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1 /*
2 * builtin-trace.c
3 *
4 * Builtin 'trace' command:
5 *
6 * Display a continuously updated trace of any workload, CPU, specific PID,
7 * system wide, etc. Default format is loosely strace like, but any other
8 * event may be specified using --event.
9 *
10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 *
12 * Initially based on the 'trace' prototype by Thomas Gleixner:
13 *
14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
15 */
16
17 #include "util/record.h"
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 "util/evswitch.h"
32 #include <subcmd/exec-cmd.h>
33 #include "util/machine.h"
34 #include "util/map.h"
35 #include "util/symbol.h"
36 #include "util/path.h"
37 #include "util/session.h"
38 #include "util/thread.h"
39 #include <subcmd/parse-options.h>
40 #include "util/strlist.h"
41 #include "util/intlist.h"
42 #include "util/thread_map.h"
43 #include "util/stat.h"
44 #include "util/util.h"
45 #include "trace/beauty/beauty.h"
46 #include "trace-event.h"
47 #include "util/parse-events.h"
48 #include "util/bpf-loader.h"
49 #include "callchain.h"
50 #include "print_binary.h"
51 #include "string2.h"
52 #include "syscalltbl.h"
53 #include "rb_resort.h"
54
55 #include <errno.h>
56 #include <inttypes.h>
57 #include <poll.h>
58 #include <signal.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <linux/err.h>
62 #include <linux/filter.h>
63 #include <linux/kernel.h>
64 #include <linux/random.h>
65 #include <linux/stringify.h>
66 #include <linux/time64.h>
67 #include <linux/zalloc.h>
68 #include <fcntl.h>
69 #include <sys/sysmacros.h>
70
71 #include <linux/ctype.h>
72
73 #ifndef O_CLOEXEC
74 # define O_CLOEXEC 02000000
75 #endif
76
77 #ifndef F_LINUX_SPECIFIC_BASE
78 # define F_LINUX_SPECIFIC_BASE 1024
79 #endif
80
81 struct trace {
82 struct perf_tool tool;
83 struct syscalltbl *sctbl;
84 struct {
85 struct syscall *table;
86 struct bpf_map *map;
87 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
88 struct bpf_map *sys_enter,
89 *sys_exit;
90 } prog_array;
91 struct {
92 struct evsel *sys_enter,
93 *sys_exit,
94 *augmented;
95 } events;
96 struct bpf_program *unaugmented_prog;
97 } syscalls;
98 struct {
99 struct bpf_map *map;
100 } dump;
101 struct record_opts opts;
102 struct evlist *evlist;
103 struct machine *host;
104 struct thread *current;
105 struct bpf_object *bpf_obj;
106 struct cgroup *cgroup;
107 u64 base_time;
108 FILE *output;
109 unsigned long nr_events;
110 unsigned long nr_events_printed;
111 unsigned long max_events;
112 struct evswitch evswitch;
113 struct strlist *ev_qualifier;
114 struct {
115 size_t nr;
116 int *entries;
117 } ev_qualifier_ids;
118 struct {
119 size_t nr;
120 pid_t *entries;
121 struct bpf_map *map;
122 } filter_pids;
123 double duration_filter;
124 double runtime_ms;
125 struct {
126 u64 vfs_getname,
127 proc_getname;
128 } stats;
129 unsigned int max_stack;
130 unsigned int min_stack;
131 int raw_augmented_syscalls_args_size;
132 bool raw_augmented_syscalls;
133 bool fd_path_disabled;
134 bool sort_events;
135 bool not_ev_qualifier;
136 bool live;
137 bool full_time;
138 bool sched;
139 bool multiple_threads;
140 bool summary;
141 bool summary_only;
142 bool failure_only;
143 bool show_comm;
144 bool print_sample;
145 bool show_tool_stats;
146 bool trace_syscalls;
147 bool kernel_syscallchains;
148 s16 args_alignment;
149 bool show_tstamp;
150 bool show_duration;
151 bool show_zeros;
152 bool show_arg_names;
153 bool show_string_prefix;
154 bool force;
155 bool vfs_getname;
156 int trace_pgfaults;
157 struct {
158 struct ordered_events data;
159 u64 last;
160 } oe;
161 };
162
163 struct tp_field {
164 int offset;
165 union {
166 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
167 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
168 };
169 };
170
171 #define TP_UINT_FIELD(bits) \
172 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
173 { \
174 u##bits value; \
175 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
176 return value; \
177 }
178
179 TP_UINT_FIELD(8);
180 TP_UINT_FIELD(16);
181 TP_UINT_FIELD(32);
182 TP_UINT_FIELD(64);
183
184 #define TP_UINT_FIELD__SWAPPED(bits) \
185 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
186 { \
187 u##bits value; \
188 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
189 return bswap_##bits(value);\
190 }
191
192 TP_UINT_FIELD__SWAPPED(16);
193 TP_UINT_FIELD__SWAPPED(32);
194 TP_UINT_FIELD__SWAPPED(64);
195
196 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
197 {
198 field->offset = offset;
199
200 switch (size) {
201 case 1:
202 field->integer = tp_field__u8;
203 break;
204 case 2:
205 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
206 break;
207 case 4:
208 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
209 break;
210 case 8:
211 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
212 break;
213 default:
214 return -1;
215 }
216
217 return 0;
218 }
219
220 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
221 {
222 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
223 }
224
225 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
226 {
227 return sample->raw_data + field->offset;
228 }
229
230 static int __tp_field__init_ptr(struct tp_field *field, int offset)
231 {
232 field->offset = offset;
233 field->pointer = tp_field__ptr;
234 return 0;
235 }
236
237 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
238 {
239 return __tp_field__init_ptr(field, format_field->offset);
240 }
241
242 struct syscall_tp {
243 struct tp_field id;
244 union {
245 struct tp_field args, ret;
246 };
247 };
248
249 static int perf_evsel__init_tp_uint_field(struct evsel *evsel,
250 struct tp_field *field,
251 const char *name)
252 {
253 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
254
255 if (format_field == NULL)
256 return -1;
257
258 return tp_field__init_uint(field, format_field, evsel->needs_swap);
259 }
260
261 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
262 ({ struct syscall_tp *sc = evsel->priv;\
263 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
264
265 static int perf_evsel__init_tp_ptr_field(struct evsel *evsel,
266 struct tp_field *field,
267 const char *name)
268 {
269 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
270
271 if (format_field == NULL)
272 return -1;
273
274 return tp_field__init_ptr(field, format_field);
275 }
276
277 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
278 ({ struct syscall_tp *sc = evsel->priv;\
279 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
280
281 static void evsel__delete_priv(struct evsel *evsel)
282 {
283 zfree(&evsel->priv);
284 evsel__delete(evsel);
285 }
286
287 static int perf_evsel__init_syscall_tp(struct evsel *evsel)
288 {
289 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
290
291 if (evsel->priv != NULL) {
292 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
293 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
294 goto out_delete;
295 return 0;
296 }
297
298 return -ENOMEM;
299 out_delete:
300 zfree(&evsel->priv);
301 return -ENOENT;
302 }
303
304 static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
305 {
306 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
307
308 if (evsel->priv != NULL) {
309 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
310 if (syscall_id == NULL)
311 syscall_id = perf_evsel__field(tp, "__syscall_nr");
312 if (syscall_id == NULL)
313 goto out_delete;
314 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
315 goto out_delete;
316
317 return 0;
318 }
319
320 return -ENOMEM;
321 out_delete:
322 zfree(&evsel->priv);
323 return -EINVAL;
324 }
325
326 static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
327 {
328 struct syscall_tp *sc = evsel->priv;
329
330 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
331 }
332
333 static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
334 {
335 struct syscall_tp *sc = evsel->priv;
336
337 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
338 }
339
340 static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
341 {
342 evsel->priv = malloc(sizeof(struct syscall_tp));
343 if (evsel->priv != NULL) {
344 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
345 goto out_delete;
346
347 evsel->handler = handler;
348 return 0;
349 }
350
351 return -ENOMEM;
352
353 out_delete:
354 zfree(&evsel->priv);
355 return -ENOENT;
356 }
357
358 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
359 {
360 struct evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
361
362 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
363 if (IS_ERR(evsel))
364 evsel = perf_evsel__newtp("syscalls", direction);
365
366 if (IS_ERR(evsel))
367 return NULL;
368
369 if (perf_evsel__init_raw_syscall_tp(evsel, handler))
370 goto out_delete;
371
372 return evsel;
373
374 out_delete:
375 evsel__delete_priv(evsel);
376 return NULL;
377 }
378
379 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
380 ({ struct syscall_tp *fields = evsel->priv; \
381 fields->name.integer(&fields->name, sample); })
382
383 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
384 ({ struct syscall_tp *fields = evsel->priv; \
385 fields->name.pointer(&fields->name, sample); })
386
387 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
388 {
389 int idx = val - sa->offset;
390
391 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
392 size_t printed = scnprintf(bf, size, intfmt, val);
393 if (show_prefix)
394 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
395 return printed;
396 }
397
398 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
399 }
400
401 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
402 const char *intfmt,
403 struct syscall_arg *arg)
404 {
405 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
406 }
407
408 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
409 struct syscall_arg *arg)
410 {
411 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
412 }
413
414 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
415
416 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
417 {
418 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
419 }
420
421 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
422 {
423 size_t printed;
424 int i;
425
426 for (i = 0; i < sas->nr_entries; ++i) {
427 struct strarray *sa = sas->entries[i];
428 int idx = val - sa->offset;
429
430 if (idx >= 0 && idx < sa->nr_entries) {
431 if (sa->entries[idx] == NULL)
432 break;
433 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
434 }
435 }
436
437 printed = scnprintf(bf, size, intfmt, val);
438 if (show_prefix)
439 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
440 return printed;
441 }
442
443 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
444 struct syscall_arg *arg)
445 {
446 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
447 }
448
449 #ifndef AT_FDCWD
450 #define AT_FDCWD -100
451 #endif
452
453 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
454 struct syscall_arg *arg)
455 {
456 int fd = arg->val;
457 const char *prefix = "AT_FD";
458
459 if (fd == AT_FDCWD)
460 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
461
462 return syscall_arg__scnprintf_fd(bf, size, arg);
463 }
464
465 #define SCA_FDAT syscall_arg__scnprintf_fd_at
466
467 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
468 struct syscall_arg *arg);
469
470 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
471
472 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
473 {
474 return scnprintf(bf, size, "%#lx", arg->val);
475 }
476
477 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
478 {
479 if (arg->val == 0)
480 return scnprintf(bf, size, "NULL");
481 return syscall_arg__scnprintf_hex(bf, size, arg);
482 }
483
484 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
485 {
486 return scnprintf(bf, size, "%d", arg->val);
487 }
488
489 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
490 {
491 return scnprintf(bf, size, "%ld", arg->val);
492 }
493
494 static const char *bpf_cmd[] = {
495 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
496 "MAP_GET_NEXT_KEY", "PROG_LOAD",
497 };
498 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
499
500 static const char *fsmount_flags[] = {
501 [1] = "CLOEXEC",
502 };
503 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
504
505 #include "trace/beauty/generated/fsconfig_arrays.c"
506
507 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
508
509 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
510 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
511
512 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
513 static DEFINE_STRARRAY(itimers, "ITIMER_");
514
515 static const char *keyctl_options[] = {
516 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
517 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
518 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
519 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
520 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
521 };
522 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
523
524 static const char *whences[] = { "SET", "CUR", "END",
525 #ifdef SEEK_DATA
526 "DATA",
527 #endif
528 #ifdef SEEK_HOLE
529 "HOLE",
530 #endif
531 };
532 static DEFINE_STRARRAY(whences, "SEEK_");
533
534 static const char *fcntl_cmds[] = {
535 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
536 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
537 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
538 "GETOWNER_UIDS",
539 };
540 static DEFINE_STRARRAY(fcntl_cmds, "F_");
541
542 static const char *fcntl_linux_specific_cmds[] = {
543 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
544 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
545 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
546 };
547
548 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
549
550 static struct strarray *fcntl_cmds_arrays[] = {
551 &strarray__fcntl_cmds,
552 &strarray__fcntl_linux_specific_cmds,
553 };
554
555 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
556
557 static const char *rlimit_resources[] = {
558 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
559 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
560 "RTTIME",
561 };
562 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
563
564 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
565 static DEFINE_STRARRAY(sighow, "SIG_");
566
567 static const char *clockid[] = {
568 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
569 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
570 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
571 };
572 static DEFINE_STRARRAY(clockid, "CLOCK_");
573
574 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
575 struct syscall_arg *arg)
576 {
577 bool show_prefix = arg->show_string_prefix;
578 const char *suffix = "_OK";
579 size_t printed = 0;
580 int mode = arg->val;
581
582 if (mode == F_OK) /* 0 */
583 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
584 #define P_MODE(n) \
585 if (mode & n##_OK) { \
586 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
587 mode &= ~n##_OK; \
588 }
589
590 P_MODE(R);
591 P_MODE(W);
592 P_MODE(X);
593 #undef P_MODE
594
595 if (mode)
596 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
597
598 return printed;
599 }
600
601 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
602
603 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
604 struct syscall_arg *arg);
605
606 #define SCA_FILENAME syscall_arg__scnprintf_filename
607
608 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
609 struct syscall_arg *arg)
610 {
611 bool show_prefix = arg->show_string_prefix;
612 const char *prefix = "O_";
613 int printed = 0, flags = arg->val;
614
615 #define P_FLAG(n) \
616 if (flags & O_##n) { \
617 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
618 flags &= ~O_##n; \
619 }
620
621 P_FLAG(CLOEXEC);
622 P_FLAG(NONBLOCK);
623 #undef P_FLAG
624
625 if (flags)
626 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
627
628 return printed;
629 }
630
631 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
632
633 #ifndef GRND_NONBLOCK
634 #define GRND_NONBLOCK 0x0001
635 #endif
636 #ifndef GRND_RANDOM
637 #define GRND_RANDOM 0x0002
638 #endif
639
640 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
641 struct syscall_arg *arg)
642 {
643 bool show_prefix = arg->show_string_prefix;
644 const char *prefix = "GRND_";
645 int printed = 0, flags = arg->val;
646
647 #define P_FLAG(n) \
648 if (flags & GRND_##n) { \
649 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
650 flags &= ~GRND_##n; \
651 }
652
653 P_FLAG(RANDOM);
654 P_FLAG(NONBLOCK);
655 #undef P_FLAG
656
657 if (flags)
658 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
659
660 return printed;
661 }
662
663 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
664
665 #define STRARRAY(name, array) \
666 { .scnprintf = SCA_STRARRAY, \
667 .parm = &strarray__##array, }
668
669 #define STRARRAY_FLAGS(name, array) \
670 { .scnprintf = SCA_STRARRAY_FLAGS, \
671 .parm = &strarray__##array, }
672
673 #include "trace/beauty/arch_errno_names.c"
674 #include "trace/beauty/eventfd.c"
675 #include "trace/beauty/futex_op.c"
676 #include "trace/beauty/futex_val3.c"
677 #include "trace/beauty/mmap.c"
678 #include "trace/beauty/mode_t.c"
679 #include "trace/beauty/msg_flags.c"
680 #include "trace/beauty/open_flags.c"
681 #include "trace/beauty/perf_event_open.c"
682 #include "trace/beauty/pid.c"
683 #include "trace/beauty/sched_policy.c"
684 #include "trace/beauty/seccomp.c"
685 #include "trace/beauty/signum.c"
686 #include "trace/beauty/socket_type.c"
687 #include "trace/beauty/waitid_options.c"
688
689 struct syscall_arg_fmt {
690 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
691 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
692 void *parm;
693 const char *name;
694 bool show_zero;
695 };
696
697 static struct syscall_fmt {
698 const char *name;
699 const char *alias;
700 struct {
701 const char *sys_enter,
702 *sys_exit;
703 } bpf_prog_name;
704 struct syscall_arg_fmt arg[6];
705 u8 nr_args;
706 bool errpid;
707 bool timeout;
708 bool hexret;
709 } syscall_fmts[] = {
710 { .name = "access",
711 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
712 { .name = "arch_prctl",
713 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
714 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
715 { .name = "bind",
716 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
717 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
718 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
719 { .name = "bpf",
720 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
721 { .name = "brk", .hexret = true,
722 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
723 { .name = "clock_gettime",
724 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
725 { .name = "clone", .errpid = true, .nr_args = 5,
726 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
727 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
728 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
729 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
730 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
731 { .name = "close",
732 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
733 { .name = "connect",
734 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
735 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
736 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
737 { .name = "epoll_ctl",
738 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
739 { .name = "eventfd2",
740 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
741 { .name = "fchmodat",
742 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
743 { .name = "fchownat",
744 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
745 { .name = "fcntl",
746 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
747 .parm = &strarrays__fcntl_cmds_arrays,
748 .show_zero = true, },
749 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
750 { .name = "flock",
751 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
752 { .name = "fsconfig",
753 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
754 { .name = "fsmount",
755 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
756 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
757 { .name = "fspick",
758 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
759 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
760 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
761 { .name = "fstat", .alias = "newfstat", },
762 { .name = "fstatat", .alias = "newfstatat", },
763 { .name = "futex",
764 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
765 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
766 { .name = "futimesat",
767 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
768 { .name = "getitimer",
769 .arg = { [0] = STRARRAY(which, itimers), }, },
770 { .name = "getpid", .errpid = true, },
771 { .name = "getpgid", .errpid = true, },
772 { .name = "getppid", .errpid = true, },
773 { .name = "getrandom",
774 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
775 { .name = "getrlimit",
776 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
777 { .name = "gettid", .errpid = true, },
778 { .name = "ioctl",
779 .arg = {
780 #if defined(__i386__) || defined(__x86_64__)
781 /*
782 * FIXME: Make this available to all arches.
