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Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-hirsute-kernel.git] / tools / perf / builtin-trace.c
1 /*
2 * builtin-trace.c
3 *
4 * Builtin 'trace' command:
5 *
6 * Display a continuously updated trace of any workload, CPU, specific PID,
7 * system wide, etc. Default format is loosely strace like, but any other
8 * event may be specified using --event.
9 *
10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 *
12 * Initially based on the 'trace' prototype by Thomas Gleixner:
13 *
14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
15 */
16
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/dso.h"
29 #include "util/env.h"
30 #include "util/event.h"
31 #include "util/evlist.h"
32 #include "util/evswitch.h"
33 #include <subcmd/pager.h>
34 #include <subcmd/exec-cmd.h>
35 #include "util/machine.h"
36 #include "util/map.h"
37 #include "util/symbol.h"
38 #include "util/path.h"
39 #include "util/session.h"
40 #include "util/thread.h"
41 #include <subcmd/parse-options.h>
42 #include "util/strlist.h"
43 #include "util/intlist.h"
44 #include "util/thread_map.h"
45 #include "util/stat.h"
46 #include "util/tool.h"
47 #include "util/util.h"
48 #include "trace/beauty/beauty.h"
49 #include "trace-event.h"
50 #include "util/parse-events.h"
51 #include "util/bpf-loader.h"
52 #include "callchain.h"
53 #include "print_binary.h"
54 #include "string2.h"
55 #include "syscalltbl.h"
56 #include "rb_resort.h"
57 #include "../perf.h"
58
59 #include <errno.h>
60 #include <inttypes.h>
61 #include <poll.h>
62 #include <signal.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <linux/err.h>
66 #include <linux/filter.h>
67 #include <linux/kernel.h>
68 #include <linux/random.h>
69 #include <linux/stringify.h>
70 #include <linux/time64.h>
71 #include <linux/zalloc.h>
72 #include <fcntl.h>
73 #include <sys/sysmacros.h>
74
75 #include <linux/ctype.h>
76
77 #ifndef O_CLOEXEC
78 # define O_CLOEXEC 02000000
79 #endif
80
81 #ifndef F_LINUX_SPECIFIC_BASE
82 # define F_LINUX_SPECIFIC_BASE 1024
83 #endif
84
85 struct trace {
86 struct perf_tool tool;
87 struct syscalltbl *sctbl;
88 struct {
89 struct syscall *table;
90 struct bpf_map *map;
91 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
92 struct bpf_map *sys_enter,
93 *sys_exit;
94 } prog_array;
95 struct {
96 struct evsel *sys_enter,
97 *sys_exit,
98 *augmented;
99 } events;
100 struct bpf_program *unaugmented_prog;
101 } syscalls;
102 struct {
103 struct bpf_map *map;
104 } dump;
105 struct record_opts opts;
106 struct evlist *evlist;
107 struct machine *host;
108 struct thread *current;
109 struct bpf_object *bpf_obj;
110 struct cgroup *cgroup;
111 u64 base_time;
112 FILE *output;
113 unsigned long nr_events;
114 unsigned long nr_events_printed;
115 unsigned long max_events;
116 struct evswitch evswitch;
117 struct strlist *ev_qualifier;
118 struct {
119 size_t nr;
120 int *entries;
121 } ev_qualifier_ids;
122 struct {
123 size_t nr;
124 pid_t *entries;
125 struct bpf_map *map;
126 } filter_pids;
127 double duration_filter;
128 double runtime_ms;
129 struct {
130 u64 vfs_getname,
131 proc_getname;
132 } stats;
133 unsigned int max_stack;
134 unsigned int min_stack;
135 int raw_augmented_syscalls_args_size;
136 bool raw_augmented_syscalls;
137 bool fd_path_disabled;
138 bool sort_events;
139 bool not_ev_qualifier;
140 bool live;
141 bool full_time;
142 bool sched;
143 bool multiple_threads;
144 bool summary;
145 bool summary_only;
146 bool failure_only;
147 bool show_comm;
148 bool print_sample;
149 bool show_tool_stats;
150 bool trace_syscalls;
151 bool kernel_syscallchains;
152 s16 args_alignment;
153 bool show_tstamp;
154 bool show_duration;
155 bool show_zeros;
156 bool show_arg_names;
157 bool show_string_prefix;
158 bool force;
159 bool vfs_getname;
160 int trace_pgfaults;
161 struct {
162 struct ordered_events data;
163 u64 last;
164 } oe;
165 };
166
167 struct tp_field {
168 int offset;
169 union {
170 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
171 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
172 };
173 };
174
175 #define TP_UINT_FIELD(bits) \
176 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
177 { \
178 u##bits value; \
179 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
180 return value; \
181 }
182
183 TP_UINT_FIELD(8);
184 TP_UINT_FIELD(16);
185 TP_UINT_FIELD(32);
186 TP_UINT_FIELD(64);
187
188 #define TP_UINT_FIELD__SWAPPED(bits) \
189 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
190 { \
191 u##bits value; \
192 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
193 return bswap_##bits(value);\
194 }
195
196 TP_UINT_FIELD__SWAPPED(16);
197 TP_UINT_FIELD__SWAPPED(32);
198 TP_UINT_FIELD__SWAPPED(64);
199
200 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
201 {
202 field->offset = offset;
203
204 switch (size) {
205 case 1:
206 field->integer = tp_field__u8;
207 break;
208 case 2:
209 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
210 break;
211 case 4:
212 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
213 break;
214 case 8:
215 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
216 break;
217 default:
218 return -1;
219 }
220
221 return 0;
222 }
223
224 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
225 {
226 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
227 }
228
229 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
230 {
231 return sample->raw_data + field->offset;
232 }
233
234 static int __tp_field__init_ptr(struct tp_field *field, int offset)
235 {
236 field->offset = offset;
237 field->pointer = tp_field__ptr;
238 return 0;
239 }
240
241 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
242 {
243 return __tp_field__init_ptr(field, format_field->offset);
244 }
245
246 struct syscall_tp {
247 struct tp_field id;
248 union {
249 struct tp_field args, ret;
250 };
251 };
252
253 static int perf_evsel__init_tp_uint_field(struct evsel *evsel,
254 struct tp_field *field,
255 const char *name)
256 {
257 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
258
259 if (format_field == NULL)
260 return -1;
261
262 return tp_field__init_uint(field, format_field, evsel->needs_swap);
263 }
264
265 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
266 ({ struct syscall_tp *sc = evsel->priv;\
267 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
268
269 static int perf_evsel__init_tp_ptr_field(struct evsel *evsel,
270 struct tp_field *field,
271 const char *name)
272 {
273 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
274
275 if (format_field == NULL)
276 return -1;
277
278 return tp_field__init_ptr(field, format_field);
279 }
280
281 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
282 ({ struct syscall_tp *sc = evsel->priv;\
283 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
284
285 static void evsel__delete_priv(struct evsel *evsel)
286 {
287 zfree(&evsel->priv);
288 evsel__delete(evsel);
289 }
290
291 static int perf_evsel__init_syscall_tp(struct evsel *evsel)
292 {
293 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
294
295 if (evsel->priv != NULL) {
296 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
297 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
298 goto out_delete;
299 return 0;
300 }
301
302 return -ENOMEM;
303 out_delete:
304 zfree(&evsel->priv);
305 return -ENOENT;
306 }
307
308 static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
309 {
310 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
311
312 if (evsel->priv != NULL) {
313 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
314 if (syscall_id == NULL)
315 syscall_id = perf_evsel__field(tp, "__syscall_nr");
316 if (syscall_id == NULL)
317 goto out_delete;
318 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
319 goto out_delete;
320
321 return 0;
322 }
323
324 return -ENOMEM;
325 out_delete:
326 zfree(&evsel->priv);
327 return -EINVAL;
328 }
329
330 static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
331 {
332 struct syscall_tp *sc = evsel->priv;
333
334 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
335 }
336
337 static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
338 {
339 struct syscall_tp *sc = evsel->priv;
340
341 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
342 }
343
344 static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
345 {
346 evsel->priv = malloc(sizeof(struct syscall_tp));
347 if (evsel->priv != NULL) {
348 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
349 goto out_delete;
350
351 evsel->handler = handler;
352 return 0;
353 }
354
355 return -ENOMEM;
356
357 out_delete:
358 zfree(&evsel->priv);
359 return -ENOENT;
360 }
361
362 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
363 {
364 struct evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
365
366 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
367 if (IS_ERR(evsel))
368 evsel = perf_evsel__newtp("syscalls", direction);
369
370 if (IS_ERR(evsel))
371 return NULL;
372
373 if (perf_evsel__init_raw_syscall_tp(evsel, handler))
374 goto out_delete;
375
376 return evsel;
377
378 out_delete:
379 evsel__delete_priv(evsel);
380 return NULL;
381 }
382
383 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
384 ({ struct syscall_tp *fields = evsel->priv; \
385 fields->name.integer(&fields->name, sample); })
386
387 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
388 ({ struct syscall_tp *fields = evsel->priv; \
389 fields->name.pointer(&fields->name, sample); })
390
391 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
392 {
393 int idx = val - sa->offset;
394
395 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
396 size_t printed = scnprintf(bf, size, intfmt, val);
397 if (show_prefix)
398 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
399 return printed;
400 }
401
402 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
403 }
404
405 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
406 const char *intfmt,
407 struct syscall_arg *arg)
408 {
409 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
410 }
411
412 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
413 struct syscall_arg *arg)
414 {
415 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
416 }
417
418 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
419
420 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
421 {
422 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
423 }
424
425 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
426 {
427 size_t printed;
428 int i;
429
430 for (i = 0; i < sas->nr_entries; ++i) {
431 struct strarray *sa = sas->entries[i];
432 int idx = val - sa->offset;
433
434 if (idx >= 0 && idx < sa->nr_entries) {
435 if (sa->entries[idx] == NULL)
436 break;
437 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
438 }
439 }
440
441 printed = scnprintf(bf, size, intfmt, val);
442 if (show_prefix)
443 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
444 return printed;
445 }
446
447 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
448 struct syscall_arg *arg)
449 {
450 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
451 }
452
453 #ifndef AT_FDCWD
454 #define AT_FDCWD -100
455 #endif
456
457 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
458 struct syscall_arg *arg)
459 {
460 int fd = arg->val;
461 const char *prefix = "AT_FD";
462
463 if (fd == AT_FDCWD)
464 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
465
466 return syscall_arg__scnprintf_fd(bf, size, arg);
467 }
468
469 #define SCA_FDAT syscall_arg__scnprintf_fd_at
470
471 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
472 struct syscall_arg *arg);
473
474 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
475
476 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
477 {
478 return scnprintf(bf, size, "%#lx", arg->val);
479 }
480
481 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
482 {
483 if (arg->val == 0)
484 return scnprintf(bf, size, "NULL");
485 return syscall_arg__scnprintf_hex(bf, size, arg);
486 }
487
488 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
489 {
490 return scnprintf(bf, size, "%d", arg->val);
491 }
492
493 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
494 {
495 return scnprintf(bf, size, "%ld", arg->val);
496 }
497
498 static const char *bpf_cmd[] = {
499 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
500 "MAP_GET_NEXT_KEY", "PROG_LOAD",
501 };
502 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
503
504 static const char *fsmount_flags[] = {
505 [1] = "CLOEXEC",
506 };
507 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
508
509 #include "trace/beauty/generated/fsconfig_arrays.c"
510
511 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
512
513 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
514 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
515
516 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
517 static DEFINE_STRARRAY(itimers, "ITIMER_");
518
519 static const char *keyctl_options[] = {
520 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
521 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
522 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
523 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
524 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
525 };
526 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
527
528 static const char *whences[] = { "SET", "CUR", "END",
529 #ifdef SEEK_DATA
530 "DATA",
531 #endif
532 #ifdef SEEK_HOLE
533 "HOLE",
534 #endif
535 };
536 static DEFINE_STRARRAY(whences, "SEEK_");
537
538 static const char *fcntl_cmds[] = {
539 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
540 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
541 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
542 "GETOWNER_UIDS",
543 };
544 static DEFINE_STRARRAY(fcntl_cmds, "F_");
545
546 static const char *fcntl_linux_specific_cmds[] = {
547 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
548 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
549 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
550 };
551
552 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
553
554 static struct strarray *fcntl_cmds_arrays[] = {
555 &strarray__fcntl_cmds,
556 &strarray__fcntl_linux_specific_cmds,
557 };
558
559 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
560
561 static const char *rlimit_resources[] = {
562 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
563 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
564 "RTTIME",
565 };
566 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
567
568 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
569 static DEFINE_STRARRAY(sighow, "SIG_");
570
571 static const char *clockid[] = {
572 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
573 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
574 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
575 };
576 static DEFINE_STRARRAY(clockid, "CLOCK_");
577
578 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
