tools/perf/util/evsel.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_EVSEL_H
#define __PERF_EVSEL_H 1

#include <stdbool.h>

#include <linux/list.h>
#include <linux/perf_event.h>
#include <linux/refcount.h>
#include <linux/types.h>
#include <sys/types.h>

#include <internal/evsel.h>
#include <perf/evsel.h>

#include "symbol_conf.h"

struct bperf_follower_bpf;
struct bperf_leader_bpf;
struct bpf_counter_ops;
struct bpf_object;
struct cgroup;
struct hashmap;
struct perf_counts;
struct perf_pmu;
struct perf_stat_config;
struct perf_stat_evsel;
struct target;
union perf_event;

typedef int (evsel__sb_cb_t)(union perf_event *event, void *data);

/** struct evsel - event selector
 *
 * @evlist - evlist this evsel is in, if it is in one.
 * @core - libperf evsel object
 * @name - Can be set to retain the original event name passed by the user,
 *         so that when showing results in tools such as 'perf stat', we
 *         show the name used, not some alias.
 * @id_pos: the position of the event id (PERF_SAMPLE_ID or
 *          PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of
 *          struct perf_record_sample
 * @is_pos: the position (counting backwards) of the event id (PERF_SAMPLE_ID or
 *          PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if sample_id_all
 *          is used there is an id sample appended to non-sample events
 * @priv:   And what is in its containing unnamed union are tool specific
 */
struct evsel {
	struct perf_evsel	core;
	struct evlist		*evlist;
	refcount_t		refcnt;
	off_t			id_offset;
	int			id_pos;
	int			is_pos;
	unsigned int		sample_size;

	/*
	 * These fields can be set in the parse-events code or similar.
	 * Please check evsel__clone() to copy them properly so that
	 * they can be released properly.
	 */
	struct {
		char			*name;
		char			*group_name;
		const char		*group_pmu_name;
#ifdef HAVE_LIBTRACEEVENT
		char			*tp_sys;
		char			*tp_name;
		struct tep_event	*tp_format;
#endif
		char			*filter;
		unsigned long		max_events;
		double			scale;
		const char		*unit;
		struct cgroup		*cgrp;
		const char		*metric_id;

		/* The PMU the event is from. Used for missing_features, PMU name, etc. */
		struct perf_pmu		*pmu;

		/*
		 * This point to the first evsel with the same name, intended to store the
		 * aggregated counts in aggregation mode.
		 */
		struct evsel		*first_wildcard_match;
		/* parse modifier helper */
		int			exclude_GH;
		int			sample_read;
		bool			snapshot;
		bool			per_pkg;
		bool			percore;
		bool			precise_max;
		bool			is_libpfm_event;
		bool			collect_stat;
		bool			weak_group;
		bool			bpf_counter;
		bool			use_config_name;
		bool			skippable;
		bool			retire_lat;
		bool			dont_regroup;
		bool			default_metricgroup; /* A member of the Default metricgroup */
		bool			default_show_events; /* If a default group member, show the event */
		struct list_head	config_terms;
		u64			alternate_hw_config;
	};

	/*
	 * metric fields are similar, but needs more care as they can have
	 * references to other metric (evsel).
	 */
	struct evsel		*metric_leader;

	void			*handler;
	struct perf_counts	*counts;
	struct perf_counts	*prev_raw_counts;
	unsigned long		nr_events_printed;
	struct perf_stat_evsel  *stats;
	void			*priv;
	u64			db_id;
	bool			uniquified_name;
	bool 			supported;
	bool 			needs_swap;
	bool 			disabled;
	bool			no_aux_samples;
	bool			immediate;
	bool			tracking;
	bool			ignore_missing_thread;
	bool			forced_leader;
	bool			cmdline_group_boundary;
	bool			reset_group;
	bool			needs_auxtrace_mmap;
	bool			needs_uniquify;
	bool			fallenback_eacces;
	bool			fallenback_eopnotsupp;
	u8			probe_type:3;
	struct hashmap		*per_pkg_mask;
	int			err;
	int			script_output_type;
	struct {
		evsel__sb_cb_t	*cb;
		void		*data;
	} side_band;
	/*
	 * For reporting purposes, an evsel sample can have a callchain
	 * synthesized from AUX area data. Keep track of synthesized sample
	 * types here. Note, the recorded sample_type cannot be changed because
	 * it is needed to continue to parse events.
	 * See also evsel__has_callchain().
	 */
	__u64			synth_sample_type;

