Commit | Line | Data |
---|---|---|
c40a57e5 | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
c40a57e5 AB |
3 | * |
4 | * Copyright 2015 Antoine Busque <abusque@efficios.com> | |
5 | * | |
0235b0db | 6 | * Babeltrace - DWARF Information Reader |
c40a57e5 AB |
7 | */ |
8 | ||
c4f23e30 FD |
9 | #include <stdbool.h> |
10 | ||
c40a57e5 | 11 | #include <glib.h> |
c4f23e30 | 12 | |
4f45f9bb | 13 | #include "dwarf.h" |
c40a57e5 AB |
14 | |
15 | BT_HIDDEN | |
16 | struct bt_dwarf_cu *bt_dwarf_cu_create(Dwarf *dwarf_info) | |
17 | { | |
18 | struct bt_dwarf_cu *cu; | |
19 | ||
20 | if (!dwarf_info) { | |
21 | goto error; | |
22 | } | |
23 | ||
24 | cu = g_new0(struct bt_dwarf_cu, 1); | |
25 | if (!cu) { | |
26 | goto error; | |
27 | } | |
28 | cu->dwarf_info = dwarf_info; | |
29 | return cu; | |
30 | ||
31 | error: | |
32 | return NULL; | |
33 | } | |
34 | ||
35 | BT_HIDDEN | |
36 | void bt_dwarf_cu_destroy(struct bt_dwarf_cu *cu) | |
37 | { | |
38 | g_free(cu); | |
39 | } | |
40 | ||
41 | BT_HIDDEN | |
42 | int bt_dwarf_cu_next(struct bt_dwarf_cu *cu) | |
43 | { | |
44 | int ret; | |
45 | Dwarf_Off next_offset; | |
46 | size_t cu_header_size; | |
47 | ||
48 | if (!cu) { | |
49 | ret = -1; | |
50 | goto end; | |
51 | } | |
52 | ||
53 | ret = dwarf_nextcu(cu->dwarf_info, cu->next_offset, &next_offset, | |
54 | &cu_header_size, NULL, NULL, NULL); | |
55 | if (ret) { | |
56 | /* ret is -1 on error, 1 if no next CU. */ | |
57 | goto end; | |
58 | } | |
59 | ||
60 | cu->offset = cu->next_offset; | |
61 | cu->next_offset = next_offset; | |
62 | cu->header_size = cu_header_size; | |
63 | ||
64 | end: | |
65 | return ret; | |
66 | } | |
67 | ||
68 | BT_HIDDEN | |
69 | struct bt_dwarf_die *bt_dwarf_die_create(struct bt_dwarf_cu *cu) | |
70 | { | |
71 | Dwarf_Die *dwarf_die = NULL; | |
72 | struct bt_dwarf_die *die = NULL; | |
73 | ||
74 | if (!cu) { | |
75 | goto error; | |
76 | } | |
77 | ||
78 | dwarf_die = g_new0(Dwarf_Die, 1); | |
79 | if (!dwarf_die) { | |
80 | goto error; | |
81 | } | |
82 | ||
83 | dwarf_die = dwarf_offdie(cu->dwarf_info, cu->offset + cu->header_size, | |
84 | dwarf_die); | |
85 | if (!dwarf_die) { | |
86 | goto error; | |
87 | } | |
88 | ||
89 | die = g_new0(struct bt_dwarf_die, 1); | |
90 | if (!die) { | |
91 | goto error; | |
92 | } | |
93 | ||
94 | die->cu = cu; | |
95 | die->dwarf_die = dwarf_die; | |
96 | die->depth = 0; | |
97 | ||
98 | return die; | |
99 | ||
100 | error: | |
101 | g_free(dwarf_die); | |
102 | g_free(die); | |
103 | return NULL; | |
104 | } | |
105 | ||
106 | BT_HIDDEN | |
107 | void bt_dwarf_die_destroy(struct bt_dwarf_die *die) | |
108 | { | |
109 | if (!die) { | |
110 | return; | |
111 | } | |
112 | ||
113 | g_free(die->dwarf_die); | |
114 | g_free(die); | |
115 | } | |
116 | ||
e6365242 FD |
117 | BT_HIDDEN |
118 | int bt_dwarf_die_has_children(struct bt_dwarf_die *die) | |
119 | { | |
