parse-events.c 41.5 KB
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#include <linux/hw_breakpoint.h>
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#include <linux/err.h>
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#include "util.h"
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#include "../perf.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "parse-options.h"
#include "parse-events.h"
#include "exec_cmd.h"
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#include "string.h"
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#include "symbol.h"
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#include "cache.h"
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#include "header.h"
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#include "debug.h"
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#include <api/fs/tracing_path.h>
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#include "parse-events-bison.h"
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#define YY_EXTRA_TYPE int
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#include "parse-events-flex.h"
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#include "pmu.h"
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#include "thread_map.h"
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#include "cpumap.h"
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#include "asm/bug.h"
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#define MAX_NAME_LEN 100
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#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
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int parse_events_parse(void *data, void *scanner);
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static struct perf_pmu_event_symbol *perf_pmu_events_list;
/*
 * The variable indicates the number of supported pmu event symbols.
 * 0 means not initialized and ready to init
 * -1 means failed to init, don't try anymore
 * >0 is the number of supported pmu event symbols
 */
static int perf_pmu_events_list_num;

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struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
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	[PERF_COUNT_HW_CPU_CYCLES] = {
		.symbol = "cpu-cycles",
		.alias  = "cycles",
	},
	[PERF_COUNT_HW_INSTRUCTIONS] = {
		.symbol = "instructions",
		.alias  = "",
	},
	[PERF_COUNT_HW_CACHE_REFERENCES] = {
		.symbol = "cache-references",
		.alias  = "",
	},
	[PERF_COUNT_HW_CACHE_MISSES] = {
		.symbol = "cache-misses",
		.alias  = "",
	},
	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
		.symbol = "branch-instructions",
		.alias  = "branches",
	},
	[PERF_COUNT_HW_BRANCH_MISSES] = {
		.symbol = "branch-misses",
		.alias  = "",
	},
	[PERF_COUNT_HW_BUS_CYCLES] = {
		.symbol = "bus-cycles",
		.alias  = "",
	},
	[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
		.symbol = "stalled-cycles-frontend",
		.alias  = "idle-cycles-frontend",
	},
	[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
		.symbol = "stalled-cycles-backend",
		.alias  = "idle-cycles-backend",
	},
	[PERF_COUNT_HW_REF_CPU_CYCLES] = {
		.symbol = "ref-cycles",
		.alias  = "",
	},
};

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struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
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	[PERF_COUNT_SW_CPU_CLOCK] = {
		.symbol = "cpu-clock",
		.alias  = "",
	},
	[PERF_COUNT_SW_TASK_CLOCK] = {
		.symbol = "task-clock",
		.alias  = "",
	},
	[PERF_COUNT_SW_PAGE_FAULTS] = {
		.symbol = "page-faults",
		.alias  = "faults",
	},
	[PERF_COUNT_SW_CONTEXT_SWITCHES] = {
		.symbol = "context-switches",
		.alias  = "cs",
	},
	[PERF_COUNT_SW_CPU_MIGRATIONS] = {
		.symbol = "cpu-migrations",
		.alias  = "migrations",
	},
	[PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
		.symbol = "minor-faults",
		.alias  = "",
	},
	[PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
		.symbol = "major-faults",
		.alias  = "",
	},
	[PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
		.symbol = "alignment-faults",
		.alias  = "",
	},
	[PERF_COUNT_SW_EMULATION_FAULTS] = {
		.symbol = "emulation-faults",
		.alias  = "",
	},
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	[PERF_COUNT_SW_DUMMY] = {
		.symbol = "dummy",
		.alias  = "",
	},
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};

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#define __PERF_EVENT_FIELD(config, name) \
	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
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#define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
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#define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
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#define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
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#define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)
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#define for_each_subsystem(sys_dir, sys_dirent, sys_next)	       \
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	while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)	       \
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	if (sys_dirent.d_type == DT_DIR &&				       \
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	   (strcmp(sys_dirent.d_name, ".")) &&				       \
	   (strcmp(sys_dirent.d_name, "..")))

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static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
{
	char evt_path[MAXPATHLEN];
	int fd;

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	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
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			sys_dir->d_name, evt_dir->d_name);
	fd = open(evt_path, O_RDONLY);
	if (fd < 0)
		return -EINVAL;
	close(fd);

	return 0;
}

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#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)	       \
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	while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
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	if (evt_dirent.d_type == DT_DIR &&				       \
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	   (strcmp(evt_dirent.d_name, ".")) &&				       \
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	   (strcmp(evt_dirent.d_name, "..")) &&				       \
	   (!tp_event_has_id(&sys_dirent, &evt_dirent)))
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#define MAX_EVENT_LENGTH 512
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struct tracepoint_path *tracepoint_id_to_path(u64 config)
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{
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	struct tracepoint_path *path = NULL;
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	DIR *sys_dir, *evt_dir;
	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
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	char id_buf[24];
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	int fd;
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	u64 id;
	char evt_path[MAXPATHLEN];
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	char dir_path[MAXPATHLEN];
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	sys_dir = opendir(tracing_events_path);
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	if (!sys_dir)
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		return NULL;
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	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
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		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
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			 sys_dirent.d_name);
		evt_dir = opendir(dir_path);
		if (!evt_dir)
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			continue;
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		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
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			snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
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				 evt_dirent.d_name);
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			fd = open(evt_path, O_RDONLY);
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			if (fd < 0)
				continue;
			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
				close(fd);
				continue;
			}
			close(fd);
			id = atoll(id_buf);
			if (id == config) {
				closedir(evt_dir);
				closedir(sys_dir);
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				path = zalloc(sizeof(*path));
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				path->system = malloc(MAX_EVENT_LENGTH);
				if (!path->system) {
					free(path);
					return NULL;
				}
				path->name = malloc(MAX_EVENT_LENGTH);
				if (!path->name) {
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					zfree(&path->system);
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					free(path);
					return NULL;
				}
				strncpy(path->system, sys_dirent.d_name,
					MAX_EVENT_LENGTH);
				strncpy(path->name, evt_dirent.d_name,
					MAX_EVENT_LENGTH);
				return path;
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			}
		}
		closedir(evt_dir);
	}

	closedir(sys_dir);
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	return NULL;
}

