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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S Y S T E M . R I D E N T --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1992-2017, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This package defines the set of restriction identifiers. It is a generic
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33 -- package that is instantiated by the compiler/binder in package Rident, and
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34 -- is instantiated in package System.Restrictions for use at run-time.
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35
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36 -- The reason that we make this a generic package is so that in the case of
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37 -- the instantiation in Rident for use at compile time and bind time, we can
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38 -- generate normal image tables for the enumeration types, which are needed
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39 -- for diagnostic and informational messages. At run-time we really do not
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40 -- want to waste the space for these image tables, and they are not needed,
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41 -- so we can do the instantiation under control of Discard_Names to remove
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42 -- the tables.
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43
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44 ---------------------------------------------------
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45 -- Note On Compile/Run-Time Consistency Checking --
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46 ---------------------------------------------------
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47
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48 -- This unit is with'ed by the run-time (to make System.Restrictions which is
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49 -- used for run-time access to restriction information), by the compiler (to
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50 -- determine what restrictions are implemented and what their category is) and
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51 -- by the binder (in processing ali files, and generating the information used
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52 -- at run-time to access restriction information).
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53
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54 -- Normally the version of System.Rident referenced in all three contexts
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55 -- should be the same. However, problems could arise in certain inconsistent
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56 -- builds that used inconsistent versions of the compiler and run-time. This
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57 -- sort of thing is not strictly correct, but it does arise when short-cuts
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58 -- are taken in build procedures.
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59
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60 -- Previously, this kind of inconsistency could cause a significant problem.
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61 -- If versions of System.Rident accessed by the compiler and binder differed,
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62 -- then the binder could fail to recognize the R (restrictions line) in the
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63 -- ali file, leading to bind errors when restrictions were added or removed.
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64
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65 -- The latest implementation avoids both this problem by using a named
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66 -- scheme for recording restrictions, rather than a positional scheme which
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67 -- fails completely if restrictions are added or subtracted. Now the worst
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68 -- that happens at bind time in inconsistent builds is that unrecognized
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69 -- restrictions are ignored, and the consistency checking for restrictions
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70 -- might be incomplete, which is no big deal.
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71
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72 pragma Compiler_Unit_Warning;
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73
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74 generic
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75 package System.Rident is
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76 pragma Preelaborate;
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77
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78 -- The following enumeration type defines the set of restriction
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79 -- identifiers that are implemented in GNAT.
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80
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81 -- To add a new restriction identifier, add an entry with the name to be
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82 -- used in the pragma, and add calls to the Restrict.Check_Restriction
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83 -- routine as appropriate.
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84
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85 type Restriction_Id is
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86
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87 -- The following cases are checked for consistency in the binder. The
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88 -- binder will check that every unit either has the restriction set, or
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89 -- does not violate the restriction.
