Commit | Line | Data |
---|---|---|
234fbbf5 | 1 | #include <linux/types.h> |
7ef80703 | 2 | #include <sys/mman.h> |
234fbbf5 ACM |
3 | #include "event.h" |
4 | #include "debug.h" | |
b3cef7f6 | 5 | #include "hist.h" |
f62d3f0f | 6 | #include "machine.h" |
c410a338 | 7 | #include "sort.h" |
234fbbf5 | 8 | #include "string.h" |
c410a338 | 9 | #include "strlist.h" |
62daacb5 | 10 | #include "thread.h" |
7c940c18 | 11 | #include "thread_map.h" |
c506c96b | 12 | #include "symbol/kallsyms.h" |
234fbbf5 | 13 | |
8115d60c | 14 | static const char *perf_event__names[] = { |
3cb6d154 FW |
15 | [0] = "TOTAL", |
16 | [PERF_RECORD_MMAP] = "MMAP", | |
5c5e854b | 17 | [PERF_RECORD_MMAP2] = "MMAP2", |
3cb6d154 FW |
18 | [PERF_RECORD_LOST] = "LOST", |
19 | [PERF_RECORD_COMM] = "COMM", | |
20 | [PERF_RECORD_EXIT] = "EXIT", | |
21 | [PERF_RECORD_THROTTLE] = "THROTTLE", | |
22 | [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", | |
23 | [PERF_RECORD_FORK] = "FORK", | |
24 | [PERF_RECORD_READ] = "READ", | |
25 | [PERF_RECORD_SAMPLE] = "SAMPLE", | |
26 | [PERF_RECORD_HEADER_ATTR] = "ATTR", | |
27 | [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", | |
28 | [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", | |
29 | [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", | |
30 | [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", | |
3c659eed | 31 | [PERF_RECORD_ID_INDEX] = "ID_INDEX", |
c8446b9b ACM |
32 | }; |
33 | ||
8115d60c | 34 | const char *perf_event__name(unsigned int id) |
3835bc00 | 35 | { |
8115d60c | 36 | if (id >= ARRAY_SIZE(perf_event__names)) |
3835bc00 | 37 | return "INVALID"; |
8115d60c | 38 | if (!perf_event__names[id]) |
3835bc00 | 39 | return "UNKNOWN"; |
8115d60c | 40 | return perf_event__names[id]; |
3835bc00 TG |
41 | } |
42 | ||
8d50e5b4 | 43 | static struct perf_sample synth_sample = { |
640c03ce ACM |
44 | .pid = -1, |
45 | .tid = -1, | |
46 | .time = -1, | |
47 | .stream_id = -1, | |
48 | .cpu = -1, | |
49 | .period = 1, | |
50 | }; | |
51 | ||
5aa0b030 DA |
52 | /* |
53 | * Assumes that the first 4095 bytes of /proc/pid/stat contains | |
54 | * the comm and tgid. | |
55 | */ | |
f5faf726 | 56 | static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len) |
234fbbf5 | 57 | { |
234fbbf5 | 58 | char filename[PATH_MAX]; |
5aa0b030 DA |
59 | char bf[4096]; |
60 | int fd; | |
61 | size_t size = 0, n; | |
f5faf726 | 62 | pid_t tgid = -1; |
5aa0b030 | 63 | char *nl, *name, *tgids; |
234fbbf5 ACM |
64 | |
65 | snprintf(filename, sizeof(filename), "/proc/%d/status", pid); | |
66 | ||
5aa0b030 DA |
67 | fd = open(filename, O_RDONLY); |
68 | if (fd < 0) { | |
234fbbf5 ACM |
69 | pr_debug("couldn't open %s\n", filename); |
70 | return 0; | |
71 | } | |
72 | ||
5aa0b030 DA |
73 | n = read(fd, bf, sizeof(bf) - 1); |
74 | close(fd); | |
75 | if (n <= 0) { | |
76 | pr_warning("Couldn't get COMM and tgid for pid %d\n", | |
77 | pid); | |
78 | return -1; | |
234fbbf5 | 79 | } |
5aa0b030 | 80 | bf[n] = '\0'; |
234fbbf5 | 81 | |
5aa0b030 DA |
82 | name = strstr(bf, "Name:"); |
83 | tgids = strstr(bf, "Tgid:"); | |
84 | ||
85 | if (name) { | |
86 | name += 5; /* strlen("Name:") */ | |
87 | ||
88 | while (*name && isspace(*name)) | |
89 | ++name; | |
90 | ||
91 | nl = strchr(name, '\n'); | |
92 | if (nl) | |
93 | *nl = '\0'; | |
94 | ||
95 | size = strlen(name); | |
96 | if (size >= len) | |
97 | size = len - 1; | |
98 | memcpy(comm, name, size); | |
99 | comm[size] = '\0'; | |
100 | } else { | |
101 | pr_debug("Name: string not found for pid %d\n", pid); | |
102 | } | |
103 | ||
104 | if (tgids) { | |
105 | tgids += 5; /* strlen("Tgid:") */ | |
106 | tgid = atoi(tgids); | |
107 | } else { | |
108 | pr_debug("Tgid: string not found for pid %d\n", pid); | |
109 | } | |
f5faf726 DA |
110 | |
111 | return tgid; | |
112 | } | |
113 | ||
4aa5f4f7 | 114 | static pid_t perf_event__prepare_comm(union perf_event *event, pid_t pid, |
f5faf726 DA |
115 | struct machine *machine) |
116 | { | |
f5faf726 | 117 | size_t size; |
f5faf726 DA |
118 | pid_t tgid; |
119 | ||
120 | memset(&event->comm, 0, sizeof(event->comm)); | |
121 | ||
f5db57c4 DY |
122 | if (machine__is_host(machine)) |
123 | tgid = perf_event__get_comm_tgid(pid, event->comm.comm, | |
124 | sizeof(event->comm.comm)); | |
125 | else | |
126 | tgid = machine->pid; | |
127 | ||
f5faf726 DA |
128 | if (tgid < 0) |
129 | goto out; | |
130 | ||
131 | event->comm.pid = tgid; | |
