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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/*
27 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
28 * for newer versions we can use mmap to reduce memory usage:
29 */
30#ifdef HAVE_LIBELF_MMAP_SUPPORT
31# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
32#else
33# define PERF_ELF_C_READ_MMAP ELF_C_READ
34#endif
35
36#ifdef HAVE_LIBELF_SUPPORT
37Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
38 GElf_Shdr *shp, const char *name, size_t *idx);
39#endif
40
41#ifndef DMGL_PARAMS
42#define DMGL_NO_OPTS 0 /* For readability... */
43#define DMGL_PARAMS (1 << 0) /* Include function args */
44#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
45#endif
46
47/** struct symbol - symtab entry
48 *
49 * @ignore - resolvable but tools ignore it (e.g. idle routines)
50 */
51struct symbol {
52 struct rb_node rb_node;
53 u64 start;
54 u64 end;
55 u16 namelen;
56 u8 binding;
57 bool ignore;
58 char name[0];
59};
60
61void symbol__delete(struct symbol *sym);
62void symbols__delete(struct rb_root *symbols);
63
64/* symbols__for_each_entry - iterate over symbols (rb_root)
65 *
66 * @symbols: the rb_root of symbols
67 * @pos: the 'struct symbol *' to use as a loop cursor
68 * @nd: the 'struct rb_node *' to use as a temporary storage
69 */
70#define symbols__for_each_entry(symbols, pos, nd) \
71 for (nd = rb_first(symbols); \
72 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
73 nd = rb_next(nd))
74
75static inline size_t symbol__size(const struct symbol *sym)
76{
77 return sym->end - sym->start;
78}
79
80struct strlist;
81struct intlist;
82
83struct symbol_conf {
84 unsigned short priv_size;
85 unsigned short nr_events;
86 bool try_vmlinux_path,
87 force,
88 ignore_vmlinux,
89 ignore_vmlinux_buildid,
90 show_kernel_path,
91 use_modules,
92 allow_aliases,
93 sort_by_name,
94 show_nr_samples,
95 show_total_period,
96 use_callchain,
97 cumulate_callchain,
98 exclude_other,
99 show_cpu_utilization,
100 initialized,
101 kptr_restrict,
102 annotate_asm_raw,
103 annotate_src,
104 event_group,
105 demangle,
106 demangle_kernel,
107 filter_relative,
108 show_hist_headers,
109 branch_callstack,
110 has_filter,
111 show_ref_callgraph,
112 hide_unresolved,
113 raw_trace,
114 report_hierarchy;
115 const char *vmlinux_name,
116 *kallsyms_name,
117 *source_prefix,
118 *field_sep;
119 const char *default_guest_vmlinux_name,
120 *default_guest_kallsyms,
121 *default_guest_modules;
122 const char *guestmount;
123 const char *dso_list_str,
124 *comm_list_str,
125 *pid_list_str,
126 *tid_list_str,
127 *sym_list_str,
128 *col_width_list_str;
129 struct strlist *dso_list,
130 *comm_list,
131 *sym_list,
132 *dso_from_list,
133 *dso_to_list,
134 *sym_from_list,
135 *sym_to_list;
136 struct intlist *pid_list,
137 *tid_list;
138 const char *symfs;
139};
140
141extern struct symbol_conf symbol_conf;
142
143static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
144{
145 return path__join(bf, size, symbol_conf.symfs, path);
146}
147
148#define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
149
150extern int vmlinux_path__nr_entries;
151extern char **vmlinux_path;
152
153static inline void *symbol__priv(struct symbol *sym)
154{
155 return ((void *)sym) - symbol_conf.priv_size;
156}
157
158struct ref_reloc_sym {
159 const char *name;
160 u64 addr;
161 u64 unrelocated_addr;
162};
163
164struct map_symbol {
165 struct map *map;
166 struct symbol *sym;
167};
168
169struct addr_map_symbol {
170 struct map *map;
171 struct symbol *sym;
172 u64 addr;
173 u64 al_addr;
174};
175
176struct branch_info {
177 struct addr_map_symbol from;
178 struct addr_map_symbol to;
179 struct branch_flags flags;
180};
181
182struct mem_info {
183 struct addr_map_symbol iaddr;
184 struct addr_map_symbol daddr;
185 union perf_mem_data_src data_src;
186};
187
188struct addr_location {
189 struct machine *machine;
190 struct thread *thread;
191 struct map *map;
192 struct symbol *sym;
193 u64 addr;
194 char level;
195 u8 filtered;
196 u8 cpumode;
197 s32 cpu;
198 s32 socket;
199};
200
201struct symsrc {
202 char *name;
203 int fd;
204 enum dso_binary_type type;
205
206#ifdef HAVE_LIBELF_SUPPORT
207 Elf *elf;
208 GElf_Ehdr ehdr;
209
210 Elf_Scn *opdsec;
211 size_t opdidx;
212 GElf_Shdr opdshdr;
213
214 Elf_Scn *symtab;
215 GElf_Shdr symshdr;
216
217 Elf_Scn *dynsym;
218 size_t dynsym_idx;
219 GElf_Shdr dynshdr;
220
221 bool adjust_symbols;
222 bool is_64_bit;