579 struct syscall_arg *arg)
580 {
581 bool show_prefix = arg->show_string_prefix;
582 const char *suffix = "_OK";
583 size_t printed = 0;
584 int mode = arg->val;
585
586 if (mode == F_OK) /* 0 */
587 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
588 #define P_MODE(n) \
589 if (mode & n##_OK) { \
590 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
591 mode &= ~n##_OK; \
592 }
593
594 P_MODE(R);
595 P_MODE(W);
596 P_MODE(X);
597 #undef P_MODE
598
599 if (mode)
600 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
601
602 return printed;
603 }
604
605 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
606
607 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
608 struct syscall_arg *arg);
609
610 #define SCA_FILENAME syscall_arg__scnprintf_filename
611
612 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
613 struct syscall_arg *arg)
614 {
615 bool show_prefix = arg->show_string_prefix;
616 const char *prefix = "O_";
617 int printed = 0, flags = arg->val;
618
619 #define P_FLAG(n) \
620 if (flags & O_##n) { \
621 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
622 flags &= ~O_##n; \
623 }
624
625 P_FLAG(CLOEXEC);
626 P_FLAG(NONBLOCK);
627 #undef P_FLAG
628
629 if (flags)
630 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
631
632 return printed;
633 }
634
635 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
636
637 #ifndef GRND_NONBLOCK
638 #define GRND_NONBLOCK 0x0001
639 #endif
640 #ifndef GRND_RANDOM
641 #define GRND_RANDOM 0x0002
642 #endif
643
644 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
645 struct syscall_arg *arg)
646 {
647 bool show_prefix = arg->show_string_prefix;
648 const char *prefix = "GRND_";
649 int printed = 0, flags = arg->val;
650
651 #define P_FLAG(n) \
652 if (flags & GRND_##n) { \
653 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
654 flags &= ~GRND_##n; \
655 }
656
657 P_FLAG(RANDOM);
658 P_FLAG(NONBLOCK);
659 #undef P_FLAG
660
661 if (flags)
662 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
663
664 return printed;
665 }
666
667 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
668
669 #define STRARRAY(name, array) \
670 { .scnprintf = SCA_STRARRAY, \
671 .parm = &strarray__##array, }
672
673 #define STRARRAY_FLAGS(name, array) \
674 { .scnprintf = SCA_STRARRAY_FLAGS, \
675 .parm = &strarray__##array, }
676
677 #include "trace/beauty/arch_errno_names.c"
678 #include "trace/beauty/eventfd.c"
679 #include "trace/beauty/futex_op.c"
680 #include "trace/beauty/futex_val3.c"
681 #include "trace/beauty/mmap.c"
682 #include "trace/beauty/mode_t.c"
683 #include "trace/beauty/msg_flags.c"
684 #include "trace/beauty/open_flags.c"
685 #include "trace/beauty/perf_event_open.c"
686 #include "trace/beauty/pid.c"
687 #include "trace/beauty/sched_policy.c"
688 #include "trace/beauty/seccomp.c"
689 #include "trace/beauty/signum.c"
690 #include "trace/beauty/socket_type.c"
691 #include "trace/beauty/waitid_options.c"
692
693 struct syscall_arg_fmt {
694 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
695 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
696 void *parm;
697 const char *name;
698 bool show_zero;
699 };
700
701 static struct syscall_fmt {
702 const char *name;
703 const char *alias;
704 struct {
705 const char *sys_enter,
706 *sys_exit;
707 } bpf_prog_name;
708 struct syscall_arg_fmt arg[6];
709 u8 nr_args;
710 bool errpid;
711 bool timeout;
712 bool hexret;
713 } syscall_fmts[] = {
714 { .name = "access",
715 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
716 { .name = "arch_prctl",
717 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
718 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
719 { .name = "bind",
720 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
721 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
722 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
723 { .name = "bpf",
724 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
725 { .name = "brk", .hexret = true,
726 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
727 { .name = "clock_gettime",
728 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
729 { .name = "clone", .errpid = true, .nr_args = 5,
730 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
731 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
732 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
733 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
734 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
735 { .name = "close",
736 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
737 { .name = "connect",
738 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
739 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
740 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
741 { .name = "epoll_ctl",
742 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
743 { .name = "eventfd2",
744 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
745 { .name = "fchmodat",
746 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
747 { .name = "fchownat",
748 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
749 { .name = "fcntl",
750 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
751 .parm = &strarrays__fcntl_cmds_arrays,
752 .show_zero = true, },
753 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
754 { .name = "flock",
755 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
756 { .name = "fsconfig",
757 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
758 { .name = "fsmount",
759 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
760 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
761 { .name = "fspick",
762 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
763 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
764 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
765 { .name = "fstat", .alias = "newfstat", },
766 { .name = "fstatat", .alias = "newfstatat", },
767 { .name = "futex",
768 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
769 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
770 { .name = "futimesat",
771 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
772 { .name = "getitimer",
773 .arg = { [0] = STRARRAY(which, itimers), }, },
774 { .name = "getpid", .errpid = true, },
775 { .name = "getpgid", .errpid = true, },
776 { .name = "getppid", .errpid = true, },
777 { .name = "getrandom",
778 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
779 { .name = "getrlimit",
780 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
781 { .name = "gettid", .errpid = true, },
782 { .name = "ioctl",
783 .arg = {
784 #if defined(__i386__) || defined(__x86_64__)
785 /*
786 * FIXME: Make this available to all arches.
787 */
788 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
789 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
790 #else
791 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
792 #endif
793 { .name = "kcmp", .nr_args = 5,
794 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
795 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
796 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
797 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
798 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
799 { .name = "keyctl",
800 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
801 { .name = "kill",
802 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
803 { .name = "linkat",
804 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
805 { .name = "lseek",
806 .arg = { [2] = STRARRAY(whence, whences), }, },
807 { .name = "lstat", .alias = "newlstat", },
808 { .name = "madvise",
809 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
810 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
811 { .name = "mkdirat",
812 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
813 { .name = "mknodat",
814 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
815 { .name = "mmap", .hexret = true,
816 /* The standard mmap maps to old_mmap on s390x */
817 #if defined(__s390x__)
818 .alias = "old_mmap",
819 #endif
820 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
821 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ },
822 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
823 { .name = "mount",
824 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
825 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
826 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
827 { .name = "move_mount",
828 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
829 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
830 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
831 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
832 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
833 { .name = "mprotect",
834 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
835 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
836 { .name = "mq_unlink",
837 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
838 { .name = "mremap", .hexret = true,
839 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
840 { .name = "name_to_handle_at",
841 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
842 { .name = "newfstatat",
843 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
844 { .name = "open",
845 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
846 { .name = "open_by_handle_at",
847 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
848 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
849 { .name = "openat",
850 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
851 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
852 { .name = "perf_event_open",
853 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
854 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
855 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
856 { .name = "pipe2",
857 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
858 { .name = "pkey_alloc",
859 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
860 { .name = "pkey_free",
861 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
862 { .name = "pkey_mprotect",
863 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
864 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
865 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
866 { .name = "poll", .timeout = true, },
867 { .name = "ppoll", .timeout = true, },
868 { .name = "prctl",
869 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
870 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
871 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
872 { .name = "pread", .alias = "pread64", },
873 { .name = "preadv", .alias = "pread", },
874 { .name = "prlimit64",
875 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
876 { .name = "pwrite", .alias = "pwrite64", },
877 { .name = "readlinkat",
878 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
879 { .name = "recvfrom",
880 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
881 { .name = "recvmmsg",
882 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
883 { .name = "recvmsg",
884 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
885 { .name = "renameat",
886 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
887 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
888 { .name = "renameat2",
889 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
890 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
891 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
892 { .name = "rt_sigaction",
893 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
894 { .name = "rt_sigprocmask",
895 .arg = { [0] = STRARRAY(how, sighow), }, },
896 { .name = "rt_sigqueueinfo",
897 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
898 { .name = "rt_tgsigqueueinfo",
899 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
900 { .name = "sched_setscheduler",
901 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
902 { .name = "seccomp",
903 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
904 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
905 { .name = "select", .timeout = true, },
906 { .name = "sendfile", .alias = "sendfile64", },
907 { .name = "sendmmsg",
908 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
909 { .name = "sendmsg",
910 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
911 { .name = "sendto",
912 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
913 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
914 { .name = "set_tid_address", .errpid = true, },
915 { .name = "setitimer",
916 .arg = { [0] = STRARRAY(which, itimers), }, },
917 { .name = "setrlimit",
918 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
919 { .name = "socket",
920 .arg = { [0] = STRARRAY(family, socket_families),
921 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
922 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
923 { .name = "socketpair",
924 .arg = { [0] = STRARRAY(family, socket_families),
925 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
926 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
927 { .name = "stat", .alias = "newstat", },
928 { .name = "statx",
929 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
930 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
931 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
932 { .name = "swapoff",
933 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
934 { .name = "swapon",
935 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
936 { .name = "symlinkat",
937 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
938 { .name = "sync_file_range",
939 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
940 { .name = "tgkill",
941 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
942 { .name = "tkill",
943 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
944 { .name = "umount2", .alias = "umount",
945 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
946 { .name = "uname", .alias = "newuname", },
947 { .name = "unlinkat",
948 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
949 { .name = "utimensat",
950 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
951 { .name = "wait4", .errpid = true,
952 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
953 { .name = "waitid", .errpid = true,
954 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
955 };
956
957 static int syscall_fmt__cmp(const void *name, const void *fmtp)
958 {
959 const struct syscall_fmt *fmt = fmtp;
960 return strcmp(name, fmt->name);
961 }
962
963 static struct syscall_fmt *syscall_fmt__find(const char *name)
964 {
965 const int nmemb = ARRAY_SIZE(syscall_fmts);
966 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
967 }
968
969 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
970 {
971 int i, nmemb = ARRAY_SIZE(syscall_fmts);
972
973 for (i = 0; i < nmemb; ++i) {
974 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0)
975 return &syscall_fmts[i];
976 }
977
978 return NULL;
979 }
980
981 /*
982 * is_exit: is this "exit" or "exit_group"?
