1#include "../../../include/linux/hw_breakpoint.h"
   2#include "util.h"
   3#include "../perf.h"
 
 
 
 
 
 
 
 
 
 
   4#include "evlist.h"
   5#include "evsel.h"
   6#include "parse-options.h"
 
   7#include "parse-events.h"
   8#include "exec_cmd.h"
   9#include "string.h"
 
  10#include "symbol.h"
  11#include "cache.h"
  12#include "header.h"
  13#include "debugfs.h"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  14
  15struct event_symbol {
  16	u8		type;
  17	u64		config;
  18	const char	*symbol;
  19	const char	*alias;
  20};
  21
  22enum event_result {
  23	EVT_FAILED,
  24	EVT_HANDLED,
  25	EVT_HANDLED_ALL
  26};
 
  27
  28char debugfs_path[MAXPATHLEN];
 
 
 
 
 
 
 
  29
  30#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
  31#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  32
  33static struct event_symbol event_symbols[] = {
  34  { CHW(CPU_CYCLES),			"cpu-cycles",			"cycles"		},
  35  { CHW(STALLED_CYCLES_FRONTEND),	"stalled-cycles-frontend",	"idle-cycles-frontend"	},
  36  { CHW(STALLED_CYCLES_BACKEND),	"stalled-cycles-backend",	"idle-cycles-backend"	},
  37  { CHW(INSTRUCTIONS),			"instructions",			""			},
  38  { CHW(CACHE_REFERENCES),		"cache-references",		""			},
  39  { CHW(CACHE_MISSES),			"cache-misses",			""			},
  40  { CHW(BRANCH_INSTRUCTIONS),		"branch-instructions",		"branches"		},
  41  { CHW(BRANCH_MISSES),			"branch-misses",		""			},
  42  { CHW(BUS_CYCLES),			"bus-cycles",			""			},
  43
  44  { CSW(CPU_CLOCK),			"cpu-clock",			""			},
  45  { CSW(TASK_CLOCK),			"task-clock",			""			},
  46  { CSW(PAGE_FAULTS),			"page-faults",			"faults"		},
  47  { CSW(PAGE_FAULTS_MIN),		"minor-faults",			""			},
  48  { CSW(PAGE_FAULTS_MAJ),		"major-faults",			""			},
  49  { CSW(CONTEXT_SWITCHES),		"context-switches",		"cs"			},
  50  { CSW(CPU_MIGRATIONS),		"cpu-migrations",		"migrations"		},
  51  { CSW(ALIGNMENT_FAULTS),		"alignment-faults",		""			},
  52  { CSW(EMULATION_FAULTS),		"emulation-faults",		""			},
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  53};
  54
  55#define __PERF_EVENT_FIELD(config, name) \
  56	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
  57
  58#define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
  59#define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
  60#define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
  61#define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)
  62
  63static const char *hw_event_names[PERF_COUNT_HW_MAX] = {
  64	"cycles",
  65	"instructions",
  66	"cache-references",
  67	"cache-misses",
  68	"branches",
  69	"branch-misses",
  70	"bus-cycles",
  71	"stalled-cycles-frontend",
  72	"stalled-cycles-backend",
  73};
  74
  75static const char *sw_event_names[PERF_COUNT_SW_MAX] = {
  76	"cpu-clock",
  77	"task-clock",
  78	"page-faults",
  79	"context-switches",
  80	"CPU-migrations",
  81	"minor-faults",
  82	"major-faults",
  83	"alignment-faults",
  84	"emulation-faults",
  85};
  86
  87#define MAX_ALIASES 8
  88
  89static const char *hw_cache[PERF_COUNT_HW_CACHE_MAX][MAX_ALIASES] = {
  90 { "L1-dcache",	"l1-d",		"l1d",		"L1-data",		},
  91 { "L1-icache",	"l1-i",		"l1i",		"L1-instruction",	},
  92 { "LLC",	"L2",							},
  93 { "dTLB",	"d-tlb",	"Data-TLB",				},
  94 { "iTLB",	"i-tlb",	"Instruction-TLB",			},
  95 { "branch",	"branches",	"bpu",		"btb",		"bpc",	},
  96 { "node",								},
  97};
  98
