1 // SPDX-License-Identifier: GPL-2.0 2 #include <dirent.h> 3 #include <errno.h> 4 #include <stdio.h> 5 #include <stdlib.h> 6 #include <string.h> 7 #include <sys/param.h> 8 9 #include <api/fs/tracing_path.h> 10 #include <linux/stddef.h> 11 #include <linux/perf_event.h> 12 #include <linux/zalloc.h> 13 #include <subcmd/pager.h> 14 15 #include "build-id.h" 16 #include "debug.h" 17 #include "evsel.h" 18 #include "metricgroup.h" 19 #include "parse-events.h" 20 #include "pmu.h" 21 #include "print-events.h" 22 #include "probe-file.h" 23 #include "string2.h" 24 #include "strlist.h" 25 #include "tracepoint.h" 26 #include "pfm.h" 27 #include "pmu-hybrid.h" 28 29 #define MAX_NAME_LEN 100 30 31 /** Strings corresponding to enum perf_type_id. */ 32 static const char * const event_type_descriptors[] = { 33 "Hardware event", 34 "Software event", 35 "Tracepoint event", 36 "Hardware cache event", 37 "Raw hardware event descriptor", 38 "Hardware breakpoint", 39 }; 40 41 static const struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = { 42 [PERF_TOOL_DURATION_TIME] = { 43 .symbol = "duration_time", 44 .alias = "", 45 }, 46 [PERF_TOOL_USER_TIME] = { 47 .symbol = "user_time", 48 .alias = "", 49 }, 50 [PERF_TOOL_SYSTEM_TIME] = { 51 .symbol = "system_time", 52 .alias = "", 53 }, 54 }; 55 56 /* 57 * Print the events from <debugfs_mount_point>/tracing/events 58 */ 59 void print_tracepoint_events(const struct print_callbacks *print_cb, void *print_state) 60 { 61 struct dirent **sys_namelist = NULL; 62 int sys_items = tracing_events__scandir_alphasort(&sys_namelist); 63 64 for (int i = 0; i < sys_items; i++) { 65 struct dirent *sys_dirent = sys_namelist[i]; 66 struct dirent **evt_namelist = NULL; 67 char *dir_path; 68 int evt_items; 69 70 if (sys_dirent->d_type != DT_DIR || 71 !strcmp(sys_dirent->d_name, ".") || 72 !strcmp(sys_dirent->d_name, "..")) 73 continue; 74 75 dir_path = get_events_file(sys_dirent->d_name); 76 if (!dir_path) 77 continue; 78 79 evt_items = scandir(dir_path, &evt_namelist, NULL, alphasort); 80 for (int j = 0; j < evt_items; j++) { 81 struct dirent *evt_dirent = evt_namelist[j]; 82 char evt_path[MAXPATHLEN]; 83 84 if (evt_dirent->d_type != DT_DIR || 85 !strcmp(evt_dirent->d_name, ".") || 86 !strcmp(evt_dirent->d_name, "..")) 87 continue; 88 89 if (tp_event_has_id(dir_path, evt_dirent) != 0) 90 continue; 91 92 snprintf(evt_path, MAXPATHLEN, "%s:%s", 93 sys_dirent->d_name, evt_dirent->d_name); 94 print_cb->print_event(print_state, 95 /*topic=*/NULL, 96 /*pmu_name=*/NULL, 97 evt_path, 98 /*event_alias=*/NULL, 99 /*scale_unit=*/NULL, 100 /*deprecated=*/false, 101 "Tracepoint event", 102 /*desc=*/NULL, 103 /*long_desc=*/NULL, 104 /*encoding_desc=*/NULL); 105 } 106 free(dir_path); 107 free(evt_namelist); 108 } 109 free(sys_namelist); 110 } 111 112 void print_sdt_events(const struct print_callbacks *print_cb, void *print_state) 113 { 114 struct strlist *bidlist, *sdtlist; 115 struct str_node *bid_nd, *sdt_name, *next_sdt_name; 116 const char *last_sdt_name = NULL; 117 118 /* 119 * The implicitly sorted sdtlist will hold the tracepoint name followed 120 * by @<buildid>. If the tracepoint name is unique (determined by 121 * looking at the adjacent nodes) the @<buildid> is dropped otherwise 122 * the executable path and buildid are added to the name. 123 */ 124 sdtlist = strlist__new(NULL, NULL); 125 if (!sdtlist) { 126 pr_debug("Failed to allocate new strlist for SDT\n"); 127 return; 128 } 129 bidlist = build_id_cache__list_all(true); 