783 */
784 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
785 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
786 #else
787 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
788 #endif
789 { .name = "kcmp", .nr_args = 5,
790 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
791 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
792 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
793 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
794 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
795 { .name = "keyctl",
796 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
797 { .name = "kill",
798 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
799 { .name = "linkat",
800 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
801 { .name = "lseek",
802 .arg = { [2] = STRARRAY(whence, whences), }, },
803 { .name = "lstat", .alias = "newlstat", },
804 { .name = "madvise",
805 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
806 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
807 { .name = "mkdirat",
808 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
809 { .name = "mknodat",
810 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
811 { .name = "mmap", .hexret = true,
812 /* The standard mmap maps to old_mmap on s390x */
813 #if defined(__s390x__)
814 .alias = "old_mmap",
815 #endif
816 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
817 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ },
818 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
819 { .name = "mount",
820 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
821 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
822 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
823 { .name = "move_mount",
824 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
825 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
826 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
827 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
828 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
829 { .name = "mprotect",
830 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
831 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
832 { .name = "mq_unlink",
833 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
834 { .name = "mremap", .hexret = true,
835 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
836 { .name = "name_to_handle_at",
837 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
838 { .name = "newfstatat",
839 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
840 { .name = "open",
841 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
842 { .name = "open_by_handle_at",
843 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
844 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
845 { .name = "openat",
846 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
847 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
848 { .name = "perf_event_open",
849 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
850 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
851 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
852 { .name = "pipe2",
853 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
854 { .name = "pkey_alloc",
855 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
856 { .name = "pkey_free",
857 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
858 { .name = "pkey_mprotect",
859 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
860 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
861 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
862 { .name = "poll", .timeout = true, },
863 { .name = "ppoll", .timeout = true, },
864 { .name = "prctl",
865 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
866 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
867 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
868 { .name = "pread", .alias = "pread64", },
869 { .name = "preadv", .alias = "pread", },
870 { .name = "prlimit64",
871 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
872 { .name = "pwrite", .alias = "pwrite64", },
873 { .name = "readlinkat",
874 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
875 { .name = "recvfrom",
876 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
877 { .name = "recvmmsg",
878 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
879 { .name = "recvmsg",
880 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
881 { .name = "renameat",
882 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
883 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
884 { .name = "renameat2",
885 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
886 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
887 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
888 { .name = "rt_sigaction",
889 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
890 { .name = "rt_sigprocmask",
891 .arg = { [0] = STRARRAY(how, sighow), }, },
892 { .name = "rt_sigqueueinfo",
893 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
894 { .name = "rt_tgsigqueueinfo",
895 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
896 { .name = "sched_setscheduler",
897 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
898 { .name = "seccomp",
899 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
900 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
901 { .name = "select", .timeout = true, },
902 { .name = "sendfile", .alias = "sendfile64", },
903 { .name = "sendmmsg",
904 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
905 { .name = "sendmsg",
906 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
907 { .name = "sendto",
908 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
909 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
910 { .name = "set_tid_address", .errpid = true, },
911 { .name = "setitimer",
912 .arg = { [0] = STRARRAY(which, itimers), }, },
913 { .name = "setrlimit",
914 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
915 { .name = "socket",
916 .arg = { [0] = STRARRAY(family, socket_families),
917 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
918 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
919 { .name = "socketpair",
920 .arg = { [0] = STRARRAY(family, socket_families),
921 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
922 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
923 { .name = "stat", .alias = "newstat", },
924 { .name = "statx",
925 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
926 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
927 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
928 { .name = "swapoff",
929 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
930 { .name = "swapon",
931 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
932 { .name = "symlinkat",
933 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
934 { .name = "sync_file_range",
935 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
936 { .name = "tgkill",
937 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
938 { .name = "tkill",
939 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
940 { .name = "umount2", .alias = "umount",
941 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
942 { .name = "uname", .alias = "newuname", },
943 { .name = "unlinkat",
944 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
945 { .name = "utimensat",
946 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
947 { .name = "wait4", .errpid = true,
948 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
949 { .name = "waitid", .errpid = true,
950 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
951 };
952
953 static int syscall_fmt__cmp(const void *name, const void *fmtp)
954 {
955 const struct syscall_fmt *fmt = fmtp;
956 return strcmp(name, fmt->name);
957 }
958
959 static struct syscall_fmt *syscall_fmt__find(const char *name)
960 {
961 const int nmemb = ARRAY_SIZE(syscall_fmts);
962 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
963 }
964
965 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
966 {
967 int i, nmemb = ARRAY_SIZE(syscall_fmts);
968
969 for (i = 0; i < nmemb; ++i) {
970 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0)
971 return &syscall_fmts[i];
972 }
973
974 return NULL;
975 }
976
977 /*
978 * is_exit: is this "exit" or "exit_group"?
979 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
980 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
981 * nonexistent: Just a hole in the syscall table, syscall id not allocated
982 */
983 struct syscall {
984 struct tep_event *tp_format;
985 int nr_args;
986 int args_size;
987 struct {
988 struct bpf_program *sys_enter,
989 *sys_exit;
990 } bpf_prog;
991 bool is_exit;
992 bool is_open;
993 bool nonexistent;
994 struct tep_format_field *args;
995 const char *name;
996 struct syscall_fmt *fmt;
997 struct syscall_arg_fmt *arg_fmt;
998 };
999
1000 /*
1001 * Must match what is in the BPF program:
1002 *
1003 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1004 */
1005 struct bpf_map_syscall_entry {
1006 bool enabled;
1007 u16 string_args_len[6];
1008 };
1009
1010 /*
1011 * We need to have this 'calculated' boolean because in some cases we really
1012 * don't know what is the duration of a syscall, for instance, when we start
1013 * a session and some threads are waiting for a syscall to finish, say 'poll',
1014 * in which case all we can do is to print "( ? ) for duration and for the
1015 * start timestamp.
1016 */
1017 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1018 {
1019 double duration = (double)t / NSEC_PER_MSEC;
1020 size_t printed = fprintf(fp, "(");
1021
1022 if (!calculated)
1023 printed += fprintf(fp, " ");
1024 else if (duration >= 1.0)
1025 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1026 else if (duration >= 0.01)
1027 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1028 else
1029 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1030 return printed + fprintf(fp, "): ");
1031 }
1032
1033 /**
1034 * filename.ptr: The filename char pointer that will be vfs_getname'd
1035 * filename.entry_str_pos: Where to insert the string translated from
1036 * filename.ptr by the vfs_getname tracepoint/kprobe.
1037 * ret_scnprintf: syscall args may set this to a different syscall return
1038 * formatter, for instance, fcntl may return fds, file flags, etc.
1039 */
1040 struct thread_trace {
1041 u64 entry_time;
1042 bool entry_pending;
1043 unsigned long nr_events;
1044 unsigned long pfmaj, pfmin;
1045 char *entry_str;
1046 double runtime_ms;
1047 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1048 struct {
1049 unsigned long ptr;
1050 short int entry_str_pos;
1051 bool pending_open;
1052 unsigned int namelen;
1053 char *name;
1054 } filename;
1055 struct {
1056 int max;
1057 struct file *table;
1058 } files;
1059
1060 struct intlist *syscall_stats;
1061 };
1062
1063 static struct thread_trace *thread_trace__new(void)
1064 {
1065 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1066
1067 if (ttrace) {
1068 ttrace->files.max = -1;
1069 ttrace->syscall_stats = intlist__new(NULL);
1070 }
1071
1072 return ttrace;
1073 }
1074
1075 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1076 {
1077 struct thread_trace *ttrace;
1078
1079 if (thread == NULL)
1080 goto fail;
1081
1082 if (thread__priv(thread) == NULL)
1083 thread__set_priv(thread, thread_trace__new());
1084
1085 if (thread__priv(thread) == NULL)
1086 goto fail;
1087
1088 ttrace = thread__priv(thread);
1089 ++ttrace->nr_events;
1090
1091 return ttrace;
1092 fail:
1093 color_fprintf(fp, PERF_COLOR_RED,
1094 "WARNING: not enough memory, dropping samples!\n");
1095 return NULL;
1096 }
1097
1098
1099 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1100 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1101 {
1102 struct thread_trace *ttrace = thread__priv(arg->thread);
1103
1104 ttrace->ret_scnprintf = ret_scnprintf;
1105 }
1106
1107 #define TRACE_PFMAJ (1 << 0)
1108 #define TRACE_PFMIN (1 << 1)
1109
1110 static const size_t trace__entry_str_size = 2048;
1111
1112 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1113 {
1114 if (fd < 0)
1115 return NULL;
1116
1117 if (fd > ttrace->files.max) {
1118 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1119
1120 if (nfiles == NULL)
1121 return NULL;
1122
1123 if (ttrace->files.max != -1) {
1124 memset(nfiles + ttrace->files.max + 1, 0,
1125 (fd - ttrace->files.max) * sizeof(struct file));
1126 } else {
1127 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1128 }
1129
1130 ttrace->files.table = nfiles;
1131 ttrace->files.max = fd;
1132 }
1133
1134 return ttrace->files.table + fd;
1135 }
1136
1137 struct file *thread__files_entry(struct thread *thread, int fd)
1138 {
1139 return thread_trace__files_entry(thread__priv(thread), fd);
1140 }
1141
1142 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1143 {
1144 struct thread_trace *ttrace = thread__priv(thread);
1145 struct file *file = thread_trace__files_entry(ttrace, fd);
1146
1147 if (file != NULL) {
1148 struct stat st;
1149 if (stat(pathname, &st) == 0)
1150 file->dev_maj = major(st.st_rdev);
1151 file->pathname = strdup(pathname);
1152 if (file->pathname)
1153 return 0;
1154 }
1155
1156 return -1;
1157 }
1158
1159 static int thread__read_fd_path(struct thread *thread, int fd)
1160 {
1161 char linkname[PATH_MAX], pathname[PATH_MAX];
1162 struct stat st;
1163 int ret;
1164
1165 if (thread->pid_ == thread->tid) {
1166 scnprintf(linkname, sizeof(linkname),
1167 "/proc/%d/fd/%d", thread->pid_, fd);
1168 } else {
1169 scnprintf(linkname, sizeof(linkname),
1170 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1171 }
1172
1173 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1174 return -1;
1175
1176 ret = readlink(linkname, pathname, sizeof(pathname));
1177
1178 if (ret < 0 || ret > st.st_size)
1179 return -1;
1180
1181 pathname[ret] = '\0';
1182 return trace__set_fd_pathname(thread, fd, pathname);
1183 }
1184
1185 static const char *thread__fd_path(struct thread *thread, int fd,
1186 struct trace *trace)
1187 {
1188 struct thread_trace *ttrace = thread__priv(thread);
1189
1190 if (ttrace == NULL || trace->fd_path_disabled)
1191 return NULL;
1192
1193 if (fd < 0)
1194 return NULL;
1195
1196 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1197 if (!trace->live)
1198 return NULL;
1199 ++trace->stats.proc_getname;
1200 if (thread__read_fd_path(thread, fd))
1201 return NULL;
1202 }
1203
1204 return ttrace->files.table[fd].pathname;
1205 }
1206
1207 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1208 {
1209 int fd = arg->val;
1210 size_t printed = scnprintf(bf, size, "%d", fd);
1211 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1212
1213 if (path)
1214 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1215
1216 return printed;
1217 }
1218
1219 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1220 {
1221 size_t printed = scnprintf(bf, size, "%d", fd);
1222 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1223
1224 if (thread) {
1225 const char *path = thread__fd_path(thread, fd, trace);
1226
1227 if (path)
1228 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1229
1230 thread__put(thread);
1231 }
1232
1233 return printed;
1234 }
1235
1236 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1237 struct syscall_arg *arg)
1238 {
1239 int fd = arg->val;
1240 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1241 struct thread_trace *ttrace = thread__priv(arg->thread);
1242
1243 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1244 zfree(&ttrace->files.table[fd].pathname);
1245
1246 return printed;
1247 }
1248
1249 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1250 unsigned long ptr)
1251 {
1252 struct thread_trace *ttrace = thread__priv(thread);
1253
1254 ttrace->filename.ptr = ptr;
1255 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1256 }
1257
1258 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1259 {
1260 struct augmented_arg *augmented_arg = arg->augmented.args;
1261 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1262 /*
1263 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1264 * we would have two strings, each prefixed by its size.