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struct tracepoint_path *tracepoint_name_to_path(const char *name)
{
	struct tracepoint_path *path = zalloc(sizeof(*path));
	char *str = strchr(name, ':');

	if (path == NULL || str == NULL) {
		free(path);
		return NULL;
	}

	path->system = strndup(name, str - name);
	path->name = strdup(str+1);

	if (path->system == NULL || path->name == NULL) {
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		zfree(&path->system);
		zfree(&path->name);
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		free(path);
		path = NULL;
	}

	return path;
}

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const char *event_type(int type)
{
	switch (type) {
	case PERF_TYPE_HARDWARE:
		return "hardware";

	case PERF_TYPE_SOFTWARE:
		return "software";

	case PERF_TYPE_TRACEPOINT:
		return "tracepoint";

	case PERF_TYPE_HW_CACHE:
		return "hardware-cache";

	default:
		break;
	}

	return "unknown";
}

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static struct perf_evsel *
__add_event(struct list_head *list, int *idx,
	    struct perf_event_attr *attr,
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	    char *name, struct cpu_map *cpus,
	    struct list_head *config_terms)
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{
	struct perf_evsel *evsel;

	event_attr_init(attr);

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	evsel = perf_evsel__new_idx(attr, (*idx)++);
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	if (!evsel)
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		return NULL;
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	evsel->cpus     = cpu_map__get(cpus);
	evsel->own_cpus = cpu_map__get(cpus);
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	if (name)
		evsel->name = strdup(name);
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	if (config_terms)
		list_splice(config_terms, &evsel->config_terms);

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	list_add_tail(&evsel->node, list);
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	return evsel;
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}

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static int add_event(struct list_head *list, int *idx,
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		     struct perf_event_attr *attr, char *name,
		     struct list_head *config_terms)
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{
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	return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
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}

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static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
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{
	int i, j;
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	int n, longest = -1;
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	for (i = 0; i < size; i++) {
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		for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
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			n = strlen(names[i][j]);
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			if (n > longest && !strncasecmp(str, names[i][j], n))
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				longest = n;
		}
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		if (longest > 0)
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			return i;
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	}

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	return -1;
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}

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int parse_events_add_cache(struct list_head *list, int *idx,
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			   char *type, char *op_result1, char *op_result2)
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{
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	struct perf_event_attr attr;
	char name[MAX_NAME_LEN];
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	int cache_type = -1, cache_op = -1, cache_result = -1;
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	char *op_result[2] = { op_result1, op_result2 };
	int i, n;
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	/*
	 * No fallback - if we cannot get a clear cache type
	 * then bail out:
	 */
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	cache_type = parse_aliases(type, perf_evsel__hw_cache,
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				   PERF_COUNT_HW_CACHE_MAX);
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	if (cache_type == -1)
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		return -EINVAL;

	n = snprintf(name, MAX_NAME_LEN, "%s", type);
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	for (i = 0; (i < 2) && (op_result[i]); i++) {
		char *str = op_result[i];

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		n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
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		if (cache_op == -1) {
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			cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
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						 PERF_COUNT_HW_CACHE_OP_MAX);
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			if (cache_op >= 0) {
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				if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
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					return -EINVAL;
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				continue;
			}
		}

		if (cache_result == -1) {
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			cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
						     PERF_COUNT_HW_CACHE_RESULT_MAX);
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			if (cache_result >= 0)
				continue;
		}
	}
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	/*
	 * Fall back to reads:
	 */
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	if (cache_op == -1)
		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
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	/*
	 * Fall back to accesses:
	 */
	if (cache_result == -1)
		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;

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	memset(&attr, 0, sizeof(attr));
	attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
	attr.type = PERF_TYPE_HW_CACHE;
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	return add_event(list, idx, &attr, name, NULL);
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}

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static void tracepoint_error(struct parse_events_error *error, int err,
			     char *sys, char *name)
{
	char help[BUFSIZ];

	/*
	 * We get error directly from syscall errno ( > 0),
	 * or from encoded pointer's error ( < 0).
	 */
	err = abs(err);

	switch (err) {
	case EACCES:
		error->str = strdup("can't access trace events");
		break;
	case ENOENT:
		error->str = strdup("unknown tracepoint");
		break;
	default:
		error->str = strdup("failed to add tracepoint");
		break;
	}

	tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
	error->help = strdup(help);
}

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static int add_tracepoint(struct list_head *list, int *idx,
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			  char *sys_name, char *evt_name,
			  struct parse_events_error *error __maybe_unused)
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{
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	struct perf_evsel *evsel;
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	evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
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	if (IS_ERR(evsel)) {
		tracepoint_error(error, PTR_ERR(evsel), sys_name, evt_name);
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		return PTR_ERR(evsel);
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	}
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	list_add_tail(&evsel->node, list);
	return 0;
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}

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static int add_tracepoint_multi_event(struct list_head *list, int *idx,
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				      char *sys_name, char *evt_name,
				      struct parse_events_error *error)
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{
	char evt_path[MAXPATHLEN];
	struct dirent *evt_ent;
	DIR *evt_dir;
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	int ret = 0;
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	snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
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	evt_dir = opendir(evt_path);
	if (!evt_dir) {
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		tracepoint_error(error, errno, sys_name, evt_name);
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		return -1;
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	}

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	while (!ret && (evt_ent = readdir(evt_dir))) {
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		if (!strcmp(evt_ent->d_name, ".")
		    || !strcmp(evt_ent->d_name, "..")
		    || !strcmp(evt_ent->d_name, "enable")
		    || !strcmp(evt_ent->d_name, "filter"))
			continue;

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		if (!strglobmatch(evt_ent->d_name, evt_name))
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			continue;

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		ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name, error);
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	}

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	closedir(evt_dir);
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	return ret;
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}

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static int add_tracepoint_event(struct list_head *list, int *idx,
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				char *sys_name, char *evt_name,
				struct parse_events_error *error)
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{
	return strpbrk(evt_name, "*?") ?
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	       add_tracepoint_multi_event(list, idx, sys_name, evt_name, error) :
	       add_tracepoint(list, idx, sys_name, evt_name, error);
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}

