parse-events.c 64.4 KB
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/hw_breakpoint.h>
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#include <linux/err.h>
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#include <dirent.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
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#include <sys/param.h>
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#include "term.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 "string2.h"
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#include "strlist.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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#include "metricgroup.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 *parse_state, 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(const char *dir_path, struct dirent *evt_dir)
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{
	char evt_path[MAXPATHLEN];
	int fd;

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

	return 0;
}

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#define for_each_event(dir_path, evt_dir, evt_dirent)		\
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	while ((evt_dirent = readdir(evt_dir)) != NULL)		\
		if (evt_dirent->d_type == DT_DIR &&		\
		    (strcmp(evt_dirent->d_name, ".")) &&	\
		    (strcmp(evt_dirent->d_name, "..")) &&	\
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		    (!tp_event_has_id(dir_path, 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;
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	sys_dir = tracing_events__opendir();
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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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		dir_path = get_events_file(sys_dirent->d_name);
		if (!dir_path)
			continue;
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		evt_dir = opendir(dir_path);
		if (!evt_dir)
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			goto next;
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		for_each_event(dir_path, evt_dir, evt_dirent) {
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			scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
				  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) {
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				put_events_file(dir_path);
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				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);
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next:
		put_events_file(dir_path);
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	}

	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 perf_pmu *pmu,
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	    struct list_head *config_terms, bool auto_merge_stats)
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{
	struct perf_evsel *evsel;
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	struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
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	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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	evsel->system_wide = pmu ? pmu->is_uncore : false;
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	evsel->auto_merge_stats = auto_merge_stats;
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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, false) ? 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,
384
			   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) {
447
		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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{
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	char *evt_path;
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	struct dirent *evt_ent;
	DIR *evt_dir;
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	int ret = 0, found = 0;
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	evt_path = get_events_file(sys_name);
	if (!evt_path) {
		tracepoint_error(err, errno, sys_name, evt_name);
		return -1;
	}
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	evt_dir = opendir(evt_path);
	if (!evt_dir) {
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		put_events_file(evt_path);
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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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	put_events_file(evt_path);
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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;

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	events_dir = tracing_events__opendir();
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	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 {
607
	struct parse_events_state *parse_state;
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	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;
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	struct parse_events_state *parse_state = param->parse_state;
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	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",
623
		 group, event, fd);
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625 626
	err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
					  event, parse_state->error,
627
					  param->head_config);
628 629 630 631
	if (err) {
		struct perf_evsel *evsel, *tmp;

		pr_debug("Failed to add BPF event %s:%s\n",
632
			 group, event);
633 634 635 636 637 638
		list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
			list_del(&evsel->node);
			perf_evsel__delete(evsel);
		}
		return err;
	}
639
	pr_debug("adding %s:%s\n", group, event);
640

641 642
	list_for_each_entry(pos, &new_evsels, node) {
		pr_debug("adding %s:%s to %p\n",
643
			 group, event, pos);
644 645
		pos->bpf_fd = fd;
	}
646 647 648 649
	list_splice(&new_evsels, list);
	return 0;
}

650
int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
651
			      struct list_head *list,
652 653
			      struct bpf_object *obj,
			      struct list_head *head_config)
654 655 656
{
	int err;
	char errbuf[BUFSIZ];
657
	struct __add_bpf_event_param param = {parse_state, list, head_config};
658
	static bool registered_unprobe_atexit = false;
659 660 661 662 663 664 665 666

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

667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682
	/*
	 * 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;
	}

683 684 685 686 687 688
	err = bpf__load(obj);
	if (err) {
		bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
		goto errout;
	}

689
	err = bpf__foreach_event(obj, add_bpf_event, &param);
690 691 692 693 694 695 696
	if (err) {
		snprintf(errbuf, sizeof(errbuf),
			 "Attach events in BPF object failed");
		goto errout;
	}

	return 0;
697
errout:
698 699
	parse_state->error->help = strdup("(add -v to see detail)");
	parse_state->error->str = strdup(errbuf);
700 701 702
	return err;
}

703
static int
704
parse_events_config_bpf(struct parse_events_state *parse_state,
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722
			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';

723 724
			parse_state->error->idx = term->err_term;
			parse_state->error->str = strdup(errbuf);
725 726 727
			return -EINVAL;
		}

728
		err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
729
		if (err) {
730
			bpf__strerror_config_obj(obj, term, parse_state->evlist,
731 732
						 &error_pos, err, errbuf,
						 sizeof(errbuf));
733
			parse_state->error->help = strdup(
734
"Hint:\tValid config terms:\n"
735 736
"     \tmap:[<arraymap>].value<indices>=[value]\n"
"     \tmap:[<eventmap>].event<indices>=[event]\n"
737
"\n"
738
"     \twhere <indices> is something like [0,3...5] or [all]\n"
739
"     \t(add -v to see detail)");
740
			parse_state->error->str = strdup(errbuf);
741
			if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
742
				parse_state->error->idx = term->err_val;
743
			else
744
				parse_state->error->idx = term->err_term + error_pos;
745 746 747 748 749 750
			return err;
		}
	}
	return 0;
}

751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779
/*
 * 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);
}

780
int parse_events_load_bpf(struct parse_events_state *parse_state,
781
			  struct list_head *list,
782
			  char *bpf_file_name,
783 784
			  bool source,
			  struct list_head *head_config)
785
{
786
	int err;
787 788 789 790 791
	struct bpf_object *obj;
	LIST_HEAD(obj_head_config);

	if (head_config)
		split_bpf_config_terms(head_config, &obj_head_config);
792

793
	obj = bpf__prepare_load(bpf_file_name, source);
794
	if (IS_ERR(obj)) {
795 796
		char errbuf[BUFSIZ];

