1// SPDX-License-Identifier: GPL-2.0
   2#include <linux/hw_breakpoint.h>
   3#include <linux/err.h>
   4#include <linux/zalloc.h>
   5#include <dirent.h>
   6#include <errno.h>
   7#include <sys/ioctl.h>
   8#include <sys/types.h>
   9#include <sys/stat.h>
  10#include <fcntl.h>
  11#include <sys/param.h>
  12#include "term.h"
  13#include "build-id.h"
  14#include "evlist.h"
  15#include "evsel.h"
  16#include <subcmd/pager.h>
  17#include <subcmd/parse-options.h>
  18#include "parse-events.h"
  19#include <subcmd/exec-cmd.h>
  20#include "string2.h"
  21#include "strlist.h"
  22#include "symbol.h"
 
  23#include "header.h"
  24#include "bpf-loader.h"
  25#include "debug.h"
  26#include <api/fs/tracing_path.h>
  27#include <perf/cpumap.h>
  28#include "parse-events-bison.h"
  29#define YY_EXTRA_TYPE int
  30#include "parse-events-flex.h"
  31#include "pmu.h"
  32#include "thread_map.h"
  33#include "probe-file.h"
  34#include "asm/bug.h"
  35#include "util/parse-branch-options.h"
  36#include "metricgroup.h"
  37#include "util/evsel_config.h"
  38#include "util/event.h"
  39
  40#define MAX_NAME_LEN 100
  41
 
 
 
 
 
  42#ifdef PARSER_DEBUG
  43extern int parse_events_debug;
  44#endif
  45int parse_events_parse(void *parse_state, void *scanner);
  46static int get_config_terms(struct list_head *head_config,
  47			    struct list_head *head_terms __maybe_unused);
  48
  49static struct perf_pmu_event_symbol *perf_pmu_events_list;
  50/*
  51 * The variable indicates the number of supported pmu event symbols.
  52 * 0 means not initialized and ready to init
  53 * -1 means failed to init, don't try anymore
  54 * >0 is the number of supported pmu event symbols
  55 */
  56static int perf_pmu_events_list_num;
  57
  58struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
  59	[PERF_COUNT_HW_CPU_CYCLES] = {
  60		.symbol = "cpu-cycles",
  61		.alias  = "cycles",
  62	},
  63	[PERF_COUNT_HW_INSTRUCTIONS] = {
  64		.symbol = "instructions",
  65		.alias  = "",
  66	},
  67	[PERF_COUNT_HW_CACHE_REFERENCES] = {
  68		.symbol = "cache-references",
  69		.alias  = "",
  70	},
  71	[PERF_COUNT_HW_CACHE_MISSES] = {
  72		.symbol = "cache-misses",
  73		.alias  = "",
  74	},
  75	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
  76		.symbol = "branch-instructions",
  77		.alias  = "branches",
  78	},
  79	[PERF_COUNT_HW_BRANCH_MISSES] = {
  80		.symbol = "branch-misses",
  81		.alias  = "",
  82	},
  83	[PERF_COUNT_HW_BUS_CYCLES] = {
  84		.symbol = "bus-cycles",
  85		.alias  = "",
  86	},
  87	[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
  88		.symbol = "stalled-cycles-frontend",
  89		.alias  = "idle-cycles-frontend",
  90	},
  91	[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
  92		.symbol = "stalled-cycles-backend",
  93		.alias  = "idle-cycles-backend",
  94	},
  95	[PERF_COUNT_HW_REF_CPU_CYCLES] = {
  96		.symbol = "ref-cycles",
  97		.alias  = "",
  98	},
  99};
 100
 101struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
 102	[PERF_COUNT_SW_CPU_CLOCK] = {
 103		.symbol = "cpu-clock",
 104		.alias  = "",
 105	},
 106	[PERF_COUNT_SW_TASK_CLOCK] = {
 107		.symbol = "task-clock",
 108		.alias  = "",
 109	},
 110	[PERF_COUNT_SW_PAGE_FAULTS] = {
 111		.symbol = "page-faults",
 112		.alias  = "faults",
 113	},
 114	[PERF_COUNT_SW_CONTEXT_SWITCHES] = {
 115		.symbol = "context-switches",
 116		.alias  = "cs",
 117	},
 118	[PERF_COUNT_SW_CPU_MIGRATIONS] = {
 119		.symbol = "cpu-migrations",
 120		.alias  = "migrations",
 121	},
 122	[PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
 123		.symbol = "minor-faults",
 124		.alias  = "",
 125	},
 126	[PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
 127		.symbol = "major-faults",
 128		.alias  = "",
 129	},
 130	[PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
 131		.symbol = "alignment-faults",
 132		.alias  = "",
 133	},
 134	[PERF_COUNT_SW_EMULATION_FAULTS] = {
 135		.symbol = "emulation-faults",
 136		.alias  = "",
 137	},
 138	[PERF_COUNT_SW_DUMMY] = {
 139		.symbol = "dummy",
 140		.alias  = "",
 141	},
 142	[PERF_COUNT_SW_BPF_OUTPUT] = {
 143		.symbol = "bpf-output",
 144		.alias  = "",
 145	},
 146};
 147
 148#define __PERF_EVENT_FIELD(config, name) \
 149	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
 150
 151#define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
 152#define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
 153#define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
 154#define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)
 155
 156#define for_each_subsystem(sys_dir, sys_dirent)			\
 157	while ((sys_dirent = readdir(sys_dir)) != NULL)		\
 158		if (sys_dirent->d_type == DT_DIR &&		\
 159		    (strcmp(sys_dirent->d_name, ".")) &&	\
 160		    (strcmp(sys_dirent->d_name, "..")))
 161
 162static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
 163{
 164	char evt_path[MAXPATHLEN];
 165	int fd;
 166
 167	snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
 
 168	fd = open(evt_path, O_RDONLY);
 169	if (fd < 0)
 170		return -EINVAL;
 171	close(fd);
 172
 173	return 0;
 174}
 175
 176#define for_each_event(dir_path, evt_dir, evt_dirent)		\
 177	while ((evt_dirent = readdir(evt_dir)) != NULL)		\
 178		if (evt_dirent->d_type == DT_DIR &&		\
 179		    (strcmp(evt_dirent->d_name, ".")) &&	\
 180		    (strcmp(evt_dirent->d_name, "..")) &&	\
 181		    (!tp_event_has_id(dir_path, evt_dirent)))
 182
 183#define MAX_EVENT_LENGTH 512
 184
 185
 186struct tracepoint_path *tracepoint_id_to_path(u64 config)
 187{
 188	struct tracepoint_path *path = NULL;
 189	DIR *sys_dir, *evt_dir;
 190	struct dirent *sys_dirent, *evt_dirent;
 191	char id_buf[24];
 192	int fd;
 193	u64 id;
 194	char evt_path[MAXPATHLEN];
 195	char *dir_path;
 196
 197	sys_dir = tracing_events__opendir();
 
 
 
 198	if (!sys_dir)
 199		return NULL;
 200
 201	for_each_subsystem(sys_dir, sys_dirent) {
 202		dir_path = get_events_file(sys_dirent->d_name);
 203		if (!dir_path)
 204			continue;
 205		evt_dir = opendir(dir_path);
 206		if (!evt_dir)
 207			goto next;
 208
 209		for_each_event(dir_path, evt_dir, evt_dirent) {
 210
 211			scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 212				  evt_dirent->d_name);
 213			fd = open(evt_path, O_RDONLY);
 214			if (fd < 0)
 215				continue;
 216			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 217				close(fd);
 218				continue;
 219			}
 220			close(fd);
 221			id = atoll(id_buf);
 222			if (id == config) {
 223				put_events_file(dir_path);
 224				closedir(evt_dir);
 225				closedir(sys_dir);
 226				path = zalloc(sizeof(*path));
 227				if (!path)
 228					return NULL;
 229				path->system = malloc(MAX_EVENT_LENGTH);
 230				if (!path->system) {
 231					free(path);
 232					return NULL;
 233				}
 234				path->name = malloc(MAX_EVENT_LENGTH);
 235				if (!path->name) {
 236					zfree(&path->system);
 237					free(path);
 238					return NULL;
 239				}
 240				strncpy(path->system, sys_dirent->d_name,
 241					MAX_EVENT_LENGTH);
 242				strncpy(path->name, evt_dirent->d_name,
 243					MAX_EVENT_LENGTH);
 244				return path;
 245			}
 246		}
 247		closedir(evt_dir);
 248next:
 249		put_events_file(dir_path);
 250	}
 251
 252	closedir(sys_dir);
 253	return NULL;
 254}
 255
 256struct tracepoint_path *tracepoint_name_to_path(const char *name)
 257{
 258	struct tracepoint_path *path = zalloc(sizeof(*path));
 259	char *str = strchr(name, ':');
 260
 261	if (path == NULL || str == NULL) {
 262		free(path);
 263		return NULL;
 264	}
 265
 266	path->system = strndup(name, str - name);
 267	path->name = strdup(str+1);
 268
 269	if (path->system == NULL || path->name == NULL) {
 270		zfree(&path->system);
 271		zfree(&path->name);
 272		zfree(&path);
 
