1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PERF_SYMBOL
3 #define __PERF_SYMBOL 1
4
5 #include <linux/types.h>
6 #include <linux/refcount.h>
7 #include <stdbool.h>
8 #include <stdint.h>
9 #include <linux/list.h>
10 #include <linux/rbtree.h>
11 #include <stdio.h>
12 #include "path.h"
13 #include "symbol_conf.h"
14 #include "spark.h"
15
16 #ifdef HAVE_LIBELF_SUPPORT
17 #include <libelf.h>
18 #include <gelf.h>
19 #endif
20 #include <elf.h>
21
22 struct dso;
23 struct map;
24 struct maps;
25 struct option;
26 struct build_id;
27
28 /*
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:
31 */
32 #ifdef ELF_C_READ_MMAP
33 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
34 #else
35 # define PERF_ELF_C_READ_MMAP ELF_C_READ
36 #endif
37
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);
41 #endif
42
43 /** struct symbol - symtab entry
44 *
45 * @ignore - resolvable but tools ignore it (e.g. idle routines)
46 */
47 struct symbol {
48 struct rb_node rb_node;
49 u64 start;
50 u64 end;
51 u16 namelen;
52 u8 type:4;
53 u8 binding:4;
54 u8 idle:1;
55 u8 ignore:1;
56 u8 inlined:1;
57 u8 arch_sym;
58 bool annotate2;
59 char name[];
60 };
61
62 void symbol__delete(struct symbol *sym);
63 void symbols__delete(struct rb_root_cached *symbols);
64
65 /* symbols__for_each_entry - iterate over symbols (rb_root)
66 *
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
70 */
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)); \
74 nd = rb_next(nd))
75
symbol__size(const struct symbol * sym)76 static inline size_t symbol__size(const struct symbol *sym)
77 {
78 return sym->end - sym->start;
79 }
80
81 struct strlist;
82 struct intlist;
83
84 struct symbol_name_rb_node {
85 struct rb_node rb_node;
86 struct symbol sym;
87 };
88
__symbol__join_symfs(char * bf,size_t size,const char * path)89 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
90 {
91 return path__join(bf, size, symbol_conf.symfs, path);
92 }
93
94 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
95
96 extern int vmlinux_path__nr_entries;
97 extern char **vmlinux_path;
98
symbol__priv(struct symbol * sym)99 static inline void *symbol__priv(struct symbol *sym)
100 {
101 return ((void *)sym) - symbol_conf.priv_size;
102 }
103
104 struct ref_reloc_sym {
105 const char *name;
106 u64 addr;
107 u64 unrelocated_addr;
108 };
109
110 struct addr_location {
111 struct thread *thread;
112 struct maps *maps;
113 struct map *map;
114 struct symbol *sym;
115 const char *srcline;
116 u64 addr;
117 char level;
118 u8 filtered;
119 u8 cpumode;
120 s32 cpu;
121 s32 socket;
122 };
123
124 int dso__load(struct dso *dso, struct map *map);
125 int dso__load_vmlinux(struct dso *dso, struct map *map,
126 const char *vmlinux, bool vmlinux_allocated);
127 int dso__load_vmlinux_path(struct dso *dso, struct map *map);
128 int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
129 bool no_kcore);
130 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
131
132 void dso__insert_symbol(struct dso *dso,
133 struct symbol *sym);
134 void dso__delete_symbol(struct dso *dso,
135 struct symbol *sym);
136
137 struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
138 struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name);
139
140 struct symbol *symbol__next_by_name(struct symbol *sym);
141
142 struct symbol *dso__first_symbol(struct dso *dso);
143 struct symbol *dso__last_symbol(struct dso *dso);
144 struct symbol *dso__next_symbol(struct symbol *sym);
145
146 enum dso_type dso__type_fd(int fd);
147
148 int filename__read_build_id(const char *filename, struct build_id *id);
149 int sysfs__read_build_id(const char *filename, struct build_id *bid);
150 int modules__parse(const char *filename, void *arg,
151 int (*process_module)(void *arg, const char *name,
152 u64 start, u64 size));
153 int filename__read_debuglink(const char *filename, char *debuglink,
154 size_t size);
155
156 struct perf_env;
157 int symbol__init(struct perf_env *env);
158 void symbol__exit(void);
159 void symbol__elf_init(void);
160 int symbol__annotation_init(void);
161
162 struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name);
163 size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
164 const struct addr_location *al,
165 bool unknown_as_addr,
