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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into...
[mirror_ubuntu-hirsute-kernel.git] / tools / perf / builtin-trace.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * builtin-trace.c
4 *
5 * Builtin 'trace' command:
6 *
7 * Display a continuously updated trace of any workload, CPU, specific PID,
8 * system wide, etc. Default format is loosely strace like, but any other
9 * event may be specified using --event.
10 *
11 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
12 *
13 * Initially based on the 'trace' prototype by Thomas Gleixner:
14 *
15 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
16 */
17
18 #include <traceevent/event-parse.h>
19 #include <api/fs/tracing_path.h>
20 #include <bpf/bpf.h>
21 #include "util/bpf_map.h"
22 #include "util/rlimit.h"
23 #include "builtin.h"
24 #include "util/cgroup.h"
25 #include "util/color.h"
26 #include "util/config.h"
27 #include "util/debug.h"
28 #include "util/env.h"
29 #include "util/event.h"
30 #include "util/evlist.h"
31 #include <subcmd/exec-cmd.h>
32 #include "util/machine.h"
33 #include "util/map.h"
34 #include "util/symbol.h"
35 #include "util/path.h"
36 #include "util/session.h"
37 #include "util/thread.h"
38 #include <subcmd/parse-options.h>
39 #include "util/strlist.h"
40 #include "util/intlist.h"
41 #include "util/thread_map.h"
42 #include "util/stat.h"
43 #include "trace/beauty/beauty.h"
44 #include "trace-event.h"
45 #include "util/parse-events.h"
46 #include "util/bpf-loader.h"
47 #include "callchain.h"
48 #include "print_binary.h"
49 #include "string2.h"
50 #include "syscalltbl.h"
51 #include "rb_resort.h"
52
53 #include <errno.h>
54 #include <inttypes.h>
55 #include <poll.h>
56 #include <signal.h>
57 #include <stdlib.h>
58 #include <string.h>
59 #include <linux/err.h>
60 #include <linux/filter.h>
61 #include <linux/kernel.h>
62 #include <linux/random.h>
63 #include <linux/stringify.h>
64 #include <linux/time64.h>
65 #include <linux/zalloc.h>
66 #include <fcntl.h>
67 #include <sys/sysmacros.h>
68
69 #include <linux/ctype.h>
70
71 #ifndef O_CLOEXEC
72 # define O_CLOEXEC 02000000
73 #endif
74
75 #ifndef F_LINUX_SPECIFIC_BASE
76 # define F_LINUX_SPECIFIC_BASE 1024
77 #endif
78
79 struct trace {
80 struct perf_tool tool;
81 struct syscalltbl *sctbl;
82 struct {
83 int max;
84 struct syscall *table;
85 struct bpf_map *map;
86 struct {
87 struct perf_evsel *sys_enter,
88 *sys_exit,
89 *augmented;
90 } events;
91 } syscalls;
92 struct {
93 struct bpf_map *map;
94 } dump;
95 struct record_opts opts;
96 struct perf_evlist *evlist;
97 struct machine *host;
98 struct thread *current;
99 struct cgroup *cgroup;
100 u64 base_time;
101 FILE *output;
102 unsigned long nr_events;
103 unsigned long nr_events_printed;
104 unsigned long max_events;
105 struct strlist *ev_qualifier;
106 struct {
107 size_t nr;
108 int *entries;
109 } ev_qualifier_ids;
110 struct {
111 size_t nr;
112 pid_t *entries;
113 struct bpf_map *map;
114 } filter_pids;
115 double duration_filter;
116 double runtime_ms;
117 struct {
118 u64 vfs_getname,
119 proc_getname;
120 } stats;
121 unsigned int max_stack;
122 unsigned int min_stack;
123 int raw_augmented_syscalls_args_size;
124 bool raw_augmented_syscalls;
125 bool sort_events;
126 bool not_ev_qualifier;
127 bool live;
128 bool full_time;
129 bool sched;
130 bool multiple_threads;
131 bool summary;
132 bool summary_only;
133 bool failure_only;
134 bool show_comm;
135 bool print_sample;
136 bool show_tool_stats;
137 bool trace_syscalls;
138 bool kernel_syscallchains;
139 s16 args_alignment;
140 bool show_tstamp;
141 bool show_duration;
142 bool show_zeros;
143 bool show_arg_names;
144 bool show_string_prefix;
145 bool force;
146 bool vfs_getname;
147 int trace_pgfaults;
148 struct {
149 struct ordered_events data;
150 u64 last;
151 } oe;
152 };
153
154 struct tp_field {
155 int offset;
156 union {
157 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
158 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
159 };
160 };
161
162 #define TP_UINT_FIELD(bits) \
163 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
164 { \
165 u##bits value; \
166 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
167 return value; \
168 }
169
170 TP_UINT_FIELD(8);
171 TP_UINT_FIELD(16);
172 TP_UINT_FIELD(32);
173 TP_UINT_FIELD(64);
174
175 #define TP_UINT_FIELD__SWAPPED(bits) \
176 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
177 { \
178 u##bits value; \
179 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
180 return bswap_##bits(value);\
181 }
182
183 TP_UINT_FIELD__SWAPPED(16);
184 TP_UINT_FIELD__SWAPPED(32);
185 TP_UINT_FIELD__SWAPPED(64);
186
187 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
188 {
189 field->offset = offset;
190
191 switch (size) {
192 case 1:
193 field->integer = tp_field__u8;
194 break;
195 case 2:
196 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
197 break;
198 case 4:
199 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
200 break;
201 case 8:
202 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
203 break;
204 default:
205 return -1;
206 }
207
208 return 0;
209 }
210
211 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
212 {
213 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
214 }
215
216 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
217 {
218 return sample->raw_data + field->offset;
219 }
220
221 static int __tp_field__init_ptr(struct tp_field *field, int offset)
222 {
223 field->offset = offset;
224 field->pointer = tp_field__ptr;
225 return 0;
226 }
227
228 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
229 {
230 return __tp_field__init_ptr(field, format_field->offset);
231 }
232
233 struct syscall_tp {
234 struct tp_field id;
235 union {
236 struct tp_field args, ret;
237 };
238 };
239
240 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
241 struct tp_field *field,
242 const char *name)
243 {
244 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
245
246 if (format_field == NULL)
247 return -1;
248
249 return tp_field__init_uint(field, format_field, evsel->needs_swap);
250 }
251
252 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
253 ({ struct syscall_tp *sc = evsel->priv;\
254 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
255
256 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
257 struct tp_field *field,
258 const char *name)
259 {
260 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
261
262 if (format_field == NULL)
263 return -1;
264
265 return tp_field__init_ptr(field, format_field);
266 }
267
268 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
269 ({ struct syscall_tp *sc = evsel->priv;\
270 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
271
272 static void perf_evsel__delete_priv(struct perf_evsel *evsel)
273 {
274 zfree(&evsel->priv);
275 perf_evsel__delete(evsel);
276 }
277
278 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel)
279 {
280 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
281
282 if (evsel->priv != NULL) {
283 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
284 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
285 goto out_delete;
286 return 0;
287 }
288
289 return -ENOMEM;
290 out_delete:
291 zfree(&evsel->priv);
292 return -ENOENT;
293 }
294
295 static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp)
296 {
297 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
298
299 if (evsel->priv != NULL) {
300 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
301 if (syscall_id == NULL)
302 syscall_id = perf_evsel__field(tp, "__syscall_nr");
303 if (syscall_id == NULL)
304 goto out_delete;
305 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
306 goto out_delete;
307
308 return 0;
309 }
310
311 return -ENOMEM;
312 out_delete:
313 zfree(&evsel->priv);
314 return -EINVAL;
315 }
316
317 static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel)
318 {
319 struct syscall_tp *sc = evsel->priv;
320
321 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
322 }
323
324 static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel)
325 {
326 struct syscall_tp *sc = evsel->priv;
327
328 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
329 }
330
331 static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler)
332 {
333 evsel->priv = malloc(sizeof(struct syscall_tp));
334 if (evsel->priv != NULL) {
335 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
336 goto out_delete;
337
338 evsel->handler = handler;
339 return 0;
340 }
341
342 return -ENOMEM;
343
344 out_delete:
345 zfree(&evsel->priv);
346 return -ENOENT;
347 }
348
349 static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
350 {
351 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
352
353 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
354 if (IS_ERR(evsel))
355 evsel = perf_evsel__newtp("syscalls", direction);
356
357 if (IS_ERR(evsel))
358 return NULL;
359
360 if (perf_evsel__init_raw_syscall_tp(evsel, handler))
361 goto out_delete;
362
363 return evsel;
364
365 out_delete:
366 perf_evsel__delete_priv(evsel);
367 return NULL;
368 }
369
370 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
371 ({ struct syscall_tp *fields = evsel->priv; \
372 fields->name.integer(&fields->name, sample); })
373
374 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
375 ({ struct syscall_tp *fields = evsel->priv; \
376 fields->name.pointer(&fields->name, sample); })
377
378 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
379 {
380 int idx = val - sa->offset;
381
382 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
383 size_t printed = scnprintf(bf, size, intfmt, val);
384 if (show_prefix)
385 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
386 return printed;
387 }
388
389 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
390 }
391
392 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
393 const char *intfmt,
394 struct syscall_arg *arg)
395 {
396 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
397 }
398
399 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
400 struct syscall_arg *arg)
401 {
402 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
403 }
404
405 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
406
407 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
408 {
409 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
410 }
411
412 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
413 {
414 size_t printed;
415 int i;
416
417 for (i = 0; i < sas->nr_entries; ++i) {
418 struct strarray *sa = sas->entries[i];
419 int idx = val - sa->offset;
420
421 if (idx >= 0 && idx < sa->nr_entries) {
422 if (sa->entries[idx] == NULL)
423 break;
424 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
425 }
426 }
427
428 printed = scnprintf(bf, size, intfmt, val);
429 if (show_prefix)
430 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
431 return printed;
432 }
433
434 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
435 struct syscall_arg *arg)
436 {
437 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
438 }
439
440 #ifndef AT_FDCWD
441 #define AT_FDCWD -100
442 #endif
443
444 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
445 struct syscall_arg *arg)
446 {
447 int fd = arg->val;
448 const char *prefix = "AT_FD";
449
450 if (fd == AT_FDCWD)
451 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
452
453 return syscall_arg__scnprintf_fd(bf, size, arg);
454 }
455
456 #define SCA_FDAT syscall_arg__scnprintf_fd_at
457
458 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
459 struct syscall_arg *arg);
460
461 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
462
463 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
464 {
465 return scnprintf(bf, size, "%#lx", arg->val);
466 }
467
468 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
469 {
470 if (arg->val == 0)
471 return scnprintf(bf, size, "NULL");
472 return syscall_arg__scnprintf_hex(bf, size, arg);
473 }
474
475 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
476 {
477 return scnprintf(bf, size, "%d", arg->val);
478 }
479
480 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
481 {
482 return scnprintf(bf, size, "%ld", arg->val);
483 }
484
485 static const char *bpf_cmd[] = {
486 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
487 "MAP_GET_NEXT_KEY", "PROG_LOAD",
488 };
489 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
490
491 static const char *fsmount_flags[] = {
492 [1] = "CLOEXEC",
493 };
494 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
495
496 #include "trace/beauty/generated/fsconfig_arrays.c"
497
498 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
499
500 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
501 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
502
503 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
504 static DEFINE_STRARRAY(itimers, "ITIMER_");
505
506 static const char *keyctl_options[] = {
507 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
508 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
509 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
510 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
511 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
512 };
513 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
514
515 static const char *whences[] = { "SET", "CUR", "END",
516 #ifdef SEEK_DATA
517 "DATA",
518 #endif
519 #ifdef SEEK_HOLE
520 "HOLE",
521 #endif
522 };
523 static DEFINE_STRARRAY(whences, "SEEK_");
524
525 static const char *fcntl_cmds[] = {
526 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
527 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
528 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
529 "GETOWNER_UIDS",
530 };
531 static DEFINE_STRARRAY(fcntl_cmds, "F_");
532
533 static const char *fcntl_linux_specific_cmds[] = {
534 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
535 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
536 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
537 };
538
539 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
540
541 static struct strarray *fcntl_cmds_arrays[] = {
542 &strarray__fcntl_cmds,
543 &strarray__fcntl_linux_specific_cmds,
544 };
545
546 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
547
548 static const char *rlimit_resources[] = {
549 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
550 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
551 "RTTIME",
552 };
553 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
554
555 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
556 static DEFINE_STRARRAY(sighow, "SIG_");
557
558 static const char *clockid[] = {
559 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
560 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
561 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
562 };
563 static DEFINE_STRARRAY(clockid, "CLOCK_");
564
565 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
566 struct syscall_arg *arg)
567 {
568 bool show_prefix = arg->show_string_prefix;
569 const char *suffix = "_OK";
570 size_t printed = 0;
571 int mode = arg->val;
572
573 if (mode == F_OK) /* 0 */
574 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
575 #define P_MODE(n) \
576 if (mode & n##_OK) { \
577 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
578 mode &= ~n##_OK; \
579 }
580
581 P_MODE(R);
582 P_MODE(W);
583 P_MODE(X);
584 #undef P_MODE
585
586 if (mode)
587 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
588
589 return printed;
590 }
591
592 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
593
594 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
595 struct syscall_arg *arg);
596
597 #define SCA_FILENAME syscall_arg__scnprintf_filename
598
599 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
600 struct syscall_arg *arg)
601 {
602 bool show_prefix = arg->show_string_prefix;
603 const char *prefix = "O_";
604 int printed = 0, flags = arg->val;
605
606 #define P_FLAG(n) \
607 if (flags & O_##n) { \
608 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
609 flags &= ~O_##n; \
610 }
611
612 P_FLAG(CLOEXEC);
613 P_FLAG(NONBLOCK);
614 #undef P_FLAG
615
616 if (flags)
617 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
618
619 return printed;
620 }
621
622 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
623
624 #ifndef GRND_NONBLOCK
625 #define GRND_NONBLOCK 0x0001
626 #endif
627 #ifndef GRND_RANDOM
628 #define GRND_RANDOM 0x0002
629 #endif
630
631 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
632 struct syscall_arg *arg)
633 {
634 bool show_prefix = arg->show_string_prefix;
635 const char *prefix = "GRND_";
636 int printed = 0, flags = arg->val;
637
638 #define P_FLAG(n) \
639 if (flags & GRND_##n) { \
640 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
641 flags &= ~GRND_##n; \
642 }
643
644 P_FLAG(RANDOM);
645 P_FLAG(NONBLOCK);
646 #undef P_FLAG
647
648 if (flags)
649 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
650
651 return printed;
652 }
653
654 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
655
656 #define STRARRAY(name, array) \
657 { .scnprintf = SCA_STRARRAY, \
658 .parm = &strarray__##array, }
659
660 #define STRARRAY_FLAGS(name, array) \
661 { .scnprintf = SCA_STRARRAY_FLAGS, \
662 .parm = &strarray__##array, }
663
664 #include "trace/beauty/arch_errno_names.c"
665 #include "trace/beauty/eventfd.c"
666 #include "trace/beauty/futex_op.c"
667 #include "trace/beauty/futex_val3.c"
668 #include "trace/beauty/mmap.c"
669 #include "trace/beauty/mode_t.c"
670 #include "trace/beauty/msg_flags.c"
671 #include "trace/beauty/open_flags.c"
672 #include "trace/beauty/perf_event_open.c"
673 #include "trace/beauty/pid.c"
674 #include "trace/beauty/sched_policy.c"
675 #include "trace/beauty/seccomp.c"
676 #include "trace/beauty/signum.c"
677 #include "trace/beauty/socket_type.c"
678 #include "trace/beauty/waitid_options.c"
679
680 struct syscall_arg_fmt {
681 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
682 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
683 void *parm;
684 const char *name;
685 bool show_zero;
686 };
687
688 static struct syscall_fmt {
689 const char *name;
690 const char *alias;
691 struct syscall_arg_fmt arg[6];
692 u8 nr_args;
693 bool errpid;
694 bool timeout;
695 bool hexret;
696 } syscall_fmts[] = {
697 { .name = "access",
698 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
699 { .name = "arch_prctl",
700 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
701 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
702 { .name = "bind",
703 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, },