223#endif
224};
225
226void symsrc__destroy(struct symsrc *ss);
227int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
228 enum dso_binary_type type);
229bool symsrc__has_symtab(struct symsrc *ss);
230bool symsrc__possibly_runtime(struct symsrc *ss);
231
232int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
233int dso__load_vmlinux(struct dso *dso, struct map *map,
234 const char *vmlinux, bool vmlinux_allocated,
235 symbol_filter_t filter);
236int dso__load_vmlinux_path(struct dso *dso, struct map *map,
237 symbol_filter_t filter);
238int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
239 symbol_filter_t filter);
240
241struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
242 u64 addr);
243struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
244 const char *name);
245struct symbol *symbol__next_by_name(struct symbol *sym);
246
247struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
248struct symbol *dso__next_symbol(struct symbol *sym);
249
250enum dso_type dso__type_fd(int fd);
251
252int filename__read_build_id(const char *filename, void *bf, size_t size);
253int sysfs__read_build_id(const char *filename, void *bf, size_t size);
254int modules__parse(const char *filename, void *arg,
255 int (*process_module)(void *arg, const char *name,
256 u64 start));
257int filename__read_debuglink(const char *filename, char *debuglink,
258 size_t size);
259
260struct perf_env;
261int symbol__init(struct perf_env *env);
262void symbol__exit(void);
263void symbol__elf_init(void);
264struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
265size_t symbol__fprintf_symname_offs(const struct symbol *sym,
266 const struct addr_location *al, FILE *fp);
267size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
268size_t symbol__fprintf(struct symbol *sym, FILE *fp);
269bool symbol_type__is_a(char symbol_type, enum map_type map_type);
270bool symbol__restricted_filename(const char *filename,
271 const char *restricted_filename);
272bool symbol__is_idle(struct symbol *sym);
273
274int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
275 struct symsrc *runtime_ss, symbol_filter_t filter,
276 int kmodule);
277int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
278 struct map *map, symbol_filter_t filter);
279
280void symbols__insert(struct rb_root *symbols, struct symbol *sym);
281void symbols__fixup_duplicate(struct rb_root *symbols);
282void symbols__fixup_end(struct rb_root *symbols);
283void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
284
285typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
286int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
287 bool *is_64_bit);
288
289#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
290
291struct kcore_extract {
292 char *kcore_filename;
293 u64 addr;
294 u64 offs;
295 u64 len;
296 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
297 int fd;
298};
299
300int kcore_extract__create(struct kcore_extract *kce);
301void kcore_extract__delete(struct kcore_extract *kce);
302
303int kcore_copy(const char *from_dir, const char *to_dir);
304int compare_proc_modules(const char *from, const char *to);
305
306int setup_list(struct strlist **list, const char *list_str,
307 const char *list_name);
308int setup_intlist(struct intlist **list, const char *list_str,
309 const char *list_name);
310
311#ifdef HAVE_LIBELF_SUPPORT
312bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
313void arch__elf_sym_adjust(GElf_Sym *sym);
314#endif
315
316#define SYMBOL_A 0
317#define SYMBOL_B 1
318
319int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
320
321#endif /* __PERF_SYMBOL */
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/*
27 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
28 * for newer versions we can use mmap to reduce memory usage:
29 */
30#ifdef HAVE_LIBELF_MMAP_SUPPORT
31# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
32#else
33# define PERF_ELF_C_READ_MMAP ELF_C_READ
34#endif
35
36#ifdef HAVE_LIBELF_SUPPORT
37Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
38 GElf_Shdr *shp, const char *name, size_t *idx);
39#endif
40
41#ifndef DMGL_PARAMS
42#define DMGL_NO_OPTS 0 /* For readability... */
43#define DMGL_PARAMS (1 << 0) /* Include function args */
44#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
45#endif
46
47#define DSO__NAME_KALLSYMS "[kernel.kallsyms]"
48#define DSO__NAME_KCORE "[kernel.kcore]"
49
50/** struct symbol - symtab entry