9c90a61c | 132 | event->comm.header.type = PERF_RECORD_COMM; |
f5faf726 DA |
133 | |
134 | size = strlen(event->comm.comm) + 1; | |
9ac3e487 | 135 | size = PERF_ALIGN(size, sizeof(u64)); |
743eb868 | 136 | memset(event->comm.comm + size, 0, machine->id_hdr_size); |
9c90a61c ACM |
137 | event->comm.header.size = (sizeof(event->comm) - |
138 | (sizeof(event->comm.comm) - size) + | |
743eb868 | 139 | machine->id_hdr_size); |
bfd66cc7 | 140 | event->comm.tid = pid; |
4aa5f4f7 ACM |
141 | out: |
142 | return tgid; | |
143 | } | |
144 | ||
145 | static pid_t perf_event__synthesize_comm(struct perf_tool *tool, | |
146 | union perf_event *event, pid_t pid, | |
147 | perf_event__handler_t process, | |
148 | struct machine *machine) | |
149 | { | |
150 | pid_t tgid = perf_event__prepare_comm(event, pid, machine); | |
151 | ||
152 | if (tgid == -1) | |
153 | goto out; | |
f5faf726 | 154 | |
bfd66cc7 DZ |
155 | if (process(tool, event, &synth_sample, machine) != 0) |
156 | return -1; | |
234fbbf5 | 157 | |
9c90a61c | 158 | out: |
9c90a61c | 159 | return tgid; |
234fbbf5 ACM |
160 | } |
161 | ||
363b785f DZ |
162 | static int perf_event__synthesize_fork(struct perf_tool *tool, |
163 | union perf_event *event, pid_t pid, | |
164 | pid_t tgid, perf_event__handler_t process, | |
165 | struct machine *machine) | |
166 | { | |
167 | memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); | |
168 | ||
363b785f DZ |
169 | event->fork.ppid = tgid; |
170 | event->fork.ptid = tgid; | |
171 | event->fork.pid = tgid; | |
172 | event->fork.tid = pid; | |
173 | event->fork.header.type = PERF_RECORD_FORK; | |
174 | ||
175 | event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); | |
176 | ||
177 | if (process(tool, event, &synth_sample, machine) != 0) | |
178 | return -1; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
a18382b6 JO |
183 | int perf_event__synthesize_mmap_events(struct perf_tool *tool, |
184 | union perf_event *event, | |
185 | pid_t pid, pid_t tgid, | |
186 | perf_event__handler_t process, | |
187 | struct machine *machine, | |
188 | bool mmap_data) | |
234fbbf5 ACM |
189 | { |
190 | char filename[PATH_MAX]; | |
191 | FILE *fp; | |
1e6d5322 | 192 | int rc = 0; |
234fbbf5 | 193 | |
c239c25a DY |
194 | if (machine__is_default_guest(machine)) |
195 | return 0; | |
196 | ||
99563465 DY |
197 | snprintf(filename, sizeof(filename), "%s/proc/%d/maps", |
198 | machine->root_dir, pid); | |
234fbbf5 ACM |
199 | |
200 | fp = fopen(filename, "r"); | |
201 | if (fp == NULL) { | |
202 | /* | |
203 | * We raced with a task exiting - just return: | |
204 | */ | |
205 | pr_debug("couldn't open %s\n", filename); | |
206 | return -1; | |
207 | } | |
208 | ||
a5a5ba72 | 209 | event->header.type = PERF_RECORD_MMAP2; |
9c90a61c | 210 | |
234fbbf5 | 211 | while (1) { |
60648033 NK |
212 | char bf[BUFSIZ]; |
213 | char prot[5]; | |
214 | char execname[PATH_MAX]; | |
215 | char anonstr[] = "//anon"; | |
a5a5ba72 | 216 | unsigned int ino; |
234fbbf5 | 217 | size_t size; |
5c5e854b | 218 | ssize_t n; |
60648033 | 219 | |
234fbbf5 ACM |
220 | if (fgets(bf, sizeof(bf), fp) == NULL) |
221 | break; | |
222 | ||
60648033 NK |
223 | /* ensure null termination since stack will be reused. */ |
224 | strcpy(execname, ""); | |
225 | ||
234fbbf5 | 226 | /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ |
a5a5ba72 DZ |
227 | n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n", |
228 | &event->mmap2.start, &event->mmap2.len, prot, | |
229 | &event->mmap2.pgoff, &event->mmap2.maj, | |
230 | &event->mmap2.min, | |
231 | &ino, execname); | |
232 | ||
9d4ecc88 DZ |
233 | /* |
234 | * Anon maps don't have the execname. | |
235 | */ | |
a5a5ba72 | 236 | if (n < 7) |
5c5e854b | 237 | continue; |
a5a5ba72 DZ |
238 | |
239 | event->mmap2.ino = (u64)ino; | |
240 | ||
62605dc5 ACM |
241 | /* |
242 | * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c | |
243 | */ | |
73547aac DY |
244 | if (machine__is_host(machine)) |
245 | event->header.misc = PERF_RECORD_MISC_USER; | |
246 | else | |
247 | event->header.misc = PERF_RECORD_MISC_GUEST_USER; | |
60648033 | 248 | |
7ef80703 DZ |
249 | /* map protection and flags bits */ |
250 | event->mmap2.prot = 0; | |
251 | event->mmap2.flags = 0; | |
252 | if (prot[0] == 'r') | |
253 | event->mmap2.prot |= PROT_READ; | |
254 | if (prot[1] == 'w') | |
255 | event->mmap2.prot |= PROT_WRITE; | |
256 | if (prot[2] == 'x') | |
257 | event->mmap2.prot |= PROT_EXEC; | |