 273	}
 274
 275	return path;
 276}
 277
 278const char *event_type(int type)
 279{
 280	switch (type) {
 281	case PERF_TYPE_HARDWARE:
 282		return "hardware";
 283
 284	case PERF_TYPE_SOFTWARE:
 285		return "software";
 286
 287	case PERF_TYPE_TRACEPOINT:
 288		return "tracepoint";
 289
 290	case PERF_TYPE_HW_CACHE:
 291		return "hardware-cache";
 292
 293	default:
 294		break;
 295	}
 296
 297	return "unknown";
 298}
 299
 300static int parse_events__is_name_term(struct parse_events_term *term)
 301{
 302	return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
 303}
 304
 305static char *get_config_name(struct list_head *head_terms)
 306{
 307	struct parse_events_term *term;
 308
 309	if (!head_terms)
 310		return NULL;
 311
 312	list_for_each_entry(term, head_terms, list)
 313		if (parse_events__is_name_term(term))
 314			return term->val.str;
 315
 316	return NULL;
 317}
 318
 319static struct evsel *
 320__add_event(struct list_head *list, int *idx,
 321	    struct perf_event_attr *attr,
 322	    char *name, struct perf_pmu *pmu,
 323	    struct list_head *config_terms, bool auto_merge_stats,
 324	    const char *cpu_list)
 325{
 326	struct evsel *evsel;
 327	struct perf_cpu_map *cpus = pmu ? pmu->cpus :
 328			       cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
 329
 330	event_attr_init(attr);
 331
 332	evsel = perf_evsel__new_idx(attr, *idx);
 333	if (!evsel)
 334		return NULL;
 335
 336	(*idx)++;
 337	evsel->core.cpus   = perf_cpu_map__get(cpus);
 338	evsel->core.own_cpus = perf_cpu_map__get(cpus);
 339	evsel->core.system_wide = pmu ? pmu->is_uncore : false;
 340	evsel->auto_merge_stats = auto_merge_stats;
 341
 342	if (name)
 343		evsel->name = strdup(name);
 344
 345	if (config_terms)
 346		list_splice(config_terms, &evsel->config_terms);
 347
 348	list_add_tail(&evsel->core.node, list);
 349	return evsel;
 350}
 351
 352static int add_event(struct list_head *list, int *idx,
 353		     struct perf_event_attr *attr, char *name,
 354		     struct list_head *config_terms)
 355{
 356	return __add_event(list, idx, attr, name, NULL, config_terms, false, NULL) ? 0 : -ENOMEM;
 357}
 358
 359static int add_event_tool(struct list_head *list, int *idx,
 360			  enum perf_tool_event tool_event)
 361{
 362	struct evsel *evsel;
 363	struct perf_event_attr attr = {
 364		.type = PERF_TYPE_SOFTWARE,
 365		.config = PERF_COUNT_SW_DUMMY,
 366	};
 367
 368	evsel = __add_event(list, idx, &attr, NULL, NULL, NULL, false, "0");
 369	if (!evsel)
 370		return -ENOMEM;
 371	evsel->tool_event = tool_event;
 372	if (tool_event == PERF_TOOL_DURATION_TIME)
 373		evsel->unit = strdup("ns");
 374	return 0;
 375}
 376
 377static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 378{
 379	int i, j;
 380	int n, longest = -1;
 381
 382	for (i = 0; i < size; i++) {
 383		for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
 384			n = strlen(names[i][j]);
 385			if (n > longest && !strncasecmp(str, names[i][j], n))
 386				longest = n;
 387		}
 388		if (longest > 0)
 389			return i;
 390	}
 391
 392	return -1;
 393}
 394
 395typedef int config_term_func_t(struct perf_event_attr *attr,
 396			       struct parse_events_term *term,
 397			       struct parse_events_error *err);
 398static int config_term_common(struct perf_event_attr *attr,
 399			      struct parse_events_term *term,
 400			      struct parse_events_error *err);
 401static int config_attr(struct perf_event_attr *attr,
 402		       struct list_head *head,
 403		       struct parse_events_error *err,
 404		       config_term_func_t config_term);
 405
 406int parse_events_add_cache(struct list_head *list, int *idx,
 407			   char *type, char *op_result1, char *op_result2,
 408			   struct parse_events_error *err,
 409			   struct list_head *head_config)
 410{
 411	struct perf_event_attr attr;
 412	LIST_HEAD(config_terms);
 413	char name[MAX_NAME_LEN], *config_name;
 414	int cache_type = -1, cache_op = -1, cache_result = -1;
 415	char *op_result[2] = { op_result1, op_result2 };
 416	int i, n;
 417
 418	/*
 419	 * No fallback - if we cannot get a clear cache type
 420	 * then bail out:
 421	 */
 422	cache_type = parse_aliases(type, perf_evsel__hw_cache,
 423				   PERF_COUNT_HW_CACHE_MAX);
 424	if (cache_type == -1)
 425		return -EINVAL;
 426
 427	config_name = get_config_name(head_config);
 428	n = snprintf(name, MAX_NAME_LEN, "%s", type);
 429
 430	for (i = 0; (i < 2) && (op_result[i]); i++) {
 431		char *str = op_result[i];
 432
 433		n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 434
 435		if (cache_op == -1) {
 436			cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
 437						 PERF_COUNT_HW_CACHE_OP_MAX);
 438			if (cache_op >= 0) {
 439				if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
 440					return -EINVAL;
 441				continue;
 442			}
 443		}
 444
 445		if (cache_result == -1) {
 446			cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
 447						     PERF_COUNT_HW_CACHE_RESULT_MAX);
 448			if (cache_result >= 0)
 449				continue;
 450		}
 451	}
 452
 453	/*
 454	 * Fall back to reads:
 455	 */
 456	if (cache_op == -1)
 457		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 458
 459	/*
 460	 * Fall back to accesses:
 461	 */
 462	if (cache_result == -1)
 463		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 464
 465	memset(&attr, 0, sizeof(attr));
 466	attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
 467	attr.type = PERF_TYPE_HW_CACHE;
 468
 469	if (head_config) {
 470		if (config_attr(&attr, head_config, err,
 471				config_term_common))
 472			return -EINVAL;
 473
 474		if (get_config_terms(head_config, &config_terms))
 475			return -ENOMEM;
 476	}
 477	return add_event(list, idx, &attr, config_name ? : name, &config_terms);
 478}
 479
 480static void tracepoint_error(struct parse_events_error *e, int err,
 481			     const char *sys, const char *name)
 482{
 483	char help[BUFSIZ];
 484
 485	if (!e)
 486		return;
 487
 488	/*
 489	 * We get error directly from syscall errno ( > 0),
 490	 * or from encoded pointer's error ( < 0).
 491	 */
 492	err = abs(err);
 493
 494	switch (err) {
 495	case EACCES:
 496		e->str = strdup("can't access trace events");
 497		break;
 498	case ENOENT:
 499		e->str = strdup("unknown tracepoint");
 500		break;
 501	default:
 502		e->str = strdup("failed to add tracepoint");
 503		break;
 504	}
 505
 506	tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
 507	e->help = strdup(help);
 508}
 509
 510static int add_tracepoint(struct list_head *list, int *idx,
 511			  const char *sys_name, const char *evt_name,
 512			  struct parse_events_error *err,
 513			  struct list_head *head_config)
 514{
 515	struct evsel *evsel;
 516
 517	evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
 518	if (IS_ERR(evsel)) {
 519		tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
 520		return PTR_ERR(evsel);
 521	}
 522
 523	if (head_config) {
 524		LIST_HEAD(config_terms);
 525
 526		if (get_config_terms(head_config, &config_terms))
 527			return -ENOMEM;
 528		list_splice(&config_terms, &evsel->config_terms);
 529	}
 530
 531	list_add_tail(&evsel->core.node, list);
 532	return 0;
 533}
 534
 535static int add_tracepoint_multi_event(struct list_head *list, int *idx,
 536				      const char *sys_name, const char *evt_name,
 537				      struct parse_events_error *err,
 538				      struct list_head *head_config)
 539{
 540	char *evt_path;
 541	struct dirent *evt_ent;
 542	DIR *evt_dir;
 543	int ret = 0, found = 0;
 544
 545	evt_path = get_events_file(sys_name);
 546	if (!evt_path) {
 547		tracepoint_error(err, errno, sys_name, evt_name);
 548		return -1;
 549	}
 550	evt_dir = opendir(evt_path);
 551	if (!evt_dir) {
 552		put_events_file(evt_path);
 553		tracepoint_error(err, errno, sys_name, evt_name);
 554		return -1;
 555	}
 556
 557	while (!ret && (evt_ent = readdir(evt_dir))) {
 558		if (!strcmp(evt_ent->d_name, ".")
 559		    || !strcmp(evt_ent->d_name, "..")
 560		    || !strcmp(evt_ent->d_name, "enable")
 561		    || !strcmp(evt_ent->d_name, "filter"))
 562			continue;
 563
 564		if (!strglobmatch(evt_ent->d_name, evt_name))
 565			continue;
 566
 567		found++;
 568
 569		ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
 570				     err, head_config);
 571	}
 572
 573	if (!found) {
 574		tracepoint_error(err, ENOENT, sys_name, evt_name);
 575		ret = -1;
 576	}
 577
 578	put_events_file(evt_path);
 579	closedir(evt_dir);
 580	return ret;
 581}
 582
 583static int add_tracepoint_event(struct list_head *list, int *idx,
 584				const char *sys_name, const char *evt_name,
 585				struct parse_events_error *err,
 586				struct list_head *head_config)
 587{
 588	return strpbrk(evt_name, "*?") ?
 589	       add_tracepoint_multi_event(list, idx, sys_name, evt_name,
 590					  err, head_config) :
 591	       add_tracepoint(list, idx, sys_name, evt_name,
 592			      err, head_config);
 593}
 594
 595static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
 596				    const char *sys_name, const char *evt_name,
 597				    struct parse_events_error *err,
 598				    struct list_head *head_config)
 599{
 600	struct dirent *events_ent;
 601	DIR *events_dir;
 602	int ret = 0;
 603
 604	events_dir = tracing_events__opendir();
 605	if (!events_dir) {
 606		tracepoint_error(err, errno, sys_name, evt_name);
 607		return -1;
 608	}
 609
 610	while (!ret && (events_ent = readdir(events_dir))) {
 611		if (!strcmp(events_ent->d_name, ".")
 612		    || !strcmp(events_ent->d_name, "..")
 613		    || !strcmp(events_ent->d_name, "enable")
 614		    || !strcmp(events_ent->d_name, "header_event")
 615		    || !strcmp(events_ent->d_name, "header_page"))
 616			continue;
 617
 618		if (!strglobmatch(events_ent->d_name, sys_name))
 619			continue;
 620
 621		ret = add_tracepoint_event(list, idx, events_ent->d_name,
 622					   evt_name, err, head_config);
 623	}
 624
 625	closedir(events_dir);
 626	return ret;
 627}
 628
 629struct __add_bpf_event_param {
 630	struct parse_events_state *parse_state;
 631	struct list_head *list;
 632	struct list_head *head_config;
 633};
 634
 635static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
 636			 void *_param)
 637{
 638	LIST_HEAD(new_evsels);
 639	struct __add_bpf_event_param *param = _param;
 640	struct parse_events_state *parse_state = param->parse_state;
 641	struct list_head *list = param->list;
 642	struct evsel *pos;
 643	int err;
 644	/*
 645	 * Check if we should add the event, i.e. if it is a TP but starts with a '!',
 646	 * then don't add the tracepoint, this will be used for something else, like
 647	 * adding to a BPF_MAP_TYPE_PROG_ARRAY.
 648	 *
 649	 * See tools/perf/examples/bpf/augmented_raw_syscalls.c
 650	 */
 651	if (group[0] == '!')
 652		return 0;
 653
 654	pr_debug("add bpf event %s:%s and attach bpf program %d\n",
 655		 group, event, fd);
 656
 657	err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
 658					  event, parse_state->error,
 659					  param->head_config);
 660	if (err) {
 661		struct evsel *evsel, *tmp;
 662
 663		pr_debug("Failed to add BPF event %s:%s\n",
 664			 group, event);
 665		list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
 666			list_del_init(&evsel->core.node);
 667			evsel__delete(evsel);
 668		}
 669		return err;
 670	}
 671	pr_debug("adding %s:%s\n", group, event);
 672
 673	list_for_each_entry(pos, &new_evsels, core.node) {
 674		pr_debug("adding %s:%s to %p\n",
 675			 group, event, pos);
 676		pos->bpf_fd = fd;
 677		pos->bpf_obj = obj;
 678	}
 679	list_splice(&new_evsels, list);
 680	return 0;
 681}
 682
 683int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
 684			      struct list_head *list,
 685			      struct bpf_object *obj,
 686			      struct list_head *head_config)
 687{
 688	int err;
 689	char errbuf[BUFSIZ];
 690	struct __add_bpf_event_param param = {parse_state, list, head_config};
 691	static bool registered_unprobe_atexit = false;
 692
 693	if (IS_ERR(obj) || !obj) {
 694		snprintf(errbuf, sizeof(errbuf),
 695			 "Internal error: load bpf obj with NULL");
 696		err = -EINVAL;
 697		goto errout;
 698	}
 699
 700	/*
 701	 * Register atexit handler before calling bpf__probe() so
 702	 * bpf__probe() don't need to unprobe probe points its already
 703	 * created when failure.
 704	 */
 705	if (!registered_unprobe_atexit) {
 706		atexit(bpf__clear);
 707		registered_unprobe_atexit = true;
 708	}
 709
 710	err = bpf__probe(obj);
 711	if (err) {
 712		bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
 713		goto errout;
 714	}
 715
 716	err = bpf__load(obj);
 717	if (err) {
 718		bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
 719		goto errout;
 720	}
 721
 722	err = bpf__foreach_event(obj, add_bpf_event, &param);
 723	if (err) {
 724		snprintf(errbuf, sizeof(errbuf),
 725			 "Attach events in BPF object failed");
 726		goto errout;
 727	}
 728
 729	return 0;
 730errout:
 731	parse_state->error->help = strdup("(add -v to see detail)");
 732	parse_state->error->str = strdup(errbuf);
 733	return err;
 734}
 735
 736static int
 737parse_events_config_bpf(struct parse_events_state *parse_state,
 738			struct bpf_object *obj,
 739			struct list_head *head_config)
 740{
 741	struct parse_events_term *term;
 742	int error_pos;
 743
 744	if (!head_config || list_empty(head_config))
 745		return 0;
 746
 747	list_for_each_entry(term, head_config, list) {
 748		char errbuf[BUFSIZ];
 749		int err;
 750
 751		if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
 752			snprintf(errbuf, sizeof(errbuf),
 753				 "Invalid config term for BPF object");
 754			errbuf[BUFSIZ - 1] = '\0';
 755
 756			parse_state->error->idx = term->err_term;
 757			parse_state->error->str = strdup(errbuf);
 758			return -EINVAL;
 759		}
 760
 761		err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
 762		if (err) {
 763			bpf__strerror_config_obj(obj, term, parse_state->evlist,
 764						 &error_pos, err, errbuf,
 765						 sizeof(errbuf));
 766			parse_state->error->help = strdup(
 767"Hint:\tValid config terms:\n"
 768"     \tmap:[<arraymap>].value<indices>=[value]\n"
 769"     \tmap:[<eventmap>].event<indices>=[event]\n"
 770"\n"
 771"     \twhere <indices> is something like [0,3...5] or [all]\n"
 772"     \t(add -v to see detail)");
 773			parse_state->error->str = strdup(errbuf);
 774			if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
 775				parse_state->error->idx = term->err_val;
 776			else
 777				parse_state->error->idx = term->err_term + error_pos;
 778			return err;
 779		}
 780	}
 781	return 0;
 782}
 783
 784/*
 785 * Split config terms:
 786 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 787 *  'call-graph=fp' is 'evt config', should be applied to each
 788 *  events in bpf.c.
 789 * 'map:array.value[0]=1' is 'obj config', should be processed
 790 * with parse_events_config_bpf.
 791 *
 792 * Move object config terms from the first list to obj_head_config.
 793 */
 794static void
 795split_bpf_config_terms(struct list_head *evt_head_config,
 796		       struct list_head *obj_head_config)
 797{
 798	struct parse_events_term *term, *temp;
 799
 800	/*
 801	 * Currectly, all possible user config term
 802	 * belong to bpf object. parse_events__is_hardcoded_term()
 803	 * happends to be a good flag.
 804	 *
 805	 * See parse_events_config_bpf() and
 806	 * config_term_tracepoint().
 807	 */
 808	list_for_each_entry_safe(term, temp, evt_head_config, list)
 809		if (!parse_events__is_hardcoded_term(term))
 810			list_move_tail(&term->list, obj_head_config);
 811}
 812
 813int parse_events_load_bpf(struct parse_events_state *parse_state,
 814			  struct list_head *list,
 815			  char *bpf_file_name,
 816			  bool source,
 817			  struct list_head *head_config)
 818{
 819	int err;
 820	struct bpf_object *obj;
 821	LIST_HEAD(obj_head_config);
