_IO); |
| |
| To_Load : RTU_Id; |
| -- Unit to be loaded, from one of the above maps |
| |
| begin |
| -- Nothing to do if name is not an identifier or a selected component |
| -- whose selector_name is an identifier. |
| |
| if Nkind (Nam) = N_Identifier then |
| Chrs := Chars (Nam); |
| |
| elsif Nkind (Nam) = N_Selected_Component |
| and then Nkind (Selector_Name (Nam)) = N_Identifier |
| then |
| Chrs := Chars (Selector_Name (Nam)); |
| |
| else |
| return; |
| end if; |
| |
| -- Nothing to do if name is not one of the Text_IO subpackages |
| -- Otherwise look through loaded units, and if we find Text_IO |
| -- or [Wide_]Wide_Text_IO already loaded, then load the proper child. |
| |
| if Chrs in Text_IO_Package_Name then |
| for U in Main_Unit .. Last_Unit loop |
| Get_Name_String (Unit_File_Name (U)); |
| |
| if Name_Len = 12 then |
| |
| -- Here is where we do the loads if we find one of the units |
| -- Ada.Text_IO or Ada.[Wide_]Wide_Text_IO. An interesting |
| -- detail is that these units may already be used (i.e. their |
| -- In_Use flags may be set). Normally when the In_Use flag is |
| -- set, the Is_Potentially_Use_Visible flag of all entities in |
| -- the package is set, but the new entity we are mysteriously |
| -- adding was not there to have its flag set at the time. So |
| -- that's why we pass the extra parameter to RTU_Find, to make |
| -- sure the flag does get set now. Given that those generic |
| -- packages are in fact child units, we must indicate that |
| -- they are visible. |
| |
| if Name_Buffer (1 .. 12) = "a-textio.ads" then |
| To_Load := Name_Map (Chrs); |
| |
| elsif Name_Buffer (1 .. 12) = "a-witeio.ads" then |
| To_Load := Wide_Name_Map (Chrs); |
| |
| elsif Name_Buffer (1 .. 12) = "a-ztexio.ads" then |
| To_Load := Wide_Wide_Name_Map (Chrs); |
| |
| else |
| goto Continue; |
| end if; |
| |
| Load_RTU (To_Load, Use_Setting => In_Use (Cunit_Entity (U))); |
| Set_Is_Visible_Lib_Unit (RT_Unit_Table (To_Load).Entity); |
| |
| -- Prevent creation of an implicit 'with' from (for example) |
| -- Ada.Wide_Text_IO.Integer_IO to Ada.Text_IO.Integer_IO, |
| -- because these could create cycles. First check whether the |
| -- simple names match ("integer_io" = "integer_io"), and then |
| -- check whether the parent is indeed one of the |
| -- [[Wide_]Wide_]Text_IO packages. |
| |
| if Chrs = Chars (Cunit_Entity (Current_Sem_Unit)) then |
| declare |
| Parent_Name : constant Unit_Name_Type := |
| Get_Parent_Spec_Name |
| (Unit_Name (Current_Sem_Unit)); |
| |
| begin |
| if Parent_Name /= No_Unit_Name then |
| Get_Name_String (Parent_Name); |
| |
| declare |
| P : String renames Name_Buffer (1 .. Name_Len); |
| begin |
| if P = "ada.text_io%s" or else |
| P = "ada.wide_text_io%s" or else |
| P = "ada.wide_wide_text_io%s" |
| then |
| goto Continue; |
| end if; |
| end; |
| end if; |
| end; |
| end if; |
| |
| -- Add an implicit with clause from the current unit to the |
| -- [[Wide_]Wide_]Text_IO child (if necessary). |
| |
| Maybe_Add_With (RT_Unit_Table (To_Load)); |
| end if; |
| |
| <<Continue>> null; |
| end loop; |
| end if; |
| |
| exception |
| -- Generate error message if run-time unit not available |
| |
| when RE_Not_Available => |
| Error_Msg_N ("& not available", Nam); |
| end Check_Text_IO_Special_Unit; |
| |
| ------------------------ |
| -- Entity_Not_Defined -- |
| ------------------------ |
| |
| procedure Entity_Not_Defined (Id : RE_Id) is |
| begin |
| if No_Run_Time_Mode then |
| |
| -- If the error occurs when compiling the body of a predefined |
| -- unit for inlining purposes, the body must be illegal in this |
| -- mode, and there is no point in continuing. |
| |
| if Is_Predefined_File_Name |
| (Unit_File_Name (Get_Source_Unit (Sloc (Current_Error_Node)))) |
| then |
| Error_Msg_N |
| ("construct not allowed in no run time mode!", |
| Current_Error_Node); |
| raise Unrecoverable_Error; |
| |
| else |
| RTE_Error_Msg ("|construct not allowed in no run time mode"); |
| end if; |
| |
| elsif Configurable_Run_Time_Mode then |
| RTE_Error_Msg ("|construct not allowed in this configuration>"); |
| else |
| RTE_Error_Msg ("run-time configuration error"); |
| end if; |
| |
| -- See if this entry is to be found in the PRE_Id table that provides |
| -- specialized messages for some RE_Id values. |
| |
| for J in PRE_Id_Table'Range loop |
| declare |
| TStr : constant String := PRE_Id_Table (J).Str.all; |
| RStr : constant String := RE_Id'Image (Id); |
| TMsg : String := PRE_Id_Table (J).Msg.all; |
| LMsg : Natural := TMsg'Length; |
| |
| begin |
| if TStr'Length = RStr'Length then |