1265 */
1266 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1267
1268 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1269 arg->augmented.size -= consumed;
1270
1271 return printed;
1272 }
1273
1274 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1275 struct syscall_arg *arg)
1276 {
1277 unsigned long ptr = arg->val;
1278
1279 if (arg->augmented.args)
1280 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1281
1282 if (!arg->trace->vfs_getname)
1283 return scnprintf(bf, size, "%#x", ptr);
1284
1285 thread__set_filename_pos(arg->thread, bf, ptr);
1286 return 0;
1287 }
1288
1289 static bool trace__filter_duration(struct trace *trace, double t)
1290 {
1291 return t < (trace->duration_filter * NSEC_PER_MSEC);
1292 }
1293
1294 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1295 {
1296 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1297
1298 return fprintf(fp, "%10.3f ", ts);
1299 }
1300
1301 /*
1302 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1303 * using ttrace->entry_time for a thread that receives a sys_exit without
1304 * first having received a sys_enter ("poll" issued before tracing session
1305 * starts, lost sys_enter exit due to ring buffer overflow).
1306 */
1307 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1308 {
1309 if (tstamp > 0)
1310 return __trace__fprintf_tstamp(trace, tstamp, fp);
1311
1312 return fprintf(fp, " ? ");
1313 }
1314
1315 static bool done = false;
1316 static bool interrupted = false;
1317
1318 static void sig_handler(int sig)
1319 {
1320 done = true;
1321 interrupted = sig == SIGINT;
1322 }
1323
1324 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1325 {
1326 size_t printed = 0;
1327
1328 if (trace->multiple_threads) {
1329 if (trace->show_comm)
1330 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1331 printed += fprintf(fp, "%d ", thread->tid);
1332 }
1333
1334 return printed;
1335 }
1336
1337 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1338 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1339 {
1340 size_t printed = 0;
1341
1342 if (trace->show_tstamp)
1343 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1344 if (trace->show_duration)
1345 printed += fprintf_duration(duration, duration_calculated, fp);
1346 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1347 }
1348
1349 static int trace__process_event(struct trace *trace, struct machine *machine,
1350 union perf_event *event, struct perf_sample *sample)
1351 {
1352 int ret = 0;
1353
1354 switch (event->header.type) {
1355 case PERF_RECORD_LOST:
1356 color_fprintf(trace->output, PERF_COLOR_RED,
1357 "LOST %" PRIu64 " events!\n", event->lost.lost);
1358 ret = machine__process_lost_event(machine, event, sample);
1359 break;
1360 default:
1361 ret = machine__process_event(machine, event, sample);
1362 break;
1363 }
1364
1365 return ret;
1366 }
1367
1368 static int trace__tool_process(struct perf_tool *tool,
1369 union perf_event *event,
1370 struct perf_sample *sample,
1371 struct machine *machine)
1372 {
1373 struct trace *trace = container_of(tool, struct trace, tool);
1374 return trace__process_event(trace, machine, event, sample);
1375 }
1376
1377 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1378 {
1379 struct machine *machine = vmachine;
1380
1381 if (machine->kptr_restrict_warned)
1382 return NULL;
1383
1384 if (symbol_conf.kptr_restrict) {
1385 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1386 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1387 "Kernel samples will not be resolved.\n");
1388 machine->kptr_restrict_warned = true;
1389 return NULL;
1390 }
1391
1392 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1393 }
1394
1395 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1396 {
1397 int err = symbol__init(NULL);
1398
1399 if (err)
1400 return err;
1401
1402 trace->host = machine__new_host();
1403 if (trace->host == NULL)
1404 return -ENOMEM;
1405
1406 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1407 if (err < 0)
1408 goto out;
1409
1410 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1411 evlist->core.threads, trace__tool_process, false,
1412 1);
1413 out:
1414 if (err)
1415 symbol__exit();
1416
1417 return err;
1418 }
1419
1420 static void trace__symbols__exit(struct trace *trace)
1421 {
1422 machine__exit(trace->host);
1423 trace->host = NULL;
1424
1425 symbol__exit();
1426 }
1427
1428 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1429 {
1430 int idx;
1431
1432 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1433 nr_args = sc->fmt->nr_args;
1434
1435 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1436 if (sc->arg_fmt == NULL)
1437 return -1;
1438
1439 for (idx = 0; idx < nr_args; ++idx) {
1440 if (sc->fmt)
1441 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1442 }
1443
1444 sc->nr_args = nr_args;
1445 return 0;
1446 }
1447
1448 static int syscall__set_arg_fmts(struct syscall *sc)
1449 {
1450 struct tep_format_field *field, *last_field = NULL;
1451 int idx = 0, len;
1452
1453 for (field = sc->args; field; field = field->next, ++idx) {
1454 last_field = field;
1455
1456 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1457 continue;
1458
1459 len = strlen(field->name);
1460
1461 if (strcmp(field->type, "const char *") == 0 &&
1462 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1463 strstr(field->name, "path") != NULL))
1464 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1465 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1466 sc->arg_fmt[idx].scnprintf = SCA_PTR;
1467 else if (strcmp(field->type, "pid_t") == 0)
1468 sc->arg_fmt[idx].scnprintf = SCA_PID;
1469 else if (strcmp(field->type, "umode_t") == 0)
1470 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1471 else if ((strcmp(field->type, "int") == 0 ||
1472 strcmp(field->type, "unsigned int") == 0 ||
1473 strcmp(field->type, "long") == 0) &&
1474 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1475 /*
1476 * /sys/kernel/tracing/events/syscalls/sys_enter*
1477 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1478 * 65 int
1479 * 23 unsigned int
1480 * 7 unsigned long
1481 */
1482 sc->arg_fmt[idx].scnprintf = SCA_FD;
1483 }
1484 }
1485
1486 if (last_field)
1487 sc->args_size = last_field->offset + last_field->size;
1488
1489 return 0;
1490 }
1491
1492 static int trace__read_syscall_info(struct trace *trace, int id)
1493 {
1494 char tp_name[128];
1495 struct syscall *sc;
1496 const char *name = syscalltbl__name(trace->sctbl, id);
1497
1498 if (trace->syscalls.table == NULL) {
1499 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1500 if (trace->syscalls.table == NULL)
1501 return -ENOMEM;
1502 }
1503
1504 sc = trace->syscalls.table + id;
1505 if (sc->nonexistent)
1506 return 0;
1507
1508 if (name == NULL) {
1509 sc->nonexistent = true;
1510 return 0;
1511 }
1512
1513 sc->name = name;
1514 sc->fmt = syscall_fmt__find(sc->name);
1515
1516 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1517 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1518
1519 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1520 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1521 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1522 }
1523
1524 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1525 return -ENOMEM;
1526
1527 if (IS_ERR(sc->tp_format))
1528 return PTR_ERR(sc->tp_format);
1529
1530 sc->args = sc->tp_format->format.fields;
1531 /*
1532 * We need to check and discard the first variable '__syscall_nr'
1533 * or 'nr' that mean the syscall number. It is needless here.
1534 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1535 */
1536 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1537 sc->args = sc->args->next;
1538 --sc->nr_args;
1539 }
1540
1541 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1542 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1543
1544 return syscall__set_arg_fmts(sc);
1545 }
1546
1547 static int intcmp(const void *a, const void *b)
1548 {
1549 const int *one = a, *another = b;
1550
1551 return *one - *another;
1552 }
1553
1554 static int trace__validate_ev_qualifier(struct trace *trace)
1555 {
1556 int err = 0;
1557 bool printed_invalid_prefix = false;
1558 struct str_node *pos;
1559 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1560
1561 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1562 sizeof(trace->ev_qualifier_ids.entries[0]));
1563
1564 if (trace->ev_qualifier_ids.entries == NULL) {
1565 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1566 trace->output);
1567 err = -EINVAL;
1568 goto out;
1569 }
1570
1571 strlist__for_each_entry(pos, trace->ev_qualifier) {
1572 const char *sc = pos->s;
1573 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1574
1575 if (id < 0) {
1576 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1577 if (id >= 0)
1578 goto matches;
1579
1580 if (!printed_invalid_prefix) {
1581 pr_debug("Skipping unknown syscalls: ");
1582 printed_invalid_prefix = true;
1583 } else {
1584 pr_debug(", ");
1585 }
1586
1587 pr_debug("%s", sc);
1588 continue;
1589 }
1590 matches:
1591 trace->ev_qualifier_ids.entries[nr_used++] = id;
1592 if (match_next == -1)
1593 continue;
1594
1595 while (1) {
1596 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1597 if (id < 0)
1598 break;
1599 if (nr_allocated == nr_used) {
1600 void *entries;
1601
1602 nr_allocated += 8;
1603 entries = realloc(trace->ev_qualifier_ids.entries,
1604 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1605 if (entries == NULL) {
1606 err = -ENOMEM;
1607 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1608 goto out_free;
1609 }
1610 trace->ev_qualifier_ids.entries = entries;
1611 }
1612 trace->ev_qualifier_ids.entries[nr_used++] = id;
1613 }
1614 }
1615
1616 trace->ev_qualifier_ids.nr = nr_used;
1617 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1618 out:
1619 if (printed_invalid_prefix)
1620 pr_debug("\n");
1621 return err;
1622 out_free:
1623 zfree(&trace->ev_qualifier_ids.entries);
1624 trace->ev_qualifier_ids.nr = 0;
1625 goto out;
1626 }
1627
1628 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1629 {
1630 bool in_ev_qualifier;
1631
1632 if (trace->ev_qualifier_ids.nr == 0)
1633 return true;
1634
1635 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1636 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1637
1638 if (in_ev_qualifier)
1639 return !trace->not_ev_qualifier;
1640
1641 return trace->not_ev_qualifier;
1642 }
1643
1644 /*
1645 * args is to be interpreted as a series of longs but we need to handle
1646 * 8-byte unaligned accesses. args points to raw_data within the event
1647 * and raw_data is guaranteed to be 8-byte unaligned because it is
1648 * preceded by raw_size which is a u32. So we need to copy args to a temp
1649 * variable to read it. Most notably this avoids extended load instructions
1650 * on unaligned addresses
1651 */
1652 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1653 {
1654 unsigned long val;
1655 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1656
1657 memcpy(&val, p, sizeof(val));
1658 return val;
1659 }
1660
1661 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1662 struct syscall_arg *arg)
1663 {
1664 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1665 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1666
1667 return scnprintf(bf, size, "arg%d: ", arg->idx);
1668 }
1669
1670 /*
1671 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1672 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1673 * in tools/perf/trace/beauty/mount_flags.c
1674 */
1675 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val)
1676 {
1677 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val)
1678 return sc->arg_fmt[arg->idx].mask_val(arg, val);
1679
1680 return val;
1681 }
1682
1683 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1684 struct syscall_arg *arg, unsigned long val)
1685 {
1686 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1687 arg->val = val;
1688 if (sc->arg_fmt[arg->idx].parm)
1689 arg->parm = sc->arg_fmt[arg->idx].parm;
1690 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1691 }
1692 return scnprintf(bf, size, "%ld", val);
1693 }
1694
1695 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1696 unsigned char *args, void *augmented_args, int augmented_args_size,
1697 struct trace *trace, struct thread *thread)
1698 {
1699 size_t printed = 0;
1700 unsigned long val;
1701 u8 bit = 1;
1702 struct syscall_arg arg = {
1703 .args = args,
1704 .augmented = {
1705 .size = augmented_args_size,
1706 .args = augmented_args,
1707 },
1708 .idx = 0,
1709 .mask = 0,
1710 .trace = trace,
1711 .thread = thread,
1712 .show_string_prefix = trace->show_string_prefix,
1713 };
1714 struct thread_trace *ttrace = thread__priv(thread);
1715
1716 /*
1717 * Things like fcntl will set this in its 'cmd' formatter to pick the
1718 * right formatter for the return value (an fd? file flags?), which is
1719 * not needed for syscalls that always return a given type, say an fd.
1720 */
1721 ttrace->ret_scnprintf = NULL;
1722
1723 if (sc->args != NULL) {
1724 struct tep_format_field *field;
1725
1726 for (field = sc->args; field;
1727 field = field->next, ++arg.idx, bit <<= 1) {
1728 if (arg.mask & bit)
1729 continue;
1730
1731 val = syscall_arg__val(&arg, arg.idx);
1732 /*
1733 * Some syscall args need some mask, most don't and
1734 * return val untouched.
1735 */
1736 val = syscall__mask_val(sc, &arg, val);
1737
1738 /*
1739 * Suppress this argument if its value is zero and
1740 * and we don't have a string associated in an
1741 * strarray for it.
1742 */
1743 if (val == 0 &&
1744 !trace->show_zeros &&
1745 !(sc->arg_fmt &&
1746 (sc->arg_fmt[arg.idx].show_zero ||
1747 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1748 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1749 sc->arg_fmt[arg.idx].parm))
1750 continue;
1751
1752 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
1753
1754 if (trace->show_arg_names)
1755 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
1756
1757 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1758 }
1759 } else if (IS_ERR(sc->tp_format)) {
1760 /*
1761 * If we managed to read the tracepoint /format file, then we
1762 * may end up not having any args, like with gettid(), so only
1763 * print the raw args when we didn't manage to read it.
