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ccefe4c4 TT |
1 | /* Private partial symbol table definitions. |
2 | ||
e2882c85 | 3 | Copyright (C) 2009-2018 Free Software Foundation, Inc. |
ccefe4c4 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. */ | |
19 | ||
20 | #ifndef PSYMPRIV_H | |
21 | #define PSYMPRIV_H | |
22 | ||
23 | #include "psymtab.h" | |
906768f9 | 24 | #include "objfiles.h" |
ccefe4c4 TT |
25 | |
26 | /* A partial_symbol records the name, domain, and address class of | |
27 | symbols whose types we have not parsed yet. For functions, it also | |
28 | contains their memory address, so we can find them from a PC value. | |
29 | Each partial_symbol sits in a partial_symtab, all of which are chained | |
95cf5869 | 30 | on a partial symtab list and which points to the corresponding |
ccefe4c4 TT |
31 | normal symtab once the partial_symtab has been referenced. */ |
32 | ||
33 | /* This structure is space critical. See space comments at the top of | |
0df8b418 | 34 | symtab.h. */ |
ccefe4c4 | 35 | |
8a6d4234 | 36 | struct partial_symbol : public general_symbol_info |
ccefe4c4 | 37 | { |
8a6d4234 TT |
38 | /* Return the section for this partial symbol, or nullptr if no |
39 | section has been set. */ | |
40 | struct obj_section *obj_section (struct objfile *objfile) const | |
41 | { | |
42 | if (section >= 0) | |
43 | return &objfile->sections[section]; | |
44 | return nullptr; | |
45 | } | |
ccefe4c4 | 46 | |
02e9e7f7 TT |
47 | /* Return the unrelocated address of this partial symbol. */ |
48 | CORE_ADDR unrelocated_address () const | |
49 | { | |
50 | return value.address; | |
51 | } | |
52 | ||
53 | /* Return the address of this partial symbol, relocated according to | |
54 | the offsets provided in OBJFILE. */ | |
55 | CORE_ADDR address (const struct objfile *objfile) const | |
56 | { | |
57 | return value.address; | |
58 | } | |
59 | ||
60 | /* Set the address of this partial symbol. The address must be | |
61 | unrelocated. */ | |
62 | void set_address (CORE_ADDR addr) | |
63 | { | |
64 | value.address = addr; | |
65 | } | |
66 | ||
ccefe4c4 TT |
67 | /* Name space code. */ |
68 | ||
51cdc993 | 69 | ENUM_BITFIELD(domain_enum_tag) domain : SYMBOL_DOMAIN_BITS; |
ccefe4c4 | 70 | |
f1e6e072 TT |
71 | /* Address class (for info_symbols). Note that we don't allow |
72 | synthetic "aclass" values here at present, simply because there's | |
73 | no need. */ | |
ccefe4c4 | 74 | |
51cdc993 | 75 | ENUM_BITFIELD(address_class) aclass : SYMBOL_ACLASS_BITS; |
ccefe4c4 TT |
76 | }; |
77 | ||
9439a077 TT |
78 | /* A convenience enum to give names to some constants used when |
79 | searching psymtabs. This is internal to psymtab and should not be | |
80 | used elsewhere. */ | |
81 | ||
82 | enum psymtab_search_status | |
83 | { | |
84 | PST_NOT_SEARCHED, | |
85 | PST_SEARCHED_AND_FOUND, | |
86 | PST_SEARCHED_AND_NOT_FOUND | |
87 | }; | |
88 | ||
ccefe4c4 TT |
89 | /* Each source file that has not been fully read in is represented by |
90 | a partial_symtab. This contains the information on where in the | |
91 | executable the debugging symbols for a specific file are, and a | |
92 | list of names of global symbols which are located in this file. | |
93 | They are all chained on partial symtab lists. | |
94 | ||
95 | Even after the source file has been read into a symtab, the | |
96 | partial_symtab remains around. They are allocated on an obstack, | |
97 | objfile_obstack. */ | |
98 | ||
99 | struct partial_symtab | |
100 | { | |
ccefe4c4 TT |
101 | /* Chain of all existing partial symtabs. */ |
102 | ||
103 | struct partial_symtab *next; | |
104 | ||
b4c41fc7 DE |
105 | /* Name of the source file which this partial_symtab defines, |
106 | or if the psymtab is anonymous then a descriptive name for | |
107 | debugging purposes, or "". It must not be NULL. */ | |
ccefe4c4 | 108 | |
72b9f47f | 109 | const char *filename; |