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static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
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				    char *sys_name, char *evt_name,
				    struct parse_events_error *error)
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{
	struct dirent *events_ent;
	DIR *events_dir;
	int ret = 0;

	events_dir = opendir(tracing_events_path);
	if (!events_dir) {
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		tracepoint_error(error, errno, sys_name, evt_name);
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		return -1;
	}

	while (!ret && (events_ent = readdir(events_dir))) {
		if (!strcmp(events_ent->d_name, ".")
		    || !strcmp(events_ent->d_name, "..")
		    || !strcmp(events_ent->d_name, "enable")
		    || !strcmp(events_ent->d_name, "header_event")
		    || !strcmp(events_ent->d_name, "header_page"))
			continue;

		if (!strglobmatch(events_ent->d_name, sys_name))
			continue;

		ret = add_tracepoint_event(list, idx, events_ent->d_name,
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					   evt_name, error);
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	}

	closedir(events_dir);
	return ret;
}

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int parse_events_add_tracepoint(struct list_head *list, int *idx,
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				char *sys, char *event,
				struct parse_events_error *error)
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{
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	if (strpbrk(sys, "*?"))
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		return add_tracepoint_multi_sys(list, idx, sys, event, error);
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	else
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		return add_tracepoint_event(list, idx, sys, event, error);
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}

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static int
parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
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{
	int i;

	for (i = 0; i < 3; i++) {
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		if (!type || !type[i])
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			break;

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#define CHECK_SET_TYPE(bit)		\
do {					\
	if (attr->bp_type & bit)	\
		return -EINVAL;		\
	else				\
		attr->bp_type |= bit;	\
} while (0)

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		switch (type[i]) {
		case 'r':
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			CHECK_SET_TYPE(HW_BREAKPOINT_R);
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			break;
		case 'w':
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			CHECK_SET_TYPE(HW_BREAKPOINT_W);
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			break;
		case 'x':
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			CHECK_SET_TYPE(HW_BREAKPOINT_X);
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			break;
		default:
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			return -EINVAL;
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		}
	}
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#undef CHECK_SET_TYPE

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	if (!attr->bp_type) /* Default */
		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;

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	return 0;
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}

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int parse_events_add_breakpoint(struct list_head *list, int *idx,
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				void *ptr, char *type, u64 len)
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{
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	struct perf_event_attr attr;
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	memset(&attr, 0, sizeof(attr));
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	attr.bp_addr = (unsigned long) ptr;
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	if (parse_breakpoint_type(type, &attr))
		return -EINVAL;
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	/* Provide some defaults if len is not specified */
	if (!len) {
		if (attr.bp_type == HW_BREAKPOINT_X)
			len = sizeof(long);
		else
			len = HW_BREAKPOINT_LEN_4;
	}

	attr.bp_len = len;
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	attr.type = PERF_TYPE_BREAKPOINT;
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	attr.sample_period = 1;
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	return add_event(list, idx, &attr, NULL, NULL);
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}

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static int check_type_val(struct parse_events_term *term,
			  struct parse_events_error *err,
			  int type)
{
	if (type == term->type_val)
		return 0;

	if (err) {
		err->idx = term->err_val;
		if (type == PARSE_EVENTS__TERM_TYPE_NUM)
			err->str = strdup("expected numeric value");
		else
			err->str = strdup("expected string value");
	}
	return -EINVAL;
}

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static int config_term(struct perf_event_attr *attr,
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		       struct parse_events_term *term,
		       struct parse_events_error *err)
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{
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#define CHECK_TYPE_VAL(type)						   \
do {									   \
	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
		return -EINVAL;						   \
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} while (0)

	switch (term->type_term) {
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	case PARSE_EVENTS__TERM_TYPE_USER:
		/*
		 * Always succeed for sysfs terms, as we dont know
		 * at this point what type they need to have.
		 */
		return 0;
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	case PARSE_EVENTS__TERM_TYPE_CONFIG:
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		CHECK_TYPE_VAL(NUM);
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		attr->config = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
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		CHECK_TYPE_VAL(NUM);
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		attr->config1 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
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		CHECK_TYPE_VAL(NUM);
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		attr->config2 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
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		CHECK_TYPE_VAL(NUM);
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		break;
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	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
		CHECK_TYPE_VAL(NUM);
		break;
637 638 639 640 641 642
	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
		/*
		 * TODO uncomment when the field is available
		 * attr->branch_sample_type = term->val.num;
		 */
		break;
K
Kan Liang 已提交
643 644 645 646 647 648 649 650
	case PARSE_EVENTS__TERM_TYPE_TIME:
		CHECK_TYPE_VAL(NUM);
		if (term->val.num > 1) {
			err->str = strdup("expected 0 or 1");
			err->idx = term->err_val;
			return -EINVAL;
		}
		break;
651 652 653 654 655 656
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
		CHECK_TYPE_VAL(STR);
		break;
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
		CHECK_TYPE_VAL(NUM);
		break;
657 658 659
	case PARSE_EVENTS__TERM_TYPE_NAME:
		CHECK_TYPE_VAL(STR);
		break;
660 661 662
	default:
		return -EINVAL;
	}
663

664
	return 0;
665
#undef CHECK_TYPE_VAL
666 667 668
}

static int config_attr(struct perf_event_attr *attr,
669 670
		       struct list_head *head,
		       struct parse_events_error *err)
671
{
672
	struct parse_events_term *term;
673 674

	list_for_each_entry(term, head, list)
675
		if (config_term(attr, term, err))
676 677 678 679 680
			return -EINVAL;

	return 0;
}

681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
static int get_config_terms(struct list_head *head_config,
			    struct list_head *head_terms __maybe_unused)
{
#define ADD_CONFIG_TERM(__type, __name, __val)			\
do {								\
	struct perf_evsel_config_term *__t;			\
								\
	__t = zalloc(sizeof(*__t));				\
	if (!__t)						\
		return -ENOMEM;					\
								\
	INIT_LIST_HEAD(&__t->list);				\
	__t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;	\
	__t->val.__name = __val;				\
	list_add_tail(&__t->list, head_terms);			\
} while (0)

	struct parse_events_term *term;

	list_for_each_entry(term, head_config, list) {
		switch (term->type_term) {
702 703
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
K
Kan Liang 已提交
704
			break;
705 706 707
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
			break;
K
Kan Liang 已提交
708 709 710
		case PARSE_EVENTS__TERM_TYPE_TIME:
			ADD_CONFIG_TERM(TIME, time, term->val.num);
			break;
711 712 713 714 715 716
		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
			ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
			break;
		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
			ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
			break;
717 718 719 720 721 722 723 724
		default:
			break;
		}
	}
#undef ADD_EVSEL_CONFIG
	return 0;
}

