1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PERF_DSO
3 #define __PERF_DSO
4
5 #include <linux/refcount.h>
6 #include <linux/types.h>
7 #include <linux/rbtree.h>
8 #include <sys/types.h>
9 #include <stdbool.h>
10 #include "rwsem.h"
11 #include <linux/types.h>
12 #include <linux/bitops.h>
13 #include "map.h"
14 #include "namespaces.h"
15 #include "build-id.h"
16
17 enum dso_binary_type {
18 DSO_BINARY_TYPE__KALLSYMS = 0,
19 DSO_BINARY_TYPE__GUEST_KALLSYMS,
20 DSO_BINARY_TYPE__VMLINUX,
21 DSO_BINARY_TYPE__GUEST_VMLINUX,
22 DSO_BINARY_TYPE__JAVA_JIT,
23 DSO_BINARY_TYPE__DEBUGLINK,
24 DSO_BINARY_TYPE__BUILD_ID_CACHE,
25 DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
26 DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
27 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
28 DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
29 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
30 DSO_BINARY_TYPE__GUEST_KMODULE,
31 DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
32 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
33 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
34 DSO_BINARY_TYPE__KCORE,
35 DSO_BINARY_TYPE__GUEST_KCORE,
36 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
37 DSO_BINARY_TYPE__NOT_FOUND,
38 };
39
40 enum dso_kernel_type {
41 DSO_TYPE_USER = 0,
42 DSO_TYPE_KERNEL,
43 DSO_TYPE_GUEST_KERNEL
44 };
45
46 enum dso_swap_type {
47 DSO_SWAP__UNSET,
48 DSO_SWAP__NO,
49 DSO_SWAP__YES,
50 };
51
52 enum dso_data_status {
53 DSO_DATA_STATUS_ERROR = -1,
54 DSO_DATA_STATUS_UNKNOWN = 0,
55 DSO_DATA_STATUS_OK = 1,
56 };
57
58 enum dso_data_status_seen {
59 DSO_DATA_STATUS_SEEN_ITRACE,
60 };
61
62 enum dso_type {
63 DSO__TYPE_UNKNOWN,
64 DSO__TYPE_64BIT,
65 DSO__TYPE_32BIT,
66 DSO__TYPE_X32BIT,
67 };
68
69 enum dso_load_errno {
70 DSO_LOAD_ERRNO__SUCCESS = 0,
71
72 /*
73 * Choose an arbitrary negative big number not to clash with standard
74 * errno since SUS requires the errno has distinct positive values.
75 * See 'Issue 6' in the link below.
76 *
77 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
78 */
79 __DSO_LOAD_ERRNO__START = -10000,
80
81 DSO_LOAD_ERRNO__INTERNAL_ERROR = __DSO_LOAD_ERRNO__START,
82
83 /* for symsrc__init() */
84 DSO_LOAD_ERRNO__INVALID_ELF,
85 DSO_LOAD_ERRNO__CANNOT_READ_BUILDID,
86 DSO_LOAD_ERRNO__MISMATCHING_BUILDID,
87
88 /* for decompress_kmodule */
89 DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE,
90
91 __DSO_LOAD_ERRNO__END,
92 };
93
94 #define DSO__SWAP(dso, type, val) \
95 ({ \
96 type ____r = val; \
97 BUG_ON(dso->needs_swap == DSO_SWAP__UNSET); \
98 if (dso->needs_swap == DSO_SWAP__YES) { \
99 switch (sizeof(____r)) { \
100 case 2: \
101 ____r = bswap_16(val); \
102 break; \
103 case 4: \
104 ____r = bswap_32(val); \
105 break; \
106 case 8: \
107 ____r = bswap_64(val); \
108 break; \
109 default: \
110 BUG_ON(1); \
111 } \
112 } \
113 ____r; \
114 })
115
116 #define DSO__DATA_CACHE_SIZE 4096
117 #define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)
118
119 struct dso_cache {
120 struct rb_node rb_node;
121 u64 offset;
122 u64 size;
123 char data[0];
124 };
125
126 /*
127 * DSOs are put into both a list for fast iteration and rbtree for fast
128 * long name lookup.
