parse-events.c 57.5 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 <subcmd/parse-options.h>
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#include "parse-events.h"
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#include <subcmd/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 "bpf-loader.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 "probe-file.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 int get_config_terms(struct list_head *head_config,
			    struct list_head *head_terms __maybe_unused);
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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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	[PERF_COUNT_SW_BPF_OUTPUT] = {
		.symbol = "bpf-output",
		.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)			\
	while ((sys_dirent = readdir(sys_dir)) != NULL)		\
		if (sys_dirent->d_type == DT_DIR &&		\
		    (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)		\
	while ((evt_dirent = readdir(evt_dir)) != NULL)		\
		if (evt_dirent->d_type == DT_DIR &&		\
		    (strcmp(evt_dirent->d_name, ".")) &&	\
		    (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;
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	struct dirent *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) {
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		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
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			 sys_dirent->d_name);
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		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) {
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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;
				}
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				strncpy(path->system, sys_dirent->d_name,
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					MAX_EVENT_LENGTH);
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				strncpy(path->name, evt_dirent->d_name,
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					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 int parse_events__is_name_term(struct parse_events_term *term)
{
	return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
}
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static char *get_config_name(struct list_head *head_terms)
{
	struct parse_events_term *term;

	if (!head_terms)
		return NULL;

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

	return NULL;
}
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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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typedef int config_term_func_t(struct perf_event_attr *attr,
			       struct parse_events_term *term,
			       struct parse_events_error *err);
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err);
static int config_attr(struct perf_event_attr *attr,
		       struct list_head *head,
		       struct parse_events_error *err,
		       config_term_func_t config_term);

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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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			   struct parse_events_error *err,
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			   struct list_head *head_config)
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{
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	struct perf_event_attr attr;
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	LIST_HEAD(config_terms);
	char name[MAX_NAME_LEN], *config_name;
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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;

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	config_name = get_config_name(head_config);
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	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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	if (head_config) {
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		if (config_attr(&attr, head_config, err,
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				config_term_common))
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
	return add_event(list, idx, &attr, config_name ? : name, &config_terms);
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}

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

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	if (!e)
		return;

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

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

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

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static int add_tracepoint(struct list_head *list, int *idx,
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			  const char *sys_name, const char *evt_name,
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			  struct parse_events_error *err,
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			  struct list_head *head_config)
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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)) {
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		tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
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		return PTR_ERR(evsel);
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	}
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	if (head_config) {
		LIST_HEAD(config_terms);

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
		list_splice(&config_terms, &evsel->config_terms);
	}

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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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				      const char *sys_name, const char *evt_name,
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				      struct parse_events_error *err,
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				      struct list_head *head_config)
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{
	char evt_path[MAXPATHLEN];
	struct dirent *evt_ent;
	DIR *evt_dir;
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	int ret = 0, found = 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(err, 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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		found++;

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

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	if (!found) {
		tracepoint_error(err, ENOENT, sys_name, evt_name);
		ret = -1;
	}

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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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				const char *sys_name, const char *evt_name,
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				struct parse_events_error *err,
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				struct list_head *head_config)
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{
	return strpbrk(evt_name, "*?") ?
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	       add_tracepoint_multi_event(list, idx, sys_name, evt_name,
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					  err, head_config) :
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	       add_tracepoint(list, idx, sys_name, evt_name,
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			      err, head_config);
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}

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static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
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				    const char *sys_name, const char *evt_name,
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				    struct parse_events_error *err,
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				    struct list_head *head_config)
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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(err, 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, err, head_config);
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	}

	closedir(events_dir);
	return ret;
}

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struct __add_bpf_event_param {
	struct parse_events_evlist *data;
	struct list_head *list;
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	struct list_head *head_config;
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};

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static int add_bpf_event(const char *group, const char *event, int fd,
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			 void *_param)
{
	LIST_HEAD(new_evsels);
	struct __add_bpf_event_param *param = _param;
	struct parse_events_evlist *evlist = param->data;
	struct list_head *list = param->list;
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	struct perf_evsel *pos;
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	int err;

	pr_debug("add bpf event %s:%s and attach bpf program %d\n",
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		 group, event, fd);
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	err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, group,
					  event, evlist->error,
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					  param->head_config);
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	if (err) {
		struct perf_evsel *evsel, *tmp;

		pr_debug("Failed to add BPF event %s:%s\n",
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			 group, event);
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		list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
			list_del(&evsel->node);
			perf_evsel__delete(evsel);
		}
		return err;
	}
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	pr_debug("adding %s:%s\n", group, event);
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	list_for_each_entry(pos, &new_evsels, node) {
		pr_debug("adding %s:%s to %p\n",
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			 group, event, pos);
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		pos->bpf_fd = fd;
	}
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	list_splice(&new_evsels, list);
	return 0;
}

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int parse_events_load_bpf_obj(struct parse_events_evlist *data,
			      struct list_head *list,
628 629
			      struct bpf_object *obj,
			      struct list_head *head_config)
630 631 632
{
	int err;
	char errbuf[BUFSIZ];
633
	struct __add_bpf_event_param param = {data, list, head_config};
634
	static bool registered_unprobe_atexit = false;
635 636 637 638 639 640 641 642

	if (IS_ERR(obj) || !obj) {
		snprintf(errbuf, sizeof(errbuf),
			 "Internal error: load bpf obj with NULL");
		err = -EINVAL;
		goto errout;
	}

643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658
	/*
	 * Register atexit handler before calling bpf__probe() so
	 * bpf__probe() don't need to unprobe probe points its already
	 * created when failure.
	 */
	if (!registered_unprobe_atexit) {
		atexit(bpf__clear);
		registered_unprobe_atexit = true;
	}

	err = bpf__probe(obj);
	if (err) {
		bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
		goto errout;
	}

