tools/perf/util/map.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_MAP_H
   3 #define __PERF_MAP_H
   4
   5 #include <linux/refcount.h>
   6 #include <linux/compiler.h>
   7 #include <linux/list.h>
   8 #include <linux/rbtree.h>
   9 #include <pthread.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <stdbool.h>
  13 #include <linux/types.h>
  14 #include "rwsem.h"
  15
  16 struct dso;
  17 struct ip_callchain;
  18 struct ref_reloc_sym;
  19 struct map_groups;
  20 struct machine;
  21 struct perf_evsel;
  22
  23 struct map {
  24         union {
  25                 struct rb_node  rb_node;
  26                 struct list_head node;
  27         };
  28         u64                     start;
  29         u64                     end;
  30         bool                    erange_warned;
  31         u32                     priv;
  32         u32                     prot;
  33         u32                     flags;
  34         u64                     pgoff;
  35         u64                     reloc;
  36         u32                     maj, min; /* only valid for MMAP2 record */
  37         u64                     ino;      /* only valid for MMAP2 record */
  38         u64                     ino_generation;/* only valid for MMAP2 record */
  39
  40         /* ip -> dso rip */
  41         u64                     (*map_ip)(struct map *, u64);
  42         /* dso rip -> ip */
  43         u64                     (*unmap_ip)(struct map *, u64);
  44
  45         struct dso              *dso;
  46         struct map_groups       *groups;
  47         refcount_t              refcnt;
  48 };
  49
  50 #define KMAP_NAME_LEN 256
  51
  52 struct kmap {
  53         struct ref_reloc_sym    *ref_reloc_sym;
  54         struct map_groups       *kmaps;
  55         char                    name[KMAP_NAME_LEN];
  56 };
  57
  58 struct maps {
  59         struct rb_root   entries;
  60         struct rw_semaphore lock;
  61 };
  62
  63 struct map_groups {
  64         struct maps      maps;
  65         struct machine   *machine;
  66         refcount_t       refcnt;
  67 };
  68
  69 struct map_groups *map_groups__new(struct machine *machine);
  70 void map_groups__delete(struct map_groups *mg);
  71 bool map_groups__empty(struct map_groups *mg);
  72
  73 static inline struct map_groups *map_groups__get(struct map_groups *mg)
  74 {
  75         if (mg)
  76                 refcount_inc(&mg->refcnt);
  77         return mg;
  78 }
  79
  80 void map_groups__put(struct map_groups *mg);
  81
  82 struct kmap *__map__kmap(struct map *map);
  83 struct kmap *map__kmap(struct map *map);
  84 struct map_groups *map__kmaps(struct map *map);
  85
  86 static inline u64 map__map_ip(struct map *map, u64 ip)
  87 {
  88         return ip - map->start + map->pgoff;
  89 }
  90
  91 static inline u64 map__unmap_ip(struct map *map, u64 ip)
  92 {
  93         return ip + map->start - map->pgoff;
  94 }
  95
  96 static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
  97 {
  98         return ip;
  99 }
 100
 101 static inline size_t map__size(const struct map *map)
 102 {
 103         return map->end - map->start;
 104 }
 105
 106 /* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
 107 u64 map__rip_2objdump(struct map *map, u64 rip);
 108
 109 /* objdump address -> memory address */
 110 u64 map__objdump_2mem(struct map *map, u64 ip);
 111
 112 struct symbol;
 113 struct thread;
 114
 115 /* map__for_each_symbol - iterate over the symbols in the given map
 116  *
 117  * @map: the 'struct map *' in which symbols itereated
 118  * @pos: the 'struct symbol *' to use as a loop cursor
 119  * @n: the 'struct rb_node *' to use as a temporary storage
 120  * Note: caller must ensure map->dso is not NULL (map is loaded).
