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 17 #ifdef HAVE_LIBELF_SUPPORT 18 #include <libelf.h> 19 #include <gelf.h> 20 #endif 21 #include <elf.h> 22 23 #include "dso.h" 24 25 #ifdef HAVE_CPLUS_DEMANGLE_SUPPORT 26 extern char *cplus_demangle(const char *, int); 27 28 static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i) 29 { 30 return cplus_demangle(c, i); 31 } 32 #else 33 #ifdef NO_DEMANGLE 34 static inline char *bfd_demangle(void __maybe_unused *v, 35 const char __maybe_unused *c, 36 int __maybe_unused i) 37 { 38 return NULL; 39 } 40 #else 41 #define PACKAGE 'perf' 42 #include <bfd.h> 43 #endif 44 #endif 45 46 /* 47 * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP; 48 * for newer versions we can use mmap to reduce memory usage: 49 */ 50 #ifdef HAVE_LIBELF_MMAP_SUPPORT 51 # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP 52 #else 53 # define PERF_ELF_C_READ_MMAP ELF_C_READ 54 #endif 55 56 #ifdef HAVE_LIBELF_SUPPORT 57 extern Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, 58 GElf_Shdr *shp, const char *name, size_t *idx); 59 #endif 60 61 #ifndef DMGL_PARAMS 62 #define DMGL_PARAMS (1 << 0) /* Include function args */ 63 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 64 #endif 65 66 /** struct symbol - symtab entry 67 * 68 * @ignore - resolvable but tools ignore it (e.g. idle routines) 69 */ 70 struct symbol { 71 struct rb_node rb_node; 72 u64 start; 73 u64 end; 74 u16 namelen; 75 u8 binding; 76 bool ignore; 77 char name[0]; 78 }; 79 80 void symbol__delete(struct symbol *sym); 81 void symbols__delete(struct rb_root *symbols); 82 83 /* symbols__for_each_entry - iterate over symbols (rb_root) 84 * 85 * @symbols: the rb_root of symbols 86 * @pos: the 'struct symbol *' to use as a loop cursor 87 * @nd: the 'struct rb_node *' to use as a temporary storage 88 */ 89 #define symbols__for_each_entry(symbols, pos, nd) \ 90 for (nd = rb_first(symbols); \ 91 nd && (pos = rb_entry(nd, struct symbol, rb_node)); \ 92 nd = rb_next(nd)) 93 94 static inline size_t symbol__size(const struct symbol *sym) 95 { 96 return sym->end - sym->start + 1; 97 } 98 99 struct strlist; 100 101 struct symbol_conf { 102 unsigned short priv_size; 103 unsigned short nr_events; 104 bool try_vmlinux_path, 105 ignore_vmlinux, 106 show_kernel_path, 107 use_modules, 108 sort_by_name, 109 show_nr_samples, 110 show_total_period, 111 use_callchain, 112 exclude_other, 113 show_cpu_utilization, 114 initialized, 115 kptr_restrict, 116 annotate_asm_raw, 117 annotate_src, 118 event_group, 119 demangle, 120 filter_relative; 121 const char *vmlinux_name, 122 *kallsyms_name, 123 *source_prefix, 124 *field_sep; 125 const char *default_guest_vmlinux_name, 126 *default_guest_kallsyms, 127 *default_guest_modules; 128 const char *guestmount; 129 const char *dso_list_str, 130 *comm_list_str, 131 *sym_list_str, 132 *col_width_list_str; 133 struct strlist *dso_list, 134 *comm_list, 135 *sym_list, 136 *dso_from_list, 137 *dso_to_list, 138 *sym_from_list, 139 *sym_to_list; 140 const char *symfs; 141 }; 142 143 extern struct symbol_conf symbol_conf; 144 extern int vmlinux_path__nr_entries; 145 extern char **vmlinux_path; 146 147 static inline void *symbol__priv(struct symbol *sym) 148 { 149 return ((void *)sym) - symbol_conf.priv_size; 150 } 151 152 struct ref_reloc_sym { 153 const char *name; 154 u64 addr; 155 u64 unrelocated_addr; 156 }; 157 158 struct map_symbol { 159 struct map *map; 160 struct symbol *sym; 161 bool unfolded; 162 bool has_children; 163 }; 164 165 struct addr_map_symbol { 166 struct map *map; 167 struct symbol *sym; 168 u64 addr; 169 u64 al_addr; 170 }; 171 172 struct branch_info { 173 struct addr_map_symbol from; 174 struct addr_map_symbol to; 175 