704 { .name = "bpf",
705 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
706 { .name = "brk", .hexret = true,
707 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
708 { .name = "clock_gettime",
709 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
710 { .name = "clone", .errpid = true, .nr_args = 5,
711 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
712 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
713 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
714 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
715 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
716 { .name = "close",
717 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
718 { .name = "connect",
719 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, },
720 { .name = "epoll_ctl",
721 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
722 { .name = "eventfd2",
723 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
724 { .name = "fchmodat",
725 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
726 { .name = "fchownat",
727 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
728 { .name = "fcntl",
729 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
730 .parm = &strarrays__fcntl_cmds_arrays,
731 .show_zero = true, },
732 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
733 { .name = "flock",
734 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
735 { .name = "fsconfig",
736 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
737 { .name = "fsmount",
738 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
739 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
740 { .name = "fspick",
741 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
742 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
743 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
744 { .name = "fstat", .alias = "newfstat", },
745 { .name = "fstatat", .alias = "newfstatat", },
746 { .name = "futex",
747 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
748 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
749 { .name = "futimesat",
750 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
751 { .name = "getitimer",
752 .arg = { [0] = STRARRAY(which, itimers), }, },
753 { .name = "getpid", .errpid = true, },
754 { .name = "getpgid", .errpid = true, },
755 { .name = "getppid", .errpid = true, },
756 { .name = "getrandom",
757 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
758 { .name = "getrlimit",
759 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
760 { .name = "gettid", .errpid = true, },
761 { .name = "ioctl",
762 .arg = {
763 #if defined(__i386__) || defined(__x86_64__)
764 /*
765 * FIXME: Make this available to all arches.
766 */
767 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
768 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
769 #else
770 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
771 #endif
772 { .name = "kcmp", .nr_args = 5,
773 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
774 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
775 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
776 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
777 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
778 { .name = "keyctl",
779 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
780 { .name = "kill",
781 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
782 { .name = "linkat",
783 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
784 { .name = "lseek",
785 .arg = { [2] = STRARRAY(whence, whences), }, },
786 { .name = "lstat", .alias = "newlstat", },
787 { .name = "madvise",
788 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
789 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
790 { .name = "mkdirat",
791 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
792 { .name = "mknodat",
793 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
794 { .name = "mmap", .hexret = true,
795 /* The standard mmap maps to old_mmap on s390x */
796 #if defined(__s390x__)
797 .alias = "old_mmap",
798 #endif
799 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
800 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ },
801 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
802 { .name = "mount",
803 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
804 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
805 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
806 { .name = "move_mount",
807 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
808 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
809 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
810 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
811 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
812 { .name = "mprotect",
813 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
814 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
815 { .name = "mq_unlink",
816 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
817 { .name = "mremap", .hexret = true,
818 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
819 { .name = "name_to_handle_at",
820 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
821 { .name = "newfstatat",
822 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
823 { .name = "open",
824 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
825 { .name = "open_by_handle_at",
826 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
827 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
828 { .name = "openat",
829 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
830 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
831 { .name = "perf_event_open",
832 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
833 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
834 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
835 { .name = "pipe2",
836 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
837 { .name = "pkey_alloc",
838 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
839 { .name = "pkey_free",
840 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
841 { .name = "pkey_mprotect",
842 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
843 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
844 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
845 { .name = "poll", .timeout = true, },
846 { .name = "ppoll", .timeout = true, },
847 { .name = "prctl",
848 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
849 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
850 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
851 { .name = "pread", .alias = "pread64", },
852 { .name = "preadv", .alias = "pread", },
853 { .name = "prlimit64",
854 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
855 { .name = "pwrite", .alias = "pwrite64", },
856 { .name = "readlinkat",
857 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
858 { .name = "recvfrom",
859 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
860 { .name = "recvmmsg",
861 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
862 { .name = "recvmsg",
863 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
864 { .name = "renameat",
865 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
866 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
867 { .name = "renameat2",
868 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
869 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
870 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
871 { .name = "rt_sigaction",
872 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
873 { .name = "rt_sigprocmask",
874 .arg = { [0] = STRARRAY(how, sighow), }, },
875 { .name = "rt_sigqueueinfo",
876 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
877 { .name = "rt_tgsigqueueinfo",
878 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
879 { .name = "sched_setscheduler",
880 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
881 { .name = "seccomp",
882 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
883 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
884 { .name = "select", .timeout = true, },
885 { .name = "sendmmsg",
886 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
887 { .name = "sendmsg",
888 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
889 { .name = "sendto",
890 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
891 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
892 { .name = "set_tid_address", .errpid = true, },
893 { .name = "setitimer",
894 .arg = { [0] = STRARRAY(which, itimers), }, },
895 { .name = "setrlimit",
896 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
897 { .name = "socket",
898 .arg = { [0] = STRARRAY(family, socket_families),
899 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
900 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
901 { .name = "socketpair",
902 .arg = { [0] = STRARRAY(family, socket_families),
903 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
904 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
905 { .name = "stat", .alias = "newstat", },
906 { .name = "statx",
907 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
908 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
909 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
910 { .name = "swapoff",
911 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
912 { .name = "swapon",
913 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
914 { .name = "symlinkat",
915 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
916 { .name = "sync_file_range",
917 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
918 { .name = "tgkill",
919 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
920 { .name = "tkill",
921 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
922 { .name = "umount2", .alias = "umount",
923 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
924 { .name = "uname", .alias = "newuname", },
925 { .name = "unlinkat",
926 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
927 { .name = "utimensat",
928 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
929 { .name = "wait4", .errpid = true,
930 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
931 { .name = "waitid", .errpid = true,
932 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
933 };
934
935 static int syscall_fmt__cmp(const void *name, const void *fmtp)
936 {
937 const struct syscall_fmt *fmt = fmtp;
938 return strcmp(name, fmt->name);
939 }
940
941 static struct syscall_fmt *syscall_fmt__find(const char *name)
942 {
943 const int nmemb = ARRAY_SIZE(syscall_fmts);
944 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
945 }
946
947 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
948 {
949 int i, nmemb = ARRAY_SIZE(syscall_fmts);
950
951 for (i = 0; i < nmemb; ++i) {
952 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0)
953 return &syscall_fmts[i];
954 }
955
956 return NULL;
957 }
958
959 /*
960 * is_exit: is this "exit" or "exit_group"?
961 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
962 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
963 */
964 struct syscall {
965 struct tep_event *tp_format;
966 int nr_args;
967 int args_size;
968 bool is_exit;
969 bool is_open;
970 struct tep_format_field *args;
971 const char *name;
972 struct syscall_fmt *fmt;
973 struct syscall_arg_fmt *arg_fmt;
974 };
975
976 /*
977 * Must match what is in the BPF program:
978 *
979 * tools/perf/examples/bpf/augmented_raw_syscalls.c
980 */
981 struct bpf_map_syscall_entry {
982 bool enabled;
983 u16 string_args_len[6];
984 };
985
986 /*
987 * We need to have this 'calculated' boolean because in some cases we really
988 * don't know what is the duration of a syscall, for instance, when we start
989 * a session and some threads are waiting for a syscall to finish, say 'poll',
990 * in which case all we can do is to print "( ? ) for duration and for the
991 * start timestamp.
992 */
993 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
994 {
995 double duration = (double)t / NSEC_PER_MSEC;
996 size_t printed = fprintf(fp, "(");
997
998 if (!calculated)
999 printed += fprintf(fp, " ");
1000 else if (duration >= 1.0)
1001 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1002 else if (duration >= 0.01)
1003 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1004 else
1005 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1006 return printed + fprintf(fp, "): ");
1007 }
1008
1009 /**
1010 * filename.ptr: The filename char pointer that will be vfs_getname'd
1011 * filename.entry_str_pos: Where to insert the string translated from
1012 * filename.ptr by the vfs_getname tracepoint/kprobe.
1013 * ret_scnprintf: syscall args may set this to a different syscall return
1014 * formatter, for instance, fcntl may return fds, file flags, etc.
1015 */
1016 struct thread_trace {
1017 u64 entry_time;
1018 bool entry_pending;
1019 unsigned long nr_events;
1020 unsigned long pfmaj, pfmin;
1021 char *entry_str;
1022 double runtime_ms;
1023 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1024 struct {
1025 unsigned long ptr;
1026 short int entry_str_pos;
1027 bool pending_open;
1028 unsigned int namelen;
1029 char *name;
1030 } filename;
1031 struct {
1032 int max;
1033 struct file *table;
1034 } files;
1035
1036 struct intlist *syscall_stats;
1037 };
1038
1039 static struct thread_trace *thread_trace__new(void)
1040 {
1041 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1042
1043 if (ttrace) {
1044 ttrace->files.max = -1;
1045 ttrace->syscall_stats = intlist__new(NULL);
1046 }
1047
1048 return ttrace;
1049 }
1050
1051 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1052 {
1053 struct thread_trace *ttrace;
1054
1055 if (thread == NULL)
1056 goto fail;
1057
1058 if (thread__priv(thread) == NULL)
1059 thread__set_priv(thread, thread_trace__new());
1060
1061 if (thread__priv(thread) == NULL)
1062 goto fail;
1063
1064 ttrace = thread__priv(thread);
1065 ++ttrace->nr_events;
1066
1067 return ttrace;
1068 fail:
1069 color_fprintf(fp, PERF_COLOR_RED,
1070 "WARNING: not enough memory, dropping samples!\n");
1071 return NULL;
1072 }
1073
1074
1075 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1076 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1077 {
1078 struct thread_trace *ttrace = thread__priv(arg->thread);
1079
1080 ttrace->ret_scnprintf = ret_scnprintf;
1081 }
1082
1083 #define TRACE_PFMAJ (1 << 0)
1084 #define TRACE_PFMIN (1 << 1)
1085
1086 static const size_t trace__entry_str_size = 2048;
1087
1088 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1089 {
1090 if (fd < 0)
1091 return NULL;
1092
1093 if (fd > ttrace->files.max) {
1094 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1095
1096 if (nfiles == NULL)
1097 return NULL;
1098
1099 if (ttrace->files.max != -1) {
1100 memset(nfiles + ttrace->files.max + 1, 0,
1101 (fd - ttrace->files.max) * sizeof(struct file));
1102 } else {
1103 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1104 }
1105
1106 ttrace->files.table = nfiles;
1107 ttrace->files.max = fd;
1108 }
1109
1110 return ttrace->files.table + fd;
1111 }
1112
1113 struct file *thread__files_entry(struct thread *thread, int fd)
1114 {
1115 return thread_trace__files_entry(thread__priv(thread), fd);
1116 }
1117
1118 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1119 {
1120 struct thread_trace *ttrace = thread__priv(thread);
1121 struct file *file = thread_trace__files_entry(ttrace, fd);
1122
1123 if (file != NULL) {
1124 struct stat st;
1125 if (stat(pathname, &st) == 0)
1126 file->dev_maj = major(st.st_rdev);
1127 file->pathname = strdup(pathname);
1128 if (file->pathname)
1129 return 0;
1130 }
1131
1132 return -1;
1133 }
1134
1135 static int thread__read_fd_path(struct thread *thread, int fd)
1136 {
1137 char linkname[PATH_MAX], pathname[PATH_MAX];
1138 struct stat st;
1139 int ret;
1140
1141 if (thread->pid_ == thread->tid) {
1142 scnprintf(linkname, sizeof(linkname),
1143 "/proc/%d/fd/%d", thread->pid_, fd);
1144 } else {
1145 scnprintf(linkname, sizeof(linkname),
1146 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1147 }
1148
1149 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1150 return -1;
1151
1152 ret = readlink(linkname, pathname, sizeof(pathname));
1153
1154 if (ret < 0 || ret > st.st_size)
1155 return -1;
1156
1157 pathname[ret] = '\0';
1158 return trace__set_fd_pathname(thread, fd, pathname);
1159 }
1160
1161 static const char *thread__fd_path(struct thread *thread, int fd,
1162 struct trace *trace)
1163 {
1164 struct thread_trace *ttrace = thread__priv(thread);
1165
1166 if (ttrace == NULL)
1167 return NULL;
1168
1169 if (fd < 0)
1170 return NULL;
1171
1172 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1173 if (!trace->live)
1174 return NULL;
1175 ++trace->stats.proc_getname;
1176 if (thread__read_fd_path(thread, fd))
1177 return NULL;
1178 }
1179
1180 return ttrace->files.table[fd].pathname;
1181 }
1182
1183 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1184 {
1185 int fd = arg->val;
1186 size_t printed = scnprintf(bf, size, "%d", fd);
1187 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1188
1189 if (path)
1190 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1191
1192 return printed;
1193 }
1194
1195 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1196 {
1197 size_t printed = scnprintf(bf, size, "%d", fd);
1198 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1199
1200 if (thread) {
1201 const char *path = thread__fd_path(thread, fd, trace);
1202
1203 if (path)
1204 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1205
1206 thread__put(thread);
1207 }
1208
1209 return printed;
1210 }
1211
1212 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1213 struct syscall_arg *arg)
1214 {
1215 int fd = arg->val;
1216 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1217 struct thread_trace *ttrace = thread__priv(arg->thread);
1218
1219 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1220 zfree(&ttrace->files.table[fd].pathname);
1221
1222 return printed;
1223 }
1224
1225 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1226 unsigned long ptr)
1227 {
1228 struct thread_trace *ttrace = thread__priv(thread);
1229
1230 ttrace->filename.ptr = ptr;
1231 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1232 }
1233
1234 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1235 {
1236 struct augmented_arg *augmented_arg = arg->augmented.args;
1237 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1238 /*
1239 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1240 * we would have two strings, each prefixed by its size.