797
		err = PTR_ERR(obj);
798 799 800 801 802

		if (err == -ENOTSUP)
			snprintf(errbuf, sizeof(errbuf),
				 "BPF support is not compiled");
		else
803 804 805 806
			bpf__strerror_prepare_load(bpf_file_name,
						   source,
						   -err, errbuf,
						   sizeof(errbuf));
807

808 809
		parse_state->error->help = strdup("(add -v to see detail)");
		parse_state->error->str = strdup(errbuf);
810 811 812
		return err;
	}

813
	err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
814 815
	if (err)
		return err;
816
	err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
817 818 819 820 821 822 823 824

	/*
	 * 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;
825 826
}

827 828
static int
parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
829 830 831 832
{
	int i;

	for (i = 0; i < 3; i++) {
833
		if (!type || !type[i])
834 835
			break;

836 837 838 839 840 841 842 843
#define CHECK_SET_TYPE(bit)		\
do {					\
	if (attr->bp_type & bit)	\
		return -EINVAL;		\
	else				\
		attr->bp_type |= bit;	\
} while (0)

844 845
		switch (type[i]) {
		case 'r':
846
			CHECK_SET_TYPE(HW_BREAKPOINT_R);
847 848
			break;
		case 'w':
849
			CHECK_SET_TYPE(HW_BREAKPOINT_W);
850 851
			break;
		case 'x':
852
			CHECK_SET_TYPE(HW_BREAKPOINT_X);
853 854
			break;
		default:
855
			return -EINVAL;
856 857
		}
	}
858

859 860
#undef CHECK_SET_TYPE

861 862 863
	if (!attr->bp_type) /* Default */
		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;

864
	return 0;
865 866
}

867
int parse_events_add_breakpoint(struct list_head *list, int *idx,
868
				void *ptr, char *type, u64 len)
869
{
870
	struct perf_event_attr attr;
871

872
	memset(&attr, 0, sizeof(attr));
873
	attr.bp_addr = (unsigned long) ptr;
874

875 876
	if (parse_breakpoint_type(type, &attr))
		return -EINVAL;
877

878 879 880 881 882 883 884 885 886
	/* 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;
887

888
	attr.type = PERF_TYPE_BREAKPOINT;
889
	attr.sample_period = 1;
890

891
	return add_event(list, idx, &attr, NULL, NULL);
892 893
}

894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910
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;
}

911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927
/*
 * 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",
928
	[PARSE_EVENTS__TERM_TYPE_MAX_STACK]		= "max-stack",
W
Wang Nan 已提交
929 930
	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
931
	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
932 933
};

934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950
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:
951
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969
		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;
}

970 971 972
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err)
973
{
974 975 976 977
#define CHECK_TYPE_VAL(type)						   \
do {									   \
	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
		return -EINVAL;						   \
978 979 980
} while (0)

	switch (term->type_term) {
981
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
982
		CHECK_TYPE_VAL(NUM);
983 984 985
		attr->config = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
986
		CHECK_TYPE_VAL(NUM);
987 988 989
		attr->config1 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
990
		CHECK_TYPE_VAL(NUM);
991 992 993
		attr->config2 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
994
		CHECK_TYPE_VAL(NUM);
995
		break;
996 997 998
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
		CHECK_TYPE_VAL(NUM);
		break;
999
	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1000 1001 1002 1003 1004 1005 1006
		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;
		}
1007
		break;
K
Kan Liang 已提交
1008 1009 1010 1011 1012 1013 1014 1015
	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;
1016 1017 1018 1019 1020 1021
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
		CHECK_TYPE_VAL(STR);
		break;
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
		CHECK_TYPE_VAL(NUM);
		break;
1022 1023 1024 1025 1026 1027
	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
1028 1029 1030 1031 1032 1033
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
1034 1035 1036
	case PARSE_EVENTS__TERM_TYPE_NAME:
		CHECK_TYPE_VAL(STR);
		break;
1037 1038 1039
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
		CHECK_TYPE_VAL(NUM);
		break;
1040
	default:
1041 1042 1043
		err->str = strdup("unknown term");
		err->idx = term->err_term;
		err->help = parse_events_formats_error_string(NULL);
1044 1045
		return -EINVAL;
	}
1046

1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
	/*
	 * 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;
1058
	return 0;
1059
#undef CHECK_TYPE_VAL
1060 1061
}

1062 1063 1064 1065
static int config_term_pmu(struct perf_event_attr *attr,
			   struct parse_events_term *term,
			   struct parse_events_error *err)
{
1066 1067
	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1068 1069 1070 1071 1072 1073 1074 1075 1076
		/*
		 * 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);
}

1077 1078 1079 1080 1081 1082 1083
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:
1084 1085
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1086
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
W
Wang Nan 已提交
1087 1088
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
		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;
}

1102
static int config_attr(struct perf_event_attr *attr,
1103
		       struct list_head *head,
1104 1105
		       struct parse_events_error *err,
		       config_term_func_t config_term)
1106
{
1107
	struct parse_events_term *term;
1108 1109

	list_for_each_entry(term, head, list)
1110
		if (config_term(attr, term, err))
1111 1112 1113 1114 1115
			return -EINVAL;

	return 0;
}

1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
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;				\
1130
	__t->weak	= term->weak;				\
1131 1132 1133 1134 1135 1136 1137
	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) {
1138 1139
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
K
Kan Liang 已提交
1140
			break;
1141 1142 1143
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
			break;
K
Kan Liang 已提交
1144 1145 1146
		case PARSE_EVENTS__TERM_TYPE_TIME:
			ADD_CONFIG_TERM(TIME, time, term->val.num);
			break;
1147 1148 1149
		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
			ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
			break;
1150 1151 1152
		case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
			ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
			break;
1153 1154 1155
		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
			ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
			break;
1156 1157 1158 1159 1160 1161
		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;
1162 1163 1164
		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
			break;
W
Wang Nan 已提交
1165 1166 1167 1168 1169 1170
		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;
1171 1172 1173
		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
			break;
1174 1175 1176 1177 1178 1179 1180 1181
		default:
			break;
		}
	}
#undef ADD_EVSEL_CONFIG
	return 0;
}