1764 */
1765 while (arg.idx < sc->nr_args) {
1766 if (arg.mask & bit)
1767 goto next_arg;
1768 val = syscall_arg__val(&arg, arg.idx);
1769 if (printed)
1770 printed += scnprintf(bf + printed, size - printed, ", ");
1771 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1772 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1773 next_arg:
1774 ++arg.idx;
1775 bit <<= 1;
1776 }
1777 }
1778
1779 return printed;
1780 }
1781
1782 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
1783 union perf_event *event,
1784 struct perf_sample *sample);
1785
1786 static struct syscall *trace__syscall_info(struct trace *trace,
1787 struct evsel *evsel, int id)
1788 {
1789 int err = 0;
1790
1791 if (id < 0) {
1792
1793 /*
1794 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1795 * before that, leaving at a higher verbosity level till that is
1796 * explained. Reproduced with plain ftrace with:
1797 *
1798 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1799 * grep "NR -1 " /t/trace_pipe
1800 *
1801 * After generating some load on the machine.
1802 */
1803 if (verbose > 1) {
1804 static u64 n;
1805 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1806 id, perf_evsel__name(evsel), ++n);
1807 }
1808 return NULL;
1809 }
1810
1811 err = -EINVAL;
1812
1813 if (id > trace->sctbl->syscalls.max_id)
1814 goto out_cant_read;
1815
1816 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
1817 (err = trace__read_syscall_info(trace, id)) != 0)
1818 goto out_cant_read;
1819
1820 if (trace->syscalls.table[id].name == NULL) {
1821 if (trace->syscalls.table[id].nonexistent)
1822 return NULL;
1823 goto out_cant_read;
1824 }
1825
1826 return &trace->syscalls.table[id];
1827
1828 out_cant_read:
1829 if (verbose > 0) {
1830 char sbuf[STRERR_BUFSIZE];
1831 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
1832 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
1833 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1834 fputs(" information\n", trace->output);
1835 }
1836 return NULL;
1837 }
1838
1839 static void thread__update_stats(struct thread_trace *ttrace,
1840 int id, struct perf_sample *sample)
1841 {
1842 struct int_node *inode;
1843 struct stats *stats;
1844 u64 duration = 0;
1845
1846 inode = intlist__findnew(ttrace->syscall_stats, id);
1847 if (inode == NULL)
1848 return;
1849
1850 stats = inode->priv;
1851 if (stats == NULL) {
1852 stats = malloc(sizeof(struct stats));
1853 if (stats == NULL)
1854 return;
1855 init_stats(stats);
1856 inode->priv = stats;
1857 }
1858
1859 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1860 duration = sample->time - ttrace->entry_time;
1861
1862 update_stats(stats, duration);
1863 }
1864
1865 static int trace__printf_interrupted_entry(struct trace *trace)
1866 {
1867 struct thread_trace *ttrace;
1868 size_t printed;
1869 int len;
1870
1871 if (trace->failure_only || trace->current == NULL)
1872 return 0;
1873
1874 ttrace = thread__priv(trace->current);
1875
1876 if (!ttrace->entry_pending)
1877 return 0;
1878
1879 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1880 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
1881
1882 if (len < trace->args_alignment - 4)
1883 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
1884
1885 printed += fprintf(trace->output, " ...\n");
1886
1887 ttrace->entry_pending = false;
1888 ++trace->nr_events_printed;
1889
1890 return printed;
1891 }
1892
1893 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
1894 struct perf_sample *sample, struct thread *thread)
1895 {
1896 int printed = 0;
1897
1898 if (trace->print_sample) {
1899 double ts = (double)sample->time / NSEC_PER_MSEC;
1900
1901 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1902 perf_evsel__name(evsel), ts,
1903 thread__comm_str(thread),
1904 sample->pid, sample->tid, sample->cpu);
1905 }
1906
1907 return printed;
1908 }
1909
1910 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
1911 {
1912 void *augmented_args = NULL;
1913 /*
1914 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
1915 * and there we get all 6 syscall args plus the tracepoint common fields
1916 * that gets calculated at the start and the syscall_nr (another long).
1917 * So we check if that is the case and if so don't look after the
1918 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
1919 * which is fixed.
1920 *
1921 * We'll revisit this later to pass s->args_size to the BPF augmenter
1922 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
1923 * copies only what we need for each syscall, like what happens when we
1924 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
1925 * traffic to just what is needed for each syscall.
1926 */
1927 int args_size = raw_augmented_args_size ?: sc->args_size;
1928
1929 *augmented_args_size = sample->raw_size - args_size;
1930 if (*augmented_args_size > 0)
1931 augmented_args = sample->raw_data + args_size;
1932
1933 return augmented_args;
1934 }
1935
1936 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
1937 union perf_event *event __maybe_unused,
1938 struct perf_sample *sample)
1939 {
1940 char *msg;
1941 void *args;
1942 int printed = 0;
1943 struct thread *thread;
1944 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1945 int augmented_args_size = 0;
1946 void *augmented_args = NULL;
1947 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1948 struct thread_trace *ttrace;
1949
1950 if (sc == NULL)
1951 return -1;
1952
1953 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1954 ttrace = thread__trace(thread, trace->output);
1955 if (ttrace == NULL)
1956 goto out_put;
1957
1958 trace__fprintf_sample(trace, evsel, sample, thread);
1959
1960 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1961
1962 if (ttrace->entry_str == NULL) {
1963 ttrace->entry_str = malloc(trace__entry_str_size);
1964 if (!ttrace->entry_str)
1965 goto out_put;
1966 }
1967
1968 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1969 trace__printf_interrupted_entry(trace);
1970 /*
1971 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
1972 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
1973 * this breaks syscall__augmented_args() check for augmented args, as we calculate
1974 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
1975 * so when handling, say the openat syscall, we end up getting 6 args for the
1976 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
1977 * thinking that the extra 2 u64 args are the augmented filename, so just check
1978 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
1979 */
1980 if (evsel != trace->syscalls.events.sys_enter)
1981 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1982 ttrace->entry_time = sample->time;
1983 msg = ttrace->entry_str;
1984 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1985
1986 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1987 args, augmented_args, augmented_args_size, trace, thread);
1988
1989 if (sc->is_exit) {
1990 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1991 int alignment = 0;
1992
1993 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
1994 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
1995 if (trace->args_alignment > printed)
1996 alignment = trace->args_alignment - printed;
1997 fprintf(trace->output, "%*s= ?\n", alignment, " ");
1998 }
1999 } else {
2000 ttrace->entry_pending = true;
2001 /* See trace__vfs_getname & trace__sys_exit */
2002 ttrace->filename.pending_open = false;
2003 }
2004
2005 if (trace->current != thread) {
2006 thread__put(trace->current);
2007 trace->current = thread__get(thread);
2008 }
2009 err = 0;
2010 out_put:
2011 thread__put(thread);
2012 return err;
2013 }
2014
2015 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2016 struct perf_sample *sample)
2017 {
2018 struct thread_trace *ttrace;
2019 struct thread *thread;
2020 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2021 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2022 char msg[1024];
2023 void *args, *augmented_args = NULL;
2024 int augmented_args_size;
2025
2026 if (sc == NULL)
2027 return -1;
2028
2029 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2030 ttrace = thread__trace(thread, trace->output);
2031 /*
2032 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2033 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2034 */
2035 if (ttrace == NULL)
2036 goto out_put;
2037
2038 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2039 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2040 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2041 fprintf(trace->output, "%s", msg);
2042 err = 0;
2043 out_put:
2044 thread__put(thread);
2045 return err;
2046 }
2047
2048 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2049 struct perf_sample *sample,
2050 struct callchain_cursor *cursor)
2051 {
2052 struct addr_location al;
2053 int max_stack = evsel->core.attr.sample_max_stack ?
2054 evsel->core.attr.sample_max_stack :
2055 trace->max_stack;
2056 int err;
2057
2058 if (machine__resolve(trace->host, &al, sample) < 0)
2059 return -1;
2060
2061 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2062 addr_location__put(&al);
2063 return err;
2064 }
2065
2066 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2067 {
2068 /* TODO: user-configurable print_opts */
2069 const unsigned int print_opts = EVSEL__PRINT_SYM |
2070 EVSEL__PRINT_DSO |
2071 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2072
2073 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
2074 }
2075
2076 static const char *errno_to_name(struct evsel *evsel, int err)
2077 {
2078 struct perf_env *env = perf_evsel__env(evsel);
2079 const char *arch_name = perf_env__arch(env);
2080
2081 return arch_syscalls__strerrno(arch_name, err);
2082 }
2083
2084 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2085 union perf_event *event __maybe_unused,
2086 struct perf_sample *sample)
2087 {
2088 long ret;
2089 u64 duration = 0;
2090 bool duration_calculated = false;
2091 struct thread *thread;
2092 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2093 int alignment = trace->args_alignment;
2094 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2095 struct thread_trace *ttrace;
2096
2097 if (sc == NULL)
2098 return -1;
2099
2100 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2101 ttrace = thread__trace(thread, trace->output);
2102 if (ttrace == NULL)
2103 goto out_put;
2104
2105 trace__fprintf_sample(trace, evsel, sample, thread);
2106
2107 if (trace->summary)
2108 thread__update_stats(ttrace, id, sample);
2109
2110 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2111
2112 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2113 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2114 ttrace->filename.pending_open = false;
2115 ++trace->stats.vfs_getname;
2116 }
2117
2118 if (ttrace->entry_time) {
2119 duration = sample->time - ttrace->entry_time;
2120 if (trace__filter_duration(trace, duration))
2121 goto out;
2122 duration_calculated = true;
2123 } else if (trace->duration_filter)
2124 goto out;
2125
2126 if (sample->callchain) {
2127 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2128 if (callchain_ret == 0) {
2129 if (callchain_cursor.nr < trace->min_stack)
2130 goto out;
2131 callchain_ret = 1;
2132 }
2133 }
2134
2135 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2136 goto out;
2137
2138 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2139
2140 if (ttrace->entry_pending) {
2141 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2142 } else {
2143 printed += fprintf(trace->output, " ... [");
2144 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2145 printed += 9;
2146 printed += fprintf(trace->output, "]: %s()", sc->name);
2147 }
2148
2149 printed++; /* the closing ')' */
2150
2151 if (alignment > printed)
2152 alignment -= printed;
2153 else
2154 alignment = 0;
2155
2156 fprintf(trace->output, ")%*s= ", alignment, " ");
2157
2158 if (sc->fmt == NULL) {
2159 if (ret < 0)
2160 goto errno_print;
2161 signed_print:
2162 fprintf(trace->output, "%ld", ret);
2163 } else if (ret < 0) {
2164 errno_print: {
2165 char bf[STRERR_BUFSIZE];
2166 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2167 *e = errno_to_name(evsel, -ret);
2168
2169 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2170 }
2171 } else if (ret == 0 && sc->fmt->timeout)
2172 fprintf(trace->output, "0 (Timeout)");
2173 else if (ttrace->ret_scnprintf) {
2174 char bf[1024];
2175 struct syscall_arg arg = {
2176 .val = ret,
2177 .thread = thread,
2178 .trace = trace,
2179 };
2180 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2181 ttrace->ret_scnprintf = NULL;
2182 fprintf(trace->output, "%s", bf);
2183 } else if (sc->fmt->hexret)
2184 fprintf(trace->output, "%#lx", ret);
2185 else if (sc->fmt->errpid) {
2186 struct thread *child = machine__find_thread(trace->host, ret, ret);
2187
2188 if (child != NULL) {
2189 fprintf(trace->output, "%ld", ret);
2190 if (child->comm_set)
2191 fprintf(trace->output, " (%s)", thread__comm_str(child));
2192 thread__put(child);
2193 }
2194 } else
2195 goto signed_print;
2196
2197 fputc('\n', trace->output);
2198
2199 /*
2200 * We only consider an 'event' for the sake of --max-events a non-filtered
2201 * sys_enter + sys_exit and other tracepoint events.
2202 */
2203 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2204 interrupted = true;
2205
2206 if (callchain_ret > 0)
2207 trace__fprintf_callchain(trace, sample);
2208 else if (callchain_ret < 0)
2209 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2210 out:
2211 ttrace->entry_pending = false;
2212 err = 0;
2213 out_put:
2214 thread__put(thread);
2215 return err;
2216 }
2217
2218 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2219 union perf_event *event __maybe_unused,
2220 struct perf_sample *sample)
2221 {
2222 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2223 struct thread_trace *ttrace;
2224 size_t filename_len, entry_str_len, to_move;
2225 ssize_t remaining_space;
2226 char *pos;
2227 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2228
2229 if (!thread)
2230 goto out;
2231
2232 ttrace = thread__priv(thread);
2233 if (!ttrace)
2234 goto out_put;
2235
2236 filename_len = strlen(filename);
2237 if (filename_len == 0)
2238 goto out_put;
2239
2240 if (ttrace->filename.namelen < filename_len) {
2241 char *f = realloc(ttrace->filename.name, filename_len + 1);
2242
2243 if (f == NULL)
2244 goto out_put;
2245
2246 ttrace->filename.namelen = filename_len;
2247 ttrace->filename.name = f;
2248 }
2249
2250 strcpy(ttrace->filename.name, filename);
2251 ttrace->filename.pending_open = true;
2252
2253 if (!ttrace->filename.ptr)
2254 goto out_put;
2255
2256 entry_str_len = strlen(ttrace->entry_str);
2257 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2258 if (remaining_space <= 0)
2259 goto out_put;
2260
2261 if (filename_len > (size_t)remaining_space) {
2262 filename += filename_len - remaining_space;
2263 filename_len = remaining_space;
2264 }
2265
2266 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2267 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2268 memmove(pos + filename_len, pos, to_move);
2269 memcpy(pos, filename, filename_len);
2270
2271 ttrace->filename.ptr = 0;
2272 ttrace->filename.entry_str_pos = 0;
2273 out_put:
2274 thread__put(thread);
2275 out:
2276 return 0;
2277 }
2278
2279 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2280 union perf_event *event __maybe_unused,
2281 struct perf_sample *sample)
2282 {
2283 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2284 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2285 struct thread *thread = machine__findnew_thread(trace->host,
2286 sample->pid,
2287 sample->tid);
2288 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2289
2290 if (ttrace == NULL)
2291 goto out_dump;
2292
2293 ttrace->runtime_ms += runtime_ms;
2294 trace->runtime_ms += runtime_ms;
2295 out_put:
2296 thread__put(thread);
2297 return 0;
2298
2299 out_dump:
2300 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2301 evsel->name,
2302 perf_evsel__strval(evsel, sample, "comm"),
2303 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2304 runtime,
2305 perf_evsel__intval(evsel, sample, "vruntime"));
2306 goto out_put;
2307 }
2308
2309 static int bpf_output__printer(enum binary_printer_ops op,
2310 unsigned int val, void *extra __maybe_unused, FILE *fp)
2311 {
2312 unsigned char ch = (unsigned char)val;
2313
2314 switch (op) {
2315 case BINARY_PRINT_CHAR_DATA:
2316 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2317 case BINARY_PRINT_DATA_BEGIN:
2318 case BINARY_PRINT_LINE_BEGIN:
2319 case BINARY_PRINT_ADDR:
2320 case BINARY_PRINT_NUM_DATA:
2321 case BINARY_PRINT_NUM_PAD:
2322 case BINARY_PRINT_SEP:
2323 case BINARY_PRINT_CHAR_PAD:
2324 case BINARY_PRINT_LINE_END:
2325 case BINARY_PRINT_DATA_END:
2326 default:
2327 break;
2328 }
2329
2330 return 0;
2331 }
2332
2333 static void bpf_output__fprintf(struct trace *trace,
2334 struct perf_sample *sample)
2335 {
2336 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2337 bpf_output__printer, NULL, trace->output);
2338 ++trace->nr_events_printed;
2339 }
2340
2341 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2342 union perf_event *event __maybe_unused,
2343 struct perf_sample *sample)
2344 {
2345 struct thread *thread;
2346 int callchain_ret = 0;
2347 /*
2348 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2349 * this event's max_events having been hit and this is an entry coming
2350 * from the ring buffer that we should discard, since the max events
2351 * have already been considered/printed.
