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Diffstat (limited to 'gcc-4.8/gcc/ada/rtsfind.adb')
| -rw-r--r-- | gcc-4.8/gcc/ada/rtsfind.adb | 1520 |
1 files changed, 0 insertions, 1520 deletions
diff --git a/gcc-4.8/gcc/ada/rtsfind.adb b/gcc-4.8/gcc/ada/rtsfind.adb deleted file mode 100644 index 5327da54a..000000000 --- a/gcc-4.8/gcc/ada/rtsfind.adb +++ /dev/null @@ -1,1520 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- R T S F I N D -- --- -- --- B o d y -- --- -- --- Copyright (C) 1992-2013, 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 Inspector. 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 SofCheck Inspector. - - -- The field First_Implicit_With in the unit table record are used to - -- avoid creating duplicate with_clauses. - - ----------------------- - -- 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). - - 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 Text_IO_Kludge 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. This call - -- is only effective in All_Errors mode. - - 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 not 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) - 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; - - ------------------------ - -- 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; - - 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 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_Kludge_Unit -- - ---------------------------- - - function Is_Text_IO_Kludge_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 - (Chars (Prf) = Name_Text_IO - or else - Chars (Prf) = Name_Wide_Text_IO - or else - Chars (Prf) = Name_Wide_Wide_Text_IO) - and then - Nkind (Sel) = N_Identifier - and then - Chars (Sel) in Text_IO_Package_Name; - end Is_Text_IO_Kludge_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; - - -- Start of processing for Load_RTU - - begin - -- Nothing to do if unit is already loaded - - if Present (U.Entity) then - return; - end if; - - -- 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) 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_With_Type (Cunit_Entity (U.Unum)) then - null; - - else - Save_Private_Visibility; - Semantics (Cunit (U.Unum)); - Restore_Private_Visibility; - - if Fatal_Error (U.Unum) 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; - 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_Reference_To (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_Reference_To (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 then 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 not already in the context of 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 (VMS, 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_Info (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_With_Type (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; - - -------------------- - -- Text_IO_Kludge -- - -------------------- - - procedure Text_IO_Kludge (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 Text_IO_Kludge; - -end Rtsfind; |