diff options
Diffstat (limited to 'gcc/ada/restrict.ads')
| -rw-r--r-- | gcc/ada/restrict.ads | 88 |
1 files changed, 51 insertions, 37 deletions
diff --git a/gcc/ada/restrict.ads b/gcc/ada/restrict.ads index 6cbdb17790d..0c1f7b8eae4 100644 --- a/gcc/ada/restrict.ads +++ b/gcc/ada/restrict.ads @@ -6,7 +6,7 @@ -- -- -- S p e c -- -- -- --- Copyright (C) 1992-2002 Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2003 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- -- @@ -36,8 +36,8 @@ package Restrict is -- The type Restriction_Id defines the set of restriction identifiers, -- which take no parameter (i.e. they are either present or not present). -- The actual definition is in the separate package Rident, so that - -- it can easily be accessed by the binder without dragging in lots of - -- stuff. + -- it can easily be accessed by the binder without dragging in lots + -- of stuff. subtype All_Restrictions is Restriction_Id range @@ -59,9 +59,8 @@ package Restrict is type Restriction_Parameter_Id is new Rident.Restriction_Parameter_Id; -- The type Restriction_Parameter_Id records cases where a parameter is - -- present in the corresponding pragma. These cases are not checked for - -- consistency by the binder. The actual definition is in the separate - -- package Rident for consistency. + -- present in the corresponding pragma. The actual definition is in the + -- separate package Rident for consistency. type Restrictions_Flags is array (Restriction_Id) of Boolean; -- Type used for arrays indexed by Restriction_Id. @@ -78,9 +77,13 @@ package Restrict is -- legitimate direct use of this array is when the code is modified -- as a result of the restriction in some way. - Restrictions_Loc : array (Restriction_Id) of Source_Ptr; + Restrictions_Loc : array (Restriction_Id) of Source_Ptr := + (others => No_Location); -- Locations of Restrictions pragmas for error message purposes. - -- Valid only if corresponding entry in Restrictions is set. + -- Valid only if corresponding entry in Restrictions is set. A value + -- of No_Location is used for implicit restrictions set by another + -- pragma, and a value of System_Location is used for restrictions + -- set from package Standard by the processing in Targparm. Main_Restrictions : Restrictions_Flags := (others => False); -- This variable saves the cumulative restrictions in effect compiling @@ -95,6 +98,11 @@ package Restrict is -- Corresponding entry is False if the restriction has not been -- violated in the current main unit, and True if it has been violated. + Restriction_Warnings : Restrictions_Flags := (others => False); + -- If one of these flags is set, then it means that violation of the + -- corresponding restriction results only in a warning message, not + -- in an error message, and the restriction is not otherwise enforced. + Restriction_Parameters : array (Restriction_Parameter_Id) of Uint := (others => No_Uint); -- This array indicates the setting of restriction parameter identifier @@ -123,6 +131,7 @@ package Restrict is (No_Delay, "a-calend"), (No_Delay, "calendar"), (No_Dynamic_Priorities, "a-dynpri"), + (No_Finalization, "a-finali"), (No_IO, "a-direio"), (No_IO, "directio"), (No_IO, "a-sequio"), @@ -157,6 +166,7 @@ package Restrict is No_Entry_Calls_In_Elaboration_Code => True, No_Entry_Queue => True, No_Exception_Handlers => True, + No_Exception_Registration => True, No_Implicit_Conditionals => True, No_Implicit_Dynamic_Code => True, No_Implicit_Loops => True, @@ -170,7 +180,6 @@ package Restrict is No_Streams => True, No_Task_Attributes => True, No_Task_Termination => True, - No_Tasking => True, No_Wide_Characters => True, Static_Priorities => True, Static_Storage_Size => True, @@ -183,6 +192,12 @@ package Restrict is -- Subprograms -- ----------------- + function Abort_Allowed return Boolean; + pragma Inline (Abort_Allowed); + -- Tests to see if abort is allowed by the current restrictions settings. + -- For abort to be allowed, either No_Abort_Statements must be False, + -- or Max_Asynchronous_Select_Nesting must be non-zero. + procedure Check_Restricted_Unit (U : Unit_Name_Type; N : Node_Id); -- Checks if loading of unit U is prohibited by the setting of some -- restriction (e.g. No_IO restricts the loading of unit Ada.Text_IO). @@ -198,19 +213,23 @@ package Restrict is procedure