parse-events.c 56.7 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",
907 908
};

909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943
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:
		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;
}

944 945 946
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err)
947
{
948 949 950 951
#define CHECK_TYPE_VAL(type)						   \
do {									   \
	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
		return -EINVAL;						   \
952 953 954
} while (0)

	switch (term->type_term) {
955
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
956
		CHECK_TYPE_VAL(NUM);
957 958 959
		attr->config = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
960
		CHECK_TYPE_VAL(NUM);
961 962 963
		attr->config1 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
964
		CHECK_TYPE_VAL(NUM);
965 966 967
		attr->config2 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
968
		CHECK_TYPE_VAL(NUM);
969
		break;
970 971 972
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
		CHECK_TYPE_VAL(NUM);
		break;
973 974 975 976 977 978
	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
979 980 981 982 983 984 985 986
	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;
987 988 989 990 991 992
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
		CHECK_TYPE_VAL(STR);
		break;
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
		CHECK_TYPE_VAL(NUM);
		break;
993 994 995 996 997 998
	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
999 1000 1001 1002 1003 1004
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
1005 1006 1007
	case PARSE_EVENTS__TERM_TYPE_NAME:
		CHECK_TYPE_VAL(STR);
		break;
1008 1009 1010
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
		CHECK_TYPE_VAL(NUM);
		break;
1011
	default:
1012 1013 1014
		err->str = strdup("unknown term");
		err->idx = term->err_term;
		err->help = parse_events_formats_error_string(NULL);
1015 1016
		return -EINVAL;
	}
1017

1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028
	/*
	 * 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;
1029
	return 0;
1030
#undef CHECK_TYPE_VAL
1031 1032
}

1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
static int config_term_pmu(struct perf_event_attr *attr,
			   struct parse_events_term *term,
			   struct parse_events_error *err)
{
	if (term->type_term == 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;
	else
		return config_term_common(attr, term, err);
}

1047 1048 1049 1050 1051 1052 1053
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:
1054 1055
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1056
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
W
Wang Nan 已提交
1057 1058
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
		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;
}

1072
static int config_attr(struct perf_event_attr *attr,
1073
		       struct list_head *head,
1074 1075
		       struct parse_events_error *err,
		       config_term_func_t config_term)
1076
{
1077
	struct parse_events_term *term;
1078 1079

	list_for_each_entry(term, head, list)
1080
		if (config_term(attr, term, err))
1081 1082 1083 1084 1085
			return -EINVAL;

	return 0;
}

1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
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) {
1107 1108
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
K
Kan Liang 已提交
1109
			break;
1110 1111 1112
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
			break;
K
Kan Liang 已提交
1113 1114 1115
		case PARSE_EVENTS__TERM_TYPE_TIME:
			ADD_CONFIG_TERM(TIME, time, term->val.num);
			break;
1116 1117 1118 1119 1120 1121
		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;
1122 1123 1124 1125 1126 1127
		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;
1128 1129 1130
		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
			break;
W
Wang Nan 已提交
1131 1132 1133 1134 1135 1136
		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;
1137 1138 1139 1140 1141 1142 1143 1144
		default:
			break;
		}
	}
#undef ADD_EVSEL_CONFIG
	return 0;
}

1145
int parse_events_add_tracepoint(struct list_head *list, int *idx,
1146
				const char *sys, const char *event,
1147
				struct parse_events_error *err,
1148 1149 1150 1151 1152
				struct list_head *head_config)
{
	if (head_config) {
		struct perf_event_attr attr;

1153
		if (config_attr(&attr, head_config, err,
1154 1155 1156 1157 1158 1159
				config_term_tracepoint))
			return -EINVAL;
	}

	if (strpbrk(sys, "*?"))
		return add_tracepoint_multi_sys(list, idx, sys, event,
1160
						err, head_config);
1161 1162
	else
		return add_tracepoint_event(list, idx, sys, event,
1163
					    err, head_config);
1164 1165
}

