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 cumulate_callchain, 113 exclude_other, 114 show_cpu_utilization, 115 initialized, 116 kptr_restrict, 117 annotate_asm_raw, 118 annotate_src, 119 event_group, 120 demangle, 121 filter_relative; 122 const char *vmlinux_name, 123 *kallsyms_name, 124 *source_prefix, 125 *field_sep; 126 const char *default_guest_vmlinux_name, 127 *default_guest_kallsyms, 128 *default_guest_modules; 129 const char *guestmount; 130 const char *dso_list_str, 131 *comm_list_str, 132 *sym_list_str, 133 *col_width_list_str; 134 struct strlist *dso_list, 135 *comm_list, 136 *sym_list, 137 *dso_from_list, 138 *dso_to_list, 139 *sym_from_list, 140 *sym_to_list; 141 const char *symfs; 142 }; 143 144 extern struct symbol_conf symbol_conf; 145 extern int vmlinux_path__nr_entries; 146 extern char **vmlinux_path; 147 148 static inline void *symbol__priv(struct symbol *sym) 149 { 150 return ((void *)sym) - symbol_conf.priv_size; 151 } 152 153 struct ref_reloc_sym { 154 const char *name; 155 u64 addr; 156 u64 unrelocated_addr; 157 }; 158 159 struct map_symbol { 160 struct map *map; 161 struct symbol *sym; 162 bool unfolded; 163 bool has_children; 164 }; 165 166 struct addr_map_symbol { 167 struct map *map; 168 struct symbol *sym; 169 u64 addr; 170 u64 al_addr; 171 }; 172 173 struct branch_info { 174 struct addr_map_symbol from; 175 struct addr_map_symbol to; 176 struct branch_flags flags; 177 }; 178 179 struct mem_info { 180 struct addr_map_symbol iaddr; 181 struct addr_map_symbol daddr; 182 union perf_mem_data_src data_src; 183 }; 184 185 struct addr_location { 186 struct machine *machine; 187 struct thread *thread; 188 struct map *map; 189 struct symbol *sym; 190 u64 addr; 191 char level; 192 u8 filtered; 193 u8 cpumode; 194 s32 cpu; 195 }; 196 197 struct symsrc { 198 char *name; 199 int fd; 200 enum dso_binary_type type; 201 202 #ifdef HAVE_LIBELF_SUPPORT 203 Elf *elf; 204 GElf_Ehdr ehdr; 205 206 Elf_Scn *opdsec; 207 size_t opdidx; 208 GElf_Shdr opdshdr; 209 210 Elf_Scn *symtab; 211 GElf_Shdr symshdr; 212 213 Elf_Scn *dynsym; 214 size_t dynsym_idx; 215 GElf_Shdr dynshdr; 216 217 bool adjust_symbols; 218 #endif 219 }; 220 221 void symsrc__destroy(struct symsrc *ss); 222 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 223 enum dso_binary_type type); 224 bool symsrc__has_symtab(struct symsrc *ss); 225 bool symsrc__possibly_runtime(struct symsrc *ss); 226 227 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 228 int dso__load_vmlinux(struct dso *dso, struct map *map, 229 const char *vmlinux, bool vmlinux_allocated, 230 symbol_filter_t filter); 231 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 232 symbol_filter_t filter); 233 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 234 symbol_filter_t filter); 235 236 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 237 u64 addr); 238 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 239 const char *name); 240 241 int filename__read_build_id(const char *filename, void *bf, size_t size); 242 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 243 int modules__parse(const char *filename, void *arg, 244 int (*process_module)(void *arg, const char *name, 245 u64 start)); 246 int filename__read_debuglink(const char *filename, char *debuglink, 247 size_t size); 248 249 int symbol__init(void); 250 void symbol__exit(void); 251 void symbol__elf_init(void); 252 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 253 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 254 const struct addr_location *al, FILE *fp); 255 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 256 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 257 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 258 bool symbol__restricted_filename(const char *filename, 259 const char *restricted_filename); 260 bool symbol__is_idle(struct symbol *sym); 261 262 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 263 struct symsrc *runtime_ss, symbol_filter_t filter, 264 int kmodule); 265 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 266 struct map *map, symbol_filter_t filter); 267 268 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 269 void symbols__fixup_duplicate(struct rb_root *symbols); 270 void symbols__fixup_end(struct rb_root *symbols); 271 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 272 273 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 274 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 275 bool *is_64_bit); 276 277 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 278 279 struct kcore_extract { 280 char *kcore_filename; 281 u64 addr; 282 u64 offs; 283 u64 len; 284 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 285 int fd; 286 }; 287 288 int kcore_extract__create(struct kcore_extract *kce); 289 void kcore_extract__delete(struct kcore_extract *kce); 290 291 int kcore_copy(const char *from_dir, const char *to_dir); 292 int compare_proc_modules(const char *from, const char *to); 293 294 int setup_list(struct strlist **list, const char *list_str, 295 const char *list_name); 296 297 #endif /* __PERF_SYMBOL */ 298