]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - tools/perf/builtin-trace.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-artful-kernel.git] / tools / perf / builtin-trace.c
1 /*
2 * builtin-trace.c
3 *
4 * Builtin 'trace' command:
5 *
6 * Display a continuously updated trace of any workload, CPU, specific PID,
7 * system wide, etc. Default format is loosely strace like, but any other
8 * event may be specified using --event.
9 *
10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 *
12 * Initially based on the 'trace' prototype by Thomas Gleixner:
13 *
14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
15 *
16 * Released under the GPL v2. (and only v2, not any later version)
17 */
18
19 #include <traceevent/event-parse.h>
20 #include <api/fs/tracing_path.h>
21 #include "builtin.h"
22 #include "util/color.h"
23 #include "util/debug.h"
24 #include "util/evlist.h"
25 #include <subcmd/exec-cmd.h>
26 #include "util/machine.h"
27 #include "util/session.h"
28 #include "util/thread.h"
29 #include <subcmd/parse-options.h>
30 #include "util/strlist.h"
31 #include "util/intlist.h"
32 #include "util/thread_map.h"
33 #include "util/stat.h"
34 #include "trace-event.h"
35 #include "util/parse-events.h"
36 #include "util/bpf-loader.h"
37 #include "callchain.h"
38 #include "syscalltbl.h"
39 #include "rb_resort.h"
40
41 #include <libaudit.h> /* FIXME: Still needed for audit_errno_to_name */
42 #include <stdlib.h>
43 #include <linux/err.h>
44 #include <linux/filter.h>
45 #include <linux/audit.h>
46 #include <linux/random.h>
47 #include <linux/stringify.h>
48 #include <linux/time64.h>
49
50 #ifndef O_CLOEXEC
51 # define O_CLOEXEC 02000000
52 #endif
53
54 struct trace {
55 struct perf_tool tool;
56 struct syscalltbl *sctbl;
57 struct {
58 int max;
59 struct syscall *table;
60 struct {
61 struct perf_evsel *sys_enter,
62 *sys_exit;
63 } events;
64 } syscalls;
65 struct record_opts opts;
66 struct perf_evlist *evlist;
67 struct machine *host;
68 struct thread *current;
69 u64 base_time;
70 FILE *output;
71 unsigned long nr_events;
72 struct strlist *ev_qualifier;
73 struct {
74 size_t nr;
75 int *entries;
76 } ev_qualifier_ids;
77 struct {
78 size_t nr;
79 pid_t *entries;
80 } filter_pids;
81 double duration_filter;
82 double runtime_ms;
83 struct {
84 u64 vfs_getname,
85 proc_getname;
86 } stats;
87 unsigned int max_stack;
88 unsigned int min_stack;
89 bool not_ev_qualifier;
90 bool live;
91 bool full_time;
92 bool sched;
93 bool multiple_threads;
94 bool summary;
95 bool summary_only;
96 bool show_comm;
97 bool show_tool_stats;
98 bool trace_syscalls;
99 bool kernel_syscallchains;
100 bool force;
101 bool vfs_getname;
102 int trace_pgfaults;
103 int open_id;
104 };
105
106 struct tp_field {
107 int offset;
108 union {
109 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
110 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
111 };
112 };
113
114 #define TP_UINT_FIELD(bits) \
115 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
116 { \
117 u##bits value; \
118 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
119 return value; \
120 }
121
122 TP_UINT_FIELD(8);
123 TP_UINT_FIELD(16);
124 TP_UINT_FIELD(32);
125 TP_UINT_FIELD(64);
126
127 #define TP_UINT_FIELD__SWAPPED(bits) \
128 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
129 { \
130 u##bits value; \
131 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
132 return bswap_##bits(value);\
133 }
134
135 TP_UINT_FIELD__SWAPPED(16);
136 TP_UINT_FIELD__SWAPPED(32);
137 TP_UINT_FIELD__SWAPPED(64);
138
139 static int tp_field__init_uint(struct tp_field *field,
140 struct format_field *format_field,
141 bool needs_swap)
142 {
143 field->offset = format_field->offset;
144
145 switch (format_field->size) {
146 case 1:
147 field->integer = tp_field__u8;
148 break;
149 case 2:
150 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
151 break;
152 case 4:
153 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
154 break;
155 case 8:
156 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
157 break;
158 default:
159 return -1;
160 }
161
162 return 0;
163 }
164
165 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
166 {
167 return sample->raw_data + field->offset;
168 }
169
170 static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field)
171 {
172 field->offset = format_field->offset;
173 field->pointer = tp_field__ptr;
174 return 0;
175 }
176
177 struct syscall_tp {
178 struct tp_field id;
179 union {
180 struct tp_field args, ret;
181 };
182 };
183
184 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
185 struct tp_field *field,
186 const char *name)
187 {
188 struct format_field *format_field = perf_evsel__field(evsel, name);
189
190 if (format_field == NULL)
191 return -1;
192
193 return tp_field__init_uint(field, format_field, evsel->needs_swap);
194 }
195
196 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
197 ({ struct syscall_tp *sc = evsel->priv;\
198 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
199
200 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
201 struct tp_field *field,
202 const char *name)
203 {
204 struct format_field *format_field = perf_evsel__field(evsel, name);
205
206 if (format_field == NULL)
207 return -1;
208
209 return tp_field__init_ptr(field, format_field);
210 }
211
212 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
213 ({ struct syscall_tp *sc = evsel->priv;\
214 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
215
216 static void perf_evsel__delete_priv(struct perf_evsel *evsel)
217 {
218 zfree(&evsel->priv);
219 perf_evsel__delete(evsel);
220 }
221
222 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel, void *handler)
223 {
224 evsel->priv = malloc(sizeof(struct syscall_tp));
225 if (evsel->priv != NULL) {
226 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
227 goto out_delete;
228
229 evsel->handler = handler;
230 return 0;
231 }
232
233 return -ENOMEM;
234
235 out_delete:
236 zfree(&evsel->priv);
237 return -ENOENT;
238 }
239
240 static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void *handler)
241 {
242 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
243
244 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
245 if (IS_ERR(evsel))
246 evsel = perf_evsel__newtp("syscalls", direction);
247
248 if (IS_ERR(evsel))
249 return NULL;
250
251 if (perf_evsel__init_syscall_tp(evsel, handler))
252 goto out_delete;
253
254 return evsel;
255
256 out_delete:
257 perf_evsel__delete_priv(evsel);
258 return NULL;
259 }
260
261 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
262 ({ struct syscall_tp *fields = evsel->priv; \
263 fields->name.integer(&fields->name, sample); })
264
265 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
266 ({ struct syscall_tp *fields = evsel->priv; \
267 fields->name.pointer(&fields->name, sample); })
268
269 struct syscall_arg {
270 unsigned long val;
271 struct thread *thread;
272 struct trace *trace;
273 void *parm;
274 u8 idx;
275 u8 mask;
276 };
277
278 struct strarray {
279 int offset;
280 int nr_entries;
281 const char **entries;
282 };
283
284 #define DEFINE_STRARRAY(array) struct strarray strarray__##array = { \
285 .nr_entries = ARRAY_SIZE(array), \
286 .entries = array, \
287 }
288
289 #define DEFINE_STRARRAY_OFFSET(array, off) struct strarray strarray__##array = { \
290 .offset = off, \
291 .nr_entries = ARRAY_SIZE(array), \
292 .entries = array, \
293 }
294
295 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
296 const char *intfmt,
297 struct syscall_arg *arg)
298 {
299 struct strarray *sa = arg->parm;
300 int idx = arg->val - sa->offset;
301
302 if (idx < 0 || idx >= sa->nr_entries)
303 return scnprintf(bf, size, intfmt, arg->val);
304
305 return scnprintf(bf, size, "%s", sa->entries[idx]);
306 }
307
308 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
309 struct syscall_arg *arg)
310 {
311 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
312 }
313
314 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
315
316 #if defined(__i386__) || defined(__x86_64__)
317 /*
318 * FIXME: Make this available to all arches as soon as the ioctl beautifier
319 * gets rewritten to support all arches.
320 */
321 static size_t syscall_arg__scnprintf_strhexarray(char *bf, size_t size,
322 struct syscall_arg *arg)
323 {
324 return __syscall_arg__scnprintf_strarray(bf, size, "%#x", arg);
325 }
326
327 #define SCA_STRHEXARRAY syscall_arg__scnprintf_strhexarray
328 #endif /* defined(__i386__) || defined(__x86_64__) */
329
330 static size_t syscall_arg__scnprintf_fd(char *bf, size_t size,
331 struct syscall_arg *arg);
332
333 #define SCA_FD syscall_arg__scnprintf_fd
334
335 #ifndef AT_FDCWD
336 #define AT_FDCWD -100
337 #endif
338
339 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
340 struct syscall_arg *arg)
341 {
342 int fd = arg->val;
343
344 if (fd == AT_FDCWD)
345 return scnprintf(bf, size, "CWD");
346
347 return syscall_arg__scnprintf_fd(bf, size, arg);
348 }
349
350 #define SCA_FDAT syscall_arg__scnprintf_fd_at
351
352 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
353 struct syscall_arg *arg);
354
355 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
356
357 static size_t syscall_arg__scnprintf_hex(char *bf, size_t size,
358 struct syscall_arg *arg)
359 {
360 return scnprintf(bf, size, "%#lx", arg->val);
361 }
362
363 #define SCA_HEX syscall_arg__scnprintf_hex
364
365 static size_t syscall_arg__scnprintf_int(char *bf, size_t size,
366 struct syscall_arg *arg)
367 {
368 return scnprintf(bf, size, "%d", arg->val);
369 }
370
371 #define SCA_INT syscall_arg__scnprintf_int
372
373 static const char *bpf_cmd[] = {
374 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
375 "MAP_GET_NEXT_KEY", "PROG_LOAD",
376 };
377 static DEFINE_STRARRAY(bpf_cmd);
378
379 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
380 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
381
382 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
383 static DEFINE_STRARRAY(itimers);
384
385 static const char *keyctl_options[] = {
386 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
387 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
388 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
389 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
390 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
391 };
392 static DEFINE_STRARRAY(keyctl_options);
393
394 static const char *whences[] = { "SET", "CUR", "END",
395 #ifdef SEEK_DATA
396 "DATA",
397 #endif
398 #ifdef SEEK_HOLE
399 "HOLE",
400 #endif
401 };
402 static DEFINE_STRARRAY(whences);
403
404 static const char *fcntl_cmds[] = {
405 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
406 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "F_GETLK64",
407 "F_SETLK64", "F_SETLKW64", "F_SETOWN_EX", "F_GETOWN_EX",
408 "F_GETOWNER_UIDS",
409 };
410 static DEFINE_STRARRAY(fcntl_cmds);
411
412 static const char *rlimit_resources[] = {
413 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
414 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
415 "RTTIME",
416 };
417 static DEFINE_STRARRAY(rlimit_resources);
418
419 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
420 static DEFINE_STRARRAY(sighow);
421
422 static const char *clockid[] = {
423 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
424 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
425 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
426 };
427 static DEFINE_STRARRAY(clockid);
428
429 static const char *socket_families[] = {
430 "UNSPEC", "LOCAL", "INET", "AX25", "IPX", "APPLETALK", "NETROM",
431 "BRIDGE", "ATMPVC", "X25", "INET6", "ROSE", "DECnet", "NETBEUI",
432 "SECURITY", "KEY", "NETLINK", "PACKET", "ASH", "ECONET", "ATMSVC",
433 "RDS", "SNA", "IRDA", "PPPOX", "WANPIPE", "LLC", "IB", "CAN", "TIPC",
434 "BLUETOOTH", "IUCV", "RXRPC", "ISDN", "PHONET", "IEEE802154", "CAIF",
435 "ALG", "NFC", "VSOCK",
436 };
437 static DEFINE_STRARRAY(socket_families);
438
439 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
440 struct syscall_arg *arg)
441 {
442 size_t printed = 0;
443 int mode = arg->val;
444
445 if (mode == F_OK) /* 0 */
446 return scnprintf(bf, size, "F");
447 #define P_MODE(n) \
448 if (mode & n##_OK) { \
449 printed += scnprintf(bf + printed, size - printed, "%s", #n); \
450 mode &= ~n##_OK; \
451 }
452
453 P_MODE(R);
454 P_MODE(W);
455 P_MODE(X);
456 #undef P_MODE
457
458 if (mode)
459 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
460
461 return printed;
462 }
463
464 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
465
466 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
467 struct syscall_arg *arg);
468
469 #define SCA_FILENAME syscall_arg__scnprintf_filename
470
471 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
472 struct syscall_arg *arg)
473 {
474 int printed = 0, flags = arg->val;
475
476 #define P_FLAG(n) \
477 if (flags & O_##n) { \
478 printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
479 flags &= ~O_##n; \
480 }
481
482 P_FLAG(CLOEXEC);
483 P_FLAG(NONBLOCK);
484 #undef P_FLAG
485
486 if (flags)
487 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
488
489 return printed;
490 }
491
492 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
493
494 #if defined(__i386__) || defined(__x86_64__)
495 /*
496 * FIXME: Make this available to all arches.