1182
int parse_events_add_tracepoint(struct list_head *list, int *idx,
1183
				const char *sys, const char *event,
1184
				struct parse_events_error *err,
1185 1186 1187 1188 1189
				struct list_head *head_config)
{
	if (head_config) {
		struct perf_event_attr attr;

1190
		if (config_attr(&attr, head_config, err,
1191 1192 1193 1194 1195 1196
				config_term_tracepoint))
			return -EINVAL;
	}

	if (strpbrk(sys, "*?"))
		return add_tracepoint_multi_sys(list, idx, sys, event,
1197
						err, head_config);
1198 1199
	else
		return add_tracepoint_event(list, idx, sys, event,
1200
					    err, head_config);
1201 1202
}

1203
int parse_events_add_numeric(struct parse_events_state *parse_state,
1204
			     struct list_head *list,
1205
			     u32 type, u64 config,
1206
			     struct list_head *head_config)
1207
{
1208
	struct perf_event_attr attr;
1209
	LIST_HEAD(config_terms);
1210

1211 1212 1213
	memset(&attr, 0, sizeof(attr));
	attr.type = type;
	attr.config = config;
1214

1215
	if (head_config) {
1216
		if (config_attr(&attr, head_config, parse_state->error,
1217
				config_term_common))
1218 1219 1220 1221 1222
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
1223

1224
	return add_event(list, &parse_state->idx, &attr,
1225
			 get_config_name(head_config), &config_terms);
1226
}
1227

1228
int parse_events_add_pmu(struct parse_events_state *parse_state,
1229
			 struct list_head *list, char *name,
1230 1231 1232
			 struct list_head *head_config,
			 bool auto_merge_stats,
			 bool use_alias)
1233 1234
{
	struct perf_event_attr attr;
1235
	struct perf_pmu_info info;
1236
	struct perf_pmu *pmu;
1237
	struct perf_evsel *evsel;
1238
	struct parse_events_error *err = parse_state->error;
1239
	bool use_uncore_alias;
1240
	LIST_HEAD(config_terms);
1241 1242

	pmu = perf_pmu__find(name);
1243 1244 1245 1246 1247
	if (!pmu) {
		if (asprintf(&err->str,
				"Cannot find PMU `%s'. Missing kernel support?",
				name) < 0)
			err->str = NULL;
1248
		return -EINVAL;
1249
	}
1250

1251 1252 1253 1254 1255 1256
	if (pmu->default_config) {
		memcpy(&attr, pmu->default_config,
		       sizeof(struct perf_event_attr));
	} else {
		memset(&attr, 0, sizeof(attr));
	}
1257

1258 1259
	use_uncore_alias = (pmu->is_uncore && use_alias);

1260 1261
	if (!head_config) {
		attr.type = pmu->type;
1262
		evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1263 1264
		if (evsel) {
			evsel->pmu_name = name;
1265
			evsel->use_uncore_alias = use_uncore_alias;
1266 1267 1268 1269
			return 0;
		} else {
			return -ENOMEM;
		}
1270 1271
	}

1272
	if (perf_pmu__check_alias(pmu, head_config, &info))
1273 1274
		return -EINVAL;

1275 1276 1277 1278
	/*
	 * Configure hardcoded terms first, no need to check
	 * return value when called with fail == 0 ;)
	 */
1279
	if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1280
		return -EINVAL;
1281

1282 1283 1284
	if (get_config_terms(head_config, &config_terms))
		return -ENOMEM;

1285
	if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1286 1287
		return -EINVAL;

1288
	evsel = __add_event(list, &parse_state->idx, &attr,
1289
			    get_config_name(head_config), pmu,
1290
			    &config_terms, auto_merge_stats);
1291
	if (evsel) {
1292 1293
		evsel->unit = info.unit;
		evsel->scale = info.scale;
1294
		evsel->per_pkg = info.per_pkg;
1295
		evsel->snapshot = info.snapshot;
1296
		evsel->metric_expr = info.metric_expr;
1297
		evsel->metric_name = info.metric_name;
1298
		evsel->pmu_name = name;
1299
		evsel->use_uncore_alias = use_uncore_alias;
1300 1301 1302
	}

	return evsel ? 0 : -ENOMEM;
1303 1304
}

1305
int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333
			       char *str, struct list_head **listp)
{
	struct list_head *head;
	struct parse_events_term *term;
	struct list_head *list;
	struct perf_pmu *pmu = NULL;
	int ok = 0;

	*listp = NULL;
	/* Add it for all PMUs that support the alias */
	list = malloc(sizeof(struct list_head));
	if (!list)
		return -1;
	INIT_LIST_HEAD(list);
	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
		struct perf_pmu_alias *alias;

		list_for_each_entry(alias, &pmu->aliases, list) {
			if (!strcasecmp(alias->name, str)) {
				head = malloc(sizeof(struct list_head));
				if (!head)
					return -1;
				INIT_LIST_HEAD(head);
				if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
							   str, 1, false, &str, NULL) < 0)
					return -1;
				list_add_tail(&term->list, head);