258 | ||
259 | if (prot[3] == 's') | |
260 | event->mmap2.flags |= MAP_SHARED; | |
261 | else | |
262 | event->mmap2.flags |= MAP_PRIVATE; | |
263 | ||
62605dc5 ACM |
264 | if (prot[2] != 'x') { |
265 | if (!mmap_data || prot[0] != 'r') | |
266 | continue; | |
267 | ||
268 | event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; | |
269 | } | |
60648033 NK |
270 | |
271 | if (!strcmp(execname, "")) | |
272 | strcpy(execname, anonstr); | |
273 | ||
274 | size = strlen(execname) + 1; | |
a5a5ba72 | 275 | memcpy(event->mmap2.filename, execname, size); |
60648033 | 276 | size = PERF_ALIGN(size, sizeof(u64)); |
a5a5ba72 DZ |
277 | event->mmap2.len -= event->mmap.start; |
278 | event->mmap2.header.size = (sizeof(event->mmap2) - | |
279 | (sizeof(event->mmap2.filename) - size)); | |
280 | memset(event->mmap2.filename + size, 0, machine->id_hdr_size); | |
281 | event->mmap2.header.size += machine->id_hdr_size; | |
282 | event->mmap2.pid = tgid; | |
283 | event->mmap2.tid = pid; | |
60648033 NK |
284 | |
285 | if (process(tool, event, &synth_sample, machine) != 0) { | |
286 | rc = -1; | |
287 | break; | |
234fbbf5 ACM |
288 | } |
289 | } | |
290 | ||
291 | fclose(fp); | |
1e6d5322 | 292 | return rc; |
234fbbf5 ACM |
293 | } |
294 | ||
45694aa7 | 295 | int perf_event__synthesize_modules(struct perf_tool *tool, |
d20deb64 | 296 | perf_event__handler_t process, |
8115d60c | 297 | struct machine *machine) |
b7cece76 | 298 | { |
1e6d5322 | 299 | int rc = 0; |
b7cece76 | 300 | struct rb_node *nd; |
23346f21 | 301 | struct map_groups *kmaps = &machine->kmaps; |
8115d60c | 302 | union perf_event *event = zalloc((sizeof(event->mmap) + |
743eb868 | 303 | machine->id_hdr_size)); |
9c90a61c ACM |
304 | if (event == NULL) { |
305 | pr_debug("Not enough memory synthesizing mmap event " | |
306 | "for kernel modules\n"); | |
307 | return -1; | |
308 | } | |
309 | ||
310 | event->header.type = PERF_RECORD_MMAP; | |
b7cece76 | 311 | |
a1645ce1 ZY |
312 | /* |
313 | * kernel uses 0 for user space maps, see kernel/perf_event.c | |
314 | * __perf_event_mmap | |
315 | */ | |
23346f21 | 316 | if (machine__is_host(machine)) |
9c90a61c | 317 | event->header.misc = PERF_RECORD_MISC_KERNEL; |
a1645ce1 | 318 | else |
9c90a61c | 319 | event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; |
a1645ce1 ZY |
320 | |
321 | for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]); | |
b7cece76 | 322 | nd; nd = rb_next(nd)) { |
b7cece76 ACM |
323 | size_t size; |
324 | struct map *pos = rb_entry(nd, struct map, rb_node); | |
325 | ||
326 | if (pos->dso->kernel) | |
327 | continue; | |
328 | ||
9ac3e487 | 329 | size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); |
9c90a61c ACM |
330 | event->mmap.header.type = PERF_RECORD_MMAP; |
331 | event->mmap.header.size = (sizeof(event->mmap) - | |
332 | (sizeof(event->mmap.filename) - size)); | |
743eb868 ACM |
333 | memset(event->mmap.filename + size, 0, machine->id_hdr_size); |
334 | event->mmap.header.size += machine->id_hdr_size; | |
9c90a61c ACM |
335 | event->mmap.start = pos->start; |
336 | event->mmap.len = pos->end - pos->start; | |
337 | event->mmap.pid = machine->pid; | |
338 | ||
339 | memcpy(event->mmap.filename, pos->dso->long_name, | |
b7cece76 | 340 | pos->dso->long_name_len + 1); |
1e6d5322 DA |
341 | if (process(tool, event, &synth_sample, machine) != 0) { |
342 | rc = -1; | |
343 | break; | |
344 | } | |
b7cece76 ACM |
345 | } |
346 | ||
9c90a61c | 347 | free(event); |
1e6d5322 | 348 | return rc; |
b7cece76 ACM |
349 | } |
350 | ||
8115d60c ACM |
351 | static int __event__synthesize_thread(union perf_event *comm_event, |
352 | union perf_event *mmap_event, | |
363b785f | 353 | union perf_event *fork_event, |
defd8d38 DA |
354 | pid_t pid, int full, |
355 | perf_event__handler_t process, | |
45694aa7 | 356 | struct perf_tool *tool, |
62605dc5 | 357 | struct machine *machine, bool mmap_data) |
234fbbf5 | 358 | { |
bfd66cc7 DZ |
359 | char filename[PATH_MAX]; |
360 | DIR *tasks; | |
361 | struct dirent dirent, *next; | |
362 | pid_t tgid; | |
363 | ||
364 | /* special case: only send one comm event using passed in pid */ | |
365 | if (!full) { | |
366 | tgid = perf_event__synthesize_comm(tool, comm_event, pid, | |
367 | process, machine); | |
368 | ||
369 | if (tgid == -1) | |
370 | return -1; | |
371 | ||
372 | return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, | |
373 | process, machine, mmap_data); | |
