1 /* SPDX-License-Identifier: GPL-2.0 */
6 #include <linux/refcount.h>
7 #include <linux/types.h>
8 #include <linux/rbtree.h>
12 #include <linux/bitops.h>
19 #define DSO__NAME_KALLSYMS "[kernel.kallsyms]"
20 #define DSO__NAME_KCORE "[kernel.kcore]"
22 enum 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__BUILDID_DEBUGINFO,
34 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
35 DSO_BINARY_TYPE__GUEST_KMODULE,
36 DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
37 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
38 DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
39 DSO_BINARY_TYPE__KCORE,
40 DSO_BINARY_TYPE__GUEST_KCORE,
41 DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
42 DSO_BINARY_TYPE__BPF_PROG_INFO,
43 DSO_BINARY_TYPE__NOT_FOUND,
46 enum dso_kernel_type {
58 enum dso_data_status {
59 DSO_DATA_STATUS_ERROR = -1,
60 DSO_DATA_STATUS_UNKNOWN = 0,
61 DSO_DATA_STATUS_OK = 1,
64 enum dso_data_status_seen {
65 DSO_DATA_STATUS_SEEN_ITRACE,
76 DSO_LOAD_ERRNO__SUCCESS = 0,
79 * Choose an arbitrary negative big number not to clash with standard
80 * errno since SUS requires the errno has distinct positive values.
81 * See 'Issue 6' in the link below.
83 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
85 __DSO_LOAD_ERRNO__START = -10000,
87 DSO_LOAD_ERRNO__INTERNAL_ERROR = __DSO_LOAD_ERRNO__START,
89 /* for symsrc__init() */
90 DSO_LOAD_ERRNO__INVALID_ELF,
91 DSO_LOAD_ERRNO__CANNOT_READ_BUILDID,
92 DSO_LOAD_ERRNO__MISMATCHING_BUILDID,
94 /* for decompress_kmodule */
95 DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE,
97 __DSO_LOAD_ERRNO__END,
100 #define DSO__SWAP(dso, type, val) \
103 BUG_ON(dso->needs_swap == DSO_SWAP__UNSET); \
104 if (dso->needs_swap == DSO_SWAP__YES) { \
105 switch (sizeof(____r)) { \
107 ____r = bswap_16(val); \
110 ____r = bswap_32(val); \
113 ____r = bswap_64(val); \
122 #define DSO__DATA_CACHE_SIZE 4096
123 #define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)
126 * Data about backing storage DSO, comes from PERF_RECORD_MMAP2 meta events
136 struct rb_node rb_node;
142 struct auxtrace_cache;
145 pthread_mutex_t lock;
146 struct list_head node;
147 struct rb_node rb_node; /* rbtree node sorted by long name */
148 struct rb_root *root; /* root of rbtree that rb_node is in */
149 struct rb_root_cached symbols;
150 struct rb_root_cached symbol_names;
151 struct rb_root_cached inlined_nodes;
152 struct rb_root_cached srclines;
155 struct symbol *symbol;
158 char *symsrc_filename;
159 unsigned int a2l_fails;
160 enum dso_kernel_type kernel;
161 enum dso_swap_type needs_swap;
162 enum dso_binary_type symtab_type;
163 enum dso_binary_type binary_type;
164 enum dso_load_errno load_errno;
169 u8 annotate_warned:1;
170 u8 short_name_allocated:1;
171 u8 long_name_allocated:1;
176 u8 build_id[BUILD_ID_SIZE];
178 const char *short_name;
179 const char *long_name;
182 void *dwfl; /* DWARF debug info */
183 struct auxtrace_cache *auxtrace_cache;
188 struct rb_root cache;
193 struct list_head open_entry;
194 u64 debug_frame_offset;
195 u64 eh_frame_hdr_offset;
197 /* bpf prog information */
201 struct perf_env *env;
204 union { /* Tool specific area */
208 struct nsinfo *nsinfo;
214 /* dso__for_each_symbol - iterate over the symbols of given type
216 * @dso: the 'struct dso *' in which symbols itereated
217 * @pos: the 'struct symbol *' to use as a loop cursor
218 * @n: the 'struct rb_node *' to use as a temporary storage
220 #define dso__for_each_symbol(dso, pos, n) \
221 symbols__for_each_entry(&(dso)->symbols, pos, n)
223 static inline void dso__set_loaded(struct dso *dso)
228 struct dso *dso__new_id(const char *name, struct dso_id *id);
229 struct dso *dso__new(const char *name);
230 void dso__delete(struct dso *dso);
232 int dso__cmp_id(struct dso *a, struct dso *b);
233 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
234 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated);
236 int dso__name_len(const struct dso *dso);
238 struct dso *dso__get(struct dso *dso);
239 void dso__put(struct dso *dso);
241 static inline void __dso__zput(struct dso **dso)
247 #define dso__zput(dso) __dso__zput(&dso)
249 bool dso__loaded(const struct dso *dso);
251 static inline bool dso__has_symbols(const struct dso *dso)
253 return !RB_EMPTY_ROOT(&dso->symbols.rb_root);
256 bool dso__sorted_by_name(const struct dso *dso);
257 void dso__set_sorted_by_name(struct dso *dso);