 822
 823	if (head_config)
 824		split_bpf_config_terms(head_config, &obj_head_config);
 825
 826	obj = bpf__prepare_load(bpf_file_name, source);
 827	if (IS_ERR(obj)) {
 828		char errbuf[BUFSIZ];
 829
 830		err = PTR_ERR(obj);
 831
 832		if (err == -ENOTSUP)
 833			snprintf(errbuf, sizeof(errbuf),
 834				 "BPF support is not compiled");
 835		else
 836			bpf__strerror_prepare_load(bpf_file_name,
 837						   source,
 838						   -err, errbuf,
 839						   sizeof(errbuf));
 840
 841		parse_state->error->help = strdup("(add -v to see detail)");
 842		parse_state->error->str = strdup(errbuf);
 843		return err;
 844	}
 845
 846	err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
 847	if (err)
 848		return err;
 849	err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
 850
 851	/*
 852	 * Caller doesn't know anything about obj_head_config,
 853	 * so combine them together again before returnning.
 854	 */
 855	if (head_config)
 856		list_splice_tail(&obj_head_config, head_config);
 857	return err;
 858}
 859
 860static int
 861parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
 862{
 863	int i;
 864
 865	for (i = 0; i < 3; i++) {
 866		if (!type || !type[i])
 867			break;
 868
 869#define CHECK_SET_TYPE(bit)		\
 870do {					\
 871	if (attr->bp_type & bit)	\
 872		return -EINVAL;		\
 873	else				\
 874		attr->bp_type |= bit;	\
 875} while (0)
 876
 877		switch (type[i]) {
 878		case 'r':
 879			CHECK_SET_TYPE(HW_BREAKPOINT_R);
 880			break;
 881		case 'w':
 882			CHECK_SET_TYPE(HW_BREAKPOINT_W);
 883			break;
 884		case 'x':
 885			CHECK_SET_TYPE(HW_BREAKPOINT_X);
 886			break;
 887		default:
 888			return -EINVAL;
 889		}
 890	}
 891
 892#undef CHECK_SET_TYPE
 893
 894	if (!attr->bp_type) /* Default */
 895		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 896
 897	return 0;
 898}
 899
 900int parse_events_add_breakpoint(struct list_head *list, int *idx,
 901				void *ptr, char *type, u64 len)
 902{
 903	struct perf_event_attr attr;
 904
 905	memset(&attr, 0, sizeof(attr));
 906	attr.bp_addr = (unsigned long) ptr;
 907
 908	if (parse_breakpoint_type(type, &attr))
 909		return -EINVAL;
 910
 911	/* Provide some defaults if len is not specified */
 912	if (!len) {
 913		if (attr.bp_type == HW_BREAKPOINT_X)
 914			len = sizeof(long);
 915		else
 916			len = HW_BREAKPOINT_LEN_4;
 917	}
 918
 919	attr.bp_len = len;
 920
 921	attr.type = PERF_TYPE_BREAKPOINT;
 922	attr.sample_period = 1;
 923
 924	return add_event(list, idx, &attr, NULL, NULL);
 925}
 926
 927static int check_type_val(struct parse_events_term *term,
 928			  struct parse_events_error *err,
 929			  int type)
 930{
 931	if (type == term->type_val)
 932		return 0;
 933
 934	if (err) {
 935		err->idx = term->err_val;
 936		if (type == PARSE_EVENTS__TERM_TYPE_NUM)
 937			err->str = strdup("expected numeric value");
 938		else
 939			err->str = strdup("expected string value");
 940	}
 941	return -EINVAL;
 942}
 943
 944/*
 945 * Update according to parse-events.l
 946 */
 947static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
 948	[PARSE_EVENTS__TERM_TYPE_USER]			= "<sysfs term>",
 949	[PARSE_EVENTS__TERM_TYPE_CONFIG]		= "config",
 950	[PARSE_EVENTS__TERM_TYPE_CONFIG1]		= "config1",
 951	[PARSE_EVENTS__TERM_TYPE_CONFIG2]		= "config2",
 952	[PARSE_EVENTS__TERM_TYPE_NAME]			= "name",
 953	[PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]		= "period",
 954	[PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]		= "freq",
 955	[PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]	= "branch_type",
 956	[PARSE_EVENTS__TERM_TYPE_TIME]			= "time",
 957	[PARSE_EVENTS__TERM_TYPE_CALLGRAPH]		= "call-graph",
 958	[PARSE_EVENTS__TERM_TYPE_STACKSIZE]		= "stack-size",
 959	[PARSE_EVENTS__TERM_TYPE_NOINHERIT]		= "no-inherit",
 960	[PARSE_EVENTS__TERM_TYPE_INHERIT]		= "inherit",
 961	[PARSE_EVENTS__TERM_TYPE_MAX_STACK]		= "max-stack",
 962	[PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]		= "nr",
 963	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
 964	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
 965	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
 966	[PARSE_EVENTS__TERM_TYPE_PERCORE]		= "percore",
 967	[PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]		= "aux-output",
 968};
 969
 970static bool config_term_shrinked;
 971
 972static bool
 973config_term_avail(int term_type, struct parse_events_error *err)
 974{
 975	if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
 976		err->str = strdup("Invalid term_type");
 977		return false;
 978	}
 979	if (!config_term_shrinked)
 980		return true;
 981
 982	switch (term_type) {
 983	case PARSE_EVENTS__TERM_TYPE_CONFIG:
 984	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
 985	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 986	case PARSE_EVENTS__TERM_TYPE_NAME:
 987	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
 988	case PARSE_EVENTS__TERM_TYPE_PERCORE:
 989		return true;
 990	default:
 991		if (!err)
 992			return false;
 993
 994		/* term_type is validated so indexing is safe */
 995		if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
 996			     config_term_names[term_type]) < 0)
 997			err->str = NULL;
 998		return false;
 999	}
1000}
1001
1002void parse_events__shrink_config_terms(void)
1003{
1004	config_term_shrinked = true;
1005}
1006
1007static int config_term_common(struct perf_event_attr *attr,
1008			      struct parse_events_term *term,
1009			      struct parse_events_error *err)
1010{
1011#define CHECK_TYPE_VAL(type)						   \
1012do {									   \
1013	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1014		return -EINVAL;						   \
1015} while (0)
1016
1017	switch (term->type_term) {
1018	case PARSE_EVENTS__TERM_TYPE_CONFIG:
1019		CHECK_TYPE_VAL(NUM);
1020		attr->config = term->val.num;
1021		break;
1022	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1023		CHECK_TYPE_VAL(NUM);
1024		attr->config1 = term->val.num;
1025		break;
1026	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1027		CHECK_TYPE_VAL(NUM);
1028		attr->config2 = term->val.num;
1029		break;
1030	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1031		CHECK_TYPE_VAL(NUM);
1032		break;
1033	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1034		CHECK_TYPE_VAL(NUM);
1035		break;
1036	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1037		CHECK_TYPE_VAL(STR);
1038		if (strcmp(term->val.str, "no") &&
1039		    parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1040			err->str = strdup("invalid branch sample type");
1041			err->idx = term->err_val;
1042			return -EINVAL;
1043		}
1044		break;
1045	case PARSE_EVENTS__TERM_TYPE_TIME:
1046		CHECK_TYPE_VAL(NUM);
1047		if (term->val.num > 1) {
1048			err->str = strdup("expected 0 or 1");
1049			err->idx = term->err_val;
1050			return -EINVAL;
1051		}
1052		break;
1053	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1054		CHECK_TYPE_VAL(STR);
1055		break;
1056	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1057		CHECK_TYPE_VAL(NUM);
1058		break;
1059	case PARSE_EVENTS__TERM_TYPE_INHERIT:
1060		CHECK_TYPE_VAL(NUM);
1061		break;
1062	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1063		CHECK_TYPE_VAL(NUM);
1064		break;
1065	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1066		CHECK_TYPE_VAL(NUM);
1067		break;
1068	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1069		CHECK_TYPE_VAL(NUM);
1070		break;
1071	case PARSE_EVENTS__TERM_TYPE_NAME:
1072		CHECK_TYPE_VAL(STR);
1073		break;
1074	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1075		CHECK_TYPE_VAL(NUM);
1076		break;
1077	case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1078		CHECK_TYPE_VAL(NUM);
1079		break;
1080	case PARSE_EVENTS__TERM_TYPE_PERCORE:
1081		CHECK_TYPE_VAL(NUM);
1082		if ((unsigned int)term->val.num > 1) {
1083			err->str = strdup("expected 0 or 1");
1084			err->idx = term->err_val;
1085			return -EINVAL;
1086		}
1087		break;
1088	case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1089		CHECK_TYPE_VAL(NUM);
1090		break;
1091	default:
1092		err->str = strdup("unknown term");
1093		err->idx = term->err_term;
1094		err->help = parse_events_formats_error_string(NULL);
1095		return -EINVAL;
1096	}
1097
1098	/*
1099	 * Check term availbility after basic checking so
1100	 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1101	 *
1102	 * If check availbility at the entry of this function,
1103	 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1104	 * if an invalid config term is provided for legacy events
1105	 * (for example, instructions/badterm/...), which is confusing.
1106	 */
1107	if (!config_term_avail(term->type_term, err))
1108		return -EINVAL;
1109	return 0;
1110#undef CHECK_TYPE_VAL
1111}
1112
1113static int config_term_pmu(struct perf_event_attr *attr,
1114			   struct parse_events_term *term,
1115			   struct parse_events_error *err)
1116{
1117	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1118	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1119		/*
1120		 * Always succeed for sysfs terms, as we dont know
1121		 * at this point what type they need to have.
1122		 */
1123		return 0;
1124	else
1125		return config_term_common(attr, term, err);
1126}
1127
1128static int config_term_tracepoint(struct perf_event_attr *attr,
1129				  struct parse_events_term *term,
1130				  struct parse_events_error *err)
1131{
1132	switch (term->type_term) {
1133	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1134	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1135	case PARSE_EVENTS__TERM_TYPE_INHERIT:
1136	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1137	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1138	case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1139	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1140	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1141	case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1142		return config_term_common(attr, term, err);
1143	default:
1144		if (err) {
1145			err->idx = term->err_term;
1146			err->str = strdup("unknown term");
1147			err->help = strdup("valid terms: call-graph,stack-size\n");
1148		}
1149		return -EINVAL;
1150	}
1151
1152	return 0;
1153}
1154
1155static int config_attr(struct perf_event_attr *attr,
1156		       struct list_head *head,
1157		       struct parse_events_error *err,
1158		       config_term_func_t config_term)
1159{
1160	struct parse_events_term *term;
1161
1162	list_for_each_entry(term, head, list)
1163		if (config_term(attr, term, err))
1164			return -EINVAL;
1165
1166	return 0;
1167}
1168
1169static int get_config_terms(struct list_head *head_config,
1170			    struct list_head *head_terms __maybe_unused)
1171{
1172#define ADD_CONFIG_TERM(__type, __name, __val)			\
1173do {								\
1174	struct perf_evsel_config_term *__t;			\
1175								\
1176	__t = zalloc(sizeof(*__t));				\
1177	if (!__t)						\
1178		return -ENOMEM;					\
1179								\
1180	INIT_LIST_HEAD(&__t->list);				\
1181	__t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;	\
1182	__t->val.__name = __val;				\
1183	__t->weak	= term->weak;				\
1184	list_add_tail(&__t->list, head_terms);			\
1185} while (0)
1186
1187	struct parse_events_term *term;
1188
1189	list_for_each_entry(term, head_config, list) {
1190		switch (term->type_term) {
1191		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1192			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1193			break;
1194		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1195			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1196			break;
1197		case PARSE_EVENTS__TERM_TYPE_TIME:
1198			ADD_CONFIG_TERM(TIME, time, term->val.num);
1199			break;
1200		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1201			ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1202			break;
1203		case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1204			ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1205			break;
1206		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1207			ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1208			break;
1209		case PARSE_EVENTS__TERM_TYPE_INHERIT:
1210			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1211			break;
1212		case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1213			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1214			break;
1215		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1216			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1217			break;
1218		case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1219			ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1220			break;
1221		case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1222			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1223			break;
1224		case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1225			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1226			break;
1227		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1228			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1229			break;
1230		case PARSE_EVENTS__TERM_TYPE_PERCORE:
1231			ADD_CONFIG_TERM(PERCORE, percore,
1232					term->val.num ? true : false);
1233			break;
1234		case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1235			ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
1236			break;
1237		default:
1238			break;
1239		}
1240	}
1241#undef ADD_EVSEL_CONFIG
1242	return 0;
1243}
1244
1245int parse_events_add_tracepoint(struct list_head *list, int *idx,
1246				const char *sys, const char *event,
1247				struct parse_events_error *err,
1248				struct list_head *head_config)
1249{
1250	if (head_config) {
1251		struct perf_event_attr attr;
1252
1253		if (config_attr(&attr, head_config, err,
1254				config_term_tracepoint))
1255			return -EINVAL;
1256	}
1257
1258	if (strpbrk(sys, "*?"))
1259		return add_tracepoint_multi_sys(list, idx, sys, event,
1260						err, head_config);
1261	else
1262		return add_tracepoint_event(list, idx, sys, event,
1263					    err, head_config);
1264}
1265
1266int parse_events_add_numeric(struct parse_events_state *parse_state,
1267			     struct list_head *list,
1268			     u32 type, u64 config,
1269			     struct list_head *head_config)
1270{
1271	struct perf_event_attr attr;
1272	LIST_HEAD(config_terms);
1273
1274	memset(&attr, 0, sizeof(attr));
1275	attr.type = type;
1276	attr.config = config;
1277
1278	if (head_config) {
1279		if (config_attr(&attr, head_config, parse_state->error,
1280				config_term_common))
1281			return -EINVAL;
1282
1283		if (get_config_terms(head_config, &config_terms))
1284			return -ENOMEM;
1285	}
1286
1287	return add_event(list, &parse_state->idx, &attr,
1288			 get_config_name(head_config), &config_terms);
1289}
1290
1291int parse_events_add_tool(struct parse_events_state *parse_state,
1292			  struct list_head *list,
1293			  enum perf_tool_event tool_event)
1294{
1295	return add_event_tool(list, &parse_state->idx, tool_event);
1296}
1297
1298static bool config_term_percore(struct list_head *config_terms)
1299{
1300	struct perf_evsel_config_term *term;
1301
1302	list_for_each_entry(term, config_terms, list) {
1303		if (term->type == PERF_EVSEL__CONFIG_TERM_PERCORE)
1304			return term->val.percore;
1305	}
1306
1307	return false;
1308}
1309
1310int parse_events_add_pmu(struct parse_events_state *parse_state,
1311			 struct list_head *list, char *name,
1312			 struct list_head *head_config,
1313			 bool auto_merge_stats,
1314			 bool use_alias)
1315{
1316	struct perf_event_attr attr;
1317	struct perf_pmu_info info;
1318	struct perf_pmu *pmu;
1319	struct evsel *evsel;
1320	struct parse_events_error *err = parse_state->error;
1321	bool use_uncore_alias;
1322	LIST_HEAD(config_terms);
1323
1324	pmu = perf_pmu__find(name);
1325	if (!pmu) {
1326		if (asprintf(&err->str,
1327				"Cannot find PMU `%s'. Missing kernel support?",