| for J in TStr'Range loop |
| if TStr (J) /= RStr (J) and then TStr (J) /= '?' then |
| goto Continue; |
| end if; |
| end loop; |
| |
| for J in TMsg'First .. TMsg'Last - 1 loop |
| if TMsg (J) = '?' then |
| for K in 1 .. TStr'Last loop |
| if TStr (K) = '?' then |
| if RStr (K) = '0' then |
| TMsg (J) := RStr (K + 1); |
| TMsg (J + 1 .. LMsg - 1) := TMsg (J + 2 .. LMsg); |
| LMsg := LMsg - 1; |
| else |
| TMsg (J .. J + 1) := RStr (K .. K + 1); |
| end if; |
| |
| exit; |
| end if; |
| end loop; |
| end if; |
| end loop; |
| |
| RTE_Error_Msg (TMsg (1 .. LMsg)); |
| return; |
| end if; |
| end; |
| |
| <<Continue>> null; |
| end loop; |
| |
| -- We did not find an entry in the table, so output the generic entity |
| -- not found message, where the name of the entity corresponds to the |
| -- given RE_Id value. |
| |
| Output_Entity_Name (Id, "not defined"); |
| end Entity_Not_Defined; |
| |
| ------------------- |
| -- Get_Unit_Name -- |
| ------------------- |
| |
| function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type is |
| Uname_Chars : constant String := RTU_Id'Image (U_Id); |
| |
| begin |
| Name_Len := Uname_Chars'Length; |
| Name_Buffer (1 .. Name_Len) := Uname_Chars; |
| Set_Casing (All_Lower_Case); |
| |
| if U_Id in Ada_Child then |
| Name_Buffer (4) := '.'; |
| |
| if U_Id in Ada_Calendar_Child then |
| Name_Buffer (13) := '.'; |
| |
| elsif U_Id in Ada_Dispatching_Child then |
| Name_Buffer (16) := '.'; |
| |
| elsif U_Id in Ada_Interrupts_Child then |
| Name_Buffer (15) := '.'; |
| |
| elsif U_Id in Ada_Numerics_Child then |
| Name_Buffer (13) := '.'; |
| |
| elsif U_Id in Ada_Real_Time_Child then |
| Name_Buffer (14) := '.'; |
| |
| elsif U_Id in Ada_Streams_Child then |
| Name_Buffer (12) := '.'; |
| |
| elsif U_Id in Ada_Strings_Child then |
| Name_Buffer (12) := '.'; |
| |
| elsif U_Id in Ada_Text_IO_Child then |
| Name_Buffer (12) := '.'; |
| |
| elsif U_Id in Ada_Wide_Text_IO_Child then |
| Name_Buffer (17) := '.'; |
| |
| elsif U_Id in Ada_Wide_Wide_Text_IO_Child then |
| Name_Buffer (22) := '.'; |
| end if; |
| |
| elsif U_Id in Interfaces_Child then |
| Name_Buffer (11) := '.'; |
| |
| elsif U_Id in System_Child then |
| Name_Buffer (7) := '.'; |
| |
| if U_Id in System_Dim_Child then |
| Name_Buffer (11) := '.'; |
| end if; |
| |
| if U_Id in System_Multiprocessors_Child then |
| Name_Buffer (23) := '.'; |
| end if; |
| |
| if U_Id in System_Storage_Pools_Child then |
| Name_Buffer (21) := '.'; |
| end if; |
| |
| if U_Id in System_Strings_Child then |
| Name_Buffer (15) := '.'; |
| end if; |
| |
| if U_Id in System_Tasking_Child then |
| Name_Buffer (15) := '.'; |
| end if; |
| |
| if U_Id in System_Tasking_Restricted_Child then |
| Name_Buffer (26) := '.'; |
| end if; |
| |
| if U_Id in System_Tasking_Protected_Objects_Child then |
| Name_Buffer (33) := '.'; |
| end if; |
| |
| if U_Id in System_Tasking_Async_Delays_Child then |
| Name_Buffer (28) := '.'; |
| end if; |
| end if; |
| |
| -- Add %s at end for spec |
| |
| Name_Buffer (Name_Len + 1) := '%'; |
| Name_Buffer (Name_Len + 2) := 's'; |
| Name_Len := Name_Len + 2; |
| |
| return Name_Find; |
| end Get_Unit_Name; |
| |
| ---------------- |
| -- Initialize -- |
| ---------------- |
| |
| procedure Initialize is |
| begin |
| -- Initialize the unit table |
| |
| for J in RTU_Id loop |
| RT_Unit_Table (J).Entity := Empty; |
| end loop; |
| |
| for J in RE_Id loop |
| RE_Table (J) := Empty; |
| end loop; |
| |
| RTE_Is_Available := False; |
| end Initialize; |
| |
| ------------ |
| -- Is_RTE -- |
| ------------ |
| |
| function Is_RTE (Ent : Entity_Id; E : RE_Id) return Boolean is |
| E_Unit_Name : Unit_Name_Type; |
| Ent_Unit_Name : Unit_Name_Type; |
| |
| S : Entity_Id; |
| E1 : Entity_Id; |
| E2 : Entity_Id; |
| |
| begin |
| if No (Ent) then |
| return False; |
| |
| -- If E has already a corresponding entity, check it directly, |
| -- going to full views if they exist to deal with the incomplete |
| -- and private type cases properly. |
| |
| elsif Present (RE_Table (E)) then |
| E1 := Ent; |
| |
| if Is_Type (E1) and then Present (Full_View (E1)) then |
| E1 := Full_View (E1); |
| end if; |
| |
| E2 := RE_Table (E); |
| |
| if Is_Type (E2) and then Present (Full_View (E2)) then |
| E2 := Full_View (E2); |
| end if; |
| |
| return E1 = E2; |
| end if; |
| |
| -- If the unit containing E is not loaded, we already know that the |
| -- entity we have cannot have come from this unit. |
| |
| E_Unit_Name := Get_Unit_Name (RE_Unit_Table (E)); |
| |
| if not Is_Loaded (E_Unit_Name) then |
| return False; |
| end if; |
| |