1241 */
1242 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1243
1244 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1245 arg->augmented.size -= consumed;
1246
1247 return printed;
1248 }
1249
1250 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1251 struct syscall_arg *arg)
1252 {
1253 unsigned long ptr = arg->val;
1254
1255 if (arg->augmented.args)
1256 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1257
1258 if (!arg->trace->vfs_getname)
1259 return scnprintf(bf, size, "%#x", ptr);
1260
1261 thread__set_filename_pos(arg->thread, bf, ptr);
1262 return 0;
1263 }
1264
1265 static bool trace__filter_duration(struct trace *trace, double t)
1266 {
1267 return t < (trace->duration_filter * NSEC_PER_MSEC);
1268 }
1269
1270 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1271 {
1272 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1273
1274 return fprintf(fp, "%10.3f ", ts);
1275 }
1276
1277 /*
1278 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1279 * using ttrace->entry_time for a thread that receives a sys_exit without
1280 * first having received a sys_enter ("poll" issued before tracing session
1281 * starts, lost sys_enter exit due to ring buffer overflow).
1282 */
1283 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1284 {
1285 if (tstamp > 0)
1286 return __trace__fprintf_tstamp(trace, tstamp, fp);
1287
1288 return fprintf(fp, " ? ");
1289 }
1290
1291 static bool done = false;
1292 static bool interrupted = false;
1293
1294 static void sig_handler(int sig)
1295 {
1296 done = true;
1297 interrupted = sig == SIGINT;
1298 }
1299
1300 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1301 {
1302 size_t printed = 0;
1303
1304 if (trace->multiple_threads) {
1305 if (trace->show_comm)
1306 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1307 printed += fprintf(fp, "%d ", thread->tid);
1308 }
1309
1310 return printed;
1311 }
1312
1313 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1314 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1315 {
1316 size_t printed = 0;
1317
1318 if (trace->show_tstamp)
1319 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1320 if (trace->show_duration)
1321 printed += fprintf_duration(duration, duration_calculated, fp);
1322 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1323 }
1324
1325 static int trace__process_event(struct trace *trace, struct machine *machine,
1326 union perf_event *event, struct perf_sample *sample)
1327 {
1328 int ret = 0;
1329
1330 switch (event->header.type) {
1331 case PERF_RECORD_LOST:
1332 color_fprintf(trace->output, PERF_COLOR_RED,
1333 "LOST %" PRIu64 " events!\n", event->lost.lost);
1334 ret = machine__process_lost_event(machine, event, sample);
1335 break;
1336 default:
1337 ret = machine__process_event(machine, event, sample);
1338 break;
1339 }
1340
1341 return ret;
1342 }
1343
1344 static int trace__tool_process(struct perf_tool *tool,
1345 union perf_event *event,
1346 struct perf_sample *sample,
1347 struct machine *machine)
1348 {
1349 struct trace *trace = container_of(tool, struct trace, tool);
1350 return trace__process_event(trace, machine, event, sample);
1351 }
1352
1353 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1354 {
1355 struct machine *machine = vmachine;
1356
1357 if (machine->kptr_restrict_warned)
1358 return NULL;
1359
1360 if (symbol_conf.kptr_restrict) {
1361 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1362 "Check /proc/sys/kernel/kptr_restrict.\n\n"
1363 "Kernel samples will not be resolved.\n");
1364 machine->kptr_restrict_warned = true;
1365 return NULL;
1366 }
1367
1368 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1369 }
1370
1371 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
1372 {
1373 int err = symbol__init(NULL);
1374
1375 if (err)
1376 return err;
1377
1378 trace->host = machine__new_host();
1379 if (trace->host == NULL)
1380 return -ENOMEM;
1381
1382 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1383 if (err < 0)
1384 goto out;
1385
1386 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1387 evlist->threads, trace__tool_process, false,
1388 1);
1389 out:
1390 if (err)
1391 symbol__exit();
1392
1393 return err;
1394 }
1395
1396 static void trace__symbols__exit(struct trace *trace)
1397 {
1398 machine__exit(trace->host);
1399 trace->host = NULL;
1400
1401 symbol__exit();
1402 }
1403
1404 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1405 {
1406 int idx;
1407
1408 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1409 nr_args = sc->fmt->nr_args;
1410
1411 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1412 if (sc->arg_fmt == NULL)
1413 return -1;
1414
1415 for (idx = 0; idx < nr_args; ++idx) {
1416 if (sc->fmt)
1417 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1418 }
1419
1420 sc->nr_args = nr_args;
1421 return 0;
1422 }
1423
1424 static int syscall__set_arg_fmts(struct syscall *sc)
1425 {
1426 struct tep_format_field *field, *last_field = NULL;
1427 int idx = 0, len;
1428
1429 for (field = sc->args; field; field = field->next, ++idx) {
1430 last_field = field;
1431
1432 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1433 continue;
1434
1435 len = strlen(field->name);
1436
1437 if (strcmp(field->type, "const char *") == 0 &&
1438 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1439 strstr(field->name, "path") != NULL))
1440 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1441 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1442 sc->arg_fmt[idx].scnprintf = SCA_PTR;
1443 else if (strcmp(field->type, "pid_t") == 0)
1444 sc->arg_fmt[idx].scnprintf = SCA_PID;
1445 else if (strcmp(field->type, "umode_t") == 0)
1446 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1447 else if ((strcmp(field->type, "int") == 0 ||
1448 strcmp(field->type, "unsigned int") == 0 ||
1449 strcmp(field->type, "long") == 0) &&
1450 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1451 /*
1452 * /sys/kernel/tracing/events/syscalls/sys_enter*
1453 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1454 * 65 int
1455 * 23 unsigned int
1456 * 7 unsigned long
1457 */
1458 sc->arg_fmt[idx].scnprintf = SCA_FD;
1459 }
1460 }
1461
1462 if (last_field)
1463 sc->args_size = last_field->offset + last_field->size;
1464
1465 return 0;
1466 }
1467
1468 static int trace__read_syscall_info(struct trace *trace, int id)
1469 {
1470 char tp_name[128];
1471 struct syscall *sc;
1472 const char *name = syscalltbl__name(trace->sctbl, id);
1473
1474 if (name == NULL)
1475 return -1;
1476
1477 if (id > trace->syscalls.max) {
1478 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1479
1480 if (nsyscalls == NULL)
1481 return -1;
1482
1483 if (trace->syscalls.max != -1) {
1484 memset(nsyscalls + trace->syscalls.max + 1, 0,
1485 (id - trace->syscalls.max) * sizeof(*sc));
1486 } else {
1487 memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
1488 }
1489
1490 trace->syscalls.table = nsyscalls;
1491 trace->syscalls.max = id;
1492 }
1493
1494 sc = trace->syscalls.table + id;
1495 sc->name = name;
1496
1497 sc->fmt = syscall_fmt__find(sc->name);
1498
1499 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1500 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1501
1502 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1503 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1504 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1505 }
1506
1507 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1508 return -1;
1509
1510 if (IS_ERR(sc->tp_format))
1511 return -1;
1512
1513 sc->args = sc->tp_format->format.fields;
1514 /*
1515 * We need to check and discard the first variable '__syscall_nr'
1516 * or 'nr' that mean the syscall number. It is needless here.
1517 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1518 */
1519 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1520 sc->args = sc->args->next;
1521 --sc->nr_args;
1522 }
1523
1524 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1525 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1526
1527 return syscall__set_arg_fmts(sc);
1528 }
1529
1530 static int trace__validate_ev_qualifier(struct trace *trace)
1531 {
1532 int err = 0;
1533 bool printed_invalid_prefix = false;
1534 struct str_node *pos;
1535 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1536
1537 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1538 sizeof(trace->ev_qualifier_ids.entries[0]));
1539
1540 if (trace->ev_qualifier_ids.entries == NULL) {
1541 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1542 trace->output);
1543 err = -EINVAL;
1544 goto out;
1545 }
1546
1547 strlist__for_each_entry(pos, trace->ev_qualifier) {
1548 const char *sc = pos->s;
1549 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1550
1551 if (id < 0) {
1552 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1553 if (id >= 0)
1554 goto matches;
1555
1556 if (!printed_invalid_prefix) {
1557 pr_debug("Skipping unknown syscalls: ");
1558 printed_invalid_prefix = true;
1559 } else {
1560 pr_debug(", ");
1561 }
1562
1563 pr_debug("%s", sc);
1564 continue;
1565 }
1566 matches:
1567 trace->ev_qualifier_ids.entries[nr_used++] = id;
1568 if (match_next == -1)
1569 continue;
1570
1571 while (1) {
1572 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1573 if (id < 0)
1574 break;
1575 if (nr_allocated == nr_used) {
1576 void *entries;
1577
1578 nr_allocated += 8;
1579 entries = realloc(trace->ev_qualifier_ids.entries,
1580 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1581 if (entries == NULL) {
1582 err = -ENOMEM;
1583 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1584 goto out_free;
1585 }
1586 trace->ev_qualifier_ids.entries = entries;
1587 }
1588 trace->ev_qualifier_ids.entries[nr_used++] = id;
1589 }
1590 }
1591
1592 trace->ev_qualifier_ids.nr = nr_used;
1593 out:
1594 if (printed_invalid_prefix)
1595 pr_debug("\n");
1596 return err;
1597 out_free:
1598 zfree(&trace->ev_qualifier_ids.entries);
1599 trace->ev_qualifier_ids.nr = 0;
1600 goto out;
1601 }
1602
1603 /*
1604 * args is to be interpreted as a series of longs but we need to handle
1605 * 8-byte unaligned accesses. args points to raw_data within the event
1606 * and raw_data is guaranteed to be 8-byte unaligned because it is
1607 * preceded by raw_size which is a u32. So we need to copy args to a temp
1608 * variable to read it. Most notably this avoids extended load instructions
1609 * on unaligned addresses
1610 */
1611 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1612 {
1613 unsigned long val;
1614 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1615
1616 memcpy(&val, p, sizeof(val));
1617 return val;
1618 }
1619
1620 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1621 struct syscall_arg *arg)
1622 {
1623 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1624 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1625
1626 return scnprintf(bf, size, "arg%d: ", arg->idx);
1627 }
1628
1629 /*
1630 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1631 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1632 * in tools/perf/trace/beauty/mount_flags.c
1633 */
1634 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val)
1635 {
1636 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val)
1637 return sc->arg_fmt[arg->idx].mask_val(arg, val);
1638
1639 return val;
1640 }
1641
1642 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1643 struct syscall_arg *arg, unsigned long val)
1644 {
1645 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1646 arg->val = val;
1647 if (sc->arg_fmt[arg->idx].parm)
1648 arg->parm = sc->arg_fmt[arg->idx].parm;
1649 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1650 }
1651 return scnprintf(bf, size, "%ld", val);
1652 }
1653
1654 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1655 unsigned char *args, void *augmented_args, int augmented_args_size,
1656 struct trace *trace, struct thread *thread)
1657 {
1658 size_t printed = 0;
1659 unsigned long val;
1660 u8 bit = 1;
1661 struct syscall_arg arg = {
1662 .args = args,
1663 .augmented = {
1664 .size = augmented_args_size,
1665 .args = augmented_args,
1666 },
1667 .idx = 0,
1668 .mask = 0,
1669 .trace = trace,
1670 .thread = thread,
1671 .show_string_prefix = trace->show_string_prefix,
1672 };
1673 struct thread_trace *ttrace = thread__priv(thread);
1674
1675 /*
1676 * Things like fcntl will set this in its 'cmd' formatter to pick the
1677 * right formatter for the return value (an fd? file flags?), which is
1678 * not needed for syscalls that always return a given type, say an fd.