1334
				if (!parse_events_add_pmu(parse_state, list,
1335 1336
							  pmu->name, head,
							  true, true)) {
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
					pr_debug("%s -> %s/%s/\n", str,
						 pmu->name, alias->str);
					ok++;
				}

				parse_events_terms__delete(head);
			}
		}
	}
	if (!ok)
		return -1;
	*listp = list;
	return 0;
}

1352 1353
int parse_events__modifier_group(struct list_head *list,
				 char *event_mod)
1354
{
1355 1356 1357
	return parse_events__modifier_event(list, event_mod, true);
}

1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471
/*
 * Check if the two uncore PMUs are from the same uncore block
 * The format of the uncore PMU name is uncore_#blockname_#pmuidx
 */
static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
{
	char *end_a, *end_b;

	end_a = strrchr(pmu_name_a, '_');
	end_b = strrchr(pmu_name_b, '_');

	if (!end_a || !end_b)
		return false;

	if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
		return false;

	return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
}

static int
parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
					   struct parse_events_state *parse_state)
{
	struct perf_evsel *evsel, *leader;
	uintptr_t *leaders;
	bool is_leader = true;
	int i, nr_pmu = 0, total_members, ret = 0;

	leader = list_first_entry(list, struct perf_evsel, node);
	evsel = list_last_entry(list, struct perf_evsel, node);
	total_members = evsel->idx - leader->idx + 1;

	leaders = calloc(total_members, sizeof(uintptr_t));
	if (WARN_ON(!leaders))
		return 0;

	/*
	 * Going through the whole group and doing sanity check.
	 * All members must use alias, and be from the same uncore block.
	 * Also, storing the leader events in an array.
	 */
	__evlist__for_each_entry(list, evsel) {

		/* Only split the uncore group which members use alias */
		if (!evsel->use_uncore_alias)
			goto out;

		/* The events must be from the same uncore block */
		if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
			goto out;

		if (!is_leader)
			continue;
		/*
		 * If the event's PMU name starts to repeat, it must be a new
		 * event. That can be used to distinguish the leader from
		 * other members, even they have the same event name.
		 */
		if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
			is_leader = false;
			continue;
		}
		/* The name is always alias name */
		WARN_ON(strcmp(leader->name, evsel->name));

		/* Store the leader event for each PMU */
		leaders[nr_pmu++] = (uintptr_t) evsel;
	}

	/* only one event alias */
	if (nr_pmu == total_members) {
		parse_state->nr_groups--;
		goto handled;
	}

	/*
	 * An uncore event alias is a joint name which means the same event
	 * runs on all PMUs of a block.
	 * Perf doesn't support mixed events from different PMUs in the same
	 * group. The big group has to be split into multiple small groups
	 * which only include the events from the same PMU.
	 *
	 * Here the uncore event aliases must be from the same uncore block.
	 * The number of PMUs must be same for each alias. The number of new
	 * small groups equals to the number of PMUs.
	 * Setting the leader event for corresponding members in each group.
	 */
	i = 0;
	__evlist__for_each_entry(list, evsel) {
		if (i >= nr_pmu)
			i = 0;
		evsel->leader = (struct perf_evsel *) leaders[i++];
	}

	/* The number of members and group name are same for each group */
	for (i = 0; i < nr_pmu; i++) {
		evsel = (struct perf_evsel *) leaders[i];
		evsel->nr_members = total_members / nr_pmu;
		evsel->group_name = name ? strdup(name) : NULL;
	}

	/* Take the new small groups into account */
	parse_state->nr_groups += nr_pmu - 1;

handled:
	ret = 1;
out:
	free(leaders);
	return ret;
}

void parse_events__set_leader(char *name, struct list_head *list,
			      struct parse_events_state *parse_state)
1472 1473 1474
{
	struct perf_evsel *leader;

1475 1476 1477 1478 1479
	if (list_empty(list)) {
		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
		return;
	}

1480 1481 1482
	if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
		return;

1483 1484
	__perf_evlist__set_leader(list);
	leader = list_entry(list->next, struct perf_evsel, node);
1485
	leader->group_name = name ? strdup(name) : NULL;
1486 1487
}

1488
/* list_event is assumed to point to malloc'ed memory */
1489 1490 1491 1492 1493
void parse_events_update_lists(struct list_head *list_event,
			       struct list_head *list_all)
{
	/*
	 * Called for single event definition. Update the
1494
	 * 'all event' list, and reinit the 'single event'
1495 1496 1497
	 * list, for next event definition.
	 */
	list_splice_tail(list_event, list_all);
1498
	free(list_event);
1499 1500
}

1501 1502 1503 1504 1505 1506
struct event_modifier {
	int eu;
	int ek;
	int eh;
	int eH;
	int eG;
1507
	int eI;
1508
	int precise;
1509
	int precise_max;
1510
	int exclude_GH;
1511
	int sample_read;
1512
	int pinned;
1513
	int weak;
1514 1515 1516 1517
};

static int get_event_modifier(struct event_modifier *mod, char *str,
			       struct perf_evsel *evsel)
1518
{
1519 1520 1521 1522 1523
	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;
1524
	int eI = evsel ? evsel->attr.exclude_idle : 0;
1525
	int precise = evsel ? evsel->attr.precise_ip : 0;
1526
	int precise_max = 0;
1527
	int sample_read = 0;
1528
	int pinned = evsel ? evsel->attr.pinned : 0;
1529