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90
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91 (Simple_Barriers, -- Ada 2012 (D.7 (10.9/3))
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92 Pure_Barriers, -- GNAT
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93 No_Abort_Statements, -- (RM D.7(5), H.4(3))
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94 No_Access_Parameter_Allocators, -- Ada 2012 (RM H.4 (8.3/3))
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95 No_Access_Subprograms, -- (RM H.4(17))
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96 No_Allocators, -- (RM H.4(7))
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97 No_Anonymous_Allocators, -- Ada 2012 (RM H.4(8/1))
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98 No_Asynchronous_Control, -- (RM J.13(3/2)
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99 No_Calendar, -- GNAT
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100 No_Coextensions, -- Ada 2012 (RM H.4(8.2/3))
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101 No_Default_Stream_Attributes, -- Ada 2012 (RM 13.12.1(4/2))
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102 No_Delay, -- (RM H.4(21))
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103 No_Direct_Boolean_Operators, -- GNAT
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104 No_Dispatch, -- (RM H.4(19))
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105 No_Dispatching_Calls, -- GNAT
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106 No_Dynamic_Attachment, -- Ada 2012 (RM E.7(10/3))
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107 No_Dynamic_Priorities, -- (RM D.9(9))
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108 No_Enumeration_Maps, -- GNAT
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109 No_Entry_Calls_In_Elaboration_Code, -- GNAT
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110 No_Entry_Queue, -- GNAT (Ravenscar)
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111 No_Exception_Handlers, -- GNAT
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112 No_Exception_Propagation, -- GNAT
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113 No_Exception_Registration, -- GNAT
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114 No_Exceptions, -- (RM H.4(12))
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115 No_Finalization, -- GNAT
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116 No_Fixed_IO, -- GNAT
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117 No_Fixed_Point, -- (RM H.4(15))
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118 No_Floating_Point, -- (RM H.4(14))
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119 No_IO, -- (RM H.4(20))
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120 No_Implicit_Conditionals, -- GNAT
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121 No_Implicit_Dynamic_Code, -- GNAT
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122 No_Implicit_Heap_Allocations, -- (RM D.8(8), H.4(3))
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123 No_Implicit_Task_Allocations, -- GNAT
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124 No_Implicit_Protected_Object_Allocations, -- GNAT
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125 No_Initialize_Scalars, -- GNAT
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126 No_Local_Allocators, -- (RM H.4(8))
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127 No_Local_Timing_Events, -- (RM D.7(10.2/2))
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128 No_Local_Protected_Objects, -- Ada 2012 (D.7(10/1.3))
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129 No_Long_Long_Integers, -- GNAT
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130 No_Multiple_Elaboration, -- GNAT
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131 No_Nested_Finalization, -- (RM D.7(4))
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132 No_Protected_Type_Allocators, -- Ada 2012 (D.7 (10.3/2))
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133 No_Protected_Types, -- (RM H.4(5))
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134 No_Recursion, -- (RM H.4(22))
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135 No_Reentrancy, -- (RM H.4(23))
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136 No_Relative_Delay, -- Ada 2012 (D.7 (10.5/3))
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137 No_Requeue_Statements, -- Ada 2012 (D.7 (10.6/3))
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138 No_Secondary_Stack, -- GNAT
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139 No_Select_Statements, -- Ada 2012 (D.7 (10.7/4))
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140 No_Specific_Termination_Handlers, -- (RM D.7(10.7/2))
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141 No_Standard_Allocators_After_Elaboration, -- Ada 2012 (RM D.7(19.1/2))
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142 No_Standard_Storage_Pools, -- GNAT
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143 No_Stream_Optimizations, -- GNAT
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144 No_Streams, -- GNAT
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145 No_Task_Allocators, -- (RM D.7(7))
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146 No_Task_Attributes_Package, -- GNAT
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147 No_Task_At_Interrupt_Priority, -- GNAT
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148 No_Task_Hierarchy, -- (RM D.7(3), H.4(3))
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149 No_Task_Termination, -- GNAT (Ravenscar)
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150 No_Tasking, -- GNAT
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151 No_Terminate_Alternatives, -- (RM D.7(6))
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152 No_Unchecked_Access, -- (RM H.4(18))
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153 No_Unchecked_Conversion, -- (RM J.13(4/2))
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154 No_Unchecked_Deallocation, -- (RM J.13(5/2))
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155 Static_Priorities, -- GNAT
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156 Static_Storage_Size, -- GNAT
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157
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158 -- The following require consistency checking with special rules. See
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159 -- individual routines in unit Bcheck for details of what is required.
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160
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161 No_Default_Initialization, -- GNAT
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162
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163 -- The following cases do not require consistency checking and if used
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164 -- as a configuration pragma within a specific unit, apply only to that
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165 -- unit (e.g. if used in the package spec, do not apply to the body)
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166
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167 -- Note: No_Elaboration_Code is handled specially. Like the other
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168 -- non-partition-wide restrictions, it can only be set in a unit that
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169 -- is part of the extended main source unit (body/spec/subunits). But
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170 -- it is sticky, in that if it is found anywhere within any of these
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171 -- units, it applies to all units in this extended main source.