1679 */
1680 ttrace->ret_scnprintf = NULL;
1681
1682 if (sc->args != NULL) {
1683 struct tep_format_field *field;
1684
1685 for (field = sc->args; field;
1686 field = field->next, ++arg.idx, bit <<= 1) {
1687 if (arg.mask & bit)
1688 continue;
1689
1690 val = syscall_arg__val(&arg, arg.idx);
1691 /*
1692 * Some syscall args need some mask, most don't and
1693 * return val untouched.
1694 */
1695 val = syscall__mask_val(sc, &arg, val);
1696
1697 /*
1698 * Suppress this argument if its value is zero and
1699 * and we don't have a string associated in an
1700 * strarray for it.
1701 */
1702 if (val == 0 &&
1703 !trace->show_zeros &&
1704 !(sc->arg_fmt &&
1705 (sc->arg_fmt[arg.idx].show_zero ||
1706 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1707 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1708 sc->arg_fmt[arg.idx].parm))
1709 continue;
1710
1711 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
1712
1713 if (trace->show_arg_names)
1714 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
1715
1716 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1717 }
1718 } else if (IS_ERR(sc->tp_format)) {
1719 /*
1720 * If we managed to read the tracepoint /format file, then we
1721 * may end up not having any args, like with gettid(), so only
1722 * print the raw args when we didn't manage to read it.
1723 */
1724 while (arg.idx < sc->nr_args) {
1725 if (arg.mask & bit)
1726 goto next_arg;
1727 val = syscall_arg__val(&arg, arg.idx);
1728 if (printed)
1729 printed += scnprintf(bf + printed, size - printed, ", ");
1730 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1731 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1732 next_arg:
1733 ++arg.idx;
1734 bit <<= 1;
1735 }
1736 }
1737
1738 return printed;
1739 }
1740
1741 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
1742 union perf_event *event,
1743 struct perf_sample *sample);
1744
1745 static struct syscall *trace__syscall_info(struct trace *trace,
1746 struct perf_evsel *evsel, int id)
1747 {
1748
1749 if (id < 0) {
1750
1751 /*
1752 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1753 * before that, leaving at a higher verbosity level till that is
1754 * explained. Reproduced with plain ftrace with:
1755 *
1756 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1757 * grep "NR -1 " /t/trace_pipe
1758 *
1759 * After generating some load on the machine.
1760 */
1761 if (verbose > 1) {
1762 static u64 n;
1763 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1764 id, perf_evsel__name(evsel), ++n);
1765 }
1766 return NULL;
1767 }
1768
1769 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
1770 trace__read_syscall_info(trace, id))
1771 goto out_cant_read;
1772
1773 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
1774 goto out_cant_read;
1775
1776 return &trace->syscalls.table[id];
1777
1778 out_cant_read:
1779 if (verbose > 0) {
1780 fprintf(trace->output, "Problems reading syscall %d", id);
1781 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
1782 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1783 fputs(" information\n", trace->output);
1784 }
1785 return NULL;
1786 }
1787
1788 static void thread__update_stats(struct thread_trace *ttrace,
1789 int id, struct perf_sample *sample)
1790 {
1791 struct int_node *inode;
1792 struct stats *stats;
1793 u64 duration = 0;
1794
1795 inode = intlist__findnew(ttrace->syscall_stats, id);
1796 if (inode == NULL)
1797 return;
1798
1799 stats = inode->priv;
1800 if (stats == NULL) {
1801 stats = malloc(sizeof(struct stats));
1802 if (stats == NULL)
1803 return;
1804 init_stats(stats);
1805 inode->priv = stats;
1806 }
1807
1808 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1809 duration = sample->time - ttrace->entry_time;
1810
1811 update_stats(stats, duration);
1812 }
1813
1814 static int trace__printf_interrupted_entry(struct trace *trace)
1815 {
1816 struct thread_trace *ttrace;
1817 size_t printed;
1818 int len;
1819
1820 if (trace->failure_only || trace->current == NULL)
1821 return 0;
1822
1823 ttrace = thread__priv(trace->current);
1824
1825 if (!ttrace->entry_pending)
1826 return 0;
1827
1828 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1829 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
1830
1831 if (len < trace->args_alignment - 4)
1832 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
1833
1834 printed += fprintf(trace->output, " ...\n");
1835
1836 ttrace->entry_pending = false;
1837 ++trace->nr_events_printed;
1838
1839 return printed;
1840 }
1841
1842 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
1843 struct perf_sample *sample, struct thread *thread)
1844 {
1845 int printed = 0;
1846
1847 if (trace->print_sample) {
1848 double ts = (double)sample->time / NSEC_PER_MSEC;
1849
1850 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1851 perf_evsel__name(evsel), ts,
1852 thread__comm_str(thread),
1853 sample->pid, sample->tid, sample->cpu);
1854 }
1855
1856 return printed;
1857 }
1858
1859 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
1860 {
1861 void *augmented_args = NULL;
1862 /*
1863 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
1864 * and there we get all 6 syscall args plus the tracepoint common fields
1865 * that gets calculated at the start and the syscall_nr (another long).
1866 * So we check if that is the case and if so don't look after the
1867 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
1868 * which is fixed.
1869 *
1870 * We'll revisit this later to pass s->args_size to the BPF augmenter
1871 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
1872 * copies only what we need for each syscall, like what happens when we
1873 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
1874 * traffic to just what is needed for each syscall.
1875 */
1876 int args_size = raw_augmented_args_size ?: sc->args_size;
1877
1878 *augmented_args_size = sample->raw_size - args_size;
1879 if (*augmented_args_size > 0)
1880 augmented_args = sample->raw_data + args_size;
1881
1882 return augmented_args;
1883 }
1884
1885 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
1886 union perf_event *event __maybe_unused,
1887 struct perf_sample *sample)
1888 {
1889 char *msg;
1890 void *args;
1891 int printed = 0;
1892 struct thread *thread;
1893 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1894 int augmented_args_size = 0;
1895 void *augmented_args = NULL;
1896 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1897 struct thread_trace *ttrace;
1898
1899 if (sc == NULL)
1900 return -1;
1901
1902 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1903 ttrace = thread__trace(thread, trace->output);
1904 if (ttrace == NULL)
1905 goto out_put;
1906
1907 trace__fprintf_sample(trace, evsel, sample, thread);
1908
1909 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1910
1911 if (ttrace->entry_str == NULL) {
1912 ttrace->entry_str = malloc(trace__entry_str_size);
1913 if (!ttrace->entry_str)
1914 goto out_put;
1915 }
1916
1917 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1918 trace__printf_interrupted_entry(trace);
1919 /*
1920 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
1921 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
1922 * this breaks syscall__augmented_args() check for augmented args, as we calculate
1923 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
1924 * so when handling, say the openat syscall, we end up getting 6 args for the
1925 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
1926 * thinking that the extra 2 u64 args are the augmented filename, so just check
1927 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
1928 */
1929 if (evsel != trace->syscalls.events.sys_enter)
1930 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1931 ttrace->entry_time = sample->time;
1932 msg = ttrace->entry_str;
1933 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1934
1935 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1936 args, augmented_args, augmented_args_size, trace, thread);
1937
1938 if (sc->is_exit) {
1939 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1940 int alignment = 0;
1941
1942 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
1943 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
1944 if (trace->args_alignment > printed)
1945 alignment = trace->args_alignment - printed;
1946 fprintf(trace->output, "%*s= ?\n", alignment, " ");
1947 }
1948 } else {
1949 ttrace->entry_pending = true;
1950 /* See trace__vfs_getname & trace__sys_exit */
1951 ttrace->filename.pending_open = false;
1952 }
1953
1954 if (trace->current != thread) {
1955 thread__put(trace->current);
1956 trace->current = thread__get(thread);
1957 }
1958 err = 0;
1959 out_put:
1960 thread__put(thread);
1961 return err;
1962 }
1963
1964 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel,
1965 struct perf_sample *sample)
1966 {
1967 struct thread_trace *ttrace;
1968 struct thread *thread;
1969 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1970 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1971 char msg[1024];
1972 void *args, *augmented_args = NULL;
1973 int augmented_args_size;
1974
1975 if (sc == NULL)
1976 return -1;
1977
1978 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1979 ttrace = thread__trace(thread, trace->output);
1980 /*
1981 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
1982 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
1983 */
1984 if (ttrace == NULL)
1985 goto out_put;
1986
1987 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1988 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1989 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
1990 fprintf(trace->output, "%s", msg);
1991 err = 0;
1992 out_put:
1993 thread__put(thread);
1994 return err;
1995 }
1996
1997 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
1998 struct perf_sample *sample,
1999 struct callchain_cursor *cursor)
2000 {
2001 struct addr_location al;
2002 int max_stack = evsel->attr.sample_max_stack ?
2003 evsel->attr.sample_max_stack :
2004 trace->max_stack;
2005 int err;
2006
2007 if (machine__resolve(trace->host, &al, sample) < 0)
2008 return -1;
2009
2010 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2011 addr_location__put(&al);
2012 return err;
2013 }
2014
2015 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2016 {
2017 /* TODO: user-configurable print_opts */
2018 const unsigned int print_opts = EVSEL__PRINT_SYM |
2019 EVSEL__PRINT_DSO |
2020 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2021
2022 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
2023 }
2024
2025 static const char *errno_to_name(struct perf_evsel *evsel, int err)
2026 {
2027 struct perf_env *env = perf_evsel__env(evsel);
2028 const char *arch_name = perf_env__arch(env);
2029
2030 return arch_syscalls__strerrno(arch_name, err);
2031 }
2032
2033 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
2034 union perf_event *event __maybe_unused,
2035 struct perf_sample *sample)
2036 {
2037 long ret;
2038 u64 duration = 0;
2039 bool duration_calculated = false;
2040 struct thread *thread;
2041 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2042 int alignment = trace->args_alignment;
2043 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2044 struct thread_trace *ttrace;
2045
2046 if (sc == NULL)
2047 return -1;
2048
2049 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2050 ttrace = thread__trace(thread, trace->output);
2051 if (ttrace == NULL)
2052 goto out_put;
2053
2054 trace__fprintf_sample(trace, evsel, sample, thread);
2055
2056 if (trace->summary)
2057 thread__update_stats(ttrace, id, sample);
2058
2059 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2060
2061 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2062 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2063 ttrace->filename.pending_open = false;
2064 ++trace->stats.vfs_getname;
2065 }
2066
2067 if (ttrace->entry_time) {
2068 duration = sample->time - ttrace->entry_time;
2069 if (trace__filter_duration(trace, duration))
2070 goto out;
2071 duration_calculated = true;
2072 } else if (trace->duration_filter)
2073 goto out;
2074
2075 if (sample->callchain) {
2076 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2077 if (callchain_ret == 0) {
2078 if (callchain_cursor.nr < trace->min_stack)
2079 goto out;
2080 callchain_ret = 1;
2081 }
2082 }
2083
2084 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2085 goto out;
2086
2087 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2088
2089 if (ttrace->entry_pending) {
2090 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2091 } else {
2092 printed += fprintf(trace->output, " ... [");
2093 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2094 printed += 9;
2095 printed += fprintf(trace->output, "]: %s()", sc->name);
2096 }
2097
2098 printed++; /* the closing ')' */
2099
2100 if (alignment > printed)
2101 alignment -= printed;
2102 else
2103 alignment = 0;
2104
2105 fprintf(trace->output, ")%*s= ", alignment, " ");
2106
2107 if (sc->fmt == NULL) {
2108 if (ret < 0)
2109 goto errno_print;
2110 signed_print:
2111 fprintf(trace->output, "%ld", ret);
2112 } else if (ret < 0) {
2113 errno_print: {
2114 char bf[STRERR_BUFSIZE];
2115 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2116 *e = errno_to_name(evsel, -ret);
2117
2118 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2119 }
2120 } else if (ret == 0 && sc->fmt->timeout)
2121 fprintf(trace->output, "0 (Timeout)");
2122 else if (ttrace->ret_scnprintf) {
2123 char bf[1024];
2124 struct syscall_arg arg = {
2125 .val = ret,
2126 .thread = thread,
2127 .trace = trace,
2128 };
2129 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2130 ttrace->ret_scnprintf = NULL;
2131 fprintf(trace->output, "%s", bf);
2132 } else if (sc->fmt->hexret)
2133 fprintf(trace->output, "%#lx", ret);
2134 else if (sc->fmt->errpid) {
2135 struct thread *child = machine__find_thread(trace->host, ret, ret);
2136
2137 if (child != NULL) {
2138 fprintf(trace->output, "%ld", ret);
2139 if (child->comm_set)
2140 fprintf(trace->output, " (%s)", thread__comm_str(child));
2141 thread__put(child);
2142 }
2143 } else
2144 goto signed_print;
2145
2146 fputc('\n', trace->output);
2147
2148 /*
2149 * We only consider an 'event' for the sake of --max-events a non-filtered
2150 * sys_enter + sys_exit and other tracepoint events.
