1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __PERF_EVLIST_H 3 #define __PERF_EVLIST_H 1 4 5 #include <linux/compiler.h> 6 #include <linux/kernel.h> 7 #include <linux/refcount.h> 8 #include <linux/list.h> 9 #include <api/fd/array.h> 10 #include <internal/evlist.h> 11 #include <internal/evsel.h> 12 #include "events_stats.h" 13 #include "evsel.h" 14 #include <pthread.h> 15 #include <signal.h> 16 #include <unistd.h> 17 18 struct pollfd; 19 struct thread_map; 20 struct perf_cpu_map; 21 struct record_opts; 22 23 /* 24 * State machine of bkw_mmap_state: 25 * 26 * .________________(forbid)_____________. 27 * | V 28 * NOTREADY --(0)--> RUNNING --(1)--> DATA_PENDING --(2)--> EMPTY 29 * ^ ^ | ^ | 30 * | |__(forbid)____/ |___(forbid)___/| 31 * | | 32 * \_________________(3)_______________/ 33 * 34 * NOTREADY : Backward ring buffers are not ready 35 * RUNNING : Backward ring buffers are recording 36 * DATA_PENDING : We are required to collect data from backward ring buffers 37 * EMPTY : We have collected data from backward ring buffers. 38 * 39 * (0): Setup backward ring buffer 40 * (1): Pause ring buffers for reading 41 * (2): Read from ring buffers 42 * (3): Resume ring buffers for recording 43 */ 44 enum bkw_mmap_state { 45 BKW_MMAP_NOTREADY, 46 BKW_MMAP_RUNNING, 47 BKW_MMAP_DATA_PENDING, 48 BKW_MMAP_EMPTY, 49 }; 50 51 struct evlist { 52 struct perf_evlist core; 53 int nr_groups; 54 bool enabled; 55 int id_pos; 56 int is_pos; 57 u64 combined_sample_type; 58 enum bkw_mmap_state bkw_mmap_state; 59 struct { 60 int cork_fd; 61 pid_t pid; 62 } workload; 63 struct mmap *mmap; 64 struct mmap *overwrite_mmap; 65 struct evsel *selected; 66 struct events_stats stats; 67 struct perf_env *env; 68 void (*trace_event_sample_raw)(struct evlist *evlist, 69 union perf_event *event, 70 struct perf_sample *sample); 71 u64 first_sample_time; 72 u64 last_sample_time; 73 struct { 74 pthread_t th; 75 volatile int done; 76 } thread; 77 struct { 78 int fd; /* control file descriptor */ 79 int ack; /* ack file descriptor for control commands */ 80 int pos; /* index at evlist core object to check signals */ 81 } ctl_fd; 82 }; 83 84 struct evsel_str_handler { 85 const char *name; 86 void *handler; 87 }; 88 89 struct evlist *evlist__new(void); 90 struct evlist *evlist__new_default(void); 91 struct evlist *evlist__new_dummy(void); 92 void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, 93 struct perf_thread_map *threads); 94 void evlist__exit(struct evlist *evlist); 95 void evlist__delete(struct evlist *evlist); 96 97 void evlist__add(struct evlist *evlist, struct evsel *entry); 98 void evlist__remove(struct evlist *evlist, struct evsel *evsel); 99 100 int __evlist__add_default(struct evlist *evlist, bool precise); 101 102 static inline int evlist__add_default(struct evlist *evlist) 103 { 104 return __evlist__add_default(evlist, true); 105 } 106 107 int __evlist__add_default_attrs(struct evlist *evlist, 108 struct perf_event_attr *attrs, size_t nr_attrs); 109 110 #define evlist__add_default_attrs(evlist, array) \ 111 __evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array)) 112 113 int arch_evlist__add_default_attrs(struct evlist *evlist); 114 115 int evlist__add_dummy(struct evlist *evlist); 116 117 int evlist__add_sb_event(struct evlist *evlist, struct perf_event_attr *attr, 118 evsel__sb_cb_t cb, void *data); 119 void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data); 120 int evlist__start_sb_thread(struct evlist *evlist, struct target *target); 121 void evlist__stop_sb_thread(struct evlist *evlist); 122 123 int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler); 124 125 int __evlist__set_tracepoints_handlers(struct evlist *evlist, 126 const struct evsel_str_handler *assocs, 127 size_t nr_assocs); 128 129 #define evlist__set_tracepoints_handlers(evlist, array) \ 130 __evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array)) 131 132 int evlist__set_tp_filter(struct evlist *evlist, const char *filter); 133 int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid); 134 int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 135 136 int evlist__append_tp_filter(struct evlist *evlist, const char *filter); 137 138 int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid); 139 int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 140 141 struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id); 142 struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name); 143 144 int evlist__add_pollfd(struct evlist *evlist, int fd); 145 int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask); 146 147 #ifdef HAVE_EVENTFD_SUPPORT 148 int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd); 149 #endif 150 151 int evlist__poll(struct evlist *evlist, int timeout); 152 153 struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id); 154 struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id); 155 156 struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id); 157 158 void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state); 159 160 void evlist__mmap_consume(struct evlist *evlist, int idx); 161 162 int evlist__open(struct evlist *evlist); 163 void evlist__close(struct evlist *evlist); 164 165 struct callchain_param; 166 167 void evlist__set_id_pos(struct evlist *evlist); 168 void evlist__config(struct evlist *evlist, struct record_opts *opts, struct callchain_param *callchain); 169 int record_opts__config(struct record_opts *opts); 170 171 int evlist__prepare_workload(struct evlist *evlist, struct target *target, 172 const char *argv[], bool pipe_output, 173 void (*exec_error)(int signo, siginfo_t *info, void *ucontext)); 174 int evlist__start_workload(struct evlist *evlist); 175 176 struct option; 177 178 int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); 179 int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset); 180 181 unsigned long perf_event_mlock_kb_in_pages(void); 182 183 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, 184 unsigned int auxtrace_pages, 185 bool auxtrace_overwrite, int nr_cblocks, 186 int affinity, int flush, int comp_level); 187 int evlist__mmap(struct evlist *evlist, unsigned int pages); 188 void evlist__munmap(struct evlist *evlist); 189 190 size_t evlist__mmap_size(unsigned long pages); 191 192 void evlist__disable(struct evlist *evlist); 193 void evlist__enable(struct evlist *evlist); 194 void evlist__toggle_enable(struct evlist *evlist); 195 void evlist__disable_evsel(struct evlist *evlist, char *evsel_name); 196 void evlist__enable_evsel(struct evlist *evlist, char *evsel_name); 197 198 int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel, int idx); 199 200 void evlist__set_selected(struct evlist *evlist, struct evsel *evsel); 201 202 int evlist__create_maps(struct evlist *evlist, struct target *target); 203 int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel); 204 205 void __evlist__set_leader(struct list_head *list); 206 void evlist__set_leader(struct evlist *evlist); 207 208 u64 __evlist__combined_sample_type(struct evlist *evlist); 209 u64 evlist__combined_sample_type(struct evlist *evlist); 210 u64 evlist__combined_branch_type(struct evlist *evlist); 211 bool evlist__sample_id_all(struct evlist *evlist); 212 u16 evlist__id_hdr_size(struct evlist *evlist); 213 214 int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample); 215 int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp); 216 217 bool evlist__valid_sample_type(struct evlist *evlist); 218 bool evlist__valid_sample_id_all(struct evlist *evlist); 219 bool evlist__valid_read_format(struct evlist *evlist); 220 221 void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list); 222 223 static inline bool evlist__empty(struct evlist *evlist) 224 { 225 return list_empty(&evlist->core.entries); 226 } 227 228 static inline struct evsel *evlist__first(struct evlist *evlist) 229 { 230 struct perf_evsel *evsel = perf_evlist__first(&evlist->core); 231 232 return container_of(evsel, struct evsel, core); 233 } 234 235 static inline struct evsel *evlist__last(struct evlist *evlist) 236 { 237 struct perf_evsel *evsel = perf_evlist__last(&evlist->core); 238 239 return container_of(evsel, struct evsel, core); 240 } 241 242 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size); 243 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size); 244 245 bool evlist__can_select_event(struct evlist *evlist, const char *str); 246 void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel); 247 248 /** 249 * __evlist__for_each_entry - iterate thru all the evsels 250 * @list: list_head instance to iterate 251 * @evsel: struct evsel iterator 252 */ 253 #define __evlist__for_each_entry(list, evsel) \ 254 list_for_each_entry(evsel, list, core.node) 255 256 /** 257 * evlist__for_each_entry - iterate thru all the evsels 258 * @evlist: evlist instance to iterate 259 * @evsel: struct evsel iterator 260 */ 261 #define evlist__for_each_entry(evlist, evsel) \ 262 __evlist__for_each_entry(&(evlist)->core.entries, evsel) 263 264 /** 265 * __evlist__for_each_entry_continue - continue iteration thru all the evsels 266 * @list: list_head instance to iterate 267 * @evsel: struct evsel iterator 268 */ 269 #define __evlist__for_each_entry_continue(list, evsel) \ 270 list_for_each_entry_continue(evsel, list, core.node) 271 272 /** 273 * evlist__for_each_entry_continue - continue iteration thru all the evsels 274 * @evlist: evlist instance to iterate 275 * @evsel: struct evsel iterator 276 */ 277 #define evlist__for_each_entry_continue(evlist, evsel) \ 278 __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel) 279 280 /** 281 * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 282 * @list: list_head instance to iterate 283 * @evsel: struct evsel iterator 284 */ 285 #define __evlist__for_each_entry_reverse(list, evsel) \ 286 list_for_each_entry_reverse(evsel, list, core.node) 287 288 /** 289 * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 290 * @evlist: evlist instance to iterate 291 * @evsel: struct evsel iterator 292 */ 293 #define evlist__for_each_entry_reverse(evlist, evsel) \ 294 __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel) 295 296 /** 297 * __evlist__for_each_entry_safe - safely iterate thru all the evsels 298 * @list: list_head instance to iterate 299 * @tmp: struct evsel temp iterator 300 * @evsel: struct evsel iterator 301 */ 302 #define __evlist__for_each_entry_safe(list, tmp, evsel) \ 303 list_for_each_entry_safe(evsel, tmp, list, core.node) 304 305 /** 306 * evlist__for_each_entry_safe - safely iterate thru all the evsels 307 * @evlist: evlist instance to iterate 308 * @evsel: struct evsel iterator 309 * @tmp: struct evsel temp iterator 310 */ 311 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \ 312 __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel) 313 314 #define evlist__for_each_cpu(evlist, index, cpu) \ 315 evlist__cpu_iter_start(evlist); \ 316 perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus) 317 318 struct evsel *evlist__get_tracking_event(struct evlist *evlist); 319 void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel); 320 321 void evlist__cpu_iter_start(struct evlist *evlist); 322 bool evsel__cpu_iter_skip(struct evsel *ev, int cpu); 323 bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu); 324 325 struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str); 326 327 struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event); 328 329 bool evlist__exclude_kernel(struct evlist *evlist); 330 331 void evlist__force_leader(struct evlist *evlist); 332 333 struct evsel *evlist__reset_weak_group(struct evlist *evlist, struct evsel *evsel, bool close); 334 335 #define EVLIST_CTL_CMD_ENABLE_TAG "enable" 336 #define EVLIST_CTL_CMD_DISABLE_TAG "disable" 337 #define EVLIST_CTL_CMD_ACK_TAG "ack\n" 338 #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot" 339 #define EVLIST_CTL_CMD_EVLIST_TAG "evlist" 340 #define EVLIST_CTL_CMD_STOP_TAG "stop" 341 #define EVLIST_CTL_CMD_PING_TAG "ping" 342 343 #define EVLIST_CTL_CMD_MAX_LEN 64 344 345 enum evlist_ctl_cmd { 346 EVLIST_CTL_CMD_UNSUPPORTED = 0, 347 EVLIST_CTL_CMD_ENABLE, 348 EVLIST_CTL_CMD_DISABLE, 349 EVLIST_CTL_CMD_ACK, 350 EVLIST_CTL_CMD_SNAPSHOT, 351 EVLIST_CTL_CMD_EVLIST, 352 EVLIST_CTL_CMD_STOP, 353 EVLIST_CTL_CMD_PING, 354 }; 355 356 int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close); 357 void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close); 358 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); 359 int evlist__finalize_ctlfd(struct evlist *evlist); 360 bool evlist__ctlfd_initialized(struct evlist *evlist); 361 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); 362 int evlist__ctlfd_ack(struct evlist *evlist); 363 364 #define EVLIST_ENABLED_MSG "Events enabled\n" 365 #define EVLIST_DISABLED_MSG "Events disabled\n" 366 367 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx); 368 369 int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf); 370 #endif /* __PERF_EVLIST_H */ 371