parse-events.c 57.8 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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#include "util/parse-branch-options.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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				if (!path)
					return NULL;
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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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		zfree(&path);
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	}

	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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	(*idx)++;
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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;
}

629 630
int parse_events_load_bpf_obj(struct parse_events_evlist *data,
			      struct list_head *list,
631 632
			      struct bpf_object *obj,
			      struct list_head *head_config)
633 634 635
{
	int err;
	char errbuf[BUFSIZ];
636
	struct __add_bpf_event_param param = {data, list, head_config};
637
	static bool registered_unprobe_atexit = false;
638 639 640 641 642 643 644 645

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

646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661
	/*
	 * 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;
	}

662 663 664 665 666 667
	err = bpf__load(obj);
	if (err) {
		bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
		goto errout;
	}

668
	err = bpf__foreach_event(obj, add_bpf_event, &param);
669 670 671 672 673 674 675
	if (err) {
		snprintf(errbuf, sizeof(errbuf),
			 "Attach events in BPF object failed");
		goto errout;
	}

	return 0;
676 677 678 679 680 681
errout:
	data->error->help = strdup("(add -v to see detail)");
	data->error->str = strdup(errbuf);
	return err;
}

682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706
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;
		}

707
		err = bpf__config_obj(obj, term, data->evlist, &error_pos);
708
		if (err) {
709
			bpf__strerror_config_obj(obj, term, data->evlist,
710 711 712
						 &error_pos, err, errbuf,
						 sizeof(errbuf));
			data->error->help = strdup(
713
"Hint:\tValid config terms:\n"
714 715
"     \tmap:[<arraymap>].value<indices>=[value]\n"
"     \tmap:[<eventmap>].event<indices>=[event]\n"
716
"\n"
717
"     \twhere <indices> is something like [0,3...5] or [all]\n"
718 719 720 721 722 723 724 725 726 727 728 729
"     \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;
}

730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
/*
 * 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);
}

759 760
int parse_events_load_bpf(struct parse_events_evlist *data,
			  struct list_head *list,
761
			  char *bpf_file_name,
762 763
			  bool source,
			  struct list_head *head_config)
764
{
765
	int err;
766 767 768 769 770
	struct bpf_object *obj;
	LIST_HEAD(obj_head_config);

	if (head_config)
		split_bpf_config_terms(head_config, &obj_head_config);
771

772
	obj = bpf__prepare_load(bpf_file_name, source);
773
	if (IS_ERR(obj)) {
774 775
		char errbuf[BUFSIZ];

776
		err = PTR_ERR(obj);
777 778 779 780 781

		if (err == -ENOTSUP)
			snprintf(errbuf, sizeof(errbuf),
				 "BPF support is not compiled");
		else
782 783 784 785
			bpf__strerror_prepare_load(bpf_file_name,
						   source,
						   -err, errbuf,
						   sizeof(errbuf));
786 787 788 789 790 791

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

792
	err = parse_events_load_bpf_obj(data, list, obj, head_config);
793 794
	if (err)
		return err;
795 796 797 798 799 800 801 802 803
	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;
804 805
}

806 807
static int
parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
808 809 810 811
{
	int i;

	for (i = 0; i < 3; i++) {
812
		if (!type || !type[i])
813 814
			break;

815 816 817 818 819 820 821 822
#define CHECK_SET_TYPE(bit)		\
do {					\
	if (attr->bp_type & bit)	\
		return -EINVAL;		\
	else				\
		attr->bp_type |= bit;	\
} while (0)

823 824
		switch (type[i]) {
		case 'r':
825
			CHECK_SET_TYPE(HW_BREAKPOINT_R);
826 827
			break;
		case 'w':
828
			CHECK_SET_TYPE(HW_BREAKPOINT_W);
829 830
			break;
		case 'x':
831
			CHECK_SET_TYPE(HW_BREAKPOINT_X);
832 833
			break;
		default:
834
			return -EINVAL;
835 836
		}
	}
837

838 839
#undef CHECK_SET_TYPE

840 841 842
	if (!attr->bp_type) /* Default */
		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;

843
	return 0;
844 845
}

846
int parse_events_add_breakpoint(struct list_head *list, int *idx,
847
				void *ptr, char *type, u64 len)
848
{
849
	struct perf_event_attr attr;
850