725 726
int parse_events_add_numeric(struct parse_events_evlist *data,
			     struct list_head *list,
727
			     u32 type, u64 config,
728
			     struct list_head *head_config)
729
{
730
	struct perf_event_attr attr;
731
	LIST_HEAD(config_terms);
732

733 734 735
	memset(&attr, 0, sizeof(attr));
	attr.type = type;
	attr.config = config;
736

737 738 739 740 741 742 743
	if (head_config) {
		if (config_attr(&attr, head_config, data->error))
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
744

745
	return add_event(list, &data->idx, &attr, NULL, &config_terms);
746
}
747

748
static int parse_events__is_name_term(struct parse_events_term *term)
749 750 751 752
{
	return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
}

753
static char *pmu_event_name(struct list_head *head_terms)
754
{
755
	struct parse_events_term *term;
756 757 758 759 760

	list_for_each_entry(term, head_terms, list)
		if (parse_events__is_name_term(term))
			return term->val.str;

761
	return NULL;
762 763
}

764 765 766
int parse_events_add_pmu(struct parse_events_evlist *data,
			 struct list_head *list, char *name,
			 struct list_head *head_config)
767 768
{
	struct perf_event_attr attr;
769
	struct perf_pmu_info info;
770
	struct perf_pmu *pmu;
771
	struct perf_evsel *evsel;
772
	LIST_HEAD(config_terms);
773 774 775 776 777

	pmu = perf_pmu__find(name);
	if (!pmu)
		return -EINVAL;

778 779 780 781 782 783
	if (pmu->default_config) {
		memcpy(&attr, pmu->default_config,
		       sizeof(struct perf_event_attr));
	} else {
		memset(&attr, 0, sizeof(attr));
	}
784

785 786
	if (!head_config) {
		attr.type = pmu->type;
787
		evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
788 789 790
		return evsel ? 0 : -ENOMEM;
	}

791
	if (perf_pmu__check_alias(pmu, head_config, &info))
792 793
		return -EINVAL;

794 795 796 797
	/*
	 * Configure hardcoded terms first, no need to check
	 * return value when called with fail == 0 ;)
	 */
798
	if (config_attr(&attr, head_config, data->error))
799
		return -EINVAL;
800

801 802 803
	if (get_config_terms(head_config, &config_terms))
		return -ENOMEM;

804
	if (perf_pmu__config(pmu, &attr, head_config, data->error))
805 806
		return -EINVAL;

807
	evsel = __add_event(list, &data->idx, &attr,
808 809
			    pmu_event_name(head_config), pmu->cpus,
			    &config_terms);
810
	if (evsel) {
811 812
		evsel->unit = info.unit;
		evsel->scale = info.scale;
813
		evsel->per_pkg = info.per_pkg;
814
		evsel->snapshot = info.snapshot;
815 816 817
	}

	return evsel ? 0 : -ENOMEM;
818 819
}

820 821
int parse_events__modifier_group(struct list_head *list,
				 char *event_mod)
822
{
823 824 825
	return parse_events__modifier_event(list, event_mod, true);
}

826
void parse_events__set_leader(char *name, struct list_head *list)
827 828 829
{
	struct perf_evsel *leader;

830 831
	__perf_evlist__set_leader(list);
	leader = list_entry(list->next, struct perf_evsel, node);
832
	leader->group_name = name ? strdup(name) : NULL;
833 834
}

835
/* list_event is assumed to point to malloc'ed memory */
836 837 838 839 840
void parse_events_update_lists(struct list_head *list_event,
			       struct list_head *list_all)
{
	/*
	 * Called for single event definition. Update the
841
	 * 'all event' list, and reinit the 'single event'
842 843 844
	 * list, for next event definition.
	 */
	list_splice_tail(list_event, list_all);
845
	free(list_event);
846 847
}

848 849 850 851 852 853
struct event_modifier {
	int eu;
	int ek;
	int eh;
	int eH;
	int eG;
854
	int eI;
855 856
	int precise;
	int exclude_GH;
857
	int sample_read;
858
	int pinned;
859 860 861 862
};

static int get_event_modifier(struct event_modifier *mod, char *str,
			       struct perf_evsel *evsel)
863
{
864 865 866 867 868
	int eu = evsel ? evsel->attr.exclude_user : 0;
	int ek = evsel ? evsel->attr.exclude_kernel : 0;
	int eh = evsel ? evsel->attr.exclude_hv : 0;
	int eH = evsel ? evsel->attr.exclude_host : 0;
	int eG = evsel ? evsel->attr.exclude_guest : 0;
869
	int eI = evsel ? evsel->attr.exclude_idle : 0;
870
	int precise = evsel ? evsel->attr.precise_ip : 0;
871
	int sample_read = 0;
872
	int pinned = evsel ? evsel->attr.pinned : 0;
873

874 875 876 877
	int exclude = eu | ek | eh;
	int exclude_GH = evsel ? evsel->exclude_GH : 0;

	memset(mod, 0, sizeof(*mod));
878

879
	while (*str) {
P
Peter Zijlstra 已提交
880 881 882
		if (*str == 'u') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
883
			eu = 0;
P
Peter Zijlstra 已提交
884 885 886
		} else if (*str == 'k') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
887
			ek = 0;
P
Peter Zijlstra 已提交
888 889 890
		} else if (*str == 'h') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
891
			eh = 0;
892 893 894 895 896 897 898 899
		} else if (*str == 'G') {
			if (!exclude_GH)
				exclude_GH = eG = eH = 1;
			eG = 0;
		} else if (*str == 'H') {
			if (!exclude_GH)
				exclude_GH = eG = eH = 1;
			eH = 0;
900 901
		} else if (*str == 'I') {
			eI = 1;
P
Peter Zijlstra 已提交
902 903
		} else if (*str == 'p') {
			precise++;
904 905 906
			/* use of precise requires exclude_guest */
			if (!exclude_GH)
				eG = 1;
907 908
		} else if (*str == 'S') {
			sample_read = 1;
909 910
		} else if (*str == 'D') {
			pinned = 1;
P
Peter Zijlstra 已提交
911
		} else
912
			break;
P
Peter Zijlstra 已提交
913