983 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
984 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
985 * nonexistent: Just a hole in the syscall table, syscall id not allocated
986 */
987 struct syscall {
988 struct tep_event *tp_format;
989 int nr_args;
990 int args_size;
991 struct {
992 struct bpf_program *sys_enter,
993 *sys_exit;
994 } bpf_prog;
995 bool is_exit;
996 bool is_open;
997 bool nonexistent;
998 struct tep_format_field *args;
999 const char *name;
1000 struct syscall_fmt *fmt;
1001 struct syscall_arg_fmt *arg_fmt;
1002 };
1003
1004 /*
1005 * Must match what is in the BPF program:
1006 *
1007 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1008 */
1009 struct bpf_map_syscall_entry {
1010 bool enabled;
1011 u16 string_args_len[6];
1012 };
1013
1014 /*
1015 * We need to have this 'calculated' boolean because in some cases we really
1016 * don't know what is the duration of a syscall, for instance, when we start
1017 * a session and some threads are waiting for a syscall to finish, say 'poll',
1018 * in which case all we can do is to print "( ? ) for duration and for the
1019 * start timestamp.
1020 */
1021 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1022 {
1023 double duration = (double)t / NSEC_PER_MSEC;
1024 size_t printed = fprintf(fp, "(");
1025
1026 if (!calculated)
1027 printed += fprintf(fp, " ");
1028 else if (duration >= 1.0)
1029 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1030 else if (duration >= 0.01)
1031 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1032 else
1033 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1034 return printed + fprintf(fp, "): ");
1035 }
1036
1037 /**
1038 * filename.ptr: The filename char pointer that will be vfs_getname'd
1039 * filename.entry_str_pos: Where to insert the string translated from
1040 * filename.ptr by the vfs_getname tracepoint/kprobe.
1041 * ret_scnprintf: syscall args may set this to a different syscall return
1042 * formatter, for instance, fcntl may return fds, file flags, etc.
1043 */
1044 struct thread_trace {
1045 u64 entry_time;
1046 bool entry_pending;
1047 unsigned long nr_events;
1048 unsigned long pfmaj, pfmin;
1049 char *entry_str;
1050 double runtime_ms;
1051 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1052 struct {
1053 unsigned long ptr;
1054 short int entry_str_pos;
1055 bool pending_open;
1056 unsigned int namelen;
1057 char *name;
1058 } filename;
1059 struct {
1060 int max;
1061 struct file *table;
1062 } files;
1063
1064 struct intlist *syscall_stats;
1065 };
1066
1067 static struct thread_trace *thread_trace__new(void)
1068 {
1069 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1070
1071 if (ttrace) {
1072 ttrace->files.max = -1;
1073 ttrace->syscall_stats = intlist__new(NULL);
1074 }
1075
1076 return ttrace;
1077 }
1078
1079 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1080 {
1081 struct thread_trace *ttrace;
1082
1083 if (thread == NULL)
1084 goto fail;
1085
1086 if (thread__priv(thread) == NULL)
1087 thread__set_priv(thread, thread_trace__new());
1088
1089 if (thread__priv(thread) == NULL)
1090 goto fail;
1091
1092 ttrace = thread__priv(thread);
1093 ++ttrace->nr_events;
1094
1095 return ttrace;
1096 fail:
1097 color_fprintf(fp, PERF_COLOR_RED,
1098 "WARNING: not enough memory, dropping samples!\n");
1099 return NULL;
1100 }
1101
1102
1103 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1104 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1105 {
1106 struct thread_trace *ttrace = thread__priv(arg->thread);
1107
1108 ttrace->ret_scnprintf = ret_scnprintf;
1109 }
1110
1111 #define TRACE_PFMAJ (1 << 0)
1112 #define TRACE_PFMIN (1 << 1)
1113
1114 static const size_t trace__entry_str_size = 2048;
1115
1116 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1117 {
1118 if (fd < 0)
1119 return NULL;
1120
1121 if (fd > ttrace->files.max) {
1122 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1123
1124 if (nfiles == NULL)
1125 return NULL;
1126
1127 if (ttrace->files.max != -1) {
1128 memset(nfiles + ttrace->files.max + 1, 0,
1129 (fd - ttrace->files.max) * sizeof(struct file));
1130 } else {
1131 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1132 }
1133
1134 ttrace->files.table = nfiles;
1135 ttrace->files.max = fd;
1136 }
1137
1138 return ttrace->files.table + fd;
1139 }
1140
1141 struct file *thread__files_entry(struct thread *thread, int fd)
1142 {
1143 return thread_trace__files_entry(thread__priv(thread), fd);
1144 }
1145
1146 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1147 {
1148 struct thread_trace *ttrace = thread__priv(thread);
1149 struct file *file = thread_trace__files_entry(ttrace, fd);
1150
1151 if (file != NULL) {
1152 struct stat st;
1153 if (stat(pathname, &st) == 0)
1154 file->dev_maj = major(st.st_rdev);
1155 file->pathname = strdup(pathname);
1156 if (file->pathname)
1157 return 0;
1158 }
1159
1160 return -1;
1161 }
1162
1163 static int thread__read_fd_path(struct thread *thread, int fd)
1164 {
1165 char linkname[PATH_MAX], pathname[PATH_MAX];
1166 struct stat st;
1167 int ret;
1168
1169 if (thread->pid_ == thread->tid) {
1170 scnprintf(linkname, sizeof(linkname),
1171 "/proc/%d/fd/%d", thread->pid_, fd);
1172 } else {
1173 scnprintf(linkname, sizeof(linkname),
1174 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1175 }
1176
1177 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1178 return -1;
1179
1180 ret = readlink(linkname, pathname, sizeof(pathname));
1181
1182 if (ret < 0 || ret > st.st_size)
1183 return -1;
1184
1185 pathname[ret] = '\0';
1186 return trace__set_fd_pathname(thread, fd, pathname);
1187 }
1188
1189 static const char *thread__fd_path(struct thread *thread, int fd,
1190 struct trace *trace)
1191 {
1192 struct thread_trace *ttrace = thread__priv(thread);
1193
1194 if (ttrace == NULL || trace->fd_path_disabled)
1195 return NULL;
1196
1197 if (fd < 0)
1198 return NULL;
1199
1200 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1201 if (!trace->live)
1202 return NULL;
1203 ++trace->stats.proc_getname;
1204 if (thread__read_fd_path(thread, fd))
1205 return NULL;
1206 }
1207
1208 return ttrace->files.table[fd].pathname;
1209 }
1210
1211 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1212 {
1213 int fd = arg->val;
1214 size_t printed = scnprintf(bf, size, "%d", fd);
1215 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1216
1217 if (path)
1218 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1219
1220 return printed;
1221 }
1222
1223 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1224 {
1225 size_t printed = scnprintf(bf, size, "%d", fd);
1226 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1227
1228 if (thread) {
1229 const char *path = thread__fd_path(thread, fd, trace);
1230
1231 if (path)
1232 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1233
1234 thread__put(thread);
1235 }
1236
1237 return printed;
1238 }
1239
1240 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1241 struct syscall_arg *arg)
1242 {
1243 int fd = arg->val;
1244 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1245 struct thread_trace *ttrace = thread__priv(arg->thread);
1246
1247 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1248 zfree(&ttrace->files.table[fd].pathname);
1249
1250 return printed;
1251 }
1252
1253 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1254 unsigned long ptr)
1255 {
1256 struct thread_trace *ttrace = thread__priv(thread);
1257
1258 ttrace->filename.ptr = ptr;
1259 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1260 }
1261
1262 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1263 {
1264 struct augmented_arg *augmented_arg = arg->augmented.args;
1265 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1266 /*
1267 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1268 * we would have two strings, each prefixed by its size.
1269 */
1270 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1271
1272 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1273 arg->augmented.size -= consumed;
1274
1275 return printed;
1276 }
1277
1278 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1279 struct syscall_arg *arg)
1280 {
1281 unsigned long ptr = arg->val;
1282
1283 if (arg->augmented.args)
1284 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1285
1286 if (!arg->trace->vfs_getname)
1287 return scnprintf(bf, size, "%#x", ptr);
1288
1289 thread__set_filename_pos(arg->thread, bf, ptr);
1290 return 0;
1291 }
1292
1293 static bool trace__filter_duration(struct trace *trace, double t)
1294 {
1295 return t < (trace->duration_filter * NSEC_PER_MSEC);
1296 }
1297
1298 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1299 {
1300 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1301
1302 return fprintf(fp, "%10.3f ", ts);
1303 }
1304
1305 /*
1306 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1307 * using ttrace->entry_time for a thread that receives a sys_exit without
1308 * first having received a sys_enter ("poll" issued before tracing session
1309 * starts, lost sys_enter exit due to ring buffer overflow).