	/*
	 * Store the branch counter related information.
	 * br_cntr_idx: The idx of the branch counter event in the evlist
	 * br_cntr_nr:  The number of the branch counter event in the group
	 *	        (Only available for the leader event)
	 * abbr_name:   The abbreviation name assigned to an event which is
	 *		logged by the branch counter.
	 *		The abbr name is from A to Z9. NA is applied if out
	 *		of the range.
	 */
	int			br_cntr_idx;
	int			br_cntr_nr;
	char			abbr_name[3];

	/*
	 * bpf_counter_ops serves two use cases:
	 *   1. perf-stat -b          counting events used byBPF programs
	 *   2. perf-stat --use-bpf   use BPF programs to aggregate counts
	 */
	struct bpf_counter_ops	*bpf_counter_ops;

	struct list_head	bpf_counter_list; /* for perf-stat -b */
	struct list_head	bpf_filters; /* for perf-record --filter */

	/* for perf-stat --use-bpf */
	int			bperf_leader_prog_fd;
	int			bperf_leader_link_fd;
	union {
		struct bperf_leader_bpf *leader_skel;
		struct bperf_follower_bpf *follower_skel;
		void *bpf_skel;
	};
	unsigned long		open_flags;
	int			precise_ip_original;

	/* For tool events */
	/* Beginning time subtracted when the counter is read. */
	union {
		/* Defaults for retirement latency events. */
		struct _retirement_latency {
			double mean;
			double min;
			double max;
		} retirement_latency;
		/* duration_time is a single global time. */
		struct {
			__u64 start_time;
			__u64 accumulated_time;
		} duration_time;
		/*
		 * user_time and system_time read an initial value potentially
		 * per-CPU or per-pid.
		 */
		struct {
			struct xyarray *start_times;
			struct xyarray *accumulated_times;
		} process_time;
	};
	/* Is the tool's fd for /proc/pid/stat or /proc/stat. */
	bool pid_stat;
};

struct perf_missing_features {
	bool sample_id_all;
	bool exclude_guest;
	bool mmap2;
	bool cloexec;
	bool clockid;
	bool clockid_wrong;
	bool lbr_flags;
	bool write_backward;
	bool group_read;
	bool ksymbol;
	bool bpf;
	bool aux_output;
	bool branch_hw_idx;
	bool cgroup;
	bool data_page_size;
	bool code_page_size;
	bool weight_struct;
	bool read_lost;
	bool branch_counters;
	bool aux_action;
	bool inherit_sample_read;
	bool defer_callchain;
};

extern struct perf_missing_features perf_missing_features;

struct perf_cpu_map;
struct thread_map;
struct record_opts;

static inline struct perf_cpu_map *evsel__cpus(struct evsel *evsel)
{
	return perf_evsel__cpus(&evsel->core);
}

static inline int evsel__nr_cpus(struct evsel *evsel)
{
	return perf_cpu_map__nr(evsel__cpus(evsel));
}

void evsel__compute_deltas(struct evsel *evsel, int cpu, int thread,
			   struct perf_counts_values *count);

int evsel__object_config(size_t object_size,
			 int (*init)(struct evsel *evsel),
			 void (*fini)(struct evsel *evsel));

struct perf_pmu *evsel__find_pmu(const struct evsel *evsel);
const char *evsel__pmu_name(const struct evsel *evsel);
bool evsel__is_aux_event(const struct evsel *evsel);

bool evsel__is_probe(struct evsel *evsel);
bool evsel__is_kprobe(struct evsel *evsel);
bool evsel__is_uprobe(struct evsel *evsel);

struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx);

static inline struct evsel *evsel__new(struct perf_event_attr *attr)
{
	return evsel__new_idx(attr, 0);
}

struct evsel *evsel__clone(struct evsel *orig);

int copy_config_terms(struct list_head *dst, struct list_head *src);
void free_config_terms(struct list_head *config_terms);


