1 files changed, 394 insertions, 0 deletions
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
new file mode 100644
index 000000000..9298fce53
--- /dev/null
+++ b/tools/perf/util/evlist.h
@@ -0,0 +1,394 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_EVLIST_H
+#define __PERF_EVLIST_H 1
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/refcount.h>
+#include <linux/list.h>
+#include <api/fd/array.h>
+#include <internal/evlist.h>
+#include <internal/evsel.h>
+#include "events_stats.h"
+#include "evsel.h"
+#include <pthread.h>
+#include <signal.h>
+#include <unistd.h>
+
+struct pollfd;
+struct thread_map;
+struct perf_cpu_map;
+struct record_opts;
+
+/*
+ * State machine of bkw_mmap_state:
+ *
+ *                     .________________(forbid)_____________.
+ *                     |                                     V
+ * NOTREADY --(0)--> RUNNING --(1)--> DATA_PENDING --(2)--> EMPTY
+ *                     ^  ^              |   ^               |
+ *                     |  |__(forbid)____/   |___(forbid)___/|
+ *                     |                                     |
+ *                      \_________________(3)_______________/
+ *
+ * NOTREADY     : Backward ring buffers are not ready
+ * RUNNING      : Backward ring buffers are recording
+ * DATA_PENDING : We are required to collect data from backward ring buffers
+ * EMPTY        : We have collected data from backward ring buffers.
+ *
+ * (0): Setup backward ring buffer
+ * (1): Pause ring buffers for reading
+ * (2): Read from ring buffers
+ * (3): Resume ring buffers for recording
+ */
+enum bkw_mmap_state {
+	BKW_MMAP_NOTREADY,
+	BKW_MMAP_RUNNING,
+	BKW_MMAP_DATA_PENDING,
+	BKW_MMAP_EMPTY,
+};
+
+struct evlist {
+	struct perf_evlist core;
+	int		 nr_groups;
+	bool		 enabled;
+	int		 id_pos;
+	int		 is_pos;
+	u64		 combined_sample_type;
+	enum bkw_mmap_state bkw_mmap_state;
+	struct {
+		int	cork_fd;
+		pid_t	pid;
+	} workload;
+	struct mmap *mmap;
+	struct mmap *overwrite_mmap;
+	struct evsel *selected;
+	struct events_stats stats;
+	struct perf_env	*env;
+	void (*trace_event_sample_raw)(struct evlist *evlist,
+				       union perf_event *event,
+				       struct perf_sample *sample);
+	u64		first_sample_time;
+	u64		last_sample_time;
+	struct {
+		pthread_t		th;
+		volatile int		done;
+	} thread;
+	struct {
+		int	fd;	/* control file descriptor */
+		int	ack;	/* ack file descriptor for control commands */
+		int	pos;	/* index at evlist core object to check signals */
+	} ctl_fd;
+};
+
+struct evsel_str_handler {
+	const char *name;
+	void	   *handler;
+};
+
+struct evlist *evlist__new(void);
+struct evlist *perf_evlist__new_default(void);
+struct evlist *perf_evlist__new_dummy(void);
+void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
+		  struct perf_thread_map *threads);
+void evlist__exit(struct evlist *evlist);
+void evlist__delete(struct evlist *evlist);
+
+void evlist__add(struct evlist *evlist, struct evsel *entry);
+void evlist__remove(struct evlist *evlist, struct evsel *evsel);
+
+int __evlist__add_default(struct evlist *evlist, bool precise);
+
+static inline int evlist__add_default(struct evlist *evlist)
+{
+	return __evlist__add_default(evlist, true);
+}
+
+int __evlist__add_default_attrs(struct evlist *evlist,
+				     struct perf_event_attr *attrs, size_t nr_attrs);
+
+#define evlist__add_default_attrs(evlist, array) \
+	__evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array))
+
+int evlist__add_dummy(struct evlist *evlist);
+
+int perf_evlist__add_sb_event(struct evlist *evlist,
+			      struct perf_event_attr *attr,
+			      evsel__sb_cb_t cb,
+			      void *data);
+void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data);
+int perf_evlist__start_sb_thread(struct evlist *evlist,
+				 struct target *target);
+void perf_evlist__stop_sb_thread(struct evlist *evlist);
+
+int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler);
+
+int __evlist__set_tracepoints_handlers(struct evlist *evlist,
+				       const struct evsel_str_handler *assocs,
+				       size_t nr_assocs);
+
+#define evlist__set_tracepoints_handlers(evlist, array) \
+	__evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array))
+
+void __perf_evlist__set_sample_bit(struct evlist *evlist,
+				   enum perf_event_sample_format bit);
+void __perf_evlist__reset_sample_bit(struct evlist *evlist,
+				     enum perf_event_sample_format bit);
+