1328				name) < 0)
1329			err->str = NULL;
1330		return -EINVAL;
1331	}
1332
1333	if (pmu->default_config) {
1334		memcpy(&attr, pmu->default_config,
1335		       sizeof(struct perf_event_attr));
1336	} else {
1337		memset(&attr, 0, sizeof(attr));
1338	}
1339
1340	use_uncore_alias = (pmu->is_uncore && use_alias);
1341
1342	if (!head_config) {
1343		attr.type = pmu->type;
1344		evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
1345				    auto_merge_stats, NULL);
1346		if (evsel) {
1347			evsel->pmu_name = name;
1348			evsel->use_uncore_alias = use_uncore_alias;
1349			return 0;
1350		} else {
1351			return -ENOMEM;
1352		}
1353	}
1354
1355	if (perf_pmu__check_alias(pmu, head_config, &info))
1356		return -EINVAL;
1357
1358	/*
1359	 * Configure hardcoded terms first, no need to check
1360	 * return value when called with fail == 0 ;)
1361	 */
1362	if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1363		return -EINVAL;
1364
1365	if (get_config_terms(head_config, &config_terms))
1366		return -ENOMEM;
1367
1368	if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1369		return -EINVAL;
1370
1371	evsel = __add_event(list, &parse_state->idx, &attr,
1372			    get_config_name(head_config), pmu,
1373			    &config_terms, auto_merge_stats, NULL);
1374	if (evsel) {
1375		evsel->unit = info.unit;
1376		evsel->scale = info.scale;
1377		evsel->per_pkg = info.per_pkg;
1378		evsel->snapshot = info.snapshot;
1379		evsel->metric_expr = info.metric_expr;
1380		evsel->metric_name = info.metric_name;
1381		evsel->pmu_name = name;
1382		evsel->use_uncore_alias = use_uncore_alias;
1383		evsel->percore = config_term_percore(&evsel->config_terms);
1384	}
1385
1386	return evsel ? 0 : -ENOMEM;
1387}
1388
1389int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1390			       char *str, struct list_head **listp)
1391{
1392	struct list_head *head;
1393	struct parse_events_term *term;
1394	struct list_head *list;
1395	struct perf_pmu *pmu = NULL;
1396	int ok = 0;
1397
1398	*listp = NULL;
1399	/* Add it for all PMUs that support the alias */
1400	list = malloc(sizeof(struct list_head));
1401	if (!list)
1402		return -1;
1403	INIT_LIST_HEAD(list);
1404	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1405		struct perf_pmu_alias *alias;
1406
1407		list_for_each_entry(alias, &pmu->aliases, list) {
1408			if (!strcasecmp(alias->name, str)) {
1409				head = malloc(sizeof(struct list_head));
1410				if (!head)
1411					return -1;
1412				INIT_LIST_HEAD(head);
1413				if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1414							   str, 1, false, &str, NULL) < 0)
1415					return -1;
1416				list_add_tail(&term->list, head);
1417
1418				if (!parse_events_add_pmu(parse_state, list,
1419							  pmu->name, head,
1420							  true, true)) {
1421					pr_debug("%s -> %s/%s/\n", str,
1422						 pmu->name, alias->str);
1423					ok++;
1424				}
1425
1426				parse_events_terms__delete(head);
1427			}
1428		}
1429	}
1430	if (!ok)
1431		return -1;
1432	*listp = list;
1433	return 0;
1434}
1435
1436int parse_events__modifier_group(struct list_head *list,
1437				 char *event_mod)
1438{
1439	return parse_events__modifier_event(list, event_mod, true);
1440}
1441
1442/*
1443 * Check if the two uncore PMUs are from the same uncore block
1444 * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1445 */
1446static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1447{
1448	char *end_a, *end_b;
1449
1450	end_a = strrchr(pmu_name_a, '_');
1451	end_b = strrchr(pmu_name_b, '_');
1452
1453	if (!end_a || !end_b)
1454		return false;
1455
1456	if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1457		return false;
1458
1459	return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1460}
1461
1462static int
1463parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1464					   struct parse_events_state *parse_state)
1465{
1466	struct evsel *evsel, *leader;
1467	uintptr_t *leaders;
1468	bool is_leader = true;
1469	int i, nr_pmu = 0, total_members, ret = 0;
1470
1471	leader = list_first_entry(list, struct evsel, core.node);
1472	evsel = list_last_entry(list, struct evsel, core.node);
1473	total_members = evsel->idx - leader->idx + 1;
1474
1475	leaders = calloc(total_members, sizeof(uintptr_t));
1476	if (WARN_ON(!leaders))
1477		return 0;
1478
1479	/*
1480	 * Going through the whole group and doing sanity check.
1481	 * All members must use alias, and be from the same uncore block.
1482	 * Also, storing the leader events in an array.
1483	 */
1484	__evlist__for_each_entry(list, evsel) {
1485
1486		/* Only split the uncore group which members use alias */
1487		if (!evsel->use_uncore_alias)
1488			goto out;
1489
1490		/* The events must be from the same uncore block */
1491		if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1492			goto out;
1493
1494		if (!is_leader)
1495			continue;
1496		/*
1497		 * If the event's PMU name starts to repeat, it must be a new
1498		 * event. That can be used to distinguish the leader from
1499		 * other members, even they have the same event name.
1500		 */
1501		if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1502			is_leader = false;
1503			continue;
1504		}
1505		/* The name is always alias name */
1506		WARN_ON(strcmp(leader->name, evsel->name));
1507
1508		/* Store the leader event for each PMU */
1509		leaders[nr_pmu++] = (uintptr_t) evsel;
1510	}
1511
1512	/* only one event alias */
1513	if (nr_pmu == total_members) {
1514		parse_state->nr_groups--;
1515		goto handled;
1516	}
1517
1518	/*
1519	 * An uncore event alias is a joint name which means the same event
1520	 * runs on all PMUs of a block.
1521	 * Perf doesn't support mixed events from different PMUs in the same
1522	 * group. The big group has to be split into multiple small groups
1523	 * which only include the events from the same PMU.
1524	 *
1525	 * Here the uncore event aliases must be from the same uncore block.
1526	 * The number of PMUs must be same for each alias. The number of new
1527	 * small groups equals to the number of PMUs.
1528	 * Setting the leader event for corresponding members in each group.
1529	 */
1530	i = 0;
1531	__evlist__for_each_entry(list, evsel) {
1532		if (i >= nr_pmu)
1533			i = 0;
1534		evsel->leader = (struct evsel *) leaders[i++];
1535	}
1536
1537	/* The number of members and group name are same for each group */
1538	for (i = 0; i < nr_pmu; i++) {
1539		evsel = (struct evsel *) leaders[i];
1540		evsel->core.nr_members = total_members / nr_pmu;
1541		evsel->group_name = name ? strdup(name) : NULL;
1542	}
1543
1544	/* Take the new small groups into account */
1545	parse_state->nr_groups += nr_pmu - 1;
1546
1547handled:
1548	ret = 1;
1549out:
1550	free(leaders);
1551	return ret;
1552}
1553
1554void parse_events__set_leader(char *name, struct list_head *list,
1555			      struct parse_events_state *parse_state)
1556{
1557	struct evsel *leader;
1558
1559	if (list_empty(list)) {
1560		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1561		return;
1562	}
1563
1564	if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1565		return;
1566
1567	__perf_evlist__set_leader(list);
1568	leader = list_entry(list->next, struct evsel, core.node);
1569	leader->group_name = name ? strdup(name) : NULL;
1570}
1571
1572/* list_event is assumed to point to malloc'ed memory */
1573void parse_events_update_lists(struct list_head *list_event,
1574			       struct list_head *list_all)
1575{
1576	/*
1577	 * Called for single event definition. Update the
1578	 * 'all event' list, and reinit the 'single event'
1579	 * list, for next event definition.
1580	 */
1581	list_splice_tail(list_event, list_all);
1582	free(list_event);
1583}
1584
1585struct event_modifier {
1586	int eu;
1587	int ek;
1588	int eh;
1589	int eH;
1590	int eG;
1591	int eI;
1592	int precise;
1593	int precise_max;
1594	int exclude_GH;
1595	int sample_read;
1596	int pinned;
1597	int weak;
1598};
1599
1600static int get_event_modifier(struct event_modifier *mod, char *str,
1601			       struct evsel *evsel)
1602{
1603	int eu = evsel ? evsel->core.attr.exclude_user : 0;
1604	int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1605	int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1606	int eH = evsel ? evsel->core.attr.exclude_host : 0;
1607	int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1608	int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1609	int precise = evsel ? evsel->core.attr.precise_ip : 0;
1610	int precise_max = 0;
1611	int sample_read = 0;
1612	int pinned = evsel ? evsel->core.attr.pinned : 0;
1613
1614	int exclude = eu | ek | eh;
1615	int exclude_GH = evsel ? evsel->exclude_GH : 0;
1616	int weak = 0;
1617
1618	memset(mod, 0, sizeof(*mod));
1619
1620	while (*str) {
1621		if (*str == 'u') {
1622			if (!exclude)
1623				exclude = eu = ek = eh = 1;
1624			eu = 0;
1625		} else if (*str == 'k') {
1626			if (!exclude)
1627				exclude = eu = ek = eh = 1;
1628			ek = 0;
1629		} else if (*str == 'h') {
1630			if (!exclude)
1631				exclude = eu = ek = eh = 1;
1632			eh = 0;
1633		} else if (*str == 'G') {
1634			if (!exclude_GH)
1635				exclude_GH = eG = eH = 1;
1636			eG = 0;
1637		} else if (*str == 'H') {
1638			if (!exclude_GH)
1639				exclude_GH = eG = eH = 1;
1640			eH = 0;
1641		} else if (*str == 'I') {
1642			eI = 1;
1643		} else if (*str == 'p') {
1644			precise++;
1645			/* use of precise requires exclude_guest */
1646			if (!exclude_GH)
1647				eG = 1;
1648		} else if (*str == 'P') {
1649			precise_max = 1;
1650		} else if (*str == 'S') {
1651			sample_read = 1;
1652		} else if (*str == 'D') {
1653			pinned = 1;
1654		} else if (*str == 'W') {
1655			weak = 1;
1656		} else
1657			break;
1658
1659		++str;
1660	}
1661
1662	/*
1663	 * precise ip:
1664	 *
1665	 *  0 - SAMPLE_IP can have arbitrary skid
1666	 *  1 - SAMPLE_IP must have constant skid
1667	 *  2 - SAMPLE_IP requested to have 0 skid
1668	 *  3 - SAMPLE_IP must have 0 skid
1669	 *
1670	 *  See also PERF_RECORD_MISC_EXACT_IP
1671	 */
1672	if (precise > 3)
1673		return -EINVAL;
1674
1675	mod->eu = eu;
1676	mod->ek = ek;
1677	mod->eh = eh;
1678	mod->eH = eH;
1679	mod->eG = eG;
1680	mod->eI = eI;
1681	mod->precise = precise;
1682	mod->precise_max = precise_max;
1683	mod->exclude_GH = exclude_GH;
1684	mod->sample_read = sample_read;
1685	mod->pinned = pinned;
1686	mod->weak = weak;
1687
1688	return 0;
1689}
1690
1691/*
1692 * Basic modifier sanity check to validate it contains only one
1693 * instance of any modifier (apart from 'p') present.
1694 */
1695static int check_modifier(char *str)
1696{
1697	char *p = str;
1698
1699	/* The sizeof includes 0 byte as well. */
1700	if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1701		return -1;
1702
1703	while (*p) {
1704		if (*p != 'p' && strchr(p + 1, *p))
1705			return -1;
1706		p++;
1707	}
1708
1709	return 0;
1710}
1711
1712int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1713{
1714	struct evsel *evsel;
1715	struct event_modifier mod;
1716
1717	if (str == NULL)
1718		return 0;
1719
1720	if (check_modifier(str))
1721		return -EINVAL;
1722
1723	if (!add && get_event_modifier(&mod, str, NULL))
1724		return -EINVAL;
1725
1726	__evlist__for_each_entry(list, evsel) {
1727		if (add && get_event_modifier(&mod, str, evsel))
1728			return -EINVAL;
1729
1730		evsel->core.attr.exclude_user   = mod.eu;
1731		evsel->core.attr.exclude_kernel = mod.ek;
1732		evsel->core.attr.exclude_hv     = mod.eh;
1733		evsel->core.attr.precise_ip     = mod.precise;
1734		evsel->core.attr.exclude_host   = mod.eH;
1735		evsel->core.attr.exclude_guest  = mod.eG;
1736		evsel->core.attr.exclude_idle   = mod.eI;
1737		evsel->exclude_GH          = mod.exclude_GH;
1738		evsel->sample_read         = mod.sample_read;
1739		evsel->precise_max         = mod.precise_max;
1740		evsel->weak_group	   = mod.weak;
1741
1742		if (perf_evsel__is_group_leader(evsel))
1743			evsel->core.attr.pinned = mod.pinned;
1744	}
1745
1746	return 0;
1747}
1748
1749int parse_events_name(struct list_head *list, char *name)
1750{
1751	struct evsel *evsel;
1752
1753	__evlist__for_each_entry(list, evsel) {
1754		if (!evsel->name)
1755			evsel->name = strdup(name);
1756	}
1757
1758	return 0;
1759}
1760
1761static int
1762comp_pmu(const void *p1, const void *p2)
1763{
1764	struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1765	struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1766
1767	return strcasecmp(pmu1->symbol, pmu2->symbol);
1768}
1769
1770static void perf_pmu__parse_cleanup(void)
1771{
1772	if (perf_pmu_events_list_num > 0) {
1773		struct perf_pmu_event_symbol *p;
1774		int i;
1775
1776		for (i = 0; i < perf_pmu_events_list_num; i++) {
1777			p = perf_pmu_events_list + i;
1778			zfree(&p->symbol);
1779		}
1780		zfree(&perf_pmu_events_list);
1781		perf_pmu_events_list_num = 0;
1782	}
1783}
1784
1785#define SET_SYMBOL(str, stype)		\
1786do {					\
1787	p->symbol = str;		\
1788	if (!p->symbol)			\
1789		goto err;		\
1790	p->type = stype;		\
1791} while (0)
1792
1793/*
1794 * Read the pmu events list from sysfs
1795 * Save it into perf_pmu_events_list
1796 */
1797static void perf_pmu__parse_init(void)
1798{
1799
1800	struct perf_pmu *pmu = NULL;
1801	struct perf_pmu_alias *alias;
1802	int len = 0;
1803
1804	pmu = NULL;
1805	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1806		list_for_each_entry(alias, &pmu->aliases, list) {
1807			if (strchr(alias->name, '-'))
1808				len++;
1809			len++;
1810		}
1811	}
1812
1813	if (len == 0) {
1814		perf_pmu_events_list_num = -1;
1815		return;
1816	}
1817	perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1818	if (!perf_pmu_events_list)
1819		return;
1820	perf_pmu_events_list_num = len;
1821
1822	len = 0;
1823	pmu = NULL;
1824	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1825		list_for_each_entry(alias, &pmu->aliases, list) {
1826			struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1827			char *tmp = strchr(alias->name, '-');
1828
1829			if (tmp != NULL) {
1830				SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1831						PMU_EVENT_SYMBOL_PREFIX);
1832				p++;
1833				SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1834				len += 2;
1835			} else {
1836				SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1837				len++;
1838			}
1839		}
1840	}
1841	qsort(perf_pmu_events_list, len,
1842		sizeof(struct perf_pmu_event_symbol), comp_pmu);
1843
1844	return;
1845err:
1846	perf_pmu__parse_cleanup();
1847}
1848
1849enum perf_pmu_event_symbol_type
1850perf_pmu__parse_check(const char *name)
1851{
1852	struct perf_pmu_event_symbol p, *r;
1853
1854	/* scan kernel pmu events from sysfs if needed */
1855	if (perf_pmu_events_list_num == 0)
1856		perf_pmu__parse_init();
1857	/*
1858	 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1859	 * cpu-cycles has been handled by hardcode.
1860	 * So it must be cpu// events, not kernel pmu event.
1861	 */
1862	if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1863		return PMU_EVENT_SYMBOL_ERR;
1864
1865	p.symbol = strdup(name);
1866	r = bsearch(&p, perf_pmu_events_list,
1867			(size_t) perf_pmu_events_list_num,
1868			sizeof(struct perf_pmu_event_symbol), comp_pmu);
1869	zfree(&p.symbol);
1870	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1871}
1872
1873static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1874{
1875	YY_BUFFER_STATE buffer;
1876	void *scanner;
1877	int ret;
1878
1879	ret = parse_events_lex_init_extra(start_token, &scanner);
1880	if (ret)
1881		return ret;
1882
1883	buffer = parse_events__scan_string(str, scanner);
1884
1885#ifdef PARSER_DEBUG
1886	parse_events_debug = 1;
1887#endif
1888	ret = parse_events_parse(parse_state, scanner);
1889
1890	parse_events__flush_buffer(buffer, scanner);
1891	parse_events__delete_buffer(buffer, scanner);
1892	parse_events_lex_destroy(scanner);
 