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172
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173 Immediate_Reclamation, -- (RM H.4(10))
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174 No_Dynamic_Sized_Objects, -- GNAT
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175 No_Implementation_Aspect_Specifications, -- Ada 2012 AI-241
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176 No_Implementation_Attributes, -- Ada 2005 AI-257
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177 No_Implementation_Identifiers, -- Ada 2012 AI-246
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178 No_Implementation_Pragmas, -- Ada 2005 AI-257
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179 No_Implementation_Restrictions, -- GNAT
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180 No_Implementation_Units, -- Ada 2012 AI-242
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181 No_Implicit_Aliasing, -- GNAT
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182 No_Implicit_Loops, -- GNAT
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183 No_Elaboration_Code, -- GNAT
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184 No_Obsolescent_Features, -- Ada 2005 AI-368
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185 No_Wide_Characters, -- GNAT
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186 SPARK_05, -- GNAT
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187
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188 -- The following cases require a parameter value
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189
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190 No_Specification_Of_Aspect, -- 2012 (RM 13.12.1 (6.1/3))
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191 No_Use_Of_Attribute, -- 2012 (RM 13.12.1 (6.2/3))
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192 No_Use_Of_Pragma, -- 2012 (RM 13.12.1 (6.3/3))
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193
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194 -- The following entries are fully checked at compile/bind time, which
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195 -- means that the compiler can in general tell the minimum value which
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196 -- could be used with a restrictions pragma. The binder can deduce the
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197 -- appropriate minimum value for the partition by taking the maximum
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198 -- value required by any unit.
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199
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200 Max_Protected_Entries, -- (RM D.7(14))
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201 Max_Select_Alternatives, -- (RM D.7(12))
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202 Max_Task_Entries, -- (RM D.7(13), H.4(3))
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203
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204 -- The following entries are also fully checked at compile/bind time,
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205 -- and the compiler can also at least in some cases tell the minimum
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206 -- value which could be used with a restriction pragma. The difference
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207 -- is that the contributions are additive, so the binder deduces this
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208 -- value by adding the unit contributions.
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209
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210 Max_Tasks, -- (RM D.7(19), H.4(3))
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211
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212 -- The following entries are checked at compile time only for zero/
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213 -- nonzero entries. This means that the compiler can tell at compile
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214 -- time if a restriction value of zero is (would be) violated, but that
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215 -- the compiler cannot distinguish between different non-zero values.
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216
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217 Max_Asynchronous_Select_Nesting, -- (RM D.7(18), H.4(3))
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218 Max_Entry_Queue_Length, -- Ada 2012 (RM D.7 (19.1/2))
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219
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220 -- The remaining entries are not checked at compile/bind time
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221
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222 Max_Storage_At_Blocking, -- (RM D.7(17))
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223
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224 Not_A_Restriction_Id);
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225
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226 -- Synonyms permitted for historical purposes of compatibility.
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227 -- Must be coordinated with Restrict.Process_Restriction_Synonym.
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228
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229 Boolean_Entry_Barriers : Restriction_Id renames Simple_Barriers;
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230 Max_Entry_Queue_Depth : Restriction_Id renames Max_Entry_Queue_Length;
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231 No_Dynamic_Interrupts : Restriction_Id renames No_Dynamic_Attachment;
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232 No_Requeue : Restriction_Id renames No_Requeue_Statements;
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233 No_Task_Attributes : Restriction_Id renames No_Task_Attributes_Package;
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234 SPARK : Restriction_Id renames SPARK_05;
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235
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236 subtype All_Restrictions is Restriction_Id range
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237 Simple_Barriers .. Max_Storage_At_Blocking;
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238 -- All restrictions (excluding only Not_A_Restriction_Id)
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239
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240 subtype All_Boolean_Restrictions is Restriction_Id range
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241 Simple_Barriers .. SPARK_05;
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242 -- All restrictions which do not take a parameter
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243
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244 subtype Partition_Boolean_Restrictions is All_Boolean_Restrictions range
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245 Simple_Barriers .. Static_Storage_Size;
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246 -- Boolean restrictions that are checked for partition consistency.