ccefe4c4 TT |
110 | |
111 | /* Full path of the source file. NULL if not known. */ | |
112 | ||
113 | char *fullname; | |
114 | ||
115 | /* Directory in which it was compiled, or NULL if we don't know. */ | |
116 | ||
72b9f47f | 117 | const char *dirname; |
ccefe4c4 | 118 | |
ccefe4c4 | 119 | /* Range of text addresses covered by this file; texthigh is the |
9750bca9 JK |
120 | beginning of the next section. Do not use if PSYMTABS_ADDRMAP_SUPPORTED |
121 | is set. */ | |
ccefe4c4 TT |
122 | |
123 | CORE_ADDR textlow; | |
124 | CORE_ADDR texthigh; | |
125 | ||
9439a077 TT |
126 | /* If NULL, this is an ordinary partial symbol table. |
127 | ||
128 | If non-NULL, this holds a single includer of this partial symbol | |
129 | table, and this partial symbol table is a shared one. | |
130 | ||
131 | A shared psymtab is one that is referenced by multiple other | |
132 | psymtabs, and which conceptually has its contents directly | |
133 | included in those. | |
134 | ||
135 | Shared psymtabs have special semantics. When a search finds a | |
136 | symbol in a shared table, we instead return one of the non-shared | |
137 | tables that include this one. | |
138 | ||
139 | A shared psymtabs can be referred to by other shared ones. | |
140 | ||
141 | The psymtabs that refer to a shared psymtab will list the shared | |
142 | psymtab in their 'dependencies' array. | |
143 | ||
144 | In DWARF terms, a shared psymtab is a DW_TAG_partial_unit; but | |
145 | of course using a name based on that would be too confusing, so | |
146 | "shared" was chosen instead. | |
95cf5869 | 147 | |
9439a077 TT |
148 | Only a single user is needed because, when expanding a shared |
149 | psymtab, we only need to expand its "canonical" non-shared user. | |
150 | The choice of which one should be canonical is left to the | |
151 | debuginfo reader; it can be arbitrary. */ | |
152 | ||
153 | struct partial_symtab *user; | |
154 | ||
e1b06ae2 TT |
155 | /* Array of pointers to all of the partial_symtab's which this one |
156 | depends on. Since this array can only be set to previous or | |
157 | the current (?) psymtab, this dependency tree is guaranteed not | |
158 | to have any loops. "depends on" means that symbols must be read | |
159 | for the dependencies before being read for this psymtab; this is | |
160 | for type references in stabs, where if foo.c includes foo.h, declarations | |
161 | in foo.h may use type numbers defined in foo.c. For other debugging | |
162 | formats there may be no need to use dependencies. */ | |
163 | ||
164 | struct partial_symtab **dependencies; | |
165 | ||
166 | int number_of_dependencies; | |
167 | ||
ccefe4c4 TT |
168 | /* Global symbol list. This list will be sorted after readin to |
169 | improve access. Binary search will be the usual method of | |
0df8b418 | 170 | finding a symbol within it. globals_offset is an integer offset |
ccefe4c4 TT |
171 | within global_psymbols[]. */ |
172 | ||
173 | int globals_offset; | |
174 | int n_global_syms; | |
175 | ||
176 | /* Static symbol list. This list will *not* be sorted after readin; | |
177 | to find a symbol in it, exhaustive search must be used. This is | |
178 | reasonable because searches through this list will eventually | |
179 | lead to either the read in of a files symbols for real (assumed | |
180 | to take a *lot* of time; check) or an error (and we don't care | |
181 | how long errors take). This is an offset and size within | |
182 | static_psymbols[]. */ | |
183 | ||
184 | int statics_offset; | |
185 | int n_static_syms; | |
186 | ||
900c7f9d TT |
187 | /* Non-zero if the symtab corresponding to this psymtab has been |
188 | readin. This is located here so that this structure packs better | |
189 | on 64-bit systems. */ | |
190 | ||
191 | unsigned char readin; | |
192 | ||
9750bca9 JK |
193 | /* True iff objfile->psymtabs_addrmap is properly populated for this |