1166 1167
int parse_events_add_numeric(struct parse_events_evlist *data,
			     struct list_head *list,
1168
			     u32 type, u64 config,
1169
			     struct list_head *head_config)
1170
{
1171
	struct perf_event_attr attr;
1172
	LIST_HEAD(config_terms);
1173

1174 1175 1176
	memset(&attr, 0, sizeof(attr));
	attr.type = type;
	attr.config = config;
1177

1178
	if (head_config) {
1179 1180
		if (config_attr(&attr, head_config, data->error,
				config_term_common))
1181 1182 1183 1184 1185
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
1186

1187 1188
	return add_event(list, &data->idx, &attr,
			 get_config_name(head_config), &config_terms);
1189
}
1190

1191 1192 1193
int parse_events_add_pmu(struct parse_events_evlist *data,
			 struct list_head *list, char *name,
			 struct list_head *head_config)
1194 1195
{
	struct perf_event_attr attr;
1196
	struct perf_pmu_info info;
1197
	struct perf_pmu *pmu;
1198
	struct perf_evsel *evsel;
1199
	LIST_HEAD(config_terms);
1200 1201 1202 1203 1204

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

1205 1206 1207 1208 1209 1210
	if (pmu->default_config) {
		memcpy(&attr, pmu->default_config,
		       sizeof(struct perf_event_attr));
	} else {
		memset(&attr, 0, sizeof(attr));
	}
1211

1212 1213
	if (!head_config) {
		attr.type = pmu->type;
1214
		evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1215 1216 1217
		return evsel ? 0 : -ENOMEM;
	}

1218
	if (perf_pmu__check_alias(pmu, head_config, &info))
1219 1220
		return -EINVAL;

1221 1222 1223 1224
	/*
	 * Configure hardcoded terms first, no need to check
	 * return value when called with fail == 0 ;)
	 */
1225
	if (config_attr(&attr, head_config, data->error, config_term_pmu))
1226
		return -EINVAL;
1227

1228 1229 1230
	if (get_config_terms(head_config, &config_terms))
		return -ENOMEM;

1231
	if (perf_pmu__config(pmu, &attr, head_config, data->error))
1232 1233
		return -EINVAL;

1234
	evsel = __add_event(list, &data->idx, &attr,
1235
			    get_config_name(head_config), pmu->cpus,
1236
			    &config_terms);
1237
	if (evsel) {
1238 1239
		evsel->unit = info.unit;
		evsel->scale = info.scale;
1240
		evsel->per_pkg = info.per_pkg;
1241
		evsel->snapshot = info.snapshot;
1242 1243 1244
	}

	return evsel ? 0 : -ENOMEM;
1245 1246
}

1247 1248
int parse_events__modifier_group(struct list_head *list,
				 char *event_mod)
1249
{
1250 1251 1252
	return parse_events__modifier_event(list, event_mod, true);
}

1253
void parse_events__set_leader(char *name, struct list_head *list)
1254 1255 1256
{
	struct perf_evsel *leader;

1257 1258 1259 1260 1261
	if (list_empty(list)) {
		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
		return;
	}

1262 1263
	__perf_evlist__set_leader(list);
	leader = list_entry(list->next, struct perf_evsel, node);
1264
	leader->group_name = name ? strdup(name) : NULL;
1265 1266
}

1267
/* list_event is assumed to point to malloc'ed memory */
1268 1269 1270 1271 1272
void parse_events_update_lists(struct list_head *list_event,
			       struct list_head *list_all)
{
	/*
	 * Called for single event definition. Update the
1273
	 * 'all event' list, and reinit the 'single event'
1274 1275 1276
	 * list, for next event definition.
	 */
	list_splice_tail(list_event, list_all);
1277
	free(list_event);
1278 1279
}

