-- original one, following the renaming chain) is returned. Otherwise the
-- entity is returned unchanged. Should be in Einfo???
+ procedure Preanalyze_TC_Args (Arg_Req, Arg_Ens : Node_Id);
+ -- Preanalyze the boolean expressions in the Requires and Ensures arguments
+ -- of a Test_Case pragma if present (possibly Empty). We treat these as
+ -- spec expressions (i.e. similar to a default expression).
+
procedure rv;
-- This is a dummy function called by the processing for pragma Reviewable.
-- It is there for assisting front end debugging. By placing a Reviewable
-- Preanalyze the boolean expression, we treat this as a spec expression
-- (i.e. similar to a default expression).
- pragma Assert (In_Pre_Post_Expression = False);
- In_Pre_Post_Expression := True;
Preanalyze_Spec_Expression
(Get_Pragma_Arg (Arg1), Standard_Boolean);
- In_Pre_Post_Expression := False;
-- Remove the subprogram from the scope stack now that the pre-analysis
-- of the precondition/postcondition is done.
-- Checks that Arg, whose expression is an entity name, references a
-- first subtype.
+ procedure Check_Identifier (Arg : Node_Id; Id : Name_Id);
+ -- Checks that the given argument has an identifier, and if so, requires
+ -- it to match the given identifier name. If there is no identifier, or
+ -- a non-matching identifier, then an error message is given and
+ -- Pragma_Exit is raised.
+
+ procedure Check_Identifier_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
+ -- Checks that the given argument has an identifier, and if so, requires
+ -- it to match one of the given identifier names. If there is no
+ -- identifier, or a non-matching identifier, then an error message is
+ -- given and Pragma_Exit is raised.
+
procedure Check_In_Main_Program;
-- Common checks for pragmas that appear within a main program
-- (Priority, Main_Storage, Time_Slice, Relative_Deadline, CPU).
procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
-- Checks if the given argument has an identifier, and if so, requires
-- it to match the given identifier name. If there is a non-matching
- -- identifier, then an error message is given and Error_Pragmas raised.
+ -- identifier, then an error message is given and Pragma_Exit is raised.
procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
-- Checks if the given argument has an identifier, and if so, requires
-- it to match the given identifier name. If there is a non-matching
- -- identifier, then an error message is given and Error_Pragmas raised.
+ -- identifier, then an error message is given and Pragma_Exit is raised.
-- In this version of the procedure, the identifier name is given as
-- a string with lower case letters.
-- that the constraint is static as required by the restrictions for
-- Unchecked_Union.
+ procedure Check_Test_Case;
+ -- Called to process a test-case pragma. The treatment is similar to the
+ -- one for pre- and postcondition in Check_Precondition_Postcondition.
+ -- There are three cases:
+ --
+ -- The pragma appears after a subprogram spec
+ --
+ -- The first step is to analyze the pragma, but this is skipped if
+ -- the subprogram spec appears within a package specification
+ -- (because this is the case where we delay analysis till the end of
+ -- the spec). Then (whether or not it was analyzed), the pragma is
+ -- chained to the subprogram in question (using Spec_TC_List and
+ -- Next_Pragma).
+ --
+ -- The pragma appears at the start of subprogram body declarations
+ --
+ -- In this case an immediate return to the caller is made, and the
+ -- pragma is NOT analyzed.