 121  */
 122 #define map__for_each_symbol(map, pos, n)       \
 123         dso__for_each_symbol(map->dso, pos, n)
 124
 125 /* map__for_each_symbol_with_name - iterate over the symbols in the given map
 126  *                                  that have the given name
 127  *
 128  * @map: the 'struct map *' in which symbols itereated
 129  * @sym_name: the symbol name
 130  * @pos: the 'struct symbol *' to use as a loop cursor
 131  */
 132 #define __map__for_each_symbol_by_name(map, sym_name, pos)      \
 133         for (pos = map__find_symbol_by_name(map, sym_name);     \
 134              pos &&                                             \
 135              !symbol__match_symbol_name(pos->name, sym_name,    \
 136                                         SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); \
 137              pos = symbol__next_by_name(pos))
 138
 139 #define map__for_each_symbol_by_name(map, sym_name, pos)                \
 140         __map__for_each_symbol_by_name(map, sym_name, (pos))
 141
 142 void map__init(struct map *map,
 143                u64 start, u64 end, u64 pgoff, struct dso *dso);
 144 struct map *map__new(struct machine *machine, u64 start, u64 len,
 145                      u64 pgoff, u32 d_maj, u32 d_min, u64 ino,
 146                      u64 ino_gen, u32 prot, u32 flags,
 147                      char *filename, struct thread *thread);
 148 struct map *map__new2(u64 start, struct dso *dso);
 149 void map__delete(struct map *map);
 150 struct map *map__clone(struct map *map);
 151
 152 static inline struct map *map__get(struct map *map)
 153 {
 154         if (map)
 155                 refcount_inc(&map->refcnt);
 156         return map;
 157 }
 158
 159 void map__put(struct map *map);
 160
 161 static inline void __map__zput(struct map **map)
 162 {
 163         map__put(*map);
 164         *map = NULL;
 165 }
 166
 167 #define map__zput(map) __map__zput(&map)
 168
 169 size_t map__fprintf(struct map *map, FILE *fp);
 170 size_t map__fprintf_dsoname(struct map *map, FILE *fp);
 171 char *map__srcline(struct map *map, u64 addr, struct symbol *sym);
 172 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
 173                          FILE *fp);
 174
 175 int map__load(struct map *map);
 176 struct symbol *map__find_symbol(struct map *map, u64 addr);
 177 struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
 178 void map__fixup_start(struct map *map);
 179 void map__fixup_end(struct map *map);
 180
 181 void map__reloc_vmlinux(struct map *map);
 182
 183 void maps__insert(struct maps *maps, struct map *map);
 184 void maps__remove(struct maps *maps, struct map *map);
 185 struct map *maps__find(struct maps *maps, u64 addr);
 186 struct map *maps__first(struct maps *maps);
 187 struct map *map__next(struct map *map);
 188 struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
 189                                          struct map **mapp);
 190 void map_groups__init(struct map_groups *mg, struct machine *machine);
 191 void map_groups__exit(struct map_groups *mg);
 192 int map_groups__clone(struct thread *thread,
 193                       struct map_groups *parent);
 194 size_t map_groups__fprintf(struct map_groups *mg, FILE *fp);
 195
 196 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
 197                                     u64 addr);
 198
 199 static inline void map_groups__insert(struct map_groups *mg, struct map *map)
 200 {
 201         maps__insert(&mg->maps, map);
 202         map->groups = mg;
 203 }
 204
 205 static inline void map_groups__remove(struct map_groups *mg, struct map *map)
 206 {
 207         maps__remove(&mg->maps, map);
 208 }
 209
 210 static inline struct map *map_groups__find(struct map_groups *mg, u64 addr)
 211 {
 212         return maps__find(&mg->maps, addr);
 213 }
 214
 215 struct map *map_groups__first(struct map_groups *mg);
 216
 217 static inline struct map *map_groups__next(struct map *map)
 218 {
 219         return map__next(map);
 220 }
 221
 222 struct symbol *map_groups__find_symbol(struct map_groups *mg,
 223                                        u64 addr, struct map **mapp);
 224
 225 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
 226                                                const char *name,
 227                                                struct map **mapp);
 228
 229 struct addr_map_symbol;
 230
 231 int map_groups__find_ams(struct addr_map_symbol *ams);
 232
 233 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
 234                                    FILE *fp);
 235
 236 struct map *map_groups__find_by_name(struct map_groups *mg, const char *name);
 237
 238 bool __map__is_kernel(const struct map *map);
 239 bool __map__is_extra_kernel_map(const struct map *map);
 240
 241 static inline bool __map__is_kmodule(const struct map *map)
 242 {
 243         return !__map__is_kernel(map) && !__map__is_extra_kernel_map(map);
 244 }
 245
 246 bool map__has_symbols(const struct map *map);
 247
 248 #define ENTRY_TRAMPOLINE_NAME "__entry_SYSCALL_64_trampoline"
 249
 250 static inline bool is_entry_trampoline(const char *name)
 251 {
 252         return !strcmp(name, ENTRY_TRAMPOLINE_NAME);
 253 }
 254
 255 #endif /* __PERF_MAP_H */