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