497 */
498 #define TCGETS 0x5401
499
500 static const char *tioctls[] = {
501 "TCGETS", "TCSETS", "TCSETSW", "TCSETSF", "TCGETA", "TCSETA", "TCSETAW",
502 "TCSETAF", "TCSBRK", "TCXONC", "TCFLSH", "TIOCEXCL", "TIOCNXCL",
503 "TIOCSCTTY", "TIOCGPGRP", "TIOCSPGRP", "TIOCOUTQ", "TIOCSTI",
504 "TIOCGWINSZ", "TIOCSWINSZ", "TIOCMGET", "TIOCMBIS", "TIOCMBIC",
505 "TIOCMSET", "TIOCGSOFTCAR", "TIOCSSOFTCAR", "FIONREAD", "TIOCLINUX",
506 "TIOCCONS", "TIOCGSERIAL", "TIOCSSERIAL", "TIOCPKT", "FIONBIO",
507 "TIOCNOTTY", "TIOCSETD", "TIOCGETD", "TCSBRKP", [0x27] = "TIOCSBRK",
508 "TIOCCBRK", "TIOCGSID", "TCGETS2", "TCSETS2", "TCSETSW2", "TCSETSF2",
509 "TIOCGRS485", "TIOCSRS485", "TIOCGPTN", "TIOCSPTLCK",
510 "TIOCGDEV||TCGETX", "TCSETX", "TCSETXF", "TCSETXW", "TIOCSIG",
511 "TIOCVHANGUP", "TIOCGPKT", "TIOCGPTLCK", "TIOCGEXCL",
512 [0x50] = "FIONCLEX", "FIOCLEX", "FIOASYNC", "TIOCSERCONFIG",
513 "TIOCSERGWILD", "TIOCSERSWILD", "TIOCGLCKTRMIOS", "TIOCSLCKTRMIOS",
514 "TIOCSERGSTRUCT", "TIOCSERGETLSR", "TIOCSERGETMULTI", "TIOCSERSETMULTI",
515 "TIOCMIWAIT", "TIOCGICOUNT", [0x60] = "FIOQSIZE",
516 };
517
518 static DEFINE_STRARRAY_OFFSET(tioctls, 0x5401);
519 #endif /* defined(__i386__) || defined(__x86_64__) */
520
521 #ifndef GRND_NONBLOCK
522 #define GRND_NONBLOCK 0x0001
523 #endif
524 #ifndef GRND_RANDOM
525 #define GRND_RANDOM 0x0002
526 #endif
527
528 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
529 struct syscall_arg *arg)
530 {
531 int printed = 0, flags = arg->val;
532
533 #define P_FLAG(n) \
534 if (flags & GRND_##n) { \
535 printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
536 flags &= ~GRND_##n; \
537 }
538
539 P_FLAG(RANDOM);
540 P_FLAG(NONBLOCK);
541 #undef P_FLAG
542
543 if (flags)
544 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
545
546 return printed;
547 }
548
549 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
550
551 #define STRARRAY(arg, name, array) \
552 .arg_scnprintf = { [arg] = SCA_STRARRAY, }, \
553 .arg_parm = { [arg] = &strarray__##array, }
554
555 #include "trace/beauty/eventfd.c"
556 #include "trace/beauty/flock.c"
557 #include "trace/beauty/futex_op.c"
558 #include "trace/beauty/mmap.c"
559 #include "trace/beauty/mode_t.c"
560 #include "trace/beauty/msg_flags.c"
561 #include "trace/beauty/open_flags.c"
562 #include "trace/beauty/perf_event_open.c"
563 #include "trace/beauty/pid.c"
564 #include "trace/beauty/sched_policy.c"
565 #include "trace/beauty/seccomp.c"
566 #include "trace/beauty/signum.c"
567 #include "trace/beauty/socket_type.c"
568 #include "trace/beauty/waitid_options.c"
569
570 static struct syscall_fmt {
571 const char *name;
572 const char *alias;
573 size_t (*arg_scnprintf[6])(char *bf, size_t size, struct syscall_arg *arg);
574 void *arg_parm[6];
575 bool errmsg;
576 bool errpid;
577 bool timeout;
578 bool hexret;
579 } syscall_fmts[] = {
580 { .name = "access", .errmsg = true,
581 .arg_scnprintf = { [1] = SCA_ACCMODE, /* mode */ }, },
582 { .name = "arch_prctl", .errmsg = true, .alias = "prctl", },
583 { .name = "bpf", .errmsg = true, STRARRAY(0, cmd, bpf_cmd), },
584 { .name = "brk", .hexret = true,
585 .arg_scnprintf = { [0] = SCA_HEX, /* brk */ }, },
586 { .name = "chdir", .errmsg = true, },
587 { .name = "chmod", .errmsg = true, },
588 { .name = "chroot", .errmsg = true, },
589 { .name = "clock_gettime", .errmsg = true, STRARRAY(0, clk_id, clockid), },
590 { .name = "clone", .errpid = true, },
591 { .name = "close", .errmsg = true,
592 .arg_scnprintf = { [0] = SCA_CLOSE_FD, /* fd */ }, },
593 { .name = "connect", .errmsg = true, },
594 { .name = "creat", .errmsg = true, },
595 { .name = "dup", .errmsg = true, },
596 { .name = "dup2", .errmsg = true, },
597 { .name = "dup3", .errmsg = true, },
598 { .name = "epoll_ctl", .errmsg = true, STRARRAY(1, op, epoll_ctl_ops), },
599 { .name = "eventfd2", .errmsg = true,
600 .arg_scnprintf = { [1] = SCA_EFD_FLAGS, /* flags */ }, },
601 { .name = "faccessat", .errmsg = true, },
602 { .name = "fadvise64", .errmsg = true, },
603 { .name = "fallocate", .errmsg = true, },
604 { .name = "fchdir", .errmsg = true, },
605 { .name = "fchmod", .errmsg = true, },
606 { .name = "fchmodat", .errmsg = true,
607 .arg_scnprintf = { [0] = SCA_FDAT, /* fd */ }, },
608 { .name = "fchown", .errmsg = true, },
609 { .name = "fchownat", .errmsg = true,
610 .arg_scnprintf = { [0] = SCA_FDAT, /* fd */ }, },
611 { .name = "fcntl", .errmsg = true,
612 .arg_scnprintf = { [1] = SCA_STRARRAY, /* cmd */ },
613 .arg_parm = { [1] = &strarray__fcntl_cmds, /* cmd */ }, },
614 { .name = "fdatasync", .errmsg = true, },
615 { .name = "flock", .errmsg = true,
616 .arg_scnprintf = { [1] = SCA_FLOCK, /* cmd */ }, },
617 { .name = "fsetxattr", .errmsg = true, },
618 { .name = "fstat", .errmsg = true, .alias = "newfstat", },
619 { .name = "fstatat", .errmsg = true, .alias = "newfstatat", },
620 { .name = "fstatfs", .errmsg = true, },
621 { .name = "fsync", .errmsg = true, },
622 { .name = "ftruncate", .errmsg = true, },
623 { .name = "futex", .errmsg = true,
624 .arg_scnprintf = { [1] = SCA_FUTEX_OP, /* op */ }, },
625 { .name = "futimesat", .errmsg = true,
626 .arg_scnprintf = { [0] = SCA_FDAT, /* fd */ }, },
627 { .name = "getdents", .errmsg = true, },
628 { .name = "getdents64", .errmsg = true, },
629 { .name = "getitimer", .errmsg = true, STRARRAY(0, which, itimers), },
630 { .name = "getpid", .errpid = true, },
631 { .name = "getpgid", .errpid = true, },
632 { .name = "getppid", .errpid = true, },
633 { .name = "getrandom", .errmsg = true,
634 .arg_scnprintf = { [2] = SCA_GETRANDOM_FLAGS, /* flags */ }, },
635 { .name = "getrlimit", .errmsg = true, STRARRAY(0, resource, rlimit_resources), },
636 { .name = "getxattr", .errmsg = true, },
637 { .name = "inotify_add_watch", .errmsg = true, },
638 { .name = "ioctl", .errmsg = true,
639 .arg_scnprintf = {
640 #if defined(__i386__) || defined(__x86_64__)
641 /*
642 * FIXME: Make this available to all arches.
