aboutsummaryrefslogtreecommitdiff
path: root/tools/perf/util/symbol.h
blob: 4ff45e30c72674583db9f63fb4c8116153b9cba2 (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
#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>

#ifndef NO_LIBELF_SUPPORT
#include <libelf.h>
#include <gelf.h>
#include <elf.h>
#endif

#ifdef HAVE_CPLUS_DEMANGLE
extern char *cplus_demangle(const char *, int);

static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i)
{
	return cplus_demangle(c, i);
}
#else
#ifdef NO_DEMANGLE
static inline char *bfd_demangle(void __maybe_unused *v,
				 const char __maybe_unused *c,
				 int __maybe_unused i)
{
	return NULL;
}
#else
#include <bfd.h>
#endif
#endif

int hex2u64(const char *ptr, u64 *val);
char *strxfrchar(char *s, char from, char to);

/*
 * 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 LIBELF_NO_MMAP
# define PERF_ELF_C_READ_MMAP ELF_C_READ
#else
# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
#endif

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

#define BUILD_ID_SIZE 20

/** 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;
	bool		ignore;
	char		name[0];
};

void symbol__delete(struct symbol *sym);

static inline size_t symbol__size(const struct symbol *sym)
{
	return sym->end - sym->start + 1;
}

struct strlist;

struct symbol_conf {
	unsigned short	priv_size;
	unsigned short	nr_events;
	bool		try_vmlinux_path,
			show_kernel_path,
			use_modules,
			sort_by_name,
			show_nr_samples,
			show_total_period,
			use_callchain,
			exclude_other,
			show_cpu_utilization,
			initialized,
			kptr_restrict,
			annotate_asm_raw,
			annotate_src;
	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,
			*sym_list_str,
			*col_width_list_str;
       struct strlist	*dso_list,
			*comm_list,
			*sym_list,
			*dso_from_list,
			*dso_to_list,
			*sym_from_list,
			*sym_to_list;
	const char	*symfs;
};

extern struct symbol_conf symbol_conf;

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;
	bool	      unfolded;
	bool	      has_children;
};

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

struct branch_info {
	struct addr_map_symbol from;
	struct addr_map_symbol to;
	struct branch_flags flags;
};

struct addr_location {
	struct thread *thread;
	struct map    *map;
	struct symbol *sym;
	u64	      addr;
	char	      level;
	bool	      filtered;
	u8	      cpumode;
	s32	      cpu;
};

enum dso_binary_type {
	DSO_BINARY_TYPE__KALLSYMS = 0,
	DSO_BINARY_TYPE__GUEST_KALLSYMS,
	DSO_BINARY_TYPE__VMLINUX,
	DSO_BINARY_TYPE__GUEST_VMLINUX,
	DSO_BINARY_TYPE__JAVA_JIT,
	DSO_BINARY_TYPE__DEBUGLINK,
	DSO_BINARY_TYPE__BUILD_ID_CACHE,
	DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
	DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
	DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
	DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
	DSO_BINARY_TYPE__GUEST_KMODULE,
	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
	DSO_BINARY_TYPE__NOT_FOUND,
};

enum dso_kernel_type {
	DSO_TYPE_USER = 0,
	DSO_TYPE_KERNEL,
	DSO_TYPE_GUEST_KERNEL
};

enum dso_swap_type {
	DSO_SWAP__UNSET,
	DSO_SWAP__NO,
	DSO_SWAP__YES,
};

#define DSO__DATA_CACHE_SIZE 4096
#define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)

struct dso_cache {
	struct rb_node	rb_node;
	u64 offset;
	u64 size;
	char data[0];
};

struct dso {
	struct list_head node;
	struct rb_root	 symbols[MAP__NR_TYPES];
	struct rb_root	 symbol_names[MAP__NR_TYPES];
	struct rb_root	 cache;
	enum dso_kernel_type	kernel;
	enum dso_swap_type	needs_swap;
	enum dso_binary_type	symtab_type;
	enum dso_binary_type	data_type;
	u8		 adjust_symbols:1;
	u8		 has_build_id:1;
	u8		 hit:1;
	u8		 annotate_warned:1;
	u8		 sname_alloc:1;
	u8		 lname_alloc:1;
	u8		 sorted_by_name;
	u8		 loaded;
	u8		 build_id[BUILD_ID_SIZE];
	const char	 *short_name;
	char	 	 *long_name;
	u16		 long_name_len;
	u16		 short_name_len;
	char		 name[0];
};