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247 -- Note that all parameter restrictions are checked for partition
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248 -- consistency by default, so this distinction is only needed in the
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249 -- case of Boolean restrictions.
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250
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251 subtype Cunit_Boolean_Restrictions is All_Boolean_Restrictions range
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252 Immediate_Reclamation .. SPARK_05;
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253 -- Boolean restrictions that are not checked for partition consistency
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254 -- and that thus apply only to the current unit. Note that for these
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255 -- restrictions, the compiler does not apply restrictions found in
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256 -- with'ed units, parent specs etc. to the main unit, and vice versa.
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257
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258 subtype All_Parameter_Restrictions is
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259 Restriction_Id range
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260 No_Specification_Of_Aspect .. Max_Storage_At_Blocking;
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261 -- All restrictions that take a parameter
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262
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263 subtype Integer_Parameter_Restrictions is
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264 Restriction_Id range
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265 Max_Protected_Entries .. Max_Storage_At_Blocking;
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266 -- All restrictions taking an integer parameter
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267
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268 subtype Checked_Parameter_Restrictions is
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269 All_Parameter_Restrictions range
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270 Max_Protected_Entries .. Max_Entry_Queue_Length;
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271 -- These are the parameter restrictions that can be at least partially
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272 -- checked at compile/binder time. Minimally, the compiler can detect
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273 -- violations of a restriction pragma with a value of zero reliably.
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274
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275 subtype Checked_Max_Parameter_Restrictions is
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276 Checked_Parameter_Restrictions range
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277 Max_Protected_Entries .. Max_Task_Entries;
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278 -- Restrictions with parameters that can be checked in some cases by
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279 -- maximizing among statically detected instances where the compiler
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280 -- can determine the count.
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281
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282 subtype Checked_Add_Parameter_Restrictions is
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283 Checked_Parameter_Restrictions range
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284 Max_Tasks .. Max_Tasks;
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285 -- Restrictions with parameters that can be checked in some cases by
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286 -- summing the statically detected instances where the compiler can
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287 -- determine the count.
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288
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289 subtype Checked_Val_Parameter_Restrictions is
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290 Checked_Parameter_Restrictions range
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291 Max_Protected_Entries .. Max_Tasks;
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292 -- Restrictions with parameter where the count is known at least in some
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293 -- cases by the compiler/binder.
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294
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295 subtype Checked_Zero_Parameter_Restrictions is
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296 Checked_Parameter_Restrictions range
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297 Max_Asynchronous_Select_Nesting .. Max_Entry_Queue_Length;
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298 -- Restrictions with parameters where the compiler can detect the use of
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299 -- the feature, and hence violations of a restriction specifying a value
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300 -- of zero, but cannot detect specific values other than zero/nonzero.
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301
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302 subtype Unchecked_Parameter_Restrictions is
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303 All_Parameter_Restrictions range
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304 Max_Storage_At_Blocking .. Max_Storage_At_Blocking;
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305 -- Restrictions with parameters where the compiler cannot ever detect
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306 -- corresponding compile time usage, so the binder and compiler never
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307 -- detect violations of any restriction.
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308
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309 -------------------------------------
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310 -- Restriction Status Declarations --
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311 -------------------------------------
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312
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313 -- The following declarations are used to record the current status or
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314 -- restrictions (for the current unit, or related units, at compile time,
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315 -- and for all units in a partition at bind time or run time).