374 | } | |
375 | ||
376 | if (machine__is_default_guest(machine)) | |
377 | return 0; | |
378 | ||
379 | snprintf(filename, sizeof(filename), "%s/proc/%d/task", | |
380 | machine->root_dir, pid); | |
381 | ||
382 | tasks = opendir(filename); | |
383 | if (tasks == NULL) { | |
384 | pr_debug("couldn't open %s\n", filename); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | while (!readdir_r(tasks, &dirent, &next) && next) { | |
389 | char *end; | |
390 | int rc = 0; | |
391 | pid_t _pid; | |
392 | ||
393 | _pid = strtol(dirent.d_name, &end, 10); | |
394 | if (*end) | |
395 | continue; | |
396 | ||
4aa5f4f7 | 397 | tgid = perf_event__prepare_comm(comm_event, _pid, machine); |
bfd66cc7 DZ |
398 | if (tgid == -1) |
399 | return -1; | |
400 | ||
4aa5f4f7 ACM |
401 | if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, |
402 | process, machine) < 0) | |
403 | return -1; | |
404 | /* | |
405 | * Send the prepared comm event | |
406 | */ | |
407 | if (process(tool, comm_event, &synth_sample, machine) != 0) | |
408 | return -1; | |
409 | ||
363b785f DZ |
410 | if (_pid == pid) { |
411 | /* process the parent's maps too */ | |
412 | rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, | |
413 | process, machine, mmap_data); | |
363b785f | 414 | } |
bfd66cc7 DZ |
415 | |
416 | if (rc) | |
417 | return rc; | |
418 | } | |
419 | ||
420 | closedir(tasks); | |
421 | return 0; | |
234fbbf5 ACM |
422 | } |
423 | ||
45694aa7 | 424 | int perf_event__synthesize_thread_map(struct perf_tool *tool, |
d20deb64 | 425 | struct thread_map *threads, |
7c940c18 | 426 | perf_event__handler_t process, |
62605dc5 ACM |
427 | struct machine *machine, |
428 | bool mmap_data) | |
9c90a61c | 429 | { |
363b785f | 430 | union perf_event *comm_event, *mmap_event, *fork_event; |
defd8d38 | 431 | int err = -1, thread, j; |
9c90a61c | 432 | |
743eb868 | 433 | comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); |
9c90a61c ACM |
434 | if (comm_event == NULL) |
435 | goto out; | |
436 | ||
743eb868 | 437 | mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); |
9c90a61c ACM |
438 | if (mmap_event == NULL) |
439 | goto out_free_comm; | |
440 | ||
363b785f DZ |
441 | fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); |
442 | if (fork_event == NULL) | |
443 | goto out_free_mmap; | |
444 | ||
401b8e13 ACM |
445 | err = 0; |
446 | for (thread = 0; thread < threads->nr; ++thread) { | |
447 | if (__event__synthesize_thread(comm_event, mmap_event, | |
363b785f | 448 | fork_event, |
defd8d38 | 449 | threads->map[thread], 0, |
62605dc5 ACM |
450 | process, tool, machine, |
451 | mmap_data)) { | |
401b8e13 ACM |
452 | err = -1; |
453 | break; | |
454 | } | |
defd8d38 DA |
455 | |
456 | /* | |
457 | * comm.pid is set to thread group id by | |
458 | * perf_event__synthesize_comm | |
459 | */ | |
460 | if ((int) comm_event->comm.pid != threads->map[thread]) { | |
461 | bool need_leader = true; | |
462 | ||
463 | /* is thread group leader in thread_map? */ | |
464 | for (j = 0; j < threads->nr; ++j) { | |
465 | if ((int) comm_event->comm.pid == threads->map[j]) { | |
466 | need_leader = false; | |
467 | break; | |
468 | } | |
469 | } | |
470 | ||
471 | /* if not, generate events for it */ | |
472 | if (need_leader && | |
62605dc5 | 473 | __event__synthesize_thread(comm_event, mmap_event, |
363b785f | 474 | fork_event, |
62605dc5 ACM |
475 | comm_event->comm.pid, 0, |
476 | process, tool, machine, | |
477 | mmap_data)) { | |
defd8d38 DA |
478 | err = -1; |
479 | break; | |
480 | } | |
481 | } | |
401b8e13 | 482 | } |
363b785f DZ |
483 | free(fork_event); |
484 | out_free_mmap: | |
9c90a61c ACM |
485 | free(mmap_event); |
486 | out_free_comm: | |
487 | free(comm_event); | |
488 | out: | |
489 | return err; | |
490 | } | |
491 | ||
45694aa7 | 492 | int perf_event__synthesize_threads(struct perf_tool *tool, |
d20deb64 | 493 | perf_event__handler_t process, |
62605dc5 | 494 | struct machine *machine, bool mmap_data) |
234fbbf5 ACM |
495 | { |
496 | DIR *proc; | |
99563465 | 497 | char proc_path[PATH_MAX]; |
234fbbf5 | 498 | struct dirent dirent, *next; |
363b785f | 499 | union perf_event *comm_event, *mmap_event, *fork_event; |
9c90a61c ACM |
500 | int err = -1; |
501 | ||
574799bf NK |
502 | if (machine__is_default_guest(machine)) |
503 | return 0; | |
504 | ||
743eb868 | 505 | comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); |
9c90a61c ACM |
506 | if (comm_event == NULL) |