914
		++str;
915
	}
916

917 918 919 920 921 922 923 924 925 926 927 928
	/*
	 * precise ip:
	 *
	 *  0 - SAMPLE_IP can have arbitrary skid
	 *  1 - SAMPLE_IP must have constant skid
	 *  2 - SAMPLE_IP requested to have 0 skid
	 *  3 - SAMPLE_IP must have 0 skid
	 *
	 *  See also PERF_RECORD_MISC_EXACT_IP
	 */
	if (precise > 3)
		return -EINVAL;
929

930 931 932 933 934
	mod->eu = eu;
	mod->ek = ek;
	mod->eh = eh;
	mod->eH = eH;
	mod->eG = eG;
935
	mod->eI = eI;
936 937
	mod->precise = precise;
	mod->exclude_GH = exclude_GH;
938
	mod->sample_read = sample_read;
939 940
	mod->pinned = pinned;

941 942 943
	return 0;
}

944 945 946 947 948 949 950 951 952
/*
 * Basic modifier sanity check to validate it contains only one
 * instance of any modifier (apart from 'p') present.
 */
static int check_modifier(char *str)
{
	char *p = str;

	/* The sizeof includes 0 byte as well. */
953
	if (strlen(str) > (sizeof("ukhGHpppSDI") - 1))
954 955 956 957 958 959 960 961 962 963 964
		return -1;

	while (*p) {
		if (*p != 'p' && strchr(p + 1, *p))
			return -1;
		p++;
	}

	return 0;
}

965 966 967 968 969 970 971 972
int parse_events__modifier_event(struct list_head *list, char *str, bool add)
{
	struct perf_evsel *evsel;
	struct event_modifier mod;

	if (str == NULL)
		return 0;

973 974 975
	if (check_modifier(str))
		return -EINVAL;

976 977 978
	if (!add && get_event_modifier(&mod, str, NULL))
		return -EINVAL;

979
	__evlist__for_each(list, evsel) {
980 981 982 983 984 985 986 987 988
		if (add && get_event_modifier(&mod, str, evsel))
			return -EINVAL;

		evsel->attr.exclude_user   = mod.eu;
		evsel->attr.exclude_kernel = mod.ek;
		evsel->attr.exclude_hv     = mod.eh;
		evsel->attr.precise_ip     = mod.precise;
		evsel->attr.exclude_host   = mod.eH;
		evsel->attr.exclude_guest  = mod.eG;
989
		evsel->attr.exclude_idle   = mod.eI;
990
		evsel->exclude_GH          = mod.exclude_GH;
991
		evsel->sample_read         = mod.sample_read;
992 993 994

		if (perf_evsel__is_group_leader(evsel))
			evsel->attr.pinned = mod.pinned;
995
	}
996

997 998
	return 0;
}
999

1000 1001 1002 1003
int parse_events_name(struct list_head *list, char *name)
{
	struct perf_evsel *evsel;

1004
	__evlist__for_each(list, evsel) {
1005 1006 1007 1008 1009 1010 1011
		if (!evsel->name)
			evsel->name = strdup(name);
	}

	return 0;
}

1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
static int
comp_pmu(const void *p1, const void *p2)
{
	struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
	struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;

	return strcmp(pmu1->symbol, pmu2->symbol);
}

static void perf_pmu__parse_cleanup(void)
{
	if (perf_pmu_events_list_num > 0) {
		struct perf_pmu_event_symbol *p;
		int i;

		for (i = 0; i < perf_pmu_events_list_num; i++) {
			p = perf_pmu_events_list + i;
			free(p->symbol);
		}
		free(perf_pmu_events_list);
		perf_pmu_events_list = NULL;
		perf_pmu_events_list_num = 0;
	}
}

#define SET_SYMBOL(str, stype)		\
do {					\
	p->symbol = str;		\
	if (!p->symbol)			\
		goto err;		\
	p->type = stype;		\
} while (0)

/*
 * Read the pmu events list from sysfs
 * Save it into perf_pmu_events_list
 */
static void perf_pmu__parse_init(void)
{

	struct perf_pmu *pmu = NULL;
	struct perf_pmu_alias *alias;
	int len = 0;

	pmu = perf_pmu__find("cpu");
	if ((pmu == NULL) || list_empty(&pmu->aliases)) {
		perf_pmu_events_list_num = -1;
		return;
	}
	list_for_each_entry(alias, &pmu->aliases, list) {
		if (strchr(alias->name, '-'))
			len++;
		len++;
	}
	perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
	if (!perf_pmu_events_list)
		return;
	perf_pmu_events_list_num = len;

	len = 0;
	list_for_each_entry(alias, &pmu->aliases, list) {
		struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
		char *tmp = strchr(alias->name, '-');

		if (tmp != NULL) {
			SET_SYMBOL(strndup(alias->name, tmp - alias->name),
					PMU_EVENT_SYMBOL_PREFIX);
			p++;
			SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
			len += 2;
		} else {
			SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
			len++;
		}
	}
	qsort(perf_pmu_events_list, len,
		sizeof(struct perf_pmu_event_symbol), comp_pmu);

	return;
err:
	perf_pmu__parse_cleanup();
}

enum perf_pmu_event_symbol_type
perf_pmu__parse_check(const char *name)
{
	struct perf_pmu_event_symbol p, *r;

	/* scan kernel pmu events from sysfs if needed */
	if (perf_pmu_events_list_num == 0)
		perf_pmu__parse_init();
	/*
	 * name "cpu" could be prefix of cpu-cycles or cpu// events.
	 * cpu-cycles has been handled by hardcode.
	 * So it must be cpu// events, not kernel pmu event.
	 */
	if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
		return PMU_EVENT_SYMBOL_ERR;

	p.symbol = strdup(name);
	r = bsearch(&p, perf_pmu_events_list,
			(size_t) perf_pmu_events_list_num,
			sizeof(struct perf_pmu_event_symbol), comp_pmu);
	free(p.symbol);
	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
}

1119
static int parse_events__scanner(const char *str, void *data, int start_token)
1120
{
1121
	YY_BUFFER_STATE buffer;
1122
	void *scanner;
1123
	int ret;
1124

1125
	ret = parse_events_lex_init_extra(start_token, &scanner);
1126 1127 1128 1129
	if (ret)
		return ret;

	buffer = parse_events__scan_string(str, scanner);
1130

1131 1132 1133
#ifdef PARSER_DEBUG
	parse_events_debug = 1;
#endif
1134 1135 1136 1137 1138 1139 1140
	ret = parse_events_parse(data, scanner);

	parse_events__flush_buffer(buffer, scanner);
	parse_events__delete_buffer(buffer, scanner);
	parse_events_lex_destroy(scanner);
	return ret;
}
1141