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316
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317 type Restriction_Flags is array (All_Restrictions) of Boolean;
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318 type Restriction_Values is array (All_Parameter_Restrictions) of Natural;
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319 type Parameter_Flags is array (All_Parameter_Restrictions) of Boolean;
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320
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321 type Restrictions_Info is record
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322 Set : Restriction_Flags;
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323 -- An entry is True in the Set array if a restrictions pragma has been
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324 -- encountered for the given restriction. If the value is True for a
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325 -- parameter restriction, then the corresponding entry in the Value
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326 -- array gives the minimum value encountered for any such restriction.
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327
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328 Value : Restriction_Values;
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329 -- If the entry for a parameter restriction in Set is True (i.e. a
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330 -- restrictions pragma for the restriction has been encountered), then
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331 -- the corresponding entry in the Value array is the minimum value
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332 -- specified by any such restrictions pragma. Note that a restrictions
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333 -- pragma specifying a value greater than Int'Last is simply ignored.
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334
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335 Violated : Restriction_Flags;
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336 -- An entry is True in the violations array if the compiler has detected
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337 -- a violation of the restriction. For a parameter restriction, the
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338 -- Count and Unknown arrays have additional information.
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339
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340 Count : Restriction_Values;
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341 -- If an entry for a parameter restriction is True in Violated, the
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342 -- corresponding entry in the Count array may record additional
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343 -- information. If the actual minimum count is known (by taking
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344 -- maximums, or sums, depending on the restriction), it will be
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345 -- recorded in this array. If not, then the value will remain zero.
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346 -- The value is also zero for a non-violated restriction.
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347
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348 Unknown : Parameter_Flags;
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349 -- If an entry for a parameter restriction is True in Violated, the
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350 -- corresponding entry in the Unknown array may record additional
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351 -- information. If the actual count is not known by the compiler (but
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352 -- is known to be non-zero), then the entry in Unknown will be True.
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353 -- This indicates that the value in Count is not known to be exact,
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354 -- and the actual violation count may be higher.
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355
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356 -- Note: If Violated (K) is True, then either Count (K) > 0 or
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357 -- Unknown (K) = True. It is possible for both these to be set.
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358 -- For example, if Count (K) = 3 and Unknown (K) is True, it means
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359 -- that the actual violation count is at least 3 but might be higher.
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360 end record;
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361
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362 No_Restrictions : constant Restrictions_Info :=
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363 (Set => (others => False),
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364 Value => (others => 0),
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365 Violated => (others => False),
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366 Count => (others => 0),
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367 Unknown => (others => False));
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368 -- Used to initialize Restrictions_Info variables
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369
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370 ----------------------------------
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371 -- Profile Definitions and Data --
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372 ----------------------------------
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373
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374 -- Note: to add a profile, modify the following declarations appropriately,
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375 -- add Name_xxx to Snames, and add a branch to the conditions for pragmas
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376 -- Profile and Profile_Warnings in the body of Sem_Prag.
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377
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378 type Profile_Name is
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379 (No_Profile,
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380 No_Implementation_Extensions,
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381 Restricted_Tasking,
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382 Restricted,
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383 Ravenscar,
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384 GNAT_Extended_Ravenscar,
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385 GNAT_Ravenscar_EDF);
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386 -- Names of recognized profiles. No_Profile is used to indicate that a
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387 -- restriction came from pragma Restrictions[_Warning], as opposed to
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388 -- pragma Profile[_Warning]. Restricted_Tasking is a non-user profile that
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389 -- contaings the minimal set of restrictions to trigger the user of the
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390 -- restricted tasking runtime. Restricted is the corresponding user profile
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391 -- that also restrict protected types.
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392
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393 subtype Profile_Name_Actual is Profile_Name
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394 range No_Implementation_Extensions .. Profile_Name'Last;
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395 -- Actual used profile names
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396
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397 type Profile_Data is record
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398 Set : Restriction_Flags;
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399 -- Set to True if given restriction must be set for the profile, and
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400 -- False if it need not be set (False does not mean that it must not be
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401 -- set, just that it need not be set). If the flag is True for a
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402 -- parameter restriction, then the Value array gives the maximum value
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403 -- permitted by the profile.
