-- types with defaulted discriminant of an integer type, when the bound
-- of some entry family depends on a discriminant. The limitation to
-- entry families of 128K should be reasonable in all cases, and is a
- -- documented implementation restriction. It will be lifted when protected
- -- entry families are re-implemented as a single ordered queue.
+ -- documented implementation restriction.
Entry_Family_Bound : constant Int := 2**16;
-- body or an accept body. The renamed object is a component of the
-- parameter block that is a parameter in the entry call.
- -- In Ada2012, If the formal is an incomplete tagged type, the renaming
+ -- In Ada 2012, if the formal is an incomplete tagged type, the renaming
-- does not dereference the corresponding component to prevent an illegal
-- use of the incomplete type (AI05-0151).
-- to handle properly the case of bounds that depend on discriminants.
-- If Cap is true, the result is capped according to Entry_Family_Bound.
+ procedure Find_Enclosing_Context
+ (N : Node_Id;
+ Context : out Node_Id;
+ Context_Id : out Entity_Id;
+ Context_Decls : out List_Id);
+ -- Subsidiary routine to procedures Build_Activation_Chain_Entity and
+ -- Build_Master_Entity. Given an arbitrary node in the tree, find the
+ -- nearest enclosing body, block, package or return statement and return
+ -- its constituents. Context is the enclosing construct, Context_Id is
+ -- the scope of Context_Id and Context_Decls is the declarative list of
+ -- Context.
+
procedure Extract_Dispatching_Call
(N : Node_Id;
Call_Ent : out Entity_Id;
-----------------------------------
procedure Build_Activation_Chain_Entity (N : Node_Id) is
- P : Node_Id;
- Decls : List_Id;
- Chain : Entity_Id;
+ function Has_Activation_Chain (Stmt : Node_Id) return Boolean;
+ -- Determine whether an extended return statement has an activation
+ -- chain.
- begin
- -- Loop to find enclosing construct containing activation chain variable
- -- The construct is a body, a block, or an extended return.
-
- P := Parent (N);
-
- while not Nkind_In (P, N_Subprogram_Body,
- N_Entry_Body,
- N_Package_Declaration,
- N_Package_Body,
- N_Block_Statement,
- N_Task_Body,
- N_Extended_Return_Statement)
- loop
- P := Parent (P);
- end loop;
+ --------------------------
+ -- Has_Activation_Chain --
+ --------------------------
+
+ function Has_Activation_Chain (Stmt : Node_Id) return Boolean is
+ Decl : Node_Id;
+
+ begin
+ Decl := First (Return_Object_Declarations (Stmt));
+ while Present (Decl) loop
+ if Nkind (Decl) = N_Object_Declaration
+ and then Chars (Defining_Identifier (Decl)) = Name_uChain
+ then
+ return True;
+ end if;
- -- If we are in a package body, the activation chain variable is
- -- declared in the body, but the Activation_Chain_Entity is attached
- -- to the spec.
+ Next (Decl);
+ end loop;
- if Nkind (P) = N_Package_Body then
- Decls := Declarations (P);
- P := Unit_Declaration_Node (Corresponding_Spec (P));
+ return False;
+ end Has_Activation_Chain;
- elsif Nkind (P) = N_Package_Declaration then
- Decls := Visible_Declarations (Specification (P));
+ -- Local variables
- elsif Nkind (P) = N_Extended_Return_Statement then
- Decls := Return_Object_Declarations (P);
+ Context : Node_Id;
+ Context_Id : Entity_Id;
+ Decls : List_Id;
- else
- Decls := Declarations (P);
- end if;
+ -- Start of processing for Build_Activation_Chain_Entity
+
+ begin
+ Find_Enclosing_Context (N, Context, Context_Id, Decls);
- -- If activation chain entity not already declared, declare it
+ -- If an activation chain entity has not been declared already, create
+ -- one.
- if Nkind (P) = N_Extended_Return_Statement
- or else No (Activation_Chain_Entity (P))
+ if Nkind (Context) = N_Extended_Return_Statement
+ or else No (Activation_Chain_Entity (Context))
then
- Chain := Make_Defining_Identifier (Sloc (N), Name_uChain);
-
- -- Note: An extended return statement is not really a task activator,
- -- but it does have an activation chain on which to store the tasks
- -- temporarily. On successful return, the tasks on this chain are
- -- moved to the chain passed in by the caller. We do not build an
- -- Activation_Chain_Entity for an N_Extended_Return_Statement,
- -- because we do not want to build a call to Activate_Tasks. Task
- -- activation is the responsibility of the caller.
-
- if Nkind (P) /= N_Extended_Return_Statement then
- Set_Activation_Chain_Entity (P, Chain);
+ -- Since extended return statements do not store the entity of the
+ -- chain, examine the return object declarations to avoid creating
+ -- a duplicate.
+
+ if Nkind (Context) = N_Extended_Return_Statement
+ and then Has_Activation_Chain (Context)
+ then
+ return;
end if;
- Prepend_To (Decls,
- Make_Object_Declaration (Sloc (P),
- Defining_Identifier => Chain,
- Aliased_Present => True,
- Object_Definition =>
- New_Reference_To (RTE (RE_Activation_Chain), Sloc (P))));
+ declare
+ Loc : constant Source_Ptr := Sloc (Context);
+ Chain : Entity_Id;
+ Decl : Node_Id;
+
+ begin
+ Chain := Make_Defining_Identifier (Sloc (N), Name_uChain);
+
+ -- Note: An extended return statement is not really a task
+ -- activator, but it does have an activation chain on which to
+ -- store the tasks temporarily. On successful return, the tasks
+ -- on this chain are moved to the chain passed in by the caller.