851
	memset(&attr, 0, sizeof(attr));
852
	attr.bp_addr = (unsigned long) ptr;
853

854 855
	if (parse_breakpoint_type(type, &attr))
		return -EINVAL;
856

857 858 859 860 861 862 863 864 865
	/* 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;
866

867
	attr.type = PERF_TYPE_BREAKPOINT;
868
	attr.sample_period = 1;
869

870
	return add_event(list, idx, &attr, NULL, NULL);
871 872
}

873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889
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;
}

890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906
/*
 * 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",
907
	[PARSE_EVENTS__TERM_TYPE_MAX_STACK]		= "max-stack",
W
Wang Nan 已提交
908 909
	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
910
	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
911 912
};

913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
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:
930
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948
		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;
}

949 950 951
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err)
952
{
953 954 955 956
#define CHECK_TYPE_VAL(type)						   \
do {									   \
	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
		return -EINVAL;						   \
957 958 959
} while (0)

	switch (term->type_term) {
960
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
961
		CHECK_TYPE_VAL(NUM);
962 963 964
		attr->config = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
965
		CHECK_TYPE_VAL(NUM);
966 967 968
		attr->config1 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
969
		CHECK_TYPE_VAL(NUM);
970 971 972
		attr->config2 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
973
		CHECK_TYPE_VAL(NUM);
974
		break;
975 976 977
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
		CHECK_TYPE_VAL(NUM);
		break;
978
	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
979 980 981 982 983 984 985
		CHECK_TYPE_VAL(STR);
		if (strcmp(term->val.str, "no") &&
		    parse_branch_str(term->val.str, &attr->branch_sample_type)) {
			err->str = strdup("invalid branch sample type");
			err->idx = term->err_val;
			return -EINVAL;
		}
986
		break;
K
Kan Liang 已提交
987 988 989 990 991 992 993 994
	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;
995 996 997 998 999 1000
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
		CHECK_TYPE_VAL(STR);
		break;
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
		CHECK_TYPE_VAL(NUM);
		break;
1001 1002 1003 1004 1005 1006
	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
1007 1008 1009 1010 1011 1012
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
1013 1014 1015
	case PARSE_EVENTS__TERM_TYPE_NAME:
		CHECK_TYPE_VAL(STR);
		break;
1016 1017 1018
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
		CHECK_TYPE_VAL(NUM);
		break;
1019
	default:
1020 1021 1022
		err->str = strdup("unknown term");
		err->idx = term->err_term;
		err->help = parse_events_formats_error_string(NULL);
1023 1024
		return -EINVAL;
	}
1025

1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
	/*
	 * 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;
1037
	return 0;
1038
#undef CHECK_TYPE_VAL
1039 1040
}

1041 1042 1043 1044
static int config_term_pmu(struct perf_event_attr *attr,
			   struct parse_events_term *term,
			   struct parse_events_error *err)
{
1045 1046
	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1047 1048 1049 1050 1051 1052 1053 1054 1055
		/*
		 * 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);
}

1056 1057 1058 1059 1060 1061 1062
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:
1063 1064
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1065
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
W
Wang Nan 已提交
1066 1067
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
		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;
}

1081
static int config_attr(struct perf_event_attr *attr,
1082
		       struct list_head *head,
1083 1084
		       struct parse_events_error *err,
		       config_term_func_t config_term)
1085
{
1086
	struct parse_events_term *term;
1087 1088

	list_for_each_entry(term, head, list)
1089
		if (config_term(attr, term, err))
1090 1091 1092 1093 1094
			return -EINVAL;

	return 0;
}

1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
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) {
1116 1117
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
K
Kan Liang 已提交
1118
			break;
1119 1120 1121
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
			break;
K
Kan Liang 已提交
1122 1123 1124
		case PARSE_EVENTS__TERM_TYPE_TIME:
			ADD_CONFIG_TERM(TIME, time, term->val.num);
			break;
1125 1126 1127
		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
			ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
			break;
1128 1129 1130
		case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
			ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
			break;
1131 1132 1133
		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
			ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
			break;
1134 1135 1136 1137 1138 1139
		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;
1140 1141 1142
		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
			break;
W
Wang Nan 已提交
1143 1144 1145 1146 1147 1148
		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;
1149 1150 1151
		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
			break;
1152 1153 1154 1155 1156 1157 1158 1159
		default:
			break;
		}
	}
#undef ADD_EVSEL_CONFIG
	return 0;
}