194 | partial_symtab. For discontiguous overlapping psymtabs is the only usable | |
195 | info in PSYMTABS_ADDRMAP. */ | |
196 | ||
197 | unsigned char psymtabs_addrmap_supported; | |
198 | ||
b4c41fc7 DE |
199 | /* True if the name of this partial symtab is not a source file name. */ |
200 | ||
201 | unsigned char anonymous; | |
202 | ||
9439a077 TT |
203 | /* A flag that is temporarily used when searching psymtabs. */ |
204 | ||
205 | ENUM_BITFIELD (psymtab_search_status) searched_flag : 2; | |
206 | ||
43f3e411 | 207 | /* Pointer to compunit eventually allocated for this source file, 0 if |
ccefe4c4 TT |
208 | !readin or if we haven't looked for the symtab after it was readin. */ |
209 | ||
43f3e411 | 210 | struct compunit_symtab *compunit_symtab; |
ccefe4c4 TT |
211 | |
212 | /* Pointer to function which will read in the symtab corresponding to | |
213 | this psymtab. */ | |
214 | ||
257e7a09 | 215 | void (*read_symtab) (struct partial_symtab *, struct objfile *); |
ccefe4c4 TT |
216 | |
217 | /* Information that lets read_symtab() locate the part of the symbol table | |
218 | that this psymtab corresponds to. This information is private to the | |
219 | format-dependent symbol reading routines. For further detail examine | |
e38df1d0 | 220 | the various symbol reading modules. */ |
ccefe4c4 | 221 | |
e38df1d0 | 222 | void *read_symtab_private; |
ccefe4c4 TT |
223 | }; |
224 | ||
af5bf4ad | 225 | /* Add any kind of symbol to a partial_symbol vector. */ |
923c6a3d | 226 | |
7dc25483 DE |
227 | extern void add_psymbol_to_list (const char *, int, |
228 | int, domain_enum, | |
229 | enum address_class, | |
af5bf4ad | 230 | std::vector<partial_symbol *> *, |
1762568f | 231 | CORE_ADDR, |
7dc25483 | 232 | enum language, struct objfile *); |
923c6a3d TT |
233 | |
234 | extern void init_psymbol_list (struct objfile *, int); | |
235 | ||
236 | extern struct partial_symtab *start_psymtab_common (struct objfile *, | |
923c6a3d | 237 | const char *, CORE_ADDR, |
af5bf4ad SM |
238 | std::vector<partial_symbol *> &, |
239 | std::vector<partial_symbol *> &); | |
923c6a3d | 240 | |
8763cede DE |
241 | extern void end_psymtab_common (struct objfile *, struct partial_symtab *); |
242 | ||
923c6a3d | 243 | extern struct partial_symtab *allocate_psymtab (const char *, |
4e04028d JK |
244 | struct objfile *) |
245 | ATTRIBUTE_NONNULL (1); | |
923c6a3d | 246 | |
5c80ed9d | 247 | extern void discard_psymtab (struct objfile *, struct partial_symtab *); |
923c6a3d | 248 | |
906768f9 TT |
249 | /* Used when recording partial symbol tables. On destruction, |
250 | discards any partial symbol tables that have been built. However, | |
251 | the tables can be kept by calling the "keep" method. */ | |
252 | class psymtab_discarder | |
253 | { | |
254 | public: | |
255 | ||
256 | psymtab_discarder (struct objfile *objfile) | |
257 | : m_objfile (objfile), | |
258 | m_psymtab (objfile->psymtabs) | |
259 | { | |
260 | } | |
261 | ||
262 | ~psymtab_discarder () | |
263 | { | |
264 | if (m_objfile != NULL) | |
265 | while (m_objfile->psymtabs != m_psymtab) | |
266 | discard_psymtab (m_objfile, m_objfile->psymtabs); | |
267 | } | |
268 | ||
269 | /* Keep any partial symbol tables that were built. */ | |
270 | void keep () | |
271 | { | |
272 | m_objfile = NULL; | |
273 | } | |
274 | ||
275 | private: | |
276 | ||
277 | /* The objfile. If NULL this serves as a sentinel to indicate that | |
278 | the psymtabs should be kept. */ | |
279 | struct objfile *m_objfile; | |
280 | /* How far back to free. */ | |
281 | struct partial_symtab *m_psymtab; | |
282 | }; | |
c9bf0622 | 283 | |
ccefe4c4 TT |
284 | /* Traverse all psymtabs in one objfile. */ |
285 | ||
286 | #define ALL_OBJFILE_PSYMTABS(objfile, p) \ | |
287 | for ((p) = (objfile) -> psymtabs; (p) != NULL; (p) = (p) -> next) | |
288 | ||
ccefe4c4 | 289 | #endif /* PSYMPRIV_H */ |