1 /* SPDX-License-Identifier: GPL-2.0 */
3 #define __PERF_SYMBOL 1
5 #include <linux/types.h>
8 #include <linux/list.h>
9 #include <linux/rbtree.h>
11 #include "map_symbol.h"
14 #include "symbol_conf.h"
16 #ifdef HAVE_LIBELF_SUPPORT
29 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
30 * for newer versions we can use mmap to reduce memory usage:
32 #ifdef HAVE_LIBELF_MMAP_SUPPORT
33 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
35 # define PERF_ELF_C_READ_MMAP ELF_C_READ
38 #ifdef HAVE_LIBELF_SUPPORT
39 Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
40 GElf_Shdr *shp, const char *name, size_t *idx);
43 /** struct symbol - symtab entry
45 * @ignore - resolvable but tools ignore it (e.g. idle routines)
48 struct rb_node rb_node;
62 void symbol__delete(struct symbol *sym);
63 void symbols__delete(struct rb_root_cached *symbols);
65 /* symbols__for_each_entry - iterate over symbols (rb_root)
67 * @symbols: the rb_root of symbols
68 * @pos: the 'struct symbol *' to use as a loop cursor
69 * @nd: the 'struct rb_node *' to use as a temporary storage
71 #define symbols__for_each_entry(symbols, pos, nd) \
72 for (nd = rb_first_cached(symbols); \
73 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
76 static inline size_t symbol__size(const struct symbol *sym)
78 return sym->end - sym->start;
84 struct symbol_name_rb_node {
85 struct rb_node rb_node;
89 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
91 return path__join(bf, size, symbol_conf.symfs, path);
94 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
96 extern int vmlinux_path__nr_entries;
97 extern char **vmlinux_path;
99 static inline void *symbol__priv(struct symbol *sym)
101 return ((void *)sym) - symbol_conf.priv_size;
104 struct ref_reloc_sym {
107 u64 unrelocated_addr;
111 struct addr_map_symbol from;
112 struct addr_map_symbol to;
113 struct branch_flags flags;
119 struct addr_map_symbol iaddr;
120 struct addr_map_symbol daddr;
121 union perf_mem_data_src data_src;
136 struct addr_location {
137 struct machine *machine;
138 struct thread *thread;
153 enum dso_binary_type type;
155 #ifdef HAVE_LIBELF_SUPPORT
175 void symsrc__destroy(struct symsrc *ss);
176 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
177 enum dso_binary_type type);
178 bool symsrc__has_symtab(struct symsrc *ss);
179 bool symsrc__possibly_runtime(struct symsrc *ss);
181 int dso__load(struct dso *dso, struct map *map);
182 int dso__load_vmlinux(struct dso *dso, struct map *map,
183 const char *vmlinux, bool vmlinux_allocated);
184 int dso__load_vmlinux_path(struct dso *dso, struct map *map);
185 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
187 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
189 void dso__insert_symbol(struct dso *dso,
192 struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
193 struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name);
195 struct symbol *symbol__next_by_name(struct symbol *sym);
197 struct symbol *dso__first_symbol(struct dso *dso);
198 struct symbol *dso__last_symbol(struct dso *dso);
199 struct symbol *dso__next_symbol(struct symbol *sym);
201 enum dso_type dso__type_fd(int fd);
203 int filename__read_build_id(const char *filename, void *bf, size_t size);
204 int sysfs__read_build_id(const char *filename, void *bf, size_t size);
205 int modules__parse(const char *filename, void *arg,
206 int (*process_module)(void *arg, const char *name,
207 u64 start, u64 size));
208 int filename__read_debuglink(const char *filename, char *debuglink,
212 int symbol__init(struct perf_env *env);
213 void symbol__exit(void);
214 void symbol__elf_init(void);
215 int symbol__annotation_init(void);
217 struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
218 size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
219 const struct addr_location *al,
220 bool unknown_as_addr,
221 bool print_offsets, FILE *fp);
222 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
223 const struct addr_location *al, FILE *fp);
224 size_t __symbol__fprintf_symname(const struct symbol *sym,
225 const struct addr_location *al,
226 bool unknown_as_addr, FILE *fp);
227 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
228 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
229 bool symbol__restricted_filename(const char *filename,
230 const char *restricted_filename);
231 int symbol__config_symfs(const struct option *opt __maybe_unused,
232 const char *dir, int unset __maybe_unused);
234 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
235 struct symsrc *runtime_ss, int kmodule);
236 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
238 char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
240 void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
242 void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
243 void symbols__fixup_duplicate(struct rb_root_cached *symbols);
244 void symbols__fixup_end(struct rb_root_cached *symbols);
245 void map_groups__fixup_end(struct map_groups *mg);
247 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
248 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
251 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
253 struct kcore_extract {
254 char *kcore_filename;
258 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
262 int kcore_extract__create(struct kcore_extract *kce);
263 void kcore_extract__delete(struct kcore_extract *kce);
265 int kcore_copy(const char *from_dir, const char *to_dir);
266 int compare_proc_modules(const char *from, const char *to);
268 int setup_list(struct strlist **list, const char *list_str,
269 const char *list_name);
270 int setup_intlist(struct intlist **list, const char *list_str,
271 const char *list_name);
273 #ifdef HAVE_LIBELF_SUPPORT
274 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
275 void arch__sym_update(struct symbol *s, GElf_Sym *sym);
278 const char *arch__normalize_symbol_name(const char *name);
282 void arch__symbols__fixup_end(struct symbol *p, struct symbol *c);
283 int arch__compare_symbol_names(const char *namea, const char *nameb);
284 int arch__compare_symbol_names_n(const char *namea, const char *nameb,
286 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
288 enum symbol_tag_include {
289 SYMBOL_TAG_INCLUDE__NONE = 0,
290 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
293 int symbol__match_symbol_name(const char *namea, const char *nameb,
294 enum symbol_tag_include includes);
296 /* structure containing an SDT note's info */
298 char *name; /* name of the note*/
299 char *provider; /* provider name */
301 bool bit32; /* whether the location is 32 bits? */
302 union { /* location, base and semaphore addrs */
306 struct list_head note_list; /* SDT notes' list */
309 int get_sdt_note_list(struct list_head *head, const char *target);
310 int cleanup_sdt_note_list(struct list_head *sdt_notes);
311 int sdt_notes__get_count(struct list_head *start);
313 #define SDT_PROBES_SCN ".probes"
314 #define SDT_BASE_SCN ".stapsdt.base"
315 #define SDT_NOTE_SCN ".note.stapsdt"
316 #define SDT_NOTE_TYPE 3
317 #define SDT_NOTE_NAME "stapsdt"
321 SDT_NOTE_IDX_LOC = 0,
326 struct mem_info *mem_info__new(void);
327 struct mem_info *mem_info__get(struct mem_info *mi);
328 void mem_info__put(struct mem_info *mi);
330 static inline void __mem_info__zput(struct mem_info **mi)
336 #define mem_info__zput(mi) __mem_info__zput(&mi)
338 struct block_info *block_info__new(void);
339 struct block_info *block_info__get(struct block_info *bi);
340 void block_info__put(struct block_info *bi);
342 static inline void __block_info__zput(struct block_info **bi)
344 block_info__put(*bi);
348 #define block_info__zput(bi) __block_info__zput(&bi)
350 #endif /* __PERF_SYMBOL */