summaryrefslogtreecommitdiff
path: root/tools/perf/util/symbol.h
blob: 0563f33c1eb30802a8b609f4612059e099b675c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_SYMBOL
#define __PERF_SYMBOL 1

#include <linux/types.h>
#include <stdbool.h>
#include <stdint.h>
#include "map.h"
#include "../perf.h"
#include <linux/list.h>
#include <linux/rbtree.h>
#include <stdio.h>
#include <byteswap.h>
#include <libgen.h>
#include "build-id.h"
#include "event.h"
#include "path.h"

#ifdef HAVE_LIBELF_SUPPORT
#include <libelf.h>
#include <gelf.h>
#endif
#include <elf.h>

#include "dso.h"

/*
 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
 * for newer versions we can use mmap to reduce memory usage:
 */
#ifdef HAVE_LIBELF_MMAP_SUPPORT
# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
#else
# define PERF_ELF_C_READ_MMAP ELF_C_READ
#endif

#ifdef HAVE_LIBELF_SUPPORT
Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
			     GElf_Shdr *shp, const char *name, size_t *idx);
#endif

#ifndef DMGL_PARAMS
#define DMGL_NO_OPTS     0              /* For readability... */
#define DMGL_PARAMS      (1 << 0)       /* Include function args */
#define DMGL_ANSI        (1 << 1)       /* Include const, volatile, etc */
#endif

#define DSO__NAME_KALLSYMS	"[kernel.kallsyms]"
#define DSO__NAME_KCORE		"[kernel.kcore]"

/** struct symbol - symtab entry
 *
 * @ignore - resolvable but tools ignore it (e.g. idle routines)
 */
struct symbol {
	struct rb_node	rb_node;
	u64		start;
	u64		end;
	u16		namelen;
	u8		binding;
	u8		idle:1;
	u8		ignore:1;
	u8		inlined:1;
	u8		arch_sym;
	char		name[0];
};

void symbol__delete(struct symbol *sym);
void symbols__delete(struct rb_root *symbols);

/* symbols__for_each_entry - iterate over symbols (rb_root)
 *
 * @symbols: the rb_root of symbols
 * @pos: the 'struct symbol *' to use as a loop cursor
 * @nd: the 'struct rb_node *' to use as a temporary storage
 */
#define symbols__for_each_entry(symbols, pos, nd)			\
	for (nd = rb_first(symbols);					\
	     nd && (pos = rb_entry(nd, struct symbol, rb_node));	\
	     nd = rb_next(nd))

static inline size_t symbol__size(const struct symbol *sym)
{
	return sym->end - sym->start;
}

struct strlist;
struct intlist;

struct symbol_conf {
	unsigned short	priv_size;
	unsigned short	nr_events;
	bool		try_vmlinux_path,
			init_annotation,
			force,
			ignore_vmlinux,
			ignore_vmlinux_buildid,
			show_kernel_path,
			use_modules,
			allow_aliases,
			sort_by_name,
			show_nr_samples,
			show_total_period,
			use_callchain,
			cumulate_callchain,
			show_branchflag_count,
			exclude_other,
			show_cpu_utilization,
			initialized,
			kptr_restrict,
			annotate_asm_raw,
			annotate_src,
			event_group,
			demangle,
			demangle_kernel,
			filter_relative,
			show_hist_headers,
			branch_callstack,
			has_filter,
			show_ref_callgraph,
			hide_unresolved,
			raw_trace,
			report_hierarchy,
			inline_name;
	const char	*vmlinux_name,
			*kallsyms_name,
			*source_prefix,
			*field_sep;
	const char	*default_guest_vmlinux_name,
			*default_guest_kallsyms,
			*default_guest_modules;
	const char	*guestmount;
	const char	*dso_list_str,
			*comm_list_str,
			*pid_list_str,
			*tid_list_str,
			*sym_list_str,
			*col_width_list_str,
			*bt_stop_list_str;
       struct strlist	*dso_list,
			*comm_list,
			*sym_list,
			*dso_from_list,
			*dso_to_list,
			*sym_from_list,
			*sym_to_list,
			*bt_stop_list;
	struct intlist	*pid_list,
			*tid_list;
	const char	*symfs;
};

extern struct symbol_conf symbol_conf;

struct symbol_name_rb_node {
	struct rb_node	rb_node;
	struct symbol	sym;
};

static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
{
	return path__join(bf, size, symbol_conf.symfs, path);
}

#define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)

extern int vmlinux_path__nr_entries;
extern char **vmlinux_path;

static inline void *symbol__priv(struct symbol *sym)
{
	return ((void *)sym) - symbol_conf.priv_size;
}

struct ref_reloc_sym {
	const char	*name;
	u64		addr;
	u64		unrelocated_addr;
};

struct map_symbol {
	struct map    *map;
	struct symbol *sym;
};

struct addr_map_symbol {
	struct map    *map;
	struct symbol *sym;
	u64	      addr;
	u64	      al_addr;
	u64	      phys_addr;
};

struct branch_info {
	struct addr_map_symbol from;
	struct addr_map_symbol to;
	struct branch_flags flags;
	char			*srcline_from;
	char			*srcline_to;
};

struct mem_info {
	struct addr_map_symbol iaddr;
	struct addr_map_symbol daddr;
	union perf_mem_data_src data_src;
};

struct addr_location {
	struct machine *machine;
	struct thread *thread;
	struct map    *map;
	struct symbol *sym;
	const char    *srcline;
	u64	      addr;
	char	      level;
	u8	      filtered;
	u8	      cpumode;
	s32	      cpu;
	s32	      socket;
};

struct symsrc {
	char *name;
	int fd;
	enum dso_binary_type type;

