symbol.h 7.5 KB

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  1. #ifndef __PERF_SYMBOL
  2. #define __PERF_SYMBOL 1
  3. #include <linux/types.h>
  4. #include <stdbool.h>
  5. #include <stdint.h>
  6. #include "map.h"
  7. #include "../perf.h"
  8. #include <linux/list.h>
  9. #include <linux/rbtree.h>
  10. #include <stdio.h>
  11. #include <byteswap.h>
  12. #include <libgen.h>
  13. #include "build-id.h"
  14. #include "event.h"
  15. #include "util.h"
  16. #ifdef HAVE_LIBELF_SUPPORT
  17. #include <libelf.h>
  18. #include <gelf.h>
  19. #endif
  20. #include <elf.h>
  21. #include "dso.h"
  22. /*
  23. * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
  24. * for newer versions we can use mmap to reduce memory usage:
  25. */
  26. #ifdef HAVE_LIBELF_MMAP_SUPPORT
  27. # define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
  28. #else
  29. # define PERF_ELF_C_READ_MMAP ELF_C_READ
  30. #endif
  31. #ifdef HAVE_LIBELF_SUPPORT
  32. extern Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
  33. GElf_Shdr *shp, const char *name, size_t *idx);
  34. #endif
  35. #ifndef DMGL_PARAMS
  36. #define DMGL_NO_OPTS 0 /* For readability... */
  37. #define DMGL_PARAMS (1 << 0) /* Include function args */
  38. #define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
  39. #endif
  40. /** struct symbol - symtab entry
  41. *
  42. * @ignore - resolvable but tools ignore it (e.g. idle routines)
  43. */
  44. struct symbol {
  45. struct rb_node rb_node;
  46. u64 start;
  47. u64 end;
  48. u16 namelen;
  49. u8 binding;
  50. bool ignore;
  51. char name[0];
  52. };
  53. void symbol__delete(struct symbol *sym);
  54. void symbols__delete(struct rb_root *symbols);
  55. /* symbols__for_each_entry - iterate over symbols (rb_root)
  56. *
  57. * @symbols: the rb_root of symbols
  58. * @pos: the 'struct symbol *' to use as a loop cursor
  59. * @nd: the 'struct rb_node *' to use as a temporary storage
  60. */
  61. #define symbols__for_each_entry(symbols, pos, nd) \
  62. for (nd = rb_first(symbols); \
  63. nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
  64. nd = rb_next(nd))
  65. static inline size_t symbol__size(const struct symbol *sym)
  66. {
  67. return sym->end - sym->start;
  68. }
  69. struct strlist;
  70. struct symbol_conf {
  71. unsigned short priv_size;
  72. unsigned short nr_events;
  73. bool try_vmlinux_path,
  74. ignore_vmlinux,
  75. ignore_vmlinux_buildid,
  76. show_kernel_path,
  77. use_modules,
  78. sort_by_name,
  79. show_nr_samples,
  80. show_total_period,
  81. use_callchain,
  82. cumulate_callchain,
  83. exclude_other,
  84. show_cpu_utilization,
  85. initialized,
  86. kptr_restrict,
  87. annotate_asm_raw,
  88. annotate_src,
  89. event_group,
  90. demangle,
  91. demangle_kernel,
  92. filter_relative,
  93. show_hist_headers,
  94. branch_callstack;
  95. const char *vmlinux_name,
  96. *kallsyms_name,
  97. *source_prefix,
  98. *field_sep;
  99. const char *default_guest_vmlinux_name,
  100. *default_guest_kallsyms,
  101. *default_guest_modules;
  102. const char *guestmount;
  103. const char *dso_list_str,
  104. *comm_list_str,
  105. *sym_list_str,
  106. *col_width_list_str;
  107. struct strlist *dso_list,
  108. *comm_list,
  109. *sym_list,
  110. *dso_from_list,
  111. *dso_to_list,
  112. *sym_from_list,
  113. *sym_to_list;
  114. const char *symfs;
  115. };
  116. extern struct symbol_conf symbol_conf;
  117. static inline int __symbol__join_symfs(char *bf, size_t size, const char *path)
  118. {
  119. return path__join(bf, size, symbol_conf.symfs, path);
  120. }
  121. #define symbol__join_symfs(bf, path) __symbol__join_symfs(bf, sizeof(bf), path)
  122. extern int vmlinux_path__nr_entries;
  123. extern char **vmlinux_path;
  124. static inline void *symbol__priv(struct symbol *sym)
  125. {
  126. return ((void *)sym) - symbol_conf.priv_size;
  127. }
  128. struct ref_reloc_sym {
  129. const char *name;
  130. u64 addr;
  131. u64 unrelocated_addr;
  132. };
  133. struct map_symbol {
  134. struct map *map;
  135. struct symbol *sym;
  136. bool unfolded;
  137. bool has_children;
  138. };
  139. struct addr_map_symbol {
  140. struct map *map;
  141. struct symbol *sym;
  142. u64 addr;
  143. u64 al_addr;
  144. };
  145. struct branch_info {
  146. struct addr_map_symbol from;