2151 */
2152 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2153 interrupted = true;
2154
2155 if (callchain_ret > 0)
2156 trace__fprintf_callchain(trace, sample);
2157 else if (callchain_ret < 0)
2158 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2159 out:
2160 ttrace->entry_pending = false;
2161 err = 0;
2162 out_put:
2163 thread__put(thread);
2164 return err;
2165 }
2166
2167 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
2168 union perf_event *event __maybe_unused,
2169 struct perf_sample *sample)
2170 {
2171 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2172 struct thread_trace *ttrace;
2173 size_t filename_len, entry_str_len, to_move;
2174 ssize_t remaining_space;
2175 char *pos;
2176 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2177
2178 if (!thread)
2179 goto out;
2180
2181 ttrace = thread__priv(thread);
2182 if (!ttrace)
2183 goto out_put;
2184
2185 filename_len = strlen(filename);
2186 if (filename_len == 0)
2187 goto out_put;
2188
2189 if (ttrace->filename.namelen < filename_len) {
2190 char *f = realloc(ttrace->filename.name, filename_len + 1);
2191
2192 if (f == NULL)
2193 goto out_put;
2194
2195 ttrace->filename.namelen = filename_len;
2196 ttrace->filename.name = f;
2197 }
2198
2199 strcpy(ttrace->filename.name, filename);
2200 ttrace->filename.pending_open = true;
2201
2202 if (!ttrace->filename.ptr)
2203 goto out_put;
2204
2205 entry_str_len = strlen(ttrace->entry_str);
2206 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2207 if (remaining_space <= 0)
2208 goto out_put;
2209
2210 if (filename_len > (size_t)remaining_space) {
2211 filename += filename_len - remaining_space;
2212 filename_len = remaining_space;
2213 }
2214
2215 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2216 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2217 memmove(pos + filename_len, pos, to_move);
2218 memcpy(pos, filename, filename_len);
2219
2220 ttrace->filename.ptr = 0;
2221 ttrace->filename.entry_str_pos = 0;
2222 out_put:
2223 thread__put(thread);
2224 out:
2225 return 0;
2226 }
2227
2228 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
2229 union perf_event *event __maybe_unused,
2230 struct perf_sample *sample)
2231 {
2232 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2233 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2234 struct thread *thread = machine__findnew_thread(trace->host,
2235 sample->pid,
2236 sample->tid);
2237 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2238
2239 if (ttrace == NULL)
2240 goto out_dump;
2241
2242 ttrace->runtime_ms += runtime_ms;
2243 trace->runtime_ms += runtime_ms;
2244 out_put:
2245 thread__put(thread);
2246 return 0;
2247
2248 out_dump:
2249 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2250 evsel->name,
2251 perf_evsel__strval(evsel, sample, "comm"),
2252 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2253 runtime,
2254 perf_evsel__intval(evsel, sample, "vruntime"));
2255 goto out_put;
2256 }
2257
2258 static int bpf_output__printer(enum binary_printer_ops op,
2259 unsigned int val, void *extra __maybe_unused, FILE *fp)
2260 {
2261 unsigned char ch = (unsigned char)val;
2262
2263 switch (op) {
2264 case BINARY_PRINT_CHAR_DATA:
2265 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2266 case BINARY_PRINT_DATA_BEGIN:
2267 case BINARY_PRINT_LINE_BEGIN:
2268 case BINARY_PRINT_ADDR:
2269 case BINARY_PRINT_NUM_DATA:
2270 case BINARY_PRINT_NUM_PAD:
2271 case BINARY_PRINT_SEP:
2272 case BINARY_PRINT_CHAR_PAD:
2273 case BINARY_PRINT_LINE_END:
2274 case BINARY_PRINT_DATA_END:
2275 default:
2276 break;
2277 }
2278
2279 return 0;
2280 }
2281
2282 static void bpf_output__fprintf(struct trace *trace,
2283 struct perf_sample *sample)
2284 {
2285 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2286 bpf_output__printer, NULL, trace->output);
2287 ++trace->nr_events_printed;
2288 }
2289
2290 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
2291 union perf_event *event __maybe_unused,
2292 struct perf_sample *sample)
2293 {
2294 struct thread *thread;
2295 int callchain_ret = 0;
2296 /*
2297 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2298 * this event's max_events having been hit and this is an entry coming
2299 * from the ring buffer that we should discard, since the max events
2300 * have already been considered/printed.
2301 */
2302 if (evsel->disabled)
2303 return 0;
2304
2305 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2306
2307 if (sample->callchain) {
2308 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2309 if (callchain_ret == 0) {
2310 if (callchain_cursor.nr < trace->min_stack)
2311 goto out;
2312 callchain_ret = 1;
2313 }
2314 }
2315
2316 trace__printf_interrupted_entry(trace);
2317 trace__fprintf_tstamp(trace, sample->time, trace->output);
2318
2319 if (trace->trace_syscalls && trace->show_duration)
2320 fprintf(trace->output, "( ): ");
2321
2322 if (thread)
2323 trace__fprintf_comm_tid(trace, thread, trace->output);
2324
2325 if (evsel == trace->syscalls.events.augmented) {
2326 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2327 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2328
2329 if (sc) {
2330 fprintf(trace->output, "%s(", sc->name);
2331 trace__fprintf_sys_enter(trace, evsel, sample);
2332 fputc(')', trace->output);
2333 goto newline;
2334 }
2335
2336 /*
2337 * XXX: Not having the associated syscall info or not finding/adding
2338 * the thread should never happen, but if it does...
2339 * fall thru and print it as a bpf_output event.
2340 */
2341 }
2342
2343 fprintf(trace->output, "%s:", evsel->name);
2344
2345 if (perf_evsel__is_bpf_output(evsel)) {
2346 bpf_output__fprintf(trace, sample);
2347 } else if (evsel->tp_format) {
2348 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2349 trace__fprintf_sys_enter(trace, evsel, sample)) {
2350 event_format__fprintf(evsel->tp_format, sample->cpu,
2351 sample->raw_data, sample->raw_size,
2352 trace->output);
2353 ++trace->nr_events_printed;
2354
2355 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2356 perf_evsel__disable(evsel);
2357 perf_evsel__close(evsel);
2358 }
2359 }
2360 }
2361
2362 newline:
2363 fprintf(trace->output, "\n");
2364
2365 if (callchain_ret > 0)
2366 trace__fprintf_callchain(trace, sample);
2367 else if (callchain_ret < 0)
2368 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2369 out:
2370 thread__put(thread);
2371 return 0;
2372 }
2373
2374 static void print_location(FILE *f, struct perf_sample *sample,
2375 struct addr_location *al,
2376 bool print_dso, bool print_sym)
2377 {
2378
2379 if ((verbose > 0 || print_dso) && al->map)
2380 fprintf(f, "%s@", al->map->dso->long_name);
2381
2382 if ((verbose > 0 || print_sym) && al->sym)
2383 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2384 al->addr - al->sym->start);
2385 else if (al->map)
2386 fprintf(f, "0x%" PRIx64, al->addr);
2387 else
2388 fprintf(f, "0x%" PRIx64, sample->addr);
2389 }
2390
2391 static int trace__pgfault(struct trace *trace,
2392 struct perf_evsel *evsel,
2393 union perf_event *event __maybe_unused,
2394 struct perf_sample *sample)
2395 {
2396 struct thread *thread;
2397 struct addr_location al;
2398 char map_type = 'd';
2399 struct thread_trace *ttrace;
2400 int err = -1;
2401 int callchain_ret = 0;
2402
2403 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2404
2405 if (sample->callchain) {
2406 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2407 if (callchain_ret == 0) {
2408 if (callchain_cursor.nr < trace->min_stack)
2409 goto out_put;
2410 callchain_ret = 1;
2411 }
2412 }
2413
2414 ttrace = thread__trace(thread, trace->output);
2415 if (ttrace == NULL)
2416 goto out_put;
2417
2418 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2419 ttrace->pfmaj++;
2420 else
2421 ttrace->pfmin++;
2422
2423 if (trace->summary_only)
2424 goto out;
2425
2426 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2427
2428 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2429
2430 fprintf(trace->output, "%sfault [",
2431 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2432 "maj" : "min");
2433
2434 print_location(trace->output, sample, &al, false, true);
2435
2436 fprintf(trace->output, "] => ");
2437
2438 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2439
2440 if (!al.map) {
2441 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2442
2443 if (al.map)
2444 map_type = 'x';
2445 else
2446 map_type = '?';
2447 }
2448
2449 print_location(trace->output, sample, &al, true, false);
2450
2451 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2452
2453 if (callchain_ret > 0)
2454 trace__fprintf_callchain(trace, sample);
2455 else if (callchain_ret < 0)
2456 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2457
2458 ++trace->nr_events_printed;
2459 out:
2460 err = 0;
2461 out_put:
2462 thread__put(thread);
2463 return err;
2464 }
2465
2466 static void trace__set_base_time(struct trace *trace,
2467 struct perf_evsel *evsel,
2468 struct perf_sample *sample)
2469 {
2470 /*
2471 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2472 * and don't use sample->time unconditionally, we may end up having
2473 * some other event in the future without PERF_SAMPLE_TIME for good
2474 * reason, i.e. we may not be interested in its timestamps, just in
2475 * it taking place, picking some piece of information when it
2476 * appears in our event stream (vfs_getname comes to mind).
2477 */
2478 if (trace->base_time == 0 && !trace->full_time &&
2479 (evsel->attr.sample_type & PERF_SAMPLE_TIME))
2480 trace->base_time = sample->time;
2481 }
2482
2483 static int trace__process_sample(struct perf_tool *tool,
2484 union perf_event *event,
2485 struct perf_sample *sample,
2486 struct perf_evsel *evsel,
2487 struct machine *machine __maybe_unused)
2488 {
2489 struct trace *trace = container_of(tool, struct trace, tool);
2490 struct thread *thread;
2491 int err = 0;
2492
2493 tracepoint_handler handler = evsel->handler;
2494
2495 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2496 if (thread && thread__is_filtered(thread))
2497 goto out;
2498
2499 trace__set_base_time(trace, evsel, sample);
2500
2501 if (handler) {
2502 ++trace->nr_events;
2503 handler(trace, evsel, event, sample);
2504 }
2505 out:
2506 thread__put(thread);
2507 return err;
2508 }
2509
2510 static int trace__record(struct trace *trace, int argc, const char **argv)
2511 {
2512 unsigned int rec_argc, i, j;
2513 const char **rec_argv;
2514 const char * const record_args[] = {
2515 "record",
2516 "-R",
2517 "-m", "1024",
2518 "-c", "1",
2519 };
2520
2521 const char * const sc_args[] = { "-e", };
2522 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2523 const char * const majpf_args[] = { "-e", "major-faults" };
2524 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2525 const char * const minpf_args[] = { "-e", "minor-faults" };
2526 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2527
2528 /* +1 is for the event string below */
2529 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2530 majpf_args_nr + minpf_args_nr + argc;
2531 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2532
2533 if (rec_argv == NULL)
2534 return -ENOMEM;
2535
2536 j = 0;
2537 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2538 rec_argv[j++] = record_args[i];
2539
2540 if (trace->trace_syscalls) {
2541 for (i = 0; i < sc_args_nr; i++)
2542 rec_argv[j++] = sc_args[i];
2543
2544 /* event string may be different for older kernels - e.g., RHEL6 */
2545 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2546 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2547 else if (is_valid_tracepoint("syscalls:sys_enter"))
2548 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2549 else {
2550 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2551 free(rec_argv);
2552 return -1;
2553 }
2554 }
2555
2556 if (trace->trace_pgfaults & TRACE_PFMAJ)
2557 for (i = 0; i < majpf_args_nr; i++)
2558 rec_argv[j++] = majpf_args[i];
2559
2560 if (trace->trace_pgfaults & TRACE_PFMIN)
2561 for (i = 0; i < minpf_args_nr; i++)
2562 rec_argv[j++] = minpf_args[i];
2563
2564 for (i = 0; i < (unsigned int)argc; i++)
2565 rec_argv[j++] = argv[i];
2566
2567 return cmd_record(j, rec_argv);
2568 }
2569
2570 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2571
2572 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
2573 {
2574 bool found = false;
2575 struct perf_evsel *evsel, *tmp;
2576 struct parse_events_error err = { .idx = 0, };
2577 int ret = parse_events(evlist, "probe:vfs_getname*", &err);
2578
2579 if (ret)
2580 return false;
2581
2582 evlist__for_each_entry_safe(evlist, evsel, tmp) {
2583 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
2584 continue;
2585
2586 if (perf_evsel__field(evsel, "pathname")) {
2587 evsel->handler = trace__vfs_getname;
2588 found = true;
2589 continue;
2590 }
2591
2592 list_del_init(&evsel->node);
2593 evsel->evlist = NULL;
2594 perf_evsel__delete(evsel);
2595 }
2596
2597 return found;
2598 }
2599
2600 static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
2601 {
2602 struct perf_evsel *evsel;
2603 struct perf_event_attr attr = {
2604 .type = PERF_TYPE_SOFTWARE,
2605 .mmap_data = 1,
2606 };
2607
2608 attr.config = config;
2609 attr.sample_period = 1;
2610
2611 event_attr_init(&attr);
2612
2613 evsel = perf_evsel__new(&attr);
2614 if (evsel)
2615 evsel->handler = trace__pgfault;
2616
2617 return evsel;
2618 }
2619
2620 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2621 {
2622 const u32 type = event->header.type;
2623 struct perf_evsel *evsel;
2624
2625 if (type != PERF_RECORD_SAMPLE) {
