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TOMOYO Linux Cross Reference
Linux/tools/perf/util/map.h

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  1 #ifndef __PERF_MAP_H
  2 #define __PERF_MAP_H
  3 
  4 #include <linux/atomic.h>
  5 #include <linux/compiler.h>
  6 #include <linux/list.h>
  7 #include <linux/rbtree.h>
  8 #include <pthread.h>
  9 #include <stdio.h>
 10 #include <stdbool.h>
 11 #include <linux/types.h>
 12 
 13 enum map_type {
 14         MAP__FUNCTION = 0,
 15         MAP__VARIABLE,
 16 };
 17 
 18 #define MAP__NR_TYPES (MAP__VARIABLE + 1)
 19 
 20 extern const char *map_type__name[MAP__NR_TYPES];
 21 
 22 struct dso;
 23 struct ip_callchain;
 24 struct ref_reloc_sym;
 25 struct map_groups;
 26 struct machine;
 27 struct perf_evsel;
 28 
 29 struct map {
 30         union {
 31                 struct rb_node  rb_node;
 32                 struct list_head node;
 33         };
 34         u64                     start;
 35         u64                     end;
 36         u8 /* enum map_type */  type;
 37         bool                    erange_warned;
 38         u32                     priv;
 39         u32                     prot;
 40         u32                     flags;
 41         u64                     pgoff;
 42         u64                     reloc;
 43         u32                     maj, min; /* only valid for MMAP2 record */
 44         u64                     ino;      /* only valid for MMAP2 record */
 45         u64                     ino_generation;/* only valid for MMAP2 record */
 46 
 47         /* ip -> dso rip */
 48         u64                     (*map_ip)(struct map *, u64);
 49         /* dso rip -> ip */
 50         u64                     (*unmap_ip)(struct map *, u64);
 51 
 52         struct dso              *dso;
 53         struct map_groups       *groups;
 54         atomic_t                refcnt;
 55 };
 56 
 57 struct kmap {
 58         struct ref_reloc_sym    *ref_reloc_sym;
 59         struct map_groups       *kmaps;
 60 };
 61 
 62 struct maps {
 63         struct rb_root   entries;
 64         pthread_rwlock_t lock;
 65 };
 66 
 67 struct map_groups {
 68         struct maps      maps[MAP__NR_TYPES];
 69         struct machine   *machine;
 70         atomic_t         refcnt;
 71 };
 72 
 73 struct map_groups *map_groups__new(struct machine *machine);
 74 void map_groups__delete(struct map_groups *mg);
 75 bool map_groups__empty(struct map_groups *mg);
 76 
 77 static inline struct map_groups *map_groups__get(struct map_groups *mg)
 78 {
 79         if (mg)
 80                 atomic_inc(&mg->refcnt);
 81         return mg;
 82 }
 83 
 84 void map_groups__put(struct map_groups *mg);
 85 
 86 struct kmap *map__kmap(struct map *map);
 87 struct map_groups *map__kmaps(struct map *map);
 88 
 89 static inline u64 map__map_ip(struct map *map, u64 ip)
 90 {
 91         return ip - map->start + map->pgoff;
 92 }
 93 
 94 static inline u64 map__unmap_ip(struct map *map, u64 ip)
 95 {
 96         return ip + map->start - map->pgoff;
 97 }
 98 
 99 static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
100 {
101         return ip;
102 }
103 
104 
105 /* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
106 u64 map__rip_2objdump(struct map *map, u64 rip);
107 
108 /* objdump address -> memory address */
109 u64 map__objdump_2mem(struct map *map, u64 ip);
110 
111 struct symbol;
112 struct thread;
113 
114 /* map__for_each_symbol - iterate over the symbols in the given map
115  *
116  * @map: the 'struct map *' in which symbols itereated
117  * @pos: the 'struct symbol *' to use as a loop cursor
118  * @n: the 'struct rb_node *' to use as a temporary storage
119  * Note: caller must ensure map->dso is not NULL (map is loaded).