1160
int parse_events_add_tracepoint(struct list_head *list, int *idx,
1161
				const char *sys, const char *event,
1162
				struct parse_events_error *err,
1163 1164 1165 1166 1167
				struct list_head *head_config)
{
	if (head_config) {
		struct perf_event_attr attr;

1168
		if (config_attr(&attr, head_config, err,
1169 1170 1171 1172 1173 1174
				config_term_tracepoint))
			return -EINVAL;
	}

	if (strpbrk(sys, "*?"))
		return add_tracepoint_multi_sys(list, idx, sys, event,
1175
						err, head_config);
1176 1177
	else
		return add_tracepoint_event(list, idx, sys, event,
1178
					    err, head_config);
1179 1180
}

1181 1182
int parse_events_add_numeric(struct parse_events_evlist *data,
			     struct list_head *list,
1183
			     u32 type, u64 config,
1184
			     struct list_head *head_config)
1185
{
1186
	struct perf_event_attr attr;
1187
	LIST_HEAD(config_terms);
1188

1189 1190 1191
	memset(&attr, 0, sizeof(attr));
	attr.type = type;
	attr.config = config;
1192

1193
	if (head_config) {
1194 1195
		if (config_attr(&attr, head_config, data->error,
				config_term_common))
1196 1197 1198 1199 1200
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
1201

1202 1203
	return add_event(list, &data->idx, &attr,
			 get_config_name(head_config), &config_terms);
1204
}
1205

1206 1207 1208
int parse_events_add_pmu(struct parse_events_evlist *data,
			 struct list_head *list, char *name,
			 struct list_head *head_config)
1209 1210
{
	struct perf_event_attr attr;
1211
	struct perf_pmu_info info;
1212
	struct perf_pmu *pmu;
1213
	struct perf_evsel *evsel;
1214
	LIST_HEAD(config_terms);
1215 1216 1217 1218 1219

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

1220 1221 1222 1223 1224 1225
	if (pmu->default_config) {
		memcpy(&attr, pmu->default_config,
		       sizeof(struct perf_event_attr));
	} else {
		memset(&attr, 0, sizeof(attr));
	}
1226

1227 1228
	if (!head_config) {
		attr.type = pmu->type;
1229
		evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1230 1231 1232
		return evsel ? 0 : -ENOMEM;
	}

1233
	if (perf_pmu__check_alias(pmu, head_config, &info))
1234 1235
		return -EINVAL;

1236 1237 1238 1239
	/*
	 * Configure hardcoded terms first, no need to check
	 * return value when called with fail == 0 ;)
	 */
1240
	if (config_attr(&attr, head_config, data->error, config_term_pmu))
1241
		return -EINVAL;
1242

1243 1244 1245
	if (get_config_terms(head_config, &config_terms))
		return -ENOMEM;

1246
	if (perf_pmu__config(pmu, &attr, head_config, data->error))
1247 1248
		return -EINVAL;

1249
	evsel = __add_event(list, &data->idx, &attr,
1250
			    get_config_name(head_config), pmu->cpus,
1251
			    &config_terms);
1252
	if (evsel) {
1253 1254
		evsel->unit = info.unit;
		evsel->scale = info.scale;
1255
		evsel->per_pkg = info.per_pkg;
1256
		evsel->snapshot = info.snapshot;
1257 1258 1259
	}

	return evsel ? 0 : -ENOMEM;
1260 1261
}

1262 1263
int parse_events__modifier_group(struct list_head *list,
				 char *event_mod)
1264
{
1265 1266 1267
	return parse_events__modifier_event(list, event_mod, true);
}

1268
void parse_events__set_leader(char *name, struct list_head *list)
1269 1270 1271
{
	struct perf_evsel *leader;

1272 1273 1274 1275 1276
	if (list_empty(list)) {
		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
		return;
	}

1277 1278
	__perf_evlist__set_leader(list);
	leader = list_entry(list->next, struct perf_evsel, node);
1279
	leader->group_name = name ? strdup(name) : NULL;
1280 1281
}