1142 1143 1144 1145 1146
/*
 * parse event config string, return a list of event terms.
 */
int parse_events_terms(struct list_head *terms, const char *str)
{
1147
	struct parse_events_terms data = {
1148 1149 1150 1151 1152 1153 1154
		.terms = NULL,
	};
	int ret;

	ret = parse_events__scanner(str, &data, PE_START_TERMS);
	if (!ret) {
		list_splice(data.terms, terms);
1155
		zfree(&data.terms);
1156 1157 1158
		return 0;
	}

1159 1160
	if (data.terms)
		parse_events__free_terms(data.terms);
1161 1162 1163
	return ret;
}

1164 1165
int parse_events(struct perf_evlist *evlist, const char *str,
		 struct parse_events_error *err)
1166
{
1167
	struct parse_events_evlist data = {
1168 1169 1170
		.list  = LIST_HEAD_INIT(data.list),
		.idx   = evlist->nr_entries,
		.error = err,
1171 1172
	};
	int ret;
1173

1174
	ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1175
	perf_pmu__parse_cleanup();
1176
	if (!ret) {
1177 1178
		struct perf_evsel *last;

1179
		perf_evlist__splice_list_tail(evlist, &data.list);
1180
		evlist->nr_groups += data.nr_groups;
1181 1182 1183
		last = perf_evlist__last(evlist);
		last->cmdline_group_boundary = true;

1184 1185
		return 0;
	}
1186

1187 1188 1189 1190 1191
	/*
	 * There are 2 users - builtin-record and builtin-test objects.
	 * Both call perf_evlist__delete in case of error, so we dont
	 * need to bother.
	 */
1192
	return ret;
1193 1194
}

1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221
#define MAX_WIDTH 1000
static int get_term_width(void)
{
	struct winsize ws;

	get_term_dimensions(&ws);
	return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
}

static void parse_events_print_error(struct parse_events_error *err,
				     const char *event)
{
	const char *str = "invalid or unsupported event: ";
	char _buf[MAX_WIDTH];
	char *buf = (char *) event;
	int idx = 0;

	if (err->str) {
		/* -2 for extra '' in the final fprintf */
		int width       = get_term_width() - 2;
		int len_event   = strlen(event);
		int len_str, max_len, cut = 0;

		/*
		 * Maximum error index indent, we will cut
		 * the event string if it's bigger.
		 */
1222
		int max_err_idx = 13;
1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265

		/*
		 * Let's be specific with the message when
		 * we have the precise error.
		 */
		str     = "event syntax error: ";
		len_str = strlen(str);
		max_len = width - len_str;

		buf = _buf;

		/* We're cutting from the beggining. */
		if (err->idx > max_err_idx)
			cut = err->idx - max_err_idx;

		strncpy(buf, event + cut, max_len);

		/* Mark cut parts with '..' on both sides. */
		if (cut)
			buf[0] = buf[1] = '.';

		if ((len_event - cut) > max_len) {
			buf[max_len - 1] = buf[max_len - 2] = '.';
			buf[max_len] = 0;
		}

		idx = len_str + err->idx - cut;
	}

	fprintf(stderr, "%s'%s'\n", str, buf);
	if (idx) {
		fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
		if (err->help)
			fprintf(stderr, "\n%s\n", err->help);
		free(err->str);
		free(err->help);
	}

	fprintf(stderr, "Run 'perf list' for a list of valid events\n");
}

#undef MAX_WIDTH

1266
int parse_events_option(const struct option *opt, const char *str,
1267
			int unset __maybe_unused)
1268 1269
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1270 1271 1272 1273 1274
	struct parse_events_error err = { .idx = 0, };
	int ret = parse_events(evlist, str, &err);

	if (ret)
		parse_events_print_error(&err, str);
1275 1276

	return ret;
1277 1278
}

1279 1280 1281 1282 1283
static int
foreach_evsel_in_last_glob(struct perf_evlist *evlist,
			   int (*func)(struct perf_evsel *evsel,
				       const void *arg),
			   const void *arg)
L
Li Zefan 已提交
1284
{
1285
	struct perf_evsel *last = NULL;
1286
	int err;
L
Li Zefan 已提交
1287

1288
	if (evlist->nr_entries > 0)
1289
		last = perf_evlist__last(evlist);
1290

1291
	do {
1292 1293
		err = (*func)(last, arg);
		if (err)
1294
			return -1;
1295 1296
		if (!last)
			return 0;
1297 1298 1299 1300 1301

		if (last->node.prev == &evlist->entries)
			return 0;
		last = list_entry(last->node.prev, struct perf_evsel, node);
	} while (!last->cmdline_group_boundary);
L
Li Zefan 已提交
1302 1303 1304 1305

	return 0;
}

1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
static int set_filter(struct perf_evsel *evsel, const void *arg)
{
	const char *str = arg;

	if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
		fprintf(stderr,
			"--filter option should follow a -e tracepoint option\n");
		return -1;
	}

	if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
}

int parse_filter(const struct option *opt, const char *str,
		 int unset __maybe_unused)
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;

	return foreach_evsel_in_last_glob(evlist, set_filter,
					  (const void *)str);
}

static int add_exclude_perf_filter(struct perf_evsel *evsel,
				   const void *arg __maybe_unused)
{
	char new_filter[64];

	if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
		fprintf(stderr,
			"--exclude-perf option should follow a -e tracepoint option\n");
		return -1;
	}

	snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());

	if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
}

int exclude_perf(const struct option *opt,
		 const char *arg __maybe_unused,
		 int unset __maybe_unused)
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;

	return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
					  NULL);
}

1366 1367 1368 1369 1370
static const char * const event_type_descriptors[] = {
	"Hardware event",
	"Software event",
	"Tracepoint event",
	"Hardware cache event",
1371 1372
	"Raw hardware event descriptor",
	"Hardware breakpoint",
1373 1374
};

1375 1376 1377 1378 1379 1380 1381 1382
static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;

	return strcmp(*as, *bs);
}

1383 1384 1385 1386
/*
 * Print the events from <debugfs_mount_point>/tracing/events
 */