  99static const char *hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][MAX_ALIASES] = {
 100 { "load",	"loads",	"read",					},
 101 { "store",	"stores",	"write",				},
 102 { "prefetch",	"prefetches",	"speculative-read", "speculative-load",	},
 103};
 104
 105static const char *hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
 106				  [MAX_ALIASES] = {
 107 { "refs",	"Reference",	"ops",		"access",		},
 108 { "misses",	"miss",							},
 109};
 110
 111#define C(x)		PERF_COUNT_HW_CACHE_##x
 112#define CACHE_READ	(1 << C(OP_READ))
 113#define CACHE_WRITE	(1 << C(OP_WRITE))
 114#define CACHE_PREFETCH	(1 << C(OP_PREFETCH))
 115#define COP(x)		(1 << x)
 116
 117/*
 118 * cache operartion stat
 119 * L1I : Read and prefetch only
 120 * ITLB and BPU : Read-only
 121 */
 122static unsigned long hw_cache_stat[C(MAX)] = {
 123 [C(L1D)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 124 [C(L1I)]	= (CACHE_READ | CACHE_PREFETCH),
 125 [C(LL)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 126 [C(DTLB)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 127 [C(ITLB)]	= (CACHE_READ),
 128 [C(BPU)]	= (CACHE_READ),
 129 [C(NODE)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 130};
 131
 132#define for_each_subsystem(sys_dir, sys_dirent, sys_next)	       \
 133	while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)	       \
 134	if (sys_dirent.d_type == DT_DIR &&				       \
 135	   (strcmp(sys_dirent.d_name, ".")) &&				       \
 136	   (strcmp(sys_dirent.d_name, "..")))
 137
 138static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 139{
 140	char evt_path[MAXPATHLEN];
 141	int fd;
 142
 143	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 144			sys_dir->d_name, evt_dir->d_name);
 145	fd = open(evt_path, O_RDONLY);
 146	if (fd < 0)
 147		return -EINVAL;
 148	close(fd);
 149
 150	return 0;
 151}
 152
 153#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)	       \
 154	while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 155	if (evt_dirent.d_type == DT_DIR &&				       \
 156	   (strcmp(evt_dirent.d_name, ".")) &&				       \
 157	   (strcmp(evt_dirent.d_name, "..")) &&				       \
 158	   (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 159
 160#define MAX_EVENT_LENGTH 512
 161
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 162
 163struct tracepoint_path *tracepoint_id_to_path(u64 config)
 164{
 165	struct tracepoint_path *path = NULL;
 166	DIR *sys_dir, *evt_dir;
 167	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 168	char id_buf[4];
 169	int fd;
 170	u64 id;
 171	char evt_path[MAXPATHLEN];
 172	char dir_path[MAXPATHLEN];
 173
 174	if (debugfs_valid_mountpoint(debugfs_path))
 175		return NULL;
 176
 177	sys_dir = opendir(debugfs_path);
 178	if (!sys_dir)
 179		return NULL;
 180
 181	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 182
 183		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 184			 sys_dirent.d_name);
 185		evt_dir = opendir(dir_path);
 186		if (!evt_dir)
 187			continue;
 188
 189		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 190
 191			snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
 192				 evt_dirent.d_name);
 193			fd = open(evt_path, O_RDONLY);
 194			if (fd < 0)
 195				continue;
 196			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 197				close(fd);
 198				continue;
 199			}
 200			close(fd);
 201			id = atoll(id_buf);
 202			if (id == config) {
 