130 if (!bidlist) { 131 pr_debug("Failed to get buildids: %d\n", errno); 132 return; 133 } 134 strlist__for_each_entry(bid_nd, bidlist) { 135 struct probe_cache *pcache; 136 struct probe_cache_entry *ent; 137 138 pcache = probe_cache__new(bid_nd->s, NULL); 139 if (!pcache) 140 continue; 141 list_for_each_entry(ent, &pcache->entries, node) { 142 char buf[1024]; 143 144 snprintf(buf, sizeof(buf), "%s:%s@%s", 145 ent->pev.group, ent->pev.event, bid_nd->s); 146 strlist__add(sdtlist, buf); 147 } 148 probe_cache__delete(pcache); 149 } 150 strlist__delete(bidlist); 151 152 strlist__for_each_entry(sdt_name, sdtlist) { 153 bool show_detail = false; 154 char *bid = strchr(sdt_name->s, '@'); 155 char *evt_name = NULL; 156 157 if (bid) 158 *(bid++) = '\0'; 159 160 if (last_sdt_name && !strcmp(last_sdt_name, sdt_name->s)) { 161 show_detail = true; 162 } else { 163 next_sdt_name = strlist__next(sdt_name); 164 if (next_sdt_name) { 165 char *bid2 = strchr(next_sdt_name->s, '@'); 166 167 if (bid2) 168 *bid2 = '\0'; 169 if (strcmp(sdt_name->s, next_sdt_name->s) == 0) 170 show_detail = true; 171 if (bid2) 172 *bid2 = '@'; 173 } 174 } 175 last_sdt_name = sdt_name->s; 176 177 if (show_detail) { 178 char *path = build_id_cache__origname(bid); 179 180 if (path) { 181 if (asprintf(&evt_name, "%s@%s(%.12s)", sdt_name->s, path, bid) < 0) 182 evt_name = NULL; 183 free(path); 184 } 185 } 186 print_cb->print_event(print_state, 187 /*topic=*/NULL, 188 /*pmu_name=*/NULL, 189 evt_name ?: sdt_name->s, 190 /*event_alias=*/NULL, 191 /*deprecated=*/false, 192 /*scale_unit=*/NULL, 193 "SDT event", 194 /*desc=*/NULL, 195 /*long_desc=*/NULL, 196 /*encoding_desc=*/NULL); 197 198 free(evt_name); 199 } 200 strlist__delete(sdtlist); 201 } 202 203 int print_hwcache_events(const struct print_callbacks *print_cb, void *print_state) 204 { 205 struct strlist *evt_name_list = strlist__new(NULL, NULL); 206 struct str_node *nd; 207 208 if (!evt_name_list) { 209 pr_debug("Failed to allocate new strlist for hwcache events\n"); 210 return -ENOMEM; 211 } 212 for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { 213 for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { 214 /* skip invalid cache type */ 215 if (!evsel__is_cache_op_valid(type, op)) 216 continue; 217 218 for (int i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { 219 struct perf_pmu *pmu = NULL; 220 char name[64]; 221 222 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name)); 223 if (!perf_pmu__has_hybrid()) { 224 if (is_event_supported(PERF_TYPE_HW_CACHE, 225 type | (op << 8) | (i << 16))) 226 strlist__add(evt_name_list, name); 227 continue; 228 } 229 perf_pmu__for_each_hybrid_pmu(pmu) { 230 if (is_event_supported(PERF_TYPE_HW_CACHE, 231 type | (op << 8) | (i << 16) | 232 ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT))) { 233 char new_name[128]; 234 snprintf(new_name, sizeof(new_name), 235 "%s/%s/", pmu->name, name); 236 strlist__add(evt_name_list, new_name); 237 } 238 } 239 } 240 } 241 } 242 243 strlist__for_each_entry(nd, evt_name_list) { 244 print_cb->print_event(print_state, 245 "cache", 246 /*pmu_name=*/NULL, 247 nd->s, 248 /*event_alias=*/NULL, 249 /*scale_unit=*/NULL, 250 /*deprecated=*/false, 251 event_type_descriptors[PERF_TYPE_HW_CACHE], 252 /*desc=*/NULL, 253 /*long_desc=*/NULL, 254 /*encoding_desc=*/NULL); 255 } 256 strlist__delete(evt_name_list); 257 return 0; 258 } 259 260 void print_tool_events(const struct print_callbacks *print_cb, void *print_state) 261 { 262 // Start at 1 because the first enum entry means no tool event. 