507 | goto out; | |
508 | ||
743eb868 | 509 | mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); |
9c90a61c ACM |
510 | if (mmap_event == NULL) |
511 | goto out_free_comm; | |
234fbbf5 | 512 | |
363b785f DZ |
513 | fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); |
514 | if (fork_event == NULL) | |
515 | goto out_free_mmap; | |
516 | ||
99563465 DY |
517 | snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); |
518 | proc = opendir(proc_path); | |
519 | ||
9c90a61c | 520 | if (proc == NULL) |
363b785f | 521 | goto out_free_fork; |
234fbbf5 ACM |
522 | |
523 | while (!readdir_r(proc, &dirent, &next) && next) { | |
524 | char *end; | |
525 | pid_t pid = strtol(dirent.d_name, &end, 10); | |
526 | ||
527 | if (*end) /* only interested in proper numerical dirents */ | |
528 | continue; | |
ba361c92 ACM |
529 | /* |
530 | * We may race with exiting thread, so don't stop just because | |
531 | * one thread couldn't be synthesized. | |
532 | */ | |
363b785f DZ |
533 | __event__synthesize_thread(comm_event, mmap_event, fork_event, pid, |
534 | 1, process, tool, machine, mmap_data); | |
234fbbf5 ACM |
535 | } |
536 | ||
9c90a61c | 537 | err = 0; |
1e6d5322 | 538 | closedir(proc); |
363b785f DZ |
539 | out_free_fork: |
540 | free(fork_event); | |
9c90a61c ACM |
541 | out_free_mmap: |
542 | free(mmap_event); | |
543 | out_free_comm: | |
544 | free(comm_event); | |
545 | out: | |
546 | return err; | |
234fbbf5 | 547 | } |
62daacb5 | 548 | |
56b03f3c ACM |
549 | struct process_symbol_args { |
550 | const char *name; | |
551 | u64 start; | |
552 | }; | |
553 | ||
3b01a413 | 554 | static int find_symbol_cb(void *arg, const char *name, char type, |
82151520 | 555 | u64 start) |
56b03f3c ACM |
556 | { |
557 | struct process_symbol_args *args = arg; | |
558 | ||
881516eb ACM |
559 | /* |
560 | * Must be a function or at least an alias, as in PARISC64, where "_text" is | |
561 | * an 'A' to the same address as "_stext". | |
562 | */ | |
563 | if (!(symbol_type__is_a(type, MAP__FUNCTION) || | |
564 | type == 'A') || strcmp(name, args->name)) | |
56b03f3c ACM |
565 | return 0; |
566 | ||
567 | args->start = start; | |
568 | return 1; | |
569 | } | |
570 | ||
29b596b5 AH |
571 | u64 kallsyms__get_function_start(const char *kallsyms_filename, |
572 | const char *symbol_name) | |
573 | { | |
574 | struct process_symbol_args args = { .name = symbol_name, }; | |
575 | ||
576 | if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) | |
577 | return 0; | |
578 | ||
579 | return args.start; | |
580 | } | |
581 | ||
45694aa7 | 582 | int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, |
d20deb64 | 583 | perf_event__handler_t process, |
0ae617be | 584 | struct machine *machine) |
56b03f3c ACM |
585 | { |
586 | size_t size; | |
0ae617be | 587 | const char *mmap_name; |
a1645ce1 ZY |
588 | char name_buff[PATH_MAX]; |
589 | struct map *map; | |
0ae617be | 590 | struct kmap *kmap; |
9c90a61c | 591 | int err; |
a5c2a4c9 AK |
592 | union perf_event *event; |
593 | ||
594 | if (machine->vmlinux_maps[0] == NULL) | |
595 | return -1; | |
596 | ||
56b03f3c ACM |
597 | /* |
598 | * We should get this from /sys/kernel/sections/.text, but till that is | |
599 | * available use this, and after it is use this as a fallback for older | |
600 | * kernels. | |
601 | */ | |
a5c2a4c9 | 602 | event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); |
9c90a61c ACM |
603 | if (event == NULL) { |
604 | pr_debug("Not enough memory synthesizing mmap event " | |
605 | "for kernel modules\n"); | |
606 | return -1; | |
607 | } | |
56b03f3c | 608 | |
48ea8f54 | 609 | mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff)); |
23346f21 | 610 | if (machine__is_host(machine)) { |
a1645ce1 ZY |
611 | /* |
612 | * kernel uses PERF_RECORD_MISC_USER for user space maps, | |
613 | * see kernel/perf_event.c __perf_event_mmap | |
614 | */ | |
9c90a61c | 615 | event->header.misc = PERF_RECORD_MISC_KERNEL; |
a1645ce1 | 616 | } else { |
9c90a61c | 617 | event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; |
0b9e01a4 | 618 | } |
56b03f3c | 619 | |
23346f21 | 620 | map = machine->vmlinux_maps[MAP__FUNCTION]; |
0ae617be | 621 | kmap = map__kmap(map); |
9c90a61c | 622 | size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), |
0ae617be | 623 | "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1; |
9ac3e487 | 624 | size = PERF_ALIGN(size, sizeof(u64)); |
9c90a61c ACM |