 203				closedir(evt_dir);
 204				closedir(sys_dir);
 205				path = zalloc(sizeof(*path));
 206				path->system = malloc(MAX_EVENT_LENGTH);
 207				if (!path->system) {
 
 208					free(path);
 209					return NULL;
 210				}
 211				path->name = malloc(MAX_EVENT_LENGTH);
 212				if (!path->name) {
 213					free(path->system);
 214					free(path);
 215					return NULL;
 216				}
 217				strncpy(path->system, sys_dirent.d_name,
 218					MAX_EVENT_LENGTH);
 219				strncpy(path->name, evt_dirent.d_name,
 220					MAX_EVENT_LENGTH);
 221				return path;
 222			}
 223		}
 224		closedir(evt_dir);
 
 
 225	}
 226
 227	closedir(sys_dir);
 228	return NULL;
 229}
 230
 231#define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
 232static const char *tracepoint_id_to_name(u64 config)
 233{
 234	static char buf[TP_PATH_LEN];
 235	struct tracepoint_path *path;
 236
 237	path = tracepoint_id_to_path(config);
 238	if (path) {
 239		snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
 240		free(path->name);
 241		free(path->system);
 242		free(path);
 243	} else
 244		snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
 245
 246	return buf;
 247}
 248
 249static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 250{
 251	if (hw_cache_stat[cache_type] & COP(cache_op))
 252		return 1;	/* valid */
 253	else
 254		return 0;	/* invalid */
 255}
 256
 257static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 258{
 259	static char name[50];
 260
 261	if (cache_result) {
 262		sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 263			hw_cache_op[cache_op][0],
 264			hw_cache_result[cache_result][0]);
 265	} else {
 266		sprintf(name, "%s-%s", hw_cache[cache_type][0],
 267			hw_cache_op[cache_op][1]);
 268	}
 269
 270	return name;
 271}
 272
 273const char *event_type(int type)
 274{
 275	switch (type) {
 276	case PERF_TYPE_HARDWARE:
 277		return "hardware";
 278
 279	case PERF_TYPE_SOFTWARE:
 280		return "software";
 281
 282	case PERF_TYPE_TRACEPOINT:
 283		return "tracepoint";
 284
 285	case PERF_TYPE_HW_CACHE:
 286		return "hardware-cache";
 287
 288	default:
 289		break;
 290	}
 291
 292	return "unknown";
 293}
 294
 295const char *event_name(struct perf_evsel *evsel)
 296{
 297	u64 config = evsel->attr.config;
 298	int type = evsel->attr.type;
 299
 300	if (evsel->name)
 301		return evsel->name;
 302
 303	return __event_name(type, config);
 304}
 305
 306const char *__event_name(int type, u64 config)
 307{
 308	static char buf[32];
 309
 310	if (type == PERF_TYPE_RAW) {
 311		sprintf(buf, "raw 0x%" PRIx64, config);
 312		return buf;
 313	}
 314
 315	switch (type) {
 316	case PERF_TYPE_HARDWARE:
 317		if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
 318			return hw_event_names[config];
 319		return "unknown-hardware";
 320
 321	case PERF_TYPE_HW_CACHE: {
 322		u8 cache_type, cache_op, cache_result;
 323
 324		cache_type   = (config >>  0) & 0xff;
 325		if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 326			return "unknown-ext-hardware-cache-type";
 
 
 
 
 
 
 
 
 327
 328		cache_op     = (config >>  8) & 0xff;
 329		if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 330			return "unknown-ext-hardware-cache-op";
 331
 332		cache_result = (config >> 16) & 0xff;
 333		if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 334			return "unknown-ext-hardware-cache-result";
 335
 336		if (!is_cache_op_valid(cache_type, cache_op))
 337			return "invalid-cache";
 
 
 
 338
 339		return event_cache_name(cache_type, cache_op, cache_result);
 340	}
 341
 342	case PERF_TYPE_SOFTWARE:
 343		if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
 344			return sw_event_names[config];
 345		return "unknown-software";
 346
 347	case PERF_TYPE_TRACEPOINT:
 348		return tracepoint_id_to_name(config);
 349
 350	default:
 351		break;
 352	}
 353
 354	return "unknown";
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 355}
 356
 357static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
 358{
 359	int i, j;
 360	int n, longest = -1;
 361
 362	for (i = 0; i < size; i++) {
 363		for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 364			n = strlen(names[i][j]);
 365			if (n > longest && !strncasecmp(*str, names[i][j], n))
 366				longest = n;
 367		}
 368		if (longest > 0) {
 369			*str += longest;
 370			return i;
 371		}
 372	}
 373
 374	return -1;
 375}
 376
 377static enum event_result
 378parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 
 
 
 
 
 
 
 
 
 
 
 
 
 379{
 380	const char *s = *str;
 
 
 381	int cache_type = -1, cache_op = -1, cache_result = -1;
 
 
 382
 383	cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 384	/*
 385	 * No fallback - if we cannot get a clear cache type
 386	 * then bail out:
 387	 */
 
 388	if (cache_type == -1)
 389		return EVT_FAILED;
 
 
 
 390
 391	while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 392		++s;
 
