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 <stdio.h>
11#include <linux/bitops.h>
12#include "build-id.h"
13#include "mutex.h"
14
15struct machine;
16struct map;
17struct perf_env;
18
19#define DSO__NAME_KALLSYMS "[kernel.kallsyms]"
20#define DSO__NAME_KCORE "[kernel.kcore]"
21
22enum dso_binary_type {
23 DSO_BINARY_TYPE__KALLSYMS = 0,
24 DSO_BINARY_TYPE__GUEST_KALLSYMS,
25 DSO_BINARY_TYPE__VMLINUX,
26 DSO_BINARY_TYPE__GUEST_VMLINUX,
27 DSO_BINARY_TYPE__JAVA_JIT,
28 DSO_BINARY_TYPE__DEBUGLINK,
29 DSO_BINARY_TYPE__BUILD_ID_CACHE,
30 DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
31 DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
32 DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
33 DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO,
34 DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
35 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
36 DSO_BINARY_TYPE__GUEST_KMODULE,
37 DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
38 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
39 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
40 DSO_BINARY_TYPE__KCORE,
41 DSO_BINARY_TYPE__GUEST_KCORE,
42 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
43 DSO_BINARY_TYPE__BPF_PROG_INFO,
44 DSO_BINARY_TYPE__BPF_IMAGE,
45 DSO_BINARY_TYPE__OOL,
46 DSO_BINARY_TYPE__NOT_FOUND,
47};
48
49enum dso_space_type {
50 DSO_SPACE__USER = 0,
51 DSO_SPACE__KERNEL,
52 DSO_SPACE__KERNEL_GUEST
53};
54
55enum dso_swap_type {
56 DSO_SWAP__UNSET,
57 DSO_SWAP__NO,
58 DSO_SWAP__YES,
59};
60
61enum dso_data_status {
62 DSO_DATA_STATUS_ERROR = -1,
63 DSO_DATA_STATUS_UNKNOWN = 0,
64 DSO_DATA_STATUS_OK = 1,
65};
66
67enum dso_data_status_seen {
68 DSO_DATA_STATUS_SEEN_ITRACE,
69};
70
71enum dso_type {
72 DSO__TYPE_UNKNOWN,
73 DSO__TYPE_64BIT,
74 DSO__TYPE_32BIT,
75 DSO__TYPE_X32BIT,
76};
77
78enum dso_load_errno {
79 DSO_LOAD_ERRNO__SUCCESS = 0,
80
81 /*
82 * Choose an arbitrary negative big number not to clash with standard
83 * errno since SUS requires the errno has distinct positive values.
84 * See 'Issue 6' in the link below.
85 *
86 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
87 */
88 __DSO_LOAD_ERRNO__START = -10000,
89
90 DSO_LOAD_ERRNO__INTERNAL_ERROR = __DSO_LOAD_ERRNO__START,
91
92 /* for symsrc__init() */
93 DSO_LOAD_ERRNO__INVALID_ELF,
94 DSO_LOAD_ERRNO__CANNOT_READ_BUILDID,
95 DSO_LOAD_ERRNO__MISMATCHING_BUILDID,
96
97 /* for decompress_kmodule */
98 DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE,
99
100 __DSO_LOAD_ERRNO__END,
101};
102
103#define DSO__SWAP(dso, type, val) \
104({ \
105 type ____r = val; \
106 BUG_ON(dso->needs_swap == DSO_SWAP__UNSET); \
107 if (dso->needs_swap == DSO_SWAP__YES) { \
108 switch (sizeof(____r)) { \
109 case 2: \
110 ____r = bswap_16(val); \
111 break; \
112 case 4: \
113 ____r = bswap_32(val); \
114 break; \
115 case 8: \
116 ____r = bswap_64(val); \
117 break; \
118 default: \
119 BUG_ON(1); \
120 } \
121 } \
122 ____r; \
123})
124
125#define DSO__DATA_CACHE_SIZE 4096
126#define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)
127
128/*
129 * Data about backing storage DSO, comes from PERF_RECORD_MMAP2 meta events
130 */
131struct dso_id {
132 u32 maj;
133 u32 min;
134 u64 ino;
135 u64 ino_generation;
136};
137
138struct dso_cache {
139 struct rb_node rb_node;
140 u64 offset;
141 u64 size;
142 char data[];
143};
144
145struct auxtrace_cache;
146
147struct dso {
148 struct mutex lock;
149 struct list_head node;
150 struct rb_node rb_node; /* rbtree node sorted by long name */
151 struct rb_root *root; /* root of rbtree that rb_node is in */
152 struct rb_root_cached symbols;
153 struct symbol **symbol_names;
154 size_t symbol_names_len;
155 struct rb_root_cached inlined_nodes;
156 struct rb_root_cached srclines;
157 struct {
158 u64 addr;
159 struct symbol *symbol;
160 } last_find_result;
161 void *a2l;
162 char *symsrc_filename;
163 unsigned int a2l_fails;
164 enum dso_space_type kernel;
165 bool is_kmod;
166 enum dso_swap_type needs_swap;
167 enum dso_binary_type symtab_type;
168 enum dso_binary_type binary_type;
169 enum dso_load_errno load_errno;
170 u8 adjust_symbols:1;
171 u8 has_build_id:1;
172 u8 header_build_id:1;
173 u8 has_srcline:1;
174 u8 hit:1;
175 u8 annotate_warned:1;
176 u8 auxtrace_warned:1;
177 u8 short_name_allocated:1;
178 u8 long_name_allocated:1;
179 u8 is_64_bit:1;