+#define perf_evlist__set_sample_bit(evlist, bit) \
+	__perf_evlist__set_sample_bit(evlist, PERF_SAMPLE_##bit)
+
+#define perf_evlist__reset_sample_bit(evlist, bit) \
+	__perf_evlist__reset_sample_bit(evlist, PERF_SAMPLE_##bit)
+
+int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter);
+int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid);
+int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids);
+
+int perf_evlist__append_tp_filter(struct evlist *evlist, const char *filter);
+
+int perf_evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid);
+int perf_evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids);
+
+struct evsel *
+perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id);
+
+struct evsel *
+perf_evlist__find_tracepoint_by_name(struct evlist *evlist,
+				     const char *name);
+
+int evlist__add_pollfd(struct evlist *evlist, int fd);
+int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask);
+
+#ifdef HAVE_EVENTFD_SUPPORT
+int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd);
+#endif
+
+int evlist__poll(struct evlist *evlist, int timeout);
+
+struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id);
+struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist,
+						u64 id);
+
+struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id);
+
+void perf_evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state);
+
+void evlist__mmap_consume(struct evlist *evlist, int idx);
+
+int evlist__open(struct evlist *evlist);
+void evlist__close(struct evlist *evlist);
+
+struct callchain_param;
+
+void perf_evlist__set_id_pos(struct evlist *evlist);
+void perf_evlist__config(struct evlist *evlist, struct record_opts *opts,
+			 struct callchain_param *callchain);
+int record_opts__config(struct record_opts *opts);
+
+int perf_evlist__prepare_workload(struct evlist *evlist,
+				  struct target *target,
+				  const char *argv[], bool pipe_output,
+				  void (*exec_error)(int signo, siginfo_t *info,
+						     void *ucontext));
+int perf_evlist__start_workload(struct evlist *evlist);
+
+struct option;
+
+int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str);
+int perf_evlist__parse_mmap_pages(const struct option *opt,
+				  const char *str,
+				  int unset);
+
+unsigned long perf_event_mlock_kb_in_pages(void);
+
+int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
+			 unsigned int auxtrace_pages,
+			 bool auxtrace_overwrite, int nr_cblocks,
+			 int affinity, int flush, int comp_level);
+int evlist__mmap(struct evlist *evlist, unsigned int pages);
+void evlist__munmap(struct evlist *evlist);
+
+size_t evlist__mmap_size(unsigned long pages);
+
+void evlist__disable(struct evlist *evlist);
+void evlist__enable(struct evlist *evlist);
+void perf_evlist__toggle_enable(struct evlist *evlist);
+
+int perf_evlist__enable_event_idx(struct evlist *evlist,
+				  struct evsel *evsel, int idx);
+
+void perf_evlist__set_selected(struct evlist *evlist,
+			       struct evsel *evsel);
+
+int perf_evlist__create_maps(struct evlist *evlist, struct target *target);
+int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel);
+
+void __perf_evlist__set_leader(struct list_head *list);
+void perf_evlist__set_leader(struct evlist *evlist);
+
+u64 __evlist__combined_sample_type(struct evlist *evlist);
+u64 evlist__combined_sample_type(struct evlist *evlist);
+u64 evlist__combined_branch_type(struct evlist *evlist);
+bool evlist__sample_id_all(struct evlist *evlist);
+u16 perf_evlist__id_hdr_size(struct evlist *evlist);
+
+int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event,
+			      struct perf_sample *sample);
+
+int perf_evlist__parse_sample_timestamp(struct evlist *evlist,
+					union perf_event *event,
+					u64 *timestamp);
+
+bool evlist__valid_sample_type(struct evlist *evlist);
+bool evlist__valid_sample_id_all(struct evlist *evlist);
+bool perf_evlist__valid_read_format(struct evlist *evlist);
+
+void perf_evlist__splice_list_tail(struct evlist *evlist,
+				   struct list_head *list);
+
+static inline bool perf_evlist__empty(struct evlist *evlist)
+{
+	return list_empty(&evlist->core.entries);
+}
+
+static inline struct evsel *evlist__first(struct evlist *evlist)
+{
+	struct perf_evsel *evsel = perf_evlist__first(&evlist->core);
+
+	return container_of(evsel, struct evsel, core);
+}
+
+static inline struct evsel *evlist__last(struct evlist *evlist)
+{
