1 /* Code dealing with blocks for GDB.
3 Copyright (C) 2003, 2007 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 3 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, see <http://www.gnu.org/licenses/>. */
23 /* Opaque declarations. */
27 struct block_namespace_info
;
32 /* All of the name-scope contours of the program
33 are represented by `struct block' objects.
34 All of these objects are pointed to by the blockvector.
36 Each block represents one name scope.
37 Each lexical context has its own block.
39 The blockvector begins with some special blocks.
40 The GLOBAL_BLOCK contains all the symbols defined in this compilation
41 whose scope is the entire program linked together.
42 The STATIC_BLOCK contains all the symbols whose scope is the
43 entire compilation excluding other separate compilations.
44 Blocks starting with the FIRST_LOCAL_BLOCK are not special.
46 Each block records a range of core addresses for the code that
47 is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
48 give, for the range of code, the entire range of code produced
49 by the compilation that the symbol segment belongs to.
51 The blocks appear in the blockvector
52 in order of increasing starting-address,
53 and, within that, in order of decreasing ending-address.
55 This implies that within the body of one function
56 the blocks appear in the order of a depth-first tree walk. */
61 /* Addresses in the executable code that are in this block. */
66 /* The symbol that names this block, if the block is the body of a
67 function; otherwise, zero. */
69 struct symbol
*function
;
71 /* The `struct block' for the containing block, or 0 if none.
73 The superblock of a top-level local block (i.e. a function in the
74 case of C) is the STATIC_BLOCK. The superblock of the
75 STATIC_BLOCK is the GLOBAL_BLOCK. */
77 struct block
*superblock
;
79 /* This is used to store the symbols in the block. */
81 struct dictionary
*dict
;
83 /* Used for language-specific info. */
89 /* Contains information about namespace-related info relevant to
90 this block: using directives and the current namespace
93 struct block_namespace_info
*namespace;
100 #define BLOCK_START(bl) (bl)->startaddr
101 #define BLOCK_END(bl) (bl)->endaddr
102 #define BLOCK_FUNCTION(bl) (bl)->function
103 #define BLOCK_SUPERBLOCK(bl) (bl)->superblock
104 #define BLOCK_DICT(bl) (bl)->dict
105 #define BLOCK_NAMESPACE(bl) (bl)->language_specific.cplus_specific.namespace
107 /* Macro to loop through all symbols in a block BL, in no particular
108 order. ITER helps keep track of the iteration, and should be a
109 struct dict_iterator. SYM points to the current symbol. */
111 #define ALL_BLOCK_SYMBOLS(block, iter, sym) \
112 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
116 /* Number of blocks in the list. */
118 /* The blocks themselves. */
119 struct block
*block
[1];
122 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
123 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
125 /* Special block numbers */
127 enum { GLOBAL_BLOCK
= 0, STATIC_BLOCK
= 1, FIRST_LOCAL_BLOCK
= 2 };
129 extern struct symbol
*block_function (const struct block
*);
131 extern int contained_in (const struct block
*, const struct block
*);
133 extern struct blockvector
*blockvector_for_pc (CORE_ADDR
, int *);
135 extern struct blockvector
*blockvector_for_pc_sect (CORE_ADDR
, asection
*,
136 int *, struct symtab
*);
138 extern struct block
*block_for_pc (CORE_ADDR
);
140 extern struct block
*block_for_pc_sect (CORE_ADDR
, asection
*);
142 extern const char *block_scope (const struct block
*block
);
144 extern void block_set_scope (struct block
*block
, const char *scope
,
145 struct obstack
*obstack
);
147 extern struct using_direct
*block_using (const struct block
*block
);
149 extern void block_set_using (struct block
*block
,
150 struct using_direct
*using,
151 struct obstack
*obstack
);
153 extern const struct block
*block_static_block (const struct block
*block
);
155 extern const struct block
*block_global_block (const struct block
*block
);
157 extern struct block
*allocate_block (struct obstack
*obstack
);
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