2352 */
2353 if (evsel->disabled)
2354 return 0;
2355
2356 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2357
2358 if (sample->callchain) {
2359 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2360 if (callchain_ret == 0) {
2361 if (callchain_cursor.nr < trace->min_stack)
2362 goto out;
2363 callchain_ret = 1;
2364 }
2365 }
2366
2367 trace__printf_interrupted_entry(trace);
2368 trace__fprintf_tstamp(trace, sample->time, trace->output);
2369
2370 if (trace->trace_syscalls && trace->show_duration)
2371 fprintf(trace->output, "( ): ");
2372
2373 if (thread)
2374 trace__fprintf_comm_tid(trace, thread, trace->output);
2375
2376 if (evsel == trace->syscalls.events.augmented) {
2377 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2378 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2379
2380 if (sc) {
2381 fprintf(trace->output, "%s(", sc->name);
2382 trace__fprintf_sys_enter(trace, evsel, sample);
2383 fputc(')', trace->output);
2384 goto newline;
2385 }
2386
2387 /*
2388 * XXX: Not having the associated syscall info or not finding/adding
2389 * the thread should never happen, but if it does...
2390 * fall thru and print it as a bpf_output event.
2391 */
2392 }
2393
2394 fprintf(trace->output, "%s:", evsel->name);
2395
2396 if (perf_evsel__is_bpf_output(evsel)) {
2397 bpf_output__fprintf(trace, sample);
2398 } else if (evsel->tp_format) {
2399 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2400 trace__fprintf_sys_enter(trace, evsel, sample)) {
2401 event_format__fprintf(evsel->tp_format, sample->cpu,
2402 sample->raw_data, sample->raw_size,
2403 trace->output);
2404 ++trace->nr_events_printed;
2405
2406 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2407 evsel__disable(evsel);
2408 evsel__close(evsel);
2409 }
2410 }
2411 }
2412
2413 newline:
2414 fprintf(trace->output, "\n");
2415
2416 if (callchain_ret > 0)
2417 trace__fprintf_callchain(trace, sample);
2418 else if (callchain_ret < 0)
2419 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2420 out:
2421 thread__put(thread);
2422 return 0;
2423 }
2424
2425 static void print_location(FILE *f, struct perf_sample *sample,
2426 struct addr_location *al,
2427 bool print_dso, bool print_sym)
2428 {
2429
2430 if ((verbose > 0 || print_dso) && al->map)
2431 fprintf(f, "%s@", al->map->dso->long_name);
2432
2433 if ((verbose > 0 || print_sym) && al->sym)
2434 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2435 al->addr - al->sym->start);
2436 else if (al->map)
2437 fprintf(f, "0x%" PRIx64, al->addr);
2438 else
2439 fprintf(f, "0x%" PRIx64, sample->addr);
2440 }
2441
2442 static int trace__pgfault(struct trace *trace,
2443 struct evsel *evsel,
2444 union perf_event *event __maybe_unused,
2445 struct perf_sample *sample)
2446 {
2447 struct thread *thread;
2448 struct addr_location al;
2449 char map_type = 'd';
2450 struct thread_trace *ttrace;
2451 int err = -1;
2452 int callchain_ret = 0;
2453
2454 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2455
2456 if (sample->callchain) {
2457 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2458 if (callchain_ret == 0) {
2459 if (callchain_cursor.nr < trace->min_stack)
2460 goto out_put;
2461 callchain_ret = 1;
2462 }
2463 }
2464
2465 ttrace = thread__trace(thread, trace->output);
2466 if (ttrace == NULL)
2467 goto out_put;
2468
2469 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2470 ttrace->pfmaj++;
2471 else
2472 ttrace->pfmin++;
2473
2474 if (trace->summary_only)
2475 goto out;
2476
2477 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2478
2479 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2480
2481 fprintf(trace->output, "%sfault [",
2482 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2483 "maj" : "min");
2484
2485 print_location(trace->output, sample, &al, false, true);
2486
2487 fprintf(trace->output, "] => ");
2488
2489 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2490
2491 if (!al.map) {
2492 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2493
2494 if (al.map)
2495 map_type = 'x';
2496 else
2497 map_type = '?';
2498 }
2499
2500 print_location(trace->output, sample, &al, true, false);
2501
2502 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2503
2504 if (callchain_ret > 0)
2505 trace__fprintf_callchain(trace, sample);
2506 else if (callchain_ret < 0)
2507 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2508
2509 ++trace->nr_events_printed;
2510 out:
2511 err = 0;
2512 out_put:
2513 thread__put(thread);
2514 return err;
2515 }
2516
2517 static void trace__set_base_time(struct trace *trace,
2518 struct evsel *evsel,
2519 struct perf_sample *sample)
2520 {
2521 /*
2522 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2523 * and don't use sample->time unconditionally, we may end up having
2524 * some other event in the future without PERF_SAMPLE_TIME for good
2525 * reason, i.e. we may not be interested in its timestamps, just in
2526 * it taking place, picking some piece of information when it
2527 * appears in our event stream (vfs_getname comes to mind).
2528 */
2529 if (trace->base_time == 0 && !trace->full_time &&
2530 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2531 trace->base_time = sample->time;
2532 }
2533
2534 static int trace__process_sample(struct perf_tool *tool,
2535 union perf_event *event,
2536 struct perf_sample *sample,
2537 struct evsel *evsel,
2538 struct machine *machine __maybe_unused)
2539 {
2540 struct trace *trace = container_of(tool, struct trace, tool);
2541 struct thread *thread;
2542 int err = 0;
2543
2544 tracepoint_handler handler = evsel->handler;
2545
2546 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2547 if (thread && thread__is_filtered(thread))
2548 goto out;
2549
2550 trace__set_base_time(trace, evsel, sample);
2551
2552 if (handler) {
2553 ++trace->nr_events;
2554 handler(trace, evsel, event, sample);
2555 }
2556 out:
2557 thread__put(thread);
2558 return err;
2559 }
2560
2561 static int trace__record(struct trace *trace, int argc, const char **argv)
2562 {
2563 unsigned int rec_argc, i, j;
2564 const char **rec_argv;
2565 const char * const record_args[] = {
2566 "record",
2567 "-R",
2568 "-m", "1024",
2569 "-c", "1",
2570 };
2571
2572 const char * const sc_args[] = { "-e", };
2573 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2574 const char * const majpf_args[] = { "-e", "major-faults" };
2575 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2576 const char * const minpf_args[] = { "-e", "minor-faults" };
2577 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2578
2579 /* +1 is for the event string below */
2580 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2581 majpf_args_nr + minpf_args_nr + argc;
2582 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2583
2584 if (rec_argv == NULL)
2585 return -ENOMEM;
2586
2587 j = 0;
2588 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2589 rec_argv[j++] = record_args[i];
2590
2591 if (trace->trace_syscalls) {
2592 for (i = 0; i < sc_args_nr; i++)
2593 rec_argv[j++] = sc_args[i];
2594
2595 /* event string may be different for older kernels - e.g., RHEL6 */
2596 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2597 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2598 else if (is_valid_tracepoint("syscalls:sys_enter"))
2599 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2600 else {
2601 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2602 free(rec_argv);
2603 return -1;
2604 }
2605 }
2606
2607 if (trace->trace_pgfaults & TRACE_PFMAJ)
2608 for (i = 0; i < majpf_args_nr; i++)
2609 rec_argv[j++] = majpf_args[i];
2610
2611 if (trace->trace_pgfaults & TRACE_PFMIN)
2612 for (i = 0; i < minpf_args_nr; i++)
2613 rec_argv[j++] = minpf_args[i];
2614
2615 for (i = 0; i < (unsigned int)argc; i++)
2616 rec_argv[j++] = argv[i];
2617
2618 return cmd_record(j, rec_argv);
2619 }
2620
2621 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2622
2623 static bool evlist__add_vfs_getname(struct evlist *evlist)
2624 {
2625 bool found = false;
2626 struct evsel *evsel, *tmp;
2627 struct parse_events_error err = { .idx = 0, };
2628 int ret = parse_events(evlist, "probe:vfs_getname*", &err);
2629
2630 if (ret)
2631 return false;
2632
2633 evlist__for_each_entry_safe(evlist, evsel, tmp) {
2634 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
2635 continue;
2636
2637 if (perf_evsel__field(evsel, "pathname")) {
2638 evsel->handler = trace__vfs_getname;
2639 found = true;
2640 continue;
2641 }
2642
2643 list_del_init(&evsel->core.node);
2644 evsel->evlist = NULL;
2645 evsel__delete(evsel);
2646 }
2647
2648 return found;
2649 }
2650
2651 static struct evsel *perf_evsel__new_pgfault(u64 config)
2652 {
2653 struct evsel *evsel;
2654 struct perf_event_attr attr = {
2655 .type = PERF_TYPE_SOFTWARE,
2656 .mmap_data = 1,
2657 };
2658
2659 attr.config = config;
2660 attr.sample_period = 1;
2661
2662 event_attr_init(&attr);
2663
2664 evsel = evsel__new(&attr);
2665 if (evsel)
2666 evsel->handler = trace__pgfault;
2667
2668 return evsel;
2669 }
2670
2671 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2672 {
2673 const u32 type = event->header.type;
2674 struct evsel *evsel;
2675
2676 if (type != PERF_RECORD_SAMPLE) {
2677 trace__process_event(trace, trace->host, event, sample);
2678 return;
2679 }
2680
2681 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2682 if (evsel == NULL) {
2683 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2684 return;
2685 }
2686
2687 if (evswitch__discard(&trace->evswitch, evsel))
2688 return;
2689
2690 trace__set_base_time(trace, evsel, sample);
2691
2692 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
2693 sample->raw_data == NULL) {
2694 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2695 perf_evsel__name(evsel), sample->tid,
2696 sample->cpu, sample->raw_size);
2697 } else {
2698 tracepoint_handler handler = evsel->handler;
2699 handler(trace, evsel, event, sample);
2700 }
2701
2702 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
2703 interrupted = true;
2704 }
2705
2706 static int trace__add_syscall_newtp(struct trace *trace)
2707 {
2708 int ret = -1;
2709 struct evlist *evlist = trace->evlist;
2710 struct evsel *sys_enter, *sys_exit;
2711
2712 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
2713 if (sys_enter == NULL)
2714 goto out;
2715
2716 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2717 goto out_delete_sys_enter;
2718
2719 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
2720 if (sys_exit == NULL)
2721 goto out_delete_sys_enter;
2722
2723 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2724 goto out_delete_sys_exit;
2725
2726 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2727 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2728
2729 evlist__add(evlist, sys_enter);
2730 evlist__add(evlist, sys_exit);
2731
2732 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2733 /*
2734 * We're interested only in the user space callchain
2735 * leading to the syscall, allow overriding that for
2736 * debugging reasons using --kernel_syscall_callchains
2737 */
2738 sys_exit->core.attr.exclude_callchain_kernel = 1;
2739 }
2740
2741 trace->syscalls.events.sys_enter = sys_enter;
2742 trace->syscalls.events.sys_exit = sys_exit;
2743
2744 ret = 0;
2745 out:
2746 return ret;
2747
2748 out_delete_sys_exit:
2749 evsel__delete_priv(sys_exit);
2750 out_delete_sys_enter:
2751 evsel__delete_priv(sys_enter);
2752 goto out;
2753 }
2754
2755 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
2756 {
2757 int err = -1;
2758 struct evsel *sys_exit;
2759 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2760 trace->ev_qualifier_ids.nr,
2761 trace->ev_qualifier_ids.entries);
2762
2763 if (filter == NULL)
2764 goto out_enomem;
2765
2766 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2767 filter)) {
2768 sys_exit = trace->syscalls.events.sys_exit;
2769 err = perf_evsel__append_tp_filter(sys_exit, filter);
2770 }
2771
2772 free(filter);
2773 out:
2774 return err;
2775 out_enomem:
2776 errno = ENOMEM;
2777 goto out;
2778 }
2779
2780 #ifdef HAVE_LIBBPF_SUPPORT
2781 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
2782 {
2783 if (trace->bpf_obj == NULL)
2784 return NULL;
2785
2786 return bpf_object__find_program_by_title(trace->bpf_obj, name);
2787 }
2788
2789 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
2790 const char *prog_name, const char *type)
2791 {
2792 struct bpf_program *prog;
2793
2794 if (prog_name == NULL) {
2795 char default_prog_name[256];
2796 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
2797 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
2798 if (prog != NULL)
2799 goto out_found;
2800 if (sc->fmt && sc->fmt->alias) {
2801 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
2802 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
2803 if (prog != NULL)
2804 goto out_found;
2805 }
2806 goto out_unaugmented;
2807 }
2808
2809 prog = trace__find_bpf_program_by_title(trace, prog_name);
2810
2811 if (prog != NULL) {
2812 out_found:
2813 return prog;
2814 }
2815
2816 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
2817 prog_name, type, sc->name);
2818 out_unaugmented:
2819 return trace->syscalls.unaugmented_prog;
2820 }
2821
2822 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
2823 {
2824 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2825
2826 if (sc == NULL)
2827 return;
2828
2829 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
2830 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
2831 }
2832
2833 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
2834 {
2835 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2836 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
2837 }
2838
2839 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
2840 {
2841 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2842 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
2843 }
2844
2845 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
2846 {
2847 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2848 int arg = 0;
2849
2850 if (sc == NULL)
2851 goto out;
2852
2853 for (; arg < sc->nr_args; ++arg) {
2854 entry->string_args_len[arg] = 0;
2855 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
2856 /* Should be set like strace -s strsize */
2857 entry->string_args_len[arg] = PATH_MAX;
2858 }
2859 }
2860 out:
2861 for (; arg < 6; ++arg)
2862 entry->string_args_len[arg] = 0;
2863 }
2864 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
2865 {
2866 int fd = bpf_map__fd(trace->syscalls.map);
2867 struct bpf_map_syscall_entry value = {
2868 .enabled = !trace->not_ev_qualifier,
2869 };
2870 int err = 0;
2871 size_t i;
2872
2873 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
2874 int key = trace->ev_qualifier_ids.entries[i];
2875
2876 if (value.enabled) {
2877 trace__init_bpf_map_syscall_args(trace, key, &value);
2878 trace__init_syscall_bpf_progs(trace, key);
2879 }
2880
2881 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
2882 if (err)
2883 break;
2884 }
2885
2886 return err;
2887 }
2888
2889 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
2890 {
2891 int fd = bpf_map__fd(trace->syscalls.map);
2892 struct bpf_map_syscall_entry value = {
2893 .enabled = enabled,
2894 };
2895 int err = 0, key;
2896
2897 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
2898 if (enabled)
2899 trace__init_bpf_map_syscall_args(trace, key, &value);
2900
2901 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
2902 if (err)
2903 break;
2904 }
2905
2906 return err;
2907 }
2908
2909 static int trace__init_syscalls_bpf_map(struct trace *trace)
2910 {
2911 bool enabled = true;
2912
2913 if (trace->ev_qualifier_ids.nr)
2914 enabled = trace->not_ev_qualifier;
2915
2916 return __trace__init_syscalls_bpf_map(trace, enabled);
2917 }
2918
2919 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
2920 {
2921 struct tep_format_field *field, *candidate_field;
2922 int id;
2923
2924 /*
2925 * We're only interested in syscalls that have a pointer:
2926 */
2927 for (field = sc->args; field; field = field->next) {
2928 if (field->flags & TEP_FIELD_IS_POINTER)
2929 goto try_to_find_pair;
2930 }
2931
2932 return NULL;
2933
2934 try_to_find_pair:
2935 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
2936 struct syscall *pair = trace__syscall_info(trace, NULL, id);
2937 struct bpf_program *pair_prog;
2938 bool is_candidate = false;
2939
2940 if (pair == NULL || pair == sc ||
2941 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
2942 continue;
2943
2944 for (field = sc->args, candidate_field = pair->args;
2945 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
2946 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
2947 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
2948
2949 if (is_pointer) {
2950 if (!candidate_is_pointer) {
2951 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
2952 continue;
2953 }
2954 } else {
2955 if (candidate_is_pointer) {
2956 // The candidate might copy a pointer we don't have, skip it.