1282
/* list_event is assumed to point to malloc'ed memory */
1283 1284 1285 1286 1287
void parse_events_update_lists(struct list_head *list_event,
			       struct list_head *list_all)
{
	/*
	 * Called for single event definition. Update the
1288
	 * 'all event' list, and reinit the 'single event'
1289 1290 1291
	 * list, for next event definition.
	 */
	list_splice_tail(list_event, list_all);
1292
	free(list_event);
1293 1294
}

1295 1296 1297 1298 1299 1300
struct event_modifier {
	int eu;
	int ek;
	int eh;
	int eH;
	int eG;
1301
	int eI;
1302
	int precise;
1303
	int precise_max;
1304
	int exclude_GH;
1305
	int sample_read;
1306
	int pinned;
1307 1308 1309 1310
};

static int get_event_modifier(struct event_modifier *mod, char *str,
			       struct perf_evsel *evsel)
1311
{
1312 1313 1314 1315 1316
	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;
1317
	int eI = evsel ? evsel->attr.exclude_idle : 0;
1318
	int precise = evsel ? evsel->attr.precise_ip : 0;
1319
	int precise_max = 0;
1320
	int sample_read = 0;
1321
	int pinned = evsel ? evsel->attr.pinned : 0;
1322

1323 1324 1325 1326
	int exclude = eu | ek | eh;
	int exclude_GH = evsel ? evsel->exclude_GH : 0;

	memset(mod, 0, sizeof(*mod));
1327

1328
	while (*str) {
P
Peter Zijlstra 已提交
1329 1330 1331
		if (*str == 'u') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1332
			eu = 0;
P
Peter Zijlstra 已提交
1333 1334 1335
		} else if (*str == 'k') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1336
			ek = 0;
P
Peter Zijlstra 已提交
1337 1338 1339
		} else if (*str == 'h') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1340
			eh = 0;
1341 1342 1343 1344 1345 1346 1347 1348
		} 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;
1349 1350
		} else if (*str == 'I') {
			eI = 1;
P
Peter Zijlstra 已提交
1351 1352
		} else if (*str == 'p') {
			precise++;
1353 1354 1355
			/* use of precise requires exclude_guest */
			if (!exclude_GH)
				eG = 1;
1356 1357
		} else if (*str == 'P') {
			precise_max = 1;
1358 1359
		} else if (*str == 'S') {
			sample_read = 1;
1360 1361
		} else if (*str == 'D') {
			pinned = 1;
P
Peter Zijlstra 已提交
1362
		} else
1363
			break;
P
Peter Zijlstra 已提交
1364

1365
		++str;
1366
	}
1367

1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379
	/*
	 * 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;
1380

1381 1382 1383 1384 1385
	mod->eu = eu;
	mod->ek = ek;
	mod->eh = eh;
	mod->eH = eH;
	mod->eG = eG;
1386
	mod->eI = eI;
1387
	mod->precise = precise;
1388
	mod->precise_max = precise_max;
1389
	mod->exclude_GH = exclude_GH;
1390
	mod->sample_read = sample_read;
1391 1392
	mod->pinned = pinned;

1393 1394 1395
	return 0;
}

1396 1397 1398 1399 1400 1401 1402 1403 1404
/*
 * 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. */
1405
	if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
		return -1;

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

	return 0;
}

1417 1418 1419 1420 1421 1422 1423 1424
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;

1425 1426 1427
	if (check_modifier(str))
		return -EINVAL;

1428 1429 1430
	if (!add && get_event_modifier(&mod, str, NULL))
		return -EINVAL;

1431
	__evlist__for_each_entry(list, evsel) {
1432 1433 1434 1435 1436 1437 1438 1439 1440
		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;
1441
		evsel->attr.exclude_idle   = mod.eI;
1442
		evsel->exclude_GH          = mod.exclude_GH;
1443
		evsel->sample_read         = mod.sample_read;
1444
		evsel->precise_max         = mod.precise_max;
1445 1446 1447

		if (perf_evsel__is_group_leader(evsel))
			evsel->attr.pinned = mod.pinned;
1448
	}
1449

1450 1451
	return 0;
}
1452

1453 1454 1455 1456
int parse_events_name(struct list_head *list, char *name)
{
	struct perf_evsel *evsel;

1457
	__evlist__for_each_entry(list, evsel) {
1458 1459 1460 1461 1462 1463 1464
		if (!evsel->name)
			evsel->name = strdup(name);
	}

	return 0;
}

1465 1466 1467 1468 1469 1470
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;