| -- Here the unit containing the entity is loaded. We have not made |
| -- an explicit call to RTE to get the entity in question, but we may |
| -- have obtained a reference to it indirectly from some other entity |
| -- in the same unit, or some other unit that references it. |
| |
| -- Get the defining unit of the entity |
| |
| S := Scope (Ent); |
| |
| if No (S) or else Ekind (S) /= E_Package then |
| return False; |
| end if; |
| |
| Ent_Unit_Name := Get_Unit_Name (Unit_Declaration_Node (S)); |
| |
| -- If the defining unit of the entity we are testing is not the |
| -- unit containing E, then they cannot possibly match. |
| |
| if Ent_Unit_Name /= E_Unit_Name then |
| return False; |
| end if; |
| |
| -- If the units match, then compare the names (remember that no |
| -- overloading is permitted in entities fetched using Rtsfind). |
| |
| if RE_Chars (E) = Chars (Ent) then |
| RE_Table (E) := Ent; |
| |
| -- If front-end inlining is enabled, we may be within a body that |
| -- contains inlined functions, which has not been retrieved through |
| -- rtsfind, and therefore is not yet recorded in the RT_Unit_Table. |
| -- Add the unit information now, it must be fully available. |
| |
| declare |
| U : RT_Unit_Table_Record |
| renames RT_Unit_Table (RE_Unit_Table (E)); |
| begin |
| if No (U.Entity) then |
| U.Entity := S; |
| U.Uname := E_Unit_Name; |
| U.Unum := Get_Source_Unit (S); |
| end if; |
| end; |
| |
| return True; |
| else |
| return False; |
| end if; |
| end Is_RTE; |
| |
| ------------ |
| -- Is_RTU -- |
| ------------ |
| |
| function Is_RTU (Ent : Entity_Id; U : RTU_Id) return Boolean is |
| E : constant Entity_Id := RT_Unit_Table (U).Entity; |
| begin |
| return Present (E) and then E = Ent; |
| end Is_RTU; |
| |
| ----------------------------- |
| -- Is_Text_IO_Special_Unit -- |
| ----------------------------- |
| |
| function Is_Text_IO_Special_Unit (Nam : Node_Id) return Boolean is |
| Prf : Node_Id; |
| Sel : Node_Id; |
| |
| begin |
| if Nkind (Nam) /= N_Expanded_Name then |
| return False; |
| end if; |
| |
| Prf := Prefix (Nam); |
| Sel := Selector_Name (Nam); |
| |
| if Nkind (Sel) /= N_Expanded_Name |
| or else Nkind (Prf) /= N_Identifier |
| or else Chars (Prf) /= Name_Ada |
| then |
| return False; |
| end if; |
| |
| Prf := Prefix (Sel); |
| Sel := Selector_Name (Sel); |
| |
| return |
| Nkind (Prf) = N_Identifier |
| and then |
| Nam_In (Chars (Prf), Name_Text_IO, |
| Name_Wide_Text_IO, |
| Name_Wide_Wide_Text_IO) |
| and then Nkind (Sel) = N_Identifier |
| and then Chars (Sel) in Text_IO_Package_Name; |
| end Is_Text_IO_Special_Unit; |
| |
| --------------- |
| -- Load_Fail -- |
| --------------- |
| |
| procedure Load_Fail (S : String; U_Id : RTU_Id; Id : RE_Id) is |
| M : String (1 .. 100); |
| P : Natural := 0; |
| |
| begin |
| -- Output header message |
| |
| if Configurable_Run_Time_Mode then |
| RTE_Error_Msg ("construct not allowed in configurable run-time mode"); |
| else |
| RTE_Error_Msg ("run-time library configuration error"); |
| end if; |
| |
| -- Output file name and reason string |
| |
| M (1 .. 6) := "\file "; |
| P := 6; |
| |
| Get_Name_String |
| (Get_File_Name (RT_Unit_Table (U_Id).Uname, Subunit => False)); |
| M (P + 1 .. P + Name_Len) := Name_Buffer (1 .. Name_Len); |
| P := P + Name_Len; |
| |
| M (P + 1) := ' '; |
| P := P + 1; |
| |
| M (P + 1 .. P + S'Length) := S; |
| P := P + S'Length; |
| |
| RTE_Error_Msg (M (1 .. P)); |
| |
| -- Output entity name |
| |
| Output_Entity_Name (Id, "not available"); |
| |
| -- In configurable run time mode, we raise RE_Not_Available, and the |
| -- caller is expected to deal gracefully with this. In the case of a |
| -- call to RTE_Available, this exception will be caught in Rtsfind, |
| -- and result in a returned value of False for the call. |
| |
| if Configurable_Run_Time_Mode then |
| raise RE_Not_Available; |
| |
| -- Here we have a load failure in normal full run time mode. See if we |
| -- are in the context of an RTE_Available call. If so, we just raise |
| -- RE_Not_Available. This can happen if a unit is unavailable, which |
| -- happens for example in the VM case, where the run-time is not |
| -- complete, but we do not regard it as a configurable run-time. |
| -- If the caller has done an explicit call to RTE_Available, then |
| -- clearly the caller is prepared to deal with a result of False. |
| |
| elsif RTE_Available_Call then |
| RTE_Is_Available := False; |
| raise RE_Not_Available; |
| |
| -- If we are not in the context of an RTE_Available call, we are really |
| -- trying to load an entity that is not there, and that should never |