+ -- We do not build an Activation_Chain_Entity for an extended
+ -- return statement, because we do not want to build a call to
+ -- Activate_Tasks. Task activation is the responsibility of the
+ -- caller.
+
+ if Nkind (Context) /= N_Extended_Return_Statement then
+ Set_Activation_Chain_Entity (Context, Chain);
+ end if;
+
+ Decl :=
+ Make_Object_Declaration (Loc,
+ Defining_Identifier => Chain,
+ Aliased_Present => True,
+ Object_Definition =>
+ New_Reference_To (RTE (RE_Activation_Chain), Loc));
+
+ Prepend_To (Decls, Decl);
- Analyze (First (Decls));
+ -- Ensure that the _chain appears in the proper scope of the
+ -- context.
+
+ if Context_Id /= Current_Scope then
+ Push_Scope (Context_Id);
+ Analyze (Decl);
+ Pop_Scope;
+ else
+ Analyze (Decl);
+ end if;
+ end;
end if;
end Build_Activation_Chain_Entity;
Parameter_Associations => New_List (Concurrent_Ref (N)));
end Build_Call_With_Task;
+ -----------------------------
+ -- Build_Class_Wide_Master --
+ -----------------------------
+
+ procedure Build_Class_Wide_Master (Typ : Entity_Id) is
+ Loc : constant Source_Ptr := Sloc (Typ);
+ Master_Id : Entity_Id;
+ Master_Scope : Entity_Id;
+ Name_Id : Node_Id;
+ Related_Node : Node_Id;
+ Ren_Decl : Node_Id;
+
+ begin
+ -- Nothing to do if there is no task hierarchy
+
+ if Restriction_Active (No_Task_Hierarchy) then
+ return;
+ end if;
+
+ -- Find the declaration that created the access type. It is either a
+ -- type declaration, or an object declaration with an access definition,
+ -- in which case the type is anonymous.
+
+ if Is_Itype (Typ) then
+ Related_Node := Associated_Node_For_Itype (Typ);
+ else
+ Related_Node := Parent (Typ);
+ end if;
+
+ Master_Scope := Find_Master_Scope (Typ);
+
+ -- Nothing to do if the master scope already contains a _master entity.
+ -- The only exception to this is the following scenario:
+
+ -- Source_Scope
+ -- Transient_Scope_1
+ -- _master
+
+ -- Transient_Scope_2
+ -- use of master
+
+ -- In this case the source scope is marked as having the master entity
+ -- even though the actual declaration appears inside an inner scope. If
+ -- the second transient scope requires a _master, it cannot use the one
+ -- already declared because the entity is not visible.
+
+ Name_Id := Make_Identifier (Loc, Name_uMaster);
+
+ if not Has_Master_Entity (Master_Scope)
+ or else No (Current_Entity_In_Scope (Name_Id))
+ then
+ declare
+ Master_Decl : Node_Id;
+
+ begin
+ Set_Has_Master_Entity (Master_Scope);
+
+ -- Generate:
+ -- _master : constant Integer := Current_Master.all;
+
+ Master_Decl :=
+ Make_Object_Declaration (Loc,
+ Defining_Identifier =>
+ Make_Defining_Identifier (Loc, Name_uMaster),
+ Constant_Present => True,
+ Object_Definition =>
+ New_Reference_To (Standard_Integer, Loc),
+ Expression =>
+ Make_Explicit_Dereference (Loc,
+ New_Reference_To (RTE (RE_Current_Master), Loc)));
+
+ Insert_Action (Related_Node, Master_Decl);
+ Analyze (Master_Decl);
+
+ -- Mark the containing scope as a task master. Masters associated
+ -- with return statements are already marked at this stage (see
+ -- Analyze_Subprogram_Body).
+
+ if Ekind (Current_Scope) /= E_Return_Statement then
+ declare
+ Par : Node_Id := Related_Node;
+
+ begin
+ while Nkind (Par) /= N_Compilation_Unit loop
+ Par := Parent (Par);
+
+ -- If we fall off the top, we are at the outer level, and
+ -- the environment task is our effective master, so
+ -- nothing to mark.
+
+ if Nkind_In (Par, N_Block_Statement,
+ N_Subprogram_Body,
+ N_Task_Body)
+ then
+ Set_Is_Task_Master (Par);
+ exit;
+ end if;
+ end loop;
+ end;
+ end if;
+ end;
+ end if;
+
+ Master_Id :=
+ Make_Defining_Identifier (Loc,
+ New_External_Name (Chars (Typ), 'M'));
+
+ -- Generate:
+ -- Mnn renames _master;
+
+ Ren_Decl :=
+ Make_Object_Renaming_Declaration (Loc,
+ Defining_Identifier => Master_Id,
+ Subtype_Mark => New_Reference_To (Standard_Integer, Loc),
+ Name => Name_Id);
+
+ Insert_Action (Related_Node, Ren_Decl);
+
+ Set_Master_Id (Typ, Master_Id);
+ end Build_Class_Wide_Master;
+
--------------------------------
-- Build_Corresponding_Record --
--------------------------------
-- The parameter that designates the synchronized object in the call
Actuals : constant List_Id := New_List;
- -- the actuals in the entry call.
+ -- The actuals in the entry call
Decls : constant List_Id := New_List;
end loop Search;
end if;
- -- If the subprogram to be wrapped is not overriding anything or is not
- -- a primitive declared between two views, do not produce anything. This
- -- avoids spurious errors involving overriding.