1280 1281 1282 1283 1284 1285
struct event_modifier {
	int eu;
	int ek;
	int eh;
	int eH;
	int eG;
1286
	int eI;
1287
	int precise;
1288
	int precise_max;
1289
	int exclude_GH;
1290
	int sample_read;
1291
	int pinned;
1292 1293 1294 1295
};

static int get_event_modifier(struct event_modifier *mod, char *str,
			       struct perf_evsel *evsel)
1296
{
1297 1298 1299 1300 1301
	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;
1302
	int eI = evsel ? evsel->attr.exclude_idle : 0;
1303
	int precise = evsel ? evsel->attr.precise_ip : 0;
1304
	int precise_max = 0;
1305
	int sample_read = 0;
1306
	int pinned = evsel ? evsel->attr.pinned : 0;
1307

1308 1309 1310 1311
	int exclude = eu | ek | eh;
	int exclude_GH = evsel ? evsel->exclude_GH : 0;

	memset(mod, 0, sizeof(*mod));
1312

1313
	while (*str) {
P
Peter Zijlstra 已提交
1314 1315 1316
		if (*str == 'u') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1317
			eu = 0;
P
Peter Zijlstra 已提交
1318 1319 1320
		} else if (*str == 'k') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1321
			ek = 0;
P
Peter Zijlstra 已提交
1322 1323 1324
		} else if (*str == 'h') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1325
			eh = 0;
1326 1327 1328 1329 1330 1331 1332 1333
		} 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;
1334 1335
		} else if (*str == 'I') {
			eI = 1;
P
Peter Zijlstra 已提交
1336 1337
		} else if (*str == 'p') {
			precise++;
1338 1339 1340
			/* use of precise requires exclude_guest */
			if (!exclude_GH)
				eG = 1;
1341 1342
		} else if (*str == 'P') {
			precise_max = 1;
1343 1344
		} else if (*str == 'S') {
			sample_read = 1;
1345 1346
		} else if (*str == 'D') {
			pinned = 1;
P
Peter Zijlstra 已提交
1347
		} else
1348
			break;
P
Peter Zijlstra 已提交
1349

1350
		++str;
1351
	}
1352

1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364
	/*
	 * 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;
1365

1366 1367 1368 1369 1370
	mod->eu = eu;
	mod->ek = ek;
	mod->eh = eh;
	mod->eH = eH;
	mod->eG = eG;
1371
	mod->eI = eI;
1372
	mod->precise = precise;
1373
	mod->precise_max = precise_max;
1374
	mod->exclude_GH = exclude_GH;
1375
	mod->sample_read = sample_read;
1376 1377
	mod->pinned = pinned;

1378 1379 1380
	return 0;
}

1381 1382 1383 1384 1385 1386 1387 1388 1389
/*
 * 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. */
1390
	if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401
		return -1;

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

	return 0;
}

1402 1403 1404 1405 1406 1407 1408 1409
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;

1410 1411 1412
	if (check_modifier(str))
		return -EINVAL;

1413 1414 1415
	if (!add && get_event_modifier(&mod, str, NULL))
		return -EINVAL;

1416
	__evlist__for_each_entry(list, evsel) {
1417 1418 1419 1420 1421 1422 1423 1424 1425
		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;
1426
		evsel->attr.exclude_idle   = mod.eI;
1427
		evsel->exclude_GH          = mod.exclude_GH;
1428
		evsel->sample_read         = mod.sample_read;
1429
		evsel->precise_max         = mod.precise_max;
1430 1431 1432

		if (perf_evsel__is_group_leader(evsel))
			evsel->attr.pinned = mod.pinned;
1433
	}
1434

1435 1436
	return 0;
}
1437

1438 1439 1440 1441
int parse_events_name(struct list_head *list, char *name)
{
	struct perf_evsel *evsel;