| -- happen, so in this case we signal a fatal error. |
| |
| else |
| raise Unrecoverable_Error; |
| end if; |
| end Load_Fail; |
| |
| -------------- |
| -- Load_RTU -- |
| -------------- |
| |
| procedure Load_RTU |
| (U_Id : RTU_Id; |
| Id : RE_Id := RE_Null; |
| Use_Setting : Boolean := False) |
| is |
| U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id); |
| Priv_Par : constant Elist_Id := New_Elmt_List; |
| Lib_Unit : Node_Id; |
| |
| procedure Save_Private_Visibility; |
| -- If the current unit is the body of child unit or the spec of a |
| -- private child unit, the private declarations of the parent(s) are |
| -- visible. If the unit to be loaded is another public sibling, its |
| -- compilation will affect the visibility of the common ancestors. |
| -- Indicate those that must be restored. |
| |
| procedure Restore_Private_Visibility; |
| -- Restore the visibility of ancestors after compiling RTU |
| |
| -------------------------------- |
| -- Restore_Private_Visibility -- |
| -------------------------------- |
| |
| procedure Restore_Private_Visibility is |
| E_Par : Elmt_Id; |
| |
| begin |
| E_Par := First_Elmt (Priv_Par); |
| while Present (E_Par) loop |
| if not In_Private_Part (Node (E_Par)) then |
| Install_Private_Declarations (Node (E_Par)); |
| end if; |
| |
| Next_Elmt (E_Par); |
| end loop; |
| end Restore_Private_Visibility; |
| |
| ----------------------------- |
| -- Save_Private_Visibility -- |
| ----------------------------- |
| |
| procedure Save_Private_Visibility is |
| Par : Entity_Id; |
| |
| begin |
| Par := Scope (Current_Scope); |
| while Present (Par) |
| and then Par /= Standard_Standard |
| loop |
| if Ekind (Par) = E_Package |
| and then Is_Compilation_Unit (Par) |
| and then In_Private_Part (Par) |
| then |
| Append_Elmt (Par, Priv_Par); |
| end if; |
| |
| Par := Scope (Par); |
| end loop; |
| end Save_Private_Visibility; |
| |
| -- Local variables |
| |
| GM : constant Ghost_Mode_Type := Ghost_Mode; |
| -- Save the current Ghost mode in effect to ensure a clean environment |
| -- when analyzing the unit. |
| |
| -- Start of processing for Load_RTU |
| |
| begin |
| -- Nothing to do if unit is already loaded |
| |
| if Present (U.Entity) then |
| return; |
| end if; |
| |
| -- Provide a clean environment for the unit |
| |
| Ghost_Mode := None; |
| |
| -- Note if secondary stack is used |
| |
| if U_Id = System_Secondary_Stack then |
| Opt.Sec_Stack_Used := True; |
| end if; |
| |
| -- Otherwise we need to load the unit, First build unit name |
| -- from the enumeration literal name in type RTU_Id. |
| |
| U.Uname := Get_Unit_Name (U_Id); |
| U. First_Implicit_With := Empty; |
| |
| -- Now do the load call, note that setting Error_Node to Empty is |
| -- a signal to Load_Unit that we will regard a failure to find the |
| -- file as a fatal error, and that it should not output any kind |
| -- of diagnostics, since we will take care of it here. |
| |
| -- We save style checking switches and turn off style checking for |
| -- loading the unit, since we don't want any style checking. |
| |
| declare |
| Save_Style_Check : constant Boolean := Style_Check; |
| begin |
| Style_Check := False; |
| U.Unum := |
| Load_Unit |
| (Load_Name => U.Uname, |
| Required => False, |
| Subunit => False, |
| Error_Node => Empty); |
| Style_Check := Save_Style_Check; |
| end; |
| |
| -- Check for bad unit load |
| |
| if U.Unum = No_Unit then |
| Load_Fail ("not found", U_Id, Id); |
| elsif Fatal_Error (U.Unum) = Error_Detected then |
| Load_Fail ("had parser errors", U_Id, Id); |
| end if; |
| |
| -- Make sure that the unit is analyzed |
| |
| declare |
| Was_Analyzed : constant Boolean := |
| Analyzed (Cunit (Current_Sem_Unit)); |
| |
| begin |
| -- Pretend that the current unit is analyzed, in case it is System |
| -- or some such. This allows us to put some declarations, such as |
| -- exceptions and packed arrays of Boolean, into System even though |
| -- expanding them requires System... |
| |
| -- This is a bit odd but works fine. If the RTS unit does not depend |
| -- in any way on the current unit, then it never gets back into the |
| -- current unit's tree, and the change we make to the current unit |
| -- tree is never noticed by anyone (it is undone in a moment). That |
| -- is the normal situation. |
| |
| -- If the RTS Unit *does* depend on the current unit, for instance, |
| -- when you are compiling System, then you had better have finished |
| -- analyzing the part of System that is depended on before you try to |
| -- load the RTS Unit. This means having the code in System ordered in |