+ -- Ada 2012 (AI05-0090-1): If no interface primitive is covered by
+ -- this subprogram and this is not a primitive declared between two
+ -- views then force the generation of a wrapper. As an optimization,
+ -- previous versions of the frontend avoid generating the wrapper;
+ -- however, the wrapper facilitates locating and reporting an error
+ -- when a duplicate declaration is found later. See example in
+ -- AI05-0090-1.
if No (First_Param)
and then not Is_Private_Primitive_Subprogram (Subp_Id)
then
- return Empty;
+ if Is_Task_Type
+ (Corresponding_Concurrent_Type (Obj_Typ))
+ then
+ First_Param :=
+ Make_Parameter_Specification (Loc,
+ Defining_Identifier => Make_Defining_Identifier (Loc, Name_uO),
+ In_Present => True,
+ Out_Present => False,
+ Parameter_Type => New_Reference_To (Obj_Typ, Loc));
+
+ -- For entries and procedures of protected types the mode of
+ -- the controlling argument must be in-out.
+
+ else
+ First_Param :=
+ Make_Parameter_Specification (Loc,
+ Defining_Identifier =>
+ Make_Defining_Identifier (Loc,
+ Chars => Name_uO),
+ In_Present => True,
+ Out_Present => (Ekind (Subp_Id) /= E_Function),
+ Parameter_Type => New_Reference_To (Obj_Typ, Loc));
+ end if;
end if;
declare
-- Build_Master_Entity --
-------------------------
- procedure Build_Master_Entity (E : Entity_Id) is
- Loc : constant Source_Ptr := Sloc (E);
- P : Node_Id;
- Decl : Node_Id;
- S : Entity_Id;
+ procedure Build_Master_Entity (Obj_Or_Typ : Entity_Id) is
+ Loc : constant Source_Ptr := Sloc (Obj_Or_Typ);
+ Context : Node_Id;
+ Context_Id : Entity_Id;
+ Decl : Node_Id;
+ Decls : List_Id;
+ Par : Node_Id;
begin
- S := Find_Master_Scope (E);
+ if Is_Itype (Obj_Or_Typ) then
+ Par := Associated_Node_For_Itype (Obj_Or_Typ);
+ else
+ Par := Parent (Obj_Or_Typ);
+ end if;
- -- Nothing to do if we already built a master entity for this scope
- -- or if there is no task hierarchy.
+ -- When creating a master for a record component which is either a task
+ -- or access-to-task, the enclosing record is the master scope and the
+ -- proper insertion point is the component list.
- if Has_Master_Entity (S)
+ if Is_Record_Type (Current_Scope) then
+ Context := Par;
+ Context_Id := Current_Scope;
+ Decls := List_Containing (Context);
+
+ -- Default case for object declarations and access types. Note that the
+ -- context is updated to the nearest enclosing body, block, package or
+ -- return statement.
+
+ else
+ Find_Enclosing_Context (Par, Context, Context_Id, Decls);
+ end if;
+
+ -- Do not create a master if one already exists or there is no task
+ -- hierarchy.
+
+ if Has_Master_Entity (Context_Id)
or else Restriction_Active (No_Task_Hierarchy)
then
return;
end if;
- -- Otherwise first build the master entity
+ -- Create a master, generate:
-- _Master : constant Master_Id := Current_Master.all;
- -- and insert it just before the current declaration
Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier =>
Make_Defining_Identifier (Loc, Name_uMaster),
- Constant_Present => True,
- Object_Definition => New_Reference_To (RTE (RE_Master_Id), Loc),
- Expression =>
+ Constant_Present => True,
+ Object_Definition => New_Reference_To (RTE (RE_Master_Id), Loc),
+ Expression =>
Make_Explicit_Dereference (Loc,
New_Reference_To (RTE (RE_Current_Master), Loc)));
- P := Parent (E);
- Insert_Before (P, Decl);
- Analyze (Decl);
+ -- The master is inserted at the start of the declarative list of the
+ -- context.
- Set_Has_Master_Entity (S);
+ Prepend_To (Decls, Decl);
- -- Now mark the containing scope as a task master
+ -- In certain cases where transient scopes are involved, the immediate
+ -- scope is not always the proper master scope. Ensure that the master
+ -- declaration and entity appear in the same context.
+
+ if Context_Id /= Current_Scope then
+ Push_Scope (Context_Id);
+ Analyze (Decl);
+ Pop_Scope;
+ else
+ Analyze (Decl);
+ end if;
- while Nkind (P) /= N_Compilation_Unit loop
- P := Parent (P);
+ -- Mark the enclosing scope and its associated construct as being task
+ -- masters.
- -- If we fall off the top, we are at the outer level, and the
- -- environment task is our effective master, so nothing to mark.