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404
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405 Value : Restriction_Values;
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406 -- An entry in this array is meaningful only if the corresponding flag
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407 -- in Set is True. In that case, the value in this array is the maximum
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408 -- value of the parameter permitted by the profile.
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409 end record;
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410
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411 Profile_Info : constant array (Profile_Name_Actual) of Profile_Data := (
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412
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413 -- No_Implementation_Extensions profile
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414
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415 No_Implementation_Extensions =>
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416
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417 (Set =>
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418 (No_Implementation_Aspect_Specifications => True,
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419 No_Implementation_Attributes => True,
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420 No_Implementation_Identifiers => True,
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|
421 No_Implementation_Pragmas => True,
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|
422 No_Implementation_Units => True,
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|
423 others => False),
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424
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425 -- Value settings for Restricted profile (none
|
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426
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427 Value =>
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428 (others => 0)),
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429
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430 -- Restricted_Tasking Profile
|
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431
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432 Restricted_Tasking =>
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433
|
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434 -- Restrictions for Restricted_Tasking profile
|
|
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435
|
|
|
436 (Set =>
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|
|
437 (No_Abort_Statements => True,
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|
|
438 No_Asynchronous_Control => True,
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|
|
439 No_Dynamic_Attachment => True,
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|
|
440 No_Dynamic_Priorities => True,
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|
|
441 No_Local_Protected_Objects => True,
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|
|
442 No_Protected_Type_Allocators => True,
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|
|
443 No_Requeue_Statements => True,
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|
|
444 No_Task_Allocators => True,
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|
|
445 No_Task_Attributes_Package => True,
|
|
|
446 No_Task_Hierarchy => True,
|
|
|
447 No_Terminate_Alternatives => True,
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|
|
448 Max_Asynchronous_Select_Nesting => True,
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|
|
449 Max_Select_Alternatives => True,
|
|
|
450 Max_Task_Entries => True,
|
|
|
451 others => False),
|
|
|
452
|
|
|
453 -- Value settings for Restricted_Tasking profile
|
|
|
454
|
|
|
455 Value =>
|
|
|
456 (Max_Asynchronous_Select_Nesting => 0,
|
|
|
457 Max_Select_Alternatives => 0,
|
|
|
458 Max_Task_Entries => 0,
|
|
|
459 others => 0)),
|
|
|
460
|
|
|
461 -- Restricted Profile
|
|
|
462
|
|
|
463 Restricted =>
|
|
|
464
|
|
|
465 -- Restrictions for Restricted profile
|
|
|
466
|
|
|
467 (Set =>
|
|
|
468 (No_Abort_Statements => True,
|
|
|
469 No_Asynchronous_Control => True,
|
|
|
470 No_Dynamic_Attachment => True,
|
|
|
471 No_Dynamic_Priorities => True,
|
|
|
472 No_Entry_Queue => True,
|
|
|
473 No_Local_Protected_Objects => True,
|
|
|
474 No_Protected_Type_Allocators => True,
|
|
|
475 No_Requeue_Statements => True,
|
|
|
476 No_Task_Allocators => True,
|
|
|
477 No_Task_Attributes_Package => True,
|
|
|
478 No_Task_Hierarchy => True,
|
|
|
479 No_Terminate_Alternatives => True,
|
|
|
480 Max_Asynchronous_Select_Nesting => True,
|
|
|
481 Max_Protected_Entries => True,
|
|
|
482 Max_Select_Alternatives => True,
|
|
|
483 Max_Task_Entries => True,
|
|
|
484 others => False),
|
|
|
485
|
|
|
486 -- Value settings for Restricted profile
|
|
|
487
|
|
|
488 Value =>
|
|
|
489 (Max_Asynchronous_Select_Nesting => 0,
|
|
|
490 Max_Protected_Entries => 1,
|
|
|
491 Max_Select_Alternatives => 0,
|
|
|
492 Max_Task_Entries => 0,
|
|
|
493 others => 0)),
|
|
|
494
|
|
|
495 -- Ravenscar Profile
|
|
|
496
|
|
|
497 -- Note: the table entries here only represent the
|
|
|
498 -- required restriction profile for Ravenscar. The
|
|
|
499 -- full Ravenscar profile also requires:
|
|
|
500
|
|
|
501 -- pragma Dispatching_Policy (FIFO_Within_Priorities);
|
|
|
502 -- pragma Locking_Policy (Ceiling_Locking);
|
|
|
503 -- pragma Detect_Blocking;
|
|
|
504
|
|
|
505 Ravenscar =>
|
|
|
506
|
|
|
507 -- Restrictions for Ravenscar = Restricted profile ..