| -- an appropriate manner. |
| |
| Set_Analyzed (Cunit (Current_Sem_Unit), True); |
| |
| if not Analyzed (Cunit (U.Unum)) then |
| |
| -- If the unit is already loaded through a limited_with_clause, |
| -- the relevant entities must already be available. We do not |
| -- want to load and analyze the unit because this would create |
| -- a real semantic dependence when the purpose of the limited_with |
| -- is precisely to avoid such. |
| |
| if From_Limited_With (Cunit_Entity (U.Unum)) then |
| null; |
| |
| else |
| Save_Private_Visibility; |
| Semantics (Cunit (U.Unum)); |
| Restore_Private_Visibility; |
| |
| if Fatal_Error (U.Unum) = Error_Detected then |
| Load_Fail ("had semantic errors", U_Id, Id); |
| end if; |
| end if; |
| end if; |
| |
| -- Undo the pretence |
| |
| Set_Analyzed (Cunit (Current_Sem_Unit), Was_Analyzed); |
| end; |
| |
| Lib_Unit := Unit (Cunit (U.Unum)); |
| U.Entity := Defining_Entity (Lib_Unit); |
| |
| if Use_Setting then |
| Set_Is_Potentially_Use_Visible (U.Entity, True); |
| end if; |
| |
| -- Restore the original Ghost mode now that analysis has taken place |
| |
| Ghost_Mode := GM; |
| end Load_RTU; |
| |
| -------------------- |
| -- Make_Unit_Name -- |
| -------------------- |
| |
| function Make_Unit_Name |
| (U : RT_Unit_Table_Record; |
| N : Node_Id) return Node_Id is |
| |
| Nam : Node_Id; |
| Scop : Entity_Id; |
| |
| begin |
| Nam := New_Occurrence_Of (U.Entity, Standard_Location); |
| Scop := Scope (U.Entity); |
| |
| if Nkind (N) = N_Defining_Program_Unit_Name then |
| while Scop /= Standard_Standard loop |
| Nam := |
| Make_Expanded_Name (Standard_Location, |
| Chars => Chars (U.Entity), |
| Prefix => New_Occurrence_Of (Scop, Standard_Location), |
| Selector_Name => Nam); |
| Set_Entity (Nam, U.Entity); |
| |
| Scop := Scope (Scop); |
| end loop; |
| end if; |
| |
| return Nam; |
| end Make_Unit_Name; |
| |
| -------------------- |
| -- Maybe_Add_With -- |
| -------------------- |
| |
| procedure Maybe_Add_With (U : in out RT_Unit_Table_Record) is |
| begin |
| -- We do not need to generate a with_clause for a call issued from |
| -- RTE_Component_Available. However, for CodePeer, we need these |
| -- additional with's, because for a sequence like "if RTE_Available (X) |
| -- then ... RTE (X)" the RTE call fails to create some necessary with's. |
| |
| if RTE_Available_Call and not Generate_SCIL then |
| return; |
| end if; |
| |
| -- Avoid creating directly self-referential with clauses |
| |
| if Current_Sem_Unit = U.Unum then |
| return; |
| end if; |
| |
| -- Add the with_clause, if we have not already added an implicit with |
| -- for this unit to the current compilation unit. |
| |
| declare |
| LibUnit : constant Node_Id := Unit (Cunit (U.Unum)); |
| Clause : Node_Id; |
| Withn : Node_Id; |
| |
| begin |
| Clause := U.First_Implicit_With; |
| while Present (Clause) loop |
| if Parent (Clause) = Cunit (Current_Sem_Unit) then |
| return; |
| end if; |
| |
| Clause := Next_Implicit_With (Clause); |
| end loop; |
| |
| Withn := |
| Make_With_Clause (Standard_Location, |
| Name => |
| Make_Unit_Name |
| (U, Defining_Unit_Name (Specification (LibUnit)))); |
| |
| Set_Library_Unit (Withn, Cunit (U.Unum)); |
| Set_Corresponding_Spec (Withn, U.Entity); |
| Set_First_Name (Withn, True); |
| Set_Implicit_With (Withn, True); |
| Set_Next_Implicit_With (Withn, U.First_Implicit_With); |
| |
| U.First_Implicit_With := Withn; |
| |
| Mark_Rewrite_Insertion (Withn); |
| Append (Withn, Context_Items (Cunit (Current_Sem_Unit))); |
| Check_Restriction_No_Dependence (Name (Withn), Current_Error_Node); |
| end; |
| end Maybe_Add_With; |
| |
| ------------------------ |
| -- Output_Entity_Name -- |
| ------------------------ |
| |
| procedure Output_Entity_Name (Id : RE_Id; Msg : String) is |
| M : String (1 .. 2048); |
| P : Natural := 0; |
| -- M (1 .. P) is current message to be output |
| |
| RE_Image : constant String := RE_Id'Image (Id); |
| |
| begin |
| if Id = RE_Null then |
| return; |
| end if; |
| |
| M (1 .. 9) := "\entity """; |
| P := 9; |
| |
| -- Add unit name to message, excluding %s or %b at end |
| |
| Get_Name_String (Get_Unit_Name (RE_Unit_Table (Id))); |
| Name_Len := Name_Len - 2; |
| Set_Casing (Mixed_Case); |
| M (P + 1 .. P + Name_Len) := Name_Buffer (1 .. Name_Len); |
| P := P + Name_Len; |
| |
| -- Add a qualifying period |
| |
| M (P + 1) := '.'; |
| P := P + 1; |
| |
| -- Add entity name and closing quote to message |
| |
| Name_Len := RE_Image'Length - 3; |
| Name_Buffer (1 .. Name_Len) := RE_Image (4 .. RE_Image'Length); |
| Set_Casing (Mixed_Case); |