+ --
+ -- In all other cases, an error message for bad placement is given
+
procedure Check_Valid_Configuration_Pragma;
-- Legality checks for placement of a configuration pragma
Error_Pragma_Arg ("invalid argument for pragma%", Argx);
end if;
end Check_Arg_Is_One_Of;
+
---------------------------------
-- Check_Arg_Is_Queuing_Policy --
---------------------------------
end if;
end Check_First_Subtype;
+ ----------------------
+ -- Check_Identifier --
+ ----------------------
+
+ procedure Check_Identifier (Arg : Node_Id; Id : Name_Id) is
+ begin
+ if Present (Arg)
+ and then Nkind (Arg) = N_Pragma_Argument_Association
+ then
+ if Chars (Arg) = No_Name or else Chars (Arg) /= Id then
+ Error_Msg_Name_1 := Pname;
+ Error_Msg_Name_2 := Id;
+ Error_Msg_N ("pragma% argument expects identifier%", Arg);
+ raise Pragma_Exit;
+ end if;
+ end if;
+ end Check_Identifier;
+
+ --------------------------------
+ -- Check_Identifier_Is_One_Of --
+ --------------------------------
+
+ procedure Check_Identifier_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
+ begin
+ if Present (Arg)
+ and then Nkind (Arg) = N_Pragma_Argument_Association
+ then
+ if Chars (Arg) = No_Name then
+ Error_Msg_Name_1 := Pname;
+ Error_Msg_N ("pragma% argument expects an identifier", Arg);
+ raise Pragma_Exit;
+
+ elsif Chars (Arg) /= N1
+ and then Chars (Arg) /= N2
+ then
+ Error_Msg_Name_1 := Pname;
+ Error_Msg_N ("invalid identifier for pragma% argument", Arg);
+ raise Pragma_Exit;
+ end if;
+ end if;
+ end Check_Identifier_Is_One_Of;
+
---------------------------
-- Check_In_Main_Program --
---------------------------
PO : Node_Id;
procedure Chain_PPC (PO : Node_Id);
- -- If PO is a subprogram declaration node (or a generic subprogram
- -- declaration node), then the precondition/postcondition applies
- -- to this subprogram and the processing for the pragma is completed.
- -- Otherwise the pragma is misplaced.
+ -- If PO is an entry or a [generic] subprogram declaration node, then
+ -- the precondition/postcondition applies to this subprogram and the
+ -- processing for the pragma is completed. Otherwise the pragma is
+ -- misplaced.
---------------
-- Chain_PPC --
if Pragma_Name (N) = Name_Precondition then
if not From_Aspect_Specification (N) then
- P := Spec_PPC_List (S);
+ P := Spec_PPC_List (Contract (S));
while Present (P) loop
if Pragma_Name (P) = Name_Precondition
and then From_Aspect_Specification (P)
begin
for J in Inherited'Range loop
- P := Spec_PPC_List (Inherited (J));
+ P := Spec_PPC_List (Contract (Inherited (J)));
while Present (P) loop
if Pragma_Name (P) = Name_Precondition
and then Class_Present (P)
-- Chain spec PPC pragma to list for subprogram
- Set_Next_Pragma (N, Spec_PPC_List (S));
- Set_Spec_PPC_List (S, N);
+ Set_Next_Pragma (N, Spec_PPC_List (Contract (S)));
+ Set_Spec_PPC_List (Contract (S), N);
-- Return indicating spec case
(Get_Pragma_Arg (Arg2), Standard_String);
end if;
- -- Record if pragma is enabled
+ -- Record if pragma is disabled
if Check_Enabled (Pname) then
Set_SCO_Pragma_Enabled (Loc);
end case;
end Check_Static_Constraint;
+ ---------------------
+ -- Check_Test_Case --
+ ---------------------
+
+ procedure Check_Test_Case is
+ P : Node_Id;
+ PO : Node_Id;
+
+ procedure Chain_TC (PO : Node_Id);
+ -- If PO is an entry or a [generic] subprogram declaration node, then
+ -- the test-case applies to this subprogram and the processing for
+ -- the pragma is completed. Otherwise the pragma is misplaced.
+
+ --------------
+ -- Chain_TC --
+ --------------
+
+ procedure Chain_TC (PO : Node_Id) is
+ S : Entity_Id;
+
+ begin
+ if Nkind (PO) = N_Abstract_Subprogram_Declaration then
+ if From_Aspect_Specification (N) then
+ Error_Pragma
+ ("aspect% cannot be applied to abstract subprogram");
+ else
+ Error_Pragma
+ ("pragma% cannot be applied to abstract subprogram");
+ end if;
+
+ elsif not Nkind_In (PO, N_Subprogram_Declaration,
+ N_Generic_Subprogram_Declaration,
+ N_Entry_Declaration)
+ then
+ Pragma_Misplaced;
+ end if;
+
+ -- Here if we have [generic] subprogram or entry declaration
+
+ if Nkind (PO) = N_Entry_Declaration then
+ S := Defining_Entity (PO);
+ else
+ S := Defining_Unit_Name (Specification (PO));
+ end if;
+
+ -- Note: we do not analyze the pragma at this point. Instead we
+ -- delay this analysis until the end of the declarative part in
+ -- which the pragma appears. This implements the required delay
+ -- in this analysis, allowing forward references. The analysis
+ -- happens at the end of Analyze_Declarations.