1387 1388
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
			     bool name_only)
1389 1390 1391 1392
{
	DIR *sys_dir, *evt_dir;
	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
	char evt_path[MAXPATHLEN];
E
Eric Dumazet 已提交
1393
	char dir_path[MAXPATHLEN];
1394 1395 1396
	char **evt_list = NULL;
	unsigned int evt_i = 0, evt_num = 0;
	bool evt_num_known = false;
1397

1398
restart:
1399
	sys_dir = opendir(tracing_events_path);
1400
	if (!sys_dir)
E
Eric Dumazet 已提交
1401
		return;
1402

1403 1404 1405 1406 1407 1408
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_close_sys_dir;
	}

1409
	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1410
		if (subsys_glob != NULL &&
1411 1412
		    !strglobmatch(sys_dirent.d_name, subsys_glob))
			continue;
E
Eric Dumazet 已提交
1413

1414
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
E
Eric Dumazet 已提交
1415 1416 1417
			 sys_dirent.d_name);
		evt_dir = opendir(dir_path);
		if (!evt_dir)
1418
			continue;
E
Eric Dumazet 已提交
1419

1420
		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1421
			if (event_glob != NULL &&
1422 1423 1424
			    !strglobmatch(evt_dirent.d_name, event_glob))
				continue;

1425 1426
			if (!evt_num_known) {
				evt_num++;
1427 1428 1429
				continue;
			}

1430 1431
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
				 sys_dirent.d_name, evt_dirent.d_name);
1432 1433 1434 1435 1436

			evt_list[evt_i] = strdup(evt_path);
			if (evt_list[evt_i] == NULL)
				goto out_close_evt_dir;
			evt_i++;
1437 1438 1439 1440
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474

	if (!evt_num_known) {
		evt_num_known = true;
		goto restart;
	}
	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
	evt_i = 0;
	while (evt_i < evt_num) {
		if (name_only) {
			printf("%s ", evt_list[evt_i++]);
			continue;
		}
		printf("  %-50s [%s]\n", evt_list[evt_i++],
				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
	}
	if (evt_num)
		printf("\n");

out_free:
	evt_num = evt_i;
	for (evt_i = 0; evt_i < evt_num; evt_i++)
		zfree(&evt_list[evt_i]);
	zfree(&evt_list);
	return;

out_close_evt_dir:
	closedir(evt_dir);
out_close_sys_dir:
	closedir(sys_dir);

	printf("FATAL: not enough memory to print %s\n",
			event_type_descriptors[PERF_TYPE_TRACEPOINT]);
	if (evt_list)
		goto out_free;
1475 1476
}

1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
/*
 * Check whether event is in <debugfs_mount_point>/tracing/events
 */

int is_valid_tracepoint(const char *event_string)
{
	DIR *sys_dir, *evt_dir;
	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
	char evt_path[MAXPATHLEN];
	char dir_path[MAXPATHLEN];

1488
	sys_dir = opendir(tracing_events_path);
1489 1490 1491 1492 1493
	if (!sys_dir)
		return 0;

	for_each_subsystem(sys_dir, sys_dirent, sys_next) {

1494
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514
			 sys_dirent.d_name);
		evt_dir = opendir(dir_path);
		if (!evt_dir)
			continue;

		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
				 sys_dirent.d_name, evt_dirent.d_name);
			if (!strcmp(evt_path, event_string)) {
				closedir(evt_dir);
				closedir(sys_dir);
				return 1;
			}
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
	return 0;
}

1515 1516 1517
static bool is_event_supported(u8 type, unsigned config)
{
	bool ret = true;
1518
	int open_return;
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532
	struct perf_evsel *evsel;
	struct perf_event_attr attr = {
		.type = type,
		.config = config,
		.disabled = 1,
	};
	struct {
		struct thread_map map;
		int threads[1];
	} tmap = {
		.map.nr	 = 1,
		.threads = { 0 },
	};

1533
	evsel = perf_evsel__new(&attr);
1534
	if (evsel) {
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
		open_return = perf_evsel__open(evsel, NULL, &tmap.map);
		ret = open_return >= 0;

		if (open_return == -EACCES) {
			/*
			 * This happens if the paranoid value
			 * /proc/sys/kernel/perf_event_paranoid is set to 2
			 * Re-run with exclude_kernel set; we don't do that
			 * by default as some ARM machines do not support it.
			 *
			 */
			evsel->attr.exclude_kernel = 1;
			ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
		}
1549 1550 1551 1552 1553 1554
		perf_evsel__delete(evsel);
	}

	return ret;
}

1555
int print_hwcache_events(const char *event_glob, bool name_only)
1556
{
1557
	unsigned int type, op, i, evt_i = 0, evt_num = 0;
1558
	char name[64];
1559 1560 1561 1562 1563 1564 1565 1566 1567
	char **evt_list = NULL;
	bool evt_num_known = false;

restart:
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_enomem;
	}
1568 1569 1570 1571

	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
			/* skip invalid cache type */
1572
			if (!perf_evsel__is_cache_op_valid(type, op))
1573 1574 1575
				continue;

			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1576 1577
				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
									name, sizeof(name));
1578
				if (event_glob != NULL && !strglobmatch(name, event_glob))
1579 1580
					continue;

1581 1582 1583 1584
				if (!is_event_supported(PERF_TYPE_HW_CACHE,
							type | (op << 8) | (i << 16)))
					continue;

1585 1586 1587 1588 1589 1590 1591 1592 1593
				if (!evt_num_known) {
					evt_num++;
					continue;
				}

				evt_list[evt_i] = strdup(name);
				if (evt_list[evt_i] == NULL)
					goto out_enomem;
				evt_i++;
1594 1595 1596 1597
			}
		}
	}

1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612
	if (!evt_num_known) {
		evt_num_known = true;
		goto restart;
	}
	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
	evt_i = 0;
	while (evt_i < evt_num) {
		if (name_only) {
			printf("%s ", evt_list[evt_i++]);
			continue;
		}
		printf("  %-50s [%s]\n", evt_list[evt_i++],
				event_type_descriptors[PERF_TYPE_HW_CACHE]);
	}
	if (evt_num)
1613
		printf("\n");
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626

out_free:
	evt_num = evt_i;
	for (evt_i = 0; evt_i < evt_num; evt_i++)
		zfree(&evt_list[evt_i]);
	zfree(&evt_list);
	return evt_num;

out_enomem:
	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
	if (evt_list)
		goto out_free;
	return evt_num;
1627 1628
}