120 | return dwarf_haschildren(die->dwarf_die); | |
121 | } | |
122 | ||
c40a57e5 AB |
123 | BT_HIDDEN |
124 | int bt_dwarf_die_child(struct bt_dwarf_die *die) | |
125 | { | |
126 | int ret; | |
127 | Dwarf_Die *child_die = NULL; | |
128 | ||
129 | if (!die) { | |
130 | ret = -1; | |
131 | goto error; | |
132 | } | |
133 | ||
134 | child_die = g_new0(Dwarf_Die, 1); | |
135 | if (!child_die) { | |
136 | ret = -1; | |
137 | goto error; | |
138 | } | |
139 | ||
140 | ret = dwarf_child(die->dwarf_die, child_die); | |
141 | if (ret) { | |
142 | /* ret is -1 on error, 1 if no child DIE. */ | |
143 | goto error; | |
144 | } | |
145 | ||
146 | g_free(die->dwarf_die); | |
147 | die->dwarf_die = child_die; | |
148 | die->depth++; | |
149 | return 0; | |
150 | ||
151 | error: | |
152 | g_free(child_die); | |
153 | return ret; | |
154 | } | |
155 | ||
156 | BT_HIDDEN | |
157 | int bt_dwarf_die_next(struct bt_dwarf_die *die) | |
158 | { | |
159 | int ret; | |
160 | Dwarf_Die *next_die = NULL; | |
161 | ||
162 | if (!die) { | |
163 | ret = -1; | |
164 | goto error; | |
165 | } | |
166 | ||
167 | next_die = g_new0(Dwarf_Die, 1); | |
168 | if (!next_die) { | |
169 | ret = -1; | |
170 | goto error; | |
171 | } | |
172 | ||
173 | if (die->depth == 0) { | |
174 | ret = dwarf_child(die->dwarf_die, next_die); | |
175 | if (ret) { | |
176 | /* ret is -1 on error, 1 if no child DIE. */ | |
177 | goto error; | |
178 | } | |
179 | ||
180 | die->depth = 1; | |
181 | } else { | |
182 | ret = dwarf_siblingof(die->dwarf_die, next_die); | |
183 | if (ret) { | |
184 | /* ret is -1 on error, 1 if we reached end of | |
185 | * DIEs at this depth. */ | |
186 | goto error; | |
187 | } | |
188 | } | |
189 | ||
190 | g_free(die->dwarf_die); | |
191 | die->dwarf_die = next_die; | |
192 | return 0; | |
193 | ||
194 | error: | |
195 | g_free(next_die); | |
196 | return ret; | |
197 | } | |
198 | ||
199 | BT_HIDDEN | |
200 | int bt_dwarf_die_get_tag(struct bt_dwarf_die *die, int *tag) | |
201 | { | |
202 | int _tag; | |
203 | ||
204 | if (!die || !tag) { | |
205 | goto error; | |
206 | } | |
207 | ||
208 | _tag = dwarf_tag(die->dwarf_die); | |
209 | if (_tag == DW_TAG_invalid) { | |
210 | goto error; | |
211 | } | |
212 | ||
213 | *tag = _tag; | |
214 | return 0; | |
215 | ||
216 | error: | |
217 | return -1; | |
218 | } | |
219 | ||
220 | BT_HIDDEN | |
221 | int bt_dwarf_die_get_name(struct bt_dwarf_die *die, char **name) | |
222 | { | |
223 | const char *_name; | |
224 | ||
225 | if (!die || !name) { | |
226 | goto error; | |
227 | } | |
228 | ||
229 | _name = dwarf_diename(die->dwarf_die); | |
230 | if (!_name) { | |
231 | goto error; | |
232 | } | |
233 | ||
06d1cf5d | 234 | *name = g_strdup(_name); |
c40a57e5 AB |
235 | if (!*name) { |
236 | goto error; | |
237 | } | |
238 | ||
239 | return 0; | |
240 | ||
241 | error: | |
242 | return -1; | |
243 | } | |
