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1// SPDX-License-Identifier: GPL-2.0
2#define _GNU_SOURCE // needed for sched.h to get sched_[gs]etaffinity and CPU_(ZERO,SET)
3#include <sched.h>
4#include <stdio.h>
5#include <stdarg.h>
6#include <unistd.h>
7#include <stdlib.h>
8#include <linux/perf_event.h>
9#include <linux/limits.h>
10#include <sys/types.h>
11#include <sys/wait.h>
12#include <sys/prctl.h>
13#include <perf/cpumap.h>
14#include <perf/threadmap.h>
15#include <perf/evlist.h>
16#include <perf/evsel.h>
17#include <perf/mmap.h>
18#include <perf/event.h>
19#include <internal/tests.h>
20#include <api/fs/fs.h>
21#include "tests.h"
22#include <internal/evsel.h>
23
24static int libperf_print(enum libperf_print_level level,
25 const char *fmt, va_list ap)
26{
27 return vfprintf(stderr, fmt, ap);
28}
29
30static int test_stat_cpu(void)
31{
32 struct perf_cpu_map *cpus;
33 struct perf_evlist *evlist;
34 struct perf_evsel *evsel, *leader;
35 struct perf_event_attr attr1 = {
36 .type = PERF_TYPE_SOFTWARE,
37 .config = PERF_COUNT_SW_CPU_CLOCK,
38 };
39 struct perf_event_attr attr2 = {
40 .type = PERF_TYPE_SOFTWARE,
41 .config = PERF_COUNT_SW_TASK_CLOCK,
42 };
43 int err, idx;
44
45 cpus = perf_cpu_map__new(NULL);
46 __T("failed to create cpus", cpus);
47
48 evlist = perf_evlist__new();
49 __T("failed to create evlist", evlist);
50
51 evsel = leader = perf_evsel__new(&attr1);
52 __T("failed to create evsel1", evsel);
53
54 perf_evlist__add(evlist, evsel);
55
56 evsel = perf_evsel__new(&attr2);
57 __T("failed to create evsel2", evsel);
58
59 perf_evlist__add(evlist, evsel);
60
61 perf_evlist__set_leader(evlist);
62 __T("failed to set leader", leader->leader == leader);
63 __T("failed to set leader", evsel->leader == leader);
64
65 perf_evlist__set_maps(evlist, cpus, NULL);
66
67 err = perf_evlist__open(evlist);
68 __T("failed to open evsel", err == 0);
69
70 perf_evlist__for_each_evsel(evlist, evsel) {
71 cpus = perf_evsel__cpus(evsel);
72
73 for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) {
74 struct perf_counts_values counts = { .val = 0 };
75
76 perf_evsel__read(evsel, idx, 0, &counts);
77 __T("failed to read value for evsel", counts.val != 0);
78 }
79 }
80
81 perf_evlist__close(evlist);
82 perf_evlist__delete(evlist);
83
84 perf_cpu_map__put(cpus);
85 return 0;
86}
87
88static int test_stat_thread(void)
89{
90 struct perf_counts_values counts = { .val = 0 };
91 struct perf_thread_map *threads;
92 struct perf_evlist *evlist;
93 struct perf_evsel *evsel, *leader;
94 struct perf_event_attr attr1 = {
95 .type = PERF_TYPE_SOFTWARE,
96 .config = PERF_COUNT_SW_CPU_CLOCK,
97 };
98 struct perf_event_attr attr2 = {
99 .type = PERF_TYPE_SOFTWARE,
100 .config = PERF_COUNT_SW_TASK_CLOCK,
101 };
102 int err;
103
104 threads = perf_thread_map__new_dummy();
105 __T("failed to create threads", threads);
106
107 perf_thread_map__set_pid(threads, 0, 0);
108
109 evlist = perf_evlist__new();
110 __T("failed to create evlist", evlist);
111
112 evsel = leader = perf_evsel__new(&attr1);
113 __T("failed to create evsel1", evsel);
114
115 perf_evlist__add(evlist, evsel);
116
117 evsel = perf_evsel__new(&attr2);
118 __T("failed to create evsel2", evsel);
119
120 perf_evlist__add(evlist, evsel);
121
122 perf_evlist__set_leader(evlist);
123 __T("failed to set leader", leader->leader == leader);
124 __T("failed to set leader", evsel->leader == leader);
125
126 perf_evlist__set_maps(evlist, NULL, threads);
127
128 err = perf_evlist__open(evlist);
129 __T("failed to open evsel", err == 0);
130
131 perf_evlist__for_each_evsel(evlist, evsel) {
132 perf_evsel__read(evsel, 0, 0, &counts);
133 __T("failed to read value for evsel", counts.val != 0);
134 }
135
136 perf_evlist__close(evlist);
137 perf_evlist__delete(evlist);
138
139 perf_thread_map__put(threads);
140 return 0;