1530 1531
	int exclude = eu | ek | eh;
	int exclude_GH = evsel ? evsel->exclude_GH : 0;
1532
	int weak = 0;
1533 1534

	memset(mod, 0, sizeof(*mod));
1535

1536
	while (*str) {
P
Peter Zijlstra 已提交
1537 1538 1539
		if (*str == 'u') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1540
			eu = 0;
P
Peter Zijlstra 已提交
1541 1542 1543
		} else if (*str == 'k') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1544
			ek = 0;
P
Peter Zijlstra 已提交
1545 1546 1547
		} else if (*str == 'h') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1548
			eh = 0;
1549 1550 1551 1552 1553 1554 1555 1556
		} 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;
1557 1558
		} else if (*str == 'I') {
			eI = 1;
P
Peter Zijlstra 已提交
1559 1560
		} else if (*str == 'p') {
			precise++;
1561 1562 1563
			/* use of precise requires exclude_guest */
			if (!exclude_GH)
				eG = 1;
1564 1565
		} else if (*str == 'P') {
			precise_max = 1;
1566 1567
		} else if (*str == 'S') {
			sample_read = 1;
1568 1569
		} else if (*str == 'D') {
			pinned = 1;
1570 1571
		} else if (*str == 'W') {
			weak = 1;
P
Peter Zijlstra 已提交
1572
		} else
1573
			break;
P
Peter Zijlstra 已提交
1574

1575
		++str;
1576
	}
1577

1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589
	/*
	 * 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;
1590

1591 1592 1593 1594 1595
	mod->eu = eu;
	mod->ek = ek;
	mod->eh = eh;
	mod->eH = eH;
	mod->eG = eG;
1596
	mod->eI = eI;
1597
	mod->precise = precise;
1598
	mod->precise_max = precise_max;
1599
	mod->exclude_GH = exclude_GH;
1600
	mod->sample_read = sample_read;
1601
	mod->pinned = pinned;
1602
	mod->weak = weak;
1603

1604 1605 1606
	return 0;
}

1607 1608 1609 1610 1611 1612 1613 1614 1615
/*
 * 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. */
1616
	if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627
		return -1;

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

	return 0;
}

1628 1629 1630 1631 1632 1633 1634 1635
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;

1636 1637 1638
	if (check_modifier(str))
		return -EINVAL;

1639 1640 1641
	if (!add && get_event_modifier(&mod, str, NULL))
		return -EINVAL;

1642
	__evlist__for_each_entry(list, evsel) {
1643 1644 1645 1646 1647 1648 1649 1650 1651
		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;
1652
		evsel->attr.exclude_idle   = mod.eI;
1653
		evsel->exclude_GH          = mod.exclude_GH;
1654
		evsel->sample_read         = mod.sample_read;
1655
		evsel->precise_max         = mod.precise_max;
1656
		evsel->weak_group	   = mod.weak;
1657 1658 1659

		if (perf_evsel__is_group_leader(evsel))
			evsel->attr.pinned = mod.pinned;
1660
	}
1661

1662 1663
	return 0;
}
1664

1665 1666 1667 1668
int parse_events_name(struct list_head *list, char *name)
{
	struct perf_evsel *evsel;

1669
	__evlist__for_each_entry(list, evsel) {
1670 1671 1672 1673 1674 1675 1676
		if (!evsel->name)
			evsel->name = strdup(name);
	}

	return 0;
}

1677 1678 1679 1680 1681 1682
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;

1683
	return strcasecmp(pmu1->symbol, pmu2->symbol);
1684 1685 1686 1687 1688 1689 1690 1691 1692 1693
}

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;
1694
			zfree(&p->symbol);
1695
		}
1696
		zfree(&perf_pmu_events_list);
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719
		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;

1720 1721 1722 1723 1724 1725 1726 1727 1728 1729
	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) {
1730 1731 1732 1733 1734 1735 1736 1737 1738
		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;
1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754
	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++;
			}
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
		}
	}
	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);
1785
	zfree(&p.symbol);
1786 1787 1788
	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
}

1789
static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1790
{
1791
	YY_BUFFER_STATE buffer;
1792
	void *scanner;
1793
	int ret;
1794

1795
	ret = parse_events_lex_init_extra(start_token, &scanner);
1796 1797 1798 1799
	if (ret)
		return ret;

	buffer = parse_events__scan_string(str, scanner);
1800

1801 1802 1803
#ifdef PARSER_DEBUG
	parse_events_debug = 1;
#endif
1804
	ret = parse_events_parse(parse_state, scanner);
1805 1806 1807 1808 1809 1810

	parse_events__flush_buffer(buffer, scanner);
	parse_events__delete_buffer(buffer, scanner);
	parse_events_lex_destroy(scanner);
	return ret;
}
1811

1812 1813 1814 1815 1816
/*
 * parse event config string, return a list of event terms.
 */
int parse_events_terms(struct list_head *terms, const char *str)
{
1817
	struct parse_events_state parse_state = {
1818 1819 1820 1821
		.terms = NULL,
	};
	int ret;

1822
	ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1823
	if (!ret) {
1824 1825
		list_splice(parse_state.terms, terms);
		zfree(&parse_state.terms);
1826 1827 1828
		return 0;
	}

1829
	parse_events_terms__delete(parse_state.terms);
1830 1831 1832
	return ret;
}

1833 1834
int parse_events(struct perf_evlist *evlist, const char *str,
		 struct parse_events_error *err)
1835
{
1836 1837
	struct parse_events_state parse_state = {
		.list   = LIST_HEAD_INIT(parse_state.list),
1838 1839 1840
		.idx    = evlist->nr_entries,
		.error  = err,
		.evlist = evlist,
1841 1842
	};
	int ret;
1843