1471
	return strcasecmp(pmu1->symbol, pmu2->symbol);
1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
}

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;
1482
			zfree(&p->symbol);
1483
		}
1484
		zfree(&perf_pmu_events_list);
1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507
		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;

1508 1509 1510 1511 1512 1513 1514 1515 1516 1517
	pmu = NULL;
	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
		list_for_each_entry(alias, &pmu->aliases, list) {
			if (strchr(alias->name, '-'))
				len++;
			len++;
		}
	}

	if (len == 0) {
1518 1519 1520 1521 1522 1523 1524 1525 1526
		perf_pmu_events_list_num = -1;
		return;
	}
	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;
1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
	pmu = NULL;
	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
		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++;
			}
1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572
		}
	}
	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);
1573
	zfree(&p.symbol);
1574 1575 1576
	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
}

1577
static int parse_events__scanner(const char *str, void *data, int start_token)
1578
{
1579
	YY_BUFFER_STATE buffer;
1580
	void *scanner;
1581
	int ret;
1582

1583
	ret = parse_events_lex_init_extra(start_token, &scanner);
1584 1585 1586 1587
	if (ret)
		return ret;

	buffer = parse_events__scan_string(str, scanner);
1588

1589 1590 1591
#ifdef PARSER_DEBUG
	parse_events_debug = 1;
#endif
1592 1593 1594 1595 1596 1597 1598
	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;
}
1599

1600 1601 1602 1603 1604
/*
 * parse event config string, return a list of event terms.
 */
int parse_events_terms(struct list_head *terms, const char *str)
{
1605
	struct parse_events_terms data = {
1606 1607 1608 1609 1610 1611 1612
		.terms = NULL,
	};
	int ret;

	ret = parse_events__scanner(str, &data, PE_START_TERMS);
	if (!ret) {
		list_splice(data.terms, terms);
1613
		zfree(&data.terms);
1614 1615 1616
		return 0;
	}

1617
	parse_events_terms__delete(data.terms);
1618 1619 1620
	return ret;
}

1621 1622
int parse_events(struct perf_evlist *evlist, const char *str,
		 struct parse_events_error *err)
1623
{
1624
	struct parse_events_evlist data = {
1625 1626 1627 1628
		.list   = LIST_HEAD_INIT(data.list),
		.idx    = evlist->nr_entries,
		.error  = err,
		.evlist = evlist,
1629 1630
	};
	int ret;
1631

1632
	ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1633
	perf_pmu__parse_cleanup();
1634
	if (!ret) {
1635 1636
		struct perf_evsel *last;

1637 1638 1639 1640 1641
		if (list_empty(&data.list)) {
			WARN_ONCE(true, "WARNING: event parser found nothing");
			return -1;
		}

1642
		perf_evlist__splice_list_tail(evlist, &data.list);
1643
		evlist->nr_groups += data.nr_groups;
1644 1645 1646
		last = perf_evlist__last(evlist);
		last->cmdline_group_boundary = true;

1647 1648
		return 0;
	}
1649

1650 1651 1652 1653 1654
	/*
	 * 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.
	 */
1655
	return ret;
1656 1657
}

1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684
#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.
		 */
1685
		int max_err_idx = 13;
1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696

		/*
		 * 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;

1697
		/* We're cutting from the beginning. */
1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719
		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);
1720 1721
		zfree(&err->str);
		zfree(&err->help);
1722 1723 1724 1725 1726 1727 1728
	}

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

#undef MAX_WIDTH

1729
int parse_events_option(const struct option *opt, const char *str,
1730
			int unset __maybe_unused)
1731 1732
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1733 1734 1735 1736 1737
	struct parse_events_error err = { .idx = 0, };
	int ret = parse_events(evlist, str, &err);

	if (ret)
		parse_events_print_error(&err, str);
1738 1739

	return ret;
1740 1741
}

1742 1743 1744 1745 1746
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
1747
{
1748
	struct perf_evsel *last = NULL;
1749
	int err;
L
Li Zefan 已提交
1750

1751 1752 1753 1754 1755 1756
	/*
	 * 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.
	 */
1757
	if (evlist->nr_entries > 0)
1758
		last = perf_evlist__last(evlist);
1759

1760
	do {
1761 1762
		err = (*func)(last, arg);
		if (err)
1763
			return -1;
1764 1765
		if (!last)
			return 0;
1766 1767 1768 1769 1770

