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 #ifdef HAVE_CPLUS_DEMANGLE_SUPPORT 27 extern char *cplus_demangle(const char *, int); 28 29 static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i) 30 { 31 return cplus_demangle(c, i); 32 } 33 #else 34 #ifdef NO_DEMANGLE 35 static inline char *bfd_demangle(void __maybe_unused *v, 36 const char __maybe_unused *c, 37 int __maybe_unused i) 38 { 39 return NULL; 40 } 41 #else 42 #define PACKAGE 'perf' 43 #include <bfd.h> 44 #endif 45 #endif 46 47 /* 48 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP; 49 * for newer versions we can use mmap to reduce memory usage: 50 */ 51 #ifdef HAVE_LIBELF_MMAP_SUPPORT 52 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP 53 #else 54 # define PERF_ELF_C_READ_MMAP ELF_C_READ 55 #endif 56 57 #ifdef HAVE_LIBELF_SUPPORT 58 extern Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, 59 GElf_Shdr *shp, const char *name, size_t *idx); 60 #endif 61 62 #ifndef DMGL_PARAMS 63 #define DMGL_NO_OPTS 0 /* For readability... */ 64 #define DMGL_PARAMS (1 << 0) /* Include function args */ 65 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 66 #endif 67 68 /** struct symbol - symtab entry 69 * 70 * @ignore - resolvable but tools ignore it (e.g. idle routines) 71 */ 72 struct symbol { 73 struct rb_node rb_node; 74 u64 start; 75 u64 end; 76 u16 namelen; 77 u8 binding; 78 bool ignore; 79 char name[0]; 80 }; 81 82 void symbol__delete(struct symbol *sym); 83 void symbols__delete(struct rb_root *symbols); 84 85 /* symbols__for_each_entry - iterate over symbols (rb_root) 86 * 87 * @symbols: the rb_root of symbols 88 * @pos: the 'struct symbol *' to use as a loop cursor 89 * @nd: the 'struct rb_node *' to use as a temporary storage 90 */ 91 #define symbols__for_each_entry(symbols, pos, nd) \ 92 for (nd = rb_first(symbols); \ 93 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \ 94 nd = rb_next(nd)) 95 96 static inline size_t symbol__size(const struct symbol *sym) 97 { 98 return sym->end - sym->start; 99 } 100 101 struct strlist; 102 103 struct symbol_conf { 104 unsigned short priv_size; 105 unsigned short nr_events; 106 bool try_vmlinux_path, 107 ignore_vmlinux, 108 show_kernel_path, 109 use_modules, 110 sort_by_name, 111 show_nr_samples, 112 show_total_period, 113 use_callchain, 114 cumulate_callchain, 115 exclude_other, 116 show_cpu_utilization, 117 initialized, 118 kptr_restrict, 119 annotate_asm_raw, 120 annotate_src, 121 event_group, 122 demangle, 123 demangle_kernel, 124 filter_relative, 125 show_hist_headers; 126 const char *vmlinux_name, 127 *kallsyms_name, 128 *source_prefix, 129 *field_sep; 130 const char *default_guest_vmlinux_name, 131 *default_guest_kallsyms, 132 *default_guest_modules; 133 const char *guestmount; 134 const char *dso_list_str, 135 *comm_list_str, 136 *sym_list_str, 137 *col_width_list_str; 138 struct strlist *dso_list, 139 *comm_list, 140 *sym_list, 141 *dso_from_list, 142 *dso_to_list, 143 *sym_from_list, 144 *sym_to_list; 145 const char *symfs; 146 }; 147 148 extern struct symbol_conf symbol_conf; 149 150 static inline int __symbol__join_symfs(char *bf, size_t size, const char *path) 151 { 152 return path__join(bf, size, symbol_conf.symfs, path); 153 } 154 155 #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path) 156 157 extern int vmlinux_path__nr_entries; 158 extern char **vmlinux_path; 159 160 static inline void *symbol__priv(struct symbol *sym) 161 { 162 return ((void *)sym) - symbol_conf.priv_size; 163 } 164 165 struct ref_reloc_sym { 166 const char *name; 167 u64 addr; 168 u64 unrelocated_addr; 169 }; 170 171 struct map_symbol { 172 struct map *map; 173 struct symbol *sym; 174 bool unfolded; 175 bool has_children; 176 }; 177 178 struct addr_map_symbol { 179 struct map *map; 180 struct symbol *sym; 181 u64 addr; 182 u64 al_addr; 183 }; 184 185 struct branch_info { 186 struct addr_map_symbol from; 187 struct addr_map_symbol to; 188 struct