+
+ -- There should not be another test case with the same name
+ -- associated to this subprogram.
+
+ declare
+ Name : constant String_Id := Get_Name_From_Test_Case_Pragma (N);
+ TC : Node_Id;
+
+ begin
+ TC := Spec_TC_List (Contract (S));
+ while Present (TC) loop
+
+ if String_Equal
+ (Name, Get_Name_From_Test_Case_Pragma (TC))
+ then
+ Error_Msg_Sloc := Sloc (TC);
+
+ if From_Aspect_Specification (N) then
+ Error_Pragma ("name for aspect% is already used#");
+ else
+ Error_Pragma ("name for pragma% is already used#");
+ end if;
+ end if;
+
+ TC := Next_Pragma (TC);
+ end loop;
+ end;
+
+ -- Chain spec TC pragma to list for subprogram
+
+ Set_Next_Pragma (N, Spec_TC_List (Contract (S)));
+ Set_Spec_TC_List (Contract (S), N);
+ end Chain_TC;
+
+ -- Start of processing for Check_Test_Case
+
+ begin
+ if not Is_List_Member (N) then
+ Pragma_Misplaced;
+ end if;
+
+ -- Search prior declarations
+
+ P := N;
+ while Present (Prev (P)) loop
+ P := Prev (P);
+
+ -- If the previous node is a generic subprogram, do not go to to
+ -- the original node, which is the unanalyzed tree: we need to
+ -- attach the test-case to the analyzed version at this point.
+ -- They get propagated to the original tree when analyzing the
+ -- corresponding body.
+
+ if Nkind (P) not in N_Generic_Declaration then
+ PO := Original_Node (P);
+ else
+ PO := P;
+ end if;
+
+ -- Skip past prior pragma
+
+ if Nkind (PO) = N_Pragma then
+ null;
+
+ -- Skip stuff not coming from source
+
+ elsif not Comes_From_Source (PO) then
+ null;
+
+ -- Only remaining possibility is subprogram declaration
+
+ else
+ Chain_TC (PO);
+ return;
+ end if;
+ end loop;
+
+ -- If we fall through loop, pragma is at start of list, so see if it
+ -- is in the pragmas after a library level subprogram.
+
+ if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
+ Chain_TC (Unit (Parent (Parent (N))));
+ return;
+ end if;
+
+ -- If we fall through, pragma was misplaced
+
+ Pragma_Misplaced;
+ end Check_Test_Case;
+
--------------------------------------
-- Check_Valid_Configuration_Pragma --
--------------------------------------
-- Start of processing for Process_Restrictions_Or_Restriction_Warnings
begin
- -- Ignore all Restrictions pragma in CodePeer mode
+ -- Ignore all Restrictions pragma in CodePeer and ALFA modes
- if CodePeer_Mode then
+ if CodePeer_Mode or ALFA_Mode then
return;
end if;
-- Start of processing for Process_Suppress_Unsuppress
begin
- -- Ignore pragma Suppress/Unsuppress in codepeer mode on user code:
- -- we want to generate checks for analysis purposes, as set by -gnatC
+ -- Ignore pragma Suppress/Unsuppress in CodePeer and ALFA modes on
+ -- user code: we want to generate checks for analysis purposes, as
+ -- set respectively by -gnatC and -gnatd.F
- if CodePeer_Mode and then Comes_From_Source (N) then
+ if (CodePeer_Mode or ALFA_Mode)
+ and then Comes_From_Source (N)
+ then
return;
end if;
-- external tool and a tool-specific function. These arguments are
-- not analyzed.
- -- The following is a special form used in conjunction with the
- -- ALFA subset of Ada:
-
- -- pragma Annotate (Formal_Proof, MODE);
- -- MODE ::= On | Off
-
- -- This pragma either forces (mode On) or disables (mode Off)
- -- formal verification of the subprogram in which it is added. When
- -- formal verification is forced, all violations of the the ALFA
- -- subset of Ada present in the subprogram are reported as errors
- -- to the user.