625 | event->mmap.header.type = PERF_RECORD_MMAP; |
626 | event->mmap.header.size = (sizeof(event->mmap) - | |
743eb868 | 627 | (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); |
0ae617be | 628 | event->mmap.pgoff = kmap->ref_reloc_sym->addr; |
9c90a61c ACM |
629 | event->mmap.start = map->start; |
630 | event->mmap.len = map->end - event->mmap.start; | |
631 | event->mmap.pid = machine->pid; | |
632 | ||
45694aa7 | 633 | err = process(tool, event, &synth_sample, machine); |
9c90a61c ACM |
634 | free(event); |
635 | ||
636 | return err; | |
56b03f3c ACM |
637 | } |
638 | ||
482ad897 ACM |
639 | size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) |
640 | { | |
022c50d0 AH |
641 | const char *s; |
642 | ||
643 | if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) | |
644 | s = " exec"; | |
645 | else | |
646 | s = ""; | |
647 | ||
50674065 | 648 | return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); |
482ad897 ACM |
649 | } |
650 | ||
1d037ca1 | 651 | int perf_event__process_comm(struct perf_tool *tool __maybe_unused, |
d20deb64 | 652 | union perf_event *event, |
162f0bef | 653 | struct perf_sample *sample, |
743eb868 | 654 | struct machine *machine) |
62daacb5 | 655 | { |
162f0bef | 656 | return machine__process_comm_event(machine, event, sample); |
62daacb5 ACM |
657 | } |
658 | ||
1d037ca1 | 659 | int perf_event__process_lost(struct perf_tool *tool __maybe_unused, |
d20deb64 | 660 | union perf_event *event, |
162f0bef | 661 | struct perf_sample *sample, |
b0a7d1a0 | 662 | struct machine *machine) |
62daacb5 | 663 | { |
162f0bef | 664 | return machine__process_lost_event(machine, event, sample); |
a1645ce1 | 665 | } |
b7cece76 | 666 | |
482ad897 ACM |
667 | size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) |
668 | { | |
62605dc5 | 669 | return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", |
482ad897 | 670 | event->mmap.pid, event->mmap.tid, event->mmap.start, |
62605dc5 ACM |
671 | event->mmap.len, event->mmap.pgoff, |
672 | (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', | |
673 | event->mmap.filename); | |
482ad897 ACM |
674 | } |
675 | ||
5c5e854b SE |
676 | size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) |
677 | { | |
678 | return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 | |
7ef80703 | 679 | " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", |
5c5e854b SE |
680 | event->mmap2.pid, event->mmap2.tid, event->mmap2.start, |
681 | event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, | |
682 | event->mmap2.min, event->mmap2.ino, | |
683 | event->mmap2.ino_generation, | |
7ef80703 DZ |
684 | (event->mmap2.prot & PROT_READ) ? 'r' : '-', |
685 | (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', | |
686 | (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', | |
687 | (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', | |
5c5e854b SE |
688 | event->mmap2.filename); |
689 | } | |
690 | ||
b0a7d1a0 | 691 | int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, |
d20deb64 | 692 | union perf_event *event, |
162f0bef | 693 | struct perf_sample *sample, |
743eb868 | 694 | struct machine *machine) |
a1645ce1 | 695 | { |
162f0bef | 696 | return machine__process_mmap_event(machine, event, sample); |
62daacb5 ACM |
697 | } |
698 | ||
5c5e854b SE |
699 | int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, |
700 | union perf_event *event, | |
162f0bef | 701 | struct perf_sample *sample, |
5c5e854b SE |
702 | struct machine *machine) |
703 | { | |
162f0bef | 704 | return machine__process_mmap2_event(machine, event, sample); |
5c5e854b SE |
705 | } |
706 | ||
482ad897 ACM |
707 | size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) |
708 | { | |
709 | return fprintf(fp, "(%d:%d):(%d:%d)\n", | |
710 | event->fork.pid, event->fork.tid, | |
711 | event->fork.ppid, event->fork.ptid); | |
712 | } | |
713 | ||
f62d3f0f | 714 | int perf_event__process_fork(struct perf_tool *tool __maybe_unused, |
d20deb64 | 715 | union perf_event *event, |
162f0bef | 716 | struct perf_sample *sample, |
f62d3f0f | 717 | struct machine *machine) |
62daacb5 | 718 | { |
162f0bef | 719 | return machine__process_fork_event(machine, event, sample); |
62daacb5 | 720 | } |
1ed091c4 | 721 | |
f62d3f0f ACM |
722 | int perf_event__process_exit(struct perf_tool *tool __maybe_unused, |
723 | union perf_event *event, | |
162f0bef | 724 | struct perf_sample *sample, |
f62d3f0f ACM |
725 | struct machine *machine) |