| M (P + 1 .. P + Name_Len) := Name_Buffer (1 .. Name_Len); |
| P := P + Name_Len; |
| M (P + 1) := '"'; |
| P := P + 1; |
| |
| -- Add message |
| |
| M (P + 1) := ' '; |
| P := P + 1; |
| M (P + 1 .. P + Msg'Length) := Msg; |
| P := P + Msg'Length; |
| |
| -- Output message at current error node location |
| |
| RTE_Error_Msg (M (1 .. P)); |
| end Output_Entity_Name; |
| |
| -------------- |
| -- RE_Chars -- |
| -------------- |
| |
| function RE_Chars (E : RE_Id) return Name_Id is |
| RE_Name_Chars : constant String := RE_Id'Image (E); |
| |
| begin |
| -- Copy name skipping initial RE_ or RO_XX characters |
| |
| if RE_Name_Chars (1 .. 2) = "RE" then |
| for J in 4 .. RE_Name_Chars'Last loop |
| Name_Buffer (J - 3) := Fold_Lower (RE_Name_Chars (J)); |
| end loop; |
| |
| Name_Len := RE_Name_Chars'Length - 3; |
| |
| else |
| for J in 7 .. RE_Name_Chars'Last loop |
| Name_Buffer (J - 6) := Fold_Lower (RE_Name_Chars (J)); |
| end loop; |
| |
| Name_Len := RE_Name_Chars'Length - 6; |
| end if; |
| |
| return Name_Find; |
| end RE_Chars; |
| |
| --------- |
| -- RTE -- |
| --------- |
| |
| function RTE (E : RE_Id) return Entity_Id is |
| U_Id : constant RTU_Id := RE_Unit_Table (E); |
| U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id); |
| |
| Lib_Unit : Node_Id; |
| Pkg_Ent : Entity_Id; |
| Ename : Name_Id; |
| |
| -- The following flag is used to disable front-end inlining when RTE |
| -- is invoked. This prevents the analysis of other runtime bodies when |
| -- a particular spec is loaded through Rtsfind. This is both efficient, |
| -- and it prevents spurious visibility conflicts between use-visible |
| -- user entities, and entities in run-time packages. |
| |
| Save_Front_End_Inlining : Boolean; |
| |
| procedure Check_RPC; |
| -- Reject programs that make use of distribution features not supported |
| -- on the current target. Also check that the PCS is compatible with the |
| -- code generator version. On such targets (Vxworks, others?) we provide |
| -- a minimal body for System.Rpc that only supplies an implementation of |
| -- Partition_Id. |
| |
| function Find_Local_Entity (E : RE_Id) return Entity_Id; |
| -- This function is used when entity E is in this compilation's main |
| -- unit. It gets the value from the already compiled declaration. |
| |
| --------------- |
| -- Check_RPC -- |
| --------------- |
| |
| procedure Check_RPC is |
| begin |
| -- Bypass this check if debug flag -gnatdR set |
| |
| if Debug_Flag_RR then |
| return; |
| end if; |
| |
| -- Otherwise we need the check if we are going after one of the |
| -- critical entities in System.RPC / System.Partition_Interface. |
| |
| if E = RE_Do_Rpc |
| or else |
| E = RE_Do_Apc |
| or else |
| E = RE_Params_Stream_Type |
| or else |
| E = RE_Request_Access |
| then |
| -- If generating RCI stubs, check that we have a real PCS |
| |
| if (Distribution_Stub_Mode = Generate_Receiver_Stub_Body |
| or else |
| Distribution_Stub_Mode = Generate_Caller_Stub_Body) |
| and then Get_PCS_Name = Name_No_DSA |
| then |
| Set_Standard_Error; |
| Write_Str ("distribution feature not supported"); |
| Write_Eol; |
| raise Unrecoverable_Error; |
| |
| -- In all cases, check Exp_Dist and System.Partition_Interface |
| -- consistency. |
| |
| elsif Get_PCS_Version /= |
| Exp_Dist.PCS_Version_Number (Get_PCS_Name) |
| then |
| Set_Standard_Error; |
| Write_Str ("PCS version mismatch: expander "); |
| Write_Int (Exp_Dist.PCS_Version_Number (Get_PCS_Name)); |
| Write_Str (", PCS ("); |
| Write_Name (Get_PCS_Name); |
| Write_Str (") "); |
| Write_Int (Get_PCS_Version); |
| Write_Eol; |
| raise Unrecoverable_Error; |
| end if; |
| end if; |
| end Check_RPC; |
| |
| ----------------------- |
| -- Find_Local_Entity -- |
| ----------------------- |
| |
| function Find_Local_Entity (E : RE_Id) return Entity_Id is |
| RE_Str : constant String := RE_Id'Image (E); |
| Nam : Name_Id; |
| Ent : Entity_Id; |
| |
| Save_Nam : constant String := Name_Buffer (1 .. Name_Len); |
| -- Save name buffer and length over call |
| |
| begin |
| Name_Len := Natural'Max (0, RE_Str'Length - 3); |
| Name_Buffer (1 .. Name_Len) := |
| RE_Str (RE_Str'First + 3 .. RE_Str'Last); |
| |
| Nam := Name_Find; |
| Ent := Entity_Id (Get_Name_Table_Int (Nam)); |
| |
| Name_Len := Save_Nam'Length; |
| Name_Buffer (1 .. Name_Len) := Save_Nam; |
| |
| return Ent; |
| end Find_Local_Entity; |
| |
| -- Start of processing for RTE |
| |
| begin |
| -- Doing a rtsfind in system.ads is special, as we cannot do this |
| -- when compiling System itself. So if we are compiling system then |