129 */
130 struct dsos {
131 struct list_head head;
132 struct rb_root root; /* rbtree root sorted by long name */
133 struct rw_semaphore lock;
134 };
135
136 struct auxtrace_cache;
137
138 struct dso {
139 pthread_mutex_t lock;
140 struct list_head node;
141 struct rb_node rb_node; /* rbtree node sorted by long name */
142 struct rb_root *root; /* root of rbtree that rb_node is in */
143 struct rb_root symbols;
144 struct rb_root symbol_names;
145 struct rb_root inlined_nodes;
146 struct rb_root srclines;
147 struct {
148 u64 addr;
149 struct symbol *symbol;
150 } last_find_result;
151 void *a2l;
152 char *symsrc_filename;
153 unsigned int a2l_fails;
154 enum dso_kernel_type kernel;
155 enum dso_swap_type needs_swap;
156 enum dso_binary_type symtab_type;
157 enum dso_binary_type binary_type;
158 enum dso_load_errno load_errno;
159 u8 adjust_symbols:1;
160 u8 has_build_id:1;
161 u8 has_srcline:1;
162 u8 hit:1;
163 u8 annotate_warned:1;
164 u8 short_name_allocated:1;
165 u8 long_name_allocated:1;
166 u8 is_64_bit:1;
167 bool sorted_by_name;
168 bool loaded;
169 u8 rel;
170 u8 build_id[BUILD_ID_SIZE];
171 u64 text_offset;
172 const char *short_name;
173 const char *long_name;
174 u16 long_name_len;
175 u16 short_name_len;
176 void *dwfl; /* DWARF debug info */
177 struct auxtrace_cache *auxtrace_cache;
178 int comp;
179
180 /* dso data file */
181 struct {
182 struct rb_root cache;
183 int fd;
184 int status;
185 u32 status_seen;
186 size_t file_size;
187 struct list_head open_entry;
188 u64 debug_frame_offset;
189 u64 eh_frame_hdr_offset;
190 } data;
191
192 union { /* Tool specific area */
193 void *priv;
194 u64 db_id;
195 };
196 struct nsinfo *nsinfo;
197 refcount_t refcnt;
198 char name[0];
199 };
200
201 /* dso__for_each_symbol - iterate over the symbols of given type
202 *
203 * @dso: the 'struct dso *' in which symbols itereated
204 * @pos: the 'struct symbol *' to use as a loop cursor
205 * @n: the 'struct rb_node *' to use as a temporary storage
206 */
207 #define dso__for_each_symbol(dso, pos, n) \
208 symbols__for_each_entry(&(dso)->symbols, pos, n)
209
dso__set_loaded(struct dso * dso)210 static inline void dso__set_loaded(struct dso *dso)
211 {
212 dso->loaded = true;
213 }
214
215 struct dso *dso__new(const char *name);
216 void dso__delete(struct dso *dso);
217
218 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
219 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated);
220
221 int dso__name_len(const struct dso *dso);
222
223 struct dso *dso__get(struct dso *dso);
224 void dso__put(struct dso *dso);
225
__dso__zput(struct dso ** dso)226 static inline void __dso__zput(struct dso **dso)
227 {
228 dso__put(*dso);
229 *dso = NULL;
230 }
231
232 #define dso__zput(dso) __dso__zput(&dso)
233
234 bool dso__loaded(const struct dso *dso);
235
dso__has_symbols(const struct dso * dso)236 static inline bool dso__has_symbols(const struct dso *dso)
237 {
238 return !RB_EMPTY_ROOT(&dso->symbols);
239 }
240
241 bool dso__sorted_by_name(const struct dso *dso);
242 void dso__set_sorted_by_name(struct dso *dso);
243 void dso__sort_by_name(struct dso *dso);
244
245 void dso__set_build_id(struct dso *dso, void *build_id);
246 bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
247 void dso__read_running_kernel_build_id(struct dso *dso,
248 struct machine *machine);
249 int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir);
250
251 char dso__symtab_origin(const struct dso *dso);
252 int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type,
253 char *root_dir, char *filename, size_t size);
254 bool is_kernel_module(const char *pathname, int cpumode);
255 bool dso__needs_decompress(struct dso *dso);
256 int dso__decompress_kmodule_fd(struct dso *dso, const char *name);
257 int dso__decompress_kmodule_path(struct dso *dso, const char *name,
258 char *pathname, size_t len);
259
260 #define KMOD_DECOMP_NAME "/tmp/perf-kmod-XXXXXX"
261 #define KMOD_DECOMP_LEN sizeof(KMOD_DECOMP_NAME)
262
263 struct kmod_path {
264 char *name;
265 int comp;
266 bool kmod;
267 };
268
269 int __kmod_path__parse(struct kmod_path *m, const char *path,
270 bool alloc_name);
271
272 #define kmod_path__parse(__m, __p) __kmod_path__parse(__m, __p, false)
273 #define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true)
274
275 void dso__set_module_info(struct dso *dso, struct kmod_path *m,
276 struct machine *machine);
277
278 /*
279 * The dso__data_* external interface provides following functions:
280 * dso__data_get_fd
281 * dso__data_put_fd
282 * dso__data_close
283 * dso__data_size
284 * dso__data_read_offset
285 * dso__data_read_addr
286 *
287 * Please refer to the dso.c object code for each function and
288 * arguments documentation. Following text tries to explain the
289 * dso file descriptor caching.