struct branch_flags flags; 176 }; 177 178 struct mem_info { 179 struct addr_map_symbol iaddr; 180 struct addr_map_symbol daddr; 181 union perf_mem_data_src data_src; 182 }; 183 184 struct addr_location { 185 struct machine *machine; 186 struct thread *thread; 187 struct map *map; 188 struct symbol *sym; 189 u64 addr; 190 char level; 191 u8 filtered; 192 u8 cpumode; 193 s32 cpu; 194 }; 195 196 struct symsrc { 197 char *name; 198 int fd; 199 enum dso_binary_type type; 200 201 #ifdef HAVE_LIBELF_SUPPORT 202 Elf *elf; 203 GElf_Ehdr ehdr; 204 205 Elf_Scn *opdsec; 206 size_t opdidx; 207 GElf_Shdr opdshdr; 208 209 Elf_Scn *symtab; 210 GElf_Shdr symshdr; 211 212 Elf_Scn *dynsym; 213 size_t dynsym_idx; 214 GElf_Shdr dynshdr; 215 216 bool adjust_symbols; 217 #endif 218 }; 219 220 void symsrc__destroy(struct symsrc *ss); 221 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 222 enum dso_binary_type type); 223 bool symsrc__has_symtab(struct symsrc *ss); 224 bool symsrc__possibly_runtime(struct symsrc *ss); 225 226 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 227 int dso__load_vmlinux(struct dso *dso, struct map *map, 228 const char *vmlinux, bool vmlinux_allocated, 229 symbol_filter_t filter); 230 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 231 symbol_filter_t filter); 232 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 233 symbol_filter_t filter); 234 235 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 236 u64 addr); 237 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 238 const char *name); 239 240 int filename__read_build_id(const char *filename, void *bf, size_t size); 241 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 242 int modules__parse(const char *filename, void *arg, 243 int (*process_module)(void *arg, const char *name, 244 u64 start)); 245 int filename__read_debuglink(const char *filename, char *debuglink, 246 size_t size); 247 248 int symbol__init(void); 249 void symbol__exit(void); 250 void symbol__elf_init(void); 251 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 252 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 253 const struct addr_location *al, FILE *fp); 254 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 255 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 256 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 257 bool symbol__restricted_filename(const char *filename, 258 const char *restricted_filename); 259 bool symbol__is_idle(struct symbol *sym); 260 261 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 262 struct symsrc *runtime_ss, symbol_filter_t filter, 263 int kmodule); 264 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 265 struct map *map, symbol_filter_t filter); 266 267 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 268 void symbols__fixup_duplicate(struct rb_root *symbols); 269 void symbols__fixup_end(struct rb_root *symbols); 270 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 271 272 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 273 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 274 bool *is_64_bit); 275 276 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 277 278 struct kcore_extract { 279 char *kcore_filename; 280 u64 addr; 281 u64 offs; 282 u64 len; 283 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 284 int fd; 285 }; 286 287 int kcore_extract__create(struct kcore_extract *kce); 288 void kcore_extract__delete(struct kcore_extract *kce); 289 290 int kcore_copy(const char *from_dir, const char *to_dir); 291 int compare_proc_modules(const char *from, const char *to); 292 293 int setup_list(struct strlist **list, const char *list_str, 294 const char *list_name); 295 296 #endif /* __PERF_SYMBOL */ 297