1 #ifndef __PERF_SYMBOL
2 #define __PERF_SYMBOL 1
3
4 #include <linux/types.h>
5 #include <stdbool.h>
6 #include <stdint.h>
7 #include "map.h"
8 #include "../perf.h"
9 #include <linux/list.h>
10 #include <linux/rbtree.h>
11 #include <stdio.h>
12 #include <byteswap.h>
13 #include <libgen.h>
14 #include "build-id.h"
15 #include "event.h"
16 #include "util.h"
17
18 #ifdef HAVE_LIBELF_SUPPORT
19 #include <libelf.h>
20 #include <gelf.h>
21 #endif
22 #include <elf.h>
23
24 #include "dso.h"
25
26 #ifdef HAVE_CPLUS_DEMANGLE_SUPPORT
27 extern char *cplus_demangle(const char *, int);
28
bfd_demangle(void __maybe_unused * v,const char * c,int i)29 static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i)
30 {
31 return cplus_demangle(c, i);
32 }
33 #else
34 #ifdef NO_DEMANGLE
bfd_demangle(void __maybe_unused * v,const char __maybe_unused * c,int __maybe_unused i)35 static inline char *bfd_demangle(void __maybe_unused *v,
36 const char __maybe_unused *c,
37 int __maybe_unused i)
38 {
39 return NULL;
40 }
41 #else
42 #define PACKAGE 'perf'
43 #include <bfd.h>
44 #endif
45 #endif
46
47 /*
48 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
49 * for newer versions we can use mmap to reduce memory usage:
50 */
51 #ifdef HAVE_LIBELF_MMAP_SUPPORT
52 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
53 #else
54 # define PERF_ELF_C_READ_MMAP ELF_C_READ
55 #endif
56
57 #ifdef HAVE_LIBELF_SUPPORT
58 extern Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
59 GElf_Shdr *shp, const char *name, size_t *idx);
60 #endif
61
62 #ifndef DMGL_PARAMS
63 #define DMGL_NO_OPTS 0 /* For readability... */
64 #define DMGL_PARAMS (1 << 0) /* Include function args */
65 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
66 #endif
67
68 /** struct symbol - symtab entry
69 *
70 * @ignore - resolvable but tools ignore it (e.g. idle routines)
71 */
72 struct symbol {
73 struct rb_node rb_node;
74 u64 start;
75 u64 end;
76 u16 namelen;
77 u8 binding;
78 bool ignore;
79 char name[0];
80 };
81
82 void symbol__delete(struct symbol *sym);
83 void symbols__delete(struct rb_root *symbols);
84
85 /* symbols__for_each_entry - iterate over symbols (rb_root)
86 *
87 * @symbols: the rb_root of symbols
88 * @pos: the 'struct symbol *' to use as a loop cursor
89 * @nd: the 'struct rb_node *' to use as a temporary storage
90 */
91 #define symbols__for_each_entry(symbols, pos, nd) \
92 for (nd = rb_first(symbols); \
93 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
94 nd = rb_next(nd))
95
symbol__size(const struct symbol * sym)96 static inline size_t symbol__size(const struct symbol *sym)
97 {
98 return sym->end - sym->start;
99 }
100
101 struct strlist;
102
103 struct symbol_conf {
104 unsigned short priv_size;
105 unsigned short nr_events;
106 bool try_vmlinux_path,
107 ignore_vmlinux,
108 show_kernel_path,
109 use_modules,
110 sort_by_name,
111 show_nr_samples,
112 show_total_period,
113 use_callchain,
114 cumulate_callchain,
115 exclude_other,
116 show_cpu_utilization,
117 initialized,
118 kptr_restrict,
119 annotate_asm_raw,
120 annotate_src,
121 event_group,
122 demangle,
123 demangle_kernel,
124 filter_relative,
125 show_hist_headers;
126 const char *vmlinux_name,
127 *kallsyms_name,
128 *source_prefix,
129 *field_sep;
130 const char *default_guest_vmlinux_name,
131 *default_guest_kallsyms,
132 *default_guest_modules;
133 const char *guestmount;
134 const char *dso_list_str,
135 *comm_list_str,
136 *sym_list_str,
137 *col_width_list_str;
138 struct strlist *dso_list,
139 *comm_list,
140 *sym_list,
141 *dso_from_list,
142 *dso_to_list,
143 *sym_from_list,
144 *sym_to_list;
145 const char *symfs;
146 };
147
148 extern struct symbol_conf symbol_conf;
149
__symbol__join_symfs(char * bf,size_t size,const char * path)150 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
151 {
152 return path__join(bf, size, symbol_conf.symfs, path);
153 }
154
155 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
156
157 extern int vmlinux_path__nr_entries;
158 extern char **vmlinux_path;
159
symbol__priv(struct symbol * sym)160 static inline void *symbol__priv(struct symbol *sym)
161 {
162 return ((void *)sym) - symbol_conf.priv_size;
163 }
164
165 struct ref_reloc_sym {
166 const char *name;
167 u64 addr;
168 u64 unrelocated_addr;
169 };
170
171 struct map_symbol {