659 660 661 662 663 664
	err = bpf__load(obj);
	if (err) {
		bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
		goto errout;
	}

665
	err = bpf__foreach_event(obj, add_bpf_event, &param);
666 667 668 669 670 671 672
	if (err) {
		snprintf(errbuf, sizeof(errbuf),
			 "Attach events in BPF object failed");
		goto errout;
	}

	return 0;
673 674 675 676 677 678
errout:
	data->error->help = strdup("(add -v to see detail)");
	data->error->str = strdup(errbuf);
	return err;
}

679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703
static int
parse_events_config_bpf(struct parse_events_evlist *data,
			struct bpf_object *obj,
			struct list_head *head_config)
{
	struct parse_events_term *term;
	int error_pos;

	if (!head_config || list_empty(head_config))
		return 0;

	list_for_each_entry(term, head_config, list) {
		char errbuf[BUFSIZ];
		int err;

		if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
			snprintf(errbuf, sizeof(errbuf),
				 "Invalid config term for BPF object");
			errbuf[BUFSIZ - 1] = '\0';

			data->error->idx = term->err_term;
			data->error->str = strdup(errbuf);
			return -EINVAL;
		}

704
		err = bpf__config_obj(obj, term, data->evlist, &error_pos);
705
		if (err) {
706
			bpf__strerror_config_obj(obj, term, data->evlist,
707 708 709
						 &error_pos, err, errbuf,
						 sizeof(errbuf));
			data->error->help = strdup(
710
"Hint:\tValid config terms:\n"
711 712
"     \tmap:[<arraymap>].value<indices>=[value]\n"
"     \tmap:[<eventmap>].event<indices>=[event]\n"
713
"\n"
714
"     \twhere <indices> is something like [0,3...5] or [all]\n"
715 716 717 718 719 720 721 722 723 724 725 726
"     \t(add -v to see detail)");
			data->error->str = strdup(errbuf);
			if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
				data->error->idx = term->err_val;
			else
				data->error->idx = term->err_term + error_pos;
			return err;
		}
	}
	return 0;
}

727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755
/*
 * Split config terms:
 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 *  'call-graph=fp' is 'evt config', should be applied to each
 *  events in bpf.c.
 * 'map:array.value[0]=1' is 'obj config', should be processed
 * with parse_events_config_bpf.
 *
 * Move object config terms from the first list to obj_head_config.
 */
static void
split_bpf_config_terms(struct list_head *evt_head_config,
		       struct list_head *obj_head_config)
{
	struct parse_events_term *term, *temp;

	/*
	 * Currectly, all possible user config term
	 * belong to bpf object. parse_events__is_hardcoded_term()
	 * happends to be a good flag.
	 *
	 * See parse_events_config_bpf() and
	 * config_term_tracepoint().
	 */
	list_for_each_entry_safe(term, temp, evt_head_config, list)
		if (!parse_events__is_hardcoded_term(term))
			list_move_tail(&term->list, obj_head_config);
}

756 757
int parse_events_load_bpf(struct parse_events_evlist *data,
			  struct list_head *list,
758
			  char *bpf_file_name,
759 760
			  bool source,
			  struct list_head *head_config)
761
{
762
	int err;
763 764 765 766 767
	struct bpf_object *obj;
	LIST_HEAD(obj_head_config);

	if (head_config)
		split_bpf_config_terms(head_config, &obj_head_config);
768

769
	obj = bpf__prepare_load(bpf_file_name, source);
770
	if (IS_ERR(obj)) {
771 772
		char errbuf[BUFSIZ];

773
		err = PTR_ERR(obj);
774 775 776 777 778

		if (err == -ENOTSUP)
			snprintf(errbuf, sizeof(errbuf),
				 "BPF support is not compiled");
		else
779 780 781 782
			bpf__strerror_prepare_load(bpf_file_name,
						   source,
						   -err, errbuf,
						   sizeof(errbuf));
783 784 785 786 787 788

		data->error->help = strdup("(add -v to see detail)");
		data->error->str = strdup(errbuf);
		return err;
	}

789
	err = parse_events_load_bpf_obj(data, list, obj, head_config);
790 791
	if (err)
		return err;
792 793 794 795 796 797 798 799 800
	err = parse_events_config_bpf(data, obj, &obj_head_config);

	/*
	 * Caller doesn't know anything about obj_head_config,
	 * so combine them together again before returnning.
	 */
	if (head_config)
		list_splice_tail(&obj_head_config, head_config);
	return err;
801 802
}

803 804
static int
parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
805 806 807 808
{
	int i;

	for (i = 0; i < 3; i++) {
809
		if (!type || !type[i])
810 811
			break;

812 813 814 815 816 817 818 819
#define CHECK_SET_TYPE(bit)		\
do {					\
	if (attr->bp_type & bit)	\
		return -EINVAL;		\
	else				\
		attr->bp_type |= bit;	\
} while (0)

820 821
		switch (type[i]) {
		case 'r':
822
			CHECK_SET_TYPE(HW_BREAKPOINT_R);
823 824
			break;
		case 'w':
825
			CHECK_SET_TYPE(HW_BREAKPOINT_W);
826 827
			break;
		case 'x':
828
			CHECK_SET_TYPE(HW_BREAKPOINT_X);
829 830
			break;
		default:
831
			return -EINVAL;
832 833
		}
	}
834

835 836
#undef CHECK_SET_TYPE

837 838 839
	if (!attr->bp_type) /* Default */
		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;

840
	return 0;
841 842
}

843
int parse_events_add_breakpoint(struct list_head *list, int *idx,
844
				void *ptr, char *type, u64 len)
845
{
846
	struct perf_event_attr attr;
847

848
	memset(&attr, 0, sizeof(attr));
849
	attr.bp_addr = (unsigned long) ptr;
850