1844
	ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1845
	perf_pmu__parse_cleanup();
1846
	if (!ret) {
1847 1848
		struct perf_evsel *last;

1849
		if (list_empty(&parse_state.list)) {
1850
			WARN_ONCE(true, "WARNING: event parser found nothing\n");
1851 1852 1853
			return -1;
		}

1854 1855
		perf_evlist__splice_list_tail(evlist, &parse_state.list);
		evlist->nr_groups += parse_state.nr_groups;
1856 1857 1858
		last = perf_evlist__last(evlist);
		last->cmdline_group_boundary = true;

1859 1860
		return 0;
	}
1861

1862 1863 1864 1865 1866
	/*
	 * 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.
	 */
1867
	return ret;
1868 1869
}

1870 1871 1872 1873 1874 1875 1876 1877 1878
#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;
}

1879 1880
void parse_events_print_error(struct parse_events_error *err,
			      const char *event)
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
{
	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.
		 */
1897
		int max_err_idx = 13;
1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908

		/*
		 * 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;

1909
		/* We're cutting from the beginning. */
1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931
		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);
1932 1933
		zfree(&err->str);
		zfree(&err->help);
1934 1935 1936 1937 1938
	}
}

#undef MAX_WIDTH

1939
int parse_events_option(const struct option *opt, const char *str,
1940
			int unset __maybe_unused)
1941 1942
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1943 1944 1945
	struct parse_events_error err = { .idx = 0, };
	int ret = parse_events(evlist, str, &err);

1946
	if (ret) {
1947
		parse_events_print_error(&err, str);
1948 1949
		fprintf(stderr, "Run 'perf list' for a list of valid events\n");
	}
1950 1951

	return ret;
1952 1953
}

1954 1955 1956 1957 1958
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
1959
{
1960
	struct perf_evsel *last = NULL;
1961
	int err;
L
Li Zefan 已提交
1962

1963 1964 1965 1966 1967 1968
	/*
	 * 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.
	 */
1969
	if (evlist->nr_entries > 0)
1970
		last = perf_evlist__last(evlist);
1971

1972
	do {
1973 1974
		err = (*func)(last, arg);
		if (err)
1975
			return -1;
1976 1977
		if (!last)
			return 0;
1978 1979 1980 1981 1982

		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
1983 1984 1985 1986

	return 0;
}

1987 1988 1989
static int set_filter(struct perf_evsel *evsel, const void *arg)
{
	const char *str = arg;
1990 1991 1992
	bool found = false;
	int nr_addr_filters = 0;
	struct perf_pmu *pmu = NULL;
1993

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
	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;
2005 2006
	}

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	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) {
2021 2022 2023 2024 2025 2026
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
2027 2028 2029 2030 2031 2032

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

	return -1;
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056
}

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());

2057
	if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
		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);
}

2076 2077 2078 2079 2080
static const char * const event_type_descriptors[] = {
	"Hardware event",
	"Software event",
	"Tracepoint event",
	"Hardware cache event",
2081 2082
	"Raw hardware event descriptor",
	"Hardware breakpoint",
2083 2084
};

2085 2086 2087 2088 2089 2090 2091 2092
static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;

	return strcmp(*as, *bs);
}

2093 2094 2095 2096
/*
 * Print the events from <debugfs_mount_point>/tracing/events
 */

2097 2098
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
			     bool name_only)
2099 2100
{
	DIR *sys_dir, *evt_dir;
2101
	struct dirent *sys_dirent, *evt_dirent;
2102
	char evt_path[MAXPATHLEN];
2103
	char *dir_path;
2104 2105 2106
	char **evt_list = NULL;
	unsigned int evt_i = 0, evt_num = 0;
	bool evt_num_known = false;
2107

2108
restart:
2109
	sys_dir = tracing_events__opendir();
2110
	if (!sys_dir)
E
Eric Dumazet 已提交
2111
		return;
2112

2113 2114 2115 2116 2117 2118
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_close_sys_dir;
	}

2119
	for_each_subsystem(sys_dir, sys_dirent) {
2120
		if (subsys_glob != NULL &&
2121
		    !strglobmatch(sys_dirent->d_name, subsys_glob))
2122
			continue;
E
Eric Dumazet 已提交
2123

2124 2125 2126
		dir_path = get_events_file(sys_dirent->d_name);
		if (!dir_path)
			continue;
E
Eric Dumazet 已提交
2127 2128
		evt_dir = opendir(dir_path);
		if (!evt_dir)
2129
			goto next;
E
Eric Dumazet 已提交
2130

2131
		for_each_event(dir_path, evt_dir, evt_dirent) {
2132
			if (event_glob != NULL &&
2133
			    !strglobmatch(evt_dirent->d_name, event_glob))
2134 2135
				continue;

2136 2137
			if (!evt_num_known) {
				evt_num++;
2138 2139 2140
				continue;
			}

2141
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2142
				 sys_dirent->d_name, evt_dirent->d_name);
2143 2144

			evt_list[evt_i] = strdup(evt_path);
2145 2146
			if (evt_list[evt_i] == NULL) {
				put_events_file(dir_path);
2147
				goto out_close_evt_dir;
2148
			}
2149
			evt_i++;
2150 2151
		}
		closedir(evt_dir);
2152 2153
next:
		put_events_file(dir_path);
2154 2155
	}
	closedir(sys_dir);
2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170

	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]);
	}
2171
	if (evt_num && pager_in_use())
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189
		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;
2190 2191
}