172 struct map *map;
173 struct symbol *sym;
174 bool unfolded;
175 bool has_children;
176 };
177
178 struct addr_map_symbol {
179 struct map *map;
180 struct symbol *sym;
181 u64 addr;
182 u64 al_addr;
183 };
184
185 struct branch_info {
186 struct addr_map_symbol from;
187 struct addr_map_symbol to;
188 struct branch_flags flags;
189 };
190
191 struct mem_info {
192 struct addr_map_symbol iaddr;
193 struct addr_map_symbol daddr;
194 union perf_mem_data_src data_src;
195 };
196
197 struct addr_location {
198 struct machine *machine;
199 struct thread *thread;
200 struct map *map;
201 struct symbol *sym;
202 u64 addr;
203 char level;
204 u8 filtered;
205 u8 cpumode;
206 s32 cpu;
207 };
208
209 struct symsrc {
210 char *name;
211 int fd;
212 enum dso_binary_type type;
213
214 #ifdef HAVE_LIBELF_SUPPORT
215 Elf *elf;
216 GElf_Ehdr ehdr;
217
218 Elf_Scn *opdsec;
219 size_t opdidx;
220 GElf_Shdr opdshdr;
221
222 Elf_Scn *symtab;
223 GElf_Shdr symshdr;
224
225 Elf_Scn *dynsym;
226 size_t dynsym_idx;
227 GElf_Shdr dynshdr;
228
229 bool adjust_symbols;
230 bool is_64_bit;
231 #endif
232 };
233
234 void symsrc__destroy(struct symsrc *ss);
235 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
236 enum dso_binary_type type);
237 bool symsrc__has_symtab(struct symsrc *ss);
238 bool symsrc__possibly_runtime(struct symsrc *ss);
239
240 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
241 int dso__load_vmlinux(struct dso *dso, struct map *map,
242 const char *vmlinux, bool vmlinux_allocated,
243 symbol_filter_t filter);
244 int dso__load_vmlinux_path(struct dso *dso, struct map *map,
245 symbol_filter_t filter);
246 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
247 symbol_filter_t filter);
248
249 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
250 u64 addr);
251 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
252 const char *name);
253
254 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
255 struct symbol *dso__next_symbol(struct symbol *sym);
256
257 enum dso_type dso__type_fd(int fd);
258
259 int filename__read_build_id(const char *filename, void *bf, size_t size);
260 int sysfs__read_build_id(const char *filename, void *bf, size_t size);
261 int modules__parse(const char *filename, void *arg,
262 int (*process_module)(void *arg, const char *name,
263 u64 start));
264 int filename__read_debuglink(const char *filename, char *debuglink,
265 size_t size);
266
267 struct perf_session_env;
268 int symbol__init(struct perf_session_env *env);
269 void symbol__exit(void);
270 void symbol__elf_init(void);
271 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
272 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
273 const struct addr_location *al, FILE *fp);
274 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
275 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
276 bool symbol_type__is_a(char symbol_type, enum map_type map_type);
277 bool symbol__restricted_filename(const char *filename,
278 const char *restricted_filename);
279 bool symbol__is_idle(struct symbol *sym);
280
281 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
282 struct symsrc *runtime_ss, symbol_filter_t filter,
283 int kmodule);
284 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
285 struct map *map, symbol_filter_t filter);
286
287 void symbols__insert(struct rb_root *symbols, struct symbol *sym);
288 void symbols__fixup_duplicate(struct rb_root *symbols);
289 void symbols__fixup_end(struct rb_root *symbols);
290 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
291
292 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
293 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
294 bool *is_64_bit);
295
296 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
297
298 struct kcore_extract {
299 char *kcore_filename;
300 u64 addr;
301 u64 offs;
302 u64 len;
303 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
304 int fd;
305 };
306
307 int kcore_extract__create(struct kcore_extract *kce);
308 void kcore_extract__delete(struct kcore_extract *kce);
309
310 int kcore_copy(const char *from_dir, const char *to_dir);
311 int compare_proc_modules(const char *from, const char *to);
312
313 int setup_list(struct strlist **list, const char *list_str,
314 const char *list_name);
315
316 #endif /* __PERF_SYMBOL */
317