851 852
	if (parse_breakpoint_type(type, &attr))
		return -EINVAL;
853

854 855 856 857 858 859 860 861 862
	/* 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;
863

864
	attr.type = PERF_TYPE_BREAKPOINT;
865
	attr.sample_period = 1;
866

867
	return add_event(list, idx, &attr, NULL, NULL);
868 869
}

870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
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;
}

887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
/*
 * Update according to parse-events.l
 */
static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
	[PARSE_EVENTS__TERM_TYPE_USER]			= "<sysfs term>",
	[PARSE_EVENTS__TERM_TYPE_CONFIG]		= "config",
	[PARSE_EVENTS__TERM_TYPE_CONFIG1]		= "config1",
	[PARSE_EVENTS__TERM_TYPE_CONFIG2]		= "config2",
	[PARSE_EVENTS__TERM_TYPE_NAME]			= "name",
	[PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]		= "period",
	[PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]		= "freq",
	[PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]	= "branch_type",
	[PARSE_EVENTS__TERM_TYPE_TIME]			= "time",
	[PARSE_EVENTS__TERM_TYPE_CALLGRAPH]		= "call-graph",
	[PARSE_EVENTS__TERM_TYPE_STACKSIZE]		= "stack-size",
	[PARSE_EVENTS__TERM_TYPE_NOINHERIT]		= "no-inherit",
	[PARSE_EVENTS__TERM_TYPE_INHERIT]		= "inherit",
904
	[PARSE_EVENTS__TERM_TYPE_MAX_STACK]		= "max-stack",
W
Wang Nan 已提交
905 906
	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
907
	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
908 909
};

910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
static bool config_term_shrinked;

static bool
config_term_avail(int term_type, struct parse_events_error *err)
{
	if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
		err->str = strdup("Invalid term_type");
		return false;
	}
	if (!config_term_shrinked)
		return true;

	switch (term_type) {
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
	case PARSE_EVENTS__TERM_TYPE_NAME:
927
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945
		return true;
	default:
		if (!err)
			return false;

		/* term_type is validated so indexing is safe */
		if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
			     config_term_names[term_type]) < 0)
			err->str = NULL;
		return false;
	}
}

void parse_events__shrink_config_terms(void)
{
	config_term_shrinked = true;
}

946 947 948
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err)
949
{
950 951 952 953
#define CHECK_TYPE_VAL(type)						   \
do {									   \
	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
		return -EINVAL;						   \
954 955 956
} while (0)

	switch (term->type_term) {
957
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
958
		CHECK_TYPE_VAL(NUM);
959 960 961
		attr->config = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
962
		CHECK_TYPE_VAL(NUM);
963 964 965
		attr->config1 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
966
		CHECK_TYPE_VAL(NUM);
967 968 969
		attr->config2 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
970
		CHECK_TYPE_VAL(NUM);
971
		break;
972 973 974
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
		CHECK_TYPE_VAL(NUM);
		break;
975 976 977 978 979 980
	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
981 982 983 984 985 986 987 988
	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;
989 990 991 992 993 994
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
		CHECK_TYPE_VAL(STR);
		break;
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
		CHECK_TYPE_VAL(NUM);
		break;
995 996 997 998 999 1000
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
		CHECK_TYPE_VAL(NUM);
		break;
W
Wang Nan 已提交
1001 1002 1003 1004 1005 1006
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
1007 1008 1009
	case PARSE_EVENTS__TERM_TYPE_NAME:
		CHECK_TYPE_VAL(STR);
		break;
1010 1011 1012
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
		CHECK_TYPE_VAL(NUM);
		break;
1013
	default:
1014 1015 1016
		err->str = strdup("unknown term");
		err->idx = term->err_term;
		err->help = parse_events_formats_error_string(NULL);
1017 1018
		return -EINVAL;
	}
1019

1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
	/*
	 * Check term availbility after basic checking so
	 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
	 *
	 * If check availbility at the entry of this function,
	 * user will see "'<sysfs term>' is not usable in 'perf stat'"
	 * if an invalid config term is provided for legacy events
	 * (for example, instructions/badterm/...), which is confusing.
	 */
	if (!config_term_avail(term->type_term, err))
		return -EINVAL;
1031
	return 0;
1032
#undef CHECK_TYPE_VAL
1033 1034
}

1035 1036 1037 1038
static int config_term_pmu(struct perf_event_attr *attr,
			   struct parse_events_term *term,
			   struct parse_events_error *err)
{
1039 1040
	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1041 1042 1043 1044 1045 1046 1047 1048 1049
		/*
		 * Always succeed for sysfs terms, as we dont know
		 * at this point what type they need to have.
		 */
		return 0;
	else
		return config_term_common(attr, term, err);
}

1050 1051 1052 1053 1054 1055 1056
static int config_term_tracepoint(struct perf_event_attr *attr,
				  struct parse_events_term *term,
				  struct parse_events_error *err)
{
	switch (term->type_term) {
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1057 1058
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1059
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
W
Wang Nan 已提交
1060 1061
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
		return config_term_common(attr, term, err);
	default:
		if (err) {
			err->idx = term->err_term;
			err->str = strdup("unknown term");
			err->help = strdup("valid terms: call-graph,stack-size\n");
		}
		return -EINVAL;
	}

	return 0;
}

1075
static int config_attr(struct perf_event_attr *attr,
1076
		       struct list_head *head,
1077 1078
		       struct parse_events_error *err,
		       config_term_func_t config_term)
1079
{
1080
	struct parse_events_term *term;
1081 1082

	list_for_each_entry(term, head, list)
1083
		if (config_term(attr, term, err))
1084 1085 1086 1087 1088
			return -EINVAL;

	return 0;
}

1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
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) {
1110 1111
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
K
Kan Liang 已提交
1112
			break;
1113 1114 1115
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
			break;
K
Kan Liang 已提交
1116 1117 1118
		case PARSE_EVENTS__TERM_TYPE_TIME:
			ADD_CONFIG_TERM(TIME, time, term->val.num);
			break;
1119 1120 1121 1122 1123 1124
		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;
1125 1126 1127 1128 1129 1130
		case PARSE_EVENTS__TERM_TYPE_INHERIT:
			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
			break;
		case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
			break;
1131 1132 1133
		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
			break;
W
Wang Nan 已提交
1134 1135 1136 1137 1138 1139
		case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
			break;
		case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
			break;
1140 1141 1142
		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
			break;
1143 1144 1145 1146 1147 1148 1149 1150
		default:
			break;
		}
	}
#undef ADD_EVSEL_CONFIG
	return 0;
}