1310 */
1311 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1312 {
1313 if (tstamp > 0)
1314 return __trace__fprintf_tstamp(trace, tstamp, fp);
1315
1316 return fprintf(fp, " ? ");
1317 }
1318
1319 static bool done = false;
1320 static bool interrupted = false;
1321
1322 static void sig_handler(int sig)
1323 {
1324 done = true;
1325 interrupted = sig == SIGINT;
1326 }
1327
1328 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1329 {
1330 size_t printed = 0;
1331
1332 if (trace->multiple_threads) {
1333 if (trace->show_comm)
1334 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1335 printed += fprintf(fp, "%d ", thread->tid);
1336 }
1337
1338 return printed;
1339 }
1340
1341 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1342 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1343 {
1344 size_t printed = 0;
1345
1346 if (trace->show_tstamp)
1347 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1348 if (trace->show_duration)
1349 printed += fprintf_duration(duration, duration_calculated, fp);
1350 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1351 }
1352
1353 static int trace__process_event(struct trace *trace, struct machine *machine,
1354 union perf_event *event, struct perf_sample *sample)
1355 {
1356 int ret = 0;
1357
1358 switch (event->header.type) {
1359 case PERF_RECORD_LOST:
1360 color_fprintf(trace->output, PERF_COLOR_RED,
1361 "LOST %" PRIu64 " events!\n", event->lost.lost);
1362 ret = machine__process_lost_event(machine, event, sample);
1363 break;
1364 default:
1365 ret = machine__process_event(machine, event, sample);
1366 break;
1367 }
1368
1369 return ret;
1370 }
1371
1372 static int trace__tool_process(struct perf_tool *tool,
1373 union perf_event *event,
1374 struct perf_sample *sample,
1375 struct machine *machine)
1376 {
1377 struct trace *trace = container_of(tool, struct trace, tool);
1378 return trace__process_event(trace, machine, event, sample);
1379 }
1380
1381 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1382 {
1383 struct machine *machine = vmachine;
1384
1385 if (machine->kptr_restrict_warned)
1386 return NULL;
1387
1388 if (symbol_conf.kptr_restrict) {
1389 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1390 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1391 "Kernel samples will not be resolved.\n");
1392 machine->kptr_restrict_warned = true;
1393 return NULL;
1394 }
1395
1396 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1397 }
1398
1399 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1400 {
1401 int err = symbol__init(NULL);
1402
1403 if (err)
1404 return err;
1405
1406 trace->host = machine__new_host();
1407 if (trace->host == NULL)
1408 return -ENOMEM;
1409
1410 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1411 if (err < 0)
1412 goto out;
1413
1414 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1415 evlist->core.threads, trace__tool_process, false,
1416 1);
1417 out:
1418 if (err)
1419 symbol__exit();
1420
1421 return err;
1422 }
1423
1424 static void trace__symbols__exit(struct trace *trace)
1425 {
1426 machine__exit(trace->host);
1427 trace->host = NULL;
1428
1429 symbol__exit();
1430 }
1431
1432 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1433 {
1434 int idx;
1435
1436 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1437 nr_args = sc->fmt->nr_args;
1438
1439 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1440 if (sc->arg_fmt == NULL)
1441 return -1;
1442
1443 for (idx = 0; idx < nr_args; ++idx) {
1444 if (sc->fmt)
1445 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1446 }
1447
1448 sc->nr_args = nr_args;
1449 return 0;
1450 }
1451
1452 static int syscall__set_arg_fmts(struct syscall *sc)
1453 {
1454 struct tep_format_field *field, *last_field = NULL;
1455 int idx = 0, len;
1456
1457 for (field = sc->args; field; field = field->next, ++idx) {
1458 last_field = field;
1459
1460 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1461 continue;
1462
1463 len = strlen(field->name);
1464
1465 if (strcmp(field->type, "const char *") == 0 &&
1466 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1467 strstr(field->name, "path") != NULL))
1468 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1469 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1470 sc->arg_fmt[idx].scnprintf = SCA_PTR;
1471 else if (strcmp(field->type, "pid_t") == 0)
1472 sc->arg_fmt[idx].scnprintf = SCA_PID;
1473 else if (strcmp(field->type, "umode_t") == 0)
1474 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1475 else if ((strcmp(field->type, "int") == 0 ||
1476 strcmp(field->type, "unsigned int") == 0 ||
1477 strcmp(field->type, "long") == 0) &&
1478 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1479 /*
1480 * /sys/kernel/tracing/events/syscalls/sys_enter*
1481 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1482 * 65 int
1483 * 23 unsigned int
1484 * 7 unsigned long
1485 */
1486 sc->arg_fmt[idx].scnprintf = SCA_FD;
1487 }
1488 }
1489
1490 if (last_field)
1491 sc->args_size = last_field->offset + last_field->size;
1492
1493 return 0;
1494 }
1495
1496 static int trace__read_syscall_info(struct trace *trace, int id)
1497 {
1498 char tp_name[128];
1499 struct syscall *sc;
1500 const char *name = syscalltbl__name(trace->sctbl, id);
1501
1502 if (trace->syscalls.table == NULL) {
1503 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1504 if (trace->syscalls.table == NULL)
1505 return -ENOMEM;
1506 }
1507
1508 sc = trace->syscalls.table + id;
1509 if (sc->nonexistent)
1510 return 0;
1511
1512 if (name == NULL) {
1513 sc->nonexistent = true;
1514 return 0;
1515 }
1516
1517 sc->name = name;
1518 sc->fmt = syscall_fmt__find(sc->name);
1519
1520 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1521 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1522
1523 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1524 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1525 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1526 }
1527
1528 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1529 return -ENOMEM;
1530
1531 if (IS_ERR(sc->tp_format))
1532 return PTR_ERR(sc->tp_format);
1533
1534 sc->args = sc->tp_format->format.fields;
1535 /*
1536 * We need to check and discard the first variable '__syscall_nr'
1537 * or 'nr' that mean the syscall number. It is needless here.
1538 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1539 */
1540 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1541 sc->args = sc->args->next;
1542 --sc->nr_args;
1543 }
1544
1545 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1546 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1547
1548 return syscall__set_arg_fmts(sc);
1549 }
1550
1551 static int intcmp(const void *a, const void *b)
1552 {
1553 const int *one = a, *another = b;
1554
1555 return *one - *another;
1556 }
1557
1558 static int trace__validate_ev_qualifier(struct trace *trace)
1559 {
1560 int err = 0;
1561 bool printed_invalid_prefix = false;
1562 struct str_node *pos;
1563 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1564
1565 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1566 sizeof(trace->ev_qualifier_ids.entries[0]));
1567
1568 if (trace->ev_qualifier_ids.entries == NULL) {
1569 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1570 trace->output);
1571 err = -EINVAL;
1572 goto out;
1573 }
1574
1575 strlist__for_each_entry(pos, trace->ev_qualifier) {
1576 const char *sc = pos->s;
1577 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1578
1579 if (id < 0) {
1580 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1581 if (id >= 0)
1582 goto matches;
1583
1584 if (!printed_invalid_prefix) {
1585 pr_debug("Skipping unknown syscalls: ");
1586 printed_invalid_prefix = true;
1587 } else {
1588 pr_debug(", ");
1589 }
1590
1591 pr_debug("%s", sc);
1592 continue;
1593 }
1594 matches:
1595 trace->ev_qualifier_ids.entries[nr_used++] = id;
1596 if (match_next == -1)
1597 continue;
1598
1599 while (1) {
1600 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1601 if (id < 0)
1602 break;
1603 if (nr_allocated == nr_used) {
1604 void *entries;
1605
1606 nr_allocated += 8;
1607 entries = realloc(trace->ev_qualifier_ids.entries,
1608 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1609 if (entries == NULL) {
1610 err = -ENOMEM;
1611 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1612 goto out_free;
1613 }
1614 trace->ev_qualifier_ids.entries = entries;
1615 }
1616 trace->ev_qualifier_ids.entries[nr_used++] = id;
1617 }
1618 }
1619
1620 trace->ev_qualifier_ids.nr = nr_used;
1621 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1622 out:
1623 if (printed_invalid_prefix)
1624 pr_debug("\n");
1625 return err;
1626 out_free:
1627 zfree(&trace->ev_qualifier_ids.entries);
1628 trace->ev_qualifier_ids.nr = 0;
1629 goto out;
1630 }
1631
1632 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1633 {
1634 bool in_ev_qualifier;
1635
1636 if (trace->ev_qualifier_ids.nr == 0)
1637 return true;
1638
1639 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1640 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1641
1642 if (in_ev_qualifier)
1643 return !trace->not_ev_qualifier;
1644
1645 return trace->not_ev_qualifier;
1646 }
1647
1648 /*
1649 * args is to be interpreted as a series of longs but we need to handle
1650 * 8-byte unaligned accesses. args points to raw_data within the event
1651 * and raw_data is guaranteed to be 8-byte unaligned because it is
1652 * preceded by raw_size which is a u32. So we need to copy args to a temp
1653 * variable to read it. Most notably this avoids extended load instructions
1654 * on unaligned addresses
1655 */
1656 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1657 {
1658 unsigned long val;
1659 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1660
1661 memcpy(&val, p, sizeof(val));
1662 return val;
1663 }
1664
1665 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1666 struct syscall_arg *arg)
1667 {
1668 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1669 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1670
1671 return scnprintf(bf, size, "arg%d: ", arg->idx);
1672 }
1673
1674 /*
1675 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1676 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1677 * in tools/perf/trace/beauty/mount_flags.c
1678 */
1679 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val)
1680 {
1681 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val)
1682 return sc->arg_fmt[arg->idx].mask_val(arg, val);
1683
1684 return val;
1685 }
1686
1687 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1688 struct syscall_arg *arg, unsigned long val)
1689 {
1690 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1691 arg->val = val;
1692 if (sc->arg_fmt[arg->idx].parm)
1693 arg->parm = sc->arg_fmt[arg->idx].parm;
1694 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1695 }
1696 return scnprintf(bf, size, "%ld", val);
1697 }
1698
1699 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1700 unsigned char *args, void *augmented_args, int augmented_args_size,
1701 struct trace *trace, struct thread *thread)
1702 {
1703 size_t printed = 0;
1704 unsigned long val;
1705 u8 bit = 1;
1706 struct syscall_arg arg = {
1707 .args = args,
1708 .augmented = {
1709 .size = augmented_args_size,
1710 .args = augmented_args,
1711 },
1712 .idx = 0,
1713 .mask = 0,
1714 .trace = trace,
1715 .thread = thread,
1716 .show_string_prefix = trace->show_string_prefix,
1717 };
1718 struct thread_trace *ttrace = thread__priv(thread);
1719
1720 /*
1721 * Things like fcntl will set this in its 'cmd' formatter to pick the
1722 * right formatter for the return value (an fd? file flags?), which is
1723 * not needed for syscalls that always return a given type, say an fd.
1724 */
1725 ttrace->ret_scnprintf = NULL;
1726
1727 if (sc->args != NULL) {
1728 struct tep_format_field *field;
1729
1730 for (field = sc->args; field;
1731 field = field->next, ++arg.idx, bit <<= 1) {
1732 if (arg.mask & bit)
1733 continue;
1734
1735 val = syscall_arg__val(&arg, arg.idx);
1736 /*
1737 * Some syscall args need some mask, most don't and
1738 * return val untouched.
1739 */
1740 val = syscall__mask_val(sc, &arg, val);
1741
1742 /*
1743 * Suppress this argument if its value is zero and
1744 * and we don't have a string associated in an
1745 * strarray for it.
1746 */
1747 if (val == 0 &&
1748 !trace->show_zeros &&
1749 !(sc->arg_fmt &&
1750 (sc->arg_fmt[arg.idx].show_zero ||
1751 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1752 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1753 sc->arg_fmt[arg.idx].parm))
1754 continue;
1755
1756 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
1757
1758 if (trace->show_arg_names)
1759 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
1760
1761 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1762 }
1763 } else if (IS_ERR(sc->tp_format)) {
1764 /*
1765 * If we managed to read the tracepoint /format file, then we
1766 * may end up not having any args, like with gettid(), so only
1767 * print the raw args when we didn't manage to read it.
1768 */
1769 while (arg.idx < sc->nr_args) {
1770 if (arg.mask & bit)
1771 goto next_arg;
1772 val = syscall_arg__val(&arg, arg.idx);
1773 if (printed)
1774 printed += scnprintf(bf + printed, size - printed, ", ");
1775 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1776 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1777 next_arg:
1778 ++arg.idx;
1779 bit <<= 1;
1780 }
1781 }
1782
1783 return printed;
1784 }
1785
1786 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
1787 union perf_event *event,
1788 struct perf_sample *sample);
1789
1790 static struct syscall *trace__syscall_info(struct trace *trace,
1791 struct evsel *evsel, int id)
1792 {
1793 int err = 0;
1794
1795 if (id < 0) {
1796
1797 /*
1798 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1799 * before that, leaving at a higher verbosity level till that is
1800 * explained. Reproduced with plain ftrace with:
1801 *
1802 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1803 * grep "NR -1 " /t/trace_pipe
1804 *
1805 * After generating some load on the machine.
