xref: /linux/tools/perf/util/evlist.h (revision 04eeb606a8383b306f4bc6991da8231b5f3924b0)
1 #ifndef __PERF_EVLIST_H
2 #define __PERF_EVLIST_H 1
3 
4 #include <linux/list.h>
5 #include <api/fd/array.h>
6 #include <stdio.h>
7 #include "../perf.h"
8 #include "event.h"
9 #include "evsel.h"
10 #include "util.h"
11 #include <unistd.h>
12 
13 struct pollfd;
14 struct thread_map;
15 struct cpu_map;
16 struct record_opts;
17 
18 #define PERF_EVLIST__HLIST_BITS 8
19 #define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
20 
21 /**
22  * struct perf_mmap - perf's ring buffer mmap details
23  *
24  * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
25  */
26 struct perf_mmap {
27 	void		 *base;
28 	int		 mask;
29 	int		 refcnt;
30 	unsigned int	 prev;
31 	char		 event_copy[PERF_SAMPLE_MAX_SIZE];
32 };
33 
34 struct perf_evlist {
35 	struct list_head entries;
36 	struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
37 	int		 nr_entries;
38 	int		 nr_groups;
39 	int		 nr_mmaps;
40 	size_t		 mmap_len;
41 	int		 id_pos;
42 	int		 is_pos;
43 	u64		 combined_sample_type;
44 	struct {
45 		int	cork_fd;
46 		pid_t	pid;
47 	} workload;
48 	bool		 overwrite;
49 	struct fdarray	 pollfd;
50 	struct perf_mmap *mmap;
51 	struct thread_map *threads;
52 	struct cpu_map	  *cpus;
53 	struct perf_evsel *selected;
54 };
55 
56 struct perf_evsel_str_handler {
57 	const char *name;
58 	void	   *handler;
59 };
60 
61 struct perf_evlist *perf_evlist__new(void);
62 struct perf_evlist *perf_evlist__new_default(void);
63 void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
64 		       struct thread_map *threads);
65 void perf_evlist__exit(struct perf_evlist *evlist);
66 void perf_evlist__delete(struct perf_evlist *evlist);
67 
68 void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);
69 int perf_evlist__add_default(struct perf_evlist *evlist);
70 int __perf_evlist__add_default_attrs(struct perf_evlist *evlist,
71 				     struct perf_event_attr *attrs, size_t nr_attrs);
72 
73 #define perf_evlist__add_default_attrs(evlist, array) \
74 	__perf_evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array))
75 
76 int perf_evlist__add_newtp(struct perf_evlist *evlist,
77 			   const char *sys, const char *name, void *handler);
78 
79 int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter);
80 
81 struct perf_evsel *
82 perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id);
83 
84 struct perf_evsel *
85 perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist,
86 				     const char *name);
87 
88 void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
89 			 int cpu, int thread, u64 id);
90 
91 int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd);
92 int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
93 int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask);
94 
95 int perf_evlist__poll(struct perf_evlist *evlist, int timeout);
96 
97 struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
98 
99 struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
100 
101 union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx);
102 
103 void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx);
104 
105 int perf_evlist__open(struct perf_evlist *evlist);
106 void perf_evlist__close(struct perf_evlist *evlist);
107 
108 void perf_evlist__set_id_pos(struct perf_evlist *evlist);
109 bool perf_can_sample_identifier(void);
110 void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts);
111 int record_opts__config(struct record_opts *opts);
112 
113 int perf_evlist__prepare_workload(struct perf_evlist *evlist,
114 				  struct target *target,
115 				  const char *argv[], bool pipe_output,
116 				  void (*exec_error)(int signo, siginfo_t *info,
117 						     void *ucontext));
118 int perf_evlist__start_workload(struct perf_evlist *evlist);
119 
120 struct option;
121 
122 int perf_evlist__parse_mmap_pages(const struct option *opt,
123 				  const char *str,
124 				  int unset);
125 
126 int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
127 		      bool overwrite);
128 void perf_evlist__munmap(struct perf_evlist *evlist);
129 
130 void perf_evlist__disable(struct perf_evlist *evlist);
131 void perf_evlist__enable(struct perf_evlist *evlist);
132 
133 int perf_evlist__disable_event(struct perf_evlist *evlist,
134 			       struct perf_evsel *evsel);
135 int perf_evlist__enable_event(struct perf_evlist *evlist,
136 			      struct perf_evsel *evsel);
137 int perf_evlist__enable_event_idx(struct perf_evlist *evlist,
138 				  struct perf_evsel *evsel, int idx);
139 
140 void perf_evlist__set_selected(struct perf_evlist *evlist,
141 			       struct perf_evsel *evsel);
142 
143 static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
144 					 struct cpu_map *cpus,
145 					 struct thread_map *threads)
146 {
147 	evlist->cpus	= cpus;