244 | ||
245 | BT_HIDDEN | |
246 | int bt_dwarf_die_get_call_file(struct bt_dwarf_die *die, char **filename) | |
247 | { | |
248 | int ret; | |
249 | Dwarf_Sword file_no; | |
250 | const char *_filename = NULL; | |
251 | Dwarf_Files *src_files = NULL; | |
252 | Dwarf_Attribute *file_attr = NULL; | |
253 | struct bt_dwarf_die *cu_die = NULL; | |
254 | ||
255 | if (!die || !filename) { | |
256 | goto error; | |
257 | } | |
258 | ||
259 | file_attr = g_new0(Dwarf_Attribute, 1); | |
260 | if (!file_attr) { | |
261 | goto error; | |
262 | } | |
263 | ||
264 | file_attr = dwarf_attr(die->dwarf_die, DW_AT_call_file, file_attr); | |
265 | if (!file_attr) { | |
266 | goto error; | |
267 | } | |
268 | ||
269 | ret = dwarf_formsdata(file_attr, &file_no); | |
270 | if (ret) { | |
271 | goto error; | |
272 | } | |
273 | ||
274 | cu_die = bt_dwarf_die_create(die->cu); | |
275 | if (!cu_die) { | |
276 | goto error; | |
277 | } | |
278 | ||
279 | ret = dwarf_getsrcfiles(cu_die->dwarf_die, &src_files, NULL); | |
280 | if (ret) { | |
281 | goto error; | |
282 | } | |
283 | ||
284 | _filename = dwarf_filesrc(src_files, file_no, NULL, NULL); | |
285 | if (!_filename) { | |
286 | goto error; | |
287 | } | |
288 | ||
06d1cf5d | 289 | *filename = g_strdup(_filename); |
c40a57e5 AB |
290 | |
291 | bt_dwarf_die_destroy(cu_die); | |
292 | g_free(file_attr); | |
293 | ||
294 | return 0; | |
295 | ||
296 | error: | |
297 | bt_dwarf_die_destroy(cu_die); | |
298 | g_free(file_attr); | |
299 | ||
300 | return -1; | |
301 | } | |
302 | ||
303 | BT_HIDDEN | |
304 | int bt_dwarf_die_get_call_line(struct bt_dwarf_die *die, | |
305 | uint64_t *line_no) | |
306 | { | |
307 | int ret = 0; | |
308 | Dwarf_Attribute *line_attr = NULL; | |
309 | uint64_t _line_no; | |
310 | ||
311 | if (!die || !line_no) { | |
312 | goto error; | |
313 | } | |
314 | ||
315 | line_attr = g_new0(Dwarf_Attribute, 1); | |
316 | if (!line_attr) { | |
317 | goto error; | |
318 | } | |
319 | ||
320 | line_attr = dwarf_attr(die->dwarf_die, DW_AT_call_line, line_attr); | |
321 | if (!line_attr) { | |
322 | goto error; | |
323 | } | |
324 | ||
325 | ret = dwarf_formudata(line_attr, &_line_no); | |
326 | if (ret) { | |
327 | goto error; | |
328 | } | |
329 | ||
330 | *line_no = _line_no; | |
331 | g_free(line_attr); | |
332 | ||
333 | return 0; | |
334 | ||
335 | error: | |
336 | g_free(line_attr); | |
337 | ||
338 | return -1; | |
339 | } | |
340 | ||
341 | BT_HIDDEN | |
342 | int bt_dwarf_die_contains_addr(struct bt_dwarf_die *die, uint64_t addr, | |
a54aa699 | 343 | bool *contains) |
c40a57e5 AB |
344 | { |
345 | int ret; | |
346 | ||
347 | ret = dwarf_haspc(die->dwarf_die, addr); | |
348 | if (ret == -1) { | |
349 | goto error; | |
350 | } | |
351 | ||
a54aa699 | 352 | *contains = (ret == 1); |
c40a57e5 AB |
353 | |
354 | return 0; | |
355 | ||
356 | error: | |
357 | return -1; | |
358 | } |