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