180 bool sorted_by_name;
181 bool loaded;
182 u8 rel;
183 struct build_id bid;
184 u64 text_offset;
185 u64 text_end;
186 const char *short_name;
187 const char *long_name;
188 u16 long_name_len;
189 u16 short_name_len;
190 void *dwfl; /* DWARF debug info */
191 struct auxtrace_cache *auxtrace_cache;
192 int comp;
193
194 /* dso data file */
195 struct {
196 struct rb_root cache;
197 int fd;
198 int status;
199 u32 status_seen;
200 u64 file_size;
201 struct list_head open_entry;
202 u64 elf_base_addr;
203 u64 debug_frame_offset;
204 u64 eh_frame_hdr_addr;
205 u64 eh_frame_hdr_offset;
206 } data;
207 /* bpf prog information */
208 struct {
209 u32 id;
210 u32 sub_id;
211 struct perf_env *env;
212 } bpf_prog;
213
214 union { /* Tool specific area */
215 void *priv;
216 u64 db_id;
217 };
218 struct nsinfo *nsinfo;
219 struct dso_id id;
220 refcount_t refcnt;
221 char name[];
222};
223
224/* dso__for_each_symbol - iterate over the symbols of given type
225 *
226 * @dso: the 'struct dso *' in which symbols are iterated
227 * @pos: the 'struct symbol *' to use as a loop cursor
228 * @n: the 'struct rb_node *' to use as a temporary storage
229 */
230#define dso__for_each_symbol(dso, pos, n) \
231 symbols__for_each_entry(&(dso)->symbols, pos, n)
232
233#define dsos__for_each_with_build_id(pos, head) \
234 list_for_each_entry(pos, head, node) \
235 if (!pos->has_build_id) \
236 continue; \
237 else
238
239static inline void dso__set_loaded(struct dso *dso)
240{
241 dso->loaded = true;
242}
243
244struct dso *dso__new_id(const char *name, struct dso_id *id);
245struct dso *dso__new(const char *name);
246void dso__delete(struct dso *dso);
247
248int dso__cmp_id(struct dso *a, struct dso *b);
249void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
250void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated);
251
252int dso__name_len(const struct dso *dso);
253
254struct dso *dso__get(struct dso *dso);
255void dso__put(struct dso *dso);
256
257static inline void __dso__zput(struct dso **dso)
258{
259 dso__put(dso: *dso);
260 *dso = NULL;
261}
262
263#define dso__zput(dso) __dso__zput(&dso)
264
265bool dso__loaded(const struct dso *dso);
266
267static inline bool dso__has_symbols(const struct dso *dso)
268{
269 return !RB_EMPTY_ROOT(&dso->symbols.rb_root);
270}
271
272char *dso__filename_with_chroot(const struct dso *dso, const char *filename);
273
274bool dso__sorted_by_name(const struct dso *dso);
275void dso__set_sorted_by_name(struct dso *dso);
276void dso__sort_by_name(struct dso *dso);
277
278void dso__set_build_id(struct dso *dso, struct build_id *bid);
279bool dso__build_id_equal(const struct dso *dso, struct build_id *bid);
280void dso__read_running_kernel_build_id(struct dso *dso,
281 struct machine *machine);
282int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir);
283
284char dso__symtab_origin(const struct dso *dso);
285int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type,
286 char *root_dir, char *filename, size_t size);
287bool is_kernel_module(const char *pathname, int cpumode);
288bool dso__needs_decompress(struct dso *dso);
289int dso__decompress_kmodule_fd(struct dso *dso, const char *name);
290int dso__decompress_kmodule_path(struct dso *dso, const char *name,
291 char *pathname, size_t len);
292int filename__decompress(const char *name, char *pathname,
293 size_t len, int comp, int *err);
294
295#define KMOD_DECOMP_NAME "/tmp/perf-kmod-XXXXXX"
296#define KMOD_DECOMP_LEN sizeof(KMOD_DECOMP_NAME)
297
298struct kmod_path {
299 char *name;
300 int comp;
301 bool kmod;
302};
303
304int __kmod_path__parse(struct kmod_path *m, const char *path,
305 bool alloc_name);
306
307#define kmod_path__parse(__m, __p) __kmod_path__parse(__m, __p, false)
308#define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true)
309
310void dso__set_module_info(struct dso *dso, struct kmod_path *m,
311 struct machine *machine);
312
313/*
314 * The dso__data_* external interface provides following functions:
315 * dso__data_get_fd
316 * dso__data_put_fd
317 * dso__data_close
318 * dso__data_size
319 * dso__data_read_offset
320 * dso__data_read_addr
321 * dso__data_write_cache_offs
322 * dso__data_write_cache_addr
323 *
324 * Please refer to the dso.c object code for each function and
325 * arguments documentation. Following text tries to explain the
326 * dso file descriptor caching.