2626 trace__process_event(trace, trace->host, event, sample);
2627 return;
2628 }
2629
2630 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2631 if (evsel == NULL) {
2632 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2633 return;
2634 }
2635
2636 trace__set_base_time(trace, evsel, sample);
2637
2638 if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
2639 sample->raw_data == NULL) {
2640 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2641 perf_evsel__name(evsel), sample->tid,
2642 sample->cpu, sample->raw_size);
2643 } else {
2644 tracepoint_handler handler = evsel->handler;
2645 handler(trace, evsel, event, sample);
2646 }
2647
2648 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
2649 interrupted = true;
2650 }
2651
2652 static int trace__add_syscall_newtp(struct trace *trace)
2653 {
2654 int ret = -1;
2655 struct perf_evlist *evlist = trace->evlist;
2656 struct perf_evsel *sys_enter, *sys_exit;
2657
2658 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
2659 if (sys_enter == NULL)
2660 goto out;
2661
2662 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2663 goto out_delete_sys_enter;
2664
2665 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
2666 if (sys_exit == NULL)
2667 goto out_delete_sys_enter;
2668
2669 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2670 goto out_delete_sys_exit;
2671
2672 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2673 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2674
2675 perf_evlist__add(evlist, sys_enter);
2676 perf_evlist__add(evlist, sys_exit);
2677
2678 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2679 /*
2680 * We're interested only in the user space callchain
2681 * leading to the syscall, allow overriding that for
2682 * debugging reasons using --kernel_syscall_callchains
2683 */
2684 sys_exit->attr.exclude_callchain_kernel = 1;
2685 }
2686
2687 trace->syscalls.events.sys_enter = sys_enter;
2688 trace->syscalls.events.sys_exit = sys_exit;
2689
2690 ret = 0;
2691 out:
2692 return ret;
2693
2694 out_delete_sys_exit:
2695 perf_evsel__delete_priv(sys_exit);
2696 out_delete_sys_enter:
2697 perf_evsel__delete_priv(sys_enter);
2698 goto out;
2699 }
2700
2701 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
2702 {
2703 int err = -1;
2704 struct perf_evsel *sys_exit;
2705 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2706 trace->ev_qualifier_ids.nr,
2707 trace->ev_qualifier_ids.entries);
2708
2709 if (filter == NULL)
2710 goto out_enomem;
2711
2712 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2713 filter)) {
2714 sys_exit = trace->syscalls.events.sys_exit;
2715 err = perf_evsel__append_tp_filter(sys_exit, filter);
2716 }
2717
2718 free(filter);
2719 out:
2720 return err;
2721 out_enomem:
2722 errno = ENOMEM;
2723 goto out;
2724 }
2725
2726 #ifdef HAVE_LIBBPF_SUPPORT
2727 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
2728 {
2729 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2730 int arg = 0;
2731
2732 if (sc == NULL)
2733 goto out;
2734
2735 for (; arg < sc->nr_args; ++arg) {
2736 entry->string_args_len[arg] = 0;
2737 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
2738 /* Should be set like strace -s strsize */
2739 entry->string_args_len[arg] = PATH_MAX;
2740 }
2741 }
2742 out:
2743 for (; arg < 6; ++arg)
2744 entry->string_args_len[arg] = 0;
2745 }
2746 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
2747 {
2748 int fd = bpf_map__fd(trace->syscalls.map);
2749 struct bpf_map_syscall_entry value = {
2750 .enabled = !trace->not_ev_qualifier,
2751 };
2752 int err = 0;
2753 size_t i;
2754
2755 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
2756 int key = trace->ev_qualifier_ids.entries[i];
2757
2758 if (value.enabled)
2759 trace__init_bpf_map_syscall_args(trace, key, &value);
2760
2761 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
2762 if (err)
2763 break;
2764 }
2765
2766 return err;
2767 }
2768
2769 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
2770 {
2771 int fd = bpf_map__fd(trace->syscalls.map);
2772 struct bpf_map_syscall_entry value = {
2773 .enabled = enabled,
2774 };
2775 int err = 0, key;
2776
2777 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
2778 if (enabled)
2779 trace__init_bpf_map_syscall_args(trace, key, &value);
2780
2781 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
2782 if (err)
2783 break;
2784 }
2785
2786 return err;
2787 }
2788
2789 static int trace__init_syscalls_bpf_map(struct trace *trace)
2790 {
2791 bool enabled = true;
2792
2793 if (trace->ev_qualifier_ids.nr)
2794 enabled = trace->not_ev_qualifier;
2795
2796 return __trace__init_syscalls_bpf_map(trace, enabled);
2797 }
2798 #else
2799 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
2800 {
2801 return 0;
2802 }
2803
2804 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
2805 {
2806 return 0;
2807 }
2808 #endif // HAVE_LIBBPF_SUPPORT
2809
2810 static int trace__set_ev_qualifier_filter(struct trace *trace)
2811 {
2812 if (trace->syscalls.map)
2813 return trace__set_ev_qualifier_bpf_filter(trace);
2814 if (trace->syscalls.events.sys_enter)
2815 return trace__set_ev_qualifier_tp_filter(trace);
2816 return 0;
2817 }
2818
2819 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
2820 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
2821 {
2822 int err = 0;
2823 #ifdef HAVE_LIBBPF_SUPPORT
2824 bool value = true;
2825 int map_fd = bpf_map__fd(map);
2826 size_t i;
2827
2828 for (i = 0; i < npids; ++i) {
2829 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
2830 if (err)
2831 break;
2832 }
2833 #endif
2834 return err;
2835 }
2836
2837 static int trace__set_filter_loop_pids(struct trace *trace)
2838 {
2839 unsigned int nr = 1, err;
2840 pid_t pids[32] = {
2841 getpid(),
2842 };
2843 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
2844
2845 while (thread && nr < ARRAY_SIZE(pids)) {
2846 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
2847
2848 if (parent == NULL)
2849 break;
2850
2851 if (!strcmp(thread__comm_str(parent), "sshd") ||
2852 strstarts(thread__comm_str(parent), "gnome-terminal")) {
2853 pids[nr++] = parent->tid;
2854 break;
2855 }
2856 thread = parent;
2857 }
2858
2859 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids);
2860 if (!err && trace->filter_pids.map)
2861 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
2862
2863 return err;
2864 }
2865
2866 static int trace__set_filter_pids(struct trace *trace)
2867 {
2868 int err = 0;
2869 /*
2870 * Better not use !target__has_task() here because we need to cover the
2871 * case where no threads were specified in the command line, but a
2872 * workload was, and in that case we will fill in the thread_map when
2873 * we fork the workload in perf_evlist__prepare_workload.
2874 */
2875 if (trace->filter_pids.nr > 0) {
2876 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
2877 trace->filter_pids.entries);
2878 if (!err && trace->filter_pids.map) {
2879 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
2880 trace->filter_pids.entries);
2881 }
2882 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) {
2883 err = trace__set_filter_loop_pids(trace);
2884 }
2885
2886 return err;
2887 }
2888
2889 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
2890 {
2891 struct perf_evlist *evlist = trace->evlist;
2892 struct perf_sample sample;
2893 int err;
2894
2895 err = perf_evlist__parse_sample(evlist, event, &sample);
2896 if (err)
2897 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
2898 else
2899 trace__handle_event(trace, event, &sample);
2900
2901 return 0;
2902 }
2903
2904 static int __trace__flush_events(struct trace *trace)
2905 {
2906 u64 first = ordered_events__first_time(&trace->oe.data);
2907 u64 flush = trace->oe.last - NSEC_PER_SEC;
2908
2909 /* Is there some thing to flush.. */
2910 if (first && first < flush)
2911 return ordered_events__flush_time(&trace->oe.data, flush);
2912
2913 return 0;
2914 }
2915
2916 static int trace__flush_events(struct trace *trace)
2917 {
2918 return !trace->sort_events ? 0 : __trace__flush_events(trace);
2919 }
2920
2921 static int trace__deliver_event(struct trace *trace, union perf_event *event)
2922 {
2923 int err;
2924
2925 if (!trace->sort_events)
2926 return __trace__deliver_event(trace, event);
2927
2928 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
2929 if (err && err != -1)
2930 return err;
2931
2932 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
2933 if (err)
2934 return err;
2935
2936 return trace__flush_events(trace);
2937 }
2938
2939 static int ordered_events__deliver_event(struct ordered_events *oe,
2940 struct ordered_event *event)
2941 {
2942 struct trace *trace = container_of(oe, struct trace, oe.data);
2943
2944 return __trace__deliver_event(trace, event->event);
2945 }
2946
2947 static int trace__run(struct trace *trace, int argc, const char **argv)
2948 {
2949 struct perf_evlist *evlist = trace->evlist;
2950 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
2951 int err = -1, i;
2952 unsigned long before;
2953 const bool forks = argc > 0;
2954 bool draining = false;
2955
2956 trace->live = true;
2957
2958 if (!trace->raw_augmented_syscalls) {
2959 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
2960 goto out_error_raw_syscalls;
2961
2962 if (trace->trace_syscalls)
2963 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
2964 }
2965
2966 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
2967 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
2968 if (pgfault_maj == NULL)
2969 goto out_error_mem;
2970 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
2971 perf_evlist__add(evlist, pgfault_maj);
2972 }
2973
2974 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
2975 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
2976 if (pgfault_min == NULL)
2977 goto out_error_mem;
2978 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
2979 perf_evlist__add(evlist, pgfault_min);
2980 }
2981
2982 if (trace->sched &&
2983 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
2984 trace__sched_stat_runtime))
2985 goto out_error_sched_stat_runtime;
2986
2987 /*
2988 * If a global cgroup was set, apply it to all the events without an
2989 * explicit cgroup. I.e.:
2990 *
2991 * trace -G A -e sched:*switch
2992 *
2993 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
2994 * _and_ sched:sched_switch to the 'A' cgroup, while:
2995 *
2996 * trace -e sched:*switch -G A
2997 *
2998 * will only set the sched:sched_switch event to the 'A' cgroup, all the
2999 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3000 * a cgroup (on the root cgroup, sys wide, etc).
3001 *
3002 * Multiple cgroups:
3003 *
3004 * trace -G A -e sched:*switch -G B
3005 *
3006 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3007 * to the 'B' cgroup.
3008 *
3009 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3010 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3011 */
3012 if (trace->cgroup)
3013 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3014
3015 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3016 if (err < 0) {
3017 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3018 goto out_delete_evlist;
3019 }
3020
3021 err = trace__symbols_init(trace, evlist);
3022 if (err < 0) {
3023 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3024 goto out_delete_evlist;
3025 }
3026
3027 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3028
3029 signal(SIGCHLD, sig_handler);
3030 signal(SIGINT, sig_handler);
3031
3032 if (forks) {
3033 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3034 argv, false, NULL);
3035 if (err < 0) {
3036 fprintf(trace->output, "Couldn't run the workload!\n");
3037 goto out_delete_evlist;
3038 }
3039 }
3040
3041 err = perf_evlist__open(evlist);
3042 if (err < 0)
3043 goto out_error_open;
3044
3045 err = bpf__apply_obj_config();
3046 if (err) {
3047 char errbuf[BUFSIZ];
3048
3049 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3050 pr_err("ERROR: Apply config to BPF failed: %s\n",
3051 errbuf);
3052 goto out_error_open;
3053 }
3054
3055 err = trace__set_filter_pids(trace);
3056 if (err < 0)
3057 goto out_error_mem;
3058
3059 if (trace->syscalls.map)
3060 trace__init_syscalls_bpf_map(trace);
3061
3062 if (trace->ev_qualifier_ids.nr > 0) {
3063 err = trace__set_ev_qualifier_filter(trace);
3064 if (err < 0)
3065 goto out_errno;
3066
3067 if (trace->syscalls.events.sys_exit) {
3068 pr_debug("event qualifier tracepoint filter: %s\n",
3069 trace->syscalls.events.sys_exit->filter);
3070 }
3071 }
3072
3073 err = perf_evlist__apply_filters(evlist, &evsel);
3074 if (err < 0)
3075 goto out_error_apply_filters;
3076
3077 if (trace->dump.map)
3078 bpf_map__fprintf(trace->dump.map, trace->output);
3079
3080 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
3081 if (err < 0)
3082 goto out_error_mmap;
3083
3084 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3085 perf_evlist__enable(evlist);
3086
3087 if (forks)
3088 perf_evlist__start_workload(evlist);
3089
3090 if (trace->opts.initial_delay) {
3091 usleep(trace->opts.initial_delay * 1000);
3092 perf_evlist__enable(evlist);
3093 }
3094
3095 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
3096 evlist->threads->nr > 1 ||
3097 perf_evlist__first(evlist)->attr.inherit;
3098
3099 /*
3100 * Now that we already used evsel->attr to ask the kernel to setup the
3101 * events, lets reuse evsel->attr.sample_max_stack as the limit in
3102 * trace__resolve_callchain(), allowing per-event max-stack settings
3103 * to override an explicitly set --max-stack global setting.