1806 */
1807 if (verbose > 1) {
1808 static u64 n;
1809 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1810 id, perf_evsel__name(evsel), ++n);
1811 }
1812 return NULL;
1813 }
1814
1815 err = -EINVAL;
1816
1817 if (id > trace->sctbl->syscalls.max_id)
1818 goto out_cant_read;
1819
1820 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
1821 (err = trace__read_syscall_info(trace, id)) != 0)
1822 goto out_cant_read;
1823
1824 if (trace->syscalls.table[id].name == NULL) {
1825 if (trace->syscalls.table[id].nonexistent)
1826 return NULL;
1827 goto out_cant_read;
1828 }
1829
1830 return &trace->syscalls.table[id];
1831
1832 out_cant_read:
1833 if (verbose > 0) {
1834 char sbuf[STRERR_BUFSIZE];
1835 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
1836 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
1837 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1838 fputs(" information\n", trace->output);
1839 }
1840 return NULL;
1841 }
1842
1843 static void thread__update_stats(struct thread_trace *ttrace,
1844 int id, struct perf_sample *sample)
1845 {
1846 struct int_node *inode;
1847 struct stats *stats;
1848 u64 duration = 0;
1849
1850 inode = intlist__findnew(ttrace->syscall_stats, id);
1851 if (inode == NULL)
1852 return;
1853
1854 stats = inode->priv;
1855 if (stats == NULL) {
1856 stats = malloc(sizeof(struct stats));
1857 if (stats == NULL)
1858 return;
1859 init_stats(stats);
1860 inode->priv = stats;
1861 }
1862
1863 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1864 duration = sample->time - ttrace->entry_time;
1865
1866 update_stats(stats, duration);
1867 }
1868
1869 static int trace__printf_interrupted_entry(struct trace *trace)
1870 {
1871 struct thread_trace *ttrace;
1872 size_t printed;
1873 int len;
1874
1875 if (trace->failure_only || trace->current == NULL)
1876 return 0;
1877
1878 ttrace = thread__priv(trace->current);
1879
1880 if (!ttrace->entry_pending)
1881 return 0;
1882
1883 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1884 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
1885
1886 if (len < trace->args_alignment - 4)
1887 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
1888
1889 printed += fprintf(trace->output, " ...\n");
1890
1891 ttrace->entry_pending = false;
1892 ++trace->nr_events_printed;
1893
1894 return printed;
1895 }
1896
1897 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
1898 struct perf_sample *sample, struct thread *thread)
1899 {
1900 int printed = 0;
1901
1902 if (trace->print_sample) {
1903 double ts = (double)sample->time / NSEC_PER_MSEC;
1904
1905 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1906 perf_evsel__name(evsel), ts,
1907 thread__comm_str(thread),
1908 sample->pid, sample->tid, sample->cpu);
1909 }
1910
1911 return printed;
1912 }
1913
1914 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
1915 {
1916 void *augmented_args = NULL;
1917 /*
1918 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
1919 * and there we get all 6 syscall args plus the tracepoint common fields
1920 * that gets calculated at the start and the syscall_nr (another long).
1921 * So we check if that is the case and if so don't look after the
1922 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
1923 * which is fixed.
1924 *
1925 * We'll revisit this later to pass s->args_size to the BPF augmenter
1926 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
1927 * copies only what we need for each syscall, like what happens when we
1928 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
1929 * traffic to just what is needed for each syscall.
1930 */
1931 int args_size = raw_augmented_args_size ?: sc->args_size;
1932
1933 *augmented_args_size = sample->raw_size - args_size;
1934 if (*augmented_args_size > 0)
1935 augmented_args = sample->raw_data + args_size;
1936
1937 return augmented_args;
1938 }
1939
1940 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
1941 union perf_event *event __maybe_unused,
1942 struct perf_sample *sample)
1943 {
1944 char *msg;
1945 void *args;
1946 int printed = 0;
1947 struct thread *thread;
1948 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1949 int augmented_args_size = 0;
1950 void *augmented_args = NULL;
1951 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1952 struct thread_trace *ttrace;
1953
1954 if (sc == NULL)
1955 return -1;
1956
1957 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1958 ttrace = thread__trace(thread, trace->output);
1959 if (ttrace == NULL)
1960 goto out_put;
1961
1962 trace__fprintf_sample(trace, evsel, sample, thread);
1963
1964 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1965
1966 if (ttrace->entry_str == NULL) {
1967 ttrace->entry_str = malloc(trace__entry_str_size);
1968 if (!ttrace->entry_str)
1969 goto out_put;
1970 }
1971
1972 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1973 trace__printf_interrupted_entry(trace);
1974 /*
1975 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
1976 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
1977 * this breaks syscall__augmented_args() check for augmented args, as we calculate
1978 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
1979 * so when handling, say the openat syscall, we end up getting 6 args for the
1980 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
1981 * thinking that the extra 2 u64 args are the augmented filename, so just check
1982 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
1983 */
1984 if (evsel != trace->syscalls.events.sys_enter)
1985 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1986 ttrace->entry_time = sample->time;
1987 msg = ttrace->entry_str;
1988 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1989
1990 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1991 args, augmented_args, augmented_args_size, trace, thread);
1992
1993 if (sc->is_exit) {
1994 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1995 int alignment = 0;
1996
1997 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
1998 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
1999 if (trace->args_alignment > printed)
2000 alignment = trace->args_alignment - printed;
2001 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2002 }
2003 } else {
2004 ttrace->entry_pending = true;
2005 /* See trace__vfs_getname & trace__sys_exit */
2006 ttrace->filename.pending_open = false;
2007 }
2008
2009 if (trace->current != thread) {
2010 thread__put(trace->current);
2011 trace->current = thread__get(thread);
2012 }
2013 err = 0;
2014 out_put:
2015 thread__put(thread);
2016 return err;
2017 }
2018
2019 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2020 struct perf_sample *sample)
2021 {
2022 struct thread_trace *ttrace;
2023 struct thread *thread;
2024 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2025 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2026 char msg[1024];
2027 void *args, *augmented_args = NULL;
2028 int augmented_args_size;
2029
2030 if (sc == NULL)
2031 return -1;
2032
2033 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2034 ttrace = thread__trace(thread, trace->output);
2035 /*
2036 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2037 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2038 */
2039 if (ttrace == NULL)
2040 goto out_put;
2041
2042 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2043 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2044 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2045 fprintf(trace->output, "%s", msg);
2046 err = 0;
2047 out_put:
2048 thread__put(thread);
2049 return err;
2050 }
2051
2052 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2053 struct perf_sample *sample,
2054 struct callchain_cursor *cursor)
2055 {
2056 struct addr_location al;
2057 int max_stack = evsel->core.attr.sample_max_stack ?
2058 evsel->core.attr.sample_max_stack :
2059 trace->max_stack;
2060 int err;
2061
2062 if (machine__resolve(trace->host, &al, sample) < 0)
2063 return -1;
2064
2065 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2066 addr_location__put(&al);
2067 return err;
2068 }
2069
2070 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2071 {
2072 /* TODO: user-configurable print_opts */
2073 const unsigned int print_opts = EVSEL__PRINT_SYM |
2074 EVSEL__PRINT_DSO |
2075 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2076
2077 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
2078 }
2079
2080 static const char *errno_to_name(struct evsel *evsel, int err)
2081 {
2082 struct perf_env *env = perf_evsel__env(evsel);
2083 const char *arch_name = perf_env__arch(env);
2084
2085 return arch_syscalls__strerrno(arch_name, err);
2086 }
2087
2088 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2089 union perf_event *event __maybe_unused,
2090 struct perf_sample *sample)
2091 {
2092 long ret;
2093 u64 duration = 0;
2094 bool duration_calculated = false;
2095 struct thread *thread;
2096 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2097 int alignment = trace->args_alignment;
2098 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2099 struct thread_trace *ttrace;
2100
2101 if (sc == NULL)
2102 return -1;
2103
2104 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2105 ttrace = thread__trace(thread, trace->output);
2106 if (ttrace == NULL)
2107 goto out_put;
2108
2109 trace__fprintf_sample(trace, evsel, sample, thread);
2110
2111 if (trace->summary)
2112 thread__update_stats(ttrace, id, sample);
2113
2114 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2115
2116 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2117 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2118 ttrace->filename.pending_open = false;
2119 ++trace->stats.vfs_getname;
2120 }
2121
2122 if (ttrace->entry_time) {
2123 duration = sample->time - ttrace->entry_time;
2124 if (trace__filter_duration(trace, duration))
2125 goto out;
2126 duration_calculated = true;
2127 } else if (trace->duration_filter)
2128 goto out;
2129
2130 if (sample->callchain) {
2131 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2132 if (callchain_ret == 0) {
2133 if (callchain_cursor.nr < trace->min_stack)
2134 goto out;
2135 callchain_ret = 1;
2136 }
2137 }
2138
2139 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2140 goto out;
2141
2142 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2143
2144 if (ttrace->entry_pending) {
2145 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2146 } else {
2147 printed += fprintf(trace->output, " ... [");
2148 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2149 printed += 9;
2150 printed += fprintf(trace->output, "]: %s()", sc->name);
2151 }
2152
2153 printed++; /* the closing ')' */
2154
2155 if (alignment > printed)
2156 alignment -= printed;
2157 else
2158 alignment = 0;
2159
2160 fprintf(trace->output, ")%*s= ", alignment, " ");
2161
2162 if (sc->fmt == NULL) {
2163 if (ret < 0)
2164 goto errno_print;
2165 signed_print:
2166 fprintf(trace->output, "%ld", ret);
2167 } else if (ret < 0) {
2168 errno_print: {
2169 char bf[STRERR_BUFSIZE];
2170 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2171 *e = errno_to_name(evsel, -ret);
2172
2173 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2174 }
2175 } else if (ret == 0 && sc->fmt->timeout)
2176 fprintf(trace->output, "0 (Timeout)");
2177 else if (ttrace->ret_scnprintf) {
2178 char bf[1024];
2179 struct syscall_arg arg = {
2180 .val = ret,
2181 .thread = thread,
2182 .trace = trace,
2183 };
2184 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2185 ttrace->ret_scnprintf = NULL;
2186 fprintf(trace->output, "%s", bf);
2187 } else if (sc->fmt->hexret)
2188 fprintf(trace->output, "%#lx", ret);
2189 else if (sc->fmt->errpid) {
2190 struct thread *child = machine__find_thread(trace->host, ret, ret);
2191
2192 if (child != NULL) {
2193 fprintf(trace->output, "%ld", ret);
2194 if (child->comm_set)
2195 fprintf(trace->output, " (%s)", thread__comm_str(child));
2196 thread__put(child);
2197 }
2198 } else
2199 goto signed_print;
2200
2201 fputc('\n', trace->output);
2202
2203 /*
2204 * We only consider an 'event' for the sake of --max-events a non-filtered
2205 * sys_enter + sys_exit and other tracepoint events.