263 for (int i = 1; i < PERF_TOOL_MAX; ++i) { 264 print_cb->print_event(print_state, 265 "tool", 266 /*pmu_name=*/NULL, 267 event_symbols_tool[i].symbol, 268 event_symbols_tool[i].alias, 269 /*scale_unit=*/NULL, 270 /*deprecated=*/false, 271 "Tool event", 272 /*desc=*/NULL, 273 /*long_desc=*/NULL, 274 /*encoding_desc=*/NULL); 275 } 276 } 277 278 void print_symbol_events(const struct print_callbacks *print_cb, void *print_state, 279 unsigned int type, const struct event_symbol *syms, 280 unsigned int max) 281 { 282 struct strlist *evt_name_list = strlist__new(NULL, NULL); 283 struct str_node *nd; 284 285 if (!evt_name_list) { 286 pr_debug("Failed to allocate new strlist for symbol events\n"); 287 return; 288 } 289 for (unsigned int i = 0; i < max; i++) { 290 /* 291 * New attr.config still not supported here, the latest 292 * example was PERF_COUNT_SW_CGROUP_SWITCHES 293 */ 294 if (syms[i].symbol == NULL) 295 continue; 296 297 if (!is_event_supported(type, i)) 298 continue; 299 300 if (strlen(syms[i].alias)) { 301 char name[MAX_NAME_LEN]; 302 303 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms[i].symbol, syms[i].alias); 304 strlist__add(evt_name_list, name); 305 } else 306 strlist__add(evt_name_list, syms[i].symbol); 307 } 308 309 strlist__for_each_entry(nd, evt_name_list) { 310 char *alias = strstr(nd->s, " OR "); 311 312 if (alias) { 313 *alias = '\0'; 314 alias += 4; 315 } 316 print_cb->print_event(print_state, 317 /*topic=*/NULL, 318 /*pmu_name=*/NULL, 319 nd->s, 320 alias, 321 /*scale_unit=*/NULL, 322 /*deprecated=*/false, 323 event_type_descriptors[type], 324 /*desc=*/NULL, 325 /*long_desc=*/NULL, 326 /*encoding_desc=*/NULL); 327 } 328 strlist__delete(evt_name_list); 329 } 330 331 /* 332 * Print the help text for the event symbols: 333 */ 334 void print_events(const struct print_callbacks *print_cb, void *print_state) 335 { 336 print_symbol_events(print_cb, print_state, PERF_TYPE_HARDWARE, 337 event_symbols_hw, PERF_COUNT_HW_MAX); 338 print_symbol_events(print_cb, print_state, PERF_TYPE_SOFTWARE, 339 event_symbols_sw, PERF_COUNT_SW_MAX); 340 341 print_tool_events(print_cb, print_state); 342 343 print_hwcache_events(print_cb, print_state); 344 345 print_pmu_events(print_cb, print_state); 346 347 print_cb->print_event(print_state, 348 /*topic=*/NULL, 349 /*pmu_name=*/NULL, 350 "rNNN", 351 /*event_alias=*/NULL, 352 /*scale_unit=*/NULL, 353 /*deprecated=*/false, 354 event_type_descriptors[PERF_TYPE_RAW], 355 /*desc=*/NULL, 356 /*long_desc=*/NULL, 357 /*encoding_desc=*/NULL); 358 359 print_cb->print_event(print_state, 360 /*topic=*/NULL, 361 /*pmu_name=*/NULL, 362 "cpu/t1=v1[,t2=v2,t3 ...]/modifier", 363 /*event_alias=*/NULL, 364 /*scale_unit=*/NULL, 365 /*deprecated=*/false, 366 event_type_descriptors[PERF_TYPE_RAW], 367 "(see 'man perf-list' on how to encode it)", 368 /*long_desc=*/NULL, 369 /*encoding_desc=*/NULL); 370 371 print_cb->print_event(print_state, 372 /*topic=*/NULL, 373 /*pmu_name=*/NULL, 374 "mem:<addr>[/len][:access]", 375 /*scale_unit=*/NULL, 376 /*event_alias=*/NULL, 377 /*deprecated=*/false, 378 event_type_descriptors[PERF_TYPE_BREAKPOINT], 379 /*desc=*/NULL, 380 /*long_desc=*/NULL, 381 /*encoding_desc=*/NULL); 382 383 print_tracepoint_events(print_cb, print_state); 384 385 print_sdt_events(print_cb, print_state); 386 387 metricgroup__print(print_cb, print_state); 388 389 print_libpfm_events(print_cb, print_state); 390 } 391