Check_Restriction (R : Restriction_Parameter_Id; - N : Node_Id); - -- Checks that the given restriction parameter identifier is not set to - -- zero. If it is set to zero, then the node N is replaced by a node - -- that raises Storage_Error, and a warning is issued. - - procedure Check_Restriction - (R : Restriction_Parameter_Id; V : Uint; N : Node_Id); -- Checks that the count in V does not exceed the maximum value of the -- restriction parameter value corresponding to the given restriction -- parameter identifier (if it has been set). If the count in V exceeds - -- the maximum, then post an error message on node N. + -- the maximum, then post an error message on node N. We use this call + -- when we can tell the maximum usage at compile time. In other words, + -- we guarantee that if a call is made to this routine, then the front + -- end will make all necessary calls for the restriction parameter R + -- to ensure that we really know the maximum value used anywhere. + + procedure Check_Restriction (R : Restriction_Parameter_Id; N : Node_Id); + -- Check that the maximum value of the restriction parameter corresponding + -- to the given restriction parameter identifier is not set to zero. If + -- it has been set to zero, post an error message on node N. We use this + -- call in cases where we can tell at compile time that the count must be + -- at least one, but we can't tell anything more. procedure Check_Elaboration_Code_Allowed (N : Node_Id); -- Tests to see if elaboration code is allowed by the current restrictions @@ -218,10 +237,9 @@ package Restrict is -- an elaboration routine. If elaboration code is not allowed, an error -- message is posted on the node given as argument. - function No_Exception_Handlers_Set return Boolean; - -- Test to see if current restrictions settings specify that no exception - -- handlers are present. This function is called by Gigi when it needs to - -- expand an AT END clean up identifier with no exception handler. + procedure Check_No_Implicit_Heap_Alloc (N : Node_Id); + -- Equivalent to Check_Restriction (No_Implicit_Heap_Allocations, N). + -- Provided for easy use by back end, which has to check this restriction. function Compilation_Unit_Restrictions_Save return Save_Compilation_Unit_Restrictions; @@ -239,13 +257,6 @@ package Restrict is -- This is the corresponding restore procedure to restore restrictions -- previously saved by Compilation_Unit_Restrictions_Save. - procedure Disallow_In_No_Run_Time_Mode (Enode : Node_Id); - -- If in No_Run_Time mode, then the construct represented by Enode is - -- not permitted, and will be appropriately flagged. - - procedure Set_No_Run_Time_Mode; - -- Set the no run time mode, and associated restriction pragmas. - function Get_Restriction_Id (N : Name_Id) return Restriction_Id; @@ -261,21 +272,24 @@ package Restrict is -- Restriction_Parameter_Id value, otherwise returns -- Not_A_Restriction_Parameter_Id. - function Abort_Allowed return Boolean; - pragma Inline (Abort_Allowed); - -- Tests to see if abort is allowed by the current restrictions settings. - -- For abort to be allowed, either No_Abort_Statements must be False, - -- or Max_Asynchronous_Select_Nesting must be non-zero. + function No_Exception_Handlers_Set return Boolean; + -- Test to see if current restrictions settings specify that no exception + -- handlers are present. This function is called by Gigi when it needs to + -- expand an AT END clean up identifier with no exception handler. function Restricted_Profile return Boolean; -- Tests to see if tasking operations follow the GNAT restricted run time -- profile. - procedure Set_Ravenscar; - -- Sets the set of rerstrictions fro Ravenscar + procedure Set_Ravenscar (N : Node_Id); + -- Enables the set of restrictions for Ravenscar. N is the corresponding + -- pragma node, which is used for error messages on any constructs that + -- violate the profile. - procedure Set_Restricted_Profile; - -- Sets the set of restrictions for pragma Restricted_Run_Time + procedure Set_Restricted_Profile (N : Node_Id); + -- Enables the set of restrictions for pragma Restricted_Run_Time. N is + -- the corresponding pragma node, which is used for error messages on + -- constructs that violate the profile. function Tasking_Allowed return Boolean; pragma Inline (Tasking_Allowed); |