643 */
644 [1] = SCA_STRHEXARRAY, /* cmd */
645 [2] = SCA_HEX, /* arg */ },
646 .arg_parm = { [1] = &strarray__tioctls, /* cmd */ }, },
647 #else
648 [2] = SCA_HEX, /* arg */ }, },
649 #endif
650 { .name = "keyctl", .errmsg = true, STRARRAY(0, option, keyctl_options), },
651 { .name = "kill", .errmsg = true,
652 .arg_scnprintf = { [1] = SCA_SIGNUM, /* sig */ }, },
653 { .name = "lchown", .errmsg = true, },
654 { .name = "lgetxattr", .errmsg = true, },
655 { .name = "linkat", .errmsg = true,
656 .arg_scnprintf = { [0] = SCA_FDAT, /* fd */ }, },
657 { .name = "listxattr", .errmsg = true, },
658 { .name = "llistxattr", .errmsg = true, },
659 { .name = "lremovexattr", .errmsg = true, },
660 { .name = "lseek", .errmsg = true,
661 .arg_scnprintf = { [2] = SCA_STRARRAY, /* whence */ },
662 .arg_parm = { [2] = &strarray__whences, /* whence */ }, },
663 { .name = "lsetxattr", .errmsg = true, },
664 { .name = "lstat", .errmsg = true, .alias = "newlstat", },
665 { .name = "lsxattr", .errmsg = true, },
666 { .name = "madvise", .errmsg = true,
667 .arg_scnprintf = { [0] = SCA_HEX, /* start */
668 [2] = SCA_MADV_BHV, /* behavior */ }, },
669 { .name = "mkdir", .errmsg = true, },
670 { .name = "mkdirat", .errmsg = true,
671 .arg_scnprintf = { [0] = SCA_FDAT, /* fd */ }, },
672 { .name = "mknod", .errmsg = true, },
673 { .name = "mknodat", .errmsg = true,
674 .arg_scnprintf = { [0] = SCA_FDAT, /* fd */ }, },
675 { .name = "mlock", .errmsg = true,
676 .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
677 { .name = "mlockall", .errmsg = true,
678 .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
679 { .name = "mmap", .hexret = true,
680 .arg_scnprintf = { [0] = SCA_HEX, /* addr */
681 [2] = SCA_MMAP_PROT, /* prot */
682 [3] = SCA_MMAP_FLAGS, /* flags */ }, },
683 { .name = "mprotect", .errmsg = true,
684 .arg_scnprintf = { [0] = SCA_HEX, /* start */
685 [2] = SCA_MMAP_PROT, /* prot */ }, },
686 { .name = "mq_unlink", .errmsg = true,
687 .arg_scnprintf = { [0] = SCA_FILENAME, /* u_name */ }, },
688 { .name = "mremap", .hexret = true,
689 .arg_scnprintf = { [0] = SCA_HEX, /* addr */
690 [3] = SCA_MREMAP_FLAGS, /* flags */
691 [4] = SCA_HEX, /* new_addr */ }, },
692 { .name = "munlock", .errmsg = true,
693 .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
694 { .name = "munmap", .errmsg = true,
695 .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
696 { .name = "name_to_handle_at", .errmsg = true,
697 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */ }, },
698 { .name = "newfstatat", .errmsg = true,
699 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */ }, },
700 { .name = "open", .errmsg = true,
701 .arg_scnprintf = { [1] = SCA_OPEN_FLAGS, /* flags */ }, },
702 { .name = "open_by_handle_at", .errmsg = true,
703 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */
704 [2] = SCA_OPEN_FLAGS, /* flags */ }, },
705 { .name = "openat", .errmsg = true,
706 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */
707 [2] = SCA_OPEN_FLAGS, /* flags */ }, },
708 { .name = "perf_event_open", .errmsg = true,
709 .arg_scnprintf = { [2] = SCA_INT, /* cpu */
710 [3] = SCA_FD, /* group_fd */
711 [4] = SCA_PERF_FLAGS, /* flags */ }, },
712 { .name = "pipe2", .errmsg = true,
713 .arg_scnprintf = { [1] = SCA_PIPE_FLAGS, /* flags */ }, },
714 { .name = "poll", .errmsg = true, .timeout = true, },
715 { .name = "ppoll", .errmsg = true, .timeout = true, },
716 { .name = "pread", .errmsg = true, .alias = "pread64", },
717 { .name = "preadv", .errmsg = true, .alias = "pread", },
718 { .name = "prlimit64", .errmsg = true, STRARRAY(1, resource, rlimit_resources), },
719 { .name = "pwrite", .errmsg = true, .alias = "pwrite64", },
720 { .name = "pwritev", .errmsg = true, },
721 { .name = "read", .errmsg = true, },
722 { .name = "readlink", .errmsg = true, },
723 { .name = "readlinkat", .errmsg = true,
724 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */ }, },
725 { .name = "readv", .errmsg = true, },
726 { .name = "recvfrom", .errmsg = true,
727 .arg_scnprintf = { [3] = SCA_MSG_FLAGS, /* flags */ }, },
728 { .name = "recvmmsg", .errmsg = true,
729 .arg_scnprintf = { [3] = SCA_MSG_FLAGS, /* flags */ }, },
730 { .name = "recvmsg", .errmsg = true,
731 .arg_scnprintf = { [2] = SCA_MSG_FLAGS, /* flags */ }, },
732 { .name = "removexattr", .errmsg = true, },
733 { .name = "renameat", .errmsg = true,
734 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */ }, },
735 { .name = "rmdir", .errmsg = true, },
736 { .name = "rt_sigaction", .errmsg = true,
737 .arg_scnprintf = { [0] = SCA_SIGNUM, /* sig */ }, },
738 { .name = "rt_sigprocmask", .errmsg = true, STRARRAY(0, how, sighow), },
739 { .name = "rt_sigqueueinfo", .errmsg = true,
740 .arg_scnprintf = { [1] = SCA_SIGNUM, /* sig */ }, },
741 { .name = "rt_tgsigqueueinfo", .errmsg = true,
742 .arg_scnprintf = { [2] = SCA_SIGNUM, /* sig */ }, },
743 { .name = "sched_getattr", .errmsg = true, },
744 { .name = "sched_setattr", .errmsg = true, },
745 { .name = "sched_setscheduler", .errmsg = true,
746 .arg_scnprintf = { [1] = SCA_SCHED_POLICY, /* policy */ }, },
747 { .name = "seccomp", .errmsg = true,
748 .arg_scnprintf = { [0] = SCA_SECCOMP_OP, /* op */
749 [1] = SCA_SECCOMP_FLAGS, /* flags */ }, },
750 { .name = "select", .errmsg = true, .timeout = true, },
751 { .name = "sendmmsg", .errmsg = true,
752 .arg_scnprintf = { [3] = SCA_MSG_FLAGS, /* flags */ }, },
753 { .name = "sendmsg", .errmsg = true,
754 .arg_scnprintf = { [2] = SCA_MSG_FLAGS, /* flags */ }, },
755 { .name = "sendto", .errmsg = true,
756 .arg_scnprintf = { [3] = SCA_MSG_FLAGS, /* flags */ }, },
757 { .name = "set_tid_address", .errpid = true, },
758 { .name = "setitimer", .errmsg = true, STRARRAY(0, which, itimers), },
759 { .name = "setpgid", .errmsg = true, },
760 { .name = "setrlimit", .errmsg = true, STRARRAY(0, resource, rlimit_resources), },
761 { .name = "setxattr", .errmsg = true, },
762 { .name = "shutdown", .errmsg = true, },
763 { .name = "socket", .errmsg = true,
764 .arg_scnprintf = { [0] = SCA_STRARRAY, /* family */
765 [1] = SCA_SK_TYPE, /* type */ },
766 .arg_parm = { [0] = &strarray__socket_families, /* family */ }, },
767 { .name = "socketpair", .errmsg = true,
768 .arg_scnprintf = { [0] = SCA_STRARRAY, /* family */
769 [1] = SCA_SK_TYPE, /* type */ },
770 .arg_parm = { [0] = &strarray__socket_families, /* family */ }, },
771 { .name = "stat", .errmsg = true, .alias = "newstat", },
772 { .name = "statfs", .errmsg = true, },
773 { .name = "swapoff", .errmsg = true,
774 .arg_scnprintf = { [0] = SCA_FILENAME, /* specialfile */ }, },
775 { .name = "swapon", .errmsg = true,
776 .arg_scnprintf = { [0] = SCA_FILENAME, /* specialfile */ }, },
777 { .name = "symlinkat", .errmsg = true,
778 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */ }, },
779 { .name = "tgkill", .errmsg = true,
780 .arg_scnprintf = { [2] = SCA_SIGNUM, /* sig */ }, },
781 { .name = "tkill", .errmsg = true,
782 .arg_scnprintf = { [1] = SCA_SIGNUM, /* sig */ }, },
783 { .name = "truncate", .errmsg = true, },
784 { .name = "uname", .errmsg = true, .alias = "newuname", },
785 { .name = "unlinkat", .errmsg = true,
786 .arg_scnprintf = { [0] = SCA_FDAT, /* dfd */ }, },
787 { .name = "utime", .errmsg = true, },
788 { .name = "utimensat", .errmsg = true,
789 .arg_scnprintf = { [0] = SCA_FDAT, /* dirfd */ }, },
790 { .name = "utimes", .errmsg = true, },
791 { .name = "vmsplice", .errmsg = true, },
792 { .name = "wait4", .errpid = true,
793 .arg_scnprintf = { [2] = SCA_WAITID_OPTIONS, /* options */ }, },
794 { .name = "waitid", .errpid = true,
795 .arg_scnprintf = { [3] = SCA_WAITID_OPTIONS, /* options */ }, },
796 { .name = "write", .errmsg = true, },
797 { .name = "writev", .errmsg = true, },
798 };
799
800 static int syscall_fmt__cmp(const void *name, const void *fmtp)
801 {
802 const struct syscall_fmt *fmt = fmtp;
803 return strcmp(name, fmt->name);
804 }
805
806 static struct syscall_fmt *syscall_fmt__find(const char *name)
807 {
808 const int nmemb = ARRAY_SIZE(syscall_fmts);
809 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
810 }
811
812 struct syscall {
813 struct event_format *tp_format;
814 int nr_args;
815 struct format_field *args;
816 const char *name;
817 bool is_exit;
818 struct syscall_fmt *fmt;
819 size_t (**arg_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
820 void **arg_parm;
821 };
822
823 static size_t fprintf_duration(unsigned long t, FILE *fp)
824 {
825 double duration = (double)t / NSEC_PER_MSEC;
826 size_t printed = fprintf(fp, "(");
827
828 if (duration >= 1.0)
829 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
830 else if (duration >= 0.01)
831 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
832 else
833 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
834 return printed + fprintf(fp, "): ");
835 }
836
837 /**
838 * filename.ptr: The filename char pointer that will be vfs_getname'd
839 * filename.entry_str_pos: Where to insert the string translated from
840 * filename.ptr by the vfs_getname tracepoint/kprobe.
