1 /* Code dealing with blocks for GDB.
3 Copyright (C) 2003, 2007, 2008 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
;
33 /* All of the name-scope contours of the program
34 are represented by `struct block' objects.
35 All of these objects are pointed to by the blockvector.
37 Each block represents one name scope.
38 Each lexical context has its own block.
40 The blockvector begins with some special blocks.
41 The GLOBAL_BLOCK contains all the symbols defined in this compilation
42 whose scope is the entire program linked together.
43 The STATIC_BLOCK contains all the symbols whose scope is the
44 entire compilation excluding other separate compilations.
45 Blocks starting with the FIRST_LOCAL_BLOCK are not special.
47 Each block records a range of core addresses for the code that
48 is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
49 give, for the range of code, the entire range of code produced
50 by the compilation that the symbol segment belongs to.
52 The blocks appear in the blockvector
53 in order of increasing starting-address,
54 and, within that, in order of decreasing ending-address.
56 This implies that within the body of one function
57 the blocks appear in the order of a depth-first tree walk. */
62 /* Addresses in the executable code that are in this block. */
67 /* The symbol that names this block, if the block is the body of a
68 function; otherwise, zero. */
70 struct symbol
*function
;
72 /* The `struct block' for the containing block, or 0 if none.
74 The superblock of a top-level local block (i.e. a function in the
75 case of C) is the STATIC_BLOCK. The superblock of the
76 STATIC_BLOCK is the GLOBAL_BLOCK. */
78 struct block
*superblock
;
80 /* This is used to store the symbols in the block. */
82 struct dictionary
*dict
;
84 /* Used for language-specific info. */
90 /* Contains information about namespace-related info relevant to
91 this block: using directives and the current namespace
94 struct block_namespace_info
*namespace;
101 #define BLOCK_START(bl) (bl)->startaddr
102 #define BLOCK_END(bl) (bl)->endaddr
103 #define BLOCK_FUNCTION(bl) (bl)->function
104 #define BLOCK_SUPERBLOCK(bl) (bl)->superblock
105 #define BLOCK_DICT(bl) (bl)->dict
106 #define BLOCK_NAMESPACE(bl) (bl)->language_specific.cplus_specific.namespace
108 /* Macro to loop through all symbols in a block BL, in no particular
109 order. ITER helps keep track of the iteration, and should be a
110 struct dict_iterator. SYM points to the current symbol. */
112 #define ALL_BLOCK_SYMBOLS(block, iter, sym) \
113 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
117 /* Number of blocks in the list. */
119 /* An address map mapping addresses to blocks in this blockvector.
120 This pointer is zero if the blocks' start and end addresses are
123 /* The blocks themselves. */
124 struct block
*block
[1];
127 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
128 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
129 #define BLOCKVECTOR_MAP(blocklist) ((blocklist)->map)
131 /* Special block numbers */
133 enum { GLOBAL_BLOCK
= 0, STATIC_BLOCK
= 1, FIRST_LOCAL_BLOCK
= 2 };
135 extern struct symbol
*block_linkage_function (const struct block
*);
137 extern int contained_in (const struct block
*, const struct block
*);
139 extern struct blockvector
*blockvector_for_pc (CORE_ADDR
, struct block
**);
141 extern struct blockvector
*blockvector_for_pc_sect (CORE_ADDR
,
142 struct obj_section
*,
146 extern struct block
*block_for_pc (CORE_ADDR
);
148 extern struct block
*block_for_pc_sect (CORE_ADDR
, struct obj_section
*);
150 extern const char *block_scope (const struct block
*block
);
152 extern void block_set_scope (struct block
*block
, const char *scope
,
153 struct obstack
*obstack
);
155 extern struct using_direct
*block_using (const struct block
*block
);
157 extern void block_set_using (struct block
*block
,
158 struct using_direct
*using,
159 struct obstack
*obstack
);
161 extern const struct block
*block_static_block (const struct block
*block
);
163 extern const struct block
*block_global_block (const struct block
*block
);
165 extern struct block
*allocate_block (struct obstack
*obstack
);
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