120  */
121 #define map__for_each_symbol(map, pos, n)       \
122         dso__for_each_symbol(map->dso, pos, n, map->type)
123 
124 /* map__for_each_symbol_with_name - iterate over the symbols in the given map
125  *                                  that have the given name
126  *
127  * @map: the 'struct map *' in which symbols itereated
128  * @sym_name: the symbol name
129  * @pos: the 'struct symbol *' to use as a loop cursor
130  * @filter: to use when loading the DSO
131  */
132 #define __map__for_each_symbol_by_name(map, sym_name, pos, filter)      \
133         for (pos = map__find_symbol_by_name(map, sym_name, filter);     \
134              pos && arch__compare_symbol_names(pos->name, sym_name) == 0;       \
135              pos = symbol__next_by_name(pos))
136 
137 #define map__for_each_symbol_by_name(map, sym_name, pos)                \
138         __map__for_each_symbol_by_name(map, sym_name, (pos), NULL)
139 
140 typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
141 
142 int arch__compare_symbol_names(const char *namea, const char *nameb);
143 void map__init(struct map *map, enum map_type type,
144                u64 start, u64 end, u64 pgoff, struct dso *dso);
145 struct map *map__new(struct machine *machine, u64 start, u64 len,
146                      u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
147                      u64 ino_gen, u32 prot, u32 flags,
148                      char *filename, enum map_type type, struct thread *thread);
149 struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
150 void map__delete(struct map *map);
151 struct map *map__clone(struct map *map);
152 
153 static inline struct map *map__get(struct map *map)
154 {
155         if (map)
156                 atomic_inc(&map->refcnt);
157         return map;
158 }
159 
160 void map__put(struct map *map);
161 
162 static inline void __map__zput(struct map **map)
163 {
164         map__put(*map);
165         *map = NULL;
166 }
167 
168 #define map__zput(map) __map__zput(&map)
169 
170 int map__overlap(struct map *l, struct map *r);
171 size_t map__fprintf(struct map *map, FILE *fp);
172 size_t map__fprintf_dsoname(struct map *map, FILE *fp);
173 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
174                          FILE *fp);
175 
176 int map__load(struct map *map, symbol_filter_t filter);
177 struct symbol *map__find_symbol(struct map *map,
178                                 u64 addr, symbol_filter_t filter);
179 struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
180                                         symbol_filter_t filter);
181 void map__fixup_start(struct map *map);
182 void map__fixup_end(struct map *map);
183 
184 void map__reloc_vmlinux(struct map *map);
185 
186 size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
187                                   FILE *fp);
188 void maps__insert(struct maps *maps, struct map *map);
189 void maps__remove(struct maps *maps, struct map *map);
190 struct map *maps__find(struct maps *maps, u64 addr);
191 struct map *maps__first(struct maps *maps);
192 struct map *map__next(struct map *map);
193 struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
194                                          struct map **mapp, symbol_filter_t filter);
195 void map_groups__init(struct map_groups *mg, struct machine *machine);
196 void map_groups__exit(struct map_groups *mg);
197 int map_groups__clone(struct map_groups *mg,
198                       struct map_groups *parent, enum map_type type);
199 size_t map_groups__fprintf(struct map_groups *mg, FILE *fp);
200 
201 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, const char *symbol_name,
202                                      u64 addr);
203 
204 static inline void map_groups__insert(struct map_groups *mg, struct map *map)
205 {
206         maps__insert(&mg->maps[map->type], map);
207         map->groups = mg;
208 }
209 
210 static inline void map_groups__remove(struct map_groups *mg, struct map *map)
211 {
212         maps__remove(&mg->maps[map->type], map);
213 }
214 
215 static inline struct map *map_groups__find(struct map_groups *mg,
216                                            enum map_type type, u64 addr)
217 {
218         return maps__find(&mg->maps[type], addr);
219 }
220 
221 static inline struct map *map_groups__first(struct map_groups *mg,
222                                             enum map_type type)
223 {
224         return maps__first(&mg->maps[type]);
225 }
226 
227 static inline struct map *map_groups__next(struct map *map)
228 {
229         return map__next(map);
230 }
231 
232 struct symbol *map_groups__find_symbol(struct map_groups *mg,
233                                        enum map_type type, u64 addr,
234                                        struct map **mapp,
235                                        symbol_filter_t filter);
236 
237 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
238                                                enum map_type type,
239                                                const char *name,
240                                                struct map **mapp,
241                                                symbol_filter_t filter);
242 
243 struct addr_map_symbol;
244 
245 int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter);
246 
247 static inline
248 struct symbol *map_groups__find_function_by_name(struct map_groups *mg,
249                                                  const char *name, struct map **mapp,
250                                                  symbol_filter_t filter)
251 {
252         return map_groups__find_symbol_by_name(mg, MAP__FUNCTION, name, mapp, filter);
253 }
254 
255 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
256                                    FILE *fp);
257 
258 struct map *map_groups__find_by_name(struct map_groups *mg,
259                                      enum map_type type, const char *name);
260 
261 bool __map__is_kernel(const struct map *map);
262 
263 static inline bool __map__is_kmodule(const struct map *map)
264 {
265         return !__map__is_kernel(map);
266 }
267 
268 #endif /* __PERF_MAP_H */
269 

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