1442
	__evlist__for_each_entry(list, evsel) {
1443 1444 1445 1446 1447 1448 1449
		if (!evsel->name)
			evsel->name = strdup(name);
	}

	return 0;
}

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 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
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;
}

1557
static int parse_events__scanner(const char *str, void *data, int start_token)
1558
{
1559
	YY_BUFFER_STATE buffer;
1560
	void *scanner;
1561
	int ret;
1562

1563
	ret = parse_events_lex_init_extra(start_token, &scanner);
1564 1565 1566 1567
	if (ret)
		return ret;

	buffer = parse_events__scan_string(str, scanner);
1568

1569 1570 1571
#ifdef PARSER_DEBUG
	parse_events_debug = 1;
#endif
1572 1573 1574 1575 1576 1577 1578
	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;
}
1579

1580 1581 1582 1583 1584
/*
 * parse event config string, return a list of event terms.
 */
int parse_events_terms(struct list_head *terms, const char *str)
{
1585
	struct parse_events_terms data = {
1586 1587 1588 1589 1590 1591 1592
		.terms = NULL,
	};
	int ret;

	ret = parse_events__scanner(str, &data, PE_START_TERMS);
	if (!ret) {
		list_splice(data.terms, terms);
1593
		zfree(&data.terms);
1594 1595 1596
		return 0;
	}

1597
	parse_events_terms__delete(data.terms);
1598 1599 1600
	return ret;
}

1601 1602
int parse_events(struct perf_evlist *evlist, const char *str,
		 struct parse_events_error *err)
1603
{
1604
	struct parse_events_evlist data = {
1605 1606 1607 1608
		.list   = LIST_HEAD_INIT(data.list),
		.idx    = evlist->nr_entries,
		.error  = err,
		.evlist = evlist,
1609 1610
	};
	int ret;
1611

1612
	ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1613
	perf_pmu__parse_cleanup();
1614
	if (!ret) {
1615 1616
		struct perf_evsel *last;

1617 1618 1619 1620 1621
		if (list_empty(&data.list)) {
			WARN_ONCE(true, "WARNING: event parser found nothing");
			return -1;
		}

1622
		perf_evlist__splice_list_tail(evlist, &data.list);
1623
		evlist->nr_groups += data.nr_groups;
1624 1625 1626
		last = perf_evlist__last(evlist);
		last->cmdline_group_boundary = true;

1627 1628
		return 0;
	}
1629

1630 1631 1632 1633 1634
	/*
	 * 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.
	 */
1635
	return ret;
1636 1637
}

1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
#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.
		 */
1665
		int max_err_idx = 13;
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676

		/*
		 * 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;

1677
		/* We're cutting from the beginning. */
1678 1679 1680 1681 1682 1683 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
		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

1709
int parse_events_option(const struct option *opt, const char *str,
1710
			int unset __maybe_unused)
1711 1712
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1713 1714 1715 1716 1717
	struct parse_events_error err = { .idx = 0, };
	int ret = parse_events(evlist, str, &err);

	if (ret)
		parse_events_print_error(&err, str);
1718 1719

	return ret;
1720 1721
}

1722 1723 1724 1725 1726
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
1727
{
1728
	struct perf_evsel *last = NULL;
1729
	int err;
L
Li Zefan 已提交
1730

1731 1732 1733 1734 1735 1736
	/*
	 * 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.
	 */
1737
	if (evlist->nr_entries > 0)
1738
		last = perf_evlist__last(evlist);
1739

1740
	do {
1741 1742
		err = (*func)(last, arg);
		if (err)
1743
			return -1;
1744 1745
		if (!last)
			return 0;
1746 1747 1748 1749 1750

		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
1751 1752 1753 1754

	return 0;
}

1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
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);
}

1815 1816 1817 1818 1819
static const char * const event_type_descriptors[] = {
	"Hardware event",
	"Software event",
	"Tracepoint event",
	"Hardware cache event",
1820 1821
	"Raw hardware event descriptor",
	"Hardware breakpoint",
1822 1823
};