#ifdef HAVE_LIBELF_SUPPORT
	Elf *elf;
	GElf_Ehdr ehdr;

	Elf_Scn *opdsec;
	size_t opdidx;
	GElf_Shdr opdshdr;

	Elf_Scn *symtab;
	GElf_Shdr symshdr;

	Elf_Scn *dynsym;
	size_t dynsym_idx;
	GElf_Shdr dynshdr;

	bool adjust_symbols;
	bool is_64_bit;
#endif
};

void symsrc__destroy(struct symsrc *ss);
int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
		 enum dso_binary_type type);
bool symsrc__has_symtab(struct symsrc *ss);
bool symsrc__possibly_runtime(struct symsrc *ss);

int dso__load(struct dso *dso, struct map *map);
int dso__load_vmlinux(struct dso *dso, struct map *map,
		      const char *vmlinux, bool vmlinux_allocated);
int dso__load_vmlinux_path(struct dso *dso, struct map *map);
int __dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
			 bool no_kcore);
int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);

void dso__insert_symbol(struct dso *dso, enum map_type type,
			struct symbol *sym);

struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
				u64 addr);
struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
					const char *name);
struct symbol *symbol__next_by_name(struct symbol *sym);

struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
struct symbol *dso__last_symbol(struct dso *dso, enum map_type type);
struct symbol *dso__next_symbol(struct symbol *sym);

enum dso_type dso__type_fd(int fd);

int filename__read_build_id(const char *filename, void *bf, size_t size);
int sysfs__read_build_id(const char *filename, void *bf, size_t size);
int modules__parse(const char *filename, void *arg,
		   int (*process_module)(void *arg, const char *name,
					 u64 start, u64 size));
int filename__read_debuglink(const char *filename, char *debuglink,
			     size_t size);

struct perf_env;
int symbol__init(struct perf_env *env);
void symbol__exit(void);
void symbol__elf_init(void);
int symbol__annotation_init(void);

struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
size_t __symbol__fprintf_symname_offs(const struct symbol *sym,
				      const struct addr_location *al,
				      bool unknown_as_addr,
				      bool print_offsets, FILE *fp);
size_t symbol__fprintf_symname_offs(const struct symbol *sym,
				    const struct addr_location *al, FILE *fp);
size_t __symbol__fprintf_symname(const struct symbol *sym,
				 const struct addr_location *al,
				 bool unknown_as_addr, FILE *fp);
size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
size_t symbol__fprintf(struct symbol *sym, FILE *fp);
bool symbol_type__is_a(char symbol_type, enum map_type map_type);
bool symbol__restricted_filename(const char *filename,
				 const char *restricted_filename);
int symbol__config_symfs(const struct option *opt __maybe_unused,
			 const char *dir, int unset __maybe_unused);

int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
		  struct symsrc *runtime_ss, int kmodule);
int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
				struct map *map);

char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);

void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel);
void symbols__insert(struct rb_root *symbols, struct symbol *sym);
void symbols__fixup_duplicate(struct rb_root *symbols);
void symbols__fixup_end(struct rb_root *symbols);
void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);

typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
		    bool *is_64_bit);

#define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"

struct kcore_extract {
	char *kcore_filename;
	u64 addr;
	u64 offs;
	u64 len;
	char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
	int fd;
};

int kcore_extract__create(struct kcore_extract *kce);
void kcore_extract__delete(struct kcore_extract *kce);

int kcore_copy(const char *from_dir, const char *to_dir);
int compare_proc_modules(const char *from, const char *to);

int setup_list(struct strlist **list, const char *list_str,
	       const char *list_name);
int setup_intlist(struct intlist **list, const char *list_str,
		  const char *list_name);

#ifdef HAVE_LIBELF_SUPPORT
bool elf__needs_adjust_symbols(GElf_Ehdr ehdr);
void arch__sym_update(struct symbol *s, GElf_Sym *sym);
#endif

const char *arch__normalize_symbol_name(const char *name);
#define SYMBOL_A 0
#define SYMBOL_B 1

int arch__compare_symbol_names(const char *namea, const char *nameb);
int arch__compare_symbol_names_n(const char *namea, const char *nameb,
				 unsigned int n);
int arch__choose_best_symbol(struct symbol *syma, struct symbol *symb);

enum symbol_tag_include {
	SYMBOL_TAG_INCLUDE__NONE = 0,
	SYMBOL_TAG_INCLUDE__DEFAULT_ONLY
};

int symbol__match_symbol_name(const char *namea, const char *nameb,
			      enum symbol_tag_include includes);

/* structure containing an SDT note's info */
struct sdt_note {
	char *name;			/* name of the note*/
	char *provider;			/* provider name */
	char *args;
	bool bit32;			/* whether the location is 32 bits? */
	union {				/* location, base and semaphore addrs */
		Elf64_Addr a64[3];
		Elf32_Addr a32[3];
	} addr;
	struct list_head note_list;	/* SDT notes' list */
};

int get_sdt_note_list(struct list_head *head, const char *target);
int cleanup_sdt_note_list(struct list_head *sdt_notes);
int sdt_notes__get_count(struct list_head *start);

#define SDT_BASE_SCN ".stapsdt.base"
#define SDT_NOTE_SCN  ".note.stapsdt"
#define SDT_NOTE_TYPE 3
#define SDT_NOTE_NAME "stapsdt"
#define NR_ADDR 3

#endif /* __PERF_SYMBOL */