1 /* Code dealing with blocks for GDB.
3 Copyright (C) 2003, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 /* Opaque declarations. */
28 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 (real or inlined); 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;
102 #define BLOCK_START(bl) (bl)->startaddr
103 #define BLOCK_END(bl) (bl)->endaddr
104 #define BLOCK_FUNCTION(bl) (bl)->function
105 #define BLOCK_SUPERBLOCK(bl) (bl)->superblock
106 #define BLOCK_DICT(bl) (bl)->dict
107 #define BLOCK_NAMESPACE(bl) (bl)->language_specific.cplus_specific.namespace
109 /* Macro to loop through all symbols in a block BL, in no particular
110 order. ITER helps keep track of the iteration, and should be a
111 struct dict_iterator. SYM points to the current symbol. */
113 #define ALL_BLOCK_SYMBOLS(block, iter, sym) \
114 ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
118 /* Number of blocks in the list. */
120 /* An address map mapping addresses to blocks in this blockvector.
121 This pointer is zero if the blocks' start and end addresses are
124 /* The blocks themselves. */
125 struct block
*block
[1];
128 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
129 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
130 #define BLOCKVECTOR_MAP(blocklist) ((blocklist)->map)
132 /* Special block numbers */
134 enum { GLOBAL_BLOCK
= 0, STATIC_BLOCK
= 1, FIRST_LOCAL_BLOCK
= 2 };
136 extern struct symbol
*block_linkage_function (const struct block
*);
138 extern int block_inlined_p (const struct block
*block
);
140 extern int contained_in (const struct block
*, const struct block
*);
142 extern struct blockvector
*blockvector_for_pc (CORE_ADDR
, struct block
**);
144 extern struct blockvector
*blockvector_for_pc_sect (CORE_ADDR
,
145 struct obj_section
*,
149 extern struct block
*block_for_pc (CORE_ADDR
);
151 extern struct block
*block_for_pc_sect (CORE_ADDR
, struct obj_section
*);
153 extern const char *block_scope (const struct block
*block
);
155 extern void block_set_scope (struct block
*block
, const char *scope
,
156 struct obstack
*obstack
);
158 extern struct using_direct
*block_using (const struct block
*block
);
160 extern void block_set_using (struct block
*block
,
161 struct using_direct
*using,
162 struct obstack
*obstack
);
164 extern const struct block
*block_static_block (const struct block
*block
);
166 extern const struct block
*block_global_block (const struct block
*block
);
168 extern struct block
*allocate_block (struct obstack
*obstack
);
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