/*
 * Returns pointer with encoded error via <linux/err.h> interface.
 */
struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx, bool format);
static inline struct evsel *evsel__newtp(const char *sys, const char *name)
{
	return evsel__newtp_idx(sys, name, 0, true);
}

struct evsel *evsel__get(struct evsel *evsel);
void evsel__put(struct evsel *evsel);

#ifdef HAVE_LIBTRACEEVENT
struct tep_event *evsel__tp_format(struct evsel *evsel);
#endif

void evsel__set_priv_destructor(void (*destructor)(void *priv));

struct callchain_param;

void evsel__config(struct evsel *evsel, const struct record_opts *opts,
		   const struct callchain_param *callchain);
void evsel__config_callchain(struct evsel *evsel, const struct record_opts *opts,
			     const  struct callchain_param *callchain);

int __evsel__sample_size(u64 sample_type);
void evsel__calc_id_pos(struct evsel *evsel);

bool evsel__is_cache_op_valid(u8 type, u8 op);

static inline bool evsel__is_bpf(struct evsel *evsel)
{
	return evsel->bpf_counter_ops != NULL;
}

static inline bool evsel__is_bperf(struct evsel *evsel)
{
	return evsel->bpf_counter_ops != NULL && list_empty(&evsel->bpf_counter_list);
}

#define EVSEL__MAX_ALIASES 8

extern const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES];
extern const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES];
extern const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES];
extern const char *const evsel__hw_names[PERF_COUNT_HW_MAX];
extern const char *const evsel__sw_names[PERF_COUNT_SW_MAX];
extern char *evsel__bpf_counter_events;
bool evsel__match_bpf_counter_events(const char *name);
int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size);

int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size);
const char *evsel__name(struct evsel *evsel);
bool evsel__name_is(struct evsel *evsel, const char *name);
const char *evsel__metric_id(const struct evsel *evsel);

static inline bool evsel__is_retire_lat(const struct evsel *evsel)
{
	return evsel->retire_lat;
}

const char *evsel__group_name(struct evsel *evsel);
int evsel__group_desc(struct evsel *evsel, char *buf, size_t size);

void __evsel__set_sample_bit(struct evsel *evsel, enum perf_event_sample_format bit);
void __evsel__reset_sample_bit(struct evsel *evsel, enum perf_event_sample_format bit);

#define evsel__set_sample_bit(evsel, bit) \
	__evsel__set_sample_bit(evsel, PERF_SAMPLE_##bit)

#define evsel__reset_sample_bit(evsel, bit) \
	__evsel__reset_sample_bit(evsel, PERF_SAMPLE_##bit)

void evsel__set_sample_id(struct evsel *evsel, bool use_sample_identifier);

void arch_evsel__set_sample_weight(struct evsel *evsel);
void arch__post_evsel_config(struct evsel *evsel, struct perf_event_attr *attr);
int arch_evsel__open_strerror(struct evsel *evsel, int err, char *msg, size_t size);
void arch_evsel__apply_ratio_to_prev(struct evsel *evsel, struct perf_event_attr *attr);

int evsel__set_filter(struct evsel *evsel, const char *filter);
int evsel__append_tp_filter(struct evsel *evsel, const char *filter);
int evsel__append_addr_filter(struct evsel *evsel, const char *filter);

int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx);
int evsel__enable(struct evsel *evsel);
int evsel__disable(struct evsel *evsel);
int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx);

int evsel__open_per_cpu_and_thread(struct evsel *evsel,
				   struct perf_cpu_map *cpus, int cpu_map_idx,
				   struct perf_thread_map *threads);
int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx);
int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads);
int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
		struct perf_thread_map *threads);
void evsel__close(struct evsel *evsel);
int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
		struct perf_thread_map *threads);

bool evsel__precise_ip_fallback(struct evsel *evsel);

struct perf_sample;