726 | { | |
162f0bef | 727 | return machine__process_exit_event(machine, event, sample); |
f62d3f0f ACM |
728 | } |
729 | ||
482ad897 ACM |
730 | size_t perf_event__fprintf(union perf_event *event, FILE *fp) |
731 | { | |
732 | size_t ret = fprintf(fp, "PERF_RECORD_%s", | |
733 | perf_event__name(event->header.type)); | |
734 | ||
735 | switch (event->header.type) { | |
736 | case PERF_RECORD_COMM: | |
737 | ret += perf_event__fprintf_comm(event, fp); | |
738 | break; | |
739 | case PERF_RECORD_FORK: | |
740 | case PERF_RECORD_EXIT: | |
741 | ret += perf_event__fprintf_task(event, fp); | |
742 | break; | |
743 | case PERF_RECORD_MMAP: | |
744 | ret += perf_event__fprintf_mmap(event, fp); | |
745 | break; | |
5c5e854b SE |
746 | case PERF_RECORD_MMAP2: |
747 | ret += perf_event__fprintf_mmap2(event, fp); | |
748 | break; | |
482ad897 ACM |
749 | default: |
750 | ret += fprintf(fp, "\n"); | |
751 | } | |
752 | ||
753 | return ret; | |
754 | } | |
755 | ||
b0a7d1a0 ACM |
756 | int perf_event__process(struct perf_tool *tool __maybe_unused, |
757 | union perf_event *event, | |
162f0bef | 758 | struct perf_sample *sample, |
b0a7d1a0 | 759 | struct machine *machine) |
b83f920e | 760 | { |
162f0bef | 761 | return machine__process_event(machine, event, sample); |
b83f920e SD |
762 | } |
763 | ||
bb871a9c | 764 | void thread__find_addr_map(struct thread *thread, u8 cpumode, |
743eb868 | 765 | enum map_type type, u64 addr, |
326f59bf | 766 | struct addr_location *al) |
1ed091c4 | 767 | { |
93d5731d | 768 | struct map_groups *mg = thread->mg; |
bb871a9c | 769 | struct machine *machine = mg->machine; |
5b7ba82a | 770 | bool load_map = false; |
1ed091c4 | 771 | |
cc22e575 | 772 | al->machine = machine; |
316c7136 | 773 | al->thread = thread; |
1ed091c4 | 774 | al->addr = addr; |
a1645ce1 | 775 | al->cpumode = cpumode; |
b3cef7f6 | 776 | al->filtered = 0; |
1ed091c4 | 777 | |
743eb868 ACM |
778 | if (machine == NULL) { |
779 | al->map = NULL; | |
780 | return; | |
781 | } | |
782 | ||
a1645ce1 | 783 | if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { |
1ed091c4 | 784 | al->level = 'k'; |
23346f21 | 785 | mg = &machine->kmaps; |
5b7ba82a | 786 | load_map = true; |
a1645ce1 | 787 | } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { |
1ed091c4 | 788 | al->level = '.'; |
a1645ce1 ZY |
789 | } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { |
790 | al->level = 'g'; | |
23346f21 | 791 | mg = &machine->kmaps; |
5b7ba82a | 792 | load_map = true; |
fb50bb43 DY |
793 | } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { |
794 | al->level = 'u'; | |
a1645ce1 | 795 | } else { |
fb50bb43 | 796 | al->level = 'H'; |
1ed091c4 | 797 | al->map = NULL; |
a1645ce1 ZY |
798 | |
799 | if ((cpumode == PERF_RECORD_MISC_GUEST_USER || | |
800 | cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && | |
801 | !perf_guest) | |
b3cef7f6 | 802 | al->filtered |= (1 << HIST_FILTER__GUEST); |
a1645ce1 ZY |
803 | if ((cpumode == PERF_RECORD_MISC_USER || |
804 | cpumode == PERF_RECORD_MISC_KERNEL) && | |
805 | !perf_host) | |
b3cef7f6 | 806 | al->filtered |= (1 << HIST_FILTER__HOST); |
a1645ce1 | 807 | |
1ed091c4 ACM |
808 | return; |
809 | } | |
810 | try_again: | |
9958e1f0 | 811 | al->map = map_groups__find(mg, type, al->addr); |
1ed091c4 ACM |
812 | if (al->map == NULL) { |
813 | /* | |
814 | * If this is outside of all known maps, and is a negative | |
815 | * address, try to look it up in the kernel dso, as it might be | |
816 | * a vsyscall or vdso (which executes in user-mode). | |
817 | * | |
818 | * XXX This is nasty, we should have a symbol list in the | |
819 | * "[vdso]" dso, but for now lets use the old trick of looking | |
820 | * in the whole kernel symbol list. | |
821 | */ | |
fbe2af45 AH |
822 | if (cpumode == PERF_RECORD_MISC_USER && machine && |
823 | mg != &machine->kmaps && | |
824 | machine__kernel_ip(machine, al->addr)) { | |
23346f21 | 825 | mg = &machine->kmaps; |
1f2a7069 | 826 | load_map = true; |
1ed091c4 ACM |
827 | goto try_again; |
828 | } | |
5b7ba82a AH |
829 | } else { |
830 | /* | |
831 | * Kernel maps might be changed when loading symbols so loading | |
832 | * must be done prior to using kernel maps. | |
833 | */ | |
834 | if (load_map) | |
326f59bf | 835 | map__load(al->map, machine->symbol_filter); |
1ed091c4 | 836 | al->addr = al->map->map_ip(al->map, al->addr); |
5b7ba82a | 837 | } |
59ee68ec ACM |
838 | } |
839 | ||