+ Set_Has_Master_Entity (Context_Id);
- if Nkind_In
- (P, N_Task_Body, N_Block_Statement, N_Subprogram_Body)
+ while Present (Context)
+ and then Nkind (Context) /= N_Compilation_Unit
+ loop
+ if Nkind_In (Context, N_Block_Statement,
+ N_Subprogram_Body,
+ N_Task_Body)
then
- Set_Is_Task_Master (P, True);
- return;
+ Set_Is_Task_Master (Context);
+ exit;
- elsif Nkind (Parent (P)) = N_Subunit then
- P := Corresponding_Stub (Parent (P));
+ elsif Nkind (Parent (Context)) = N_Subunit then
+ Context := Corresponding_Stub (Parent (Context));
end if;
+
+ Context := Parent (Context);
end loop;
end Build_Master_Entity;
+ ---------------------------
+ -- Build_Master_Renaming --
+ ---------------------------
+
+ procedure Build_Master_Renaming
+ (Ptr_Typ : Entity_Id;
+ Ins_Nod : Node_Id := Empty)
+ is
+ Loc : constant Source_Ptr := Sloc (Ptr_Typ);
+ Context : Node_Id;
+ Master_Decl : Node_Id;
+ Master_Id : Entity_Id;
+
+ begin
+ -- Nothing to do if there is no task hierarchy
+
+ if Restriction_Active (No_Task_Hierarchy) then
+ return;
+ end if;
+
+ -- Determine the proper context to insert the master renaming
+
+ if Present (Ins_Nod) then
+ Context := Ins_Nod;
+ elsif Is_Itype (Ptr_Typ) then
+ Context := Associated_Node_For_Itype (Ptr_Typ);
+ else
+ Context := Parent (Ptr_Typ);
+ end if;
+
+ -- Generate:
+ -- <Ptr_Typ>M : Master_Id renames _Master;
+
+ Master_Id :=
+ Make_Defining_Identifier (Loc,
+ New_External_Name (Chars (Ptr_Typ), 'M'));
+
+ Master_Decl :=
+ Make_Object_Renaming_Declaration (Loc,
+ Defining_Identifier => Master_Id,
+ Subtype_Mark => New_Reference_To (RTE (RE_Master_Id), Loc),
+ Name => Make_Identifier (Loc, Name_uMaster));
+
+ Insert_Action (Context, Master_Decl);
+
+ -- The renamed master now services the access type
+
+ Set_Master_Id (Ptr_Typ, Master_Id);
+ end Build_Master_Renaming;
+
-----------------------------------------
-- Build_Private_Protected_Declaration --
-----------------------------------------
raise Program_Error;
end case;
- -- Establish link between subprogram body entity and source entry.
+ -- Establish link between subprogram body entity and source entry
Set_Corresponding_Protected_Entry (Edef, Ent);
Stmts : List_Id;
Object_Parm : Node_Id;
Exc_Safe : Boolean;
+ Lock_Kind : RE_Id;
function Is_Exception_Safe (Subprogram : Node_Id) return Boolean;
-- Tell whether a given subprogram cannot raise an exception
Parameter_Associations => Uactuals));
end if;
+ Lock_Kind := RE_Lock_Read_Only;
+
else
Unprot_Call :=
Make_Procedure_Call_Statement (Loc,
Name =>
Make_Identifier (Loc, Chars (Defining_Unit_Name (N_Op_Spec))),
Parameter_Associations => Uactuals);
+
+ Lock_Kind := RE_Lock;
end if;
-- Wrap call in block that will be covered by an at_end handler
Service_Name := New_Reference_To (RTE (RE_Service_Entry), Loc);
when System_Tasking_Protected_Objects =>
- Lock_Name := New_Reference_To (RTE (RE_Lock), Loc);
+ Lock_Name := New_Reference_To (RTE (Lock_Kind), Loc);
Service_Name := New_Reference_To (RTE (RE_Unlock), Loc);
when others =>
Make_Object_Declaration (Loc,
Defining_Identifier => Chain,
- Aliased_Present => True,
+ Aliased_Present => True,
Object_Definition =>
New_Reference_To (RTE (RE_Activation_Chain), Loc))),
Ldecl2 : Node_Id;
begin
- if Expander_Active then
+ if Full_Expander_Active then
-- If we have no handled statement sequence, we may need to build
-- a dummy sequence consisting of a null statement. This can be
then
Set_Handled_Statement_Sequence (N,
Make_Handled_Sequence_Of_Statements (Loc,
- New_List (Make_Null_Statement (Loc))));
+ Statements => New_List (Make_Null_Statement (Loc))));
end if;
-- Create and declare two labels to be placed at the end of the
Comps := New_List (
Make_Component_Declaration (Loc,
- Defining_Identifier => Make_Temporary (Loc, 'P'),
+ Defining_Identifier => Make_Temporary (Loc, 'P'),
Component_Definition =>
Make_Component_Definition (Loc,
Aliased_Present => False,
Decl2 :=
Make_Full_Type_Declaration (Loc,
Defining_Identifier => E_T,
- Type_Definition =>
+ Type_Definition =>
Make_Record_Definition (Loc,
Component_List =>
- Make_Component_List (Loc,
- Component_Items => Comps)));
+ Make_Component_List (Loc, Component_Items => Comps)));
Insert_After (Decl1, Decl2);
Analyze (Decl2);
-- barrier just as a protected function, and discard the protected
-- version of it because it is never called.
- if Expander_Active then
+ if Full_Expander_Active then
B_F := Build_Barrier_Function (N, Ent, Prot);
Func := Barrier_Function (Ent);
Set_Corresponding_Spec (B_F, Func);
-- condition does not reference any of the generated renamings
-- within the function.
- if Expander_Active
+ if Full_Expander_Active
and then Scope (Entity (Cond)) /= Func
then
Set_Declarations (B_F, Empty_List);
Tasknm : Node_Id;
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
Aggr := Make_Aggregate (Loc, Component_Associations => New_List);
Count := 0;
-- Start of processing for Expand_N_Accept_Statement
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
-- If accept statement is not part of a list, then its parent must be
-- an accept alternative, and, as described above, we do not do any
-- expansion for such accept statements at this level.
T : Entity_Id; -- Additional status flag
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
Process_Statements_For_Controlled_Objects (Trig);
Process_Statements_For_Controlled_Objects (Abrt);
S : Entity_Id; -- Primitive operation slot
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
Process_Statements_For_Controlled_Objects (N);
if Ada_Version >= Ada_2005
procedure Expand_N_Delay_Relative_Statement (N : Node_Id) is
Loc : constant Source_Ptr := Sloc (N);
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
Rewrite (N,
Make_Procedure_Call_Statement (Loc,
Name => New_Reference_To (RTE (RO_CA_Delay_For), Loc),
Typ : Entity_Id;
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
if Is_RTE (Base_Type (Etype (Expression (N))), RO_CA_Time) then
Typ := RTE (RO_CA_Delay_Until);
else
procedure Expand_N_Entry_Body (N : Node_Id) is
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
-- Associate discriminals with the next protected operation body to be
-- expanded.
