1 /* Code dealing with blocks for GDB.
3 Copyright (C) 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
25 /* Opaque declarations. */
29 struct block_namespace_info
;
34 /* All of the name-scope contours of the program
35 are represented by `struct block' objects.
36 All of these objects are pointed to by the blockvector.
38 Each block represents one name scope.
39 Each lexical context has its own block.
41 The blockvector begins with some special blocks.
42 The GLOBAL_BLOCK contains all the symbols defined in this compilation
43 whose scope is the entire program linked together.
44 The STATIC_BLOCK contains all the symbols whose scope is the
45 entire compilation excluding other separate compilations.
46 Blocks starting with the FIRST_LOCAL_BLOCK are not special.
48 Each block records a range of core addresses for the code that
49 is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
50 give, for the range of code, the entire range of code produced
51 by the compilation that the symbol segment belongs to.
53 The blocks appear in the blockvector
54 in order of increasing starting-address,
55 and, within that, in order of decreasing ending-address.
57 This implies that within the body of one function
58 the blocks appear in the order of a depth-first tree walk. */
63 /* Addresses in the executable code that are in this block. */
68 /* The symbol that names this block, if the block is the body of a
69 function; otherwise, zero. */
71 struct symbol
*function
;
73 /* The `struct block' for the containing block, or 0 if none.
75 The superblock of a top-level local block (i.e. a function in the
76 case of C) is the STATIC_BLOCK. The superblock of the
77 STATIC_BLOCK is the GLOBAL_BLOCK. */
79 struct block
*superblock
;
81 /* This is used to store the symbols in the block. */
83 struct dictionary
*dict
;
85 /* Used for language-specific info. */
91 /* Contains information about namespace-related info relevant to
92 this block: using directives and the current namespace
95 struct block_namespace_info
*namespace;
101 /* Version of GCC used to compile the function corresponding
102 to this block, or 0 if not compiled with GCC. When possible,
103 GCC should be compatible with the native compiler, or if that
104 is not feasible, the differences should be fixed during symbol
105 reading. As of 16 Apr 93, this flag is never used to distinguish
106 between gcc2 and the native compiler.
108 If there is no function corresponding to this block, this meaning
109 of this flag is undefined. */
111 unsigned char gcc_compile_flag
;
114 #define BLOCK_START(bl) (bl)->startaddr
115 #define BLOCK_END(bl) (bl)->endaddr
116 #define BLOCK_FUNCTION(bl) (bl)->function
117 #define BLOCK_SUPERBLOCK(bl) (bl)->superblock
118 #define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag
119 #define BLOCK_DICT(bl) (bl)->dict
120 #define BLOCK_NAMESPACE(bl) (bl)->language_specific.cplus_specific.namespace
122 /* Macro to loop through all symbols in a block BL, in no particular
123 order. ITER helps keep track of the iteration, and should be a
124 struct dict_iterator. SYM points to the current symbol. */
126 #define ALL_BLOCK_SYMBOLS(block, iter, sym) \
127 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
131 /* Number of blocks in the list. */
133 /* The blocks themselves. */
134 struct block
*block
[1];
137 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
138 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
140 /* Special block numbers */
142 enum { GLOBAL_BLOCK
= 0, STATIC_BLOCK
= 1, FIRST_LOCAL_BLOCK
= 2 };
144 extern struct symbol
*block_function (const struct block
*);
146 extern int contained_in (const struct block
*, const struct block
*);
148 extern struct blockvector
*blockvector_for_pc (CORE_ADDR
, int *);
150 extern struct blockvector
*blockvector_for_pc_sect (CORE_ADDR
, asection
*,
151 int *, struct symtab
*);
153 extern struct block
*block_for_pc (CORE_ADDR
);
155 extern struct block
*block_for_pc_sect (CORE_ADDR
, asection
*);
157 extern const char *block_scope (const struct block
*block
);
159 extern void block_set_scope (struct block
*block
, const char *scope
,
160 struct obstack
*obstack
);
162 extern struct using_direct
*block_using (const struct block
*block
);
164 extern void block_set_using (struct block
*block
,
165 struct using_direct
*using,
166 struct obstack
*obstack
);
168 extern const struct block
*block_static_block (const struct block
*block
);
170 extern const struct block
*block_global_block (const struct block
*block
);
172 extern struct block
*allocate_block (struct obstack
*obstack
);
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