1151
int parse_events_add_tracepoint(struct list_head *list, int *idx,
1152
				const char *sys, const char *event,
1153
				struct parse_events_error *err,
1154 1155 1156 1157 1158
				struct list_head *head_config)
{
	if (head_config) {
		struct perf_event_attr attr;

1159
		if (config_attr(&attr, head_config, err,
1160 1161 1162 1163 1164 1165
				config_term_tracepoint))
			return -EINVAL;
	}

	if (strpbrk(sys, "*?"))
		return add_tracepoint_multi_sys(list, idx, sys, event,
1166
						err, head_config);
1167 1168
	else
		return add_tracepoint_event(list, idx, sys, event,
1169
					    err, head_config);
1170 1171
}

1172 1173
int parse_events_add_numeric(struct parse_events_evlist *data,
			     struct list_head *list,
1174
			     u32 type, u64 config,
1175
			     struct list_head *head_config)
1176
{
1177
	struct perf_event_attr attr;
1178
	LIST_HEAD(config_terms);
1179

1180 1181 1182
	memset(&attr, 0, sizeof(attr));
	attr.type = type;
	attr.config = config;
1183

1184
	if (head_config) {
1185 1186
		if (config_attr(&attr, head_config, data->error,
				config_term_common))
1187 1188 1189 1190 1191
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
1192

1193 1194
	return add_event(list, &data->idx, &attr,
			 get_config_name(head_config), &config_terms);
1195
}
1196

1197 1198 1199
int parse_events_add_pmu(struct parse_events_evlist *data,
			 struct list_head *list, char *name,
			 struct list_head *head_config)
1200 1201
{
	struct perf_event_attr attr;
1202
	struct perf_pmu_info info;
1203
	struct perf_pmu *pmu;
1204
	struct perf_evsel *evsel;
1205
	LIST_HEAD(config_terms);
1206 1207 1208 1209 1210

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

1211 1212 1213 1214 1215 1216
	if (pmu->default_config) {
		memcpy(&attr, pmu->default_config,
		       sizeof(struct perf_event_attr));
	} else {
		memset(&attr, 0, sizeof(attr));
	}
1217

1218 1219
	if (!head_config) {
		attr.type = pmu->type;
1220
		evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1221 1222 1223
		return evsel ? 0 : -ENOMEM;
	}

1224
	if (perf_pmu__check_alias(pmu, head_config, &info))
1225 1226
		return -EINVAL;

1227 1228 1229 1230
	/*
	 * Configure hardcoded terms first, no need to check
	 * return value when called with fail == 0 ;)
	 */
1231
	if (config_attr(&attr, head_config, data->error, config_term_pmu))
1232
		return -EINVAL;
1233

1234 1235 1236
	if (get_config_terms(head_config, &config_terms))
		return -ENOMEM;

1237
	if (perf_pmu__config(pmu, &attr, head_config, data->error))
1238 1239
		return -EINVAL;

1240
	evsel = __add_event(list, &data->idx, &attr,
1241
			    get_config_name(head_config), pmu->cpus,
1242
			    &config_terms);
1243
	if (evsel) {
1244 1245
		evsel->unit = info.unit;
		evsel->scale = info.scale;
1246
		evsel->per_pkg = info.per_pkg;
1247
		evsel->snapshot = info.snapshot;
1248 1249 1250
	}

	return evsel ? 0 : -ENOMEM;
1251 1252
}

1253 1254
int parse_events__modifier_group(struct list_head *list,
				 char *event_mod)
1255
{
1256 1257 1258
	return parse_events__modifier_event(list, event_mod, true);
}

1259
void parse_events__set_leader(char *name, struct list_head *list)
1260 1261 1262
{
	struct perf_evsel *leader;

1263 1264 1265 1266 1267
	if (list_empty(list)) {
		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
		return;
	}

1268 1269
	__perf_evlist__set_leader(list);
	leader = list_entry(list->next, struct perf_evsel, node);
1270
	leader->group_name = name ? strdup(name) : NULL;
1271 1272
}

1273
/* list_event is assumed to point to malloc'ed memory */
1274 1275 1276 1277 1278
void parse_events_update_lists(struct list_head *list_event,
			       struct list_head *list_all)
{
	/*
	 * Called for single event definition. Update the
1279
	 * 'all event' list, and reinit the 'single event'
1280 1281 1282
	 * list, for next event definition.
	 */
	list_splice_tail(list_event, list_all);
1283
	free(list_event);
1284 1285
}

1286 1287 1288 1289 1290 1291
struct event_modifier {
	int eu;
	int ek;
	int eh;
	int eH;
	int eG;
1292
	int eI;
1293
	int precise;
1294
	int precise_max;
1295
	int exclude_GH;
1296
	int sample_read;
1297
	int pinned;
1298 1299 1300 1301
};

static int get_event_modifier(struct event_modifier *mod, char *str,
			       struct perf_evsel *evsel)
1302
{
1303 1304 1305 1306 1307
	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;
1308
	int eI = evsel ? evsel->attr.exclude_idle : 0;
1309
	int precise = evsel ? evsel->attr.precise_ip : 0;
1310
	int precise_max = 0;
1311
	int sample_read = 0;
1312
	int pinned = evsel ? evsel->attr.pinned : 0;
1313