2206 */
2207 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2208 interrupted = true;
2209
2210 if (callchain_ret > 0)
2211 trace__fprintf_callchain(trace, sample);
2212 else if (callchain_ret < 0)
2213 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2214 out:
2215 ttrace->entry_pending = false;
2216 err = 0;
2217 out_put:
2218 thread__put(thread);
2219 return err;
2220 }
2221
2222 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2223 union perf_event *event __maybe_unused,
2224 struct perf_sample *sample)
2225 {
2226 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2227 struct thread_trace *ttrace;
2228 size_t filename_len, entry_str_len, to_move;
2229 ssize_t remaining_space;
2230 char *pos;
2231 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2232
2233 if (!thread)
2234 goto out;
2235
2236 ttrace = thread__priv(thread);
2237 if (!ttrace)
2238 goto out_put;
2239
2240 filename_len = strlen(filename);
2241 if (filename_len == 0)
2242 goto out_put;
2243
2244 if (ttrace->filename.namelen < filename_len) {
2245 char *f = realloc(ttrace->filename.name, filename_len + 1);
2246
2247 if (f == NULL)
2248 goto out_put;
2249
2250 ttrace->filename.namelen = filename_len;
2251 ttrace->filename.name = f;
2252 }
2253
2254 strcpy(ttrace->filename.name, filename);
2255 ttrace->filename.pending_open = true;
2256
2257 if (!ttrace->filename.ptr)
2258 goto out_put;
2259
2260 entry_str_len = strlen(ttrace->entry_str);
2261 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2262 if (remaining_space <= 0)
2263 goto out_put;
2264
2265 if (filename_len > (size_t)remaining_space) {
2266 filename += filename_len - remaining_space;
2267 filename_len = remaining_space;
2268 }
2269
2270 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2271 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2272 memmove(pos + filename_len, pos, to_move);
2273 memcpy(pos, filename, filename_len);
2274
2275 ttrace->filename.ptr = 0;
2276 ttrace->filename.entry_str_pos = 0;
2277 out_put:
2278 thread__put(thread);
2279 out:
2280 return 0;
2281 }
2282
2283 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2284 union perf_event *event __maybe_unused,
2285 struct perf_sample *sample)
2286 {
2287 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2288 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2289 struct thread *thread = machine__findnew_thread(trace->host,
2290 sample->pid,
2291 sample->tid);
2292 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2293
2294 if (ttrace == NULL)
2295 goto out_dump;
2296
2297 ttrace->runtime_ms += runtime_ms;
2298 trace->runtime_ms += runtime_ms;
2299 out_put:
2300 thread__put(thread);
2301 return 0;
2302
2303 out_dump:
2304 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2305 evsel->name,
2306 perf_evsel__strval(evsel, sample, "comm"),
2307 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2308 runtime,
2309 perf_evsel__intval(evsel, sample, "vruntime"));
2310 goto out_put;
2311 }
2312
2313 static int bpf_output__printer(enum binary_printer_ops op,
2314 unsigned int val, void *extra __maybe_unused, FILE *fp)
2315 {
2316 unsigned char ch = (unsigned char)val;
2317
2318 switch (op) {
2319 case BINARY_PRINT_CHAR_DATA:
2320 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2321 case BINARY_PRINT_DATA_BEGIN:
2322 case BINARY_PRINT_LINE_BEGIN:
2323 case BINARY_PRINT_ADDR:
2324 case BINARY_PRINT_NUM_DATA:
2325 case BINARY_PRINT_NUM_PAD:
2326 case BINARY_PRINT_SEP:
2327 case BINARY_PRINT_CHAR_PAD:
2328 case BINARY_PRINT_LINE_END:
2329 case BINARY_PRINT_DATA_END:
2330 default:
2331 break;
2332 }
2333
2334 return 0;
2335 }
2336
2337 static void bpf_output__fprintf(struct trace *trace,
2338 struct perf_sample *sample)
2339 {
2340 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2341 bpf_output__printer, NULL, trace->output);
2342 ++trace->nr_events_printed;
2343 }
2344
2345 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2346 union perf_event *event __maybe_unused,
2347 struct perf_sample *sample)
2348 {
2349 struct thread *thread;
2350 int callchain_ret = 0;
2351 /*
2352 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2353 * this event's max_events having been hit and this is an entry coming
2354 * from the ring buffer that we should discard, since the max events
2355 * have already been considered/printed.
2356 */
2357 if (evsel->disabled)
2358 return 0;
2359
2360 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2361
2362 if (sample->callchain) {
2363 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2364 if (callchain_ret == 0) {
2365 if (callchain_cursor.nr < trace->min_stack)
2366 goto out;
2367 callchain_ret = 1;
2368 }
2369 }
2370
2371 trace__printf_interrupted_entry(trace);
2372 trace__fprintf_tstamp(trace, sample->time, trace->output);
2373
2374 if (trace->trace_syscalls && trace->show_duration)
2375 fprintf(trace->output, "( ): ");
2376
2377 if (thread)
2378 trace__fprintf_comm_tid(trace, thread, trace->output);
2379
2380 if (evsel == trace->syscalls.events.augmented) {
2381 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2382 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2383
2384 if (sc) {
2385 fprintf(trace->output, "%s(", sc->name);
2386 trace__fprintf_sys_enter(trace, evsel, sample);
2387 fputc(')', trace->output);
2388 goto newline;
2389 }
2390
2391 /*
2392 * XXX: Not having the associated syscall info or not finding/adding
2393 * the thread should never happen, but if it does...
2394 * fall thru and print it as a bpf_output event.
2395 */
2396 }
2397
2398 fprintf(trace->output, "%s:", evsel->name);
2399
2400 if (perf_evsel__is_bpf_output(evsel)) {
2401 bpf_output__fprintf(trace, sample);
2402 } else if (evsel->tp_format) {
2403 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2404 trace__fprintf_sys_enter(trace, evsel, sample)) {
2405 event_format__fprintf(evsel->tp_format, sample->cpu,
2406 sample->raw_data, sample->raw_size,
2407 trace->output);
2408 ++trace->nr_events_printed;
2409
2410 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2411 evsel__disable(evsel);
2412 evsel__close(evsel);
2413 }
2414 }
2415 }
2416
2417 newline:
2418 fprintf(trace->output, "\n");
2419
2420 if (callchain_ret > 0)
2421 trace__fprintf_callchain(trace, sample);
2422 else if (callchain_ret < 0)
2423 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2424 out:
2425 thread__put(thread);
2426 return 0;
2427 }
2428
2429 static void print_location(FILE *f, struct perf_sample *sample,
2430 struct addr_location *al,
2431 bool print_dso, bool print_sym)
2432 {
2433
2434 if ((verbose > 0 || print_dso) && al->map)
2435 fprintf(f, "%s@", al->map->dso->long_name);
2436
2437 if ((verbose > 0 || print_sym) && al->sym)
2438 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2439 al->addr - al->sym->start);
2440 else if (al->map)
2441 fprintf(f, "0x%" PRIx64, al->addr);
2442 else
2443 fprintf(f, "0x%" PRIx64, sample->addr);
2444 }
2445
2446 static int trace__pgfault(struct trace *trace,
2447 struct evsel *evsel,
2448 union perf_event *event __maybe_unused,
2449 struct perf_sample *sample)
2450 {
2451 struct thread *thread;
2452 struct addr_location al;
2453 char map_type = 'd';
2454 struct thread_trace *ttrace;
2455 int err = -1;
2456 int callchain_ret = 0;
2457
2458 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2459
2460 if (sample->callchain) {
2461 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2462 if (callchain_ret == 0) {
2463 if (callchain_cursor.nr < trace->min_stack)
2464 goto out_put;
2465 callchain_ret = 1;
2466 }
2467 }
2468
2469 ttrace = thread__trace(thread, trace->output);
2470 if (ttrace == NULL)
2471 goto out_put;
2472
2473 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2474 ttrace->pfmaj++;
2475 else
2476 ttrace->pfmin++;
2477
2478 if (trace->summary_only)
2479 goto out;
2480
2481 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2482
2483 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2484
2485 fprintf(trace->output, "%sfault [",
2486 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2487 "maj" : "min");
2488
2489 print_location(trace->output, sample, &al, false, true);
2490
2491 fprintf(trace->output, "] => ");
2492
2493 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2494
2495 if (!al.map) {
2496 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2497
2498 if (al.map)
2499 map_type = 'x';
2500 else
2501 map_type = '?';
2502 }
2503
2504 print_location(trace->output, sample, &al, true, false);
2505
2506 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2507
2508 if (callchain_ret > 0)
2509 trace__fprintf_callchain(trace, sample);
2510 else if (callchain_ret < 0)
2511 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2512
2513 ++trace->nr_events_printed;
2514 out:
2515 err = 0;
2516 out_put:
2517 thread__put(thread);
2518 return err;
2519 }
2520
2521 static void trace__set_base_time(struct trace *trace,
2522 struct evsel *evsel,
2523 struct perf_sample *sample)
2524 {
2525 /*
2526 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2527 * and don't use sample->time unconditionally, we may end up having
2528 * some other event in the future without PERF_SAMPLE_TIME for good
2529 * reason, i.e. we may not be interested in its timestamps, just in
2530 * it taking place, picking some piece of information when it
2531 * appears in our event stream (vfs_getname comes to mind).