Index : Node_Id;
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
if No_Run_Time_Mode then
Error_Msg_CRT ("entry call", N);
return;
Acc_Ent : Entity_Id;
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
Formal := First_Formal (Entry_Ent);
Last_Decl := N;
-- Start of processing for Expand_N_Protected_Body
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
if No_Run_Time_Mode then
Error_Msg_CRT ("protected body", N);
return;
Make_Integer_Literal (Loc, Num_Attach_Handler))));
end if;
- elsif Has_Interrupt_Handler (Prot_Typ) then
+ elsif Has_Interrupt_Handler (Prot_Typ)
+ and then not Restriction_Active (No_Dynamic_Attachment)
+ then
Protection_Subtype :=
Make_Subtype_Indication (
Sloc => Loc,
Insert_After (Current_Node, Sub);
Analyze (Sub);
- -- build wrapper procedure for pre/postconditions.
+ -- Build wrapper procedure for pre/postconditions
Build_PPC_Wrapper (Comp_Id, N);
-- Start of processing for Expand_N_Requeue_Statement
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
-- Extract the components of the entry call
Extract_Entry (N, Concval, Ename, Index);
-- Start of processing for Expand_N_Selective_Accept
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
Process_Statements_For_Controlled_Objects (N);
-- First insert some declarations before the select. The first is:
-- Used to determine the proper location of wrapper body insertions
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
-- Add renaming declarations for discriminals and a declaration for the
-- entry family index (if applicable).
-- values of this task. The general form of this type declaration is
-- type taskV (discriminants) is record
- -- _Task_Id : Task_Id;
- -- entry_family : array (bounds) of Void;
- -- _Priority : Integer := priority_expression;
- -- _Size : Size_Type := Size_Type (size_expression);
- -- _Task_Info : Task_Info_Type := task_info_expression;
- -- _CPU : Integer := cpu_range_expression;
+ -- _Task_Id : Task_Id;
+ -- entry_family : array (bounds) of Void;
+ -- _Priority : Integer := priority_expression;
+ -- _Size : Size_Type := size_expression;
+ -- _Task_Info : Task_Info_Type := task_info_expression;
+ -- _CPU : Integer := cpu_range_expression;
+ -- _Relative_Deadline : Time_Span := time_span_expression;
+ -- _Domain : Dispatching_Domain := dd_expression;
-- end record;
-- The discriminants are present only if the corresponding task type has
-- argument that was present in the pragma, and is used to provide the
-- Relative_Deadline parameter to the call to Create_Task.
+ -- The _Domain field is present only if a Dispatching_Domain pragma or
+ -- aspect appears in the task definition. The expression captures the
+ -- argument that was present in the pragma or aspect, and is used to
+ -- provide the Dispatching_Domain parameter to the call to Create_Task.
+
-- When a task is declared, an instance of the task value record is
-- created. The elaboration of this declaration creates the correct bounds
-- for the entry families, and also evaluates the size, priority, and
Decl_Stack : Node_Id;
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
-- If already expanded, nothing to do
if Present (Corresponding_Record_Type (Tasktyp)) then
Make_Defining_Identifier (Sloc (Tasktyp),
Chars => New_External_Name (Tasknm, 'Z')));
- if Present (Taskdef) and then Has_Storage_Size_Pragma (Taskdef) and then
- Is_Static_Expression (Expression (First (
- Pragma_Argument_Associations (Find_Task_Or_Protected_Pragma (
- Taskdef, Name_Storage_Size)))))
+ if Present (Taskdef)
+ and then Has_Storage_Size_Pragma (Taskdef)
+ and then
+ Is_Static_Expression
+ (Expression
+ (First (Pragma_Argument_Associations
+ (Find_Task_Or_Protected_Pragma
+ (Taskdef, Name_Storage_Size)))))
then
Size_Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Storage_Size_Variable (Tasktyp),
- Object_Definition => New_Reference_To (RTE (RE_Size_Type), Loc),
- Expression =>
+ Object_Definition => New_Reference_To (RTE (RE_Size_Type), Loc),
+ Expression =>
Convert_To (RTE (RE_Size_Type),
- Relocate_Node (
- Expression (First (
- Pragma_Argument_Associations (
- Find_Task_Or_Protected_Pragma
- (Taskdef, Name_Storage_Size)))))));
+ Relocate_Node
+ (Expression (First (Pragma_Argument_Associations
+ (Find_Task_Or_Protected_Pragma
+ (Taskdef, Name_Storage_Size)))))));
else
Size_Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Storage_Size_Variable (Tasktyp),
- Object_Definition => New_Reference_To (RTE (RE_Size_Type), Loc),
- Expression => New_Reference_To (RTE (RE_Unspecified_Size), Loc));
+ Object_Definition =>
+ New_Reference_To (RTE (RE_Size_Type), Loc),
+ Expression =>
+ New_Reference_To (RTE (RE_Unspecified_Size), Loc));
end if;
Insert_After (Elab_Decl, Size_Decl);
Append_To (Cdecls,
Make_Component_Declaration (Loc,
- Defining_Identifier =>
+ Defining_Identifier =>
Make_Defining_Identifier (Loc, Name_uTask_Id),
Component_Definition =>
Make_Component_Definition (Loc,
Make_Component_Definition (Loc,
Aliased_Present => True,
Subtype_Indication => Make_Subtype_Indication (Loc,
- Subtype_Mark => New_Occurrence_Of
- (RTE (RE_Ada_Task_Control_Block), Loc),
+ Subtype_Mark =>
+ New_Occurrence_Of (RTE (RE_Ada_Task_Control_Block), Loc),
Constraint =>
Make_Index_Or_Discriminant_Constraint (Loc,
(Taskdef, Name_Relative_Deadline))))))));
end if;
+ -- Add the _Dispatching_Domain component if a Dispatching_Domain pragma
+ -- or aspect is present. If we are using a restricted run time this
+ -- component will not be added (dispatching domains are not allowed by
+ -- the Ravenscar profile).