|
|
|
508
|
|
|
509 (Set =>
|
|
|
510 (No_Abort_Statements => True,
|
|
|
511 No_Asynchronous_Control => True,
|
|
|
512 No_Dynamic_Attachment => True,
|
|
|
513 No_Dynamic_Priorities => True,
|
|
|
514 No_Entry_Queue => True,
|
|
|
515 No_Local_Protected_Objects => True,
|
|
|
516 No_Protected_Type_Allocators => True,
|
|
|
517 No_Requeue_Statements => True,
|
|
|
518 No_Task_Allocators => True,
|
|
|
519 No_Task_Attributes_Package => True,
|
|
|
520 No_Task_Hierarchy => True,
|
|
|
521 No_Terminate_Alternatives => True,
|
|
|
522 Max_Asynchronous_Select_Nesting => True,
|
|
|
523 Max_Protected_Entries => True,
|
|
|
524 Max_Select_Alternatives => True,
|
|
|
525 Max_Task_Entries => True,
|
|
|
526
|
|
|
527 -- plus these additional restrictions:
|
|
|
528
|
|
|
529 No_Calendar => True,
|
|
|
530 No_Implicit_Heap_Allocations => True,
|
|
|
531 No_Local_Timing_Events => True,
|
|
|
532 No_Relative_Delay => True,
|
|
|
533 No_Select_Statements => True,
|
|
|
534 No_Specific_Termination_Handlers => True,
|
|
|
535 No_Task_Termination => True,
|
|
|
536 Simple_Barriers => True,
|
|
|
537 others => False),
|
|
|
538
|
|
|
539 -- Value settings for Ravenscar (same as Restricted)
|
|
|
540
|
|
|
541 Value =>
|
|
|
542 (Max_Asynchronous_Select_Nesting => 0,
|
|
|
543 Max_Protected_Entries => 1,
|
|
|
544 Max_Select_Alternatives => 0,
|
|
|
545 Max_Task_Entries => 0,
|
|
|
546 others => 0)),
|
|
|
547
|
|
|
548 GNAT_Extended_Ravenscar =>
|
|
|
549
|
|
|
550 -- Restrictions for GNAT_Extended_Ravenscar =
|
|
|
551 -- Restricted profile ..