290 *
291 * The dso__data* interface allows caching of opened file descriptors
292 * to speed up the dso data accesses. The idea is to leave the file
293 * descriptor opened ideally for the whole life of the dso object.
294 *
295 * The current usage of the dso__data_* interface is as follows:
296 *
297 * Get DSO's fd:
298 * int fd = dso__data_get_fd(dso, machine);
299 * if (fd >= 0) {
300 * USE 'fd' SOMEHOW
301 * dso__data_put_fd(dso);
302 * }
303 *
304 * Read DSO's data:
305 * n = dso__data_read_offset(dso_0, &machine, 0, buf, BUFSIZE);
306 * n = dso__data_read_addr(dso_0, &machine, 0, buf, BUFSIZE);
307 *
308 * Eventually close DSO's fd:
309 * dso__data_close(dso);
310 *
311 * It is not necessary to close the DSO object data file. Each time new
312 * DSO data file is opened, the limit (RLIMIT_NOFILE/2) is checked. Once
313 * it is crossed, the oldest opened DSO object is closed.
314 *
315 * The dso__delete function calls close_dso function to ensure the
316 * data file descriptor gets closed/unmapped before the dso object
317 * is freed.
318 *
319 * TODO
320 */
321 int dso__data_get_fd(struct dso *dso, struct machine *machine);
322 void dso__data_put_fd(struct dso *dso);
323 void dso__data_close(struct dso *dso);
324
325 off_t dso__data_size(struct dso *dso, struct machine *machine);
326 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
327 u64 offset, u8 *data, ssize_t size);
328 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
329 struct machine *machine, u64 addr,
330 u8 *data, ssize_t size);
331 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
332
333 struct map *dso__new_map(const char *name);
334 struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
335 const char *short_name, int dso_type);
336
337 void __dsos__add(struct dsos *dsos, struct dso *dso);
338 void dsos__add(struct dsos *dsos, struct dso *dso);
339 struct dso *__dsos__addnew(struct dsos *dsos, const char *name);
340 struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
341 struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
342 struct dso *__dsos__findnew(struct dsos *dsos, const char *name);
343 struct dso *dsos__findnew(struct dsos *dsos, const char *name);
344 bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
345
346 void dso__reset_find_symbol_cache(struct dso *dso);
347
348 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
349 bool (skip)(struct dso *dso, int parm), int parm);
350 size_t __dsos__fprintf(struct list_head *head, FILE *fp);
351
352 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
353 size_t dso__fprintf_symbols_by_name(struct dso *dso, FILE *fp);
354 size_t dso__fprintf(struct dso *dso, FILE *fp);
355
dso__is_vmlinux(struct dso * dso)356 static inline bool dso__is_vmlinux(struct dso *dso)
357 {
358 return dso->binary_type == DSO_BINARY_TYPE__VMLINUX ||
359 dso->binary_type == DSO_BINARY_TYPE__GUEST_VMLINUX;
360 }
361
dso__is_kcore(struct dso * dso)362 static inline bool dso__is_kcore(struct dso *dso)
363 {
364 return dso->binary_type == DSO_BINARY_TYPE__KCORE ||
365 dso->binary_type == DSO_BINARY_TYPE__GUEST_KCORE;
366 }
367
dso__is_kallsyms(struct dso * dso)368 static inline bool dso__is_kallsyms(struct dso *dso)
369 {
370 return dso->kernel && dso->long_name[0] != '/';
371 }
372
373 void dso__free_a2l(struct dso *dso);
374
375 enum dso_type dso__type(struct dso *dso, struct machine *machine);
376
377 int dso__strerror_load(struct dso *dso, char *buf, size_t buflen);
378
379 void reset_fd_limit(void);
380
381 #endif /* __PERF_DSO */
382