141}
142
143static int test_stat_thread_enable(void)
144{
145 struct perf_counts_values counts = { .val = 0 };
146 struct perf_thread_map *threads;
147 struct perf_evlist *evlist;
148 struct perf_evsel *evsel, *leader;
149 struct perf_event_attr attr1 = {
150 .type = PERF_TYPE_SOFTWARE,
151 .config = PERF_COUNT_SW_CPU_CLOCK,
152 .disabled = 1,
153 };
154 struct perf_event_attr attr2 = {
155 .type = PERF_TYPE_SOFTWARE,
156 .config = PERF_COUNT_SW_TASK_CLOCK,
157 .disabled = 1,
158 };
159 int err;
160
161 threads = perf_thread_map__new_dummy();
162 __T("failed to create threads", threads);
163
164 perf_thread_map__set_pid(threads, 0, 0);
165
166 evlist = perf_evlist__new();
167 __T("failed to create evlist", evlist);
168
169 evsel = leader = perf_evsel__new(&attr1);
170 __T("failed to create evsel1", evsel);
171
172 perf_evlist__add(evlist, evsel);
173
174 evsel = perf_evsel__new(&attr2);
175 __T("failed to create evsel2", evsel);
176
177 perf_evlist__add(evlist, evsel);
178
179 perf_evlist__set_leader(evlist);
180 __T("failed to set leader", leader->leader == leader);
181 __T("failed to set leader", evsel->leader == leader);
182
183 perf_evlist__set_maps(evlist, NULL, threads);
184
185 err = perf_evlist__open(evlist);
186 __T("failed to open evsel", err == 0);
187
188 perf_evlist__for_each_evsel(evlist, evsel) {
189 perf_evsel__read(evsel, 0, 0, &counts);
190 __T("failed to read value for evsel", counts.val == 0);
191 }
192
193 perf_evlist__enable(evlist);
194
195 perf_evlist__for_each_evsel(evlist, evsel) {
196 perf_evsel__read(evsel, 0, 0, &counts);
197 __T("failed to read value for evsel", counts.val != 0);
198 }
199
200 perf_evlist__disable(evlist);
201
202 perf_evlist__close(evlist);
203 perf_evlist__delete(evlist);
204
205 perf_thread_map__put(threads);
206 return 0;
207}
208
209static int test_mmap_thread(void)
210{
211 struct perf_evlist *evlist;
212 struct perf_evsel *evsel;
213 struct perf_mmap *map;
214 struct perf_cpu_map *cpus;
215 struct perf_thread_map *threads;
216 struct perf_event_attr attr = {
217 .type = PERF_TYPE_TRACEPOINT,
218 .sample_period = 1,
219 .wakeup_watermark = 1,
220 .disabled = 1,
221 };
222 char path[PATH_MAX];
223 int id, err, pid, go_pipe[2];
224 union perf_event *event;
225 int count = 0;
226
227 snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
228 sysfs__mountpoint());
229
230 if (filename__read_int(path, &id)) {
231 tests_failed++;
232 fprintf(stderr, "error: failed to get tracepoint id: %s\n", path);
233 return -1;
234 }
235
236 attr.config = id;
237
238 err = pipe(go_pipe);
239 __T("failed to create pipe", err == 0);
240
241 fflush(NULL);
242
243 pid = fork();
244 if (!pid) {
245 int i;
246 char bf;
247
248 read(go_pipe[0], &bf, 1);
249
250 /* Generate 100 prctl calls. */
251 for (i = 0; i < 100; i++)
252 prctl(0, 0, 0, 0, 0);
253
254 exit(0);
255 }
256
257 threads = perf_thread_map__new_dummy();
258 __T("failed to create threads", threads);
259
260 cpus = perf_cpu_map__dummy_new();
261 __T("failed to create cpus", cpus);
262
263 perf_thread_map__set_pid(threads, 0, pid);
264
265 evlist = perf_evlist__new();
266 __T("failed to create evlist", evlist);
267
268 evsel = perf_evsel__new(&attr);
269 __T("failed to create evsel1", evsel);
270 __T("failed to set leader", evsel->leader == evsel);
271
272 perf_evlist__add(evlist, evsel);
273
274 perf_evlist__set_maps(evlist, cpus, threads);
275
276 err = perf_evlist__open(evlist);
277 __T("failed to open evlist", err == 0);
278
279 err = perf_evlist__mmap(evlist, 4);
280 __T("failed to mmap evlist", err == 0);
281
282 perf_evlist__enable(evlist);
283
284 /* kick the child and wait for it to finish */
285 write(go_pipe[1], "A", 1);
286 waitpid(pid, NULL, 0);
287
288 /*
289 * There's no need to call perf_evlist__disable,
290 * monitored process is dead now.