1824 1825 1826 1827 1828 1829 1830 1831
static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;

	return strcmp(*as, *bs);
}

1832 1833 1834 1835
/*
 * Print the events from <debugfs_mount_point>/tracing/events
 */

1836 1837
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
			     bool name_only)
1838 1839
{
	DIR *sys_dir, *evt_dir;
1840
	struct dirent *sys_dirent, *evt_dirent;
1841
	char evt_path[MAXPATHLEN];
E
Eric Dumazet 已提交
1842
	char dir_path[MAXPATHLEN];
1843 1844 1845
	char **evt_list = NULL;
	unsigned int evt_i = 0, evt_num = 0;
	bool evt_num_known = false;
1846

1847
restart:
1848
	sys_dir = opendir(tracing_events_path);
1849
	if (!sys_dir)
E
Eric Dumazet 已提交
1850
		return;
1851

1852 1853 1854 1855 1856 1857
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_close_sys_dir;
	}

1858
	for_each_subsystem(sys_dir, sys_dirent) {
1859
		if (subsys_glob != NULL &&
1860
		    !strglobmatch(sys_dirent->d_name, subsys_glob))
1861
			continue;
E
Eric Dumazet 已提交
1862

1863
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1864
			 sys_dirent->d_name);
E
Eric Dumazet 已提交
1865 1866
		evt_dir = opendir(dir_path);
		if (!evt_dir)
1867
			continue;
E
Eric Dumazet 已提交
1868

1869
		for_each_event(sys_dirent, evt_dir, evt_dirent) {
1870
			if (event_glob != NULL &&
1871
			    !strglobmatch(evt_dirent->d_name, event_glob))
1872 1873
				continue;

1874 1875
			if (!evt_num_known) {
				evt_num++;
1876 1877 1878
				continue;
			}

1879
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
1880
				 sys_dirent->d_name, evt_dirent->d_name);
1881 1882 1883 1884 1885

			evt_list[evt_i] = strdup(evt_path);
			if (evt_list[evt_i] == NULL)
				goto out_close_evt_dir;
			evt_i++;
1886 1887 1888 1889
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904

	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]);
	}
1905
	if (evt_num && pager_in_use())
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923
		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;
1924 1925
}

1926 1927 1928 1929 1930 1931 1932
/*
 * Check whether event is in <debugfs_mount_point>/tracing/events
 */

int is_valid_tracepoint(const char *event_string)
{
	DIR *sys_dir, *evt_dir;
1933
	struct dirent *sys_dirent, *evt_dirent;
1934 1935 1936
	char evt_path[MAXPATHLEN];
	char dir_path[MAXPATHLEN];

1937
	sys_dir = opendir(tracing_events_path);
1938 1939 1940
	if (!sys_dir)
		return 0;

1941
	for_each_subsystem(sys_dir, sys_dirent) {
1942

1943
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1944
			 sys_dirent->d_name);
1945 1946 1947 1948
		evt_dir = opendir(dir_path);
		if (!evt_dir)
			continue;

1949
		for_each_event(sys_dirent, evt_dir, evt_dirent) {
1950
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
1951
				 sys_dirent->d_name, evt_dirent->d_name);
1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
			if (!strcmp(evt_path, event_string)) {
				closedir(evt_dir);
				closedir(sys_dir);
				return 1;
			}
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
	return 0;
}

1964 1965 1966
static bool is_event_supported(u8 type, unsigned config)
{
	bool ret = true;
1967
	int open_return;
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
	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 },
	};

1982
	evsel = perf_evsel__new(&attr);
1983
	if (evsel) {
1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
		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;
		}
1998 1999 2000 2001 2002 2003
		perf_evsel__delete(evsel);
	}

	return ret;
}

2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 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
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);
}