 
1893	return ret;
1894}
1895
1896/*
1897 * parse event config string, return a list of event terms.
1898 */
1899int parse_events_terms(struct list_head *terms, const char *str)
1900{
1901	struct parse_events_state parse_state = {
1902		.terms = NULL,
1903	};
1904	int ret;
1905
1906	ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1907	if (!ret) {
1908		list_splice(parse_state.terms, terms);
1909		zfree(&parse_state.terms);
1910		return 0;
1911	}
1912
1913	parse_events_terms__delete(parse_state.terms);
 
1914	return ret;
1915}
1916
1917int parse_events(struct evlist *evlist, const char *str,
1918		 struct parse_events_error *err)
1919{
1920	struct parse_events_state parse_state = {
1921		.list   = LIST_HEAD_INIT(parse_state.list),
1922		.idx    = evlist->core.nr_entries,
1923		.error  = err,
1924		.evlist = evlist,
1925	};
1926	int ret;
1927
1928	ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1929	perf_pmu__parse_cleanup();
1930	if (!ret) {
1931		struct evsel *last;
1932
1933		if (list_empty(&parse_state.list)) {
1934			WARN_ONCE(true, "WARNING: event parser found nothing\n");
1935			return -1;
1936		}
1937
1938		perf_evlist__splice_list_tail(evlist, &parse_state.list);
1939		evlist->nr_groups += parse_state.nr_groups;
1940		last = evlist__last(evlist);
1941		last->cmdline_group_boundary = true;
1942
1943		return 0;
1944	}
1945
1946	/*
1947	 * There are 2 users - builtin-record and builtin-test objects.
1948	 * Both call evlist__delete in case of error, so we dont
1949	 * need to bother.
1950	 */
1951	return ret;
1952}
1953
1954#define MAX_WIDTH 1000
1955static int get_term_width(void)
1956{
1957	struct winsize ws;
1958
1959	get_term_dimensions(&ws);
1960	return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1961}
1962
1963void parse_events_print_error(struct parse_events_error *err,
1964			      const char *event)
1965{
1966	const char *str = "invalid or unsupported event: ";
1967	char _buf[MAX_WIDTH];
1968	char *buf = (char *) event;
1969	int idx = 0;
1970
1971	if (err->str) {
1972		/* -2 for extra '' in the final fprintf */
1973		int width       = get_term_width() - 2;
1974		int len_event   = strlen(event);
1975		int len_str, max_len, cut = 0;
1976
1977		/*
1978		 * Maximum error index indent, we will cut
1979		 * the event string if it's bigger.
1980		 */
1981		int max_err_idx = 13;
1982
1983		/*
1984		 * Let's be specific with the message when
1985		 * we have the precise error.
1986		 */
1987		str     = "event syntax error: ";
1988		len_str = strlen(str);
1989		max_len = width - len_str;
1990
1991		buf = _buf;
1992
1993		/* We're cutting from the beginning. */
1994		if (err->idx > max_err_idx)
1995			cut = err->idx - max_err_idx;
1996
1997		strncpy(buf, event + cut, max_len);
1998
1999		/* Mark cut parts with '..' on both sides. */
2000		if (cut)
2001			buf[0] = buf[1] = '.';
2002
2003		if ((len_event - cut) > max_len) {
2004			buf[max_len - 1] = buf[max_len - 2] = '.';
2005			buf[max_len] = 0;
2006		}
2007
2008		idx = len_str + err->idx - cut;
2009	}
2010
2011	fprintf(stderr, "%s'%s'\n", str, buf);
2012	if (idx) {
2013		fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
2014		if (err->help)
2015			fprintf(stderr, "\n%s\n", err->help);
2016		zfree(&err->str);
2017		zfree(&err->help);
2018	}
2019}
2020
2021#undef MAX_WIDTH
2022
2023int parse_events_option(const struct option *opt, const char *str,
2024			int unset __maybe_unused)
2025{
2026	struct evlist *evlist = *(struct evlist **)opt->value;
2027	struct parse_events_error err = { .idx = 0, };
2028	int ret = parse_events(evlist, str, &err);
2029
2030	if (ret) {
2031		parse_events_print_error(&err, str);
2032		fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2033	}
2034
2035	return ret;
2036}
2037
2038static int
2039foreach_evsel_in_last_glob(struct evlist *evlist,
2040			   int (*func)(struct evsel *evsel,
2041				       const void *arg),
2042			   const void *arg)
2043{
2044	struct evsel *last = NULL;
2045	int err;
2046
2047	/*
2048	 * Don't return when list_empty, give func a chance to report
2049	 * error when it found last == NULL.
2050	 *
2051	 * So no need to WARN here, let *func do this.
2052	 */
2053	if (evlist->core.nr_entries > 0)
2054		last = evlist__last(evlist);
2055
2056	do {
2057		err = (*func)(last, arg);
2058		if (err)
2059			return -1;
2060		if (!last)
2061			return 0;
2062
2063		if (last->core.node.prev == &evlist->core.entries)
2064			return 0;
2065		last = list_entry(last->core.node.prev, struct evsel, core.node);
2066	} while (!last->cmdline_group_boundary);
2067
2068	return 0;
2069}
2070
2071static int set_filter(struct evsel *evsel, const void *arg)
2072{
2073	const char *str = arg;
2074	bool found = false;
2075	int nr_addr_filters = 0;
2076	struct perf_pmu *pmu = NULL;
2077
2078	if (evsel == NULL) {
2079		fprintf(stderr,
2080			"--filter option should follow a -e tracepoint or HW tracer option\n");
2081		return -1;
2082	}
2083
2084	if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2085		if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2086			fprintf(stderr,
2087				"not enough memory to hold filter string\n");
2088			return -1;
2089		}
2090
2091		return 0;
2092	}
2093
2094	while ((pmu = perf_pmu__scan(pmu)) != NULL)
2095		if (pmu->type == evsel->core.attr.type) {
2096			found = true;
2097			break;
2098		}
2099
2100	if (found)
2101		perf_pmu__scan_file(pmu, "nr_addr_filters",
2102				    "%d", &nr_addr_filters);
2103
2104	if (!nr_addr_filters) {
2105		fprintf(stderr,
2106			"This CPU does not support address filtering\n");
2107		return -1;
2108	}
2109
2110	if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2111		fprintf(stderr,
2112			"not enough memory to hold filter string\n");
2113		return -1;
2114	}
2115
2116	return 0;
2117}
2118
2119int parse_filter(const struct option *opt, const char *str,
2120		 int unset __maybe_unused)
2121{
2122	struct evlist *evlist = *(struct evlist **)opt->value;
 