+
+ if not Restricted_Profile
+ and then Present (Taskdef)
+ and then Has_Pragma_Dispatching_Domain (Taskdef)
+ then
+ Append_To (Cdecls,
+ Make_Component_Declaration (Loc,
+ Defining_Identifier =>
+ Make_Defining_Identifier (Loc, Name_uDispatching_Domain),
+
+ Component_Definition =>
+ Make_Component_Definition (Loc,
+ Aliased_Present => False,
+ Subtype_Indication =>
+ New_Reference_To
+ (RTE (RE_Dispatching_Domain_Access), Loc)),
+
+ Expression =>
+ Unchecked_Convert_To (RTE (RE_Dispatching_Domain_Access),
+ Relocate_Node
+ (Expression
+ (First
+ (Pragma_Argument_Associations
+ (Find_Task_Or_Protected_Pragma
+ (Taskdef, Name_Dispatching_Domain))))))));
+ end if;
+
Insert_After (Size_Decl, Rec_Decl);
-- Analyze the record declaration immediately after construction,
S : Entity_Id; -- Primitive operation slot
begin
- -- Do not expand tasking constructs in formal verification mode
-
- if ALFA_Mode then
- return;
- end if;
-
-- Under the Ravenscar profile, timed entry calls are excluded. An error
-- was already reported on spec, so do not attempt to expand the call.
Prepend_To (Decls,
Make_Object_Declaration (Loc,
- Defining_Identifier =>
- B,
- Object_Definition =>
- New_Reference_To (Standard_Boolean, Loc)));
+ Defining_Identifier => B,
+ Object_Definition => New_Reference_To (Standard_Boolean, Loc)));
end if;
-- Duration and mode processing
elsif Is_RTE (D_Type, RO_CA_Time) then
D_Disc := Make_Integer_Literal (Loc, 1);
- D_Conv := Make_Function_Call (Loc,
- New_Reference_To (RTE (RO_CA_To_Duration), Loc),
- New_List (New_Copy (Expression (D_Stat))));
+ D_Conv :=
+ Make_Function_Call (Loc,
+ Name => New_Reference_To (RTE (RO_CA_To_Duration), Loc),
+ Parameter_Associations =>
+ New_List (New_Copy (Expression (D_Stat))));
else pragma Assert (Is_RTE (D_Type, RO_RT_Time));
D_Disc := Make_Integer_Literal (Loc, 2);
- D_Conv := Make_Function_Call (Loc,
- New_Reference_To (RTE (RO_RT_To_Duration), Loc),
- New_List (New_Copy (Expression (D_Stat))));
+ D_Conv :=
+ Make_Function_Call (Loc,
+ Name => New_Reference_To (RTE (RO_RT_To_Duration), Loc),
+ Parameter_Associations =>
+ New_List (New_Copy (Expression (D_Stat))));
end if;
D := Make_Temporary (Loc, 'D');
Append_To (Decls,
Make_Object_Declaration (Loc,
- Defining_Identifier =>
- D,
- Object_Definition =>
- New_Reference_To (Standard_Duration, Loc)));
+ Defining_Identifier => D,
+ Object_Definition => New_Reference_To (Standard_Duration, Loc)));
M := Make_Temporary (Loc, 'M');
Append_To (Decls,
Make_Object_Declaration (Loc,
- Defining_Identifier =>
- M,
- Object_Definition =>
- New_Reference_To (Standard_Integer, Loc),
- Expression =>
- D_Disc));
+ Defining_Identifier => M,
+ Object_Definition => New_Reference_To (Standard_Integer, Loc),
+ Expression => D_Disc));
-- Do the assignment at this stage only because the evaluation of the
-- expression must not occur before (see ACVC C97302A).