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

#ifndef NO_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;
#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);

#define DSO__SWAP(dso, type, val)			\
({							\
	type ____r = val;				\
	BUG_ON(dso->needs_swap == DSO_SWAP__UNSET);	\
	if (dso->needs_swap == DSO_SWAP__YES) {		\
		switch (sizeof(____r)) {		\
		case 2:					\
			____r = bswap_16(val);		\
			break;				\
		case 4:					\
			____r = bswap_32(val);		\
			break;				\
		case 8:					\
			____r = bswap_64(val);		\
			break;				\
		default:				\
			BUG_ON(1);			\
		}					\
	}						\
	____r;						\
})

struct dso *dso__new(const char *name);
void dso__delete(struct dso *dso);

int dso__name_len(const struct dso *dso);

bool dso__loaded(const struct dso *dso, enum map_type type);
bool dso__sorted_by_name(const struct dso *dso, enum map_type type);

static inline void dso__set_loaded(struct dso *dso, enum map_type type)
{
	dso->loaded |= (1 << type);
}

void dso__sort_by_name(struct dso *dso, enum map_type type);

void dsos__add(struct list_head *head, struct dso *dso);
struct dso *dsos__find(struct list_head *head, const char *name);
struct dso *__dsos__findnew(struct list_head *head, const char *name);

int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
int dso__load_vmlinux(struct dso *dso, struct map *map,
		      const char *vmlinux, symbol_filter_t filter);
int dso__load_vmlinux_path(struct dso *dso, struct map *map,
			   symbol_filter_t filter);
int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
		       symbol_filter_t filter);
int machine__load_kallsyms(struct machine *machine, const char *filename,
			   enum map_type type, symbol_filter_t filter);
int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
			       symbol_filter_t filter);

size_t __dsos__fprintf(struct list_head *head, FILE *fp);

size_t machine__fprintf_dsos_buildid(struct machine *machine,
				     FILE *fp, bool with_hits);
size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp);
size_t machines__fprintf_dsos_buildid(struct rb_root *machines,
				      FILE *fp, bool with_hits);
size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
size_t dso__fprintf_symbols_by_name(struct dso *dso,
				    enum map_type type, FILE *fp);
size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp);

char dso__symtab_origin(const struct dso *dso);
void dso__set_long_name(struct dso *dso, char *name);
void dso__set_build_id(struct dso *dso, void *build_id);
bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
void dso__read_running_kernel_build_id(struct dso *dso,
				       struct machine *machine);
struct map *dso__new_map(const char *name);
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);

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);
bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
int build_id__sprintf(const u8 *build_id, int len, char *bf);
int kallsyms__parse(const char *filename, void *arg,
		    int (*process_symbol)(void *arg, const char *name,
					  char type, u64 start));
int filename__read_debuglink(const char *filename, char *debuglink,
			     size_t size);

void machine__destroy_kernel_maps(struct machine *machine);
int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel);
int machine__create_kernel_maps(struct machine *machine);

int machines__create_kernel_maps(struct rb_root *machines, pid_t pid);
int machines__create_guest_kernel_maps(struct rb_root *machines);
void machines__destroy_guest_kernel_maps(struct rb_root *machines);

int symbol__init(void);
void symbol__exit(void);
void symbol__elf_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, FILE *fp);
size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
bool symbol_type__is_a(char symbol_type, enum map_type map_type);

size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);

int dso__binary_type_file(struct dso *dso, enum dso_binary_type type,
			  char *root_dir, char *file, size_t size);

int dso__data_fd(struct dso *dso, struct machine *machine);
ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
			      u64 offset, u8 *data, ssize_t size);
ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
			    struct machine *machine, u64 addr,
			    u8 *data, ssize_t size);
int dso__test_data(void);
int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
		  struct symsrc *runtime_ss, symbol_filter_t filter,
		  int kmodule);
int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
				struct map *map, symbol_filter_t filter);

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);

#endif /* __PERF_SYMBOL */