2083
int print_hwcache_events(const char *event_glob, bool name_only)
2084
{
2085
	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2086
	char name[64];
2087 2088 2089 2090 2091 2092 2093 2094 2095
	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;
	}
2096 2097 2098 2099

	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 */
2100
			if (!perf_evsel__is_cache_op_valid(type, op))
2101 2102 2103
				continue;

			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2104 2105
				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
									name, sizeof(name));
2106
				if (event_glob != NULL && !strglobmatch(name, event_glob))
2107 2108
					continue;

2109 2110 2111 2112
				if (!is_event_supported(PERF_TYPE_HW_CACHE,
							type | (op << 8) | (i << 16)))
					continue;

2113 2114 2115 2116 2117 2118 2119 2120 2121
				if (!evt_num_known) {
					evt_num++;
					continue;
				}

				evt_list[evt_i] = strdup(name);
				if (evt_list[evt_i] == NULL)
					goto out_enomem;
				evt_i++;
2122 2123 2124 2125
			}
		}
	}

2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139
	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]);
	}
2140
	if (evt_num && pager_in_use())
2141
		printf("\n");
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154

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;
2155 2156
}

2157
void print_symbol_events(const char *event_glob, unsigned type,
2158 2159
				struct event_symbol *syms, unsigned max,
				bool name_only)
2160
{
2161
	unsigned int i, evt_i = 0, evt_num = 0;
2162
	char name[MAX_NAME_LEN];
2163 2164 2165 2166 2167 2168 2169 2170 2171 2172
	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;
	}
2173

2174
	for (i = 0; i < max; i++, syms++) {
2175

2176
		if (event_glob != NULL && syms->symbol != NULL &&
2177 2178 2179
		    !(strglobmatch(syms->symbol, event_glob) ||
		      (syms->alias && strglobmatch(syms->alias, event_glob))))
			continue;
2180

2181 2182 2183
		if (!is_event_supported(type, i))
			continue;

2184 2185
		if (!evt_num_known) {
			evt_num++;
2186 2187 2188
			continue;
		}

2189
		if (!name_only && strlen(syms->alias))
2190
			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2191
		else
2192
			strncpy(name, syms->symbol, MAX_NAME_LEN);
2193

2194 2195 2196 2197
		evt_list[evt_i] = strdup(name);
		if (evt_list[evt_i] == NULL)
			goto out_enomem;
		evt_i++;
2198 2199
	}

2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212
	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]);
	}
2213
	if (evt_num && pager_in_use())
2214
		printf("\n");
2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226

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;
2227 2228 2229 2230 2231
}

/*
 * Print the help text for the event symbols:
 */
2232
void print_events(const char *event_glob, bool name_only)
2233 2234
{
	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2235
			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2236 2237

	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2238
			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2239

2240
	print_hwcache_events(event_glob, name_only);
2241

2242 2243
	print_pmu_events(event_glob, name_only);

2244 2245
	if (event_glob != NULL)
		return;
2246

2247 2248 2249 2250 2251 2252 2253
	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]);
2254 2255
		if (pager_in_use())
			printf("   (see 'man perf-list' on how to encode it)\n\n");
2256 2257

		printf("  %-50s [%s]\n",
2258
		       "mem:<addr>[/len][:access]",
2259
			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2260 2261
		if (pager_in_use())
			printf("\n");
2262
	}
2263

2264
	print_tracepoint_events(NULL, NULL, name_only);
2265 2266

	print_sdt_events(NULL, NULL, name_only);
2267
}
2268

2269
int parse_events__is_hardcoded_term(struct parse_events_term *term)
2270
{
2271
	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2272 2273
}

2274
static int new_term(struct parse_events_term **_term, int type_val,
2275
		    int type_term, char *config,
2276
		    char *str, u64 num, int err_term, int err_val)
2277
{
2278
	struct parse_events_term *term;
2279 2280 2281 2282 2283 2284