Append_To (Stmts,
Make_Assignment_Statement (Loc,
- Name =>
- New_Reference_To (D, Loc),
- Expression =>
- D_Conv));
+ Name => New_Reference_To (D, Loc),
+ Expression => D_Conv));
-- Parameter block processing
K := Build_K (Loc, Decls, Obj);
Blk_Typ := Build_Parameter_Block (Loc, Actuals, Formals, Decls);
- P := Parameter_Block_Pack
- (Loc, Blk_Typ, Actuals, Formals, Decls, Stmts);
+ P :=
+ Parameter_Block_Pack (Loc, Blk_Typ, Actuals, Formals, Decls, Stmts);
-- Dispatch table slot processing, generate:
-- S : Integer;
Append_To (Params, New_Copy_Tree (Obj));
Append_To (Params, New_Reference_To (S, Loc));
- Append_To (Params, Make_Attribute_Reference (Loc,
- Prefix => New_Reference_To (P, Loc),
- Attribute_Name => Name_Address));
+ Append_To (Params,
+ Make_Attribute_Reference (Loc,
+ Prefix => New_Reference_To (P, Loc),
+ Attribute_Name => Name_Address));
Append_To (Params, New_Reference_To (D, Loc));
Append_To (Params, New_Reference_To (M, Loc));
Append_To (Params, New_Reference_To (C, Loc));
Append_To (Conc_Typ_Stmts,
Make_Procedure_Call_Statement (Loc,
Name =>
- New_Reference_To (
- Find_Prim_Op (Etype (Etype (Obj)),
- Name_uDisp_Timed_Select),
- Loc),
- Parameter_Associations =>
- Params));
+ New_Reference_To
+ (Find_Prim_Op
+ (Etype (Etype (Obj)), Name_uDisp_Timed_Select), Loc),
+ Parameter_Associations => Params));
-- Generate:
-- if C = POK_Protected_Entry
Append_To (Conc_Typ_Stmts,
Make_If_Statement (Loc,
- Condition =>
+ Condition =>
Make_Or_Else (Loc,
- Left_Opnd =>
+ Left_Opnd =>
Make_Op_Eq (Loc,
- Left_Opnd =>
- New_Reference_To (C, Loc),
+ Left_Opnd => New_Reference_To (C, Loc),
Right_Opnd =>
- New_Reference_To (RTE (
- RE_POK_Protected_Entry), Loc)),
+ New_Reference_To
+ (RTE (RE_POK_Protected_Entry), Loc)),
+
Right_Opnd =>
Make_Op_Eq (Loc,
- Left_Opnd =>
- New_Reference_To (C, Loc),
+ Left_Opnd => New_Reference_To (C, Loc),
Right_Opnd =>
New_Reference_To (RTE (RE_POK_Task_Entry), Loc))),
- Then_Statements =>
- Unpack));
+ Then_Statements => Unpack));
end if;
-- Generate:
Make_Or_Else (Loc,
Left_Opnd =>
Make_Op_Eq (Loc,
- Left_Opnd =>
- New_Reference_To (C, Loc),
+ Left_Opnd => New_Reference_To (C, Loc),
Right_Opnd =>
New_Reference_To (RTE (RE_POK_Procedure), Loc)),
+
Right_Opnd =>
Make_Or_Else (Loc,
Left_Opnd =>
Make_Op_Eq (Loc,
- Left_Opnd =>
- New_Reference_To (C, Loc),
+ Left_Opnd => New_Reference_To (C, Loc),
Right_Opnd =>
New_Reference_To (RTE (
RE_POK_Protected_Procedure), Loc)),
Right_Opnd =>
Make_Op_Eq (Loc,
- Left_Opnd =>
- New_Reference_To (C, Loc),
+ Left_Opnd => New_Reference_To (C, Loc),
Right_Opnd =>
- New_Reference_To (RTE (
- RE_POK_Task_Procedure), Loc)))),
+ New_Reference_To
+ (RTE (RE_POK_Task_Procedure), Loc)))),
- Then_Statements =>
- New_List (E_Call)));
+ Then_Statements => New_List (E_Call)));
Append_To (Conc_Typ_Stmts,
Make_If_Statement (Loc,
- Condition => New_Reference_To (B, Loc),
+ Condition => New_Reference_To (B, Loc),
Then_Statements => N_Stats,
Else_Statements => D_Stats));
Append_To (Stmts,
Make_If_Statement (Loc,
- Condition =>
+ Condition =>
Make_Op_Eq (Loc,
- Left_Opnd =>
- New_Reference_To (K, Loc),
+ Left_Opnd => New_Reference_To (K, Loc),
Right_Opnd =>
New_Reference_To (RTE (RE_TK_Limited_Tagged), Loc)),
-
- Then_Statements =>
- Lim_Typ_Stmts,
-
- Else_Statements =>
- Conc_Typ_Stmts));
+ Then_Statements => Lim_Typ_Stmts,
+ Else_Statements => Conc_Typ_Stmts));
else
-- Skip assignments to temporaries created for in-out parameters.
Insert_Before (Stmt,
Make_Assignment_Statement (Loc,
- Name => New_Reference_To (D, Loc),
+ Name => New_Reference_To (D, Loc),
Expression => D_Conv));
Call := Stmt;
Rewrite (Call,
Make_Procedure_Call_Statement (Loc,
- Name => New_Reference_To (
- RTE (RE_Timed_Protected_Single_Entry_Call), Loc),
+ Name =>
+ New_Reference_To
+ (RTE (RE_Timed_Protected_Single_Entry_Call), Loc),
Parameter_Associations => Params));
when others =>
Append_To (Stmts,
Make_Implicit_If_Statement (N,
- Condition => New_Reference_To (B, Loc),
+ Condition => New_Reference_To (B, Loc),
Then_Statements => E_Stats,
Else_Statements => D_Stats));
end if;
Rewrite (N,
Make_Block_Statement (Loc,
- Declarations => Decls,
+ Declarations => Decls,
Handled_Statement_Sequence =>
Make_Handled_Sequence_Of_Statements (Loc, Stmts)));
Error_Msg_CRT ("protected body", N);
return;
- elsif Expander_Active then
+ elsif Full_Expander_Active then
-- Associate discriminals with the first subprogram or entry body to
-- be expanded.
Make_Integer_Literal (Loc, 0)));
end Family_Size;
+ ----------------------------
+ -- Find_Enclosing_Context --
+ ----------------------------
+
+ procedure Find_Enclosing_Context
+ (N : Node_Id;
+ Context : out Node_Id;
+ Context_Id : out Entity_Id;
+ Context_Decls : out List_Id)
+ is
+ begin
+ -- Traverse the parent chain looking for an enclosing body, block,
+ -- package or return statement.
+
+ Context := Parent (N);
+ while not Nkind_In (Context, N_Block_Statement,
+ N_Entry_Body,
+ N_Extended_Return_Statement,
+ N_Package_Body,
+ N_Package_Declaration,
+ N_Subprogram_Body,
+ N_Task_Body)
+ loop
+ Context := Parent (Context);
+ end loop;
+
+ -- Extract the constituents of the context
+
+ if Nkind (Context) = N_Extended_Return_Statement then
+ Context_Decls := Return_Object_Declarations (Context);
+ Context_Id := Return_Statement_Entity (Context);
+
+ -- Package declarations and bodies use a common library-level activation
+ -- chain or task master, therefore return the package declaration as the
+ -- proper carrier for the appropriate flag.