2532 */
2533 if (trace->base_time == 0 && !trace->full_time &&
2534 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2535 trace->base_time = sample->time;
2536 }
2537
2538 static int trace__process_sample(struct perf_tool *tool,
2539 union perf_event *event,
2540 struct perf_sample *sample,
2541 struct evsel *evsel,
2542 struct machine *machine __maybe_unused)
2543 {
2544 struct trace *trace = container_of(tool, struct trace, tool);
2545 struct thread *thread;
2546 int err = 0;
2547
2548 tracepoint_handler handler = evsel->handler;
2549
2550 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2551 if (thread && thread__is_filtered(thread))
2552 goto out;
2553
2554 trace__set_base_time(trace, evsel, sample);
2555
2556 if (handler) {
2557 ++trace->nr_events;
2558 handler(trace, evsel, event, sample);
2559 }
2560 out:
2561 thread__put(thread);
2562 return err;
2563 }
2564
2565 static int trace__record(struct trace *trace, int argc, const char **argv)
2566 {
2567 unsigned int rec_argc, i, j;
2568 const char **rec_argv;
2569 const char * const record_args[] = {
2570 "record",
2571 "-R",
2572 "-m", "1024",
2573 "-c", "1",
2574 };
2575
2576 const char * const sc_args[] = { "-e", };
2577 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2578 const char * const majpf_args[] = { "-e", "major-faults" };
2579 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2580 const char * const minpf_args[] = { "-e", "minor-faults" };
2581 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2582
2583 /* +1 is for the event string below */
2584 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2585 majpf_args_nr + minpf_args_nr + argc;
2586 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2587
2588 if (rec_argv == NULL)
2589 return -ENOMEM;
2590
2591 j = 0;
2592 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2593 rec_argv[j++] = record_args[i];
2594
2595 if (trace->trace_syscalls) {
2596 for (i = 0; i < sc_args_nr; i++)
2597 rec_argv[j++] = sc_args[i];
2598
2599 /* event string may be different for older kernels - e.g., RHEL6 */
2600 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2601 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2602 else if (is_valid_tracepoint("syscalls:sys_enter"))
2603 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2604 else {
2605 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2606 free(rec_argv);
2607 return -1;
2608 }
2609 }
2610
2611 if (trace->trace_pgfaults & TRACE_PFMAJ)
2612 for (i = 0; i < majpf_args_nr; i++)
2613 rec_argv[j++] = majpf_args[i];
2614
2615 if (trace->trace_pgfaults & TRACE_PFMIN)
2616 for (i = 0; i < minpf_args_nr; i++)
2617 rec_argv[j++] = minpf_args[i];
2618
2619 for (i = 0; i < (unsigned int)argc; i++)
2620 rec_argv[j++] = argv[i];
2621
2622 return cmd_record(j, rec_argv);
2623 }
2624
2625 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2626
2627 static bool evlist__add_vfs_getname(struct evlist *evlist)
2628 {
2629 bool found = false;
2630 struct evsel *evsel, *tmp;
2631 struct parse_events_error err = { .idx = 0, };
2632 int ret = parse_events(evlist, "probe:vfs_getname*", &err);
2633
2634 if (ret)
2635 return false;
2636
2637 evlist__for_each_entry_safe(evlist, evsel, tmp) {
2638 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
2639 continue;
2640
2641 if (perf_evsel__field(evsel, "pathname")) {
2642 evsel->handler = trace__vfs_getname;
2643 found = true;
2644 continue;
2645 }
2646
2647 list_del_init(&evsel->core.node);
2648 evsel->evlist = NULL;
2649 evsel__delete(evsel);
2650 }
2651
2652 return found;
2653 }
2654
2655 static struct evsel *perf_evsel__new_pgfault(u64 config)
2656 {
2657 struct evsel *evsel;
2658 struct perf_event_attr attr = {
2659 .type = PERF_TYPE_SOFTWARE,
2660 .mmap_data = 1,
2661 };
2662
2663 attr.config = config;
2664 attr.sample_period = 1;
2665
2666 event_attr_init(&attr);
2667
2668 evsel = evsel__new(&attr);
2669 if (evsel)
2670 evsel->handler = trace__pgfault;
2671
2672 return evsel;
2673 }
2674
2675 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2676 {
2677 const u32 type = event->header.type;
2678 struct evsel *evsel;
2679
2680 if (type != PERF_RECORD_SAMPLE) {
2681 trace__process_event(trace, trace->host, event, sample);
2682 return;
2683 }
2684
2685 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2686 if (evsel == NULL) {
2687 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2688 return;
2689 }
2690
2691 if (evswitch__discard(&trace->evswitch, evsel))
2692 return;
2693
2694 trace__set_base_time(trace, evsel, sample);
2695
2696 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
2697 sample->raw_data == NULL) {
2698 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2699 perf_evsel__name(evsel), sample->tid,
2700 sample->cpu, sample->raw_size);
2701 } else {
2702 tracepoint_handler handler = evsel->handler;
2703 handler(trace, evsel, event, sample);
2704 }
2705
2706 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
2707 interrupted = true;
2708 }
2709
2710 static int trace__add_syscall_newtp(struct trace *trace)
2711 {
2712 int ret = -1;
2713 struct evlist *evlist = trace->evlist;
2714 struct evsel *sys_enter, *sys_exit;
2715
2716 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
2717 if (sys_enter == NULL)
2718 goto out;
2719
2720 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2721 goto out_delete_sys_enter;
2722
2723 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
2724 if (sys_exit == NULL)
2725 goto out_delete_sys_enter;
2726
2727 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2728 goto out_delete_sys_exit;
2729
2730 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2731 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2732
2733 evlist__add(evlist, sys_enter);
2734 evlist__add(evlist, sys_exit);
2735
2736 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2737 /*
2738 * We're interested only in the user space callchain
2739 * leading to the syscall, allow overriding that for
2740 * debugging reasons using --kernel_syscall_callchains
2741 */
2742 sys_exit->core.attr.exclude_callchain_kernel = 1;
2743 }
2744
2745 trace->syscalls.events.sys_enter = sys_enter;
2746 trace->syscalls.events.sys_exit = sys_exit;
2747
2748 ret = 0;
2749 out:
2750 return ret;
2751
2752 out_delete_sys_exit:
2753 evsel__delete_priv(sys_exit);
2754 out_delete_sys_enter:
2755 evsel__delete_priv(sys_enter);
2756 goto out;
2757 }
2758
2759 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
2760 {
2761 int err = -1;
2762 struct evsel *sys_exit;
2763 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2764 trace->ev_qualifier_ids.nr,
2765 trace->ev_qualifier_ids.entries);
2766
2767 if (filter == NULL)
2768 goto out_enomem;
2769
2770 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2771 filter)) {
2772 sys_exit = trace->syscalls.events.sys_exit;
2773 err = perf_evsel__append_tp_filter(sys_exit, filter);
2774 }
2775
2776 free(filter);
2777 out:
2778 return err;
2779 out_enomem:
2780 errno = ENOMEM;
2781 goto out;
2782 }
2783
2784 #ifdef HAVE_LIBBPF_SUPPORT
2785 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
2786 {
2787 if (trace->bpf_obj == NULL)
2788 return NULL;
2789
2790 return bpf_object__find_program_by_title(trace->bpf_obj, name);
2791 }
2792
2793 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
2794 const char *prog_name, const char *type)
2795 {
2796 struct bpf_program *prog;
2797
2798 if (prog_name == NULL) {
2799 char default_prog_name[256];
2800 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
2801 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
2802 if (prog != NULL)
2803 goto out_found;
2804 if (sc->fmt && sc->fmt->alias) {
2805 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
2806 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
2807 if (prog != NULL)
2808 goto out_found;
2809 }
2810 goto out_unaugmented;
2811 }
2812
2813 prog = trace__find_bpf_program_by_title(trace, prog_name);
2814
2815 if (prog != NULL) {
2816 out_found:
2817 return prog;
2818 }
2819
2820 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
2821 prog_name, type, sc->name);
2822 out_unaugmented:
2823 return trace->syscalls.unaugmented_prog;
2824 }
2825
2826 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
2827 {
2828 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2829
2830 if (sc == NULL)
2831 return;
2832
2833 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
2834 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
2835 }
2836
2837 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
2838 {
2839 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2840 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
2841 }
2842
2843 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
2844 {
2845 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2846 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
2847 }
2848
2849 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
2850 {
2851 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2852 int arg = 0;
2853
2854 if (sc == NULL)
2855 goto out;
2856
2857 for (; arg < sc->nr_args; ++arg) {
2858 entry->string_args_len[arg] = 0;
2859 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
2860 /* Should be set like strace -s strsize */
2861 entry->string_args_len[arg] = PATH_MAX;
2862 }
2863 }
2864 out:
2865 for (; arg < 6; ++arg)
2866 entry->string_args_len[arg] = 0;
2867 }
2868 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
2869 {
2870 int fd = bpf_map__fd(trace->syscalls.map);
2871 struct bpf_map_syscall_entry value = {
2872 .enabled = !trace->not_ev_qualifier,
2873 };
2874 int err = 0;
2875 size_t i;
2876
2877 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
2878 int key = trace->ev_qualifier_ids.entries[i];
2879
2880 if (value.enabled) {
2881 trace__init_bpf_map_syscall_args(trace, key, &value);
2882 trace__init_syscall_bpf_progs(trace, key);
2883 }
2884
2885 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
2886 if (err)
2887 break;
2888 }
2889
2890 return err;
2891 }
2892
2893 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
2894 {
2895 int fd = bpf_map__fd(trace->syscalls.map);
2896 struct bpf_map_syscall_entry value = {
2897 .enabled = enabled,
2898 };
2899 int err = 0, key;
2900
2901 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
2902 if (enabled)
2903 trace__init_bpf_map_syscall_args(trace, key, &value);
2904
2905 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
2906 if (err)
2907 break;
2908 }
2909
2910 return err;
2911 }
2912
2913 static int trace__init_syscalls_bpf_map(struct trace *trace)
2914 {
2915 bool enabled = true;
2916
2917 if (trace->ev_qualifier_ids.nr)
2918 enabled = trace->not_ev_qualifier;
2919
2920 return __trace__init_syscalls_bpf_map(trace, enabled);
2921 }
2922
2923 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
2924 {
2925 struct tep_format_field *field, *candidate_field;
2926 int id;
2927
2928 /*
2929 * We're only interested in syscalls that have a pointer:
2930 */
2931 for (field = sc->args; field; field = field->next) {
2932 if (field->flags & TEP_FIELD_IS_POINTER)
2933 goto try_to_find_pair;
2934 }
2935
2936 return NULL;
2937
2938 try_to_find_pair:
2939 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
2940 struct syscall *pair = trace__syscall_info(trace, NULL, id);
2941 struct bpf_program *pair_prog;
2942 bool is_candidate = false;
2943
2944 if (pair == NULL || pair == sc ||
2945 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
2946 continue;
2947
2948 for (field = sc->args, candidate_field = pair->args;
2949 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
2950 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
2951 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
2952
2953 if (is_pointer) {
2954 if (!candidate_is_pointer) {
2955 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
2956 continue;
2957 }
2958 } else {
2959 if (candidate_is_pointer) {
2960 // The candidate might copy a pointer we don't have, skip it.
2961 goto next_candidate;
2962 }
2963 continue;
2964 }
2965
2966 if (strcmp(field->type, candidate_field->type))
2967 goto next_candidate;
2968
2969 is_candidate = true;
2970 }
2971
2972 if (!is_candidate)
2973 goto next_candidate;
2974
2975 /*
2976 * Check if the tentative pair syscall augmenter has more pointers, if it has,
2977 * then it may be collecting that and we then can't use it, as it would collect
2978 * more than what is common to the two syscalls.
2979 */
2980 if (candidate_field) {
2981 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
2982 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
2983 goto next_candidate;
2984 }
2985
2986 pair_prog = pair->bpf_prog.sys_enter;
2987 /*
2988 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
2989 * have been searched for, so search it here and if it returns the
2990 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
2991 * program for a filtered syscall on a non-filtered one.
2992 *
2993 * For instance, we have "!syscalls:sys_enter_renameat" and that is
2994 * useful for "renameat2".
2995 */
2996 if (pair_prog == NULL) {
2997 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
2998 if (pair_prog == trace->syscalls.unaugmented_prog)
2999 goto next_candidate;
3000 }
3001
3002 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3003 return pair_prog;
3004 next_candidate:
3005 continue;
3006 }
3007
3008 return NULL;
3009 }
3010
3011 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3012 {
3013 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3014 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3015 int err = 0, key;
3016
3017 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3018 int prog_fd;
3019
3020 if (!trace__syscall_enabled(trace, key))
3021 continue;
3022
3023 trace__init_syscall_bpf_progs(trace, key);
3024
3025 // It'll get at least the "!raw_syscalls:unaugmented"
3026 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3027 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3028 if (err)
3029 break;
3030 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3031 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3032 if (err)
3033 break;
3034 }
3035
3036 /*
3037 * Now lets do a second pass looking for enabled syscalls without
3038 * an augmenter that have a signature that is a superset of another
3039 * syscall with an augmenter so that we can auto-reuse it.
3040 *
3041 * I.e. if we have an augmenter for the "open" syscall that has
3042 * this signature:
3043 *
3044 * int open(const char *pathname, int flags, mode_t mode);
3045 *
3046 * I.e. that will collect just the first string argument, then we
3047 * can reuse it for the 'creat' syscall, that has this signature:
3048 *
3049 * int creat(const char *pathname, mode_t mode);
3050 *
3051 * and for:
3052 *
3053 * int stat(const char *pathname, struct stat *statbuf);
3054 * int lstat(const char *pathname, struct stat *statbuf);
3055 *
3056 * Because the 'open' augmenter will collect the first arg as a string,
3057 * and leave alone all the other args, which already helps with
3058 * beautifying 'stat' and 'lstat''s pathname arg.