branch_flags flags; 189 }; 190 191 struct mem_info { 192 struct addr_map_symbol iaddr; 193 struct addr_map_symbol daddr; 194 union perf_mem_data_src data_src; 195 }; 196 197 struct addr_location { 198 struct machine *machine; 199 struct thread *thread; 200 struct map *map; 201 struct symbol *sym; 202 u64 addr; 203 char level; 204 u8 filtered; 205 u8 cpumode; 206 s32 cpu; 207 }; 208 209 struct symsrc { 210 char *name; 211 int fd; 212 enum dso_binary_type type; 213 214 #ifdef HAVE_LIBELF_SUPPORT 215 Elf *elf; 216 GElf_Ehdr ehdr; 217 218 Elf_Scn *opdsec; 219 size_t opdidx; 220 GElf_Shdr opdshdr; 221 222 Elf_Scn *symtab; 223 GElf_Shdr symshdr; 224 225 Elf_Scn *dynsym; 226 size_t dynsym_idx; 227 GElf_Shdr dynshdr; 228 229 bool adjust_symbols; 230 bool is_64_bit; 231 #endif 232 }; 233 234 void symsrc__destroy(struct symsrc *ss); 235 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 236 enum dso_binary_type type); 237 bool symsrc__has_symtab(struct symsrc *ss); 238 bool symsrc__possibly_runtime(struct symsrc *ss); 239 240 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 241 int dso__load_vmlinux(struct dso *dso, struct map *map, 242 const char *vmlinux, bool vmlinux_allocated, 243 symbol_filter_t filter); 244 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 245 symbol_filter_t filter); 246 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 247 symbol_filter_t filter); 248 249 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 250 u64 addr); 251 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 252 const char *name); 253 254 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 255 struct symbol *dso__next_symbol(struct symbol *sym); 256 257 enum dso_type dso__type_fd(int fd); 258 259 int filename__read_build_id(const char *filename, void *bf, size_t size); 260 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 261 int modules__parse(const char *filename, void *arg, 262 int (*process_module)(void *arg, const char *name, 263 u64 start)); 264 int filename__read_debuglink(const char *filename, char *debuglink, 265 size_t size); 266 267 struct perf_session_env; 268 int symbol__init(struct perf_session_env *env); 269 void symbol__exit(void); 270 void symbol__elf_init(void); 271 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 272 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 273 const struct addr_location *al, FILE *fp); 274 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 275 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 276 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 277 bool symbol__restricted_filename(const char *filename, 278 const char *restricted_filename); 279 bool symbol__is_idle(struct symbol *sym); 280 281 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 282 struct symsrc *runtime_ss, symbol_filter_t filter, 283 int kmodule); 284 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 285 struct map *map, symbol_filter_t filter); 286 287 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 288 void symbols__fixup_duplicate(struct rb_root *symbols); 289 void symbols__fixup_end(struct rb_root *symbols); 290 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 291 292 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 293 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 294 bool *is_64_bit); 295 296 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 297 298 struct kcore_extract { 299 char *kcore_filename; 300 u64 addr; 301 u64 offs; 302 u64 len; 303 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 304 int fd; 305 }; 306 307 int kcore_extract__create(struct kcore_extract *kce); 308 void kcore_extract__delete(struct kcore_extract *kce); 309 310 int kcore_copy(const char *from_dir, const char *to_dir); 311 int compare_proc_modules(const char *from, const char *to); 312 313 int setup_list(struct strlist **list, const char *list_str, 314 const char *list_name); 315 316 #endif /* __PERF_SYMBOL */ 317