-
when Pragma_Annotate => Annotate : declare
Arg : Node_Id;
Exp : Node_Id;
Check_No_Identifiers;
Store_Note (N);
- -- Special processing for Formal_Proof case
-
- if Chars (Get_Pragma_Arg (Arg1)) = Name_Formal_Proof then
- if No (Arg2) then
- Error_Pragma_Arg
- ("missing second argument for pragma%", Arg1);
- end if;
-
- Check_Arg_Count (2);
- Check_Arg_Is_One_Of (Arg2, Name_On, Name_Off);
-
- declare
- Cur_Subp : constant Entity_Id := Current_Subprogram;
-
- begin
- if Present (Cur_Subp)
- and then (Is_Subprogram (Cur_Subp)
- or else Is_Generic_Subprogram (Cur_Subp))
- then
- -- Notify user if some ALFA violation occurred before
- -- this point in Cur_Subp. These violations are not
- -- precisly located, but this is better than ignoring
- -- these violations.
-
- if Chars (Get_Pragma_Arg (Arg2)) = Name_On
- and then (not Is_In_ALFA (Cur_Subp)
- or else not Body_Is_In_ALFA (Cur_Subp))
- then
- Error_Pragma
- ("pragma% is placed after violation"
- & " of ALFA");
- end if;
-
- -- We treat this as a Rep_Item to record it on the rep
- -- item chain for easy location later on.
-
- Record_Rep_Item (Cur_Subp, N);
-
- else
- Error_Pragma ("wrong placement for pragma%");
- end if;
- end;
-
-- Second parameter is optional, it is never analyzed
- elsif No (Arg2) then
+ if No (Arg2) then
null;
-- Here if we have a second parameter
-- Check --
-----------
- -- pragma Check ([Name =>] Identifier,
- -- [Check =>] Boolean_Expression
- -- [,[Message =>] String_Expression]);
+ -- pragma Check ([Name =>] IDENTIFIER,
+ -- [Check =>] Boolean_EXPRESSION
+ -- [,[Message =>] String_EXPRESSION]);
when Pragma_Check => Check : declare
Expr : Node_Id;
-- cause insertion of actions that would escape the attempt to
-- suppress the check code.
- -- Note that the Sloc for the IF statement corresponds to the
+ -- Note that the Sloc for the if statement corresponds to the
-- argument condition, not the pragma itself. The reason for this
-- is that we may generate a warning if the condition is False at
-- compile time, and we do not want to delete this warning when we
- -- delete the IF statement.
+ -- delete the if statement.
Expr := Get_Pragma_Arg (Arg2);
(Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
Loc);
+ if Debug_Pragmas_Enabled then
+ Set_SCO_Pragma_Enabled (Loc);
+ end if;
+
if Arg_Count = 2 then
Cond :=
Make_And_Then (Loc,
Check_Valid_Configuration_Pragma;
Check_Restriction (No_Initialize_Scalars, N);
- -- Initialize_Scalars creates false positives in CodePeer,
- -- so ignore this pragma in this mode.
+ -- Initialize_Scalars creates false positives in CodePeer, and
+ -- incorrect negative results in ALFA mode, so ignore this pragma
+ -- in these modes.
if not Restriction_Active (No_Initialize_Scalars)
- and then not CodePeer_Mode
+ and then not (CodePeer_Mode or ALFA_Mode)
then
Init_Or_Norm_Scalars := True;
Initialize_Scalars := True;
when Pragma_Inline_Always =>
GNAT_Pragma;
- -- Pragma always active unless in CodePeer mode, since this causes
- -- walk order issues.
+ -- Pragma always active unless in CodePeer or ALFA mode, since
+ -- this causes walk order issues.
- if not CodePeer_Mode then
+ if not (CodePeer_Mode or ALFA_Mode) then
Process_Inline (True);
end if;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
- -- Normalize_Scalars creates false positives in CodePeer, so
- -- ignore this pragma in this mode.
+ -- Normalize_Scalars creates false positives in CodePeer, and
+ -- incorrect negative results in ALFA mode, so ignore this pragma
+ -- in these modes.
- if not CodePeer_Mode then
+ if not (CodePeer_Mode or ALFA_Mode) then
Normalize_Scalars := True;
Init_Or_Norm_Scalars := True;
end if;
-- In the context of static code analysis, we do not need
-- complex front-end expansions related to pragma Pack,
- -- so disable handling of pragma Pack in this case.
+ -- so disable handling of pragma Pack in these cases.