#ifdef HAVE_LIBTRACEEVENT
void *perf_sample__rawptr(struct perf_sample *sample, const char *name);
u64 perf_sample__intval(struct perf_sample *sample, const char *name);
u64 perf_sample__intval_common(struct perf_sample *sample, const char *name);
char perf_sample__taskstate(struct perf_sample *sample, const char *name);

static inline char *perf_sample__strval(struct perf_sample *sample, const char *name)
{
	return perf_sample__rawptr(sample, name);
}
#endif

struct tep_format_field;

void *format_field__get_raw_data(struct tep_format_field *field,
				 struct perf_sample *sample,
				 bool needs_swap, u16 *len_out);
unsigned long *format_field__get_cpumask(struct tep_format_field *field,
					 struct perf_sample *sample,
					 bool needs_swap, u16 *len_out);
u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample, bool needs_swap);

#ifdef HAVE_LIBTRACEEVENT
struct tep_format_field *evsel__field(struct evsel *evsel, const char *name);
struct tep_format_field *evsel__common_field(struct evsel *evsel, const char *name);
#else
static inline struct tep_format_field *
evsel__field(struct evsel *evsel __maybe_unused, const char *name __maybe_unused)
{
	return NULL;
}

static inline struct tep_format_field *
evsel__common_field(struct evsel *evsel __maybe_unused, const char *name __maybe_unused)
{
	return NULL;
}
#endif

bool __evsel__match(const struct evsel *evsel, u32 type, u64 config);

#define evsel__match(evsel, t, c) __evsel__match(evsel, PERF_TYPE_##t, PERF_COUNT_##c)

int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread);

int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale);

/**
 * evsel__read_on_cpu - Read out the results on a CPU and thread
 *
 * @evsel - event selector to read value
 * @cpu_map_idx - CPU of interest
 * @thread - thread of interest
 */
static inline int evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread)
{
	return __evsel__read_on_cpu(evsel, cpu_map_idx, thread, false);
}

/**
 * evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 *
 * @evsel - event selector to read value
 * @cpu_map_idx - CPU of interest
 * @thread - thread of interest
 */
static inline int evsel__read_on_cpu_scaled(struct evsel *evsel, int cpu_map_idx, int thread)
{
	return __evsel__read_on_cpu(evsel, cpu_map_idx, thread, true);
}

int __evsel__parse_sample(struct evsel *evsel, union perf_event *event,
			  struct perf_sample *data, bool needs_swap);

static inline int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
				      struct perf_sample *data)
{
	return __evsel__parse_sample(evsel, event, data, evsel->needs_swap);
}

int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
				  u64 *timestamp);

u16 evsel__id_hdr_size(const struct evsel *evsel);

static inline struct evsel *evsel__next(struct evsel *evsel)
{
	return list_entry(evsel->core.node.next, struct evsel, core.node);
}

static inline struct evsel *evsel__prev(struct evsel *evsel)
{
	return list_entry(evsel->core.node.prev, struct evsel, core.node);
}

/**
 * evsel__is_group_leader - Return whether given evsel is a leader event
 *
 * @evsel - evsel selector to be tested
 *
 * Return %true if @evsel is a group leader or a stand-alone event
 */
static inline bool evsel__is_group_leader(const struct evsel *evsel)
{
	return evsel->core.leader == &evsel->core;
}

/**
 * evsel__is_group_event - Return whether given evsel is a group event
 *
 * @evsel - evsel selector to be tested
 *
 * Return %true iff event group view is enabled and @evsel is a actual group
 * leader which has other members in the group
 */
static inline bool evsel__is_group_event(struct evsel *evsel)
{
	if (!symbol_conf.event_group)
		return false;

	return evsel__is_group_leader(evsel) && evsel->core.nr_members > 1;
}

bool evsel__is_non_perf_event_open_pmu(const struct evsel *evsel);
bool evsel__is_function_event(struct evsel *evsel);

static inline bool evsel__is_bpf_output(struct evsel *evsel)
{
	return evsel__match(evsel, SOFTWARE, SW_BPF_OUTPUT);
}

static inline bool evsel__is_clock(const struct evsel *evsel)
{
	return evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
	       evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK);
}

bool evsel__fallback(struct evsel *evsel, struct target *target, int err,
		     char *msg, size_t msgsize);
int evsel__open_strerror(struct evsel *evsel, struct target *target,
			 int err, char *msg, size_t size);

static inline int evsel__group_idx(struct evsel *evsel)
{
	return evsel->core.idx - evsel->core.leader->idx;
}

