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
16 #ifdef LIBELF_SUPPORT
17 #include <libelf.h>
18 #include <gelf.h>
19 #endif
20 #include <elf.h>
21
22 #include "dso.h"
23
24 #ifdef HAVE_CPLUS_DEMANGLE
25 extern char *cplus_demangle(const char *, int);
26
bfd_demangle(void __maybe_unused * v,const char * c,int i)27 static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i)
28 {
29 return cplus_demangle(c, i);
30 }
31 #else
32 #ifdef NO_DEMANGLE
bfd_demangle(void __maybe_unused * v,const char __maybe_unused * c,int __maybe_unused i)33 static inline char *bfd_demangle(void __maybe_unused *v,
34 const char __maybe_unused *c,
35 int __maybe_unused i)
36 {
37 return NULL;
38 }
39 #else
40 #define PACKAGE 'perf'
41 #include <bfd.h>
42 #endif
43 #endif
44
45 /*
46 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
47 * for newer versions we can use mmap to reduce memory usage:
48 */
49 #ifdef LIBELF_MMAP
50 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
51 #else
52 # define PERF_ELF_C_READ_MMAP ELF_C_READ
53 #endif
54
55 #ifndef DMGL_PARAMS
56 #define DMGL_PARAMS (1 << 0) /* Include function args */
57 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
58 #endif
59
60 /** struct symbol - symtab entry
61 *
62 * @ignore - resolvable but tools ignore it (e.g. idle routines)
63 */
64 struct symbol {
65 struct rb_node rb_node;
66 u64 start;
67 u64 end;
68 u16 namelen;
69 u8 binding;
70 bool ignore;
71 char name[0];
72 };
73
74 void symbol__delete(struct symbol *sym);
75 void symbols__delete(struct rb_root *symbols);
76
symbol__size(const struct symbol * sym)77 static inline size_t symbol__size(const struct symbol *sym)
78 {
79 return sym->end - sym->start + 1;
80 }
81
82 struct strlist;
83
84 struct symbol_conf {
85 unsigned short priv_size;
86 unsigned short nr_events;
87 bool try_vmlinux_path,
88 show_kernel_path,
89 use_modules,
90 sort_by_name,
91 show_nr_samples,
92 show_total_period,
93 use_callchain,
94 exclude_other,
95 show_cpu_utilization,
96 initialized,
97 kptr_restrict,
98 annotate_asm_raw,
99 annotate_src,
100 event_group,
101 demangle;
102 const char *vmlinux_name,
103 *kallsyms_name,
104 *source_prefix,
105 *field_sep;
106 const char *default_guest_vmlinux_name,
107 *default_guest_kallsyms,
108 *default_guest_modules;
109 const char *guestmount;
110 const char *dso_list_str,
111 *comm_list_str,
112 *sym_list_str,
113 *col_width_list_str;
114 struct strlist *dso_list,
115 *comm_list,
116 *sym_list,
117 *dso_from_list,
118 *dso_to_list,
119 *sym_from_list,
120 *sym_to_list;
121 const char *symfs;
122 };
123
124 extern struct symbol_conf symbol_conf;
125 extern int vmlinux_path__nr_entries;
126 extern char **vmlinux_path;
127
symbol__priv(struct symbol * sym)128 static inline void *symbol__priv(struct symbol *sym)
129 {
130 return ((void *)sym) - symbol_conf.priv_size;
131 }
132
133 struct ref_reloc_sym {
134 const char *name;
135 u64 addr;
136 u64 unrelocated_addr;
137 };
138
139 struct map_symbol {
140 struct map *map;
141 struct symbol *sym;
142 bool unfolded;
143 bool has_children;
144 };
145
146 struct addr_map_symbol {
147 struct map *map;
148 struct symbol *sym;
149 u64 addr;
150 u64 al_addr;
151 };
152
153 struct branch_info {
154 struct addr_map_symbol from;
155 struct addr_map_symbol to;
156 struct branch_flags flags;
157 };
158
159 struct mem_info {
160 struct addr_map_symbol iaddr;
161 struct addr_map_symbol daddr;
162 union perf_mem_data_src data_src;
163 };
164
165 struct addr_location {
166 struct thread *thread;
167 struct map *map;
168 struct symbol *sym;
169 u64 addr;
170 char level;
171 bool filtered;
172 u8 cpumode;
173 s32 cpu;
174 };
175
176 struct symsrc {
177 char *name;
178 int fd;
179 enum dso_binary_type type;
180
181 #ifdef LIBELF_SUPPORT
182 Elf *elf;
183 GElf_Ehdr ehdr;
184
185 Elf_Scn *opdsec;
186 size_t opdidx;
187 GElf_Shdr opdshdr;
188
189 Elf_Scn *symtab;
190 GElf_Shdr symshdr;
191
192 Elf_Scn *dynsym;
193 size_t dynsym_idx;
194 GElf_Shdr dynshdr;
195
196 bool adjust_symbols;
197 #endif
198 };
199
200 void symsrc__destroy(struct symsrc *ss);
201 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
202 enum dso_binary_type type);
203 bool symsrc__has_symtab(struct symsrc *ss);
204 bool symsrc__possibly_runtime(struct symsrc *ss);
205
206 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
207 int dso__load_vmlinux(struct dso *dso, struct map *map,
208 const char *vmlinux, symbol_filter_t filter);
209 int dso__load_vmlinux_path(struct dso *dso, struct map *map,
210 symbol_filter_t filter);
211 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
212 symbol_filter_t filter);
213
214 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
215 u64 addr);
216 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
217 const char *name);
218 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
219
220 int filename__read_build_id(const char *filename, void *bf, size_t size);
221 int sysfs__read_build_id(const char *filename, void *bf, size_t size);
222 int kallsyms__parse(const char *filename, void *arg,
223 int (*process_symbol)(void *arg, const char *name,
224 char type, u64 start));
225 int filename__read_debuglink(const char *filename, char *debuglink,
226 size_t size);
227
228 int symbol__init(void);
229 void symbol__exit(void);
230 void symbol__elf_init(void);
231 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
232 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
233 const struct addr_location *al, FILE *fp);
234 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
235 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
236 bool symbol_type__is_a(char symbol_type, enum map_type map_type);
237 bool symbol__restricted_filename(const char *filename,
238 const char *restricted_filename);
239
240 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
241 struct symsrc *runtime_ss, symbol_filter_t filter,
242 int kmodule);
243 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
244 struct map *map, symbol_filter_t filter);
245
246 void symbols__insert(struct rb_root *symbols, struct symbol *sym);
247 void symbols__fixup_duplicate(struct rb_root *symbols);
248 void symbols__fixup_end(struct rb_root *symbols);
249 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
250
251 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
252 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
253 bool *is_64_bit);
254
255 #endif /* __PERF_SYMBOL */
256