2123
2124	return foreach_evsel_in_last_glob(evlist, set_filter,
2125					  (const void *)str);
2126}
2127
2128static int add_exclude_perf_filter(struct evsel *evsel,
2129				   const void *arg __maybe_unused)
2130{
2131	char new_filter[64];
2132
2133	if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2134		fprintf(stderr,
2135			"--exclude-perf option should follow a -e tracepoint option\n");
2136		return -1;
2137	}
2138
2139	snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2140
2141	if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2142		fprintf(stderr,
2143			"not enough memory to hold filter string\n");
2144		return -1;
2145	}
2146
2147	return 0;
2148}
2149
2150int exclude_perf(const struct option *opt,
2151		 const char *arg __maybe_unused,
2152		 int unset __maybe_unused)
2153{
2154	struct evlist *evlist = *(struct evlist **)opt->value;
2155
2156	return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2157					  NULL);
2158}
2159
2160static const char * const event_type_descriptors[] = {
2161	"Hardware event",
2162	"Software event",
2163	"Tracepoint event",
2164	"Hardware cache event",
2165	"Raw hardware event descriptor",
2166	"Hardware breakpoint",
2167};
2168
2169static int cmp_string(const void *a, const void *b)
2170{
2171	const char * const *as = a;
2172	const char * const *bs = b;
2173
2174	return strcmp(*as, *bs);
2175}
2176
2177/*
2178 * Print the events from <debugfs_mount_point>/tracing/events
2179 */
2180
2181void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2182			     bool name_only)
2183{
2184	DIR *sys_dir, *evt_dir;
2185	struct dirent *sys_dirent, *evt_dirent;
2186	char evt_path[MAXPATHLEN];
2187	char *dir_path;
2188	char **evt_list = NULL;
2189	unsigned int evt_i = 0, evt_num = 0;
2190	bool evt_num_known = false;
2191
2192restart:
2193	sys_dir = tracing_events__opendir();
2194	if (!sys_dir)
2195		return;
2196
2197	if (evt_num_known) {
2198		evt_list = zalloc(sizeof(char *) * evt_num);
2199		if (!evt_list)
2200			goto out_close_sys_dir;
2201	}
2202
2203	for_each_subsystem(sys_dir, sys_dirent) {
2204		if (subsys_glob != NULL &&
2205		    !strglobmatch(sys_dirent->d_name, subsys_glob))
2206			continue;
2207
2208		dir_path = get_events_file(sys_dirent->d_name);
2209		if (!dir_path)
 