+	struct perf_evsel *evsel = perf_evlist__last(&evlist->core);
+
+	return container_of(evsel, struct evsel, core);
+}
+
+int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size);
+int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size);
+
+bool perf_evlist__can_select_event(struct evlist *evlist, const char *str);
+void perf_evlist__to_front(struct evlist *evlist,
+			   struct evsel *move_evsel);
+
+/**
+ * __evlist__for_each_entry - iterate thru all the evsels
+ * @list: list_head instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define __evlist__for_each_entry(list, evsel) \
+        list_for_each_entry(evsel, list, core.node)
+
+/**
+ * evlist__for_each_entry - iterate thru all the evsels
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define evlist__for_each_entry(evlist, evsel) \
+	__evlist__for_each_entry(&(evlist)->core.entries, evsel)
+
+/**
+ * __evlist__for_each_entry_continue - continue iteration thru all the evsels
+ * @list: list_head instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define __evlist__for_each_entry_continue(list, evsel) \
+        list_for_each_entry_continue(evsel, list, core.node)
+
+/**
+ * evlist__for_each_entry_continue - continue iteration thru all the evsels
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define evlist__for_each_entry_continue(evlist, evsel) \
+	__evlist__for_each_entry_continue(&(evlist)->core.entries, evsel)
+
+/**
+ * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order
+ * @list: list_head instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define __evlist__for_each_entry_reverse(list, evsel) \
+        list_for_each_entry_reverse(evsel, list, core.node)
+
+/**
+ * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ */
+#define evlist__for_each_entry_reverse(evlist, evsel) \
+	__evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel)
+
+/**
+ * __evlist__for_each_entry_safe - safely iterate thru all the evsels
+ * @list: list_head instance to iterate
+ * @tmp: struct evsel temp iterator
+ * @evsel: struct evsel iterator
+ */
+#define __evlist__for_each_entry_safe(list, tmp, evsel) \
+        list_for_each_entry_safe(evsel, tmp, list, core.node)
+
+/**
+ * evlist__for_each_entry_safe - safely iterate thru all the evsels
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ * @tmp: struct evsel temp iterator
+ */
+#define evlist__for_each_entry_safe(evlist, tmp, evsel) \
+	__evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel)
+
+#define evlist__for_each_cpu(evlist, index, cpu)	\
+	evlist__cpu_iter_start(evlist);			\
+	perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus)
+
+struct evsel *perf_evlist__get_tracking_event(struct evlist *evlist);
+void perf_evlist__set_tracking_event(struct evlist *evlist,
+				     struct evsel *tracking_evsel);
+
+void evlist__cpu_iter_start(struct evlist *evlist);
+bool evsel__cpu_iter_skip(struct evsel *ev, int cpu);
+bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu);
+
+struct evsel *
+perf_evlist__find_evsel_by_str(struct evlist *evlist, const char *str);
+
+struct evsel *perf_evlist__event2evsel(struct evlist *evlist,
+					    union perf_event *event);
+
+bool perf_evlist__exclude_kernel(struct evlist *evlist);
+
+void perf_evlist__force_leader(struct evlist *evlist);
+
+struct evsel *perf_evlist__reset_weak_group(struct evlist *evlist,
+						 struct evsel *evsel,
+						bool close);
+#define EVLIST_CTL_CMD_ENABLE_TAG  "enable"
+#define EVLIST_CTL_CMD_DISABLE_TAG "disable"
+#define EVLIST_CTL_CMD_ACK_TAG     "ack\n"
+#define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot"
+
+#define EVLIST_CTL_CMD_MAX_LEN 64
+
+enum evlist_ctl_cmd {
+	EVLIST_CTL_CMD_UNSUPPORTED = 0,
+	EVLIST_CTL_CMD_ENABLE,
+	EVLIST_CTL_CMD_DISABLE,
+	EVLIST_CTL_CMD_ACK,
+	EVLIST_CTL_CMD_SNAPSHOT,
+};
+
+int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close);
+void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close);
+int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack);
+int evlist__finalize_ctlfd(struct evlist *evlist);
+bool evlist__ctlfd_initialized(struct evlist *evlist);
+int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd);
+int evlist__ctlfd_ack(struct evlist *evlist);
+
+#define EVLIST_ENABLED_MSG "Events enabled\n"
+#define EVLIST_DISABLED_MSG "Events disabled\n"
+
+struct evsel *evlist__find_evsel(struct evlist *evlist, int idx);
+#endif /* __PERF_EVLIST_H */