 
 393
 394		if (cache_op == -1) {
 395			cache_op = parse_aliases(&s, hw_cache_op,
 396						PERF_COUNT_HW_CACHE_OP_MAX);
 397			if (cache_op >= 0) {
 398				if (!is_cache_op_valid(cache_type, cache_op))
 399					return EVT_FAILED;
 400				continue;
 401			}
 402		}
 403
 404		if (cache_result == -1) {
 405			cache_result = parse_aliases(&s, hw_cache_result,
 406						PERF_COUNT_HW_CACHE_RESULT_MAX);
 407			if (cache_result >= 0)
 408				continue;
 409		}
 410
 411		/*
 412		 * Can't parse this as a cache op or result, so back up
 413		 * to the '-'.
 414		 */
 415		--s;
 416		break;
 417	}
 418
 419	/*
 420	 * Fall back to reads:
 421	 */
 422	if (cache_op == -1)
 423		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 424
 425	/*
 426	 * Fall back to accesses:
 427	 */
 428	if (cache_result == -1)
 429		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 430
 431	attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 432	attr->type = PERF_TYPE_HW_CACHE;
 
 433
 434	*str = s;
 435	return EVT_HANDLED;
 
 
 
 
 
 
 
 436}
 437
 438static enum event_result
 439parse_single_tracepoint_event(char *sys_name,
 440			      const char *evt_name,
 441			      unsigned int evt_length,
 442			      struct perf_event_attr *attr,
 443			      const char **strp)
 444{
 445	char evt_path[MAXPATHLEN];
 446	char id_buf[4];
 447	u64 id;
 448	int fd;
 449
 450	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 451		 sys_name, evt_name);
 452
 453	fd = open(evt_path, O_RDONLY);
 454	if (fd < 0)
 455		return EVT_FAILED;
 
 
 456
 457	if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 458		close(fd);
 459		return EVT_FAILED;
 
 
 
 
 
 
 
 460	}
 461
 462	close(fd);
 463	id = atoll(id_buf);
 464	attr->config = id;
 465	attr->type = PERF_TYPE_TRACEPOINT;
 466	*strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
 
 
 
 
 
 467
 468	attr->sample_type |= PERF_SAMPLE_RAW;
 469	attr->sample_type |= PERF_SAMPLE_TIME;
 470	attr->sample_type |= PERF_SAMPLE_CPU;
 
 471
 472	attr->sample_period = 1;
 
 473
 
 
 
 
 474
 475	return EVT_HANDLED;
 
 476}
 477
 478/* sys + ':' + event + ':' + flags*/
 479#define MAX_EVOPT_LEN	(MAX_EVENT_LENGTH * 2 + 2 + 128)
 480static enum event_result
 481parse_multiple_tracepoint_event(struct perf_evlist *evlist, char *sys_name,
 482				const char *evt_exp, char *flags)
 483{
 484	char evt_path[MAXPATHLEN];
 485	struct dirent *evt_ent;
 486	DIR *evt_dir;
 
 487
 488	snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
 
 
 
 
 489	evt_dir = opendir(evt_path);
 490
 491	if (!evt_dir) {
 492		perror("Can't open event dir");
 493		return EVT_FAILED;
 
 494	}
 495
 496	while ((evt_ent = readdir(evt_dir))) {
 497		char event_opt[MAX_EVOPT_LEN + 1];
 498		int len;
 499
 500		if (!strcmp(evt_ent->d_name, ".")
 501		    || !strcmp(evt_ent->d_name, "..")
 502		    || !strcmp(evt_ent->d_name, "enable")
 503		    || !strcmp(evt_ent->d_name, "filter"))
 504			continue;
 505
 506		if (!strglobmatch(evt_ent->d_name, evt_exp))
 507			continue;
 508
 509		len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
 510			       evt_ent->d_name, flags ? ":" : "",
 511			       flags ?: "");
 512		if (len < 0)
 513			return EVT_FAILED;
 514
 515		if (parse_events(evlist, event_opt, 0))
 516			return EVT_FAILED;
 
 517	}
 518
 519	return EVT_HANDLED_ALL;
 
