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 static inline size_t symbol__size(const struct symbol *sym) 83 { 84 return sym->end - sym->start + 1; 85 } 86 87 struct strlist; 88 89 struct symbol_conf { 90 unsigned short priv_size; 91 unsigned short nr_events; 92 bool try_vmlinux_path, 93 ignore_vmlinux, 94 show_kernel_path, 95 use_modules, 96 sort_by_name, 97 show_nr_samples, 98 show_total_period, 99 use_callchain, 100 exclude_other, 101 show_cpu_utilization, 102 initialized, 103 kptr_restrict, 104 annotate_asm_raw, 105 annotate_src, 106 event_group, 107 demangle; 108 const char *vmlinux_name, 109 *kallsyms_name, 110 *source_prefix, 111 *field_sep; 112 const char *default_guest_vmlinux_name, 113 *default_guest_kallsyms, 114 *default_guest_modules; 115 const char *guestmount; 116 const char *dso_list_str, 117 *comm_list_str, 118 *sym_list_str, 119 *col_width_list_str; 120 struct strlist *dso_list, 121 *comm_list, 122 *sym_list, 123 *dso_from_list, 124 *dso_to_list, 125 *sym_from_list, 126 *sym_to_list; 127 const char *symfs; 128 }; 129 130 extern struct symbol_conf symbol_conf; 131 extern int vmlinux_path__nr_entries; 132 extern char **vmlinux_path; 133 134 static inline void *symbol__priv(struct symbol *sym) 135 { 136 return ((void *)sym) - symbol_conf.priv_size; 137 } 138 139 struct ref_reloc_sym { 140 const char *name; 141 u64 addr; 142 u64 unrelocated_addr; 143 }; 144 145 struct map_symbol { 146 struct map *map; 147 struct symbol *sym; 148 bool unfolded; 149 bool has_children; 150 }; 151 152 struct addr_map_symbol { 153 struct map *map; 154 struct symbol *sym; 155 u64 addr; 156 u64 al_addr; 157 }; 158 159 struct branch_info { 160 struct addr_map_symbol from; 161 struct addr_map_symbol to; 162 struct branch_flags flags; 163 }; 164 165 struct mem_info { 166 struct addr_map_symbol iaddr; 167 struct addr_map_symbol daddr; 168 union perf_mem_data_src data_src; 169 }; 170 171 struct addr_location { 172 struct machine *machine; 173 struct thread *thread; 174 struct map *map; 175 struct symbol *sym; 176 u64 addr; 177 char level; 178 bool filtered; 179 u8 cpumode; 180 s32 cpu; 181 }; 182 183 struct symsrc { 184 char *name; 185 int fd; 186 enum dso_binary_type type; 187 188 #ifdef HAVE_LIBELF_SUPPORT 189 Elf *elf; 190 GElf_Ehdr ehdr; 191 192 Elf_Scn *opdsec; 193 size_t opdidx; 194 GElf_Shdr opdshdr; 195 196 Elf_Scn *symtab; 197 GElf_Shdr symshdr; 198 199 Elf_Scn *dynsym; 200 size_t dynsym_idx; 201 GElf_Shdr dynshdr; 202 203 bool adjust_symbols; 204 #endif 205 }; 206 207 void symsrc__destroy(struct symsrc *ss); 208 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 209 enum dso_binary_type type); 210 bool symsrc__has_symtab(struct symsrc *ss); 211 bool symsrc__possibly_runtime(struct symsrc *ss); 212 213 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 214 int dso__load_vmlinux(struct dso *dso, struct map *map, 215 const char *vmlinux, bool vmlinux_allocated, 216 symbol_filter_t filter); 217 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 218 symbol_filter_t filter); 219 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 220 symbol_filter_t filter); 221 222 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 223 u64 addr); 224 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 225 const char *name); 226 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 227 228 int filename__read_build_id(const char *filename, void *bf, size_t size); 229 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 230 int modules__parse(const char *filename, void *arg, 231 int (*process_module)(void *arg, const char *name, 232 u64 start)); 233 int filename__read_debuglink(const char *filename, char *debuglink, 234 size_t size); 235 236 int symbol__init(void); 237 void symbol__exit(void); 238 void symbol__elf_init(void); 239 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 240 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 241 const struct addr_location *al, FILE *fp); 242 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 243 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 244 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 245 bool symbol__restricted_filename(const char *filename, 246 const char *restricted_filename); 247 bool symbol__is_idle(struct symbol *sym); 248 249 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 250 struct symsrc *runtime_ss, symbol_filter_t filter, 251 int kmodule); 252 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 253 struct map *map, symbol_filter_t filter); 254 255 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 256 void symbols__fixup_duplicate(struct rb_root *symbols); 257 void symbols__fixup_end(struct rb_root *symbols); 258 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 259 260 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 261 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 262 bool *is_64_bit); 263 264 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 265 266 struct kcore_extract { 267 char *kcore_filename; 268 u64 addr; 269 u64 offs; 270 u64 len; 271 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 272 int fd; 273 }; 274 275 int kcore_extract__create(struct kcore_extract *kce); 276 void kcore_extract__delete(struct kcore_extract *kce); 277 278 int kcore_copy(const char *from_dir, const char *to_dir); 279 int compare_proc_modules(const char *from, const char *to); 280 281 int setup_list(struct strlist **list, const char *list_str, 282 const char *list_name); 283 284 #endif /* __PERF_SYMBOL */ 285