		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
1771 1772 1773 1774

	return 0;
}

1775 1776 1777
static int set_filter(struct perf_evsel *evsel, const void *arg)
{
	const char *str = arg;
1778 1779 1780
	bool found = false;
	int nr_addr_filters = 0;
	struct perf_pmu *pmu = NULL;
1781

1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792
	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;
1793 1794
	}

1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808
	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) {
1809 1810 1811 1812 1813 1814
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
1815 1816 1817 1818 1819 1820

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

	return -1;
1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
}

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());

1845
	if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863
		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);
}

1864 1865 1866 1867 1868
static const char * const event_type_descriptors[] = {
	"Hardware event",
	"Software event",
	"Tracepoint event",
	"Hardware cache event",
1869 1870
	"Raw hardware event descriptor",
	"Hardware breakpoint",
1871 1872
};

1873 1874 1875 1876 1877 1878 1879 1880
static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;

	return strcmp(*as, *bs);
}

1881 1882 1883 1884
/*
 * Print the events from <debugfs_mount_point>/tracing/events
 */

1885 1886
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
			     bool name_only)
1887 1888
{
	DIR *sys_dir, *evt_dir;
1889
	struct dirent *sys_dirent, *evt_dirent;
1890
	char evt_path[MAXPATHLEN];
E
Eric Dumazet 已提交
1891
	char dir_path[MAXPATHLEN];
1892 1893 1894
	char **evt_list = NULL;
	unsigned int evt_i = 0, evt_num = 0;
	bool evt_num_known = false;
1895

1896
restart:
1897
	sys_dir = opendir(tracing_events_path);
1898
	if (!sys_dir)
E
Eric Dumazet 已提交
1899
		return;
1900

1901 1902 1903 1904 1905 1906
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_close_sys_dir;
	}

1907
	for_each_subsystem(sys_dir, sys_dirent) {
1908
		if (subsys_glob != NULL &&
1909
		    !strglobmatch(sys_dirent->d_name, subsys_glob))
1910
			continue;
E
Eric Dumazet 已提交
1911

1912
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1913
			 sys_dirent->d_name);
E
Eric Dumazet 已提交
1914 1915
		evt_dir = opendir(dir_path);
		if (!evt_dir)
1916
			continue;
E
Eric Dumazet 已提交
1917

1918
		for_each_event(sys_dirent, evt_dir, evt_dirent) {
1919
			if (event_glob != NULL &&
1920
			    !strglobmatch(evt_dirent->d_name, event_glob))
1921 1922
				continue;

1923 1924
			if (!evt_num_known) {
				evt_num++;
1925 1926 1927
				continue;
			}

1928
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
1929
				 sys_dirent->d_name, evt_dirent->d_name);
1930 1931 1932 1933 1934

			evt_list[evt_i] = strdup(evt_path);
			if (evt_list[evt_i] == NULL)
				goto out_close_evt_dir;
			evt_i++;
1935 1936 1937 1938
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953

	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]);
	}
1954
	if (evt_num && pager_in_use())
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
		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;
1973 1974
}

1975 1976 1977 1978 1979 1980 1981
/*
 * Check whether event is in <debugfs_mount_point>/tracing/events
 */

int is_valid_tracepoint(const char *event_string)
{
	DIR *sys_dir, *evt_dir;
1982
	struct dirent *sys_dirent, *evt_dirent;
1983 1984 1985
	char evt_path[MAXPATHLEN];
	char dir_path[MAXPATHLEN];

1986
	sys_dir = opendir(tracing_events_path);
1987 1988 1989
	if (!sys_dir)
		return 0;

1990
	for_each_subsystem(sys_dir, sys_dirent) {
1991

1992
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1993
			 sys_dirent->d_name);
1994 1995 1996 1997
		evt_dir = opendir(dir_path);
		if (!evt_dir)
			continue;

1998
		for_each_event(sys_dirent, evt_dir, evt_dirent) {
1999
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2000
				 sys_dirent->d_name, evt_dirent->d_name);
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
			if (!strcmp(evt_path, event_string)) {
				closedir(evt_dir);
				closedir(sys_dir);
				return 1;
			}
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
	return 0;
}