291 */
292
293 perf_evlist__for_each_mmap(evlist, map, false) {
294 if (perf_mmap__read_init(map) < 0)
295 continue;
296
297 while ((event = perf_mmap__read_event(map)) != NULL) {
298 count++;
299 perf_mmap__consume(map);
300 }
301
302 perf_mmap__read_done(map);
303 }
304
305 /* calls perf_evlist__munmap/perf_evlist__close */
306 perf_evlist__delete(evlist);
307
308 perf_thread_map__put(threads);
309 perf_cpu_map__put(cpus);
310
311 /*
312 * The generated prctl calls should match the
313 * number of events in the buffer.
314 */
315 __T("failed count", count == 100);
316
317 return 0;
318}
319
320static int test_mmap_cpus(void)
321{
322 struct perf_evlist *evlist;
323 struct perf_evsel *evsel;
324 struct perf_mmap *map;
325 struct perf_cpu_map *cpus;
326 struct perf_event_attr attr = {
327 .type = PERF_TYPE_TRACEPOINT,
328 .sample_period = 1,
329 .wakeup_watermark = 1,
330 .disabled = 1,
331 };
332 cpu_set_t saved_mask;
333 char path[PATH_MAX];
334 int id, err, cpu, tmp;
335 union perf_event *event;
336 int count = 0;
337
338 snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
339 sysfs__mountpoint());
340
341 if (filename__read_int(path, &id)) {
342 fprintf(stderr, "error: failed to get tracepoint id: %s\n", path);
343 return -1;
344 }
345
346 attr.config = id;
347
348 cpus = perf_cpu_map__new(NULL);
349 __T("failed to create cpus", cpus);
350
351 evlist = perf_evlist__new();
352 __T("failed to create evlist", evlist);
353
354 evsel = perf_evsel__new(&attr);
355 __T("failed to create evsel1", evsel);
356 __T("failed to set leader", evsel->leader == evsel);
357
358 perf_evlist__add(evlist, evsel);
359
360 perf_evlist__set_maps(evlist, cpus, NULL);
361
362 err = perf_evlist__open(evlist);
363 __T("failed to open evlist", err == 0);
364
365 err = perf_evlist__mmap(evlist, 4);
366 __T("failed to mmap evlist", err == 0);
367
368 perf_evlist__enable(evlist);
369
370 err = sched_getaffinity(0, sizeof(saved_mask), &saved_mask);
371 __T("sched_getaffinity failed", err == 0);
372
373 perf_cpu_map__for_each_cpu(cpu, tmp, cpus) {
374 cpu_set_t mask;
375
376 CPU_ZERO(&mask);
377 CPU_SET(cpu, &mask);
378
379 err = sched_setaffinity(0, sizeof(mask), &mask);
380 __T("sched_setaffinity failed", err == 0);
381
382 prctl(0, 0, 0, 0, 0);
383 }
384
385 err = sched_setaffinity(0, sizeof(saved_mask), &saved_mask);
386 __T("sched_setaffinity failed", err == 0);
387
388 perf_evlist__disable(evlist);
389
390 perf_evlist__for_each_mmap(evlist, map, false) {
391 if (perf_mmap__read_init(map) < 0)
392 continue;
393
394 while ((event = perf_mmap__read_event(map)) != NULL) {
395 count++;
396 perf_mmap__consume(map);
397 }
398
399 perf_mmap__read_done(map);
400 }
401
402 /* calls perf_evlist__munmap/perf_evlist__close */
403 perf_evlist__delete(evlist);
404
405 /*
406 * The generated prctl events should match the
407 * number of cpus or be bigger (we are system-wide).
408 */
409 __T("failed count", count >= perf_cpu_map__nr(cpus));
410
411 perf_cpu_map__put(cpus);
412
413 return 0;
414}
415
416int test_evlist(int argc, char **argv)
417{
418 __T_START;
419
420 libperf_init(libperf_print);
421
422 test_stat_cpu();
423 test_stat_thread();
424 test_stat_thread_enable();
425 test_mmap_thread();
426 test_mmap_cpus();
427
428 __T_END;
429 return tests_failed == 0 ? 0 : -1;
430}