1314 1315 1316 1317
	int exclude = eu | ek | eh;
	int exclude_GH = evsel ? evsel->exclude_GH : 0;

	memset(mod, 0, sizeof(*mod));
1318

1319
	while (*str) {
P
Peter Zijlstra 已提交
1320 1321 1322
		if (*str == 'u') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1323
			eu = 0;
P
Peter Zijlstra 已提交
1324 1325 1326
		} else if (*str == 'k') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1327
			ek = 0;
P
Peter Zijlstra 已提交
1328 1329 1330
		} else if (*str == 'h') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1331
			eh = 0;
1332 1333 1334 1335 1336 1337 1338 1339
		} 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;
1340 1341
		} else if (*str == 'I') {
			eI = 1;
P
Peter Zijlstra 已提交
1342 1343
		} else if (*str == 'p') {
			precise++;
1344 1345 1346
			/* use of precise requires exclude_guest */
			if (!exclude_GH)
				eG = 1;
1347 1348
		} else if (*str == 'P') {
			precise_max = 1;
1349 1350
		} else if (*str == 'S') {
			sample_read = 1;
1351 1352
		} else if (*str == 'D') {
			pinned = 1;
P
Peter Zijlstra 已提交
1353
		} else
1354
			break;
P
Peter Zijlstra 已提交
1355

1356
		++str;
1357
	}
1358

1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370
	/*
	 * 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;
1371

1372 1373 1374 1375 1376
	mod->eu = eu;
	mod->ek = ek;
	mod->eh = eh;
	mod->eH = eH;
	mod->eG = eG;
1377
	mod->eI = eI;
1378
	mod->precise = precise;
1379
	mod->precise_max = precise_max;
1380
	mod->exclude_GH = exclude_GH;
1381
	mod->sample_read = sample_read;
1382 1383
	mod->pinned = pinned;

1384 1385 1386
	return 0;
}

1387 1388 1389 1390 1391 1392 1393 1394 1395
/*
 * 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. */
1396
	if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
		return -1;

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

	return 0;
}

1408 1409 1410 1411 1412 1413 1414 1415
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;

1416 1417 1418
	if (check_modifier(str))
		return -EINVAL;

1419 1420 1421
	if (!add && get_event_modifier(&mod, str, NULL))
		return -EINVAL;

1422
	__evlist__for_each_entry(list, evsel) {
1423 1424 1425 1426 1427 1428 1429 1430 1431
		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;
1432
		evsel->attr.exclude_idle   = mod.eI;
1433
		evsel->exclude_GH          = mod.exclude_GH;
1434
		evsel->sample_read         = mod.sample_read;
1435
		evsel->precise_max         = mod.precise_max;
1436 1437 1438

		if (perf_evsel__is_group_leader(evsel))
			evsel->attr.pinned = mod.pinned;
1439
	}
1440

1441 1442
	return 0;
}
1443

1444 1445 1446 1447
int parse_events_name(struct list_head *list, char *name)
{
	struct perf_evsel *evsel;

1448
	__evlist__for_each_entry(list, evsel) {
1449 1450 1451 1452 1453 1454 1455
		if (!evsel->name)
			evsel->name = strdup(name);
	}

	return 0;
}

1456 1457 1458 1459 1460 1461
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;

1462
	return strcasecmp(pmu1->symbol, pmu2->symbol);
1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562
}

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;
}

1563
static int parse_events__scanner(const char *str, void *data, int start_token)
1564
{
1565
	YY_BUFFER_STATE buffer;
1566
	void *scanner;
1567
	int ret;
1568

1569
	ret = parse_events_lex_init_extra(start_token, &scanner);
1570 1571 1572 1573
	if (ret)
		return ret;

	buffer = parse_events__scan_string(str, scanner);
1574

1575 1576 1577
#ifdef PARSER_DEBUG
	parse_events_debug = 1;
#endif
1578 1579 1580 1581 1582 1583 1584
	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;
}
1585

1586 1587 1588 1589 1590
/*
 * parse event config string, return a list of event terms.
 */
int parse_events_terms(struct list_head *terms, const char *str)
{
1591
	struct parse_events_terms data = {
1592 1593 1594 1595 1596 1597 1598
		.terms = NULL,
	};
	int ret;

	ret = parse_events__scanner(str, &data, PE_START_TERMS);
	if (!ret) {
		list_splice(data.terms, terms);
1599
		zfree(&data.terms);
1600 1601 1602
		return 0;
	}

1603
	parse_events_terms__delete(data.terms);
1604 1605 1606
	return ret;
}

1607 1608
int parse_events(struct perf_evlist *evlist, const char *str,
		 struct parse_events_error *err)
1609
{
1610
	struct parse_events_evlist data = {
1611 1612 1613 1614
		.list   = LIST_HEAD_INIT(data.list),
		.idx    = evlist->nr_entries,
		.error  = err,
		.evlist = evlist,
1615 1616
	};
	int ret;
1617

1618
	ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1619
	perf_pmu__parse_cleanup();
1620
	if (!ret) {
1621 1622
		struct perf_evsel *last;

1623 1624 1625 1626 1627
		if (list_empty(&data.list)) {
			WARN_ONCE(true, "WARNING: event parser found nothing");
			return -1;
		}

1628
		perf_evlist__splice_list_tail(evlist, &data.list);
1629
		evlist->nr_groups += data.nr_groups;
1630 1631 1632
		last = perf_evlist__last(evlist);
		last->cmdline_group_boundary = true;