1629
void print_symbol_events(const char *event_glob, unsigned type,
1630 1631
				struct event_symbol *syms, unsigned max,
				bool name_only)
1632
{
1633
	unsigned int i, evt_i = 0, evt_num = 0;
1634
	char name[MAX_NAME_LEN];
1635 1636 1637 1638 1639 1640 1641 1642 1643 1644
	char **evt_list = NULL;
	bool evt_num_known = false;

restart:
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_enomem;
		syms -= max;
	}
1645

1646
	for (i = 0; i < max; i++, syms++) {
1647

1648
		if (event_glob != NULL &&
1649 1650 1651
		    !(strglobmatch(syms->symbol, event_glob) ||
		      (syms->alias && strglobmatch(syms->alias, event_glob))))
			continue;
1652

1653 1654 1655
		if (!is_event_supported(type, i))
			continue;

1656 1657
		if (!evt_num_known) {
			evt_num++;
1658 1659 1660
			continue;
		}

1661
		if (!name_only && strlen(syms->alias))
1662
			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1663
		else
1664
			strncpy(name, syms->symbol, MAX_NAME_LEN);
1665

1666 1667 1668 1669
		evt_list[evt_i] = strdup(name);
		if (evt_list[evt_i] == NULL)
			goto out_enomem;
		evt_i++;
1670 1671
	}

1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
	if (!evt_num_known) {
		evt_num_known = true;
		goto restart;
	}
	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
	evt_i = 0;
	while (evt_i < evt_num) {
		if (name_only) {
			printf("%s ", evt_list[evt_i++]);
			continue;
		}
		printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
	}
	if (evt_num)
1686
		printf("\n");
1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698

out_free:
	evt_num = evt_i;
	for (evt_i = 0; evt_i < evt_num; evt_i++)
		zfree(&evt_list[evt_i]);
	zfree(&evt_list);
	return;

out_enomem:
	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
	if (evt_list)
		goto out_free;
1699 1700 1701 1702 1703
}

/*
 * Print the help text for the event symbols:
 */
1704
void print_events(const char *event_glob, bool name_only)
1705 1706
{
	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1707
			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1708 1709

	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1710
			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1711

1712
	print_hwcache_events(event_glob, name_only);
1713

1714 1715
	print_pmu_events(event_glob, name_only);

1716 1717
	if (event_glob != NULL)
		return;
1718

1719 1720 1721 1722 1723 1724 1725
	if (!name_only) {
		printf("  %-50s [%s]\n",
		       "rNNN",
		       event_type_descriptors[PERF_TYPE_RAW]);
		printf("  %-50s [%s]\n",
		       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
		       event_type_descriptors[PERF_TYPE_RAW]);
1726
		printf("   (see 'man perf-list' on how to encode it)\n");
1727 1728 1729
		printf("\n");

		printf("  %-50s [%s]\n",
1730
		       "mem:<addr>[/len][:access]",
1731
			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1732 1733
		printf("\n");
	}
1734

1735
	print_tracepoint_events(NULL, NULL, name_only);
1736
}
1737

1738
int parse_events__is_hardcoded_term(struct parse_events_term *term)
1739
{
1740
	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1741 1742
}

1743
static int new_term(struct parse_events_term **_term, int type_val,
1744
		    int type_term, char *config,
1745
		    char *str, u64 num, int err_term, int err_val)
1746
{
1747
	struct parse_events_term *term;
1748 1749 1750 1751 1752 1753

	term = zalloc(sizeof(*term));
	if (!term)
		return -ENOMEM;

	INIT_LIST_HEAD(&term->list);
1754 1755
	term->type_val  = type_val;
	term->type_term = type_term;
1756
	term->config = config;
1757 1758
	term->err_term = err_term;
	term->err_val  = err_val;
1759

1760
	switch (type_val) {
1761 1762 1763 1764 1765 1766 1767
	case PARSE_EVENTS__TERM_TYPE_NUM:
		term->val.num = num;
		break;
	case PARSE_EVENTS__TERM_TYPE_STR:
		term->val.str = str;
		break;
	default:
1768
		free(term);
1769 1770 1771 1772 1773 1774 1775
		return -EINVAL;
	}

	*_term = term;
	return 0;
}

1776
int parse_events_term__num(struct parse_events_term **term,
1777
			   int type_term, char *config, u64 num,
1778
			   void *loc_term_, void *loc_val_)
1779
{
1780 1781 1782
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

1783
	return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1784 1785 1786
			config, NULL, num,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
1787 1788
}

1789
int parse_events_term__str(struct parse_events_term **term,
1790
			   int type_term, char *config, char *str,
1791
			   void *loc_term_, void *loc_val_)
1792
{
1793 1794 1795
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

1796
	return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1797 1798 1799
			config, str, 0,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
1800 1801
}

1802
int parse_events_term__sym_hw(struct parse_events_term **term,
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812
			      char *config, unsigned idx)
{
	struct event_symbol *sym;

	BUG_ON(idx >= PERF_COUNT_HW_MAX);
	sym = &event_symbols_hw[idx];

	if (config)
		return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
				PARSE_EVENTS__TERM_TYPE_USER, config,
1813
				(char *) sym->symbol, 0, 0, 0);
1814 1815 1816
	else
		return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
				PARSE_EVENTS__TERM_TYPE_USER,
1817 1818
				(char *) "event", (char *) sym->symbol,
				0, 0, 0);
1819 1820
}

1821 1822
int parse_events_term__clone(struct parse_events_term **new,
			     struct parse_events_term *term)
1823 1824
{
	return new_term(new, term->type_val, term->type_term, term->config,
1825 1826
			term->val.str, term->val.num,
			term->err_term, term->err_val);
1827 1828
}

1829 1830
void parse_events__free_terms(struct list_head *terms)
{
1831
	struct parse_events_term *term, *h;
1832 1833 1834 1835

	list_for_each_entry_safe(term, h, terms, list)
		free(term);
}
1836 1837 1838 1839 1840 1841

void parse_events_evlist_error(struct parse_events_evlist *data,
			       int idx, const char *str)
{
	struct parse_events_error *err = data->error;

1842 1843
	if (!err)
		return;
1844 1845 1846 1847
	err->idx = idx;
	err->str = strdup(str);
	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
}