2957 goto next_candidate;
2958 }
2959 continue;
2960 }
2961
2962 if (strcmp(field->type, candidate_field->type))
2963 goto next_candidate;
2964
2965 is_candidate = true;
2966 }
2967
2968 if (!is_candidate)
2969 goto next_candidate;
2970
2971 /*
2972 * Check if the tentative pair syscall augmenter has more pointers, if it has,
2973 * then it may be collecting that and we then can't use it, as it would collect
2974 * more than what is common to the two syscalls.
2975 */
2976 if (candidate_field) {
2977 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
2978 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
2979 goto next_candidate;
2980 }
2981
2982 pair_prog = pair->bpf_prog.sys_enter;
2983 /*
2984 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
2985 * have been searched for, so search it here and if it returns the
2986 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
2987 * program for a filtered syscall on a non-filtered one.
2988 *
2989 * For instance, we have "!syscalls:sys_enter_renameat" and that is
2990 * useful for "renameat2".
2991 */
2992 if (pair_prog == NULL) {
2993 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
2994 if (pair_prog == trace->syscalls.unaugmented_prog)
2995 goto next_candidate;
2996 }
2997
2998 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
2999 return pair_prog;
3000 next_candidate:
3001 continue;
3002 }
3003
3004 return NULL;
3005 }
3006
3007 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3008 {
3009 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3010 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3011 int err = 0, key;
3012
3013 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3014 int prog_fd;
3015
3016 if (!trace__syscall_enabled(trace, key))
3017 continue;
3018
3019 trace__init_syscall_bpf_progs(trace, key);
3020
3021 // It'll get at least the "!raw_syscalls:unaugmented"
3022 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3023 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3024 if (err)
3025 break;
3026 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3027 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3028 if (err)
3029 break;
3030 }
3031
3032 /*
3033 * Now lets do a second pass looking for enabled syscalls without
3034 * an augmenter that have a signature that is a superset of another
3035 * syscall with an augmenter so that we can auto-reuse it.
3036 *
3037 * I.e. if we have an augmenter for the "open" syscall that has
3038 * this signature:
3039 *
3040 * int open(const char *pathname, int flags, mode_t mode);
3041 *
3042 * I.e. that will collect just the first string argument, then we
3043 * can reuse it for the 'creat' syscall, that has this signature:
3044 *
3045 * int creat(const char *pathname, mode_t mode);
3046 *
3047 * and for:
3048 *
3049 * int stat(const char *pathname, struct stat *statbuf);
3050 * int lstat(const char *pathname, struct stat *statbuf);
3051 *
3052 * Because the 'open' augmenter will collect the first arg as a string,
3053 * and leave alone all the other args, which already helps with
3054 * beautifying 'stat' and 'lstat''s pathname arg.
3055 *
3056 * Then, in time, when 'stat' gets an augmenter that collects both
3057 * first and second arg (this one on the raw_syscalls:sys_exit prog
3058 * array tail call, then that one will be used.
3059 */
3060 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3061 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3062 struct bpf_program *pair_prog;
3063 int prog_fd;
3064
3065 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3066 continue;
3067
3068 /*
3069 * For now we're just reusing the sys_enter prog, and if it
3070 * already has an augmenter, we don't need to find one.
3071 */
3072 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3073 continue;
3074
3075 /*
3076 * Look at all the other syscalls for one that has a signature
3077 * that is close enough that we can share:
3078 */
3079 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3080 if (pair_prog == NULL)
3081 continue;
3082
3083 sc->bpf_prog.sys_enter = pair_prog;
3084
3085 /*
3086 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3087 * with the fd for the program we're reusing:
3088 */
3089 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3090 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3091 if (err)
3092 break;
3093 }
3094
3095
3096 return err;
3097 }
3098 #else
3099 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3100 {
3101 return 0;
3102 }
3103
3104 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3105 {
3106 return 0;
3107 }
3108
3109 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3110 const char *name __maybe_unused)
3111 {
3112 return NULL;
3113 }
3114
3115 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3116 {
3117 return 0;
3118 }
3119 #endif // HAVE_LIBBPF_SUPPORT
3120
3121 static int trace__set_ev_qualifier_filter(struct trace *trace)
3122 {
3123 if (trace->syscalls.map)
3124 return trace__set_ev_qualifier_bpf_filter(trace);
3125 if (trace->syscalls.events.sys_enter)
3126 return trace__set_ev_qualifier_tp_filter(trace);
3127 return 0;
3128 }
3129
3130 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3131 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3132 {
3133 int err = 0;
3134 #ifdef HAVE_LIBBPF_SUPPORT
3135 bool value = true;
3136 int map_fd = bpf_map__fd(map);
3137 size_t i;
3138
3139 for (i = 0; i < npids; ++i) {
3140 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3141 if (err)
3142 break;
3143 }
3144 #endif
3145 return err;
3146 }
3147
3148 static int trace__set_filter_loop_pids(struct trace *trace)
3149 {
3150 unsigned int nr = 1, err;
3151 pid_t pids[32] = {
3152 getpid(),
3153 };
3154 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3155
3156 while (thread && nr < ARRAY_SIZE(pids)) {
3157 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3158
3159 if (parent == NULL)
3160 break;
3161
3162 if (!strcmp(thread__comm_str(parent), "sshd") ||
3163 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3164 pids[nr++] = parent->tid;
3165 break;
3166 }
3167 thread = parent;
3168 }
3169
3170 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids);
3171 if (!err && trace->filter_pids.map)
3172 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3173
3174 return err;
3175 }
3176
3177 static int trace__set_filter_pids(struct trace *trace)
3178 {
3179 int err = 0;
3180 /*
3181 * Better not use !target__has_task() here because we need to cover the
3182 * case where no threads were specified in the command line, but a
3183 * workload was, and in that case we will fill in the thread_map when
3184 * we fork the workload in perf_evlist__prepare_workload.
3185 */
3186 if (trace->filter_pids.nr > 0) {
3187 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3188 trace->filter_pids.entries);
3189 if (!err && trace->filter_pids.map) {
3190 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3191 trace->filter_pids.entries);
3192 }
3193 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3194 err = trace__set_filter_loop_pids(trace);
3195 }
3196
3197 return err;
3198 }
3199
3200 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3201 {
3202 struct evlist *evlist = trace->evlist;
3203 struct perf_sample sample;
3204 int err;
3205
3206 err = perf_evlist__parse_sample(evlist, event, &sample);
3207 if (err)
3208 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3209 else
3210 trace__handle_event(trace, event, &sample);
3211
3212 return 0;
3213 }
3214
3215 static int __trace__flush_events(struct trace *trace)
3216 {
3217 u64 first = ordered_events__first_time(&trace->oe.data);
3218 u64 flush = trace->oe.last - NSEC_PER_SEC;
3219
3220 /* Is there some thing to flush.. */
3221 if (first && first < flush)
3222 return ordered_events__flush_time(&trace->oe.data, flush);
3223
3224 return 0;
3225 }
3226
3227 static int trace__flush_events(struct trace *trace)
3228 {
3229 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3230 }
3231
3232 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3233 {
3234 int err;
3235
3236 if (!trace->sort_events)
3237 return __trace__deliver_event(trace, event);
3238
3239 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3240 if (err && err != -1)
3241 return err;
3242
3243 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3244 if (err)
3245 return err;
3246
3247 return trace__flush_events(trace);
3248 }
3249
3250 static int ordered_events__deliver_event(struct ordered_events *oe,
3251 struct ordered_event *event)
3252 {
3253 struct trace *trace = container_of(oe, struct trace, oe.data);
3254
3255 return __trace__deliver_event(trace, event->event);
3256 }
3257
3258 static int trace__run(struct trace *trace, int argc, const char **argv)
3259 {
3260 struct evlist *evlist = trace->evlist;
3261 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3262 int err = -1, i;
3263 unsigned long before;
3264 const bool forks = argc > 0;
3265 bool draining = false;
3266
3267 trace->live = true;
3268
3269 if (!trace->raw_augmented_syscalls) {
3270 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3271 goto out_error_raw_syscalls;
3272
3273 if (trace->trace_syscalls)
3274 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3275 }
3276
3277 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3278 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3279 if (pgfault_maj == NULL)
3280 goto out_error_mem;
3281 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3282 evlist__add(evlist, pgfault_maj);
3283 }
3284
3285 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3286 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3287 if (pgfault_min == NULL)
3288 goto out_error_mem;
3289 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3290 evlist__add(evlist, pgfault_min);
3291 }
3292
3293 if (trace->sched &&
3294 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
3295 trace__sched_stat_runtime))
3296 goto out_error_sched_stat_runtime;
3297
3298 /*
3299 * If a global cgroup was set, apply it to all the events without an
3300 * explicit cgroup. I.e.:
3301 *
3302 * trace -G A -e sched:*switch
3303 *
3304 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3305 * _and_ sched:sched_switch to the 'A' cgroup, while:
3306 *
3307 * trace -e sched:*switch -G A
3308 *
3309 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3310 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3311 * a cgroup (on the root cgroup, sys wide, etc).
3312 *
3313 * Multiple cgroups:
3314 *
3315 * trace -G A -e sched:*switch -G B
3316 *
3317 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3318 * to the 'B' cgroup.
3319 *
3320 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3321 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3322 */
3323 if (trace->cgroup)
3324 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3325
3326 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3327 if (err < 0) {
3328 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3329 goto out_delete_evlist;
3330 }
3331
3332 err = trace__symbols_init(trace, evlist);
3333 if (err < 0) {
3334 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3335 goto out_delete_evlist;
3336 }
3337
3338 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3339
3340 signal(SIGCHLD, sig_handler);
3341 signal(SIGINT, sig_handler);
3342
3343 if (forks) {
3344 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3345 argv, false, NULL);
3346 if (err < 0) {
3347 fprintf(trace->output, "Couldn't run the workload!\n");
3348 goto out_delete_evlist;
3349 }
3350 }
3351
3352 err = evlist__open(evlist);
3353 if (err < 0)
3354 goto out_error_open;
3355
3356 err = bpf__apply_obj_config();
3357 if (err) {
3358 char errbuf[BUFSIZ];
3359
3360 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3361 pr_err("ERROR: Apply config to BPF failed: %s\n",
3362 errbuf);
3363 goto out_error_open;
3364 }
3365
3366 err = trace__set_filter_pids(trace);
3367 if (err < 0)
3368 goto out_error_mem;
3369
3370 if (trace->syscalls.map)
3371 trace__init_syscalls_bpf_map(trace);
3372
3373 if (trace->syscalls.prog_array.sys_enter)
3374 trace__init_syscalls_bpf_prog_array_maps(trace);
3375
3376 if (trace->ev_qualifier_ids.nr > 0) {
3377 err = trace__set_ev_qualifier_filter(trace);
3378 if (err < 0)
3379 goto out_errno;
3380
3381 if (trace->syscalls.events.sys_exit) {
3382 pr_debug("event qualifier tracepoint filter: %s\n",
3383 trace->syscalls.events.sys_exit->filter);
3384 }
3385 }
3386
3387 /*
3388 * If the "close" syscall is not traced, then we will not have the
3389 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3390 * fd->pathname table and were ending up showing the last value set by
3391 * syscalls opening a pathname and associating it with a descriptor or
3392 * reading it from /proc/pid/fd/ in cases where that doesn't make
3393 * sense.
3394 *
3395 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3396 * not in use.