3104 */
3105 evlist__for_each_entry(evlist, evsel) {
3106 if (evsel__has_callchain(evsel) &&
3107 evsel->attr.sample_max_stack == 0)
3108 evsel->attr.sample_max_stack = trace->max_stack;
3109 }
3110 again:
3111 before = trace->nr_events;
3112
3113 for (i = 0; i < evlist->nr_mmaps; i++) {
3114 union perf_event *event;
3115 struct perf_mmap *md;
3116
3117 md = &evlist->mmap[i];
3118 if (perf_mmap__read_init(md) < 0)
3119 continue;
3120
3121 while ((event = perf_mmap__read_event(md)) != NULL) {
3122 ++trace->nr_events;
3123
3124 err = trace__deliver_event(trace, event);
3125 if (err)
3126 goto out_disable;
3127
3128 perf_mmap__consume(md);
3129
3130 if (interrupted)
3131 goto out_disable;
3132
3133 if (done && !draining) {
3134 perf_evlist__disable(evlist);
3135 draining = true;
3136 }
3137 }
3138 perf_mmap__read_done(md);
3139 }
3140
3141 if (trace->nr_events == before) {
3142 int timeout = done ? 100 : -1;
3143
3144 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
3145 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
3146 draining = true;
3147
3148 goto again;
3149 } else {
3150 if (trace__flush_events(trace))
3151 goto out_disable;
3152 }
3153 } else {
3154 goto again;
3155 }
3156
3157 out_disable:
3158 thread__zput(trace->current);
3159
3160 perf_evlist__disable(evlist);
3161
3162 if (trace->sort_events)
3163 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
3164
3165 if (!err) {
3166 if (trace->summary)
3167 trace__fprintf_thread_summary(trace, trace->output);
3168
3169 if (trace->show_tool_stats) {
3170 fprintf(trace->output, "Stats:\n "
3171 " vfs_getname : %" PRIu64 "\n"
3172 " proc_getname: %" PRIu64 "\n",
3173 trace->stats.vfs_getname,
3174 trace->stats.proc_getname);
3175 }
3176 }
3177
3178 out_delete_evlist:
3179 trace__symbols__exit(trace);
3180
3181 perf_evlist__delete(evlist);
3182 cgroup__put(trace->cgroup);
3183 trace->evlist = NULL;
3184 trace->live = false;
3185 return err;
3186 {
3187 char errbuf[BUFSIZ];
3188
3189 out_error_sched_stat_runtime:
3190 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
3191 goto out_error;
3192
3193 out_error_raw_syscalls:
3194 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
3195 goto out_error;
3196
3197 out_error_mmap:
3198 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
3199 goto out_error;
3200
3201 out_error_open:
3202 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
3203
3204 out_error:
3205 fprintf(trace->output, "%s\n", errbuf);
3206 goto out_delete_evlist;
3207
3208 out_error_apply_filters:
3209 fprintf(trace->output,
3210 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
3211 evsel->filter, perf_evsel__name(evsel), errno,
3212 str_error_r(errno, errbuf, sizeof(errbuf)));
3213 goto out_delete_evlist;
3214 }
3215 out_error_mem:
3216 fprintf(trace->output, "Not enough memory to run!\n");
3217 goto out_delete_evlist;
3218
3219 out_errno:
3220 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
3221 goto out_delete_evlist;
3222 }
3223
3224 static int trace__replay(struct trace *trace)
3225 {
3226 const struct perf_evsel_str_handler handlers[] = {
3227 { "probe:vfs_getname", trace__vfs_getname, },
3228 };
3229 struct perf_data data = {
3230 .path = input_name,
3231 .mode = PERF_DATA_MODE_READ,
3232 .force = trace->force,
3233 };
3234 struct perf_session *session;
3235 struct perf_evsel *evsel;
3236 int err = -1;
3237
3238 trace->tool.sample = trace__process_sample;
3239 trace->tool.mmap = perf_event__process_mmap;
3240 trace->tool.mmap2 = perf_event__process_mmap2;
3241 trace->tool.comm = perf_event__process_comm;
3242 trace->tool.exit = perf_event__process_exit;
3243 trace->tool.fork = perf_event__process_fork;
3244 trace->tool.attr = perf_event__process_attr;
3245 trace->tool.tracing_data = perf_event__process_tracing_data;
3246 trace->tool.build_id = perf_event__process_build_id;
3247 trace->tool.namespaces = perf_event__process_namespaces;
3248
3249 trace->tool.ordered_events = true;
3250 trace->tool.ordering_requires_timestamps = true;
3251
3252 /* add tid to output */
3253 trace->multiple_threads = true;
3254
3255 session = perf_session__new(&data, false, &trace->tool);
3256 if (session == NULL)
3257 return -1;
3258
3259 if (trace->opts.target.pid)
3260 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
3261
3262 if (trace->opts.target.tid)
3263 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
3264
3265 if (symbol__init(&session->header.env) < 0)
3266 goto out;
3267
3268 trace->host = &session->machines.host;
3269
3270 err = perf_session__set_tracepoints_handlers(session, handlers);
3271 if (err)
3272 goto out;
3273
3274 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3275 "raw_syscalls:sys_enter");
3276 /* older kernels have syscalls tp versus raw_syscalls */
3277 if (evsel == NULL)
3278 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3279 "syscalls:sys_enter");
3280
3281 if (evsel &&
3282 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
3283 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
3284 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
3285 goto out;
3286 }
3287
3288 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3289 "raw_syscalls:sys_exit");
3290 if (evsel == NULL)
3291 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3292 "syscalls:sys_exit");
3293 if (evsel &&
3294 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
3295 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
3296 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
3297 goto out;
3298 }
3299
3300 evlist__for_each_entry(session->evlist, evsel) {
3301 if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
3302 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
3303 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
3304 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
3305 evsel->handler = trace__pgfault;
3306 }
3307
3308 setup_pager();
3309
3310 err = perf_session__process_events(session);
3311 if (err)
3312 pr_err("Failed to process events, error %d", err);
3313
3314 else if (trace->summary)
3315 trace__fprintf_thread_summary(trace, trace->output);
3316
3317 out:
3318 perf_session__delete(session);
3319
3320 return err;
3321 }
3322
3323 static size_t trace__fprintf_threads_header(FILE *fp)
3324 {
3325 size_t printed;
3326
3327 printed = fprintf(fp, "\n Summary of events:\n\n");
3328
3329 return printed;
3330 }
3331
3332 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
3333 struct stats *stats;
3334 double msecs;
3335 int syscall;
3336 )
3337 {
3338 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
3339 struct stats *stats = source->priv;
3340
3341 entry->syscall = source->i;
3342 entry->stats = stats;
3343 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
3344 }
3345
3346 static size_t thread__dump_stats(struct thread_trace *ttrace,
3347 struct trace *trace, FILE *fp)
3348 {
3349 size_t printed = 0;
3350 struct syscall *sc;
3351 struct rb_node *nd;
3352 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
3353
3354 if (syscall_stats == NULL)
3355 return 0;
3356
3357 printed += fprintf(fp, "\n");
3358
3359 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
3360 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
3361 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
3362
3363 resort_rb__for_each_entry(nd, syscall_stats) {
3364 struct stats *stats = syscall_stats_entry->stats;
3365 if (stats) {
3366 double min = (double)(stats->min) / NSEC_PER_MSEC;
3367 double max = (double)(stats->max) / NSEC_PER_MSEC;
3368 double avg = avg_stats(stats);
3369 double pct;
3370 u64 n = (u64) stats->n;
3371
3372 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
3373 avg /= NSEC_PER_MSEC;
3374
3375 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
3376 printed += fprintf(fp, " %-15s", sc->name);
3377 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
3378 n, syscall_stats_entry->msecs, min, avg);
3379 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
3380 }
3381 }
3382
3383 resort_rb__delete(syscall_stats);
3384 printed += fprintf(fp, "\n\n");
3385
3386 return printed;
3387 }
3388
3389 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
3390 {
3391 size_t printed = 0;
3392 struct thread_trace *ttrace = thread__priv(thread);
3393 double ratio;
3394
3395 if (ttrace == NULL)
3396 return 0;
3397
3398 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
3399
3400 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
3401 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
3402 printed += fprintf(fp, "%.1f%%", ratio);
3403 if (ttrace->pfmaj)
3404 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
3405 if (ttrace->pfmin)
3406 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
3407 if (trace->sched)
3408 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
3409 else if (fputc('\n', fp) != EOF)
3410 ++printed;
3411
3412 printed += thread__dump_stats(ttrace, trace, fp);
3413
3414 return printed;
3415 }
3416
3417 static unsigned long thread__nr_events(struct thread_trace *ttrace)
3418 {
3419 return ttrace ? ttrace->nr_events : 0;
3420 }
3421
3422 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
3423 struct thread *thread;
3424 )
3425 {
3426 entry->thread = rb_entry(nd, struct thread, rb_node);
3427 }
3428
3429 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
3430 {
3431 size_t printed = trace__fprintf_threads_header(fp);
3432 struct rb_node *nd;
3433 int i;
3434
3435 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
3436 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
3437
3438 if (threads == NULL) {
3439 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
3440 return 0;
3441 }
3442
3443 resort_rb__for_each_entry(nd, threads)
3444 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
3445
3446 resort_rb__delete(threads);
3447 }
3448 return printed;
3449 }
3450
3451 static int trace__set_duration(const struct option *opt, const char *str,
3452 int unset __maybe_unused)
3453 {
3454 struct trace *trace = opt->value;
3455
3456 trace->duration_filter = atof(str);
3457 return 0;
3458 }
3459
3460 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
3461 int unset __maybe_unused)
3462 {
3463 int ret = -1;
3464 size_t i;
3465 struct trace *trace = opt->value;
3466 /*
3467 * FIXME: introduce a intarray class, plain parse csv and create a
3468 * { int nr, int entries[] } struct...
3469 */
3470 struct intlist *list = intlist__new(str);
3471
3472 if (list == NULL)
3473 return -1;
3474
3475 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
3476 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
3477
3478 if (trace->filter_pids.entries == NULL)
3479 goto out;
3480
3481 trace->filter_pids.entries[0] = getpid();
3482
3483 for (i = 1; i < trace->filter_pids.nr; ++i)
3484 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
3485
3486 intlist__delete(list);
3487 ret = 0;
3488 out:
3489 return ret;
3490 }
3491
3492 static int trace__open_output(struct trace *trace, const char *filename)
3493 {
3494 struct stat st;
3495
3496 if (!stat(filename, &st) && st.st_size) {
3497 char oldname[PATH_MAX];
3498
3499 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
3500 unlink(oldname);
3501 rename(filename, oldname);
3502 }
3503
3504 trace->output = fopen(filename, "w");
3505
3506 return trace->output == NULL ? -errno : 0;
3507 }
3508
3509 static int parse_pagefaults(const struct option *opt, const char *str,
3510 int unset __maybe_unused)
3511 {
3512 int *trace_pgfaults = opt->value;
3513
3514 if (strcmp(str, "all") == 0)
3515 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
3516 else if (strcmp(str, "maj") == 0)
3517 *trace_pgfaults |= TRACE_PFMAJ;
3518 else if (strcmp(str, "min") == 0)
3519 *trace_pgfaults |= TRACE_PFMIN;
3520 else
3521 return -1;
3522
3523 return 0;
3524 }
3525
3526 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
3527 {
3528 struct perf_evsel *evsel;
3529
3530 evlist__for_each_entry(evlist, evsel)
3531 evsel->handler = handler;
3532 }
3533
3534 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist)
3535 {
3536 struct perf_evsel *evsel;
3537
3538 evlist__for_each_entry(evlist, evsel) {
3539 if (evsel->priv || !evsel->tp_format)
3540 continue;
3541
3542 if (strcmp(evsel->tp_format->system, "syscalls"))
3543 continue;
3544
3545 if (perf_evsel__init_syscall_tp(evsel))
3546 return -1;
3547
3548 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
3549 struct syscall_tp *sc = evsel->priv;
3550
3551 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
3552 return -1;
3553 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
3554 struct syscall_tp *sc = evsel->priv;
3555
3556 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
3557 return -1;
3558 }
3559 }
3560
3561 return 0;
3562 }
3563
3564 /*
3565 * XXX: Hackish, just splitting the combined -e+--event (syscalls
3566 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
3567 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
3568 *
3569 * It'd be better to introduce a parse_options() variant that would return a
3570 * list with the terms it didn't match to an event...
3571 */
3572 static int trace__parse_events_option(const struct option *opt, const char *str,
3573 int unset __maybe_unused)
3574 {
3575 struct trace *trace = (struct trace *)opt->value;
3576 const char *s = str;
3577 char *sep = NULL, *lists[2] = { NULL, NULL, };
3578 int len = strlen(str) + 1, err = -1, list, idx;
3579 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
3580 char group_name[PATH_MAX];
3581 struct syscall_fmt *fmt;
3582
3583 if (strace_groups_dir == NULL)
3584 return -1;
3585
3586 if (*s == '!') {
3587 ++s;
3588 trace->not_ev_qualifier = true;
3589 }
3590
3591 while (1) {
3592 if ((sep = strchr(s, ',')) != NULL)
3593 *sep = '\0';
3594
3595 list = 0;
3596 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
3597 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
3598 list = 1;
3599 goto do_concat;
3600 }
3601
3602 fmt = syscall_fmt__find_by_alias(s);
3603 if (fmt != NULL) {
3604 list = 1;
3605 s = fmt->name;
3606 } else {
3607 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
3608 if (access(group_name, R_OK) == 0)
3609 list = 1;
3610 }
3611 do_concat:
3612 if (lists[list]) {
3613 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
3614 } else {
3615 lists[list] = malloc(len);
3616 if (lists[list] == NULL)
3617 goto out;
3618 strcpy(lists[list], s);
3619 }
3620
3621 if (!sep)
3622 break;
3623
3624 *sep = ',';
3625 s = sep + 1;
3626 }
3627
3628 if (lists[1] != NULL) {
3629 struct strlist_config slist_config = {
3630 .dirname = strace_groups_dir,
3631 };
3632
3633 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
3634 if (trace->ev_qualifier == NULL) {
3635 fputs("Not enough memory to parse event qualifier", trace->output);
3636 goto out;
3637 }
3638
3639 if (trace__validate_ev_qualifier(trace))
3640 goto out;
3641 trace->trace_syscalls = true;
3642 }
3643
3644 err = 0;
3645
3646 if (lists[0]) {
3647 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3648 "event selector. use 'perf list' to list available events",
3649 parse_events_option);
3650 err = parse_events_option(&o, lists[0], 0);
3651 }
3652 out:
3653 if (sep)
3654 *sep = ',';
3655
3656 return err;
3657 }
3658
3659 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3660 {
3661 struct trace *trace = opt->value;
3662
3663 if (!list_empty(&trace->evlist->entries))
3664 return parse_cgroups(opt, str, unset);
3665
3666 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
3667
3668 return 0;
3669 }
3670
3671 static struct bpf_map *bpf__find_map_by_name(const char *name)
3672 {
3673 struct bpf_object *obj, *tmp;
3674
3675 bpf_object__for_each_safe(obj, tmp) {
3676 struct bpf_map *map = bpf_object__find_map_by_name(obj, name);
3677 if (map)
3678 return map;
3679
3680 }
3681
3682 return NULL;
3683 }
3684
3685 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3686 {
3687 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered");
3688 }
3689
3690 static void trace__set_bpf_map_syscalls(struct trace *trace)
3691 {
3692 trace->syscalls.map = bpf__find_map_by_name("syscalls");
3693 }
3694
3695 static int trace__config(const char *var, const char *value, void *arg)
3696 {
3697 struct trace *trace = arg;
3698 int err = 0;
3699
3700 if (!strcmp(var, "trace.add_events")) {
3701 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3702 "event selector. use 'perf list' to list available events",
3703 parse_events_option);
3704 /*
3705 * We can't propagate parse_event_option() return, as it is 1
3706 * for failure while perf_config() expects -1.