51 *
52 * @ignore - resolvable but tools ignore it (e.g. idle routines)
53 */
54struct symbol {
55 struct rb_node rb_node;
56 u64 start;
57 u64 end;
58 u16 namelen;
59 u8 binding;
60 u8 idle:1;
61 u8 ignore:1;
62 u8 arch_sym;
63 char name[0];
64};
65
66void symbol__delete(struct symbol *sym);
67void symbols__delete(struct rb_root *symbols);
68
69/* symbols__for_each_entry - iterate over symbols (rb_root)
70 *
71 * @symbols: the rb_root of symbols
72 * @pos: the 'struct symbol *' to use as a loop cursor
73 * @nd: the 'struct rb_node *' to use as a temporary storage
74 */
75#define symbols__for_each_entry(symbols, pos, nd) \
76 for (nd = rb_first(symbols); \
77 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
78 nd = rb_next(nd))
79
80static inline size_t symbol__size(const struct symbol *sym)
81{
82 return sym->end - sym->start;
83}
84
85struct strlist;
86struct intlist;
87
88struct symbol_conf {
89 unsigned short priv_size;
90 unsigned short nr_events;
91 bool try_vmlinux_path,
92 init_annotation,
93 force,
94 ignore_vmlinux,
95 ignore_vmlinux_buildid,
96 show_kernel_path,
97 use_modules,
98 allow_aliases,
99 sort_by_name,
100 show_nr_samples,
101 show_total_period,
102 use_callchain,
103 cumulate_callchain,
104 show_branchflag_count,
105 exclude_other,
106 show_cpu_utilization,
107 initialized,
108 kptr_restrict,
109 annotate_asm_raw,
110 annotate_src,
111 event_group,
112 demangle,
113 demangle_kernel,
114 filter_relative,
115 show_hist_headers,
116 branch_callstack,
117 has_filter,
118 show_ref_callgraph,
119 hide_unresolved,
120 raw_trace,
121 report_hierarchy;
122 const char *vmlinux_name,
123 *kallsyms_name,
124 *source_prefix,
125 *field_sep;
126 const char *default_guest_vmlinux_name,
127 *default_guest_kallsyms,
128 *default_guest_modules;
129 const char *guestmount;
130 const char *dso_list_str,
131 *comm_list_str,
132 *pid_list_str,
133 *tid_list_str,
134 *sym_list_str,
135 *col_width_list_str,
136 *bt_stop_list_str;
137 struct strlist *dso_list,
138 *comm_list,
139 *sym_list,
140 *dso_from_list,
141 *dso_to_list,
142 *sym_from_list,
143 *sym_to_list,
144 *bt_stop_list;
145 struct intlist *pid_list,
146 *tid_list;
147 const char *symfs;
148};
149
150extern struct symbol_conf symbol_conf;
151
152struct symbol_name_rb_node {
153 struct rb_node rb_node;
154 struct symbol sym;
155};
156
157static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
158{
159 return path__join(bf, size, symbol_conf.symfs, path);
160}
161
162#define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
163
164extern int vmlinux_path__nr_entries;
165extern char **vmlinux_path;
166
167static inline void *symbol__priv(struct symbol *sym)
168{
169 return ((void *)sym) - symbol_conf.priv_size;
170}
171
172struct ref_reloc_sym {
173 const char *name;
174 u64 addr;
175 u64 unrelocated_addr;
176};
177
178struct map_symbol {
179 struct map *map;
180 struct symbol *sym;
181};
182
183struct addr_map_symbol {
184 struct map *map;
185 struct symbol *sym;
186 u64 addr;
187 u64 al_addr;
188};
189
190struct branch_info {
191 struct addr_map_symbol from;
192 struct addr_map_symbol to;
193 struct branch_flags flags;
194 char *srcline_from;
195 char *srcline_to;
196};
197
198struct mem_info {
199 struct addr_map_symbol iaddr;
200 struct addr_map_symbol daddr;
201 union perf_mem_data_src data_src;
202};
203
204struct addr_location {
205 struct machine *machine;
206 struct thread *thread;
207 struct map *map;
208 struct symbol *sym;
209 u64 addr;
210 char level;
211 u8 filtered;
212 u8 cpumode;
213 s32 cpu;
214 s32 socket;
215};
216
217struct symsrc {
218 char *name;
219 int fd;
220 enum dso_binary_type type;
221
222#ifdef HAVE_LIBELF_SUPPORT
223 Elf *elf;
224 GElf_Ehdr ehdr;
225
226 Elf_Scn *opdsec;
227 size_t opdidx;
228 GElf_Shdr opdshdr;
229
230 Elf_Scn *symtab;
231 GElf_Shdr symshdr;
232
233 Elf_Scn *dynsym;
234 size_t dynsym_idx;
235 GElf_Shdr dynshdr;
236
237 bool adjust_symbols;
238 bool is_64_bit;
239#endif
240};
241
242void symsrc__destroy(struct symsrc *ss);
243int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
244 enum dso_binary_type type);
245bool symsrc__has_symtab(struct symsrc *ss);
246bool symsrc__possibly_runtime(struct symsrc *ss);
247
248int dso__load(struct dso *dso, struct map *map);
249int dso__load_vmlinux(struct dso *dso, struct map *map,
250 const char *vmlinux, bool vmlinux_allocated);
251int dso__load_vmlinux_path(struct dso *dso, struct map *map);