841 */
842 struct thread_trace {
843 u64 entry_time;
844 bool entry_pending;
845 unsigned long nr_events;
846 unsigned long pfmaj, pfmin;
847 char *entry_str;
848 double runtime_ms;
849 struct {
850 unsigned long ptr;
851 short int entry_str_pos;
852 bool pending_open;
853 unsigned int namelen;
854 char *name;
855 } filename;
856 struct {
857 int max;
858 char **table;
859 } paths;
860
861 struct intlist *syscall_stats;
862 };
863
864 static struct thread_trace *thread_trace__new(void)
865 {
866 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
867
868 if (ttrace)
869 ttrace->paths.max = -1;
870
871 ttrace->syscall_stats = intlist__new(NULL);
872
873 return ttrace;
874 }
875
876 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
877 {
878 struct thread_trace *ttrace;
879
880 if (thread == NULL)
881 goto fail;
882
883 if (thread__priv(thread) == NULL)
884 thread__set_priv(thread, thread_trace__new());
885
886 if (thread__priv(thread) == NULL)
887 goto fail;
888
889 ttrace = thread__priv(thread);
890 ++ttrace->nr_events;
891
892 return ttrace;
893 fail:
894 color_fprintf(fp, PERF_COLOR_RED,
895 "WARNING: not enough memory, dropping samples!\n");
896 return NULL;
897 }
898
899 #define TRACE_PFMAJ (1 << 0)
900 #define TRACE_PFMIN (1 << 1)
901
902 static const size_t trace__entry_str_size = 2048;
903
904 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
905 {
906 struct thread_trace *ttrace = thread__priv(thread);
907
908 if (fd > ttrace->paths.max) {
909 char **npath = realloc(ttrace->paths.table, (fd + 1) * sizeof(char *));
910
911 if (npath == NULL)
912 return -1;
913
914 if (ttrace->paths.max != -1) {
915 memset(npath + ttrace->paths.max + 1, 0,
916 (fd - ttrace->paths.max) * sizeof(char *));
917 } else {
918 memset(npath, 0, (fd + 1) * sizeof(char *));
919 }
920
921 ttrace->paths.table = npath;
922 ttrace->paths.max = fd;
923 }
924
925 ttrace->paths.table[fd] = strdup(pathname);
926
927 return ttrace->paths.table[fd] != NULL ? 0 : -1;
928 }
929
930 static int thread__read_fd_path(struct thread *thread, int fd)
931 {
932 char linkname[PATH_MAX], pathname[PATH_MAX];
933 struct stat st;
934 int ret;
935
936 if (thread->pid_ == thread->tid) {
937 scnprintf(linkname, sizeof(linkname),
938 "/proc/%d/fd/%d", thread->pid_, fd);
939 } else {
940 scnprintf(linkname, sizeof(linkname),
941 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
942 }
943
944 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
945 return -1;
946
947 ret = readlink(linkname, pathname, sizeof(pathname));
948
949 if (ret < 0 || ret > st.st_size)
950 return -1;
951
952 pathname[ret] = '\0';
953 return trace__set_fd_pathname(thread, fd, pathname);
954 }
955
956 static const char *thread__fd_path(struct thread *thread, int fd,
957 struct trace *trace)
958 {
959 struct thread_trace *ttrace = thread__priv(thread);
960
961 if (ttrace == NULL)
962 return NULL;
963
964 if (fd < 0)
965 return NULL;
966
967 if ((fd > ttrace->paths.max || ttrace->paths.table[fd] == NULL)) {
968 if (!trace->live)
969 return NULL;
970 ++trace->stats.proc_getname;
971 if (thread__read_fd_path(thread, fd))
972 return NULL;
973 }
974
975 return ttrace->paths.table[fd];
976 }
977
978 static size_t syscall_arg__scnprintf_fd(char *bf, size_t size,
979 struct syscall_arg *arg)
980 {
981 int fd = arg->val;
982 size_t printed = scnprintf(bf, size, "%d", fd);
983 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
984
985 if (path)
986 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
987
988 return printed;
989 }
990
991 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
992 struct syscall_arg *arg)
993 {
994 int fd = arg->val;
995 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
996 struct thread_trace *ttrace = thread__priv(arg->thread);
997
998 if (ttrace && fd >= 0 && fd <= ttrace->paths.max)
999 zfree(&ttrace->paths.table[fd]);
1000
1001 return printed;
1002 }
1003
1004 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1005 unsigned long ptr)
1006 {
1007 struct thread_trace *ttrace = thread__priv(thread);
1008
1009 ttrace->filename.ptr = ptr;
1010 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1011 }
1012
1013 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1014 struct syscall_arg *arg)
1015 {
1016 unsigned long ptr = arg->val;
1017
1018 if (!arg->trace->vfs_getname)
1019 return scnprintf(bf, size, "%#x", ptr);
1020
1021 thread__set_filename_pos(arg->thread, bf, ptr);
1022 return 0;
1023 }
1024
1025 static bool trace__filter_duration(struct trace *trace, double t)
1026 {
1027 return t < (trace->duration_filter * NSEC_PER_MSEC);
1028 }
1029
1030 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1031 {
1032 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1033
1034 return fprintf(fp, "%10.3f ", ts);
1035 }
1036
1037 static bool done = false;
1038 static bool interrupted = false;
1039
1040 static void sig_handler(int sig)
1041 {
1042 done = true;
1043 interrupted = sig == SIGINT;
1044 }
1045
1046 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1047 u64 duration, u64 tstamp, FILE *fp)
1048 {
1049 size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
1050 printed += fprintf_duration(duration, fp);
1051
1052 if (trace->multiple_threads) {
1053 if (trace->show_comm)
1054 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1055 printed += fprintf(fp, "%d ", thread->tid);
1056 }
1057
1058 return printed;
1059 }
1060
1061 static int trace__process_event(struct trace *trace, struct machine *machine,
1062 union perf_event *event, struct perf_sample *sample)
1063 {
1064 int ret = 0;
1065
1066 switch (event->header.type) {
1067 case PERF_RECORD_LOST:
1068 color_fprintf(trace->output, PERF_COLOR_RED,
1069 "LOST %" PRIu64 " events!\n", event->lost.lost);
1070 ret = machine__process_lost_event(machine, event, sample);
1071 break;
1072 default:
1073 ret = machine__process_event(machine, event, sample);
1074 break;
1075 }
1076
1077 return ret;
1078 }
1079
1080 static int trace__tool_process(struct perf_tool *tool,
1081 union perf_event *event,
1082 struct perf_sample *sample,
1083 struct machine *machine)
1084 {
1085 struct trace *trace = container_of(tool, struct trace, tool);
1086 return trace__process_event(trace, machine, event, sample);
1087 }
1088
1089 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1090 {
1091 struct machine *machine = vmachine;
1092
1093 if (machine->kptr_restrict_warned)
1094 return NULL;
1095
1096 if (symbol_conf.kptr_restrict) {
1097 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1098 "Check /proc/sys/kernel/kptr_restrict.\n\n"
1099 "Kernel samples will not be resolved.\n");
1100 machine->kptr_restrict_warned = true;
1101 return NULL;
1102 }
1103
1104 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1105 }
1106
1107 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
1108 {
1109 int err = symbol__init(NULL);
1110
1111 if (err)
1112 return err;
1113
1114 trace->host = machine__new_host();
1115 if (trace->host == NULL)
1116 return -ENOMEM;
1117
1118 if (trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr) < 0)
1119 return -errno;
1120
1121 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1122 evlist->threads, trace__tool_process, false,
1123 trace->opts.proc_map_timeout);
1124 if (err)
1125 symbol__exit();
1126
1127 return err;
1128 }
1129
1130 static int syscall__set_arg_fmts(struct syscall *sc)
1131 {
1132 struct format_field *field;
1133 int idx = 0, len;
1134
1135 sc->arg_scnprintf = calloc(sc->nr_args, sizeof(void *));
1136 if (sc->arg_scnprintf == NULL)
1137 return -1;
1138
1139 if (sc->fmt)
1140 sc->arg_parm = sc->fmt->arg_parm;
1141
1142 for (field = sc->args; field; field = field->next) {
1143 if (sc->fmt && sc->fmt->arg_scnprintf[idx])
1144 sc->arg_scnprintf[idx] = sc->fmt->arg_scnprintf[idx];
1145 else if (strcmp(field->type, "const char *") == 0 &&
1146 (strcmp(field->name, "filename") == 0 ||
1147 strcmp(field->name, "path") == 0 ||
1148 strcmp(field->name, "pathname") == 0))
1149 sc->arg_scnprintf[idx] = SCA_FILENAME;
1150 else if (field->flags & FIELD_IS_POINTER)
1151 sc->arg_scnprintf[idx] = syscall_arg__scnprintf_hex;
1152 else if (strcmp(field->type, "pid_t") == 0)
1153 sc->arg_scnprintf[idx] = SCA_PID;
1154 else if (strcmp(field->type, "umode_t") == 0)
1155 sc->arg_scnprintf[idx] = SCA_MODE_T;
1156 else if ((strcmp(field->type, "int") == 0 ||
1157 strcmp(field->type, "unsigned int") == 0 ||
1158 strcmp(field->type, "long") == 0) &&
1159 (len = strlen(field->name)) >= 2 &&
1160 strcmp(field->name + len - 2, "fd") == 0) {
1161 /*
1162 * /sys/kernel/tracing/events/syscalls/sys_enter*
1163 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1164 * 65 int
1165 * 23 unsigned int
1166 * 7 unsigned long
1167 */
1168 sc->arg_scnprintf[idx] = SCA_FD;
1169 }
1170 ++idx;
1171 }
1172
1173 return 0;
1174 }
1175
1176 static int trace__read_syscall_info(struct trace *trace, int id)
1177 {
1178 char tp_name[128];
1179 struct syscall *sc;
1180 const char *name = syscalltbl__name(trace->sctbl, id);
1181
1182 if (name == NULL)
1183 return -1;
1184
1185 if (id > trace->syscalls.max) {
1186 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1187
1188 if (nsyscalls == NULL)
1189 return -1;
1190
1191 if (trace->syscalls.max != -1) {
1192 memset(nsyscalls + trace->syscalls.max + 1, 0,
1193 (id - trace->syscalls.max) * sizeof(*sc));
1194 } else {
1195 memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
1196 }
1197
1198 trace->syscalls.table = nsyscalls;
1199 trace->syscalls.max = id;
1200 }
1201
1202 sc = trace->syscalls.table + id;
1203 sc->name = name;
1204
1205 sc->fmt = syscall_fmt__find(sc->name);
1206
1207 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1208 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1209
1210 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1211 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1212 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1213 }
1214
1215 if (IS_ERR(sc->tp_format))
1216 return -1;
1217
1218 sc->args = sc->tp_format->format.fields;
1219 sc->nr_args = sc->tp_format->format.nr_fields;
1220 /*
1221 * We need to check and discard the first variable '__syscall_nr'
1222 * or 'nr' that mean the syscall number. It is needless here.
1223 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1224 */
1225 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1226 sc->args = sc->args->next;
1227 --sc->nr_args;
1228 }
1229
1230 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1231
1232 return syscall__set_arg_fmts(sc);
1233 }
1234
1235 static int trace__validate_ev_qualifier(struct trace *trace)
1236 {
1237 int err = 0, i;
1238 struct str_node *pos;
1239
1240 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
1241 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
1242 sizeof(trace->ev_qualifier_ids.entries[0]));
1243
1244 if (trace->ev_qualifier_ids.entries == NULL) {
1245 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1246 trace->output);
1247 err = -EINVAL;
1248 goto out;
1249 }
1250
1251 i = 0;
1252
1253 strlist__for_each_entry(pos, trace->ev_qualifier) {
1254 const char *sc = pos->s;
1255 int id = syscalltbl__id(trace->sctbl, sc);
1256
1257 if (id < 0) {
1258 if (err == 0) {
1259 fputs("Error:\tInvalid syscall ", trace->output);
1260 err = -EINVAL;
1261 } else {
1262 fputs(", ", trace->output);
1263 }
1264
1265 fputs(sc, trace->output);
1266 }
1267
1268 trace->ev_qualifier_ids.entries[i++] = id;
1269 }
1270
1271 if (err < 0) {
1272 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
1273 "\nHint:\tand: 'man syscalls'\n", trace->output);
1274 zfree(&trace->ev_qualifier_ids.entries);
1275 trace->ev_qualifier_ids.nr = 0;
1276 }
1277 out:
1278 return err;
1279 }
1280
1281 /*
1282 * args is to be interpreted as a series of longs but we need to handle
1283 * 8-byte unaligned accesses. args points to raw_data within the event
1284 * and raw_data is guaranteed to be 8-byte unaligned because it is
1285 * preceded by raw_size which is a u32. So we need to copy args to a temp
1286 * variable to read it. Most notably this avoids extended load instructions
1287 * on unaligned addresses
1288 */
1289
1290 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1291 unsigned char *args, struct trace *trace,
1292 struct thread *thread)
1293 {
1294 size_t printed = 0;
1295 unsigned char *p;
1296 unsigned long val;
1297
1298 if (sc->args != NULL) {
1299 struct format_field *field;
1300 u8 bit = 1;
1301 struct syscall_arg arg = {
1302 .idx = 0,
1303 .mask = 0,
1304 .trace = trace,
1305 .thread = thread,
1306 };
1307
1308 for (field = sc->args; field;
1309 field = field->next, ++arg.idx, bit <<= 1) {
1310 if (arg.mask & bit)
1311 continue;
1312
1313 /* special care for unaligned accesses */
1314 p = args + sizeof(unsigned long) * arg.idx;
1315 memcpy(&val, p, sizeof(val));
1316
1317 /*
1318 * Suppress this argument if its value is zero and
1319 * and we don't have a string associated in an
1320 * strarray for it.
1321 */
1322 if (val == 0 &&
1323 !(sc->arg_scnprintf &&
1324 sc->arg_scnprintf[arg.idx] == SCA_STRARRAY &&
1325 sc->arg_parm[arg.idx]))
1326 continue;
1327
1328 printed += scnprintf(bf + printed, size - printed,
1329 "%s%s: ", printed ? ", " : "", field->name);
1330 if (sc->arg_scnprintf && sc->arg_scnprintf[arg.idx]) {
1331 arg.val = val;
1332 if (sc->arg_parm)
1333 arg.parm = sc->arg_parm[arg.idx];
1334 printed += sc->arg_scnprintf[arg.idx](bf + printed,
1335 size - printed, &arg);
1336 } else {
1337 printed += scnprintf(bf + printed, size - printed,
1338 "%ld", val);
1339 }
1340 }
1341 } else if (IS_ERR(sc->tp_format)) {
1342 /*
1343 * If we managed to read the tracepoint /format file, then we
1344 * may end up not having any args, like with gettid(), so only
1345 * print the raw args when we didn't manage to read it.