 
 520}
 521
 522static enum event_result
 523parse_tracepoint_event(struct perf_evlist *evlist, const char **strp,
 524		       struct perf_event_attr *attr)
 525{
 526	const char *evt_name;
 527	char *flags = NULL, *comma_loc;
 528	char sys_name[MAX_EVENT_LENGTH];
 529	unsigned int sys_length, evt_length;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 530
 531	if (debugfs_valid_mountpoint(debugfs_path))
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 532		return 0;
 533
 534	evt_name = strchr(*strp, ':');
 535	if (!evt_name)
 536		return EVT_FAILED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 537
 538	sys_length = evt_name - *strp;
 539	if (sys_length >= MAX_EVENT_LENGTH)
 540		return 0;
 541
 542	strncpy(sys_name, *strp, sys_length);
 543	sys_name[sys_length] = '\0';
 544	evt_name = evt_name + 1;
 545
 546	comma_loc = strchr(evt_name, ',');
 547	if (comma_loc) {
 548		/* take the event name up to the comma */
 549		evt_name = strndup(evt_name, comma_loc - evt_name);
 550	}
 551	flags = strchr(evt_name, ':');
 552	if (flags) {
 553		/* split it out: */
 554		evt_name = strndup(evt_name, flags - evt_name);
 555		flags++;
 556	}
 557
 558	evt_length = strlen(evt_name);
 559	if (evt_length >= MAX_EVENT_LENGTH)
 560		return EVT_FAILED;
 561	if (strpbrk(evt_name, "*?")) {
 562		*strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
 563		return parse_multiple_tracepoint_event(evlist, sys_name,
 564						       evt_name, flags);
 565	} else {
 566		return parse_single_tracepoint_event(sys_name, evt_name,
 567						     evt_length, attr, strp);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 568	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 569}
 570
 571static enum event_result
 572parse_breakpoint_type(const char *type, const char **strp,
 573		      struct perf_event_attr *attr)
 574{
 575	int i;
 576
 577	for (i = 0; i < 3; i++) {
 578		if (!type[i])
 579			break;
 580
 
 
 
 
 
 
 
 
 581		switch (type[i]) {
 582		case 'r':
 583			attr->bp_type |= HW_BREAKPOINT_R;
 584			break;
 585		case 'w':
 586			attr->bp_type |= HW_BREAKPOINT_W;
 587			break;
 588		case 'x':
 589			attr->bp_type |= HW_BREAKPOINT_X;
 590			break;
 591		default:
 592			return EVT_FAILED;
 593		}
 594	}
 
 
 
 595	if (!attr->bp_type) /* Default */
 596		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 597
 598	*strp = type + i;
 
 599
 600	return EVT_HANDLED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 601}
 602
 603static enum event_result
 604parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
 
 605{
 606	const char *target;
 607	const char *type;
 608	char *endaddr;
 609	u64 addr;
 610	enum event_result err;
 611
 612	target = strchr(*strp, ':');
 613	if (!target)
 614		return EVT_FAILED;
 
 
 
 
 
 
 615
 616	if (strncmp(*strp, "mem", target - *strp) != 0)
 617		return EVT_FAILED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 618
 619	target++;
 620
 621	addr = strtoull(target, &endaddr, 0);
 622	if (target == endaddr)
 623		return EVT_FAILED;
 
 624
 625	attr->bp_addr = addr;
 626	*strp = endaddr;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 627
 628	type = strchr(target, ':');
 
 
 
 
 
 
 629
 630	/* If no type is defined, just rw as default */
 631	if (!type) {
 632		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
 633	} else {
 634		err = parse_breakpoint_type(++type, strp, attr);
 635		if (err == EVT_FAILED)
 636			return EVT_FAILED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 637	}
 638
 639	/*
 640	 * We should find a nice way to override the access length
 641	 * Provide some defaults for now
 
 
 
 
 
 642	 */
 643	if (attr->bp_type == HW_BREAKPOINT_X)
 644		attr->bp_len = sizeof(long);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 645	else
 646		attr->bp_len = HW_BREAKPOINT_LEN_4;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 647
 648	attr->type = PERF_TYPE_BREAKPOINT;
 
 
 
 
 
 
 
 
 
 649
 650	return EVT_HANDLED;
 651}
 652
 653static int check_events(const char *str, unsigned int i)
 
 654{
 655	int n;
 656
 657	n = strlen(event_symbols[i].symbol);
 658	if (!strncasecmp(str, event_symbols[i].symbol, n))
 659		return n;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 660
 661	n = strlen(event_symbols[i].alias);
 662	if (n) {
 663		if (!strncasecmp(str, event_symbols[i].alias, n))
 664			return n;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 665	}
 666
 
 
 
