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 #ifdef ANDROID
41 /* in external/gcc-demangle */
42 extern char *__cxa_demangle (const char *, char *, size_t *, int *);
43
bfd_demangle(void * v,const char * c,int i)44 static inline char *bfd_demangle(void *v, const char *c, int i)
45 {
46 return __cxa_demangle(c, NULL, NULL, NULL);
47 }
48 #else
49 #define PACKAGE 'perf'
50 #include <bfd.h>
51 #endif
52 #endif
53 #endif
54
55 /*
56 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
57 * for newer versions we can use mmap to reduce memory usage:
58 */
59 #ifdef LIBELF_MMAP
60 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
61 #else
62 # define PERF_ELF_C_READ_MMAP ELF_C_READ
63 #endif
64
65 #ifndef DMGL_PARAMS
66 #define DMGL_PARAMS (1 << 0) /* Include function args */
67 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
68 #endif
69
70 /** struct symbol - symtab entry
71 *
72 * @ignore - resolvable but tools ignore it (e.g. idle routines)
73 */
74 struct symbol {
75 struct rb_node rb_node;
76 u64 start;
77 u64 end;
78 u16 namelen;
79 u8 binding;
80 bool ignore;
81 char name[0];
82 };
83
84 void symbol__delete(struct symbol *sym);
85 void symbols__delete(struct rb_root *symbols);
86
symbol__size(const struct symbol * sym)87 static inline size_t symbol__size(const struct symbol *sym)
88 {
89 return sym->end - sym->start + 1;
90 }
91
92 struct strlist;
93
94 struct symbol_conf {
95 unsigned short priv_size;
96 unsigned short nr_events;
97 bool try_vmlinux_path,
98 show_kernel_path,
99 use_modules,
100 sort_by_name,
101 show_nr_samples,
102 show_total_period,
103 use_callchain,
104 exclude_other,
105 show_cpu_utilization,
106 initialized,
107 kptr_restrict,
108 annotate_asm_raw,
109 annotate_src,
110 event_group,
111 demangle;
112 const char *vmlinux_name,
113 *kallsyms_name,
114 *source_prefix,
115 *field_sep;
116 const char *default_guest_vmlinux_name,
117 *default_guest_kallsyms,
118 *default_guest_modules;
119 const char *guestmount;
120 const char *dso_list_str,
121 *comm_list_str,
122 *sym_list_str,
123 *col_width_list_str;
124 struct strlist *dso_list,
125 *comm_list,
126 *sym_list,
127 *dso_from_list,
128 *dso_to_list,
129 *sym_from_list,
130 *sym_to_list;
131 const char *symfs;
132 };
133
134 extern struct symbol_conf symbol_conf;
135 extern int vmlinux_path__nr_entries;
136 extern char **vmlinux_path;
137
symbol__priv(struct symbol * sym)138 static inline void *symbol__priv(struct symbol *sym)
139 {
140 return ((void *)sym) - symbol_conf.priv_size;
141 }
142
143 struct ref_reloc_sym {
144 const char *name;
145 u64 addr;
146 u64 unrelocated_addr;
147 };
148
149 struct map_symbol {
150 struct map *map;
151 struct symbol *sym;
152 bool unfolded;
153 bool has_children;
154 };
155
156 struct addr_map_symbol {
157 struct map *map;
158 struct symbol *sym;
159 u64 addr;
160 u64 al_addr;
161 };
162
163 struct branch_info {
164 struct addr_map_symbol from;
165 struct addr_map_symbol to;
166 struct branch_flags flags;
167 };
168
169 struct mem_info {
170 struct addr_map_symbol iaddr;
171 struct addr_map_symbol daddr;
172 union perf_mem_data_src data_src;
173 };
174
175 struct addr_location {
176 struct thread *thread;
177 struct map *map;
178 struct symbol *sym;
179 u64 addr;
180 char level;
181 bool filtered;
182 u8 cpumode;
183 s32 cpu;
184 };
185
186 struct symsrc {
187 char *name;
188 int fd;
189 enum dso_binary_type type;
190
191 #ifdef LIBELF_SUPPORT
192 Elf *elf;
193 GElf_Ehdr ehdr;
194
195 Elf_Scn *opdsec;
196 size_t opdidx;
197 GElf_Shdr opdshdr;
198
199 Elf_Scn *symtab;
200 GElf_Shdr symshdr;
201
202 Elf_Scn *dynsym;
203 size_t dynsym_idx;
204 GElf_Shdr dynshdr;
205
206 bool adjust_symbols;
207 #endif
208 };
209
210 void symsrc__destroy(struct symsrc *ss);
211 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
212 enum dso_binary_type type);
213 bool symsrc__has_symtab(struct symsrc *ss);
214 bool symsrc__possibly_runtime(struct symsrc *ss);
215
216 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
217 int dso__load_vmlinux(struct dso *dso, struct map *map,
218 const char *vmlinux, symbol_filter_t filter);
219 int dso__load_vmlinux_path(struct dso *dso, struct map *map,
220 symbol_filter_t filter);
221 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
222 symbol_filter_t filter);
223
224 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
225 u64 addr);
226 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
227 const char *name);
228 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
229
230 int filename__read_build_id(const char *filename, void *bf, size_t size);
231 int sysfs__read_build_id(const char *filename, void *bf, size_t size);
232 int kallsyms__parse(const char *filename, void *arg,
233 int (*process_symbol)(void *arg, const char *name,
234 char type, u64 start));
235 int filename__read_debuglink(const char *filename, char *debuglink,
236 size_t size);
237
238 int symbol__init(void);
239 void symbol__exit(void);
240 void symbol__elf_init(void);
241 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
242 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
243 const struct addr_location *al, FILE *fp);
244 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
245 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
246 bool symbol_type__is_a(char symbol_type, enum map_type map_type);
247 bool symbol__restricted_filename(const char *filename,
248 const char *restricted_filename);
249
250 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
251 struct symsrc *runtime_ss, symbol_filter_t filter,
252 int kmodule);
253 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
254 struct map *map, symbol_filter_t filter);
255
256 void symbols__insert(struct rb_root *symbols, struct symbol *sym);
257 void symbols__fixup_duplicate(struct rb_root *symbols);
258 void symbols__fixup_end(struct rb_root *symbols);
259 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
260
261 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
262 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
263 bool *is_64_bit);
264
265 #endif /* __PERF_SYMBOL */
266