2013 2014 2015
static bool is_event_supported(u8 type, unsigned config)
{
	bool ret = true;
2016
	int open_return;
2017 2018 2019 2020 2021 2022
	struct perf_evsel *evsel;
	struct perf_event_attr attr = {
		.type = type,
		.config = config,
		.disabled = 1,
	};
2023 2024 2025 2026
	struct thread_map *tmap = thread_map__new_by_tid(0);

	if (tmap == NULL)
		return false;
2027

2028
	evsel = perf_evsel__new(&attr);
2029
	if (evsel) {
2030
		open_return = perf_evsel__open(evsel, NULL, tmap);
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041
		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;
2042
			ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2043
		}
2044 2045 2046 2047 2048 2049
		perf_evsel__delete(evsel);
	}

	return ret;
}

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 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
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);
}

2129
int print_hwcache_events(const char *event_glob, bool name_only)
2130
{
2131
	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2132
	char name[64];
2133 2134 2135 2136 2137 2138 2139 2140 2141
	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;
	}
2142 2143 2144 2145

	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 */
2146
			if (!perf_evsel__is_cache_op_valid(type, op))
2147 2148 2149
				continue;

			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2150 2151
				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
									name, sizeof(name));
2152
				if (event_glob != NULL && !strglobmatch(name, event_glob))
2153 2154
					continue;

2155 2156 2157 2158
				if (!is_event_supported(PERF_TYPE_HW_CACHE,
							type | (op << 8) | (i << 16)))
					continue;

2159 2160 2161 2162 2163 2164 2165 2166 2167
				if (!evt_num_known) {
					evt_num++;
					continue;
				}

				evt_list[evt_i] = strdup(name);
				if (evt_list[evt_i] == NULL)
					goto out_enomem;
				evt_i++;
2168 2169 2170 2171
			}
		}
	}

2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185
	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]);
	}
2186
	if (evt_num && pager_in_use())
2187
		printf("\n");
2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200

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;
2201 2202
}

2203
void print_symbol_events(const char *event_glob, unsigned type,
2204 2205
				struct event_symbol *syms, unsigned max,
				bool name_only)
2206
{
2207
	unsigned int i, evt_i = 0, evt_num = 0;
2208
	char name[MAX_NAME_LEN];
2209 2210 2211 2212 2213 2214 2215 2216 2217 2218
	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;
	}
2219

2220
	for (i = 0; i < max; i++, syms++) {
2221

2222
		if (event_glob != NULL && syms->symbol != NULL &&
2223 2224 2225
		    !(strglobmatch(syms->symbol, event_glob) ||
		      (syms->alias && strglobmatch(syms->alias, event_glob))))
			continue;
2226

2227 2228 2229
		if (!is_event_supported(type, i))
			continue;

2230 2231
		if (!evt_num_known) {
			evt_num++;
2232 2233 2234
			continue;
		}

2235
		if (!name_only && strlen(syms->alias))
2236
			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2237
		else
2238
			strncpy(name, syms->symbol, MAX_NAME_LEN);
2239

2240 2241 2242 2243
		evt_list[evt_i] = strdup(name);
		if (evt_list[evt_i] == NULL)
			goto out_enomem;
		evt_i++;
2244 2245
	}

2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258
	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]);
	}
2259
	if (evt_num && pager_in_use())
2260
		printf("\n");
2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272

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;
2273 2274 2275 2276 2277
}

/*
 * Print the help text for the event symbols:
 */
2278 2279
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
			bool long_desc)
2280 2281
{
	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2282
			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2283 2284

	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2285
			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2286

2287
	print_hwcache_events(event_glob, name_only);
2288

2289
	print_pmu_events(event_glob, name_only, quiet_flag, long_desc);
2290

2291 2292
	if (event_glob != NULL)
		return;
2293

2294 2295 2296 2297 2298 2299 2300
	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]);
2301 2302
		if (pager_in_use())
			printf("   (see 'man perf-list' on how to encode it)\n\n");
2303 2304

		printf("  %-50s [%s]\n",
2305
		       "mem:<addr>[/len][:access]",
2306
			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2307 2308
		if (pager_in_use())
			printf("\n");
2309
	}
2310

2311
	print_tracepoint_events(NULL, NULL, name_only);
2312 2313

	print_sdt_events(NULL, NULL, name_only);
2314
}
2315

2316
int parse_events__is_hardcoded_term(struct parse_events_term *term)
2317
{
2318
	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2319 2320
}