 
 667	return 0;
 668}
 669
 670static enum event_result
 671parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 672{
 673	const char *str = *strp;
 674	unsigned int i;
 675	int n;
 676
 677	for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 678		n = check_events(str, i);
 679		if (n > 0) {
 680			attr->type = event_symbols[i].type;
 681			attr->config = event_symbols[i].config;
 682			*strp = str + n;
 683			return EVT_HANDLED;
 684		}
 
 
 
 685	}
 686	return EVT_FAILED;
 
 
 687}
 688
 689static enum event_result
 690parse_raw_event(const char **strp, struct perf_event_attr *attr)
 
 691{
 692	const char *str = *strp;
 693	u64 config;
 694	int n;
 695
 696	if (*str != 'r')
 697		return EVT_FAILED;
 698	n = hex2u64(str + 1, &config);
 699	if (n > 0) {
 700		const char *end = str + n + 1;
 701		if (*end != '\0' && *end != ',' && *end != ':')
 702			return EVT_FAILED;
 703
 704		*strp = end;
 705		attr->type = PERF_TYPE_RAW;
 706		attr->config = config;
 707		return EVT_HANDLED;
 708	}
 709	return EVT_FAILED;
 
 710}
 711
 712static enum event_result
 713parse_numeric_event(const char **strp, struct perf_event_attr *attr)
 
 
 
 714{
 715	const char *str = *strp;
 716	char *endp;
 717	unsigned long type;
 718	u64 config;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 719
 720	type = strtoul(str, &endp, 0);
 721	if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 722		str = endp + 1;
 723		config = strtoul(str, &endp, 0);
 724		if (endp > str) {
 725			attr->type = type;
 726			attr->config = config;
 727			*strp = endp;
 728			return EVT_HANDLED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 729		}
 
 730	}
 731	return EVT_FAILED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 732}
 733
 734static int
 735parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 
 736{
 737	const char *str = *strp;
 738	int exclude = 0;
 739	int eu = 0, ek = 0, eh = 0, precise = 0;
 
 
 
 
 
 740
 741	if (!*str)
 
 742		return 0;
 743
 744	if (*str == ',')
 745		return 0;
 
 
 
 
 746
 747	if (*str++ != ':')
 748		return -1;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 749
 750	while (*str) {
 751		if (*str == 'u') {
 752			if (!exclude)
 753				exclude = eu = ek = eh = 1;
 
 
 754			eu = 0;
 755		} else if (*str == 'k') {
 756			if (!exclude)
 757				exclude = eu = ek = eh = 1;
 758			ek = 0;
 759		} else if (*str == 'h') {
 760			if (!exclude)
 761				exclude = eu = ek = eh = 1;
 762			eh = 0;
 
 
 
 
 
 
 
 
 
 
 763		} else if (*str == 'p') {
 764			precise++;
 
 
 
 
 
 
 
 
 
 
 
 765		} else
 766			break;
 767
 768		++str;
 769	}
 770	if (str < *strp + 2)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 771		return -1;
 772
 773	*strp = str;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 774
 775	attr->exclude_user   = eu;
 776	attr->exclude_kernel = ek;
 777	attr->exclude_hv     = eh;
 778	attr->precise_ip     = precise;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 779
 780	return 0;
 781}
 782
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 783/*
 784 * Each event can have multiple symbolic names.
 785 * Symbolic names are (almost) exactly matched.
 786 */
 787static enum event_result
 788parse_event_symbols(struct perf_evlist *evlist, const char **str,
 789		    struct perf_event_attr *attr)
 790{
 791	enum event_result ret;
 792
 793	ret = parse_tracepoint_event(evlist, str, attr);
 794	if (ret != EVT_FAILED)
 795		goto modifier;
 796
 797	ret = parse_raw_event(str, attr);
 798	if (ret != EVT_FAILED)
 799		goto modifier;
 800
 801	ret = parse_numeric_event(str, attr);
 802	if (ret != EVT_FAILED)
 803		goto modifier;
 804
 805	ret = parse_symbolic_event(str, attr);
 806	if (ret != EVT_FAILED)
 807		goto modifier;
 808
 809	ret = parse_generic_hw_event(str, attr);
 810	if (ret != EVT_FAILED)
 811		goto modifier;
 812
 813	ret = parse_breakpoint_event(str, attr);
 814	if (ret != EVT_FAILED)
 815		goto modifier;
 816
 817	fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
 818	fprintf(stderr, "Run 'perf list' for a list of valid events\n");
 819	return EVT_FAILED;
 820
 821modifier:
 822	if (parse_event_modifier(str, attr) < 0) {
 823		fprintf(stderr, "invalid event modifier: '%s'\n", *str);
 824		fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 825
 826		return EVT_FAILED;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 827	}
 828
 
