1 /* Code dealing with blocks for GDB.
3 Copyright (C) 2003, 2007-2012 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 #include "dictionary.h"
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 (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
111 /* Number of blocks in the list. */
113 /* An address map mapping addresses to blocks in this blockvector.
114 This pointer is zero if the blocks' start and end addresses are
117 /* The blocks themselves. */
118 struct block
*block
[1];
121 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
122 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
123 #define BLOCKVECTOR_MAP(blocklist) ((blocklist)->map)
125 extern struct symbol
*block_linkage_function (const struct block
*);
127 extern struct symbol
*block_containing_function (const struct block
*);
129 extern int block_inlined_p (const struct block
*block
);
131 extern int contained_in (const struct block
*, const struct block
*);
133 extern struct blockvector
*blockvector_for_pc (CORE_ADDR
, struct block
**);
135 extern struct blockvector
*blockvector_for_pc_sect (CORE_ADDR
,
136 struct obj_section
*,
140 extern struct call_site
*call_site_for_pc (struct gdbarch
*gdbarch
,
143 extern struct block
*block_for_pc (CORE_ADDR
);
145 extern struct block
*block_for_pc_sect (CORE_ADDR
, struct obj_section
*);
147 extern const char *block_scope (const struct block
*block
);
149 extern void block_set_scope (struct block
*block
, const char *scope
,
150 struct obstack
*obstack
);
152 extern struct using_direct
*block_using (const struct block
*block
);
154 extern void block_set_using (struct block
*block
,
155 struct using_direct
*using,
156 struct obstack
*obstack
);
158 extern const struct block
*block_static_block (const struct block
*block
);
160 extern const struct block
*block_global_block (const struct block
*block
);
162 extern struct block
*allocate_block (struct obstack
*obstack
);
165 /* A block iterator. This structure should be treated as though it
166 were opaque; it is only defined here because we want to support
167 stack allocation of iterators. */
169 struct block_iterator
171 /* The underlying dictionary iterator. */
173 struct dict_iterator dict_iter
;
176 /* Initialize ITERATOR to point at the first symbol in BLOCK, and
177 return that first symbol, or NULL if BLOCK is empty. */
179 extern struct symbol
*block_iterator_first (const struct block
*block
,
180 struct block_iterator
*iterator
);
182 /* Advance ITERATOR, and return the next symbol, or NULL if there are
183 no more symbols. Don't call this if you've previously received
184 NULL from block_iterator_first or block_iterator_next on this
187 extern struct symbol
*block_iterator_next (struct block_iterator
*iterator
);
189 /* Initialize ITERATOR to point at the first symbol in BLOCK whose
190 SYMBOL_SEARCH_NAME is NAME (as tested using strcmp_iw), and return
191 that first symbol, or NULL if there are no such symbols. */
193 extern struct symbol
*block_iter_name_first (const struct block
*block
,
195 struct block_iterator
*iterator
);
197 /* Advance ITERATOR to point at the next symbol in BLOCK whose
198 SYMBOL_SEARCH_NAME is NAME (as tested using strcmp_iw), or NULL if
199 there are no more such symbols. Don't call this if you've
200 previously received NULL from block_iterator_first or
201 block_iterator_next on this iteration. And don't call it unless
202 ITERATOR was created by a previous call to block_iter_name_first
203 with the same NAME. */
205 extern struct symbol
*block_iter_name_next (const char *name
,
206 struct block_iterator
*iterator
);
208 /* Initialize ITERATOR to point at the first symbol in BLOCK whose
209 SYMBOL_SEARCH_NAME is NAME, as tested using COMPARE (which must use
210 the same conventions as strcmp_iw and be compatible with any
211 block hashing function), and return that first symbol, or NULL
212 if there are no such symbols. */
214 extern struct symbol
*block_iter_match_first (const struct block
*block
,
216 symbol_compare_ftype
*compare
,
217 struct block_iterator
*iterator
);
219 /* Advance ITERATOR to point at the next symbol in BLOCK whose
220 SYMBOL_SEARCH_NAME is NAME, as tested using COMPARE (see
221 block_iter_match_first), or NULL if there are no more such symbols.
222 Don't call this if you've previously received NULL from
223 block_iterator_match_first or block_iterator_match_next on this
224 iteration. And don't call it unless ITERATOR was created by a
225 previous call to block_iter_match_first with the same NAME and COMPARE. */
227 extern struct symbol
*block_iter_match_next (const char *name
,
228 symbol_compare_ftype
*compare
,
229 struct block_iterator
*iterator
);
231 /* Macro to loop through all symbols in a block BL, in no particular
232 order. ITER helps keep track of the iteration, and should be a
233 struct block_iterator. SYM points to the current symbol. */
235 #define ALL_BLOCK_SYMBOLS(block, iter, sym) \
236 for ((sym) = block_iterator_first ((block), &(iter)); \
238 (sym) = block_iterator_next (&(iter)))
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