3707 */
3708 if (parse_events_option(&o, value, 0))
3709 err = -1;
3710 } else if (!strcmp(var, "trace.show_timestamp")) {
3711 trace->show_tstamp = perf_config_bool(var, value);
3712 } else if (!strcmp(var, "trace.show_duration")) {
3713 trace->show_duration = perf_config_bool(var, value);
3714 } else if (!strcmp(var, "trace.show_arg_names")) {
3715 trace->show_arg_names = perf_config_bool(var, value);
3716 if (!trace->show_arg_names)
3717 trace->show_zeros = true;
3718 } else if (!strcmp(var, "trace.show_zeros")) {
3719 bool new_show_zeros = perf_config_bool(var, value);
3720 if (!trace->show_arg_names && !new_show_zeros) {
3721 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
3722 goto out;
3723 }
3724 trace->show_zeros = new_show_zeros;
3725 } else if (!strcmp(var, "trace.show_prefix")) {
3726 trace->show_string_prefix = perf_config_bool(var, value);
3727 } else if (!strcmp(var, "trace.no_inherit")) {
3728 trace->opts.no_inherit = perf_config_bool(var, value);
3729 } else if (!strcmp(var, "trace.args_alignment")) {
3730 int args_alignment = 0;
3731 if (perf_config_int(&args_alignment, var, value) == 0)
3732 trace->args_alignment = args_alignment;
3733 }
3734 out:
3735 return err;
3736 }
3737
3738 int cmd_trace(int argc, const char **argv)
3739 {
3740 const char *trace_usage[] = {
3741 "perf trace [<options>] [<command>]",
3742 "perf trace [<options>] -- <command> [<options>]",
3743 "perf trace record [<options>] [<command>]",
3744 "perf trace record [<options>] -- <command> [<options>]",
3745 NULL
3746 };
3747 struct trace trace = {
3748 .syscalls = {
3749 . max = -1,
3750 },
3751 .opts = {
3752 .target = {
3753 .uid = UINT_MAX,
3754 .uses_mmap = true,
3755 },
3756 .user_freq = UINT_MAX,
3757 .user_interval = ULLONG_MAX,
3758 .no_buffering = true,
3759 .mmap_pages = UINT_MAX,
3760 },
3761 .output = stderr,
3762 .show_comm = true,
3763 .show_tstamp = true,
3764 .show_duration = true,
3765 .show_arg_names = true,
3766 .args_alignment = 70,
3767 .trace_syscalls = false,
3768 .kernel_syscallchains = false,
3769 .max_stack = UINT_MAX,
3770 .max_events = ULONG_MAX,
3771 };
3772 const char *map_dump_str = NULL;
3773 const char *output_name = NULL;
3774 const struct option trace_options[] = {
3775 OPT_CALLBACK('e', "event", &trace, "event",
3776 "event/syscall selector. use 'perf list' to list available events",
3777 trace__parse_events_option),
3778 OPT_BOOLEAN(0, "comm", &trace.show_comm,
3779 "show the thread COMM next to its id"),
3780 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
3781 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
3782 trace__parse_events_option),
3783 OPT_STRING('o', "output", &output_name, "file", "output file name"),
3784 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
3785 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
3786 "trace events on existing process id"),
3787 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
3788 "trace events on existing thread id"),
3789 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
3790 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
3791 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
3792 "system-wide collection from all CPUs"),
3793 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
3794 "list of cpus to monitor"),
3795 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
3796 "child tasks do not inherit counters"),
3797 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
3798 "number of mmap data pages",
3799 perf_evlist__parse_mmap_pages),
3800 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
3801 "user to profile"),
3802 OPT_CALLBACK(0, "duration", &trace, "float",
3803 "show only events with duration > N.M ms",
3804 trace__set_duration),
3805 #ifdef HAVE_LIBBPF_SUPPORT
3806 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
3807 #endif
3808 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
3809 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
3810 OPT_BOOLEAN('T', "time", &trace.full_time,
3811 "Show full timestamp, not time relative to first start"),
3812 OPT_BOOLEAN(0, "failure", &trace.failure_only,
3813 "Show only syscalls that failed"),
3814 OPT_BOOLEAN('s', "summary", &trace.summary_only,
3815 "Show only syscall summary with statistics"),
3816 OPT_BOOLEAN('S', "with-summary", &trace.summary,
3817 "Show all syscalls and summary with statistics"),
3818 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
3819 "Trace pagefaults", parse_pagefaults, "maj"),
3820 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
3821 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
3822 OPT_CALLBACK(0, "call-graph", &trace.opts,
3823 "record_mode[,record_size]", record_callchain_help,
3824 &record_parse_callchain_opt),
3825 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
3826 "Show the kernel callchains on the syscall exit path"),
3827 OPT_ULONG(0, "max-events", &trace.max_events,
3828 "Set the maximum number of events to print, exit after that is reached. "),
3829 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
3830 "Set the minimum stack depth when parsing the callchain, "
3831 "anything below the specified depth will be ignored."),
3832 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
3833 "Set the maximum stack depth when parsing the callchain, "
3834 "anything beyond the specified depth will be ignored. "
3835 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
3836 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
3837 "Sort batch of events before processing, use if getting out of order events"),
3838 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
3839 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
3840 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
3841 "per thread proc mmap processing timeout in ms"),
3842 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
3843 trace__parse_cgroups),
3844 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
3845 "ms to wait before starting measurement after program "
3846 "start"),
3847 OPT_END()
3848 };
3849 bool __maybe_unused max_stack_user_set = true;
3850 bool mmap_pages_user_set = true;
3851 struct perf_evsel *evsel;
3852 const char * const trace_subcommands[] = { "record", NULL };
3853 int err = -1;
3854 char bf[BUFSIZ];
3855
3856 signal(SIGSEGV, sighandler_dump_stack);
3857 signal(SIGFPE, sighandler_dump_stack);
3858
3859 trace.evlist = perf_evlist__new();
3860 trace.sctbl = syscalltbl__new();
3861
3862 if (trace.evlist == NULL || trace.sctbl == NULL) {
3863 pr_err("Not enough memory to run!\n");
3864 err = -ENOMEM;
3865 goto out;
3866 }
3867
3868 /*
3869 * Parsing .perfconfig may entail creating a BPF event, that may need
3870 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
3871 * is too small. This affects just this process, not touching the
3872 * global setting. If it fails we'll get something in 'perf trace -v'
3873 * to help diagnose the problem.
3874 */
3875 rlimit__bump_memlock();
3876
3877 err = perf_config(trace__config, &trace);
3878 if (err)
3879 goto out;
3880
3881 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
3882 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
3883
3884 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
3885 usage_with_options_msg(trace_usage, trace_options,
3886 "cgroup monitoring only available in system-wide mode");
3887 }
3888
3889 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
3890 if (IS_ERR(evsel)) {
3891 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
3892 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
3893 goto out;
3894 }
3895
3896 if (evsel) {
3897 trace.syscalls.events.augmented = evsel;
3898 trace__set_bpf_map_filtered_pids(&trace);
3899 trace__set_bpf_map_syscalls(&trace);
3900 }
3901
3902 err = bpf__setup_stdout(trace.evlist);
3903 if (err) {
3904 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
3905 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
3906 goto out;
3907 }
3908
3909 err = -1;
3910
3911 if (map_dump_str) {
3912 trace.dump.map = bpf__find_map_by_name(map_dump_str);
3913 if (trace.dump.map == NULL) {
3914 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
3915 goto out;
3916 }
3917 }
3918
3919 if (trace.trace_pgfaults) {
3920 trace.opts.sample_address = true;
3921 trace.opts.sample_time = true;
3922 }
3923
3924 if (trace.opts.mmap_pages == UINT_MAX)
3925 mmap_pages_user_set = false;
3926
3927 if (trace.max_stack == UINT_MAX) {
3928 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
3929 max_stack_user_set = false;
3930 }
3931
3932 #ifdef HAVE_DWARF_UNWIND_SUPPORT
3933 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
3934 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
3935 }
3936 #endif
3937
3938 if (callchain_param.enabled) {
3939 if (!mmap_pages_user_set && geteuid() == 0)
3940 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
3941
3942 symbol_conf.use_callchain = true;
3943 }
3944
3945 if (trace.evlist->nr_entries > 0) {
3946 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
3947 if (evlist__set_syscall_tp_fields(trace.evlist)) {
3948 perror("failed to set syscalls:* tracepoint fields");
3949 goto out;
3950 }
3951 }
3952
3953 if (trace.sort_events) {
3954 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
3955 ordered_events__set_copy_on_queue(&trace.oe.data, true);
3956 }
3957
3958 /*
3959 * If we are augmenting syscalls, then combine what we put in the
3960 * __augmented_syscalls__ BPF map with what is in the
3961 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
3962 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
3963 *
3964 * We'll switch to look at two BPF maps, one for sys_enter and the
3965 * other for sys_exit when we start augmenting the sys_exit paths with
3966 * buffers that are being copied from kernel to userspace, think 'read'
3967 * syscall.
3968 */
3969 if (trace.syscalls.events.augmented) {
3970 evlist__for_each_entry(trace.evlist, evsel) {
3971 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
3972
3973 if (raw_syscalls_sys_exit) {
3974 trace.raw_augmented_syscalls = true;
3975 goto init_augmented_syscall_tp;
3976 }
3977
3978 if (trace.syscalls.events.augmented->priv == NULL &&
3979 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
3980 struct perf_evsel *augmented = trace.syscalls.events.augmented;
3981 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
3982 perf_evsel__init_augmented_syscall_tp_args(augmented))
3983 goto out;
3984 augmented->handler = trace__sys_enter;
3985 }
3986
3987 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
3988 struct syscall_tp *sc;
3989 init_augmented_syscall_tp:
3990 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
3991 goto out;
3992 sc = evsel->priv;
3993 /*
3994 * For now with BPF raw_augmented we hook into
3995 * raw_syscalls:sys_enter and there we get all
3996 * 6 syscall args plus the tracepoint common
3997 * fields and the syscall_nr (another long).
3998 * So we check if that is the case and if so
3999 * don't look after the sc->args_size but
4000 * always after the full raw_syscalls:sys_enter
4001 * payload, which is fixed.
4002 *
4003 * We'll revisit this later to pass
4004 * s->args_size to the BPF augmenter (now
4005 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
4006 * so that it copies only what we need for each
4007 * syscall, like what happens when we use
4008 * syscalls:sys_enter_NAME, so that we reduce
4009 * the kernel/userspace traffic to just what is
4010 * needed for each syscall.
4011 */
4012 if (trace.raw_augmented_syscalls)
4013 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
4014 perf_evsel__init_augmented_syscall_tp_ret(evsel);
4015 evsel->handler = trace__sys_exit;
4016 }
4017 }
4018 }
4019
4020 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
4021 return trace__record(&trace, argc-1, &argv[1]);
4022
4023 /* summary_only implies summary option, but don't overwrite summary if set */
4024 if (trace.summary_only)
4025 trace.summary = trace.summary_only;
4026
4027 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4028 trace.evlist->nr_entries == 0 /* Was --events used? */) {
4029 trace.trace_syscalls = true;
4030 }
4031
4032 if (output_name != NULL) {
4033 err = trace__open_output(&trace, output_name);
4034 if (err < 0) {
4035 perror("failed to create output file");
4036 goto out;
4037 }
4038 }
4039
4040 err = target__validate(&trace.opts.target);
4041 if (err) {
4042 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4043 fprintf(trace.output, "%s", bf);
4044 goto out_close;
4045 }
4046
4047 err = target__parse_uid(&trace.opts.target);
4048 if (err) {
4049 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4050 fprintf(trace.output, "%s", bf);
4051 goto out_close;
4052 }
4053
4054 if (!argc && target__none(&trace.opts.target))
4055 trace.opts.target.system_wide = true;
4056
4057 if (input_name)
4058 err = trace__replay(&trace);
4059 else
4060 err = trace__run(&trace, argc, argv);
4061
4062 out_close:
4063 if (output_name != NULL)
4064 fclose(trace.output);
4065 out:
4066 return err;
4067 }
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