1346 */
1347 int i = 0;
1348
1349 while (i < 6) {
1350 /* special care for unaligned accesses */
1351 p = args + sizeof(unsigned long) * i;
1352 memcpy(&val, p, sizeof(val));
1353 printed += scnprintf(bf + printed, size - printed,
1354 "%sarg%d: %ld",
1355 printed ? ", " : "", i, val);
1356 ++i;
1357 }
1358 }
1359
1360 return printed;
1361 }
1362
1363 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
1364 union perf_event *event,
1365 struct perf_sample *sample);
1366
1367 static struct syscall *trace__syscall_info(struct trace *trace,
1368 struct perf_evsel *evsel, int id)
1369 {
1370
1371 if (id < 0) {
1372
1373 /*
1374 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1375 * before that, leaving at a higher verbosity level till that is
1376 * explained. Reproduced with plain ftrace with:
1377 *
1378 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1379 * grep "NR -1 " /t/trace_pipe
1380 *
1381 * After generating some load on the machine.
1382 */
1383 if (verbose > 1) {
1384 static u64 n;
1385 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1386 id, perf_evsel__name(evsel), ++n);
1387 }
1388 return NULL;
1389 }
1390
1391 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
1392 trace__read_syscall_info(trace, id))
1393 goto out_cant_read;
1394
1395 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
1396 goto out_cant_read;
1397
1398 return &trace->syscalls.table[id];
1399
1400 out_cant_read:
1401 if (verbose) {
1402 fprintf(trace->output, "Problems reading syscall %d", id);
1403 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
1404 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1405 fputs(" information\n", trace->output);
1406 }
1407 return NULL;
1408 }
1409
1410 static void thread__update_stats(struct thread_trace *ttrace,
1411 int id, struct perf_sample *sample)
1412 {
1413 struct int_node *inode;
1414 struct stats *stats;
1415 u64 duration = 0;
1416
1417 inode = intlist__findnew(ttrace->syscall_stats, id);
1418 if (inode == NULL)
1419 return;
1420
1421 stats = inode->priv;
1422 if (stats == NULL) {
1423 stats = malloc(sizeof(struct stats));
1424 if (stats == NULL)
1425 return;
1426 init_stats(stats);
1427 inode->priv = stats;
1428 }
1429
1430 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1431 duration = sample->time - ttrace->entry_time;
1432
1433 update_stats(stats, duration);
1434 }
1435
1436 static int trace__printf_interrupted_entry(struct trace *trace, struct perf_sample *sample)
1437 {
1438 struct thread_trace *ttrace;
1439 u64 duration;
1440 size_t printed;
1441
1442 if (trace->current == NULL)
1443 return 0;
1444
1445 ttrace = thread__priv(trace->current);
1446
1447 if (!ttrace->entry_pending)
1448 return 0;
1449
1450 duration = sample->time - ttrace->entry_time;
1451
1452 printed = trace__fprintf_entry_head(trace, trace->current, duration, ttrace->entry_time, trace->output);
1453 printed += fprintf(trace->output, "%-70s) ...\n", ttrace->entry_str);
1454 ttrace->entry_pending = false;
1455
1456 return printed;
1457 }
1458
1459 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
1460 union perf_event *event __maybe_unused,
1461 struct perf_sample *sample)
1462 {
1463 char *msg;
1464 void *args;
1465 size_t printed = 0;
1466 struct thread *thread;
1467 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1468 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1469 struct thread_trace *ttrace;
1470
1471 if (sc == NULL)
1472 return -1;
1473
1474 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1475 ttrace = thread__trace(thread, trace->output);
1476 if (ttrace == NULL)
1477 goto out_put;
1478
1479 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1480
1481 if (ttrace->entry_str == NULL) {
1482 ttrace->entry_str = malloc(trace__entry_str_size);
1483 if (!ttrace->entry_str)
1484 goto out_put;
1485 }
1486
1487 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1488 trace__printf_interrupted_entry(trace, sample);
1489
1490 ttrace->entry_time = sample->time;
1491 msg = ttrace->entry_str;
1492 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1493
1494 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1495 args, trace, thread);
1496
1497 if (sc->is_exit) {
1498 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) {
1499 trace__fprintf_entry_head(trace, thread, 1, ttrace->entry_time, trace->output);
1500 fprintf(trace->output, "%-70s)\n", ttrace->entry_str);
1501 }
1502 } else {
1503 ttrace->entry_pending = true;
1504 /* See trace__vfs_getname & trace__sys_exit */
1505 ttrace->filename.pending_open = false;
1506 }
1507
1508 if (trace->current != thread) {
1509 thread__put(trace->current);
1510 trace->current = thread__get(thread);
1511 }
1512 err = 0;
1513 out_put:
1514 thread__put(thread);
1515 return err;
1516 }
1517
1518 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
1519 struct perf_sample *sample,
1520 struct callchain_cursor *cursor)
1521 {
1522 struct addr_location al;
1523
1524 if (machine__resolve(trace->host, &al, sample) < 0 ||
1525 thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, trace->max_stack))
1526 return -1;
1527
1528 return 0;
1529 }
1530
1531 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
1532 {
1533 /* TODO: user-configurable print_opts */
1534 const unsigned int print_opts = EVSEL__PRINT_SYM |
1535 EVSEL__PRINT_DSO |
1536 EVSEL__PRINT_UNKNOWN_AS_ADDR;
1537
1538 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
1539 }
1540
1541 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
1542 union perf_event *event __maybe_unused,
1543 struct perf_sample *sample)
1544 {
1545 long ret;
1546 u64 duration = 0;
1547 struct thread *thread;
1548 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0;
1549 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1550 struct thread_trace *ttrace;
1551
1552 if (sc == NULL)
1553 return -1;
1554
1555 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1556 ttrace = thread__trace(thread, trace->output);
1557 if (ttrace == NULL)
1558 goto out_put;
1559
1560 if (trace->summary)
1561 thread__update_stats(ttrace, id, sample);
1562
1563 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
1564
1565 if (id == trace->open_id && ret >= 0 && ttrace->filename.pending_open) {
1566 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
1567 ttrace->filename.pending_open = false;
1568 ++trace->stats.vfs_getname;
1569 }
1570
1571 if (ttrace->entry_time) {
1572 duration = sample->time - ttrace->entry_time;
1573 if (trace__filter_duration(trace, duration))
1574 goto out;
1575 } else if (trace->duration_filter)
1576 goto out;
1577
1578 if (sample->callchain) {
1579 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1580 if (callchain_ret == 0) {
1581 if (callchain_cursor.nr < trace->min_stack)
1582 goto out;
1583 callchain_ret = 1;
1584 }
1585 }
1586
1587 if (trace->summary_only)
1588 goto out;
1589
1590 trace__fprintf_entry_head(trace, thread, duration, ttrace->entry_time, trace->output);
1591
1592 if (ttrace->entry_pending) {
1593 fprintf(trace->output, "%-70s", ttrace->entry_str);
1594 } else {
1595 fprintf(trace->output, " ... [");
1596 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
1597 fprintf(trace->output, "]: %s()", sc->name);
1598 }
1599
1600 if (sc->fmt == NULL) {
1601 signed_print:
1602 fprintf(trace->output, ") = %ld", ret);
1603 } else if (ret < 0 && (sc->fmt->errmsg || sc->fmt->errpid)) {
1604 char bf[STRERR_BUFSIZE];
1605 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
1606 *e = audit_errno_to_name(-ret);
1607
1608 fprintf(trace->output, ") = -1 %s %s", e, emsg);
1609 } else if (ret == 0 && sc->fmt->timeout)
1610 fprintf(trace->output, ") = 0 Timeout");
1611 else if (sc->fmt->hexret)
1612 fprintf(trace->output, ") = %#lx", ret);
1613 else if (sc->fmt->errpid) {
1614 struct thread *child = machine__find_thread(trace->host, ret, ret);
1615
1616 if (child != NULL) {
1617 fprintf(trace->output, ") = %ld", ret);
1618 if (child->comm_set)
1619 fprintf(trace->output, " (%s)", thread__comm_str(child));
1620 thread__put(child);
1621 }
1622 } else
1623 goto signed_print;
1624
1625 fputc('\n', trace->output);
1626
1627 if (callchain_ret > 0)
1628 trace__fprintf_callchain(trace, sample);
1629 else if (callchain_ret < 0)
1630 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1631 out:
1632 ttrace->entry_pending = false;
1633 err = 0;
1634 out_put:
1635 thread__put(thread);
1636 return err;
1637 }
1638
1639 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
1640 union perf_event *event __maybe_unused,
1641 struct perf_sample *sample)
1642 {
1643 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1644 struct thread_trace *ttrace;
1645 size_t filename_len, entry_str_len, to_move;
1646 ssize_t remaining_space;
1647 char *pos;
1648 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
1649
1650 if (!thread)
1651 goto out;
1652
1653 ttrace = thread__priv(thread);
1654 if (!ttrace)
1655 goto out;
1656
1657 filename_len = strlen(filename);
1658
1659 if (ttrace->filename.namelen < filename_len) {
1660 char *f = realloc(ttrace->filename.name, filename_len + 1);
1661
1662 if (f == NULL)
1663 goto out;
1664
1665 ttrace->filename.namelen = filename_len;
1666 ttrace->filename.name = f;
1667 }
1668
1669 strcpy(ttrace->filename.name, filename);
1670 ttrace->filename.pending_open = true;
1671
1672 if (!ttrace->filename.ptr)
1673 goto out;
1674
1675 entry_str_len = strlen(ttrace->entry_str);
1676 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
1677 if (remaining_space <= 0)
1678 goto out;
1679
1680 if (filename_len > (size_t)remaining_space) {
1681 filename += filename_len - remaining_space;
1682 filename_len = remaining_space;
1683 }
1684
1685 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
1686 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
1687 memmove(pos + filename_len, pos, to_move);
1688 memcpy(pos, filename, filename_len);
1689
1690 ttrace->filename.ptr = 0;
1691 ttrace->filename.entry_str_pos = 0;
1692 out:
1693 return 0;
1694 }
1695
1696 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
1697 union perf_event *event __maybe_unused,
1698 struct perf_sample *sample)
1699 {
1700 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
1701 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
1702 struct thread *thread = machine__findnew_thread(trace->host,
1703 sample->pid,
1704 sample->tid);
1705 struct thread_trace *ttrace = thread__trace(thread, trace->output);
1706
1707 if (ttrace == NULL)
1708 goto out_dump;
1709
1710 ttrace->runtime_ms += runtime_ms;
1711 trace->runtime_ms += runtime_ms;
1712 thread__put(thread);
1713 return 0;
1714
1715 out_dump:
1716 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
1717 evsel->name,
1718 perf_evsel__strval(evsel, sample, "comm"),
1719 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
1720 runtime,
1721 perf_evsel__intval(evsel, sample, "vruntime"));
1722 thread__put(thread);
1723 return 0;
1724 }
1725
1726 static void bpf_output__printer(enum binary_printer_ops op,
1727 unsigned int val, void *extra)
1728 {
1729 FILE *output = extra;
1730 unsigned char ch = (unsigned char)val;
1731
1732 switch (op) {
1733 case BINARY_PRINT_CHAR_DATA:
1734 fprintf(output, "%c", isprint(ch) ? ch : '.');
1735 break;
1736 case BINARY_PRINT_DATA_BEGIN:
1737 case BINARY_PRINT_LINE_BEGIN:
1738 case BINARY_PRINT_ADDR:
1739 case BINARY_PRINT_NUM_DATA:
1740 case BINARY_PRINT_NUM_PAD:
1741 case BINARY_PRINT_SEP:
1742 case BINARY_PRINT_CHAR_PAD:
1743 case BINARY_PRINT_LINE_END:
1744 case BINARY_PRINT_DATA_END:
1745 default:
1746 break;
1747 }
1748 }
1749
1750 static void bpf_output__fprintf(struct trace *trace,
1751 struct perf_sample *sample)
1752 {
1753 print_binary(sample->raw_data, sample->raw_size, 8,
1754 bpf_output__printer, trace->output);
1755 }
1756
1757 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
1758 union perf_event *event __maybe_unused,
1759 struct perf_sample *sample)
1760 {
1761 int callchain_ret = 0;
1762
1763 if (sample->callchain) {
1764 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1765 if (callchain_ret == 0) {
1766 if (callchain_cursor.nr < trace->min_stack)
1767 goto out;
1768 callchain_ret = 1;
1769 }
1770 }
1771
1772 trace__printf_interrupted_entry(trace, sample);
1773 trace__fprintf_tstamp(trace, sample->time, trace->output);
1774
1775 if (trace->trace_syscalls)
1776 fprintf(trace->output, "( ): ");
1777