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

	INIT_LIST_HEAD(&term->list);
2285 2286
	term->type_val  = type_val;
	term->type_term = type_term;
2287
	term->config = config;
2288 2289
	term->err_term = err_term;
	term->err_val  = err_val;
2290

2291
	switch (type_val) {
2292 2293 2294 2295 2296 2297 2298
	case PARSE_EVENTS__TERM_TYPE_NUM:
		term->val.num = num;
		break;
	case PARSE_EVENTS__TERM_TYPE_STR:
		term->val.str = str;
		break;
	default:
2299
		free(term);
2300 2301 2302 2303 2304 2305 2306
		return -EINVAL;
	}

	*_term = term;
	return 0;
}

2307
int parse_events_term__num(struct parse_events_term **term,
2308
			   int type_term, char *config, u64 num,
2309
			   void *loc_term_, void *loc_val_)
2310
{
2311 2312 2313
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2314
	return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2315 2316 2317
			config, NULL, num,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
2318 2319
}

2320
int parse_events_term__str(struct parse_events_term **term,
2321
			   int type_term, char *config, char *str,
2322
			   void *loc_term_, void *loc_val_)
2323
{
2324 2325 2326
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2327
	return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2328 2329 2330
			config, str, 0,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
2331 2332
}

2333
int parse_events_term__sym_hw(struct parse_events_term **term,
2334 2335 2336 2337 2338 2339 2340 2341 2342 2343
			      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,
2344
				(char *) sym->symbol, 0, 0, 0);
2345 2346 2347
	else
		return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
				PARSE_EVENTS__TERM_TYPE_USER,
2348 2349
				(char *) "event", (char *) sym->symbol,
				0, 0, 0);
2350 2351
}

2352 2353
int parse_events_term__clone(struct parse_events_term **new,
			     struct parse_events_term *term)
2354 2355
{
	return new_term(new, term->type_val, term->type_term, term->config,
2356 2357
			term->val.str, term->val.num,
			term->err_term, term->err_val);
2358 2359
}

2360
void parse_events_terms__purge(struct list_head *terms)
2361
{
2362
	struct parse_events_term *term, *h;
2363

2364
	list_for_each_entry_safe(term, h, terms, list) {
2365 2366
		if (term->array.nr_ranges)
			free(term->array.ranges);
2367
		list_del_init(&term->list);
2368
		free(term);
2369
	}
2370
}
2371

2372
void parse_events_terms__delete(struct list_head *terms)
2373
{
2374 2375
	if (!terms)
		return;
2376
	parse_events_terms__purge(terms);
2377
	free(terms);
2378 2379
}

2380 2381 2382 2383 2384
void parse_events__clear_array(struct parse_events_array *a)
{
	free(a->ranges);
}

2385 2386 2387 2388 2389
void parse_events_evlist_error(struct parse_events_evlist *data,
			       int idx, const char *str)
{
	struct parse_events_error *err = data->error;

2390 2391
	if (!err)
		return;
2392 2393 2394 2395
	err->idx = idx;
	err->str = strdup(str);
	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
}
2396

2397 2398 2399 2400 2401 2402 2403 2404 2405
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];

2406 2407
		if (!config_term_avail(i, NULL))
			continue;
2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423
		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);
	}
}

2424 2425 2426 2427 2428 2429 2430
/*
 * 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
2431
	/* "no-overwrite" is the longest name */
2432
	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
W
Wang Nan 已提交
2433
			  (sizeof("no-overwrite") - 1)];
2434

2435
	config_terms_list(static_terms, sizeof(static_terms));
2436 2437
	/* valid terms */
	if (additional_terms) {
2438 2439
		if (asprintf(&str, "valid terms: %s,%s",
			     additional_terms, static_terms) < 0)
2440 2441
			goto fail;
	} else {
2442
		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2443 2444 2445 2446 2447 2448 2449
			goto fail;
	}
	return str;

fail:
	return NULL;
}