------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- E X P _ C H 1 1 -- -- -- -- S p e c -- -- -- -- -- -- Copyright (C) 1992-2000 Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Expand routines for chapter 11 constructs with Types; use Types; package Exp_Ch11 is procedure Expand_N_Exception_Declaration (N : Node_Id); procedure Expand_N_Handled_Sequence_Of_Statements (N : Node_Id); procedure Expand_N_Raise_Constraint_Error (N : Node_Id); procedure Expand_N_Raise_Program_Error (N : Node_Id); procedure Expand_N_Raise_Statement (N : Node_Id); procedure Expand_N_Raise_Storage_Error (N : Node_Id); procedure Expand_N_Subprogram_Info (N : Node_Id); -- Data structures for gathering information to build exception tables -- See runtime routine Ada.Exceptions for full details on the format and -- content of these tables. procedure Initialize; -- Initializes these data structures for a new main unit file procedure Expand_At_End_Handler (HSS : Node_Id; Block : Node_Id); -- Given a handled statement sequence, HSS, for which the At_End_Proc -- field is set, and which currently has no exception handlers, this -- procedure expands the special exception handler required. -- This procedure also create a new scope for the given Block, if -- Block is not Empty. procedure Expand_Exception_Handlers (HSS : Node_Id); -- This procedure expands exception handlers, and is called as part -- of the processing for Expand_N_Handled_Sequence_Of_Statements and -- is also called from Expand_At_End_Handler. N is the handled sequence -- of statements that has the exception handler(s) to be expanded. This -- is also called to expand the special exception handler built for -- accept bodies (see Exp_Ch9.Build_Accept_Body). procedure Generate_Unit_Exception_Table; -- Procedure called by main driver to generate unit exception table if -- zero cost exceptions are enabled. See System.Exceptions for details. function Is_Non_Ada_Error (E : Entity_Id) return Boolean; -- This function is provided for Gigi use. It returns True if operating on -- VMS, and the argument E is the entity for System.Aux_Dec.Non_Ada_Error. -- This is used to generate the special matching code for this exception. procedure Remove_Handler_Entries (N : Node_Id); -- This procedure is called when optimization circuits determine that -- an entire subtree can be removed. If the subtree contains handler -- entries in zero cost exception mode, then such removal can lead to -- dangling references to non-existent handlers in the handler table. -- This procedure removes such references. -------------------------------------- -- Subprogram_Descriptor Generation -- -------------------------------------- -- Subprogram descriptors are required for all subprograms, including -- explicit subprograms defined in the program, subprograms that are -- imported via pragma Import, and also for the implicit elaboration -- subprograms used to elaborate package specs and bodies. procedure Generate_Subprogram_Descriptor_For_Package (N : Node_Id; Spec : Entity_Id); -- This is used to create a descriptor for the implicit elaboration -- procedure for a package spec of body. The compiler only generates -- such descriptors if the package spec or body contains exception -- handlers (either explicitly in the case of a body, or from generic -- package instantiations). N is the node for the package body or -- spec, and Spec is the package body or package entity respectively. -- N must be a compilation unit, and the descriptor is placed at -- the end of the actions for the auxiliary compilation unit node. procedure Generate_Subprogram_Descriptor_For_Subprogram (N : Node_Id; Spec : Entity_Id); -- This is used to create a desriptor for a subprogram, both those -- present in the source, and those implicitly generated by code -- expansion. N is the subprogram body node, and Spec is the entity -- for the subprogram. The descriptor is placed at the end of the -- Last exception handler, or, if there are no handlers, at the end -- of the statement sequence. procedure Generate_Subprogram_Descriptor_For_Imported_Subprogram (Spec : Entity_Id; Slist : List_Id); -- This is used to create a descriptor for an imported subprogram. -- Such descriptors are needed for propagation of exceptions through -- such subprograms. The descriptor never references any handlers, -- and is appended to the given Slist. end Exp_Ch11;