1778 fprintf(trace->output, "%s:", evsel->name);
1779
1780 if (perf_evsel__is_bpf_output(evsel)) {
1781 bpf_output__fprintf(trace, sample);
1782 } else if (evsel->tp_format) {
1783 event_format__fprintf(evsel->tp_format, sample->cpu,
1784 sample->raw_data, sample->raw_size,
1785 trace->output);
1786 }
1787
1788 fprintf(trace->output, ")\n");
1789
1790 if (callchain_ret > 0)
1791 trace__fprintf_callchain(trace, sample);
1792 else if (callchain_ret < 0)
1793 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1794 out:
1795 return 0;
1796 }
1797
1798 static void print_location(FILE *f, struct perf_sample *sample,
1799 struct addr_location *al,
1800 bool print_dso, bool print_sym)
1801 {
1802
1803 if ((verbose || print_dso) && al->map)
1804 fprintf(f, "%s@", al->map->dso->long_name);
1805
1806 if ((verbose || print_sym) && al->sym)
1807 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
1808 al->addr - al->sym->start);
1809 else if (al->map)
1810 fprintf(f, "0x%" PRIx64, al->addr);
1811 else
1812 fprintf(f, "0x%" PRIx64, sample->addr);
1813 }
1814
1815 static int trace__pgfault(struct trace *trace,
1816 struct perf_evsel *evsel,
1817 union perf_event *event __maybe_unused,
1818 struct perf_sample *sample)
1819 {
1820 struct thread *thread;
1821 struct addr_location al;
1822 char map_type = 'd';
1823 struct thread_trace *ttrace;
1824 int err = -1;
1825 int callchain_ret = 0;
1826
1827 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1828
1829 if (sample->callchain) {
1830 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1831 if (callchain_ret == 0) {
1832 if (callchain_cursor.nr < trace->min_stack)
1833 goto out_put;
1834 callchain_ret = 1;
1835 }
1836 }
1837
1838 ttrace = thread__trace(thread, trace->output);
1839 if (ttrace == NULL)
1840 goto out_put;
1841
1842 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
1843 ttrace->pfmaj++;
1844 else
1845 ttrace->pfmin++;
1846
1847 if (trace->summary_only)
1848 goto out;
1849
1850 thread__find_addr_location(thread, sample->cpumode, MAP__FUNCTION,
1851 sample->ip, &al);
1852
1853 trace__fprintf_entry_head(trace, thread, 0, sample->time, trace->output);
1854
1855 fprintf(trace->output, "%sfault [",
1856 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
1857 "maj" : "min");
1858
1859 print_location(trace->output, sample, &al, false, true);
1860
1861 fprintf(trace->output, "] => ");
1862
1863 thread__find_addr_location(thread, sample->cpumode, MAP__VARIABLE,
1864 sample->addr, &al);
1865
1866 if (!al.map) {
1867 thread__find_addr_location(thread, sample->cpumode,
1868 MAP__FUNCTION, sample->addr, &al);
1869
1870 if (al.map)
1871 map_type = 'x';
1872 else
1873 map_type = '?';
1874 }
1875
1876 print_location(trace->output, sample, &al, true, false);
1877
1878 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
1879
1880 if (callchain_ret > 0)
1881 trace__fprintf_callchain(trace, sample);
1882 else if (callchain_ret < 0)
1883 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1884 out:
1885 err = 0;
1886 out_put:
1887 thread__put(thread);
1888 return err;
1889 }
1890
1891 static void trace__set_base_time(struct trace *trace,
1892 struct perf_evsel *evsel,
1893 struct perf_sample *sample)
1894 {
1895 /*
1896 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
1897 * and don't use sample->time unconditionally, we may end up having
1898 * some other event in the future without PERF_SAMPLE_TIME for good
1899 * reason, i.e. we may not be interested in its timestamps, just in
1900 * it taking place, picking some piece of information when it
1901 * appears in our event stream (vfs_getname comes to mind).
1902 */
1903 if (trace->base_time == 0 && !trace->full_time &&
1904 (evsel->attr.sample_type & PERF_SAMPLE_TIME))
1905 trace->base_time = sample->time;
1906 }
1907
1908 static int trace__process_sample(struct perf_tool *tool,
1909 union perf_event *event,
1910 struct perf_sample *sample,
1911 struct perf_evsel *evsel,
1912 struct machine *machine __maybe_unused)
1913 {
1914 struct trace *trace = container_of(tool, struct trace, tool);
1915 struct thread *thread;
1916 int err = 0;
1917
1918 tracepoint_handler handler = evsel->handler;
1919
1920 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1921 if (thread && thread__is_filtered(thread))
1922 return 0;
1923
1924 trace__set_base_time(trace, evsel, sample);
1925
1926 if (handler) {
1927 ++trace->nr_events;
1928 handler(trace, evsel, event, sample);
1929 }
1930
1931 return err;
1932 }
1933
1934 static int trace__record(struct trace *trace, int argc, const char **argv)
1935 {
1936 unsigned int rec_argc, i, j;
1937 const char **rec_argv;
1938 const char * const record_args[] = {
1939 "record",
1940 "-R",
1941 "-m", "1024",
1942 "-c", "1",
1943 };
1944
1945 const char * const sc_args[] = { "-e", };
1946 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
1947 const char * const majpf_args[] = { "-e", "major-faults" };
1948 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
1949 const char * const minpf_args[] = { "-e", "minor-faults" };
1950 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
1951
1952 /* +1 is for the event string below */
1953 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
1954 majpf_args_nr + minpf_args_nr + argc;
1955 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1956
1957 if (rec_argv == NULL)
1958 return -ENOMEM;
1959
1960 j = 0;
1961 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1962 rec_argv[j++] = record_args[i];
1963
1964 if (trace->trace_syscalls) {
1965 for (i = 0; i < sc_args_nr; i++)
1966 rec_argv[j++] = sc_args[i];
1967
1968 /* event string may be different for older kernels - e.g., RHEL6 */
1969 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
1970 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
1971 else if (is_valid_tracepoint("syscalls:sys_enter"))
1972 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
1973 else {
1974 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
1975 return -1;
1976 }
1977 }
1978
1979 if (trace->trace_pgfaults & TRACE_PFMAJ)
1980 for (i = 0; i < majpf_args_nr; i++)
1981 rec_argv[j++] = majpf_args[i];
1982
1983 if (trace->trace_pgfaults & TRACE_PFMIN)
1984 for (i = 0; i < minpf_args_nr; i++)
1985 rec_argv[j++] = minpf_args[i];
1986
1987 for (i = 0; i < (unsigned int)argc; i++)
1988 rec_argv[j++] = argv[i];
1989
1990 return cmd_record(j, rec_argv, NULL);
1991 }
1992
1993 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
1994
1995 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
1996 {
1997 struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");
1998
1999 if (IS_ERR(evsel))
2000 return false;
2001
2002 if (perf_evsel__field(evsel, "pathname") == NULL) {
2003 perf_evsel__delete(evsel);
2004 return false;
2005 }
2006
2007 evsel->handler = trace__vfs_getname;
2008 perf_evlist__add(evlist, evsel);
2009 return true;
2010 }
2011
2012 static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
2013 {
2014 struct perf_evsel *evsel;
2015 struct perf_event_attr attr = {
2016 .type = PERF_TYPE_SOFTWARE,
2017 .mmap_data = 1,
2018 };
2019
2020 attr.config = config;
2021 attr.sample_period = 1;
2022
2023 event_attr_init(&attr);
2024
2025 evsel = perf_evsel__new(&attr);
2026 if (evsel)
2027 evsel->handler = trace__pgfault;
2028
2029 return evsel;
2030 }
2031
2032 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2033 {
2034 const u32 type = event->header.type;
2035 struct perf_evsel *evsel;
2036
2037 if (type != PERF_RECORD_SAMPLE) {
2038 trace__process_event(trace, trace->host, event, sample);
2039 return;
2040 }
2041
2042 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2043 if (evsel == NULL) {
2044 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2045 return;
2046 }
2047
2048 trace__set_base_time(trace, evsel, sample);
2049
2050 if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
2051 sample->raw_data == NULL) {
2052 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2053 perf_evsel__name(evsel), sample->tid,
2054 sample->cpu, sample->raw_size);
2055 } else {
2056 tracepoint_handler handler = evsel->handler;
2057 handler(trace, evsel, event, sample);
2058 }
2059 }
2060
2061 static int trace__add_syscall_newtp(struct trace *trace)
2062 {
2063 int ret = -1;
2064 struct perf_evlist *evlist = trace->evlist;
2065 struct perf_evsel *sys_enter, *sys_exit;
2066
2067 sys_enter = perf_evsel__syscall_newtp("sys_enter", trace__sys_enter);
2068 if (sys_enter == NULL)
2069 goto out;
2070
2071 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2072 goto out_delete_sys_enter;
2073
2074 sys_exit = perf_evsel__syscall_newtp("sys_exit", trace__sys_exit);
2075 if (sys_exit == NULL)
2076 goto out_delete_sys_enter;
2077
2078 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2079 goto out_delete_sys_exit;
2080
2081 perf_evlist__add(evlist, sys_enter);
2082 perf_evlist__add(evlist, sys_exit);
2083
2084 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2085 /*
2086 * We're interested only in the user space callchain
2087 * leading to the syscall, allow overriding that for
2088 * debugging reasons using --kernel_syscall_callchains
2089 */
2090 sys_exit->attr.exclude_callchain_kernel = 1;
2091 }
2092
2093 trace->syscalls.events.sys_enter = sys_enter;
2094 trace->syscalls.events.sys_exit = sys_exit;
2095
2096 ret = 0;
2097 out:
2098 return ret;
2099
2100 out_delete_sys_exit:
2101 perf_evsel__delete_priv(sys_exit);
2102 out_delete_sys_enter:
2103 perf_evsel__delete_priv(sys_enter);
2104 goto out;
2105 }
2106
2107 static int trace__set_ev_qualifier_filter(struct trace *trace)
2108 {
2109 int err = -1;
2110 struct perf_evsel *sys_exit;
2111 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2112 trace->ev_qualifier_ids.nr,
2113 trace->ev_qualifier_ids.entries);
2114
2115 if (filter == NULL)
2116 goto out_enomem;
2117
2118 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2119 filter)) {
2120 sys_exit = trace->syscalls.events.sys_exit;
2121 err = perf_evsel__append_tp_filter(sys_exit, filter);
2122 }
2123
2124 free(filter);
2125 out:
2126 return err;
2127 out_enomem:
2128 errno = ENOMEM;
2129 goto out;
2130 }
2131
2132 static int trace__run(struct trace *trace, int argc, const char **argv)
2133 {
2134 struct perf_evlist *evlist = trace->evlist;
2135 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
2136 int err = -1, i;
2137 unsigned long before;
2138 const bool forks = argc > 0;
2139 bool draining = false;
2140
2141 trace->live = true;
2142
2143 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
2144 goto out_error_raw_syscalls;
2145
2146 if (trace->trace_syscalls)
2147 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
2148
2149 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
2150 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
2151 if (pgfault_maj == NULL)
2152 goto out_error_mem;
2153 perf_evlist__add(evlist, pgfault_maj);
2154 }
2155
2156 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
2157 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
2158 if (pgfault_min == NULL)
2159 goto out_error_mem;
2160 perf_evlist__add(evlist, pgfault_min);
2161 }
2162
2163 if (trace->sched &&
2164 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
2165 trace__sched_stat_runtime))
2166 goto out_error_sched_stat_runtime;
2167
2168 err = perf_evlist__create_maps(evlist, &trace->opts.target);
2169 if (err < 0) {
2170 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
2171 goto out_delete_evlist;
2172 }
2173
2174 err = trace__symbols_init(trace, evlist);
2175 if (err < 0) {
2176 fprintf(trace->output, "Problems initializing symbol libraries!\n");
2177 goto out_delete_evlist;
2178 }
2179
2180 perf_evlist__config(evlist, &trace->opts, NULL);
2181
2182 if (callchain_param.enabled) {
2183 bool use_identifier = false;
2184
2185 if (trace->syscalls.events.sys_exit) {
2186 perf_evsel__config_callchain(trace->syscalls.events.sys_exit,
2187 &trace->opts, &callchain_param);
2188 use_identifier = true;
2189 }
2190
2191 if (pgfault_maj) {
2192 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
2193 use_identifier = true;
2194 }
2195
2196 if (pgfault_min) {
2197 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
2198 use_identifier = true;
2199 }
2200
2201 if (use_identifier) {
2202 /*
2203 * Now we have evsels with different sample_ids, use
2204 * PERF_SAMPLE_IDENTIFIER to map from sample to evsel
2205 * from a fixed position in each ring buffer record.