bb871a9c | 840 | void thread__find_addr_location(struct thread *thread, |
743eb868 | 841 | u8 cpumode, enum map_type type, u64 addr, |
61710bde | 842 | struct addr_location *al) |
59ee68ec | 843 | { |
bb871a9c | 844 | thread__find_addr_map(thread, cpumode, type, addr, al); |
59ee68ec | 845 | if (al->map != NULL) |
61710bde | 846 | al->sym = map__find_symbol(al->map, al->addr, |
bb871a9c | 847 | thread->mg->machine->symbol_filter); |
59ee68ec ACM |
848 | else |
849 | al->sym = NULL; | |
1ed091c4 ACM |
850 | } |
851 | ||
8115d60c | 852 | int perf_event__preprocess_sample(const union perf_event *event, |
743eb868 | 853 | struct machine *machine, |
8115d60c | 854 | struct addr_location *al, |
e44baa3e | 855 | struct perf_sample *sample) |
1ed091c4 | 856 | { |
8115d60c | 857 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
ef89325f | 858 | struct thread *thread = machine__findnew_thread(machine, sample->pid, |
13ce34df | 859 | sample->tid); |
41a37e20 | 860 | |
1ed091c4 ACM |
861 | if (thread == NULL) |
862 | return -1; | |
863 | ||
b9c5143a | 864 | dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); |
1f626bc3 | 865 | /* |
743eb868 | 866 | * Have we already created the kernel maps for this machine? |
1f626bc3 ACM |
867 | * |
868 | * This should have happened earlier, when we processed the kernel MMAP | |
869 | * events, but for older perf.data files there was no such thing, so do | |
870 | * it now. | |
871 | */ | |
872 | if (cpumode == PERF_RECORD_MISC_KERNEL && | |
743eb868 ACM |
873 | machine->vmlinux_maps[MAP__FUNCTION] == NULL) |
874 | machine__create_kernel_maps(machine); | |
1ed091c4 | 875 | |
bb871a9c | 876 | thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al); |
1ed091c4 ACM |
877 | dump_printf(" ...... dso: %s\n", |
878 | al->map ? al->map->dso->long_name : | |
879 | al->level == 'H' ? "[hypervisor]" : "<not found>"); | |
466fa764 NK |
880 | |
881 | if (thread__is_filtered(thread)) | |
882 | al->filtered |= (1 << HIST_FILTER__THREAD); | |
883 | ||
96415e4d | 884 | al->sym = NULL; |
8d50e5b4 | 885 | al->cpu = sample->cpu; |
96415e4d ACM |
886 | |
887 | if (al->map) { | |
cb8f4e9a NK |
888 | struct dso *dso = al->map->dso; |
889 | ||
96415e4d | 890 | if (symbol_conf.dso_list && |
cb8f4e9a NK |
891 | (!dso || !(strlist__has_entry(symbol_conf.dso_list, |
892 | dso->short_name) || | |
893 | (dso->short_name != dso->long_name && | |
894 | strlist__has_entry(symbol_conf.dso_list, | |
b3cef7f6 NK |
895 | dso->long_name))))) { |
896 | al->filtered |= (1 << HIST_FILTER__DSO); | |
b3cef7f6 | 897 | } |
96415e4d | 898 | |
e44baa3e AH |
899 | al->sym = map__find_symbol(al->map, al->addr, |
900 | machine->symbol_filter); | |
96415e4d | 901 | } |
c410a338 | 902 | |
1500b93b FT |
903 | if (symbol_conf.sym_list && |
904 | (!al->sym || !strlist__has_entry(symbol_conf.sym_list, | |
b3cef7f6 NK |
905 | al->sym->name))) { |
906 | al->filtered |= (1 << HIST_FILTER__SYMBOL); | |
b3cef7f6 | 907 | } |
c410a338 | 908 | |
c410a338 | 909 | return 0; |
1ed091c4 | 910 | } |
9b0d2d87 AH |
911 | |
912 | bool is_bts_event(struct perf_event_attr *attr) | |
913 | { | |
914 | return attr->type == PERF_TYPE_HARDWARE && | |
915 | (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && | |
916 | attr->sample_period == 1; | |
917 | } | |
918 | ||
919 | bool sample_addr_correlates_sym(struct perf_event_attr *attr) | |
920 | { | |
921 | if (attr->type == PERF_TYPE_SOFTWARE && | |
922 | (attr->config == PERF_COUNT_SW_PAGE_FAULTS || | |
923 | attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || | |
924 | attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) | |
925 | return true; | |
926 | ||
927 | if (is_bts_event(attr)) | |
928 | return true; | |
929 | ||
930 | return false; | |
931 | } | |
932 | ||
933 | void perf_event__preprocess_sample_addr(union perf_event *event, | |
934 | struct perf_sample *sample, | |
9b0d2d87 AH |
935 | struct thread *thread, |
936 | struct addr_location *al) | |
937 | { | |
938 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
939 | ||
bb871a9c | 940 | thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al); |
9b0d2d87 | 941 | if (!al->map) |
bb871a9c | 942 | thread__find_addr_map(thread, cpumode, MAP__VARIABLE, |
9b0d2d87 AH |
943 | sample->addr, al); |
944 | ||
945 | al->cpu = sample->cpu; | |
946 | al->sym = NULL; | |
947 | ||
948 | if (al->map) | |
949 | al->sym = map__find_symbol(al->map, al->addr, NULL); | |
950 | } |