148 	evlist->threads	= threads;
149 }
150 
151 int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target);
152 int perf_evlist__apply_filters(struct perf_evlist *evlist);
153 
154 void __perf_evlist__set_leader(struct list_head *list);
155 void perf_evlist__set_leader(struct perf_evlist *evlist);
156 
157 u64 perf_evlist__read_format(struct perf_evlist *evlist);
158 u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist);
159 u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist);
160 bool perf_evlist__sample_id_all(struct perf_evlist *evlist);
161 u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
162 
163 int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
164 			      struct perf_sample *sample);
165 
166 bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);
167 bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);
168 bool perf_evlist__valid_read_format(struct perf_evlist *evlist);
169 
170 void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
171 				   struct list_head *list,
172 				   int nr_entries);
173 
174 static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
175 {
176 	return list_entry(evlist->entries.next, struct perf_evsel, node);
177 }
178 
179 static inline struct perf_evsel *perf_evlist__last(struct perf_evlist *evlist)
180 {
181 	return list_entry(evlist->entries.prev, struct perf_evsel, node);
182 }
183 
184 size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
185 
186 int perf_evlist__strerror_tp(struct perf_evlist *evlist, int err, char *buf, size_t size);
187 int perf_evlist__strerror_open(struct perf_evlist *evlist, int err, char *buf, size_t size);
188 
189 static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
190 {
191 	struct perf_event_mmap_page *pc = mm->base;
192 	int head = ACCESS_ONCE(pc->data_head);
193 	rmb();
194 	return head;
195 }
196 
197 static inline void perf_mmap__write_tail(struct perf_mmap *md,
198 					 unsigned long tail)
199 {
200 	struct perf_event_mmap_page *pc = md->base;
201 
202 	/*
203 	 * ensure all reads are done before we write the tail out.
204 	 */
205 	mb();
206 	pc->data_tail = tail;
207 }
208 
209 bool perf_evlist__can_select_event(struct perf_evlist *evlist, const char *str);
210 void perf_evlist__to_front(struct perf_evlist *evlist,
211 			   struct perf_evsel *move_evsel);
212 
213 /**
214  * __evlist__for_each - iterate thru all the evsels
215  * @list: list_head instance to iterate
216  * @evsel: struct evsel iterator
217  */
218 #define __evlist__for_each(list, evsel) \
219         list_for_each_entry(evsel, list, node)
220 
221 /**
222  * evlist__for_each - iterate thru all the evsels
223  * @evlist: evlist instance to iterate
224  * @evsel: struct evsel iterator
225  */
226 #define evlist__for_each(evlist, evsel) \
227 	__evlist__for_each(&(evlist)->entries, evsel)
228 
229 /**
230  * __evlist__for_each_continue - continue iteration thru all the evsels
231  * @list: list_head instance to iterate
232  * @evsel: struct evsel iterator
233  */
234 #define __evlist__for_each_continue(list, evsel) \
235         list_for_each_entry_continue(evsel, list, node)
236 
237 /**
238  * evlist__for_each_continue - continue iteration thru all the evsels
239  * @evlist: evlist instance to iterate
240  * @evsel: struct evsel iterator
241  */
242 #define evlist__for_each_continue(evlist, evsel) \
243 	__evlist__for_each_continue(&(evlist)->entries, evsel)
244 
245 /**
246  * __evlist__for_each_reverse - iterate thru all the evsels in reverse order
247  * @list: list_head instance to iterate
248  * @evsel: struct evsel iterator
249  */
250 #define __evlist__for_each_reverse(list, evsel) \
251         list_for_each_entry_reverse(evsel, list, node)
252 
253 /**
254  * evlist__for_each_reverse - iterate thru all the evsels in reverse order
255  * @evlist: evlist instance to iterate
256  * @evsel: struct evsel iterator
257  */
258 #define evlist__for_each_reverse(evlist, evsel) \
259 	__evlist__for_each_reverse(&(evlist)->entries, evsel)
260 
261 /**
262  * __evlist__for_each_safe - safely iterate thru all the evsels
263  * @list: list_head instance to iterate
264  * @tmp: struct evsel temp iterator
265  * @evsel: struct evsel iterator
266  */
267 #define __evlist__for_each_safe(list, tmp, evsel) \
268         list_for_each_entry_safe(evsel, tmp, list, node)
269 
270 /**
271  * evlist__for_each_safe - safely iterate thru all the evsels
272  * @evlist: evlist instance to iterate
273  * @evsel: struct evsel iterator
274  * @tmp: struct evsel temp iterator
275  */
276 #define evlist__for_each_safe(evlist, tmp, evsel) \
277 	__evlist__for_each_safe(&(evlist)->entries, tmp, evsel)
278 
279 void perf_evlist__set_tracking_event(struct perf_evlist *evlist,
280 				     struct perf_evsel *tracking_evsel);
281 
282 #endif /* __PERF_EVLIST_H */
283