| -- we should already have acquired and processed the declaration |
| -- of the entity. The test is to see if this compilation's main unit |
| -- is System. If so, return the value from the already compiled |
| -- declaration and otherwise do a regular find. |
| |
| -- Not pleasant, but these kinds of annoying recursion when |
| -- writing an Ada compiler in Ada have to be broken somewhere. |
| |
| if Present (Main_Unit_Entity) |
| and then Chars (Main_Unit_Entity) = Name_System |
| and then Analyzed (Main_Unit_Entity) |
| and then not Is_Child_Unit (Main_Unit_Entity) |
| then |
| return Check_CRT (E, Find_Local_Entity (E)); |
| end if; |
| |
| Save_Front_End_Inlining := Front_End_Inlining; |
| Front_End_Inlining := False; |
| |
| -- Load unit if unit not previously loaded |
| |
| if No (RE_Table (E)) then |
| Load_RTU (U_Id, Id => E); |
| Lib_Unit := Unit (Cunit (U.Unum)); |
| |
| -- In the subprogram case, we are all done, the entity we want |
| -- is the entity for the subprogram itself. Note that we do not |
| -- bother to check that it is the entity that was requested. |
| -- the only way that could fail to be the case is if runtime is |
| -- hopelessly misconfigured, and it isn't worth testing for this. |
| |
| if Nkind (Lib_Unit) = N_Subprogram_Declaration then |
| RE_Table (E) := U.Entity; |
| |
| -- Otherwise we must have the package case. First check package |
| -- entity itself (e.g. RTE_Name for System.Interrupts.Name) |
| |
| else |
| pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration); |
| Ename := RE_Chars (E); |
| |
| -- First we search the package entity chain. If the package |
| -- only has a limited view, scan the corresponding list of |
| -- incomplete types. |
| |
| if From_Limited_With (U.Entity) then |
| Pkg_Ent := First_Entity (Limited_View (U.Entity)); |
| else |
| Pkg_Ent := First_Entity (U.Entity); |
| end if; |
| |
| while Present (Pkg_Ent) loop |
| if Ename = Chars (Pkg_Ent) then |
| RE_Table (E) := Pkg_Ent; |
| Check_RPC; |
| goto Found; |
| end if; |
| |
| Next_Entity (Pkg_Ent); |
| end loop; |
| |
| -- If we did not find the entity in the package entity chain, |
| -- then check if the package entity itself matches. Note that |
| -- we do this check after searching the entity chain, since |
| -- the rule is that in case of ambiguity, we prefer the entity |
| -- defined within the package, rather than the package itself. |
| |
| if Ename = Chars (U.Entity) then |
| RE_Table (E) := U.Entity; |
| end if; |
| |
| -- If we didn't find the entity we want, something is wrong. |
| -- We just leave RE_Table (E) set to Empty and the appropriate |
| -- action will be taken by Check_CRT when we exit. |
| |
| end if; |
| end if; |
| |
| <<Found>> |
| Maybe_Add_With (U); |
| |
| Front_End_Inlining := Save_Front_End_Inlining; |
| return Check_CRT (E, RE_Table (E)); |
| end RTE; |
| |
| ------------------- |
| -- RTE_Available -- |
| ------------------- |
| |
| function RTE_Available (E : RE_Id) return Boolean is |
| Dummy : Entity_Id; |
| pragma Warnings (Off, Dummy); |
| |
| Result : Boolean; |
| |
| Save_RTE_Available_Call : constant Boolean := RTE_Available_Call; |
| Save_RTE_Is_Available : constant Boolean := RTE_Is_Available; |
| -- These are saved recursively because the call to load a unit |
| -- caused by an upper level call may perform a recursive call |
| -- to this routine during analysis of the corresponding unit. |
| |
| begin |
| RTE_Available_Call := True; |
| RTE_Is_Available := True; |
| Dummy := RTE (E); |
| Result := RTE_Is_Available; |
| RTE_Available_Call := Save_RTE_Available_Call; |
| RTE_Is_Available := Save_RTE_Is_Available; |
| return Result; |
| |
| exception |
| when RE_Not_Available => |
| RTE_Available_Call := Save_RTE_Available_Call; |
| RTE_Is_Available := Save_RTE_Is_Available; |
| return False; |
| end RTE_Available; |
| |
| -------------------------- |
| -- RTE_Record_Component -- |
| -------------------------- |
| |
| function RTE_Record_Component (E : RE_Id) return Entity_Id is |
| U_Id : constant RTU_Id := RE_Unit_Table (E); |
| U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id); |
| E1 : Entity_Id; |
| Ename : Name_Id; |
| Found_E : Entity_Id; |
| Lib_Unit : Node_Id; |
| Pkg_Ent : Entity_Id; |
| |
| -- The following flag is used to disable front-end inlining when |
| -- RTE_Record_Component is invoked. This prevents the analysis of other |
| -- runtime bodies when a particular spec is loaded through Rtsfind. This |
| -- is both efficient, and it prevents spurious visibility conflicts |
| -- between use-visible user entities, and entities in run-time packages. |
| |