2206 *
2207 * As of this the changeset introducing this comment, this
2208 * isn't strictly needed, as the fields that can come before
2209 * PERF_SAMPLE_ID are all used, but we'll probably disable
2210 * some of those for things like copying the payload of
2211 * pointer syscall arguments, and for vfs_getname we don't
2212 * need PERF_SAMPLE_ADDR and PERF_SAMPLE_IP, so do this
2213 * here as a warning we need to use PERF_SAMPLE_IDENTIFIER.
2214 */
2215 perf_evlist__set_sample_bit(evlist, IDENTIFIER);
2216 perf_evlist__reset_sample_bit(evlist, ID);
2217 }
2218 }
2219
2220 signal(SIGCHLD, sig_handler);
2221 signal(SIGINT, sig_handler);
2222
2223 if (forks) {
2224 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
2225 argv, false, NULL);
2226 if (err < 0) {
2227 fprintf(trace->output, "Couldn't run the workload!\n");
2228 goto out_delete_evlist;
2229 }
2230 }
2231
2232 err = perf_evlist__open(evlist);
2233 if (err < 0)
2234 goto out_error_open;
2235
2236 err = bpf__apply_obj_config();
2237 if (err) {
2238 char errbuf[BUFSIZ];
2239
2240 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
2241 pr_err("ERROR: Apply config to BPF failed: %s\n",
2242 errbuf);
2243 goto out_error_open;
2244 }
2245
2246 /*
2247 * Better not use !target__has_task() here because we need to cover the
2248 * case where no threads were specified in the command line, but a
2249 * workload was, and in that case we will fill in the thread_map when
2250 * we fork the workload in perf_evlist__prepare_workload.
2251 */
2252 if (trace->filter_pids.nr > 0)
2253 err = perf_evlist__set_filter_pids(evlist, trace->filter_pids.nr, trace->filter_pids.entries);
2254 else if (thread_map__pid(evlist->threads, 0) == -1)
2255 err = perf_evlist__set_filter_pid(evlist, getpid());
2256
2257 if (err < 0)
2258 goto out_error_mem;
2259
2260 if (trace->ev_qualifier_ids.nr > 0) {
2261 err = trace__set_ev_qualifier_filter(trace);
2262 if (err < 0)
2263 goto out_errno;
2264
2265 pr_debug("event qualifier tracepoint filter: %s\n",
2266 trace->syscalls.events.sys_exit->filter);
2267 }
2268
2269 err = perf_evlist__apply_filters(evlist, &evsel);
2270 if (err < 0)
2271 goto out_error_apply_filters;
2272
2273 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages, false);
2274 if (err < 0)
2275 goto out_error_mmap;
2276
2277 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
2278 perf_evlist__enable(evlist);
2279
2280 if (forks)
2281 perf_evlist__start_workload(evlist);
2282
2283 if (trace->opts.initial_delay) {
2284 usleep(trace->opts.initial_delay * 1000);
2285 perf_evlist__enable(evlist);
2286 }
2287
2288 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
2289 evlist->threads->nr > 1 ||
2290 perf_evlist__first(evlist)->attr.inherit;
2291 again:
2292 before = trace->nr_events;
2293
2294 for (i = 0; i < evlist->nr_mmaps; i++) {
2295 union perf_event *event;
2296
2297 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
2298 struct perf_sample sample;
2299
2300 ++trace->nr_events;
2301
2302 err = perf_evlist__parse_sample(evlist, event, &sample);
2303 if (err) {
2304 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
2305 goto next_event;
2306 }
2307
2308 trace__handle_event(trace, event, &sample);
2309 next_event:
2310 perf_evlist__mmap_consume(evlist, i);
2311
2312 if (interrupted)
2313 goto out_disable;
2314
2315 if (done && !draining) {
2316 perf_evlist__disable(evlist);
2317 draining = true;
2318 }
2319 }
2320 }
2321
2322 if (trace->nr_events == before) {
2323 int timeout = done ? 100 : -1;
2324
2325 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
2326 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP) == 0)
2327 draining = true;
2328
2329 goto again;
2330 }
2331 } else {
2332 goto again;
2333 }
2334
2335 out_disable:
2336 thread__zput(trace->current);
2337
2338 perf_evlist__disable(evlist);
2339
2340 if (!err) {
2341 if (trace->summary)
2342 trace__fprintf_thread_summary(trace, trace->output);
2343
2344 if (trace->show_tool_stats) {
2345 fprintf(trace->output, "Stats:\n "
2346 " vfs_getname : %" PRIu64 "\n"
2347 " proc_getname: %" PRIu64 "\n",
2348 trace->stats.vfs_getname,
2349 trace->stats.proc_getname);
2350 }
2351 }
2352
2353 out_delete_evlist:
2354 perf_evlist__delete(evlist);
2355 trace->evlist = NULL;
2356 trace->live = false;
2357 return err;
2358 {
2359 char errbuf[BUFSIZ];
2360
2361 out_error_sched_stat_runtime:
2362 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
2363 goto out_error;
2364
2365 out_error_raw_syscalls:
2366 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
2367 goto out_error;
2368
2369 out_error_mmap:
2370 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
2371 goto out_error;
2372
2373 out_error_open:
2374 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
2375
2376 out_error:
2377 fprintf(trace->output, "%s\n", errbuf);
2378 goto out_delete_evlist;
2379
2380 out_error_apply_filters:
2381 fprintf(trace->output,
2382 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
2383 evsel->filter, perf_evsel__name(evsel), errno,
2384 str_error_r(errno, errbuf, sizeof(errbuf)));
2385 goto out_delete_evlist;
2386 }
2387 out_error_mem:
2388 fprintf(trace->output, "Not enough memory to run!\n");
2389 goto out_delete_evlist;
2390
2391 out_errno:
2392 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
2393 goto out_delete_evlist;
2394 }
2395
2396 static int trace__replay(struct trace *trace)
2397 {
2398 const struct perf_evsel_str_handler handlers[] = {
2399 { "probe:vfs_getname", trace__vfs_getname, },
2400 };
2401 struct perf_data_file file = {
2402 .path = input_name,
2403 .mode = PERF_DATA_MODE_READ,
2404 .force = trace->force,
2405 };
2406 struct perf_session *session;
2407 struct perf_evsel *evsel;
2408 int err = -1;
2409
2410 trace->tool.sample = trace__process_sample;
2411 trace->tool.mmap = perf_event__process_mmap;
2412 trace->tool.mmap2 = perf_event__process_mmap2;
2413 trace->tool.comm = perf_event__process_comm;
2414 trace->tool.exit = perf_event__process_exit;
2415 trace->tool.fork = perf_event__process_fork;
2416 trace->tool.attr = perf_event__process_attr;
2417 trace->tool.tracing_data = perf_event__process_tracing_data;
2418 trace->tool.build_id = perf_event__process_build_id;
2419
2420 trace->tool.ordered_events = true;
2421 trace->tool.ordering_requires_timestamps = true;
2422
2423 /* add tid to output */
2424 trace->multiple_threads = true;
2425
2426 session = perf_session__new(&file, false, &trace->tool);
2427 if (session == NULL)
2428 return -1;
2429
2430 if (trace->opts.target.pid)
2431 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
2432
2433 if (trace->opts.target.tid)
2434 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
2435
2436 if (symbol__init(&session->header.env) < 0)
2437 goto out;
2438
2439 trace->host = &session->machines.host;
2440
2441 err = perf_session__set_tracepoints_handlers(session, handlers);
2442 if (err)
2443 goto out;
2444
2445 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2446 "raw_syscalls:sys_enter");
2447 /* older kernels have syscalls tp versus raw_syscalls */
2448 if (evsel == NULL)
2449 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2450 "syscalls:sys_enter");
2451
2452 if (evsel &&
2453 (perf_evsel__init_syscall_tp(evsel, trace__sys_enter) < 0 ||
2454 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
2455 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
2456 goto out;
2457 }
2458
2459 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2460 "raw_syscalls:sys_exit");
2461 if (evsel == NULL)
2462 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2463 "syscalls:sys_exit");
2464 if (evsel &&
2465 (perf_evsel__init_syscall_tp(evsel, trace__sys_exit) < 0 ||
2466 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
2467 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
2468 goto out;
2469 }
2470
2471 evlist__for_each_entry(session->evlist, evsel) {
2472 if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
2473 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
2474 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
2475 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
2476 evsel->handler = trace__pgfault;
2477 }
2478
2479 setup_pager();
2480
2481 err = perf_session__process_events(session);
2482 if (err)
2483 pr_err("Failed to process events, error %d", err);
2484
2485 else if (trace->summary)
2486 trace__fprintf_thread_summary(trace, trace->output);
2487
2488 out:
2489 perf_session__delete(session);
2490
2491 return err;
2492 }
2493
2494 static size_t trace__fprintf_threads_header(FILE *fp)
2495 {
2496 size_t printed;
2497
2498 printed = fprintf(fp, "\n Summary of events:\n\n");
2499
2500 return printed;
2501 }
2502
2503 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
2504 struct stats *stats;
2505 double msecs;
2506 int syscall;
2507 )
2508 {
2509 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
2510 struct stats *stats = source->priv;
2511
2512 entry->syscall = source->i;
2513 entry->stats = stats;
2514 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
2515 }
2516
2517 static size_t thread__dump_stats(struct thread_trace *ttrace,
2518 struct trace *trace, FILE *fp)
2519 {
2520 size_t printed = 0;
2521 struct syscall *sc;
2522 struct rb_node *nd;
2523 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
2524
2525 if (syscall_stats == NULL)
2526 return 0;
2527
2528 printed += fprintf(fp, "\n");
2529
2530 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
2531 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
2532 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
2533
2534 resort_rb__for_each_entry(nd, syscall_stats) {
2535 struct stats *stats = syscall_stats_entry->stats;
2536 if (stats) {
2537 double min = (double)(stats->min) / NSEC_PER_MSEC;
2538 double max = (double)(stats->max) / NSEC_PER_MSEC;
2539 double avg = avg_stats(stats);
2540 double pct;
2541 u64 n = (u64) stats->n;
2542
2543 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
2544 avg /= NSEC_PER_MSEC;
2545
2546 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
2547 printed += fprintf(fp, " %-15s", sc->name);
2548 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
2549 n, syscall_stats_entry->msecs, min, avg);
2550 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
2551 }
2552 }
2553
2554 resort_rb__delete(syscall_stats);
2555 printed += fprintf(fp, "\n\n");
2556
2557 return printed;
2558 }
2559
2560 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
2561 {
2562 size_t printed = 0;
2563 struct thread_trace *ttrace = thread__priv(thread);
2564 double ratio;
2565
2566 if (ttrace == NULL)
2567 return 0;
2568
2569 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
2570
2571 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
2572 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
2573 printed += fprintf(fp, "%.1f%%", ratio);
2574 if (ttrace->pfmaj)
2575 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
2576 if (ttrace->pfmin)
2577 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
2578 if (trace->sched)
2579 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
2580 else if (fputc('\n', fp) != EOF)
2581 ++printed;
2582
2583 printed += thread__dump_stats(ttrace, trace, fp);
2584
2585 return printed;
2586 }
2587
2588 static unsigned long thread__nr_events(struct thread_trace *ttrace)
2589 {
2590 return ttrace ? ttrace->nr_events : 0;
2591 }
2592
2593 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
2594 struct thread *thread;
2595 )
2596 {
2597 entry->thread = rb_entry(nd, struct thread, rb_node);
2598 }
2599
2600 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
2601 {
2602 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host);
2603 size_t printed = trace__fprintf_threads_header(fp);
2604 struct rb_node *nd;
2605
2606 if (threads == NULL) {
2607 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
2608 return 0;
2609 }
2610
2611 resort_rb__for_each_entry(nd, threads)
2612 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
2613
2614 resort_rb__delete(threads);
2615
2616 return printed;
2617 }
2618
2619 static int trace__set_duration(const struct option *opt, const char *str,
2620 int unset __maybe_unused)
2621 {
2622 struct trace *trace = opt->value;
2623
2624 trace->duration_filter = atof(str);
2625 return 0;
2626 }
2627
2628 static int trace__set_filter_pids(const struct option *opt, const char *str,
2629 int unset __maybe_unused)
2630 {
2631 int ret = -1;
2632 size_t i;
2633 struct trace *trace = opt->value;
2634 /*
2635 * FIXME: introduce a intarray class, plain parse csv and create a
2636 * { int nr, int entries[] } struct...
