-- --
-- B o d y --
-- --
--- Copyright (C) 1996-2006, Free Software Foundation, Inc. --
+-- Copyright (C) 1996-2007, 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- --
with Atree; use Atree;
with Debug; use Debug;
with Einfo; use Einfo;
-with Namet; use Namet;
with Nlists; use Nlists;
with Nmake; use Nmake;
with Opt; use Opt;
Has_Suffix : Boolean;
begin
- -- If not generating code, there is no need to create encoded
- -- names, and problems when the back-end is called to annotate
- -- types without full code generation. See comments at beginning
- -- of Get_External_Name_With_Suffix for additional details.
+ -- If not generating code, there is no need to create encoded names, and
+ -- problems when the back-end is called to annotate types without full
+ -- code generation. See comments in Get_External_Name_With_Suffix for
+ -- additional details.
- if Operating_Mode /= Generate_Code then
+ -- However we do create encoded names if the back end is active, even
+ -- if Operating_Mode got reset. Otherwise any serious error reported
+ -- by the backend calling Error_Msg changes the Compilation_Mode to
+ -- Check_Semantics, which disables the functionality of this routine,
+ -- causing the generation of spurious additional errors.
+
+ -- Couldn't we just test Original_Operating_Mode here? ???
+
+ if Operating_Mode /= Generate_Code
+ and then not Generating_Code
+ then
return;
end if;
-- --
-- S p e c --
-- --
--- Copyright (C) 1996-2006, Free Software Foundation, Inc. --
+-- Copyright (C) 1996-2007, 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- --
-- debugger. In accordance with the Dwarf 2.2 specification, certain
-- type names are encoded to provide information to the debugger.
+with Namet; use Namet;
with Types; use Types;
with Uintp; use Uintp;
-- are the enclosing scopes (not including Standard at the start).
-- The encoding of the name follows this basic qualified naming scheme,
- -- where the encoding of individual entity names is as described in
- -- Namet (i.e. in particular names present in the original source are
- -- folded to all lower case, with upper half and wide characters encoded
- -- as described in Namet). Upper case letters are used only for entities
- -- generated by the compiler.
+ -- where the encoding of individual entity names is as described in Namet
+ -- (i.e. in particular names present in the original source are folded to
+ -- all lower case, with upper half and wide characters encoded as described
+ -- in Namet). Upper case letters are used only for entities generated by
+ -- the compiler.
-- There are two cases, global entities, and local entities. In more formal
-- terms, local entities are those which have a dynamic enclosing scope,
-- The bounds may be any integral type. In the case of an enumeration
-- type, Enum_Rep values are used.
- -- The debugging information will sometimes reference an anonymous fat
- -- pointer type. Such types are given the name xxx___XUP, where xxx is
- -- the name of the designated type. If the debugger is asked to output
- -- such a type name, the appropriate form is "access xxx".
+ -- For a given unconstrained array type, the compiler will generate one
+ -- fat-pointer type whose name is "arr___XUP", where "arr" is the name
+ -- of the array type, and use it to represent the array type itself in
+ -- the debugging information.
+ -- For each pointer to this unconstrained array type, the compiler will
+ -- generate a typedef that points to the above "arr___XUP" fat-pointer
+ -- type. As a consequence, when it comes to fat-pointer types:
+
+ -- 1. The type name is given by the typedef
+
+ -- 2. If the debugger is asked to output the type, the appropriate
+ -- form is "access arr", except if the type name is "arr___XUP"
+ -- for which it is the array definition.
-- Thin Pointers
-- are missing and deal as best as it can with the limited information
-- available.
+ ---------------------------------
+ -- GNAT Extensions to DWARF2/3 --
+ ---------------------------------
+
+ -- If the compiler switch "-gdwarf+" is specified, GNAT Vendor extensions
+ -- to DWARF2/3 are generated, with the following variations from the above
+ -- specification.
+
+ -- Change in the contents of the DW_AT_name attribute.
+ -- The operators are represented in their natural form. (Ie, the addition
+ -- operator is written as "+" instead of "Oadd").
+ -- The component separation string is "." instead of "__"
+
+ -- Introduction of DW_AT_GNAT_encoding, encoded with value 0x2301.
+ -- Any debugging information entry representing a program entity, named
+ -- or implicit, may have a DW_AT_GNAT_encoding attribute. The value of
+ -- this attribute is a string representing the suffix internally added
+ -- by GNAT for various purposes, mainly for representing debug
+ -- information compatible with other formats.
+
+ -- If a debugging information entry has multiple encodings, all of them
+ -- will be listed in DW_AT_GNAT_encoding. The separator for this list
+ -- is ':'.
+
+ -- Introduction of DW_AT_GNAT_descriptive_type, encoded with value 0x2302
+ -- Any debugging information entry representing a type may have a
+ -- DW_AT_GNAT_descriptive_type attribute whose value is a reference,
+ -- pointing to a debugging information entry representing another type
+ -- associated to the type.
+
+ -- Modification of the contents of the DW_AT_producer string.
+ -- When emitting full GNAT Vendor extensions to DWARF2/3, "-gdwarf+"
+ -- is appended to the DW_AT_producer string.
+ --
+ -- When emitting only DW_AT_GNAT_descriptive_type, "-gdwarf+-" is
+ -- appended to the DW_AT_producer string.
+
end Exp_Dbug;
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