 829	return ret;
 830}
 831
 832int parse_events(struct perf_evlist *evlist , const char *str, int unset __used)
 
 833{
 834	struct perf_event_attr attr;
 835	enum event_result ret;
 836	const char *ostr;
 
 
 
 
 
 
 837
 838	for (;;) {
 839		ostr = str;
 840		memset(&attr, 0, sizeof(attr));
 841		ret = parse_event_symbols(evlist, &str, &attr);
 842		if (ret == EVT_FAILED)
 843			return -1;
 
 
 
 
 
 
 844
 845		if (!(*str == 0 || *str == ',' || isspace(*str)))
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 846			return -1;
 
 
 847
 848		if (ret != EVT_HANDLED_ALL) {
 849			struct perf_evsel *evsel;
 850			evsel = perf_evsel__new(&attr, evlist->nr_entries);
 851			if (evsel == NULL)
 852				return -1;
 853			perf_evlist__add(evlist, evsel);
 854
 855			evsel->name = calloc(str - ostr + 1, 1);
 856			if (!evsel->name)
 857				return -1;
 858			strncpy(evsel->name, ostr, str - ostr);
 859		}
 860
 861		if (*str == 0)
 862			break;
 863		if (*str == ',')
 864			++str;
 865		while (isspace(*str))
 866			++str;
 867	}
 868
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 869	return 0;
 870}
 871
 872int parse_events_option(const struct option *opt, const char *str,
 873			int unset __used)
 874{
 875	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 876	return parse_events(evlist, str, unset);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 877}
 878
 879int parse_filter(const struct option *opt, const char *str,
 880		 int unset __used)
 881{
 882	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
 883	struct perf_evsel *last = NULL;
 
 
 
 884
 885	if (evlist->nr_entries > 0)
 886		last = list_entry(evlist->entries.prev, struct perf_evsel, node);
 
 
 887
 888	if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
 889		fprintf(stderr,
 890			"-F option should follow a -e tracepoint option\n");
 891		return -1;
 892	}
 893
 894	last->filter = strdup(str);
 895	if (last->filter == NULL) {
 896		fprintf(stderr, "not enough memory to hold filter string\n");
 
 
 897		return -1;
 898	}
 899
 900	return 0;
 901}
 902
 
 
 
 
 
 
 
 
 
 
 903static const char * const event_type_descriptors[] = {
 904	"Hardware event",
 905	"Software event",
 906	"Tracepoint event",
 907	"Hardware cache event",
 908	"Raw hardware event descriptor",
 909	"Hardware breakpoint",
 910};
 911
 
 
 
 
 
 
 
 
 912/*
 913 * Print the events from <debugfs_mount_point>/tracing/events
 914 */
 915
 916void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
 
 917{
 918	DIR *sys_dir, *evt_dir;
 919	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 920	char evt_path[MAXPATHLEN];
 921	char dir_path[MAXPATHLEN];
 
 
 
 922
 923	if (debugfs_valid_mountpoint(debugfs_path))
 924		return;
 925
 926	sys_dir = opendir(debugfs_path);
 927	if (!sys_dir)
 928		return;
 929
 930	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 931		if (subsys_glob != NULL && 
 932		    !strglobmatch(sys_dirent.d_name, subsys_glob))
 
 
 
 
 
 
 933			continue;
 934
 935		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 936			 sys_dirent.d_name);
 
 937		evt_dir = opendir(dir_path);
 938		if (!evt_dir)
 939			continue;
 
 
 
 
 
 940
 941		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 942			if (event_glob != NULL && 
 943			    !strglobmatch(evt_dirent.d_name, event_glob))
 944				continue;
 
 945
 946			snprintf(evt_path, MAXPATHLEN, "%s:%s",
 947				 sys_dirent.d_name, evt_dirent.d_name);
 948			printf("  %-50s [%s]\n", evt_path,
 949				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
 
 
 
 
 
 950		}
 951		closedir(evt_dir);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 952	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 953	closedir(sys_dir);
 
 
 
 
 