252int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
253 bool no_kcore);
254int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
255
256void dso__insert_symbol(struct dso *dso, enum map_type type,
257 struct symbol *sym);
258
259struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
260 u64 addr);
261struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
262 const char *name);
263struct symbol *symbol__next_by_name(struct symbol *sym);
264
265struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
266struct symbol *dso__last_symbol(struct dso *dso, enum map_type type);
267struct symbol *dso__next_symbol(struct symbol *sym);
268
269enum dso_type dso__type_fd(int fd);
270
271int filename__read_build_id(const char *filename, void *bf, size_t size);
272int sysfs__read_build_id(const char *filename, void *bf, size_t size);
273int modules__parse(const char *filename, void *arg,
274 int (*process_module)(void *arg, const char *name,
275 u64 start));
276int filename__read_debuglink(const char *filename, char *debuglink,
277 size_t size);
278
279struct perf_env;
280int symbol__init(struct perf_env *env);
281void symbol__exit(void);
282void symbol__elf_init(void);
283int symbol__annotation_init(void);
284
285struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
286size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
287 const struct addr_location *al,
288 bool unknown_as_addr,
289 bool print_offsets, FILE *fp);
290size_t symbol__fprintf_symname_offs(const struct symbol *sym,
291 const struct addr_location *al, FILE *fp);
292size_t __symbol__fprintf_symname(const struct symbol *sym,
293 const struct addr_location *al,
294 bool unknown_as_addr, FILE *fp);
295size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
296size_t symbol__fprintf(struct symbol *sym, FILE *fp);
297bool symbol_type__is_a(char symbol_type, enum map_type map_type);
298bool symbol__restricted_filename(const char *filename,
299 const char *restricted_filename);
300int symbol__config_symfs(const struct option *opt __maybe_unused,
301 const char *dir, int unset __maybe_unused);
302
303int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
304 struct symsrc *runtime_ss, int kmodule);
305int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
306 struct map *map);
307
308void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel);
309void symbols__insert(struct rb_root *symbols, struct symbol *sym);
310void symbols__fixup_duplicate(struct rb_root *symbols);
311void symbols__fixup_end(struct rb_root *symbols);
312void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
313
314typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
315int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
316 bool *is_64_bit);
317
318#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
319
320struct kcore_extract {
321 char *kcore_filename;
322 u64 addr;
323 u64 offs;
324 u64 len;
325 char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
326 int fd;
327};
328
329int kcore_extract__create(struct kcore_extract *kce);
330void kcore_extract__delete(struct kcore_extract *kce);
331
332int kcore_copy(const char *from_dir, const char *to_dir);
333int compare_proc_modules(const char *from, const char *to);
334
335int setup_list(struct strlist **list, const char *list_str,
336 const char *list_name);
337int setup_intlist(struct intlist **list, const char *list_str,
338 const char *list_name);
339
340#ifdef HAVE_LIBELF_SUPPORT
341bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
342void arch__sym_update(struct symbol *s, GElf_Sym *sym);
343#endif
344
345#define SYMBOL_A 0
346#define SYMBOL_B 1
347
348int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);
349
350/* structure containing an SDT note's info */
351struct sdt_note {
352 char *name; /* name of the note*/
353 char *provider; /* provider name */
354 bool bit32; /* whether the location is 32 bits? */
355 union { /* location, base and semaphore addrs */
356 Elf64_Addr a64[3];
357 Elf32_Addr a32[3];
358 } addr;
359 struct list_head note_list; /* SDT notes' list */
360};
361
362int get_sdt_note_list(struct list_head *head, const char *target);
363int cleanup_sdt_note_list(struct list_head *sdt_notes);
364int sdt_notes__get_count(struct list_head *start);
365
366#define SDT_BASE_SCN ".stapsdt.base"
367#define SDT_NOTE_SCN ".note.stapsdt"
368#define SDT_NOTE_TYPE 3
369#define SDT_NOTE_NAME "stapsdt"
370#define NR_ADDR 3
371
372#endif /* __PERF_SYMBOL */