2192 2193 2194 2195 2196 2197 2198
/*
 * Check whether event is in <debugfs_mount_point>/tracing/events
 */

int is_valid_tracepoint(const char *event_string)
{
	DIR *sys_dir, *evt_dir;
2199
	struct dirent *sys_dirent, *evt_dirent;
2200
	char evt_path[MAXPATHLEN];
2201
	char *dir_path;
2202

2203
	sys_dir = tracing_events__opendir();
2204 2205 2206
	if (!sys_dir)
		return 0;

2207
	for_each_subsystem(sys_dir, sys_dirent) {
2208 2209 2210
		dir_path = get_events_file(sys_dirent->d_name);
		if (!dir_path)
			continue;
2211 2212
		evt_dir = opendir(dir_path);
		if (!evt_dir)
2213
			goto next;
2214

2215
		for_each_event(dir_path, evt_dir, evt_dirent) {
2216
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2217
				 sys_dirent->d_name, evt_dirent->d_name);
2218 2219 2220 2221 2222 2223 2224
			if (!strcmp(evt_path, event_string)) {
				closedir(evt_dir);
				closedir(sys_dir);
				return 1;
			}
		}
		closedir(evt_dir);
2225 2226
next:
		put_events_file(dir_path);
2227 2228 2229 2230 2231
	}
	closedir(sys_dir);
	return 0;
}

2232 2233 2234
static bool is_event_supported(u8 type, unsigned config)
{
	bool ret = true;
2235
	int open_return;
2236 2237 2238 2239 2240 2241
	struct perf_evsel *evsel;
	struct perf_event_attr attr = {
		.type = type,
		.config = config,
		.disabled = 1,
	};
2242 2243 2244 2245
	struct thread_map *tmap = thread_map__new_by_tid(0);

	if (tmap == NULL)
		return false;
2246

2247
	evsel = perf_evsel__new(&attr);
2248
	if (evsel) {
2249
		open_return = perf_evsel__open(evsel, NULL, tmap);
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260
		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;
2261
			ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2262
		}
2263 2264 2265 2266 2267 2268
		perf_evsel__delete(evsel);
	}

	return ret;
}

2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291
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) {
2292
		pcache = probe_cache__new(nd->s, NULL);
2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347
		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);
}

2348
int print_hwcache_events(const char *event_glob, bool name_only)
2349
{
2350
	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2351
	char name[64];
2352 2353 2354 2355 2356 2357 2358 2359 2360
	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;
	}
2361 2362 2363 2364

	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 */
2365
			if (!perf_evsel__is_cache_op_valid(type, op))
2366 2367 2368
				continue;

			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2369 2370
				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
									name, sizeof(name));
2371
				if (event_glob != NULL && !strglobmatch(name, event_glob))
2372 2373
					continue;

2374 2375 2376 2377
				if (!is_event_supported(PERF_TYPE_HW_CACHE,
							type | (op << 8) | (i << 16)))
					continue;

2378 2379 2380 2381 2382 2383 2384 2385 2386
				if (!evt_num_known) {
					evt_num++;
					continue;
				}

				evt_list[evt_i] = strdup(name);
				if (evt_list[evt_i] == NULL)
					goto out_enomem;
				evt_i++;
2387 2388 2389 2390
			}
		}
	}

2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404
	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]);
	}
2405
	if (evt_num && pager_in_use())
2406
		printf("\n");
2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419

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;
2420 2421
}

2422
void print_symbol_events(const char *event_glob, unsigned type,
2423 2424
				struct event_symbol *syms, unsigned max,
				bool name_only)
2425
{
2426
	unsigned int i, evt_i = 0, evt_num = 0;
2427
	char name[MAX_NAME_LEN];
2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
	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;
	}
2438

2439
	for (i = 0; i < max; i++, syms++) {
2440

2441
		if (event_glob != NULL && syms->symbol != NULL &&
2442 2443 2444
		    !(strglobmatch(syms->symbol, event_glob) ||
		      (syms->alias && strglobmatch(syms->alias, event_glob))))
			continue;
2445

2446 2447 2448
		if (!is_event_supported(type, i))
			continue;

2449 2450
		if (!evt_num_known) {
			evt_num++;
2451 2452 2453
			continue;
		}

2454
		if (!name_only && strlen(syms->alias))
2455
			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2456
		else
2457
			strncpy(name, syms->symbol, MAX_NAME_LEN);
2458

2459 2460 2461 2462
		evt_list[evt_i] = strdup(name);
		if (evt_list[evt_i] == NULL)
			goto out_enomem;
		evt_i++;
2463 2464
	}

2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477
	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]);
	}
2478
	if (evt_num && pager_in_use())
2479
		printf("\n");
2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491

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;
2492 2493 2494 2495 2496
}

/*
 * Print the help text for the event symbols:
 */
2497
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2498
			bool long_desc, bool details_flag)
2499 2500
{
	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2501
			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2502 2503

	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2504
			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2505

2506
	print_hwcache_events(event_glob, name_only);
2507

2508 2509
	print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
			details_flag);
2510

2511 2512
	if (event_glob != NULL)
		return;
2513

2514 2515 2516 2517 2518 2519 2520
	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]);
2521 2522
		if (pager_in_use())
			printf("   (see 'man perf-list' on how to encode it)\n\n");
2523 2524

		printf("  %-50s [%s]\n",
2525
		       "mem:<addr>[/len][:access]",
2526
			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2527 2528
		if (pager_in_use())
			printf("\n");
2529
	}
2530

2531
	print_tracepoint_events(NULL, NULL, name_only);
2532 2533

	print_sdt_events(NULL, NULL, name_only);
2534 2535

	metricgroup__print(true, true, NULL, name_only);
2536
}
2537

2538
int parse_events__is_hardcoded_term(struct parse_events_term *term)
2539
{
2540
	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2541 2542
}