2637 */
2638 struct intlist *list = intlist__new(str);
2639
2640 if (list == NULL)
2641 return -1;
2642
2643 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
2644 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
2645
2646 if (trace->filter_pids.entries == NULL)
2647 goto out;
2648
2649 trace->filter_pids.entries[0] = getpid();
2650
2651 for (i = 1; i < trace->filter_pids.nr; ++i)
2652 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
2653
2654 intlist__delete(list);
2655 ret = 0;
2656 out:
2657 return ret;
2658 }
2659
2660 static int trace__open_output(struct trace *trace, const char *filename)
2661 {
2662 struct stat st;
2663
2664 if (!stat(filename, &st) && st.st_size) {
2665 char oldname[PATH_MAX];
2666
2667 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
2668 unlink(oldname);
2669 rename(filename, oldname);
2670 }
2671
2672 trace->output = fopen(filename, "w");
2673
2674 return trace->output == NULL ? -errno : 0;
2675 }
2676
2677 static int parse_pagefaults(const struct option *opt, const char *str,
2678 int unset __maybe_unused)
2679 {
2680 int *trace_pgfaults = opt->value;
2681
2682 if (strcmp(str, "all") == 0)
2683 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
2684 else if (strcmp(str, "maj") == 0)
2685 *trace_pgfaults |= TRACE_PFMAJ;
2686 else if (strcmp(str, "min") == 0)
2687 *trace_pgfaults |= TRACE_PFMIN;
2688 else
2689 return -1;
2690
2691 return 0;
2692 }
2693
2694 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
2695 {
2696 struct perf_evsel *evsel;
2697
2698 evlist__for_each_entry(evlist, evsel)
2699 evsel->handler = handler;
2700 }
2701
2702 int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
2703 {
2704 const char *trace_usage[] = {
2705 "perf trace [<options>] [<command>]",
2706 "perf trace [<options>] -- <command> [<options>]",
2707 "perf trace record [<options>] [<command>]",
2708 "perf trace record [<options>] -- <command> [<options>]",
2709 NULL
2710 };
2711 struct trace trace = {
2712 .syscalls = {
2713 . max = -1,
2714 },
2715 .opts = {
2716 .target = {
2717 .uid = UINT_MAX,
2718 .uses_mmap = true,
2719 },
2720 .user_freq = UINT_MAX,
2721 .user_interval = ULLONG_MAX,
2722 .no_buffering = true,
2723 .mmap_pages = UINT_MAX,
2724 .proc_map_timeout = 500,
2725 },
2726 .output = stderr,
2727 .show_comm = true,
2728 .trace_syscalls = true,
2729 .kernel_syscallchains = false,
2730 .max_stack = UINT_MAX,
2731 };
2732 const char *output_name = NULL;
2733 const char *ev_qualifier_str = NULL;
2734 const struct option trace_options[] = {
2735 OPT_CALLBACK(0, "event", &trace.evlist, "event",
2736 "event selector. use 'perf list' to list available events",
2737 parse_events_option),
2738 OPT_BOOLEAN(0, "comm", &trace.show_comm,
2739 "show the thread COMM next to its id"),
2740 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
2741 OPT_STRING('e', "expr", &ev_qualifier_str, "expr", "list of syscalls to trace"),
2742 OPT_STRING('o', "output", &output_name, "file", "output file name"),
2743 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
2744 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
2745 "trace events on existing process id"),
2746 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
2747 "trace events on existing thread id"),
2748 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
2749 "pids to filter (by the kernel)", trace__set_filter_pids),
2750 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
2751 "system-wide collection from all CPUs"),
2752 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
2753 "list of cpus to monitor"),
2754 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
2755 "child tasks do not inherit counters"),
2756 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
2757 "number of mmap data pages",
2758 perf_evlist__parse_mmap_pages),
2759 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
2760 "user to profile"),
2761 OPT_CALLBACK(0, "duration", &trace, "float",
2762 "show only events with duration > N.M ms",
2763 trace__set_duration),
2764 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
2765 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
2766 OPT_BOOLEAN('T', "time", &trace.full_time,
2767 "Show full timestamp, not time relative to first start"),
2768 OPT_BOOLEAN('s', "summary", &trace.summary_only,
2769 "Show only syscall summary with statistics"),
2770 OPT_BOOLEAN('S', "with-summary", &trace.summary,
2771 "Show all syscalls and summary with statistics"),
2772 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
2773 "Trace pagefaults", parse_pagefaults, "maj"),
2774 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
2775 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
2776 OPT_CALLBACK(0, "call-graph", &trace.opts,
2777 "record_mode[,record_size]", record_callchain_help,
2778 &record_parse_callchain_opt),
2779 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
2780 "Show the kernel callchains on the syscall exit path"),
2781 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
2782 "Set the minimum stack depth when parsing the callchain, "
2783 "anything below the specified depth will be ignored."),
2784 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
2785 "Set the maximum stack depth when parsing the callchain, "
2786 "anything beyond the specified depth will be ignored. "
2787 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
2788 OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
2789 "per thread proc mmap processing timeout in ms"),
2790 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
2791 "ms to wait before starting measurement after program "
2792 "start"),
2793 OPT_END()
2794 };
2795 bool __maybe_unused max_stack_user_set = true;
2796 bool mmap_pages_user_set = true;
2797 const char * const trace_subcommands[] = { "record", NULL };
2798 int err;
2799 char bf[BUFSIZ];
2800
2801 signal(SIGSEGV, sighandler_dump_stack);
2802 signal(SIGFPE, sighandler_dump_stack);
2803
2804 trace.evlist = perf_evlist__new();
2805 trace.sctbl = syscalltbl__new();
2806
2807 if (trace.evlist == NULL || trace.sctbl == NULL) {
2808 pr_err("Not enough memory to run!\n");
2809 err = -ENOMEM;
2810 goto out;
2811 }
2812
2813 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
2814 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
2815
2816 err = bpf__setup_stdout(trace.evlist);
2817 if (err) {
2818 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
2819 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
2820 goto out;
2821 }
2822
2823 err = -1;
2824
2825 if (trace.trace_pgfaults) {
2826 trace.opts.sample_address = true;
2827 trace.opts.sample_time = true;
2828 }
2829
2830 if (trace.opts.mmap_pages == UINT_MAX)
2831 mmap_pages_user_set = false;
2832
2833 if (trace.max_stack == UINT_MAX) {
2834 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl_perf_event_max_stack;
2835 max_stack_user_set = false;
2836 }
2837
2838 #ifdef HAVE_DWARF_UNWIND_SUPPORT
2839 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled && trace.trace_syscalls)
2840 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
2841 #endif
2842
2843 if (callchain_param.enabled) {
2844 if (!mmap_pages_user_set && geteuid() == 0)
2845 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
2846
2847 symbol_conf.use_callchain = true;
2848 }
2849
2850 if (trace.evlist->nr_entries > 0)
2851 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
2852
2853 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
2854 return trace__record(&trace, argc-1, &argv[1]);
2855
2856 /* summary_only implies summary option, but don't overwrite summary if set */
2857 if (trace.summary_only)
2858 trace.summary = trace.summary_only;
2859
2860 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
2861 trace.evlist->nr_entries == 0 /* Was --events used? */) {
2862 pr_err("Please specify something to trace.\n");
2863 return -1;
2864 }
2865
2866 if (!trace.trace_syscalls && ev_qualifier_str) {
2867 pr_err("The -e option can't be used with --no-syscalls.\n");
2868 goto out;
2869 }
2870
2871 if (output_name != NULL) {
2872 err = trace__open_output(&trace, output_name);
2873 if (err < 0) {
2874 perror("failed to create output file");
2875 goto out;
2876 }
2877 }
2878
2879 trace.open_id = syscalltbl__id(trace.sctbl, "open");
2880
2881 if (ev_qualifier_str != NULL) {
2882 const char *s = ev_qualifier_str;
2883 struct strlist_config slist_config = {
2884 .dirname = system_path(STRACE_GROUPS_DIR),
2885 };
2886
2887 trace.not_ev_qualifier = *s == '!';
2888 if (trace.not_ev_qualifier)
2889 ++s;
2890 trace.ev_qualifier = strlist__new(s, &slist_config);
2891 if (trace.ev_qualifier == NULL) {
2892 fputs("Not enough memory to parse event qualifier",
2893 trace.output);
2894 err = -ENOMEM;
2895 goto out_close;
2896 }
2897
2898 err = trace__validate_ev_qualifier(&trace);
2899 if (err)
2900 goto out_close;
2901 }
2902
2903 err = target__validate(&trace.opts.target);
2904 if (err) {
2905 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
2906 fprintf(trace.output, "%s", bf);
2907 goto out_close;
2908 }
2909
2910 err = target__parse_uid(&trace.opts.target);
2911 if (err) {
2912 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
2913 fprintf(trace.output, "%s", bf);
2914 goto out_close;
2915 }
2916
2917 if (!argc && target__none(&trace.opts.target))
2918 trace.opts.target.system_wide = true;
2919
2920 if (input_name)
2921 err = trace__replay(&trace);
2922 else
2923 err = trace__run(&trace, argc, argv);
2924
2925 out_close:
2926 if (output_name != NULL)
2927 fclose(trace.output);
2928 out:
2929 return err;
2930 }
Ubuntu Artful kernel mirror