| Save_Front_End_Inlining : Boolean; |
| |
| begin |
| -- Note: Contrary to subprogram RTE, there is no need to do any special |
| -- management with package system.ads because it has no record type |
| -- declarations. |
| |
| Save_Front_End_Inlining := Front_End_Inlining; |
| Front_End_Inlining := False; |
| |
| -- Load unit if unit not previously loaded |
| |
| if not Present (U.Entity) then |
| Load_RTU (U_Id, Id => E); |
| end if; |
| |
| Lib_Unit := Unit (Cunit (U.Unum)); |
| |
| pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration); |
| Ename := RE_Chars (E); |
| |
| -- Search the entity in the components of record type declarations |
| -- found in the package entity chain. |
| |
| Found_E := Empty; |
| Pkg_Ent := First_Entity (U.Entity); |
| Search : while Present (Pkg_Ent) loop |
| if Is_Record_Type (Pkg_Ent) then |
| E1 := First_Entity (Pkg_Ent); |
| while Present (E1) loop |
| if Ename = Chars (E1) then |
| pragma Assert (not Present (Found_E)); |
| Found_E := E1; |
| end if; |
| |
| Next_Entity (E1); |
| end loop; |
| end if; |
| |
| Next_Entity (Pkg_Ent); |
| end loop Search; |
| |
| -- If we didn't find the entity we want, something is wrong. The |
| -- appropriate action will be taken by Check_CRT when we exit. |
| |
| Maybe_Add_With (U); |
| |
| Front_End_Inlining := Save_Front_End_Inlining; |
| return Check_CRT (E, Found_E); |
| end RTE_Record_Component; |
| |
| ------------------------------------ |
| -- RTE_Record_Component_Available -- |
| ------------------------------------ |
| |
| function RTE_Record_Component_Available (E : RE_Id) return Boolean is |
| Dummy : Entity_Id; |
| pragma Warnings (Off, Dummy); |
| |
| Result : Boolean; |
| |
| Save_RTE_Available_Call : constant Boolean := RTE_Available_Call; |
| Save_RTE_Is_Available : constant Boolean := RTE_Is_Available; |
| -- These are saved recursively because the call to load a unit |
| -- caused by an upper level call may perform a recursive call |
| -- to this routine during analysis of the corresponding unit. |
| |
| begin |
| RTE_Available_Call := True; |
| RTE_Is_Available := True; |
| Dummy := RTE_Record_Component (E); |
| Result := RTE_Is_Available; |
| RTE_Available_Call := Save_RTE_Available_Call; |
| RTE_Is_Available := Save_RTE_Is_Available; |
| return Result; |
| |
| exception |
| when RE_Not_Available => |
| RTE_Available_Call := Save_RTE_Available_Call; |
| RTE_Is_Available := Save_RTE_Is_Available; |
| return False; |
| end RTE_Record_Component_Available; |
| |
| ------------------- |
| -- RTE_Error_Msg -- |
| ------------------- |
| |
| procedure RTE_Error_Msg (Msg : String) is |
| begin |
| if RTE_Available_Call then |
| RTE_Is_Available := False; |
| else |
| Error_Msg_N (Msg, Current_Error_Node); |
| |
| -- Bump count of violations if we are in configurable run-time |
| -- mode and this is not a continuation message. |
| |
| if Configurable_Run_Time_Mode and then Msg (Msg'First) /= '\' then |
| Configurable_Run_Time_Violations := |
| Configurable_Run_Time_Violations + 1; |
| end if; |
| end if; |
| end RTE_Error_Msg; |
| |
| ---------------- |
| -- RTU_Entity -- |
| ---------------- |
| |
| function RTU_Entity (U : RTU_Id) return Entity_Id is |
| begin |
| return RT_Unit_Table (U).Entity; |
| end RTU_Entity; |
| |
| ---------------- |
| -- RTU_Loaded -- |
| ---------------- |
| |
| function RTU_Loaded (U : RTU_Id) return Boolean is |
| begin |
| return Present (RT_Unit_Table (U).Entity); |
| end RTU_Loaded; |
| |
| -------------------- |
| -- Set_RTU_Loaded -- |
| -------------------- |
| |
| procedure Set_RTU_Loaded (N : Node_Id) is |
| Loc : constant Source_Ptr := Sloc (N); |
| Unum : constant Unit_Number_Type := Get_Source_Unit (Loc); |
| Uname : constant Unit_Name_Type := Unit_Name (Unum); |
| E : constant Entity_Id := |
| Defining_Entity (Unit (Cunit (Unum))); |
| begin |
| pragma Assert (Is_Predefined_File_Name (Unit_File_Name (Unum))); |
| |
| -- Loop through entries in RTU table looking for matching entry |
| |
| for U_Id in RTU_Id'Range loop |
| |
| -- Here we have a match |
| |
| if Get_Unit_Name (U_Id) = Uname then |
| declare |
| U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id); |
| -- The RT_Unit_Table entry that may need updating |
| |
| begin |
| -- If entry is not set, set it now, and indicate that it was |
| -- loaded through an explicit context clause. |
| |
| if No (U.Entity) then |
| U := (Entity => E, |
| Uname => Get_Unit_Name (U_Id), |
| Unum => Unum, |
| First_Implicit_With => Empty); |
| end if; |
| |
| return; |
| end; |
| end if; |
| end loop; |
| end Set_RTU_Loaded; |
| |
| end Rtsfind; |