2543 2544 2545
static int new_term(struct parse_events_term **_term,
		    struct parse_events_term *temp,
		    char *str, u64 num)
2546
{
2547
	struct parse_events_term *term;
2548

2549
	term = malloc(sizeof(*term));
2550 2551 2552
	if (!term)
		return -ENOMEM;

2553
	*term = *temp;
2554
	INIT_LIST_HEAD(&term->list);
2555
	term->weak = false;
2556

2557
	switch (term->type_val) {
2558 2559 2560 2561 2562 2563 2564
	case PARSE_EVENTS__TERM_TYPE_NUM:
		term->val.num = num;
		break;
	case PARSE_EVENTS__TERM_TYPE_STR:
		term->val.str = str;
		break;
	default:
2565
		free(term);
2566 2567 2568 2569 2570 2571 2572
		return -EINVAL;
	}

	*_term = term;
	return 0;
}

2573
int parse_events_term__num(struct parse_events_term **term,
2574
			   int type_term, char *config, u64 num,
2575
			   bool no_value,
2576
			   void *loc_term_, void *loc_val_)
2577
{
2578 2579 2580
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2581 2582 2583 2584
	struct parse_events_term temp = {
		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
		.type_term = type_term,
		.config    = config,
2585
		.no_value  = no_value,
2586 2587 2588 2589 2590
		.err_term  = loc_term ? loc_term->first_column : 0,
		.err_val   = loc_val  ? loc_val->first_column  : 0,
	};

	return new_term(term, &temp, NULL, num);
2591 2592
}

2593
int parse_events_term__str(struct parse_events_term **term,
2594
			   int type_term, char *config, char *str,
2595
			   void *loc_term_, void *loc_val_)
2596
{
2597 2598 2599
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2600 2601 2602 2603 2604 2605 2606 2607 2608
	struct parse_events_term temp = {
		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
		.type_term = type_term,
		.config    = config,
		.err_term  = loc_term ? loc_term->first_column : 0,
		.err_val   = loc_val  ? loc_val->first_column  : 0,
	};

	return new_term(term, &temp, str, 0);
2609 2610
}

2611
int parse_events_term__sym_hw(struct parse_events_term **term,
2612 2613 2614
			      char *config, unsigned idx)
{
	struct event_symbol *sym;
2615 2616 2617 2618 2619
	struct parse_events_term temp = {
		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
		.config    = config ?: (char *) "event",
	};
2620 2621 2622 2623

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

2624
	return new_term(term, &temp, (char *) sym->symbol, 0);
2625 2626
}

2627 2628
int parse_events_term__clone(struct parse_events_term **new,
			     struct parse_events_term *term)
2629
{
2630 2631 2632 2633 2634 2635 2636 2637 2638
	struct parse_events_term temp = {
		.type_val  = term->type_val,
		.type_term = term->type_term,
		.config    = term->config,
		.err_term  = term->err_term,
		.err_val   = term->err_val,
	};

	return new_term(new, &temp, term->val.str, term->val.num);
2639 2640
}

2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665
int parse_events_copy_term_list(struct list_head *old,
				 struct list_head **new)
{
	struct parse_events_term *term, *n;
	int ret;

	if (!old) {
		*new = NULL;
		return 0;
	}

	*new = malloc(sizeof(struct list_head));
	if (!*new)
		return -ENOMEM;
	INIT_LIST_HEAD(*new);

	list_for_each_entry (term, old, list) {
		ret = parse_events_term__clone(&n, term);
		if (ret)
			return ret;
		list_add_tail(&n->list, *new);
	}
	return 0;
}

2666
void parse_events_terms__purge(struct list_head *terms)
2667
{
2668
	struct parse_events_term *term, *h;
2669

2670
	list_for_each_entry_safe(term, h, terms, list) {
2671
		if (term->array.nr_ranges)
2672
			zfree(&term->array.ranges);
2673
		list_del_init(&term->list);
2674
		free(term);
2675
	}
2676
}
2677

2678
void parse_events_terms__delete(struct list_head *terms)
2679
{
2680 2681
	if (!terms)
		return;
2682
	parse_events_terms__purge(terms);
2683
	free(terms);
2684 2685
}

2686 2687
void parse_events__clear_array(struct parse_events_array *a)
{
2688
	zfree(&a->ranges);
2689 2690
}

2691
void parse_events_evlist_error(struct parse_events_state *parse_state,
2692 2693
			       int idx, const char *str)
{
2694
	struct parse_events_error *err = parse_state->error;
2695

2696 2697
	if (!err)
		return;
2698 2699 2700 2701
	err->idx = idx;
	err->str = strdup(str);
	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
}
2702

2703 2704 2705 2706 2707 2708 2709 2710 2711
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];

2712 2713
		if (!config_term_avail(i, NULL))
			continue;
2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729
		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);
	}
}

2730 2731 2732 2733 2734 2735 2736
/*
 * 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
2737
	/* "no-overwrite" is the longest name */
2738
	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
W
Wang Nan 已提交
2739
			  (sizeof("no-overwrite") - 1)];
2740

2741
	config_terms_list(static_terms, sizeof(static_terms));
2742 2743
	/* valid terms */
	if (additional_terms) {
2744 2745
		if (asprintf(&str, "valid terms: %s,%s",
			     additional_terms, static_terms) < 0)
2746 2747
			goto fail;
	} else {
2748
		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2749 2750 2751 2752 2753 2754 2755
			goto fail;
	}
	return str;

fail:
	return NULL;
}