1633 1634
		return 0;
	}
1635

1636 1637 1638 1639 1640
	/*
	 * 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.
	 */
1641
	return ret;
1642 1643
}

1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670
#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.
		 */
1671
		int max_err_idx = 13;
1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682

		/*
		 * 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;

1683
		/* We're cutting from the beginning. */
1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714
		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

1715
int parse_events_option(const struct option *opt, const char *str,
1716
			int unset __maybe_unused)
1717 1718
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1719 1720 1721 1722 1723
	struct parse_events_error err = { .idx = 0, };
	int ret = parse_events(evlist, str, &err);

	if (ret)
		parse_events_print_error(&err, str);
1724 1725

	return ret;
1726 1727
}

1728 1729 1730 1731 1732
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
1733
{
1734
	struct perf_evsel *last = NULL;
1735
	int err;
L
Li Zefan 已提交
1736

1737 1738 1739 1740 1741 1742
	/*
	 * Don't return when list_empty, give func a chance to report
	 * error when it found last == NULL.
	 *
	 * So no need to WARN here, let *func do this.
	 */
1743
	if (evlist->nr_entries > 0)
1744
		last = perf_evlist__last(evlist);
1745

1746
	do {
1747 1748
		err = (*func)(last, arg);
		if (err)
1749
			return -1;
1750 1751
		if (!last)
			return 0;
1752 1753 1754 1755 1756

		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
1757 1758 1759 1760

	return 0;
}

1761 1762 1763
static int set_filter(struct perf_evsel *evsel, const void *arg)
{
	const char *str = arg;
1764 1765 1766
	bool found = false;
	int nr_addr_filters = 0;
	struct perf_pmu *pmu = NULL;
1767

1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778
	if (evsel == NULL)
		goto err;

	if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
		if (perf_evsel__append_tp_filter(evsel, str) < 0) {
			fprintf(stderr,
				"not enough memory to hold filter string\n");
			return -1;
		}

		return 0;
1779 1780
	}

1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794
	while ((pmu = perf_pmu__scan(pmu)) != NULL)
		if (pmu->type == evsel->attr.type) {
			found = true;
			break;
		}

	if (found)
		perf_pmu__scan_file(pmu, "nr_addr_filters",
				    "%d", &nr_addr_filters);

	if (!nr_addr_filters)
		goto err;

	if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1795 1796 1797 1798 1799 1800
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
1801 1802 1803 1804 1805 1806

err:
	fprintf(stderr,
		"--filter option should follow a -e tracepoint or HW tracer option\n");

	return -1;
1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830
}

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());

1831
	if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849
		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);
}

1850 1851 1852 1853 1854
static const char * const event_type_descriptors[] = {
	"Hardware event",
	"Software event",
	"Tracepoint event",
	"Hardware cache event",
1855 1856
	"Raw hardware event descriptor",
	"Hardware breakpoint",
1857 1858
};

1859 1860 1861 1862 1863 1864 1865 1866
static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;

	return strcmp(*as, *bs);
}

1867 1868 1869 1870
/*
 * Print the events from <debugfs_mount_point>/tracing/events
 */

1871 1872
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
			     bool name_only)
1873 1874
{
	DIR *sys_dir, *evt_dir;
1875
	struct dirent *sys_dirent, *evt_dirent;
1876
	char evt_path[MAXPATHLEN];
E
Eric Dumazet 已提交
1877
	char dir_path[MAXPATHLEN];
1878 1879 1880
	char **evt_list = NULL;
	unsigned int evt_i = 0, evt_num = 0;
	bool evt_num_known = false;
1881

1882
restart:
1883
	sys_dir = opendir(tracing_events_path);
1884
	if (!sys_dir)
E
Eric Dumazet 已提交
1885
		return;
1886

1887 1888 1889 1890 1891 1892
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_close_sys_dir;
	}

1893
	for_each_subsystem(sys_dir, sys_dirent) {
1894
		if (subsys_glob != NULL &&
1895
		    !strglobmatch(sys_dirent->d_name, subsys_glob))
1896
			continue;
E
Eric Dumazet 已提交
1897

1898
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1899
			 sys_dirent->d_name);
E
Eric Dumazet 已提交
1900 1901
		evt_dir = opendir(dir_path);
		if (!evt_dir)
1902
			continue;
E
Eric Dumazet 已提交
1903

1904
		for_each_event(sys_dirent, evt_dir, evt_dirent) {
1905
			if (event_glob != NULL &&
1906
			    !strglobmatch(evt_dirent->d_name, event_glob))
1907 1908
				continue;

1909 1910
			if (!evt_num_known) {
				evt_num++;
1911 1912 1913
				continue;
			}

1914
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
1915
				 sys_dirent->d_name, evt_dirent->d_name);
1916 1917 1918 1919 1920

			evt_list[evt_i] = strdup(evt_path);
			if (evt_list[evt_i] == NULL)
				goto out_close_evt_dir;
			evt_i++;
1921 1922 1923 1924
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939

	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]);
	}
1940
	if (evt_num && pager_in_use())
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958
		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;
1959 1960
}

1961 1962 1963 1964 1965 1966 1967
/*
 * Check whether event is in <debugfs_mount_point>/tracing/events
 */

int is_valid_tracepoint(const char *event_string)
{
	DIR *sys_dir, *evt_dir;
1968
	struct dirent *sys_dirent, *evt_dirent;
1969 1970 1971
	char evt_path[MAXPATHLEN];
	char dir_path[MAXPATHLEN];

1972
	sys_dir = opendir(tracing_events_path);
1973 1974 1975
	if (!sys_dir)
		return 0;