 954}
 955
 956/*
 957 * Check whether event is in <debugfs_mount_point>/tracing/events
 958 */
 959
 960int is_valid_tracepoint(const char *event_string)
 961{
 962	DIR *sys_dir, *evt_dir;
 963	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 964	char evt_path[MAXPATHLEN];
 965	char dir_path[MAXPATHLEN];
 966
 967	if (debugfs_valid_mountpoint(debugfs_path))
 968		return 0;
 969
 970	sys_dir = opendir(debugfs_path);
 971	if (!sys_dir)
 972		return 0;
 973
 974	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
 975
 976		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
 977			 sys_dirent.d_name);
 978		evt_dir = opendir(dir_path);
 979		if (!evt_dir)
 980			continue;
 981
 982		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
 983			snprintf(evt_path, MAXPATHLEN, "%s:%s",
 984				 sys_dirent.d_name, evt_dirent.d_name);
 985			if (!strcmp(evt_path, event_string)) {
 986				closedir(evt_dir);
 987				closedir(sys_dir);
 988				return 1;
 989			}
 990		}
 991		closedir(evt_dir);
 
 
 992	}
 993	closedir(sys_dir);
 994	return 0;
 995}
 996
 997void print_events_type(u8 type)
 998{
 999	struct event_symbol *syms = event_symbols;
1000	unsigned int i;
1001	char name[64];
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1002
1003	for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1004		if (type != syms->type)
1005			continue;
1006
1007		if (strlen(syms->alias))
1008			snprintf(name, sizeof(name),  "%s OR %s",
1009				 syms->symbol, syms->alias);
1010		else
1011			snprintf(name, sizeof(name), "%s", syms->symbol);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1012
1013		printf("  %-50s [%s]\n", name,
1014			event_type_descriptors[type]);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1015	}
 
1016}
1017
1018int print_hwcache_events(const char *event_glob)
1019{
1020	unsigned int type, op, i, printed = 0;
 
 
 
 
 
 
 
 
 
 
1021
1022	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1023		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1024			/* skip invalid cache type */
1025			if (!is_cache_op_valid(type, op))
1026				continue;
1027
1028			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1029				char *name = event_cache_name(type, op, i);
1030
1031				if (event_glob != NULL && !strglobmatch(name, event_glob))
1032					continue;
1033
1034				printf("  %-50s [%s]\n", name,
1035					event_type_descriptors[PERF_TYPE_HW_CACHE]);
1036				++printed;
 
 
 
 
 
 
 
 
 
 
1037			}
1038		}
1039	}
1040
1041	return printed;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1042}
1043
1044#define MAX_NAME_LEN 100
 
 
 
 
 
 
 
 
1045
1046/*
1047 * Print the help text for the event symbols:
1048 */
1049void print_events(const char *event_glob)
1050{
1051	unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1052	struct event_symbol *syms = event_symbols;
 
 
 
 
 
 
 
 
1053	char name[MAX_NAME_LEN];
 
 
1054
1055	printf("\n");
1056	printf("List of pre-defined events (to be used in -e):\n");
 
 
 
 
 
1057
1058	for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1059		type = syms->type;
1060
1061		if (type != prev_type && printed) {
1062			printf("\n");
1063			printed = 0;
1064			ntypes_printed++;
1065		}
1066
1067		if (event_glob != NULL && 
1068		    !(strglobmatch(syms->symbol, event_glob) ||
1069		      (syms->alias && strglobmatch(syms->alias, event_glob))))
1070			continue;
1071
1072		if (strlen(syms->alias))
 
 
 
 
 
 
 
 
1073			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1074		else
1075			strncpy(name, syms->symbol, MAX_NAME_LEN);
1076		printf("  %-50s [%s]\n", name,
1077			event_type_descriptors[type]);
1078
1079		prev_type = type;
1080		++printed;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1081	}
1082
1083	if (ntypes_printed) {
1084		printed = 0;
1085		printf("\n");
1086	}
1087	print_hwcache_events(event_glob);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1088
1089	if (event_glob != NULL)
1090		return;
1091
1092	printf("\n");
1093	printf("  %-50s [%s]\n",
1094		"rNNN (see 'perf list --help' on how to encode it)",
1095	       event_type_descriptors[PERF_TYPE_RAW]);
1096	printf("\n");
 
 
 
 
1097
1098	printf("  %-50s [%s]\n",
1099			"mem:<addr>[:access]",
1100			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1101	printf("\n");
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1102
1103	print_tracepoint_events(NULL, NULL);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1104}