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 #ifndef DMGL_PARAMS 56 #define DMGL_PARAMS (1 << 0) /* Include function args */ 57 #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ 58 #endif 59 60 /** struct symbol - symtab entry 61 * 62 * @ignore - resolvable but tools ignore it (e.g. idle routines) 63 */ 64 struct symbol { 65 struct rb_node rb_node; 66 u64 start; 67 u64 end; 68 u16 namelen; 69 u8 binding; 70 bool ignore; 71 char name[0]; 72 }; 73 74 void symbol__delete(struct symbol *sym); 75 void symbols__delete(struct rb_root *symbols); 76 77 static inline size_t symbol__size(const struct symbol *sym) 78 { 79 return sym->end - sym->start + 1; 80 } 81 82 struct strlist; 83 84 struct symbol_conf { 85 unsigned short priv_size; 86 unsigned short nr_events; 87 bool try_vmlinux_path, 88 ignore_vmlinux, 89 show_kernel_path, 90 use_modules, 91 sort_by_name, 92 show_nr_samples, 93 show_total_period, 94 use_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 const char *vmlinux_name, 104 *kallsyms_name, 105 *source_prefix, 106 *field_sep; 107 const char *default_guest_vmlinux_name, 108 *default_guest_kallsyms, 109 *default_guest_modules; 110 const char *guestmount; 111 const char *dso_list_str, 112 *comm_list_str, 113 *sym_list_str, 114 *col_width_list_str; 115 struct strlist *dso_list, 116 *comm_list, 117 *sym_list, 118 *dso_from_list, 119 *dso_to_list, 120 *sym_from_list, 121 *sym_to_list; 122 const char *symfs; 123 }; 124 125 extern struct symbol_conf symbol_conf; 126 extern int vmlinux_path__nr_entries; 127 extern char **vmlinux_path; 128 129 static inline void *symbol__priv(struct symbol *sym) 130 { 131 return ((void *)sym) - symbol_conf.priv_size; 132 } 133 134 struct ref_reloc_sym { 135 const char *name; 136 u64 addr; 137 u64 unrelocated_addr; 138 }; 139 140 struct map_symbol { 141 struct map *map; 142 struct symbol *sym; 143 bool unfolded; 144 bool has_children; 145 }; 146 147 struct addr_map_symbol { 148 struct map *map; 149 struct symbol *sym; 150 u64 addr; 151 u64 al_addr; 152 }; 153 154 struct branch_info { 155 struct addr_map_symbol from; 156 struct addr_map_symbol to; 157 struct branch_flags flags; 158 }; 159 160 struct mem_info { 161 struct addr_map_symbol iaddr; 162 struct addr_map_symbol daddr; 163 union perf_mem_data_src data_src; 164 }; 165 166 struct addr_location { 167 struct thread *thread; 168 struct map *map; 169 struct symbol *sym; 170 u64 addr; 171 char level; 172 bool filtered; 173 u8 cpumode; 174 s32 cpu; 175 }; 176 177 struct symsrc { 178 char *name; 179 int fd; 180 enum dso_binary_type type; 181 182 #ifdef HAVE_LIBELF_SUPPORT 183 Elf *elf; 184 GElf_Ehdr ehdr; 185 186 Elf_Scn *opdsec; 187 size_t opdidx; 188 GElf_Shdr opdshdr; 189 190 Elf_Scn *symtab; 191 GElf_Shdr symshdr; 192 193 Elf_Scn *dynsym; 194 size_t dynsym_idx; 195 GElf_Shdr dynshdr; 196 197 bool adjust_symbols; 198 #endif 199 }; 200 201 void symsrc__destroy(struct symsrc *ss); 202 int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name, 203 enum dso_binary_type type); 204 bool symsrc__has_symtab(struct symsrc *ss); 205 bool symsrc__possibly_runtime(struct symsrc *ss); 206 207 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter); 208 int dso__load_vmlinux(struct dso *dso, struct map *map, 209 const char *vmlinux, symbol_filter_t filter); 210 int dso__load_vmlinux_path(struct dso *dso, struct map *map, 211 symbol_filter_t filter); 212 int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map, 213 symbol_filter_t filter); 214 215 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, 216 u64 addr); 217 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type, 218 const char *name); 219 struct symbol *dso__first_symbol(struct dso *dso, enum map_type type); 220 221 int filename__read_build_id(const char *filename, void *bf, size_t size); 222 int sysfs__read_build_id(const char *filename, void *bf, size_t size); 223 int kallsyms__parse(const char *filename, void *arg, 224 int (*process_symbol)(void *arg, const char *name, 225 char type, u64 start)); 226 int modules__parse(const char *filename, void *arg, 227 int (*process_module)(void *arg, const char *name, 228 u64 start)); 229 int filename__read_debuglink(const char *filename, char *debuglink, 230 size_t size); 231 232 int symbol__init(void); 233 void symbol__exit(void); 234 void symbol__elf_init(void); 235 struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name); 236 size_t symbol__fprintf_symname_offs(const struct symbol *sym, 237 const struct addr_location *al, FILE *fp); 238 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp); 239 size_t symbol__fprintf(struct symbol *sym, FILE *fp); 240 bool symbol_type__is_a(char symbol_type, enum map_type map_type); 241 bool symbol__restricted_filename(const char *filename, 242 const char *restricted_filename); 243 244 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss, 245 struct symsrc *runtime_ss, symbol_filter_t filter, 246 int kmodule); 247 int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, 248 struct map *map, symbol_filter_t filter); 249 250 void symbols__insert(struct rb_root *symbols, struct symbol *sym); 251 void symbols__fixup_duplicate(struct rb_root *symbols); 252 void symbols__fixup_end(struct rb_root *symbols); 253 void __map_groups__fixup_end(struct map_groups *mg, enum map_type type); 254 255 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data); 256 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data, 257 bool *is_64_bit); 258 259 #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX" 260 261 struct kcore_extract { 262 char *kcore_filename; 263 u64 addr; 264 u64 offs; 265 u64 len; 266 char extract_filename[sizeof(PERF_KCORE_EXTRACT)]; 267 int fd; 268 }; 269 270 int kcore_extract__create(struct kcore_extract *kce); 271 void kcore_extract__delete(struct kcore_extract *kce); 272 273 int kcore_copy(const char *from_dir, const char *to_dir); 274 int compare_proc_modules(const char *from, const char *to); 275 276 #endif /* __PERF_SYMBOL */ 277