258 void dso__sort_by_name(struct dso *dso);
260 void dso__set_build_id(struct dso *dso, void *build_id);
261 bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
262 void dso__read_running_kernel_build_id(struct dso *dso,
263 struct machine *machine);
264 int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir);
266 char dso__symtab_origin(const struct dso *dso);
267 int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type,
268 char *root_dir, char *filename, size_t size);
269 bool is_kernel_module(const char *pathname, int cpumode);
270 bool dso__needs_decompress(struct dso *dso);
271 int dso__decompress_kmodule_fd(struct dso *dso, const char *name);
272 int dso__decompress_kmodule_path(struct dso *dso, const char *name,
273 char *pathname, size_t len);
275 #define KMOD_DECOMP_NAME "/tmp/perf-kmod-XXXXXX"
276 #define KMOD_DECOMP_LEN sizeof(KMOD_DECOMP_NAME)
284 int __kmod_path__parse(struct kmod_path *m, const char *path,
287 #define kmod_path__parse(__m, __p) __kmod_path__parse(__m, __p, false)
288 #define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true)
290 void dso__set_module_info(struct dso *dso, struct kmod_path *m,
291 struct machine *machine);
294 * The dso__data_* external interface provides following functions:
299 * dso__data_read_offset
300 * dso__data_read_addr
301 * dso__data_write_cache_offs
302 * dso__data_write_cache_addr
304 * Please refer to the dso.c object code for each function and
305 * arguments documentation. Following text tries to explain the
306 * dso file descriptor caching.
308 * The dso__data* interface allows caching of opened file descriptors
309 * to speed up the dso data accesses. The idea is to leave the file
310 * descriptor opened ideally for the whole life of the dso object.
312 * The current usage of the dso__data_* interface is as follows:
315 * int fd = dso__data_get_fd(dso, machine);
318 * dso__data_put_fd(dso);
322 * n = dso__data_read_offset(dso_0, &machine, 0, buf, BUFSIZE);
323 * n = dso__data_read_addr(dso_0, &machine, 0, buf, BUFSIZE);
325 * Eventually close DSO's fd:
326 * dso__data_close(dso);
328 * It is not necessary to close the DSO object data file. Each time new
329 * DSO data file is opened, the limit (RLIMIT_NOFILE/2) is checked. Once
330 * it is crossed, the oldest opened DSO object is closed.
332 * The dso__delete function calls close_dso function to ensure the
333 * data file descriptor gets closed/unmapped before the dso object
338 int dso__data_get_fd(struct dso *dso, struct machine *machine);
339 void dso__data_put_fd(struct dso *dso);
340 void dso__data_close(struct dso *dso);
342 int dso__data_file_size(struct dso *dso, struct machine *machine);
343 off_t dso__data_size(struct dso *dso, struct machine *machine);
344 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
345 u64 offset, u8 *data, ssize_t size);
346 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
347 struct machine *machine, u64 addr,
348 u8 *data, ssize_t size);
349 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
350 ssize_t dso__data_write_cache_offs(struct dso *dso, struct machine *machine,
351 u64 offset, const u8 *data, ssize_t size);
352 ssize_t dso__data_write_cache_addr(struct dso *dso, struct map *map,
353 struct machine *machine, u64 addr,
354 const u8 *data, ssize_t size);
356 struct map *dso__new_map(const char *name);
357 struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
358 const char *short_name, int dso_type);
360 void dso__reset_find_symbol_cache(struct dso *dso);
362 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
363 size_t dso__fprintf_symbols_by_name(struct dso *dso, FILE *fp);
364 size_t dso__fprintf(struct dso *dso, FILE *fp);
366 static inline bool dso__is_vmlinux(struct dso *dso)
368 return dso->binary_type == DSO_BINARY_TYPE__VMLINUX ||
369 dso->binary_type == DSO_BINARY_TYPE__GUEST_VMLINUX;
372 static inline bool dso__is_kcore(struct dso *dso)
374 return dso->binary_type == DSO_BINARY_TYPE__KCORE ||
375 dso->binary_type == DSO_BINARY_TYPE__GUEST_KCORE;
378 static inline bool dso__is_kallsyms(struct dso *dso)
380 return dso->kernel && dso->long_name[0] != '/';
383 void dso__free_a2l(struct dso *dso);
385 enum dso_type dso__type(struct dso *dso, struct machine *machine);
387 int dso__strerror_load(struct dso *dso, char *buf, size_t buflen);
389 void reset_fd_limit(void);
391 #endif /* __PERF_DSO */