2210			continue;
 
 
 
2211		evt_dir = opendir(dir_path);
2212		if (!evt_dir)
2213			goto next;
2214
2215		for_each_event(dir_path, evt_dir, evt_dirent) {
2216			if (event_glob != NULL &&
2217			    !strglobmatch(evt_dirent->d_name, event_glob))
2218				continue;
2219
2220			if (!evt_num_known) {
2221				evt_num++;
2222				continue;
2223			}
2224
2225			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2226				 sys_dirent->d_name, evt_dirent->d_name);
2227
2228			evt_list[evt_i] = strdup(evt_path);
2229			if (evt_list[evt_i] == NULL) {
2230				put_events_file(dir_path);
2231				goto out_close_evt_dir;
2232			}
2233			evt_i++;
2234		}
2235		closedir(evt_dir);
2236next:
2237		put_events_file(dir_path);
2238	}
2239	closedir(sys_dir);
2240
2241	if (!evt_num_known) {
2242		evt_num_known = true;
2243		goto restart;
2244	}
2245	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2246	evt_i = 0;
2247	while (evt_i < evt_num) {
2248		if (name_only) {
2249			printf("%s ", evt_list[evt_i++]);
2250			continue;
2251		}
2252		printf("  %-50s [%s]\n", evt_list[evt_i++],
2253				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2254	}
2255	if (evt_num && pager_in_use())
2256		printf("\n");
2257
2258out_free:
2259	evt_num = evt_i;
2260	for (evt_i = 0; evt_i < evt_num; evt_i++)
2261		zfree(&evt_list[evt_i]);
2262	zfree(&evt_list);
2263	return;
2264
2265out_close_evt_dir:
2266	closedir(evt_dir);
2267out_close_sys_dir:
2268	closedir(sys_dir);
2269
2270	printf("FATAL: not enough memory to print %s\n",
2271			event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2272	if (evt_list)
2273		goto out_free;
2274}
2275
2276/*
2277 * Check whether event is in <debugfs_mount_point>/tracing/events
2278 */
2279
2280int is_valid_tracepoint(const char *event_string)
2281{
2282	DIR *sys_dir, *evt_dir;
2283	struct dirent *sys_dirent, *evt_dirent;
2284	char evt_path[MAXPATHLEN];
2285	char *dir_path;
 
 
 
2286
2287	sys_dir = tracing_events__opendir();
2288	if (!sys_dir)
2289		return 0;
2290
2291	for_each_subsystem(sys_dir, sys_dirent) {
2292		dir_path = get_events_file(sys_dirent->d_name);
2293		if (!dir_path)
2294			continue;
2295		evt_dir = opendir(dir_path);
2296		if (!evt_dir)
2297			goto next;
2298
2299		for_each_event(dir_path, evt_dir, evt_dirent) {
2300			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2301				 sys_dirent->d_name, evt_dirent->d_name);
2302			if (!strcmp(evt_path, event_string)) {
2303				closedir(evt_dir);
2304				closedir(sys_dir);
2305				return 1;
2306			}
2307		}
2308		closedir(evt_dir);
2309next:
2310		put_events_file(dir_path);
2311	}
2312	closedir(sys_dir);
2313	return 0;
2314}
2315
2316static bool is_event_supported(u8 type, unsigned config)
2317{
2318	bool ret = true;
2319	int open_return;
2320	struct evsel *evsel;
2321	struct perf_event_attr attr = {
2322		.type = type,
2323		.config = config,
2324		.disabled = 1,
2325	};
2326	struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2327
2328	if (tmap == NULL)
2329		return false;
 
 
 
2330
2331	evsel = evsel__new(&attr);
2332	if (evsel) {
2333		open_return = evsel__open(evsel, NULL, tmap);
2334		ret = open_return >= 0;
2335
2336		if (open_return == -EACCES) {
2337			/*
2338			 * This happens if the paranoid value
2339			 * /proc/sys/kernel/perf_event_paranoid is set to 2
2340			 * Re-run with exclude_kernel set; we don't do that
2341			 * by default as some ARM machines do not support it.
2342			 *
2343			 */
2344			evsel->core.attr.exclude_kernel = 1;
2345			ret = evsel__open(evsel, NULL, tmap) >= 0;
2346		}
2347		evsel__delete(evsel);
2348	}
2349
2350	perf_thread_map__put(tmap);
2351	return ret;
2352}
2353
2354void print_sdt_events(const char *subsys_glob, const char *event_glob,
2355		      bool name_only)
2356{
2357	struct probe_cache *pcache;
2358	struct probe_cache_entry *ent;
2359	struct strlist *bidlist, *sdtlist;
2360	struct strlist_config cfg = {.dont_dupstr = true};
2361	struct str_node *nd, *nd2;
2362	char *buf, *path, *ptr = NULL;
2363	bool show_detail = false;
2364	int ret;
2365
2366	sdtlist = strlist__new(NULL, &cfg);
2367	if (!sdtlist) {
2368		pr_debug("Failed to allocate new strlist for SDT\n");
2369		return;
2370	}
2371	bidlist = build_id_cache__list_all(true);
2372	if (!bidlist) {
2373		pr_debug("Failed to get buildids: %d\n", errno);
2374		return;
2375	}
2376	strlist__for_each_entry(nd, bidlist) {
2377		pcache = probe_cache__new(nd->s, NULL);
2378		if (!pcache)
2379			continue;
2380		list_for_each_entry(ent, &pcache->entries, node) {
2381			if (!ent->sdt)
2382				continue;
2383			if (subsys_glob &&
2384			    !strglobmatch(ent->pev.group, subsys_glob))
2385				continue;
2386			if (event_glob &&
2387			    !strglobmatch(ent->pev.event, event_glob))
2388				continue;
2389			ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2390					ent->pev.event, nd->s);
2391			if (ret > 0)
2392				strlist__add(sdtlist, buf);
2393		}
2394		probe_cache__delete(pcache);
2395	}
2396	strlist__delete(bidlist);
2397
2398	strlist__for_each_entry(nd, sdtlist) {
2399		buf = strchr(nd->s, '@');
2400		if (buf)
2401			*(buf++) = '\0';
2402		if (name_only) {
2403			printf("%s ", nd->s);
2404			continue;
2405		}
2406		nd2 = strlist__next(nd);
2407		if (nd2) {
2408			ptr = strchr(nd2->s, '@');
2409			if (ptr)
2410				*ptr = '\0';
2411			if (strcmp(nd->s, nd2->s) == 0)
2412				show_detail = true;
2413		}
2414		if (show_detail) {
2415			path = build_id_cache__origname(buf);
2416			ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2417			if (ret > 0) {
2418				printf("  %-50s [%s]\n", buf, "SDT event");
2419				free(buf);
2420			}
2421			free(path);
2422		} else
2423			printf("  %-50s [%s]\n", nd->s, "SDT event");
2424		if (nd2) {
2425			if (strcmp(nd->s, nd2->s) != 0)
2426				show_detail = false;
2427			if (ptr)
2428				*ptr = '@';
2429		}
2430	}
2431	strlist__delete(sdtlist);
 
 
 
 
 
 
 