- if CodePeer_Mode then
+ if CodePeer_Mode or ALFA_Mode then
null;
-- Don't attempt any packing for VM targets. We possibly
-- Postcondition --
-------------------
- -- pragma Postcondition ([Check =>] Boolean_Expression
- -- [,[Message =>] String_Expression]);
+ -- pragma Postcondition ([Check =>] Boolean_EXPRESSION
+ -- [,[Message =>] String_EXPRESSION]);
when Pragma_Postcondition => Postcondition : declare
In_Body : Boolean;
-- Precondition --
------------------
- -- pragma Precondition ([Check =>] Boolean_Expression
- -- [,[Message =>] String_Expression]);
+ -- pragma Precondition ([Check =>] Boolean_EXPRESSION
+ -- [,[Message =>] String_EXPRESSION]);
when Pragma_Precondition => Precondition : declare
In_Body : Boolean;
end if;
end;
- --------------
+ ---------------
-- Task_Info --
- --------------
+ ---------------
-- pragma Task_Info (EXPRESSION);
end if;
end Task_Storage;
+ ---------------
+ -- Test_Case --
+ ---------------
+
+ -- pragma Test_Case ([Name =>] Static_String_EXPRESSION
+ -- ,[Mode =>] MODE_TYPE
+ -- [, Requires => Boolean_EXPRESSION]
+ -- [, Ensures => Boolean_EXPRESSION]);
+
+ -- MODE_TYPE ::= Normal | Robustness
+
+ when Pragma_Test_Case => Test_Case : declare
+ begin
+ GNAT_Pragma;
+ Check_At_Least_N_Arguments (3);
+ Check_At_Most_N_Arguments (4);
+ Check_Arg_Order
+ ((Name_Name, Name_Mode, Name_Requires, Name_Ensures));
+
+ Check_Optional_Identifier (Arg1, Name_Name);
+ Check_Arg_Is_Static_Expression (Arg1, Standard_String);
+ Check_Optional_Identifier (Arg2, Name_Mode);
+ Check_Arg_Is_One_Of (Arg2, Name_Normal, Name_Robustness);
+
+ if Arg_Count = 4 then
+ Check_Identifier (Arg3, Name_Requires);
+ Check_Identifier (Arg4, Name_Ensures);
+ else
+ Check_Identifier_Is_One_Of (Arg3, Name_Requires, Name_Ensures);
+ end if;
+
+ Check_Test_Case;
+ end Test_Case;
+
--------------------------
-- Thread_Local_Storage --
--------------------------
when Pragma_Exit => null;
end Analyze_Pragma;
+ -----------------------------
+ -- Analyze_TC_In_Decl_Part --
+ -----------------------------
+
+ procedure Analyze_TC_In_Decl_Part (N : Node_Id; S : Entity_Id) is
+ begin
+ -- Install formals and push subprogram spec onto scope stack so that we
+ -- can see the formals from the pragma.
+
+ Install_Formals (S);
+ Push_Scope (S);
+
+ -- Preanalyze the boolean expressions, we treat these as spec
+ -- expressions (i.e. similar to a default expression).
+
+ Preanalyze_TC_Args (Get_Requires_From_Test_Case_Pragma (N),
+ Get_Ensures_From_Test_Case_Pragma (N));
+
+ -- Remove the subprogram from the scope stack now that the pre-analysis
+ -- of the expressions in the test-case is done.
+
+ End_Scope;
+ end Analyze_TC_In_Decl_Part;
+
-------------------
-- Check_Enabled --
-------------------
Pragma_Task_Info => -1,
Pragma_Task_Name => -1,
Pragma_Task_Storage => 0,
+ Pragma_Test_Case => -1,
Pragma_Thread_Local_Storage => 0,
Pragma_Time_Slice => -1,
Pragma_Title => -1,
end if;
end Is_Pragma_String_Literal;
+ ------------------------
+ -- Preanalyze_TC_Args --
+ ------------------------
+
+ procedure Preanalyze_TC_Args (Arg_Req, Arg_Ens : Node_Id) is
+ begin
+ -- Preanalyze the boolean expressions, we treat these as spec
+ -- expressions (i.e. similar to a default expression).
+
+ if Present (Arg_Req) then
+ Preanalyze_Spec_Expression
+ (Get_Pragma_Arg (Arg_Req), Standard_Boolean);
+ end if;
+
+ if Present (Arg_Ens) then
+ Preanalyze_Spec_Expression
+ (Get_Pragma_Arg (Arg_Ens), Standard_Boolean);
+ end if;
+ end Preanalyze_TC_Args;
+
--------------------------------------
-- Process_Compilation_Unit_Pragmas --
--------------------------------------
OSDN Git Service