1976
	for_each_subsystem(sys_dir, sys_dirent) {
1977

1978
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1979
			 sys_dirent->d_name);
1980 1981 1982 1983
		evt_dir = opendir(dir_path);
		if (!evt_dir)
			continue;

1984
		for_each_event(sys_dirent, evt_dir, evt_dirent) {
1985
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
1986
				 sys_dirent->d_name, evt_dirent->d_name);
1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998
			if (!strcmp(evt_path, event_string)) {
				closedir(evt_dir);
				closedir(sys_dir);
				return 1;
			}
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
	return 0;
}

1999 2000 2001
static bool is_event_supported(u8 type, unsigned config)
{
	bool ret = true;
2002
	int open_return;
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
	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 },
	};

2017
	evsel = perf_evsel__new(&attr);
2018
	if (evsel) {
2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032
		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;
		}
2033 2034 2035 2036 2037 2038
		perf_evsel__delete(evsel);
	}

	return ret;
}

2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117
void print_sdt_events(const char *subsys_glob, const char *event_glob,
		      bool name_only)
{
	struct probe_cache *pcache;
	struct probe_cache_entry *ent;
	struct strlist *bidlist, *sdtlist;
	struct strlist_config cfg = {.dont_dupstr = true};
	struct str_node *nd, *nd2;
	char *buf, *path, *ptr = NULL;
	bool show_detail = false;
	int ret;

	sdtlist = strlist__new(NULL, &cfg);
	if (!sdtlist) {
		pr_debug("Failed to allocate new strlist for SDT\n");
		return;
	}
	bidlist = build_id_cache__list_all(true);
	if (!bidlist) {
		pr_debug("Failed to get buildids: %d\n", errno);
		return;
	}
	strlist__for_each_entry(nd, bidlist) {
		pcache = probe_cache__new(nd->s);
		if (!pcache)
			continue;
		list_for_each_entry(ent, &pcache->entries, node) {
			if (!ent->sdt)
				continue;
			if (subsys_glob &&
			    !strglobmatch(ent->pev.group, subsys_glob))
				continue;
			if (event_glob &&
			    !strglobmatch(ent->pev.event, event_glob))
				continue;
			ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
					ent->pev.event, nd->s);
			if (ret > 0)
				strlist__add(sdtlist, buf);
		}
		probe_cache__delete(pcache);
	}
	strlist__delete(bidlist);

	strlist__for_each_entry(nd, sdtlist) {
		buf = strchr(nd->s, '@');
		if (buf)
			*(buf++) = '\0';
		if (name_only) {
			printf("%s ", nd->s);
			continue;
		}
		nd2 = strlist__next(nd);
		if (nd2) {
			ptr = strchr(nd2->s, '@');
			if (ptr)
				*ptr = '\0';
			if (strcmp(nd->s, nd2->s) == 0)
				show_detail = true;
		}
		if (show_detail) {
			path = build_id_cache__origname(buf);
			ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
			if (ret > 0) {
				printf("  %-50s [%s]\n", buf, "SDT event");
				free(buf);
			}
		} else
			printf("  %-50s [%s]\n", nd->s, "SDT event");
		if (nd2) {
			if (strcmp(nd->s, nd2->s) != 0)
				show_detail = false;
			if (ptr)
				*ptr = '@';
		}
	}
	strlist__delete(sdtlist);
}

2118
int print_hwcache_events(const char *event_glob, bool name_only)
2119
{
2120
	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2121
	char name[64];
2122 2123 2124 2125 2126 2127 2128 2129 2130
	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;
	}
2131 2132 2133 2134

	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 */
2135
			if (!perf_evsel__is_cache_op_valid(type, op))
2136 2137 2138
				continue;

			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2139 2140
				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
									name, sizeof(name));
2141
				if (event_glob != NULL && !strglobmatch(name, event_glob))
2142 2143
					continue;

2144 2145 2146 2147
				if (!is_event_supported(PERF_TYPE_HW_CACHE,
							type | (op << 8) | (i << 16)))
					continue;

2148 2149 2150 2151 2152 2153 2154 2155 2156
				if (!evt_num_known) {
					evt_num++;
					continue;
				}

				evt_list[evt_i] = strdup(name);
				if (evt_list[evt_i] == NULL)
					goto out_enomem;
				evt_i++;
2157 2158 2159 2160
			}
		}
	}

2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174
	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]);
	}
2175
	if (evt_num && pager_in_use())
2176
		printf("\n");
2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189

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;
2190 2191
}

2192
void print_symbol_events(const char *event_glob, unsigned type,
2193 2194
				struct event_symbol *syms, unsigned max,
				bool name_only)
2195
{
2196
	unsigned int i, evt_i = 0, evt_num = 0;
2197
	char name[MAX_NAME_LEN];
2198 2199 2200 2201 2202 2203 2204 2205 2206 2207
	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;
	}
2208

2209
	for (i = 0; i < max; i++, syms++) {
2210

2211
		if (event_glob != NULL && syms->symbol != NULL &&
2212 2213 2214
		    !(strglobmatch(syms->symbol, event_glob) ||
		      (syms->alias && strglobmatch(syms->alias, event_glob))))
			continue;
2215

2216 2217 2218
		if (!is_event_supported(type, i))
			continue;

2219 2220
		if (!evt_num_known) {
			evt_num++;
2221 2222 2223
			continue;
		}

2224
		if (!name_only && strlen(syms->alias))
2225
			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2226
		else
2227
			strncpy(name, syms->symbol, MAX_NAME_LEN);
2228

2229 2230 2231 2232
		evt_list[evt_i] = strdup(name);
		if (evt_list[evt_i] == NULL)
			goto out_enomem;
		evt_i++;
2233 2234
	}

2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247
	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]);
	}
2248
	if (evt_num && pager_in_use())
2249
		printf("\n");
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261

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;
2262 2263 2264 2265 2266
}