+
+ elsif Nkind (Context) = N_Package_Body then
+ Context_Decls := Declarations (Context);
+ Context_Id := Corresponding_Spec (Context);
+ Context := Parent (Context_Id);
+
+ if Nkind (Context) = N_Defining_Program_Unit_Name then
+ Context := Parent (Parent (Context));
+ else
+ Context := Parent (Context);
+ end if;
+
+ elsif Nkind (Context) = N_Package_Declaration then
+ Context_Decls := Visible_Declarations (Specification (Context));
+ Context_Id := Defining_Unit_Name (Specification (Context));
+
+ if Nkind (Context_Id) = N_Defining_Program_Unit_Name then
+ Context_Id := Defining_Identifier (Context_Id);
+ end if;
+
+ else
+ Context_Decls := Declarations (Context);
+
+ if Nkind (Context) = N_Block_Statement then
+ Context_Id := Entity (Identifier (Context));
+
+ elsif Nkind (Context) = N_Entry_Body then
+ Context_Id := Defining_Identifier (Context);
+
+ elsif Nkind (Context) = N_Subprogram_Body then
+ if Present (Corresponding_Spec (Context)) then
+ Context_Id := Corresponding_Spec (Context);
+ else
+ Context_Id := Defining_Unit_Name (Specification (Context));
+
+ if Nkind (Context_Id) = N_Defining_Program_Unit_Name then
+ Context_Id := Defining_Identifier (Context_Id);
+ end if;
+ end if;
+
+ elsif Nkind (Context) = N_Task_Body then
+ Context_Id := Corresponding_Spec (Context);
+
+ else
+ raise Program_Error;
+ end if;
+ end if;
+
+ pragma Assert (Present (Context));
+ pragma Assert (Present (Context_Id));
+ pragma Assert (Present (Context_Decls));
+ end Find_Enclosing_Context;
+
-----------------------
-- Find_Master_Scope --
-----------------------
S : Entity_Id;
begin
- -- In Ada2005, the master is the innermost enclosing scope that is not
+ -- In Ada 2005, the master is the innermost enclosing scope that is not
-- transient. If the enclosing block is the rewriting of a call or the
-- scope is an extended return statement this is valid master. The
-- master in an extended return is only used within the return, and is
if Has_Attach_Handler (Conc_Typ)
and then not Restricted_Profile
+ and then not Restriction_Active (No_Dynamic_Attachment)
then
Prot_Typ := RE_Static_Interrupt_Protection;
- elsif Has_Interrupt_Handler (Conc_Typ) then
+ elsif Has_Interrupt_Handler (Conc_Typ)
+ and then not Restriction_Active (No_Dynamic_Attachment)
+ then
Prot_Typ := RE_Dynamic_Interrupt_Protection;
-- The type has explicit entries or generated primitive entry
-- When no priority is specified but an xx_Handler pragma is, we default
-- to System.Interrupts.Default_Interrupt_Priority, see D.3(10).
- elsif Has_Interrupt_Handler (Ptyp)
- or else Has_Attach_Handler (Ptyp)
+ elsif Has_Attach_Handler (Ptyp)
+ or else Has_Interrupt_Handler (Ptyp)
then
Append_To (Args,
New_Reference_To (RTE (RE_Default_Interrupt_Priority), Loc));
-- context of dispatching select statements.
if Has_Entry
- or else Has_Interrupt_Handler (Ptyp)
- or else Has_Attach_Handler (Ptyp)
or else Has_Interfaces (Protect_Rec)
+ or else
+ ((Has_Attach_Handler (Ptyp) or else Has_Interrupt_Handler (Ptyp))
+ and then not Restriction_Active (No_Dynamic_Attachment))
then
declare
- Pkg_Id : constant RTU_Id :=
- Corresponding_Runtime_Package (Ptyp);
+ Pkg_Id : constant RTU_Id := Corresponding_Runtime_Package (Ptyp);
+
Called_Subp : RE_Id;
begin
Append_To (Args,
Make_Attribute_Reference (Loc,
- Prefix =>
- New_Reference_To (P_Arr, Loc),
+ Prefix => New_Reference_To (P_Arr, Loc),
Attribute_Name => Name_Unrestricted_Access));
-- Build_Entry_Names generation flag. When set to true, the
New_Reference_To (RTE (RE_Time_Span_Zero), Loc));
end if;
+ -- Dispatching_Domain parameter. If no Dispatching_Domain pragma or
+ -- aspect is present, then the dispatching domain is null. If a
+ -- pragma or aspect is present, then the dispatching domain is taken
+ -- from the _Dispatching_Domain field of the task value record,
+ -- which was set from the pragma value. Note that this parameter
+ -- must not be generated for the restricted profiles since Ravenscar
+ -- does not allow dispatching domains.
+
+ -- Case where pragma or aspect Dispatching_Domain applies: use given
+ -- value.
+
+ if Present (Tdef) and then Has_Pragma_Dispatching_Domain (Tdef) then
+ Append_To (Args,
+ Make_Selected_Component (Loc,
+ Prefix =>
+ Make_Identifier (Loc, Name_uInit),
+ Selector_Name =>
+ Make_Identifier (Loc, Name_uDispatching_Domain)));
+
+ -- No pragma or aspect Dispatching_Domain apply to the task
+
+ else
+ Append_To (Args, Make_Null (Loc));
+ end if;
+
-- Number of entries. This is an expression of the form:
-- n + _Init.a'Length + _Init.a'B'Length + ...
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