3397 */
3398 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3399
3400 err = perf_evlist__apply_filters(evlist, &evsel);
3401 if (err < 0)
3402 goto out_error_apply_filters;
3403
3404 if (trace->dump.map)
3405 bpf_map__fprintf(trace->dump.map, trace->output);
3406
3407 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
3408 if (err < 0)
3409 goto out_error_mmap;
3410
3411 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3412 evlist__enable(evlist);
3413
3414 if (forks)
3415 perf_evlist__start_workload(evlist);
3416
3417 if (trace->opts.initial_delay) {
3418 usleep(trace->opts.initial_delay * 1000);
3419 evlist__enable(evlist);
3420 }
3421
3422 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3423 evlist->core.threads->nr > 1 ||
3424 perf_evlist__first(evlist)->core.attr.inherit;
3425
3426 /*
3427 * Now that we already used evsel->core.attr to ask the kernel to setup the
3428 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
3429 * trace__resolve_callchain(), allowing per-event max-stack settings
3430 * to override an explicitly set --max-stack global setting.
3431 */
3432 evlist__for_each_entry(evlist, evsel) {
3433 if (evsel__has_callchain(evsel) &&
3434 evsel->core.attr.sample_max_stack == 0)
3435 evsel->core.attr.sample_max_stack = trace->max_stack;
3436 }
3437 again:
3438 before = trace->nr_events;
3439
3440 for (i = 0; i < evlist->nr_mmaps; i++) {
3441 union perf_event *event;
3442 struct perf_mmap *md;
3443
3444 md = &evlist->mmap[i];
3445 if (perf_mmap__read_init(md) < 0)
3446 continue;
3447
3448 while ((event = perf_mmap__read_event(md)) != NULL) {
3449 ++trace->nr_events;
3450
3451 err = trace__deliver_event(trace, event);
3452 if (err)
3453 goto out_disable;
3454
3455 perf_mmap__consume(md);
3456
3457 if (interrupted)
3458 goto out_disable;
3459
3460 if (done && !draining) {
3461 evlist__disable(evlist);
3462 draining = true;
3463 }
3464 }
3465 perf_mmap__read_done(md);
3466 }
3467
3468 if (trace->nr_events == before) {
3469 int timeout = done ? 100 : -1;
3470
3471 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
3472 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
3473 draining = true;
3474
3475 goto again;
3476 } else {
3477 if (trace__flush_events(trace))
3478 goto out_disable;
3479 }
3480 } else {
3481 goto again;
3482 }
3483
3484 out_disable:
3485 thread__zput(trace->current);
3486
3487 evlist__disable(evlist);
3488
3489 if (trace->sort_events)
3490 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
3491
3492 if (!err) {
3493 if (trace->summary)
3494 trace__fprintf_thread_summary(trace, trace->output);
3495
3496 if (trace->show_tool_stats) {
3497 fprintf(trace->output, "Stats:\n "
3498 " vfs_getname : %" PRIu64 "\n"
3499 " proc_getname: %" PRIu64 "\n",
3500 trace->stats.vfs_getname,
3501 trace->stats.proc_getname);
3502 }
3503 }
3504
3505 out_delete_evlist:
3506 trace__symbols__exit(trace);
3507
3508 evlist__delete(evlist);
3509 cgroup__put(trace->cgroup);
3510 trace->evlist = NULL;
3511 trace->live = false;
3512 return err;
3513 {
3514 char errbuf[BUFSIZ];
3515
3516 out_error_sched_stat_runtime:
3517 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
3518 goto out_error;
3519
3520 out_error_raw_syscalls:
3521 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
3522 goto out_error;
3523
3524 out_error_mmap:
3525 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
3526 goto out_error;
3527
3528 out_error_open:
3529 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
3530
3531 out_error:
3532 fprintf(trace->output, "%s\n", errbuf);
3533 goto out_delete_evlist;
3534
3535 out_error_apply_filters:
3536 fprintf(trace->output,
3537 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
3538 evsel->filter, perf_evsel__name(evsel), errno,
3539 str_error_r(errno, errbuf, sizeof(errbuf)));
3540 goto out_delete_evlist;
3541 }
3542 out_error_mem:
3543 fprintf(trace->output, "Not enough memory to run!\n");
3544 goto out_delete_evlist;
3545
3546 out_errno:
3547 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
3548 goto out_delete_evlist;
3549 }
3550
3551 static int trace__replay(struct trace *trace)
3552 {
3553 const struct evsel_str_handler handlers[] = {
3554 { "probe:vfs_getname", trace__vfs_getname, },
3555 };
3556 struct perf_data data = {
3557 .path = input_name,
3558 .mode = PERF_DATA_MODE_READ,
3559 .force = trace->force,
3560 };
3561 struct perf_session *session;
3562 struct evsel *evsel;
3563 int err = -1;
3564
3565 trace->tool.sample = trace__process_sample;
3566 trace->tool.mmap = perf_event__process_mmap;
3567 trace->tool.mmap2 = perf_event__process_mmap2;
3568 trace->tool.comm = perf_event__process_comm;
3569 trace->tool.exit = perf_event__process_exit;
3570 trace->tool.fork = perf_event__process_fork;
3571 trace->tool.attr = perf_event__process_attr;
3572 trace->tool.tracing_data = perf_event__process_tracing_data;
3573 trace->tool.build_id = perf_event__process_build_id;
3574 trace->tool.namespaces = perf_event__process_namespaces;
3575
3576 trace->tool.ordered_events = true;
3577 trace->tool.ordering_requires_timestamps = true;
3578
3579 /* add tid to output */
3580 trace->multiple_threads = true;
3581
3582 session = perf_session__new(&data, false, &trace->tool);
3583 if (session == NULL)
3584 return -1;
3585
3586 if (trace->opts.target.pid)
3587 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
3588
3589 if (trace->opts.target.tid)
3590 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
3591
3592 if (symbol__init(&session->header.env) < 0)
3593 goto out;
3594
3595 trace->host = &session->machines.host;
3596
3597 err = perf_session__set_tracepoints_handlers(session, handlers);
3598 if (err)
3599 goto out;
3600
3601 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3602 "raw_syscalls:sys_enter");
3603 /* older kernels have syscalls tp versus raw_syscalls */
3604 if (evsel == NULL)
3605 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3606 "syscalls:sys_enter");
3607
3608 if (evsel &&
3609 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
3610 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
3611 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
3612 goto out;
3613 }
3614
3615 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3616 "raw_syscalls:sys_exit");
3617 if (evsel == NULL)
3618 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3619 "syscalls:sys_exit");
3620 if (evsel &&
3621 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
3622 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
3623 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
3624 goto out;
3625 }
3626
3627 evlist__for_each_entry(session->evlist, evsel) {
3628 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
3629 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
3630 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
3631 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
3632 evsel->handler = trace__pgfault;
3633 }
3634
3635 setup_pager();
3636
3637 err = perf_session__process_events(session);
3638 if (err)
3639 pr_err("Failed to process events, error %d", err);
3640
3641 else if (trace->summary)
3642 trace__fprintf_thread_summary(trace, trace->output);
3643
3644 out:
3645 perf_session__delete(session);
3646
3647 return err;
3648 }
3649
3650 static size_t trace__fprintf_threads_header(FILE *fp)
3651 {
3652 size_t printed;
3653
3654 printed = fprintf(fp, "\n Summary of events:\n\n");
3655
3656 return printed;
3657 }
3658
3659 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
3660 struct stats *stats;
3661 double msecs;
3662 int syscall;
3663 )
3664 {
3665 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
3666 struct stats *stats = source->priv;
3667
3668 entry->syscall = source->i;
3669 entry->stats = stats;
3670 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
3671 }
3672
3673 static size_t thread__dump_stats(struct thread_trace *ttrace,
3674 struct trace *trace, FILE *fp)
3675 {
3676 size_t printed = 0;
3677 struct syscall *sc;
3678 struct rb_node *nd;
3679 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
3680
3681 if (syscall_stats == NULL)
3682 return 0;
3683
3684 printed += fprintf(fp, "\n");
3685
3686 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
3687 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
3688 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
3689
3690 resort_rb__for_each_entry(nd, syscall_stats) {
3691 struct stats *stats = syscall_stats_entry->stats;
3692 if (stats) {
3693 double min = (double)(stats->min) / NSEC_PER_MSEC;
3694 double max = (double)(stats->max) / NSEC_PER_MSEC;
3695 double avg = avg_stats(stats);
3696 double pct;
3697 u64 n = (u64) stats->n;
3698
3699 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
3700 avg /= NSEC_PER_MSEC;
3701
3702 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
3703 printed += fprintf(fp, " %-15s", sc->name);
3704 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
3705 n, syscall_stats_entry->msecs, min, avg);
3706 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
3707 }
3708 }
3709
3710 resort_rb__delete(syscall_stats);
3711 printed += fprintf(fp, "\n\n");
3712
3713 return printed;
3714 }
3715
3716 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
3717 {
3718 size_t printed = 0;
3719 struct thread_trace *ttrace = thread__priv(thread);
3720 double ratio;
3721
3722 if (ttrace == NULL)
3723 return 0;
3724
3725 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
3726
3727 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
3728 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
3729 printed += fprintf(fp, "%.1f%%", ratio);
3730 if (ttrace->pfmaj)
3731 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
3732 if (ttrace->pfmin)
3733 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
3734 if (trace->sched)
3735 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
3736 else if (fputc('\n', fp) != EOF)
3737 ++printed;
3738
3739 printed += thread__dump_stats(ttrace, trace, fp);
3740
3741 return printed;
3742 }
3743
3744 static unsigned long thread__nr_events(struct thread_trace *ttrace)
3745 {
3746 return ttrace ? ttrace->nr_events : 0;
3747 }
3748
3749 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
3750 struct thread *thread;
3751 )
3752 {
3753 entry->thread = rb_entry(nd, struct thread, rb_node);
3754 }
3755
3756 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
3757 {
3758 size_t printed = trace__fprintf_threads_header(fp);
3759 struct rb_node *nd;
3760 int i;
3761
3762 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
3763 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
3764
3765 if (threads == NULL) {
3766 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
3767 return 0;
3768 }
3769
3770 resort_rb__for_each_entry(nd, threads)
3771 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
3772
3773 resort_rb__delete(threads);
3774 }
3775 return printed;
3776 }
3777
3778 static int trace__set_duration(const struct option *opt, const char *str,
3779 int unset __maybe_unused)
3780 {
3781 struct trace *trace = opt->value;
3782
3783 trace->duration_filter = atof(str);
3784 return 0;
3785 }
3786
3787 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
3788 int unset __maybe_unused)
3789 {
3790 int ret = -1;
3791 size_t i;
3792 struct trace *trace = opt->value;
3793 /*
3794 * FIXME: introduce a intarray class, plain parse csv and create a
3795 * { int nr, int entries[] } struct...
3796 */
3797 struct intlist *list = intlist__new(str);
3798
3799 if (list == NULL)
3800 return -1;
3801
3802 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
3803 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
3804
3805 if (trace->filter_pids.entries == NULL)
3806 goto out;
3807
3808 trace->filter_pids.entries[0] = getpid();
3809
3810 for (i = 1; i < trace->filter_pids.nr; ++i)
3811 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
3812
3813 intlist__delete(list);
3814 ret = 0;
3815 out:
3816 return ret;
3817 }
3818
3819 static int trace__open_output(struct trace *trace, const char *filename)
3820 {
3821 struct stat st;
3822
3823 if (!stat(filename, &st) && st.st_size) {
3824 char oldname[PATH_MAX];
3825
3826 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
3827 unlink(oldname);
3828 rename(filename, oldname);
3829 }
3830
3831 trace->output = fopen(filename, "w");
3832
3833 return trace->output == NULL ? -errno : 0;
3834 }
3835
3836 static int parse_pagefaults(const struct option *opt, const char *str,
3837 int unset __maybe_unused)
3838 {
3839 int *trace_pgfaults = opt->value;
3840
3841 if (strcmp(str, "all") == 0)
3842 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
3843 else if (strcmp(str, "maj") == 0)
3844 *trace_pgfaults |= TRACE_PFMAJ;
3845 else if (strcmp(str, "min") == 0)
3846 *trace_pgfaults |= TRACE_PFMIN;
3847 else
3848 return -1;
3849
3850 return 0;
3851 }
3852
3853 static void evlist__set_evsel_handler(struct evlist *evlist, void *handler)
3854 {
3855 struct evsel *evsel;
3856
3857 evlist__for_each_entry(evlist, evsel)
3858 evsel->handler = handler;
3859 }
3860
3861 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
3862 {
3863 struct evsel *evsel;
3864
3865 evlist__for_each_entry(evlist, evsel) {
3866 if (evsel->priv || !evsel->tp_format)
3867 continue;
3868
3869 if (strcmp(evsel->tp_format->system, "syscalls"))
3870 continue;
3871
3872 if (perf_evsel__init_syscall_tp(evsel))
3873 return -1;
3874
3875 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
3876 struct syscall_tp *sc = evsel->priv;
3877
3878 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
3879 return -1;
3880 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
3881 struct syscall_tp *sc = evsel->priv;
3882
3883 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
3884 return -1;
3885 }
3886 }
3887
3888 return 0;
3889 }
3890
3891 /*
3892 * XXX: Hackish, just splitting the combined -e+--event (syscalls
3893 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
3894 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
3895 *
3896 * It'd be better to introduce a parse_options() variant that would return a
3897 * list with the terms it didn't match to an event...