327 *
328 * The dso__data* interface allows caching of opened file descriptors
329 * to speed up the dso data accesses. The idea is to leave the file
330 * descriptor opened ideally for the whole life of the dso object.
331 *
332 * The current usage of the dso__data_* interface is as follows:
333 *
334 * Get DSO's fd:
335 * int fd = dso__data_get_fd(dso, machine);
336 * if (fd >= 0) {
337 * USE 'fd' SOMEHOW
338 * dso__data_put_fd(dso);
339 * }
340 *
341 * Read DSO's data:
342 * n = dso__data_read_offset(dso_0, &machine, 0, buf, BUFSIZE);
343 * n = dso__data_read_addr(dso_0, &machine, 0, buf, BUFSIZE);
344 *
345 * Eventually close DSO's fd:
346 * dso__data_close(dso);
347 *
348 * It is not necessary to close the DSO object data file. Each time new
349 * DSO data file is opened, the limit (RLIMIT_NOFILE/2) is checked. Once
350 * it is crossed, the oldest opened DSO object is closed.
351 *
352 * The dso__delete function calls close_dso function to ensure the
353 * data file descriptor gets closed/unmapped before the dso object
354 * is freed.
355 *
356 * TODO
357*/
358int dso__data_get_fd(struct dso *dso, struct machine *machine);
359void dso__data_put_fd(struct dso *dso);
360void dso__data_close(struct dso *dso);
361
362int dso__data_file_size(struct dso *dso, struct machine *machine);
363off_t dso__data_size(struct dso *dso, struct machine *machine);
364ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
365 u64 offset, u8 *data, ssize_t size);
366ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
367 struct machine *machine, u64 addr,
368 u8 *data, ssize_t size);
369bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
370ssize_t dso__data_write_cache_offs(struct dso *dso, struct machine *machine,
371 u64 offset, const u8 *data, ssize_t size);
372ssize_t dso__data_write_cache_addr(struct dso *dso, struct map *map,
373 struct machine *machine, u64 addr,
374 const u8 *data, ssize_t size);
375
376struct map *dso__new_map(const char *name);
377struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
378 const char *short_name, int dso_type);
379
380void dso__reset_find_symbol_cache(struct dso *dso);
381
382size_t dso__fprintf_symbols_by_name(struct dso *dso, FILE *fp);
383size_t dso__fprintf(struct dso *dso, FILE *fp);
384
385static inline bool dso__is_vmlinux(const struct dso *dso)
386{
387 return dso->binary_type == DSO_BINARY_TYPE__VMLINUX ||
388 dso->binary_type == DSO_BINARY_TYPE__GUEST_VMLINUX;
389}
390
391static inline bool dso__is_kcore(const struct dso *dso)
392{
393 return dso->binary_type == DSO_BINARY_TYPE__KCORE ||
394 dso->binary_type == DSO_BINARY_TYPE__GUEST_KCORE;
395}
396
397static inline bool dso__is_kallsyms(const struct dso *dso)
398{
399 return dso->kernel && dso->long_name[0] != '/';
400}
401
402bool dso__is_object_file(const struct dso *dso);
403
404void dso__free_a2l(struct dso *dso);
405
406enum dso_type dso__type(struct dso *dso, struct machine *machine);
407
408int dso__strerror_load(struct dso *dso, char *buf, size_t buflen);
409
410void reset_fd_limit(void);
411
412#endif /* __PERF_DSO */
413

source code of linux/tools/perf/util/dso.h