2432}
2433
2434int print_hwcache_events(const char *event_glob, bool name_only)
2435{
2436	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2437	char name[64];
2438	char **evt_list = NULL;
2439	bool evt_num_known = false;
2440
2441restart:
2442	if (evt_num_known) {
2443		evt_list = zalloc(sizeof(char *) * evt_num);
2444		if (!evt_list)
2445			goto out_enomem;
2446	}
2447
2448	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2449		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2450			/* skip invalid cache type */
2451			if (!perf_evsel__is_cache_op_valid(type, op))
2452				continue;
2453
2454			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2455				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
2456									name, sizeof(name));
2457				if (event_glob != NULL && !strglobmatch(name, event_glob))
2458					continue;
2459
2460				if (!is_event_supported(PERF_TYPE_HW_CACHE,
2461							type | (op << 8) | (i << 16)))
2462					continue;
2463
2464				if (!evt_num_known) {
2465					evt_num++;
2466					continue;
2467				}
2468
2469				evt_list[evt_i] = strdup(name);
2470				if (evt_list[evt_i] == NULL)
2471					goto out_enomem;
2472				evt_i++;
2473			}
2474		}
2475	}
2476
2477	if (!evt_num_known) {
2478		evt_num_known = true;
2479		goto restart;
2480	}
2481	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2482	evt_i = 0;
2483	while (evt_i < evt_num) {
2484		if (name_only) {
2485			printf("%s ", evt_list[evt_i++]);
2486			continue;
2487		}
2488		printf("  %-50s [%s]\n", evt_list[evt_i++],
2489				event_type_descriptors[PERF_TYPE_HW_CACHE]);
2490	}
2491	if (evt_num && pager_in_use())
2492		printf("\n");
2493
2494out_free:
2495	evt_num = evt_i;
2496	for (evt_i = 0; evt_i < evt_num; evt_i++)
2497		zfree(&evt_list[evt_i]);
2498	zfree(&evt_list);
2499	return evt_num;
2500
2501out_enomem:
2502	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2503	if (evt_list)
2504		goto out_free;
2505	return evt_num;
2506}
2507
2508static void print_tool_event(const char *name, const char *event_glob,
2509			     bool name_only)
2510{
2511	if (event_glob && !strglobmatch(name, event_glob))
2512		return;
2513	if (name_only)
2514		printf("%s ", name);
2515	else
2516		printf("  %-50s [%s]\n", name, "Tool event");
2517
2518}
2519
2520void print_tool_events(const char *event_glob, bool name_only)
2521{
2522	print_tool_event("duration_time", event_glob, name_only);
2523	if (pager_in_use())
2524		printf("\n");
2525}
2526
2527void print_symbol_events(const char *event_glob, unsigned type,
2528				struct event_symbol *syms, unsigned max,
2529				bool name_only)
2530{
2531	unsigned int i, evt_i = 0, evt_num = 0;
2532	char name[MAX_NAME_LEN];
2533	char **evt_list = NULL;
2534	bool evt_num_known = false;
2535
2536restart:
2537	if (evt_num_known) {
2538		evt_list = zalloc(sizeof(char *) * evt_num);
2539		if (!evt_list)
2540			goto out_enomem;
2541		syms -= max;
2542	}
2543
2544	for (i = 0; i < max; i++, syms++) {
2545
2546		if (event_glob != NULL && syms->symbol != NULL &&
2547		    !(strglobmatch(syms->symbol, event_glob) ||
2548		      (syms->alias && strglobmatch(syms->alias, event_glob))))
2549			continue;
2550
2551		if (!is_event_supported(type, i))
2552			continue;
2553
2554		if (!evt_num_known) {
2555			evt_num++;
2556			continue;
2557		}
2558
2559		if (!name_only && strlen(syms->alias))
2560			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2561		else
2562			strlcpy(name, syms->symbol, MAX_NAME_LEN);
2563
2564		evt_list[evt_i] = strdup(name);
2565		if (evt_list[evt_i] == NULL)
2566			goto out_enomem;
2567		evt_i++;
2568	}
2569
2570	if (!evt_num_known) {
2571		evt_num_known = true;
2572		goto restart;
2573	}
2574	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2575	evt_i = 0;
2576	while (evt_i < evt_num) {
2577		if (name_only) {
2578			printf("%s ", evt_list[evt_i++]);
2579			continue;
2580		}
2581		printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2582	}
2583	if (evt_num && pager_in_use())
2584		printf("\n");
2585
2586out_free:
2587	evt_num = evt_i;
2588	for (evt_i = 0; evt_i < evt_num; evt_i++)
2589		zfree(&evt_list[evt_i]);
2590	zfree(&evt_list);
2591	return;
2592
2593out_enomem:
2594	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2595	if (evt_list)
2596		goto out_free;
2597}
2598
2599/*
2600 * Print the help text for the event symbols:
2601 */
2602void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2603			bool long_desc, bool details_flag)
2604{
 
 
 
 
 
2605	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2606			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2607
2608	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2609			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2610	print_tool_events(event_glob, name_only);
2611
2612	print_hwcache_events(event_glob, name_only);
2613
2614	print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2615			details_flag);
2616
2617	if (event_glob != NULL)
2618		return;
2619
2620	if (!name_only) {
2621		printf("  %-50s [%s]\n",
2622		       "rNNN",
2623		       event_type_descriptors[PERF_TYPE_RAW]);
2624		printf("  %-50s [%s]\n",
2625		       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2626		       event_type_descriptors[PERF_TYPE_RAW]);
2627		if (pager_in_use())
2628			printf("   (see 'man perf-list' on how to encode it)\n\n");
2629
2630		printf("  %-50s [%s]\n",
2631		       "mem:<addr>[/len][:access]",
2632			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2633		if (pager_in_use())
2634			printf("\n");
2635	}
2636
2637	print_tracepoint_events(NULL, NULL, name_only);
2638
2639	print_sdt_events(NULL, NULL, name_only);
2640
2641	metricgroup__print(true, true, NULL, name_only, details_flag);
2642}
2643
2644int parse_events__is_hardcoded_term(struct parse_events_term *term)
2645{
2646	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2647}
2648
2649static int new_term(struct parse_events_term **_term,
2650		    struct parse_events_term *temp,
2651		    char *str, u64 num)
2652{
2653	struct parse_events_term *term;
2654
2655	term = malloc(sizeof(*term));
2656	if (!term)
2657		return -ENOMEM;
2658
2659	*term = *temp;
2660	INIT_LIST_HEAD(&term->list);
2661	term->weak = false;
 
 
2662
2663	switch (term->type_val) {
2664	case PARSE_EVENTS__TERM_TYPE_NUM:
2665		term->val.num = num;
2666		break;
2667	case PARSE_EVENTS__TERM_TYPE_STR:
2668		term->val.str = str;
2669		break;
2670	default:
2671		free(term);
2672		return -EINVAL;
2673	}
2674
2675	*_term = term;
2676	return 0;
2677}
2678
2679int parse_events_term__num(struct parse_events_term **term,
2680			   int type_term, char *config, u64 num,
2681			   bool no_value,
2682			   void *loc_term_, void *loc_val_)
2683{
2684	YYLTYPE *loc_term = loc_term_;
2685	YYLTYPE *loc_val = loc_val_;
2686
2687	struct parse_events_term temp = {
2688		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2689		.type_term = type_term,
2690		.config    = config,
2691		.no_value  = no_value,
2692		.err_term  = loc_term ? loc_term->first_column : 0,
2693		.err_val   = loc_val  ? loc_val->first_column  : 0,
2694	};
2695
2696	return new_term(term, &temp, NULL, num);
2697}
2698
2699int parse_events_term__str(struct parse_events_term **term,
2700			   int type_term, char *config, char *str,
2701			   void *loc_term_, void *loc_val_)
2702{
2703	YYLTYPE *loc_term = loc_term_;
2704	YYLTYPE *loc_val = loc_val_;
2705
2706	struct parse_events_term temp = {
2707		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2708		.type_term = type_term,
2709		.config    = config,
2710		.err_term  = loc_term ? loc_term->first_column : 0,
2711		.err_val   = loc_val  ? loc_val->first_column  : 0,
2712	};
2713
2714	return new_term(term, &temp, str, 0);
2715}
2716
2717int parse_events_term__sym_hw(struct parse_events_term **term,
2718			      char *config, unsigned idx)
2719{
2720	struct event_symbol *sym;
2721	struct parse_events_term temp = {
2722		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2723		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
2724		.config    = config ?: (char *) "event",
2725	};
2726
2727	BUG_ON(idx >= PERF_COUNT_HW_MAX);
2728	sym = &event_symbols_hw[idx];
2729
2730	return new_term(term, &temp, (char *) sym->symbol, 0);
 
 
 
 
 
 
 
2731}
2732
2733int parse_events_term__clone(struct parse_events_term **new,
2734			     struct parse_events_term *term)
2735{
2736	struct parse_events_term temp = {
2737		.type_val  = term->type_val,
2738		.type_term = term->type_term,
2739		.config    = term->config,
2740		.err_term  = term->err_term,
2741		.err_val   = term->err_val,
2742	};
2743
2744	return new_term(new, &temp, term->val.str, term->val.num);
2745}
2746
2747int parse_events_copy_term_list(struct list_head *old,
2748				 struct list_head **new)
2749{
2750	struct parse_events_term *term, *n;
2751	int ret;
2752
2753	if (!old) {
2754		*new = NULL;
2755		return 0;
2756	}
2757
2758	*new = malloc(sizeof(struct list_head));
2759	if (!*new)
2760		return -ENOMEM;
2761	INIT_LIST_HEAD(*new);
2762
2763	list_for_each_entry (term, old, list) {
2764		ret = parse_events_term__clone(&n, term);
2765		if (ret)
2766			return ret;
2767		list_add_tail(&n->list, *new);
2768	}
2769	return 0;
2770}
2771
2772void parse_events_terms__purge(struct list_head *terms)
2773{
2774	struct parse_events_term *term, *h;
2775
2776	list_for_each_entry_safe(term, h, terms, list) {
2777		if (term->array.nr_ranges)
2778			zfree(&term->array.ranges);
2779		list_del_init(&term->list);
2780		free(term);
2781	}
2782}
2783
2784void parse_events_terms__delete(struct list_head *terms)
2785{
2786	if (!terms)
2787		return;
2788	parse_events_terms__purge(terms);
2789	free(terms);
2790}
2791
2792void parse_events__clear_array(struct parse_events_array *a)
2793{
2794	zfree(&a->ranges);
2795}
2796
2797void parse_events_evlist_error(struct parse_events_state *parse_state,
2798			       int idx, const char *str)
2799{
2800	struct parse_events_error *err = parse_state->error;
2801
2802	if (!err)
2803		return;
2804	err->idx = idx;
2805	err->str = strdup(str);
2806	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2807}
2808
2809static void config_terms_list(char *buf, size_t buf_sz)
2810{
2811	int i;
2812	bool first = true;
2813
2814	buf[0] = '\0';
2815	for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2816		const char *name = config_term_names[i];
2817
2818		if (!config_term_avail(i, NULL))
2819			continue;
2820		if (!name)
2821			continue;
2822		if (name[0] == '<')
2823			continue;
2824
2825		if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2826			return;
2827
2828		if (!first)
2829			strcat(buf, ",");
2830		else
2831			first = false;
2832		strcat(buf, name);
2833	}
2834}
2835
2836/*
2837 * Return string contains valid config terms of an event.
2838 * @additional_terms: For terms such as PMU sysfs terms.
2839 */
2840char *parse_events_formats_error_string(char *additional_terms)
2841{
2842	char *str;
2843	/* "no-overwrite" is the longest name */
2844	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2845			  (sizeof("no-overwrite") - 1)];
2846
2847	config_terms_list(static_terms, sizeof(static_terms));
2848	/* valid terms */
2849	if (additional_terms) {
2850		if (asprintf(&str, "valid terms: %s,%s",
2851			     additional_terms, static_terms) < 0)
2852			goto fail;
2853	} else {
2854		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2855			goto fail;
2856	}
2857	return str;
2858
2859fail:
2860	return NULL;
2861}