2321
static int new_term(struct parse_events_term **_term, int type_val,
2322
		    int type_term, char *config,
2323
		    char *str, u64 num, int err_term, int err_val)
2324
{
2325
	struct parse_events_term *term;
2326 2327 2328 2329 2330 2331

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

	INIT_LIST_HEAD(&term->list);
2332 2333
	term->type_val  = type_val;
	term->type_term = type_term;
2334
	term->config = config;
2335 2336
	term->err_term = err_term;
	term->err_val  = err_val;
2337

2338
	switch (type_val) {
2339 2340 2341 2342 2343 2344 2345
	case PARSE_EVENTS__TERM_TYPE_NUM:
		term->val.num = num;
		break;
	case PARSE_EVENTS__TERM_TYPE_STR:
		term->val.str = str;
		break;
	default:
2346
		free(term);
2347 2348 2349 2350 2351 2352 2353
		return -EINVAL;
	}

	*_term = term;
	return 0;
}

2354
int parse_events_term__num(struct parse_events_term **term,
2355
			   int type_term, char *config, u64 num,
2356
			   void *loc_term_, void *loc_val_)
2357
{
2358 2359 2360
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2361
	return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2362 2363 2364
			config, NULL, num,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
2365 2366
}

2367
int parse_events_term__str(struct parse_events_term **term,
2368
			   int type_term, char *config, char *str,
2369
			   void *loc_term_, void *loc_val_)
2370
{
2371 2372 2373
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2374
	return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2375 2376 2377
			config, str, 0,
			loc_term ? loc_term->first_column : 0,
			loc_val ? loc_val->first_column : 0);
2378 2379
}

2380
int parse_events_term__sym_hw(struct parse_events_term **term,
2381 2382 2383 2384 2385 2386 2387 2388 2389 2390
			      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,
2391
				(char *) sym->symbol, 0, 0, 0);
2392 2393 2394
	else
		return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
				PARSE_EVENTS__TERM_TYPE_USER,
2395 2396
				(char *) "event", (char *) sym->symbol,
				0, 0, 0);
2397 2398
}

2399 2400
int parse_events_term__clone(struct parse_events_term **new,
			     struct parse_events_term *term)
2401 2402
{
	return new_term(new, term->type_val, term->type_term, term->config,
2403 2404
			term->val.str, term->val.num,
			term->err_term, term->err_val);
2405 2406
}

2407
void parse_events_terms__purge(struct list_head *terms)
2408
{
2409
	struct parse_events_term *term, *h;
2410

2411
	list_for_each_entry_safe(term, h, terms, list) {
2412
		if (term->array.nr_ranges)
2413
			zfree(&term->array.ranges);
2414
		list_del_init(&term->list);
2415
		free(term);
2416
	}
2417
}
2418

2419
void parse_events_terms__delete(struct list_head *terms)
2420
{
2421 2422
	if (!terms)
		return;
2423
	parse_events_terms__purge(terms);
2424
	free(terms);
2425 2426
}

2427 2428
void parse_events__clear_array(struct parse_events_array *a)
{
2429
	zfree(&a->ranges);
2430 2431
}

2432 2433 2434 2435 2436
void parse_events_evlist_error(struct parse_events_evlist *data,
			       int idx, const char *str)
{
	struct parse_events_error *err = data->error;

2437 2438
	if (!err)
		return;
2439 2440 2441 2442
	err->idx = idx;
	err->str = strdup(str);
	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
}
2443

2444 2445 2446 2447 2448 2449 2450 2451 2452
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];

2453 2454
		if (!config_term_avail(i, NULL))
			continue;
2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470
		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);
	}
}

2471 2472 2473 2474 2475 2476 2477
/*
 * 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
2478
	/* "no-overwrite" is the longest name */
2479
	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
W
Wang Nan 已提交
2480
			  (sizeof("no-overwrite") - 1)];
2481

2482
	config_terms_list(static_terms, sizeof(static_terms));
2483 2484
	/* valid terms */
	if (additional_terms) {
2485 2486
		if (asprintf(&str, "valid terms: %s,%s",
			     additional_terms, static_terms) < 0)
2487 2488
			goto fail;
	} else {
2489
		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2490 2491 2492 2493 2494 2495 2496
			goto fail;
	}
	return str;

fail:
	return NULL;
}