/* Iterates group WITHOUT the leader. */
#define for_each_group_member_head(_evsel, _leader, _head)				\
for ((_evsel) = list_entry((_leader)->core.node.next, struct evsel, core.node);		\
	(_evsel) && &(_evsel)->core.node != (_head) &&					\
	(_evsel)->core.leader == &(_leader)->core;					\
	(_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))

#define for_each_group_member(_evsel, _leader)				\
	for_each_group_member_head(_evsel, _leader, &evlist__core((_leader)->evlist)->entries)

/* Iterates group WITH the leader. */
#define for_each_group_evsel_head(_evsel, _leader, _head)				\
for ((_evsel) = _leader;								\
	(_evsel) && &(_evsel)->core.node != (_head) &&					\
	(_evsel)->core.leader == &(_leader)->core;					\
	(_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))

#define for_each_group_evsel(_evsel, _leader)				\
	for_each_group_evsel_head(_evsel, _leader, &evlist__core((_leader)->evlist)->entries)

static inline bool evsel__has_branch_callstack(const struct evsel *evsel)
{
	return evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK;
}

static inline bool evsel__has_branch_hw_idx(const struct evsel *evsel)
{
	return evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX;
}

static inline bool evsel__has_callchain(const struct evsel *evsel)
{
	/*
	 * For reporting purposes, an evsel sample can have a recorded callchain
	 * or a callchain synthesized from AUX area data.
	 */
	return evsel->core.attr.sample_type & PERF_SAMPLE_CALLCHAIN ||
	       evsel->synth_sample_type & PERF_SAMPLE_CALLCHAIN;
}

static inline bool evsel__has_br_stack(const struct evsel *evsel)
{
	/*
	 * For reporting purposes, an evsel sample can have a recorded branch
	 * stack or a branch stack synthesized from AUX area data.
	 */
	return evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK ||
	       evsel->synth_sample_type & PERF_SAMPLE_BRANCH_STACK;
}

static inline bool evsel__is_dummy_event(struct evsel *evsel)
{
	return (evsel->core.attr.type == PERF_TYPE_SOFTWARE) &&
	       (evsel->core.attr.config == PERF_COUNT_SW_DUMMY);
}

struct perf_session *evsel__session(struct evsel *evsel);
struct perf_env *evsel__env(struct evsel *evsel);
uint16_t evsel__e_machine(struct evsel *evsel, uint32_t *e_flags);

int evsel__store_ids(struct evsel *evsel, struct evlist *evlist);

void evsel__zero_per_pkg(struct evsel *evsel);
bool evsel__is_hybrid(const struct evsel *evsel);
struct evsel *evsel__leader(const struct evsel *evsel);
bool evsel__has_leader(struct evsel *evsel, struct evsel *leader);
bool evsel__is_leader(struct evsel *evsel);
void evsel__set_leader(struct evsel *evsel, struct evsel *leader);
int evsel__source_count(const struct evsel *evsel);
void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader);

bool arch_evsel__must_be_in_group(const struct evsel *evsel);

bool evsel__set_needs_uniquify(struct evsel *counter, const struct perf_stat_config *config);
void evsel__uniquify_counter(struct evsel *counter);

/*
 * Macro to swap the bit-field postition and size.
 * Used when,
 * - dont need to swap the entire u64 &&
 * - when u64 has variable bit-field sizes &&
 * - when presented in a host endian which is different
 *   than the source endian of the perf.data file
 */
#define bitfield_swap(src, pos, size)	\
	((((src) >> (pos)) & ((1ull << (size)) - 1)) << (63 - ((pos) + (size) - 1)))

u64 evsel__bitfield_swap_branch_flags(u64 value);
bool evsel__config_exists(const struct evsel *evsel, const char *config_name);
int evsel__get_config_val(const struct evsel *evsel, const char *config_name,
			  u64 *val);
void evsel__set_config_if_unset(struct evsel *evsel, const char *config_name,
				u64 val);

bool evsel__is_offcpu_event(struct evsel *evsel);

void evsel__warn_user_requested_cpus(struct evsel *evsel, struct perf_cpu_map *user_requested_cpus);

#endif /* __PERF_EVSEL_H */