/*
 * Print the help text for the event symbols:
 */
2267 2268
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
			bool long_desc)
2269 2270
{
	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2271
			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2272 2273

	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2274
			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2275

2276
	print_hwcache_events(event_glob, name_only);
2277

2278
	print_pmu_events(event_glob, name_only, quiet_flag, long_desc);
2279

2280 2281
	if (event_glob != NULL)
		return;
2282

2283 2284 2285 2286 2287 2288 2289
	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]);
2290 2291
		if (pager_in_use())
			printf("   (see 'man perf-list' on how to encode it)\n\n");
2292 2293

		printf("  %-50s [%s]\n",
2294
		       "mem:<addr>[/len][:access]",
2295
			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2296 2297
		if (pager_in_use())
			printf("\n");
2298
	}
2299

2300
	print_tracepoint_events(NULL, NULL, name_only);
2301 2302

	print_sdt_events(NULL, NULL, name_only);
2303
}
2304

2305
int parse_events__is_hardcoded_term(struct parse_events_term *term)
2306
{
2307
	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2308 2309
}

2310
static int new_term(struct parse_events_term **_term, int type_val,
2311
		    int type_term, char *config,
2312
		    char *str, u64 num, int err_term, int err_val)
2313
{
2314
	struct parse_events_term *term;
2315 2316 2317 2318 2319 2320

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

	INIT_LIST_HEAD(&term->list);
2321 2322
	term->type_val  = type_val;
	term->type_term = type_term;
2323
	term->config = config;
2324 2325
	term->err_term = err_term;
	term->err_val  = err_val;
2326

2327
	switch (type_val) {
2328 2329 2330 2331 2332 2333 2334
	case PARSE_EVENTS__TERM_TYPE_NUM:
		term->val.num = num;
		break;
	case PARSE_EVENTS__TERM_TYPE_STR:
		term->val.str = str;
		break;
	default:
2335
		free(term);
2336 2337 2338 2339 2340 2341 2342
		return -EINVAL;
	}

	*_term = term;
	return 0;
}

2343
int parse_events_term__num(struct parse_events_term **term,
2344
			   int type_term, char *config, u64 num,
2345
			   void *loc_term_, void *loc_val_)
2346
{
2347 2348 2349
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2350
	return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2351 2352 2353
			config, NULL, num,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
2354 2355
}

2356
int parse_events_term__str(struct parse_events_term **term,
2357
			   int type_term, char *config, char *str,
2358
			   void *loc_term_, void *loc_val_)
2359
{
2360 2361 2362
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2363
	return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2364 2365 2366
			config, str, 0,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
2367 2368
}

2369
int parse_events_term__sym_hw(struct parse_events_term **term,
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379
			      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,
2380
				(char *) sym->symbol, 0, 0, 0);
2381 2382 2383
	else
		return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
				PARSE_EVENTS__TERM_TYPE_USER,
2384 2385
				(char *) "event", (char *) sym->symbol,
				0, 0, 0);
2386 2387
}

2388 2389
int parse_events_term__clone(struct parse_events_term **new,
			     struct parse_events_term *term)
2390 2391
{
	return new_term(new, term->type_val, term->type_term, term->config,
2392 2393
			term->val.str, term->val.num,
			term->err_term, term->err_val);
2394 2395
}

2396
void parse_events_terms__purge(struct list_head *terms)
2397
{
2398
	struct parse_events_term *term, *h;
2399

2400
	list_for_each_entry_safe(term, h, terms, list) {
2401 2402
		if (term->array.nr_ranges)
			free(term->array.ranges);
2403
		list_del_init(&term->list);
2404
		free(term);
2405
	}
2406
}
2407

2408
void parse_events_terms__delete(struct list_head *terms)
2409
{
2410 2411
	if (!terms)
		return;
2412
	parse_events_terms__purge(terms);
2413
	free(terms);
2414 2415
}

2416 2417 2418 2419 2420
void parse_events__clear_array(struct parse_events_array *a)
{
	free(a->ranges);
}

2421 2422 2423 2424 2425
void parse_events_evlist_error(struct parse_events_evlist *data,
			       int idx, const char *str)
{
	struct parse_events_error *err = data->error;

2426 2427
	if (!err)
		return;
2428 2429 2430 2431
	err->idx = idx;
	err->str = strdup(str);
	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
}
2432

2433 2434 2435 2436 2437 2438 2439 2440 2441
static void config_terms_list(char *buf, size_t buf_sz)
{
	int i;
	bool first = true;

	buf[0] = '\0';
	for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
		const char *name = config_term_names[i];

2442 2443
		if (!config_term_avail(i, NULL))
			continue;
2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
		if (!name)
			continue;
		if (name[0] == '<')
			continue;

		if (strlen(buf) + strlen(name) + 2 >= buf_sz)
			return;

		if (!first)
			strcat(buf, ",");
		else
			first = false;
		strcat(buf, name);
	}
}

2460 2461 2462 2463 2464 2465 2466
/*
 * Return string contains valid config terms of an event.
 * @additional_terms: For terms such as PMU sysfs terms.
 */
char *parse_events_formats_error_string(char *additional_terms)
{
	char *str;
W
Wang Nan 已提交
2467
	/* "no-overwrite" is the longest name */
2468
	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
W
Wang Nan 已提交
2469
			  (sizeof("no-overwrite") - 1)];
2470

2471
	config_terms_list(static_terms, sizeof(static_terms));
2472 2473
	/* valid terms */
	if (additional_terms) {
2474 2475
		if (asprintf(&str, "valid terms: %s,%s",
			     additional_terms, static_terms) < 0)
2476 2477
			goto fail;
	} else {
2478
		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2479 2480 2481 2482 2483 2484 2485
			goto fail;
	}
	return str;

fail:
	return NULL;
}