  147. struct addr_map_symbol to;
  148. struct branch_flags flags;
  149. };
  150. struct mem_info {
  151. struct addr_map_symbol iaddr;
  152. struct addr_map_symbol daddr;
  153. union perf_mem_data_src data_src;
  154. };
  155. struct addr_location {
  156. struct machine *machine;
  157. struct thread *thread;
  158. struct map *map;
  159. struct symbol *sym;
  160. u64 addr;
  161. char level;
  162. u8 filtered;
  163. u8 cpumode;
  164. s32 cpu;
  165. };
  166. struct symsrc {
  167. char *name;
  168. int fd;
  169. enum dso_binary_type type;
  170. #ifdef HAVE_LIBELF_SUPPORT
  171. Elf *elf;
  172. GElf_Ehdr ehdr;
  173. Elf_Scn *opdsec;
  174. size_t opdidx;
  175. GElf_Shdr opdshdr;
  176. Elf_Scn *symtab;
  177. GElf_Shdr symshdr;
  178. Elf_Scn *dynsym;
  179. size_t dynsym_idx;
  180. GElf_Shdr dynshdr;
  181. bool adjust_symbols;
  182. bool is_64_bit;
  183. #endif
  184. };
  185. void symsrc__destroy(struct symsrc *ss);
  186. int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
  187. enum dso_binary_type type);
  188. bool symsrc__has_symtab(struct symsrc *ss);
  189. bool symsrc__possibly_runtime(struct symsrc *ss);
  190. int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
  191. int dso__load_vmlinux(struct dso *dso, struct map *map,
  192. const char *vmlinux, bool vmlinux_allocated,
  193. symbol_filter_t filter);
  194. int dso__load_vmlinux_path(struct dso *dso, struct map *map,
  195. symbol_filter_t filter);
  196. int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map,
  197. symbol_filter_t filter);
  198. struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
  199. u64 addr);
  200. struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
  201. const char *name);
  202. struct symbol *symbol__next_by_name(struct symbol *sym);
  203. struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
  204. struct symbol *dso__next_symbol(struct symbol *sym);
  205. enum dso_type dso__type_fd(int fd);
  206. int filename__read_build_id(const char *filename, void *bf, size_t size);
  207. int sysfs__read_build_id(const char *filename, void *bf, size_t size);
  208. int modules__parse(const char *filename, void *arg,
  209. int (*process_module)(void *arg, const char *name,
  210. u64 start));
  211. int filename__read_debuglink(const char *filename, char *debuglink,
  212. size_t size);
  213. struct perf_session_env;
  214. int symbol__init(struct perf_session_env *env);
  215. void symbol__exit(void);
  216. void symbol__elf_init(void);
  217. struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
  218. size_t symbol__fprintf_symname_offs(const struct symbol *sym,
  219. const struct addr_location *al, FILE *fp);
  220. size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
  221. size_t symbol__fprintf(struct symbol *sym, FILE *fp);
  222. bool symbol_type__is_a(char symbol_type, enum map_type map_type);
  223. bool symbol__restricted_filename(const char *filename,
  224. const char *restricted_filename);
  225. bool symbol__is_idle(struct symbol *sym);
  226. int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
  227. struct symsrc *runtime_ss, symbol_filter_t filter,
  228. int kmodule);
  229. int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
  230. struct map *map, symbol_filter_t filter);
  231. void symbols__insert(struct rb_root *symbols, struct symbol *sym);
  232. void symbols__fixup_duplicate(struct rb_root *symbols);
  233. void symbols__fixup_end(struct rb_root *symbols);
  234. void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
  235. typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
  236. int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
  237. bool *is_64_bit);
  238. #define PERF_KCORE_EXTRACT "/tmp/perf-kcore-XXXXXX"
  239. struct kcore_extract {
  240. char *kcore_filename;
  241. u64 addr;
  242. u64 offs;
  243. u64 len;
  244. char extract_filename[sizeof(PERF_KCORE_EXTRACT)];
  245. int fd;
  246. };
  247. int kcore_extract__create(struct kcore_extract *kce);
  248. void kcore_extract__delete(struct kcore_extract *kce);
  249. int kcore_copy(const char *from_dir, const char *to_dir);
  250. int compare_proc_modules(const char *from, const char *to);
  251. int setup_list(struct strlist **list, const char *list_str,
  252. const char *list_name);
  253. #endif /* __PERF_SYMBOL */