|
|
|
552
|
|
|
553 (Set =>
|
|
|
554 (No_Abort_Statements => True,
|
|
|
555 No_Asynchronous_Control => True,
|
|
|
556 No_Dynamic_Attachment => True,
|
|
|
557 No_Dynamic_Priorities => True,
|
|
|
558 No_Local_Protected_Objects => True,
|
|
|
559 No_Protected_Type_Allocators => True,
|
|
|
560 No_Requeue_Statements => True,
|
|
|
561 No_Task_Allocators => True,
|
|
|
562 No_Task_Attributes_Package => True,
|
|
|
563 No_Task_Hierarchy => True,
|
|
|
564 No_Terminate_Alternatives => True,
|
|
|
565 Max_Asynchronous_Select_Nesting => True,
|
|
|
566 Max_Select_Alternatives => True,
|
|
|
567 Max_Task_Entries => True,
|
|
|
568
|
|
|
569 -- plus these additional restrictions:
|
|
|
570
|
|
|
571 No_Implicit_Task_Allocations => True,
|
|
|
572 No_Implicit_Protected_Object_Allocations
|
|
|
573 => True,
|
|
|
574 No_Local_Timing_Events => True,
|
|
|
575 No_Select_Statements => True,
|
|
|
576 No_Specific_Termination_Handlers => True,
|
|
|
577 No_Task_Termination => True,
|
|
|
578 Pure_Barriers => True,
|
|
|
579 others => False),
|
|
|
580
|
|
|
581 -- Value settings for Ravenscar (same as Restricted)
|
|
|
582
|
|
|
583 Value =>
|
|
|
584 (Max_Asynchronous_Select_Nesting => 0,
|
|
|
585 Max_Select_Alternatives => 0,
|
|
|
586 Max_Task_Entries => 0,
|
|
|
587 others => 0)),
|
|
|
588
|
|
|
589 -- GNAT_Ravenscar_EDF Profile
|
|
|
590
|
|
|
591 -- Note: the table entries here only represent the
|
|
|
592 -- required restriction profile for GNAT_Ravenscar_EDF.
|
|
|
593 -- The full GNAT_Ravenscar_EDF profile also requires:
|
|
|
594
|
|
|
595 -- pragma Dispatching_Policy (EDF_Across_Priorities);
|
|
|
596 -- pragma Locking_Policy (Ceiling_Locking);
|
|
|
597 -- pragma Detect_Blocking;
|
|
|
598
|
|
|
599 GNAT_Ravenscar_EDF =>
|
|
|
600
|
|
|
601 -- Restrictions for Ravenscar = Restricted profile ..
|
|
|
602
|
|
|
603 (Set =>
|
|
|
604 (No_Abort_Statements => True,
|
|
|
605 No_Asynchronous_Control => True,
|
|
|
606 No_Dynamic_Attachment => True,
|
|
|
607 No_Dynamic_Priorities => True,
|
|
|
608 No_Entry_Queue => True,
|
|
|
609 No_Local_Protected_Objects => True,
|
|
|
610 No_Protected_Type_Allocators => True,
|
|
|
611 No_Requeue_Statements => True,
|
|
|
612 No_Task_Allocators => True,
|
|
|
613 No_Task_Attributes_Package => True,
|
|
|
614 No_Task_Hierarchy => True,
|
|
|
615 No_Terminate_Alternatives => True,
|
|
|
616 Max_Asynchronous_Select_Nesting => True,
|
|
|
617 Max_Protected_Entries => True,
|
|
|
618 Max_Select_Alternatives => True,
|
|
|
619 Max_Task_Entries => True,
|
|
|
620
|
|
|
621 -- plus these additional restrictions:
|
|
|
622
|
|
|
623 No_Calendar => True,
|
|
|
624 No_Implicit_Heap_Allocations => True,
|
|
|
625 No_Local_Timing_Events => True,
|
|
|
626 No_Relative_Delay => True,
|
|
|
627 No_Select_Statements => True,
|
|
|
628 No_Specific_Termination_Handlers => True,
|
|
|
629 No_Task_Termination => True,
|
|
|
630 Simple_Barriers => True,
|
|
|
631 others => False),
|
|
|
632
|
|
|
633 -- Value settings for Ravenscar (same as Restricted)
|
|
|
634
|
|
|
635 Value =>
|
|
|
636 (Max_Asynchronous_Select_Nesting => 0,
|
|
|
637 Max_Protected_Entries => 1,
|
|
|
638 Max_Select_Alternatives => 0,
|
|
|
639 Max_Task_Entries => 0,
|
|
|
640 others => 0)));
|
|
|
641
|
|
|
642 end System.Rident;
|