3898 */
3899 static int trace__parse_events_option(const struct option *opt, const char *str,
3900 int unset __maybe_unused)
3901 {
3902 struct trace *trace = (struct trace *)opt->value;
3903 const char *s = str;
3904 char *sep = NULL, *lists[2] = { NULL, NULL, };
3905 int len = strlen(str) + 1, err = -1, list, idx;
3906 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
3907 char group_name[PATH_MAX];
3908 struct syscall_fmt *fmt;
3909
3910 if (strace_groups_dir == NULL)
3911 return -1;
3912
3913 if (*s == '!') {
3914 ++s;
3915 trace->not_ev_qualifier = true;
3916 }
3917
3918 while (1) {
3919 if ((sep = strchr(s, ',')) != NULL)
3920 *sep = '\0';
3921
3922 list = 0;
3923 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
3924 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
3925 list = 1;
3926 goto do_concat;
3927 }
3928
3929 fmt = syscall_fmt__find_by_alias(s);
3930 if (fmt != NULL) {
3931 list = 1;
3932 s = fmt->name;
3933 } else {
3934 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
3935 if (access(group_name, R_OK) == 0)
3936 list = 1;
3937 }
3938 do_concat:
3939 if (lists[list]) {
3940 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
3941 } else {
3942 lists[list] = malloc(len);
3943 if (lists[list] == NULL)
3944 goto out;
3945 strcpy(lists[list], s);
3946 }
3947
3948 if (!sep)
3949 break;
3950
3951 *sep = ',';
3952 s = sep + 1;
3953 }
3954
3955 if (lists[1] != NULL) {
3956 struct strlist_config slist_config = {
3957 .dirname = strace_groups_dir,
3958 };
3959
3960 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
3961 if (trace->ev_qualifier == NULL) {
3962 fputs("Not enough memory to parse event qualifier", trace->output);
3963 goto out;
3964 }
3965
3966 if (trace__validate_ev_qualifier(trace))
3967 goto out;
3968 trace->trace_syscalls = true;
3969 }
3970
3971 err = 0;
3972
3973 if (lists[0]) {
3974 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3975 "event selector. use 'perf list' to list available events",
3976 parse_events_option);
3977 err = parse_events_option(&o, lists[0], 0);
3978 }
3979 out:
3980 if (sep)
3981 *sep = ',';
3982
3983 return err;
3984 }
3985
3986 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3987 {
3988 struct trace *trace = opt->value;
3989
3990 if (!list_empty(&trace->evlist->core.entries))
3991 return parse_cgroups(opt, str, unset);
3992
3993 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
3994
3995 return 0;
3996 }
3997
3998 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3999 {
4000 if (trace->bpf_obj == NULL)
4001 return NULL;
4002
4003 return bpf_object__find_map_by_name(trace->bpf_obj, name);
4004 }
4005
4006 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
4007 {
4008 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
4009 }
4010
4011 static void trace__set_bpf_map_syscalls(struct trace *trace)
4012 {
4013 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
4014 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
4015 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
4016 }
4017
4018 static int trace__config(const char *var, const char *value, void *arg)
4019 {
4020 struct trace *trace = arg;
4021 int err = 0;
4022
4023 if (!strcmp(var, "trace.add_events")) {
4024 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4025 "event selector. use 'perf list' to list available events",
4026 parse_events_option);
4027 /*
4028 * We can't propagate parse_event_option() return, as it is 1
4029 * for failure while perf_config() expects -1.
4030 */
4031 if (parse_events_option(&o, value, 0))
4032 err = -1;
4033 } else if (!strcmp(var, "trace.show_timestamp")) {
4034 trace->show_tstamp = perf_config_bool(var, value);
4035 } else if (!strcmp(var, "trace.show_duration")) {
4036 trace->show_duration = perf_config_bool(var, value);
4037 } else if (!strcmp(var, "trace.show_arg_names")) {
4038 trace->show_arg_names = perf_config_bool(var, value);
4039 if (!trace->show_arg_names)
4040 trace->show_zeros = true;
4041 } else if (!strcmp(var, "trace.show_zeros")) {
4042 bool new_show_zeros = perf_config_bool(var, value);
4043 if (!trace->show_arg_names && !new_show_zeros) {
4044 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4045 goto out;
4046 }
4047 trace->show_zeros = new_show_zeros;
4048 } else if (!strcmp(var, "trace.show_prefix")) {
4049 trace->show_string_prefix = perf_config_bool(var, value);
4050 } else if (!strcmp(var, "trace.no_inherit")) {
4051 trace->opts.no_inherit = perf_config_bool(var, value);
4052 } else if (!strcmp(var, "trace.args_alignment")) {
4053 int args_alignment = 0;
4054 if (perf_config_int(&args_alignment, var, value) == 0)
4055 trace->args_alignment = args_alignment;
4056 }
4057 out:
4058 return err;
4059 }
4060
4061 int cmd_trace(int argc, const char **argv)
4062 {
4063 const char *trace_usage[] = {
4064 "perf trace [<options>] [<command>]",
4065 "perf trace [<options>] -- <command> [<options>]",
4066 "perf trace record [<options>] [<command>]",
4067 "perf trace record [<options>] -- <command> [<options>]",
4068 NULL
4069 };
4070 struct trace trace = {
4071 .opts = {
4072 .target = {
4073 .uid = UINT_MAX,
4074 .uses_mmap = true,
4075 },
4076 .user_freq = UINT_MAX,
4077 .user_interval = ULLONG_MAX,
4078 .no_buffering = true,
4079 .mmap_pages = UINT_MAX,
4080 },
4081 .output = stderr,
4082 .show_comm = true,
4083 .show_tstamp = true,
4084 .show_duration = true,
4085 .show_arg_names = true,
4086 .args_alignment = 70,
4087 .trace_syscalls = false,
4088 .kernel_syscallchains = false,
4089 .max_stack = UINT_MAX,
4090 .max_events = ULONG_MAX,
4091 };
4092 const char *map_dump_str = NULL;
4093 const char *output_name = NULL;
4094 const struct option trace_options[] = {
4095 OPT_CALLBACK('e', "event", &trace, "event",
4096 "event/syscall selector. use 'perf list' to list available events",
4097 trace__parse_events_option),
4098 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4099 "show the thread COMM next to its id"),
4100 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4101 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4102 trace__parse_events_option),
4103 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4104 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4105 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4106 "trace events on existing process id"),
4107 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4108 "trace events on existing thread id"),
4109 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4110 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4111 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4112 "system-wide collection from all CPUs"),
4113 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4114 "list of cpus to monitor"),
4115 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4116 "child tasks do not inherit counters"),
4117 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4118 "number of mmap data pages",
4119 perf_evlist__parse_mmap_pages),
4120 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4121 "user to profile"),
4122 OPT_CALLBACK(0, "duration", &trace, "float",
4123 "show only events with duration > N.M ms",
4124 trace__set_duration),
4125 #ifdef HAVE_LIBBPF_SUPPORT
4126 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4127 #endif
4128 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4129 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4130 OPT_BOOLEAN('T', "time", &trace.full_time,
4131 "Show full timestamp, not time relative to first start"),
4132 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4133 "Show only syscalls that failed"),
4134 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4135 "Show only syscall summary with statistics"),
4136 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4137 "Show all syscalls and summary with statistics"),
4138 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4139 "Trace pagefaults", parse_pagefaults, "maj"),
4140 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4141 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4142 OPT_CALLBACK(0, "call-graph", &trace.opts,
4143 "record_mode[,record_size]", record_callchain_help,
4144 &record_parse_callchain_opt),
4145 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4146 "Show the kernel callchains on the syscall exit path"),
4147 OPT_ULONG(0, "max-events", &trace.max_events,
4148 "Set the maximum number of events to print, exit after that is reached. "),
4149 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4150 "Set the minimum stack depth when parsing the callchain, "
4151 "anything below the specified depth will be ignored."),
4152 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4153 "Set the maximum stack depth when parsing the callchain, "
4154 "anything beyond the specified depth will be ignored. "
4155 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4156 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4157 "Sort batch of events before processing, use if getting out of order events"),
4158 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4159 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4160 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4161 "per thread proc mmap processing timeout in ms"),
4162 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4163 trace__parse_cgroups),
4164 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
4165 "ms to wait before starting measurement after program "
4166 "start"),
4167 OPTS_EVSWITCH(&trace.evswitch),
4168 OPT_END()
4169 };
4170 bool __maybe_unused max_stack_user_set = true;
4171 bool mmap_pages_user_set = true;
4172 struct evsel *evsel;
4173 const char * const trace_subcommands[] = { "record", NULL };
4174 int err = -1;
4175 char bf[BUFSIZ];
4176
4177 signal(SIGSEGV, sighandler_dump_stack);
4178 signal(SIGFPE, sighandler_dump_stack);
4179
4180 trace.evlist = evlist__new();
4181 trace.sctbl = syscalltbl__new();
4182
4183 if (trace.evlist == NULL || trace.sctbl == NULL) {
4184 pr_err("Not enough memory to run!\n");
4185 err = -ENOMEM;
4186 goto out;
4187 }
4188
4189 /*
4190 * Parsing .perfconfig may entail creating a BPF event, that may need
4191 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4192 * is too small. This affects just this process, not touching the
4193 * global setting. If it fails we'll get something in 'perf trace -v'
4194 * to help diagnose the problem.
4195 */
4196 rlimit__bump_memlock();
4197
4198 err = perf_config(trace__config, &trace);
4199 if (err)
4200 goto out;
4201
4202 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4203 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4204
4205 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4206 usage_with_options_msg(trace_usage, trace_options,
4207 "cgroup monitoring only available in system-wide mode");
4208 }
4209
4210 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4211 if (IS_ERR(evsel)) {
4212 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4213 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4214 goto out;
4215 }
4216
4217 if (evsel) {
4218 trace.syscalls.events.augmented = evsel;
4219
4220 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4221 if (evsel == NULL) {
4222 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4223 goto out;
4224 }
4225
4226 if (evsel->bpf_obj == NULL) {
4227 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4228 goto out;
4229 }
4230
4231 trace.bpf_obj = evsel->bpf_obj;
4232
4233 trace__set_bpf_map_filtered_pids(&trace);
4234 trace__set_bpf_map_syscalls(&trace);
4235 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4236 }
4237
4238 err = bpf__setup_stdout(trace.evlist);
4239 if (err) {
4240 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4241 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4242 goto out;
4243 }
4244
4245 err = -1;
4246
4247 if (map_dump_str) {
4248 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4249 if (trace.dump.map == NULL) {
4250 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4251 goto out;
4252 }
4253 }
4254
4255 if (trace.trace_pgfaults) {
4256 trace.opts.sample_address = true;
4257 trace.opts.sample_time = true;
4258 }
4259
4260 if (trace.opts.mmap_pages == UINT_MAX)
4261 mmap_pages_user_set = false;
4262
4263 if (trace.max_stack == UINT_MAX) {
4264 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4265 max_stack_user_set = false;
4266 }
4267
4268 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4269 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4270 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4271 }
4272 #endif
4273
4274 if (callchain_param.enabled) {
4275 if (!mmap_pages_user_set && geteuid() == 0)
4276 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4277
4278 symbol_conf.use_callchain = true;
4279 }
4280
4281 if (trace.evlist->core.nr_entries > 0) {
4282 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
4283 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4284 perror("failed to set syscalls:* tracepoint fields");
4285 goto out;
4286 }
4287 }
4288
4289 if (trace.sort_events) {
4290 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4291 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4292 }
4293
4294 /*
4295 * If we are augmenting syscalls, then combine what we put in the
4296 * __augmented_syscalls__ BPF map with what is in the
4297 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4298 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4299 *
4300 * We'll switch to look at two BPF maps, one for sys_enter and the
4301 * other for sys_exit when we start augmenting the sys_exit paths with
4302 * buffers that are being copied from kernel to userspace, think 'read'
4303 * syscall.
4304 */
4305 if (trace.syscalls.events.augmented) {
4306 evlist__for_each_entry(trace.evlist, evsel) {
4307 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4308
4309 if (raw_syscalls_sys_exit) {
4310 trace.raw_augmented_syscalls = true;
4311 goto init_augmented_syscall_tp;
4312 }
4313
4314 if (trace.syscalls.events.augmented->priv == NULL &&
4315 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
4316 struct evsel *augmented = trace.syscalls.events.augmented;
4317 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
4318 perf_evsel__init_augmented_syscall_tp_args(augmented))
4319 goto out;
4320 /*
4321 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
4322 * Above we made sure we can get from the payload the tp fields
4323 * that we get from syscalls:sys_enter tracefs format file.
4324 */
4325 augmented->handler = trace__sys_enter;
4326 /*
4327 * Now we do the same for the *syscalls:sys_enter event so that
4328 * if we handle it directly, i.e. if the BPF prog returns 0 so
4329 * as not to filter it, then we'll handle it just like we would
4330 * for the BPF_OUTPUT one:
4331 */
4332 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) ||
4333 perf_evsel__init_augmented_syscall_tp_args(evsel))
4334 goto out;
4335 evsel->handler = trace__sys_enter;
4336 }
4337
4338 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
4339 struct syscall_tp *sc;
4340 init_augmented_syscall_tp:
4341 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
4342 goto out;
4343 sc = evsel->priv;
4344 /*
4345 * For now with BPF raw_augmented we hook into
4346 * raw_syscalls:sys_enter and there we get all
4347 * 6 syscall args plus the tracepoint common
4348 * fields and the syscall_nr (another long).
4349 * So we check if that is the case and if so
4350 * don't look after the sc->args_size but
4351 * always after the full raw_syscalls:sys_enter
4352 * payload, which is fixed.
4353 *
4354 * We'll revisit this later to pass
4355 * s->args_size to the BPF augmenter (now
4356 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
4357 * so that it copies only what we need for each
4358 * syscall, like what happens when we use
4359 * syscalls:sys_enter_NAME, so that we reduce
4360 * the kernel/userspace traffic to just what is
4361 * needed for each syscall.
4362 */
4363 if (trace.raw_augmented_syscalls)
4364 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
4365 perf_evsel__init_augmented_syscall_tp_ret(evsel);
4366 evsel->handler = trace__sys_exit;
4367 }
4368 }
4369 }
4370
4371 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
4372 return trace__record(&trace, argc-1, &argv[1]);
4373
4374 /* summary_only implies summary option, but don't overwrite summary if set */
4375 if (trace.summary_only)
4376 trace.summary = trace.summary_only;
4377
4378 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4379 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4380 trace.trace_syscalls = true;
4381 }
4382
4383 if (output_name != NULL) {
4384 err = trace__open_output(&trace, output_name);
4385 if (err < 0) {
4386 perror("failed to create output file");
4387 goto out;
4388 }
4389 }
4390
4391 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
4392 if (err)
4393 goto out_close;
4394
4395 err = target__validate(&trace.opts.target);
4396 if (err) {
4397 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4398 fprintf(trace.output, "%s", bf);
4399 goto out_close;
4400 }
4401
4402 err = target__parse_uid(&trace.opts.target);
4403 if (err) {
4404 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4405 fprintf(trace.output, "%s", bf);
4406 goto out_close;
4407 }
4408
4409 if (!argc && target__none(&trace.opts.target))
4410 trace.opts.target.system_wide = true;
4411
4412 if (input_name)
4413 err = trace__replay(&trace);
4414 else
4415 err = trace__run(&trace, argc, argv);
4416
4417 out_close:
4418 if (output_name != NULL)
4419 fclose(trace.output);
4420 out:
4421 return err;
4422 }
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