166 bool print_offsets, FILE *fp);
167 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
168 const struct addr_location *al, FILE *fp);
169 size_t __symbol__fprintf_symname(const struct symbol *sym,
170 const struct addr_location *al,
171 bool unknown_as_addr, FILE *fp);
172 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
173 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
174 bool symbol__restricted_filename(const char *filename,
175 const char *restricted_filename);
176 int symbol__config_symfs(const struct option *opt __maybe_unused,
177 const char *dir, int unset __maybe_unused);
178
179 struct symsrc;
180
181 #ifdef HAVE_LIBBFD_SUPPORT
182 int dso__load_bfd_symbols(struct dso *dso, const char *debugfile);
183 #endif
184
185 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
186 struct symsrc *runtime_ss, int kmodule);
187 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
188
189 char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
190
191 void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
192 bool kernel);
193 void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
194 void symbols__fixup_duplicate(struct rb_root_cached *symbols);
195 void symbols__fixup_end(struct rb_root_cached *symbols);
196 void maps__fixup_end(struct maps *maps);
197
198 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
199 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
200 bool *is_64_bit);
201
202 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
203
204 struct kcore_extract {
205 char *kcore_filename;
206 u64 addr;
207 u64 offs;
208 u64 len;
209 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
210 int fd;
211 };
212
213 int kcore_extract__create(struct kcore_extract *kce);
214 void kcore_extract__delete(struct kcore_extract *kce);
215
216 int kcore_copy(const char *from_dir, const char *to_dir);
217 int compare_proc_modules(const char *from, const char *to);
218
219 int setup_list(struct strlist **list, const char *list_str,
220 const char *list_name);
221 int setup_intlist(struct intlist **list, const char *list_str,
222 const char *list_name);
223
224 #ifdef HAVE_LIBELF_SUPPORT
225 bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
226 void arch__sym_update(struct symbol *s, GElf_Sym *sym);
227 #endif
228
229 const char *arch__normalize_symbol_name(const char *name);
230 #define SYMBOL_A 0
231 #define SYMBOL_B 1
232
233 void arch__symbols__fixup_end(struct symbol *p, struct symbol *c);
234 int arch__compare_symbol_names(const char *namea, const char *nameb);
235 int arch__compare_symbol_names_n(const char *namea, const char *nameb,
236 unsigned int n);
237 int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
238
239 enum symbol_tag_include {
240 SYMBOL_TAG_INCLUDE__NONE = 0,
241 SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
242 };
243
244 int symbol__match_symbol_name(const char *namea, const char *nameb,
245 enum symbol_tag_include includes);
246
247 /* structure containing an SDT note's info */
248 struct sdt_note {
249 char *name; /* name of the note*/
250 char *provider; /* provider name */
251 char *args;
252 bool bit32; /* whether the location is 32 bits? */
253 union { /* location, base and semaphore addrs */
254 Elf64_Addr a64[3];
255 Elf32_Addr a32[3];
256 } addr;
257 struct list_head note_list; /* SDT notes' list */
258 };
259
260 int get_sdt_note_list(struct list_head *head, const char *target);
261 int cleanup_sdt_note_list(struct list_head *sdt_notes);
262 int sdt_notes__get_count(struct list_head *start);
263
264 #define SDT_PROBES_SCN ".probes"
265 #define SDT_BASE_SCN ".stapsdt.base"
266 #define SDT_NOTE_SCN ".note.stapsdt"
267 #define SDT_NOTE_TYPE 3
268 #define SDT_NOTE_NAME "stapsdt"
269 #define NR_ADDR 3
270
271 enum {
272 SDT_NOTE_IDX_LOC = 0,
273 SDT_NOTE_IDX_BASE,
274 SDT_NOTE_IDX_REFCTR,
275 };
276
277 struct mem_info *mem_info__new(void);
278 struct mem_info *mem_info__get(struct mem_info *mi);
279 void mem_info__put(struct mem_info *mi);
280
__mem_info__zput(struct mem_info ** mi)281 static inline void __mem_info__zput(struct mem_info **mi)
282 {
283 mem_info__put(*mi);
284 *mi = NULL;
285 }
286
287 #define mem_info__zput(mi) __mem_info__zput(&mi)
288
289 #endif /* __PERF_SYMBOL */
290