3059 *
3060 * Then, in time, when 'stat' gets an augmenter that collects both
3061 * first and second arg (this one on the raw_syscalls:sys_exit prog
3062 * array tail call, then that one will be used.
3063 */
3064 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3065 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3066 struct bpf_program *pair_prog;
3067 int prog_fd;
3068
3069 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3070 continue;
3071
3072 /*
3073 * For now we're just reusing the sys_enter prog, and if it
3074 * already has an augmenter, we don't need to find one.
3075 */
3076 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3077 continue;
3078
3079 /*
3080 * Look at all the other syscalls for one that has a signature
3081 * that is close enough that we can share:
3082 */
3083 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3084 if (pair_prog == NULL)
3085 continue;
3086
3087 sc->bpf_prog.sys_enter = pair_prog;
3088
3089 /*
3090 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3091 * with the fd for the program we're reusing:
3092 */
3093 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3094 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3095 if (err)
3096 break;
3097 }
3098
3099
3100 return err;
3101 }
3102 #else
3103 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3104 {
3105 return 0;
3106 }
3107
3108 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3109 {
3110 return 0;
3111 }
3112
3113 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3114 const char *name __maybe_unused)
3115 {
3116 return NULL;
3117 }
3118
3119 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3120 {
3121 return 0;
3122 }
3123 #endif // HAVE_LIBBPF_SUPPORT
3124
3125 static int trace__set_ev_qualifier_filter(struct trace *trace)
3126 {
3127 if (trace->syscalls.map)
3128 return trace__set_ev_qualifier_bpf_filter(trace);
3129 if (trace->syscalls.events.sys_enter)
3130 return trace__set_ev_qualifier_tp_filter(trace);
3131 return 0;
3132 }
3133
3134 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3135 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3136 {
3137 int err = 0;
3138 #ifdef HAVE_LIBBPF_SUPPORT
3139 bool value = true;
3140 int map_fd = bpf_map__fd(map);
3141 size_t i;
3142
3143 for (i = 0; i < npids; ++i) {
3144 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3145 if (err)
3146 break;
3147 }
3148 #endif
3149 return err;
3150 }
3151
3152 static int trace__set_filter_loop_pids(struct trace *trace)
3153 {
3154 unsigned int nr = 1, err;
3155 pid_t pids[32] = {
3156 getpid(),
3157 };
3158 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3159
3160 while (thread && nr < ARRAY_SIZE(pids)) {
3161 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3162
3163 if (parent == NULL)
3164 break;
3165
3166 if (!strcmp(thread__comm_str(parent), "sshd") ||
3167 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3168 pids[nr++] = parent->tid;
3169 break;
3170 }
3171 thread = parent;
3172 }
3173
3174 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids);
3175 if (!err && trace->filter_pids.map)
3176 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3177
3178 return err;
3179 }
3180
3181 static int trace__set_filter_pids(struct trace *trace)
3182 {
3183 int err = 0;
3184 /*
3185 * Better not use !target__has_task() here because we need to cover the
3186 * case where no threads were specified in the command line, but a
3187 * workload was, and in that case we will fill in the thread_map when
3188 * we fork the workload in perf_evlist__prepare_workload.
3189 */
3190 if (trace->filter_pids.nr > 0) {
3191 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3192 trace->filter_pids.entries);
3193 if (!err && trace->filter_pids.map) {
3194 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3195 trace->filter_pids.entries);
3196 }
3197 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3198 err = trace__set_filter_loop_pids(trace);
3199 }
3200
3201 return err;
3202 }
3203
3204 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3205 {
3206 struct evlist *evlist = trace->evlist;
3207 struct perf_sample sample;
3208 int err;
3209
3210 err = perf_evlist__parse_sample(evlist, event, &sample);
3211 if (err)
3212 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3213 else
3214 trace__handle_event(trace, event, &sample);
3215
3216 return 0;
3217 }
3218
3219 static int __trace__flush_events(struct trace *trace)
3220 {
3221 u64 first = ordered_events__first_time(&trace->oe.data);
3222 u64 flush = trace->oe.last - NSEC_PER_SEC;
3223
3224 /* Is there some thing to flush.. */
3225 if (first && first < flush)
3226 return ordered_events__flush_time(&trace->oe.data, flush);
3227
3228 return 0;
3229 }
3230
3231 static int trace__flush_events(struct trace *trace)
3232 {
3233 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3234 }
3235
3236 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3237 {
3238 int err;
3239
3240 if (!trace->sort_events)
3241 return __trace__deliver_event(trace, event);
3242
3243 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3244 if (err && err != -1)
3245 return err;
3246
3247 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3248 if (err)
3249 return err;
3250
3251 return trace__flush_events(trace);
3252 }
3253
3254 static int ordered_events__deliver_event(struct ordered_events *oe,
3255 struct ordered_event *event)
3256 {
3257 struct trace *trace = container_of(oe, struct trace, oe.data);
3258
3259 return __trace__deliver_event(trace, event->event);
3260 }
3261
3262 static int trace__run(struct trace *trace, int argc, const char **argv)
3263 {
3264 struct evlist *evlist = trace->evlist;
3265 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3266 int err = -1, i;
3267 unsigned long before;
3268 const bool forks = argc > 0;
3269 bool draining = false;
3270
3271 trace->live = true;
3272
3273 if (!trace->raw_augmented_syscalls) {
3274 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3275 goto out_error_raw_syscalls;
3276
3277 if (trace->trace_syscalls)
3278 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3279 }
3280
3281 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3282 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3283 if (pgfault_maj == NULL)
3284 goto out_error_mem;
3285 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3286 evlist__add(evlist, pgfault_maj);
3287 }
3288
3289 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3290 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3291 if (pgfault_min == NULL)
3292 goto out_error_mem;
3293 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3294 evlist__add(evlist, pgfault_min);
3295 }
3296
3297 if (trace->sched &&
3298 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
3299 trace__sched_stat_runtime))
3300 goto out_error_sched_stat_runtime;
3301
3302 /*
3303 * If a global cgroup was set, apply it to all the events without an
3304 * explicit cgroup. I.e.:
3305 *
3306 * trace -G A -e sched:*switch
3307 *
3308 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3309 * _and_ sched:sched_switch to the 'A' cgroup, while:
3310 *
3311 * trace -e sched:*switch -G A
3312 *
3313 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3314 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3315 * a cgroup (on the root cgroup, sys wide, etc).
3316 *
3317 * Multiple cgroups:
3318 *
3319 * trace -G A -e sched:*switch -G B
3320 *
3321 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3322 * to the 'B' cgroup.
3323 *
3324 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3325 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3326 */
3327 if (trace->cgroup)
3328 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3329
3330 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3331 if (err < 0) {
3332 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3333 goto out_delete_evlist;
3334 }
3335
3336 err = trace__symbols_init(trace, evlist);
3337 if (err < 0) {
3338 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3339 goto out_delete_evlist;
3340 }
3341
3342 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3343
3344 signal(SIGCHLD, sig_handler);
3345 signal(SIGINT, sig_handler);
3346
3347 if (forks) {
3348 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3349 argv, false, NULL);
3350 if (err < 0) {
3351 fprintf(trace->output, "Couldn't run the workload!\n");
3352 goto out_delete_evlist;
3353 }
3354 }
3355
3356 err = evlist__open(evlist);
3357 if (err < 0)
3358 goto out_error_open;
3359
3360 err = bpf__apply_obj_config();
3361 if (err) {
3362 char errbuf[BUFSIZ];
3363
3364 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3365 pr_err("ERROR: Apply config to BPF failed: %s\n",
3366 errbuf);
3367 goto out_error_open;
3368 }
3369
3370 err = trace__set_filter_pids(trace);
3371 if (err < 0)
3372 goto out_error_mem;
3373
3374 if (trace->syscalls.map)
3375 trace__init_syscalls_bpf_map(trace);
3376
3377 if (trace->syscalls.prog_array.sys_enter)
3378 trace__init_syscalls_bpf_prog_array_maps(trace);
3379
3380 if (trace->ev_qualifier_ids.nr > 0) {
3381 err = trace__set_ev_qualifier_filter(trace);
3382 if (err < 0)
3383 goto out_errno;
3384
3385 if (trace->syscalls.events.sys_exit) {
3386 pr_debug("event qualifier tracepoint filter: %s\n",
3387 trace->syscalls.events.sys_exit->filter);
3388 }
3389 }
3390
3391 /*
3392 * If the "close" syscall is not traced, then we will not have the
3393 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3394 * fd->pathname table and were ending up showing the last value set by
3395 * syscalls opening a pathname and associating it with a descriptor or
3396 * reading it from /proc/pid/fd/ in cases where that doesn't make
3397 * sense.
3398 *
3399 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3400 * not in use.
3401 */
3402 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3403
3404 err = perf_evlist__apply_filters(evlist, &evsel);
3405 if (err < 0)
3406 goto out_error_apply_filters;
3407
3408 if (trace->dump.map)
3409 bpf_map__fprintf(trace->dump.map, trace->output);
3410
3411 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
3412 if (err < 0)
3413 goto out_error_mmap;
3414
3415 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3416 evlist__enable(evlist);
3417
3418 if (forks)
3419 perf_evlist__start_workload(evlist);
3420
3421 if (trace->opts.initial_delay) {
3422 usleep(trace->opts.initial_delay * 1000);
3423 evlist__enable(evlist);
3424 }
3425
3426 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3427 evlist->core.threads->nr > 1 ||
3428 perf_evlist__first(evlist)->core.attr.inherit;
3429
3430 /*
3431 * Now that we already used evsel->core.attr to ask the kernel to setup the
3432 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
3433 * trace__resolve_callchain(), allowing per-event max-stack settings
3434 * to override an explicitly set --max-stack global setting.
3435 */
3436 evlist__for_each_entry(evlist, evsel) {
3437 if (evsel__has_callchain(evsel) &&
3438 evsel->core.attr.sample_max_stack == 0)
3439 evsel->core.attr.sample_max_stack = trace->max_stack;
3440 }
3441 again:
3442 before = trace->nr_events;
3443
3444 for (i = 0; i < evlist->nr_mmaps; i++) {
3445 union perf_event *event;
3446 struct perf_mmap *md;
3447
3448 md = &evlist->mmap[i];
3449 if (perf_mmap__read_init(md) < 0)
3450 continue;
3451
3452 while ((event = perf_mmap__read_event(md)) != NULL) {
3453 ++trace->nr_events;
3454
3455 err = trace__deliver_event(trace, event);
3456 if (err)
3457 goto out_disable;
3458
3459 perf_mmap__consume(md);
3460
3461 if (interrupted)
3462 goto out_disable;
3463
3464 if (done && !draining) {
3465 evlist__disable(evlist);
3466 draining = true;
3467 }
3468 }
3469 perf_mmap__read_done(md);
3470 }
3471
3472 if (trace->nr_events == before) {
3473 int timeout = done ? 100 : -1;
3474
3475 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
3476 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
3477 draining = true;
3478
3479 goto again;
3480 } else {
3481 if (trace__flush_events(trace))
3482 goto out_disable;
3483 }
3484 } else {
3485 goto again;
3486 }
3487
3488 out_disable:
3489 thread__zput(trace->current);
3490
3491 evlist__disable(evlist);
3492
3493 if (trace->sort_events)
3494 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
3495
3496 if (!err) {
3497 if (trace->summary)
3498 trace__fprintf_thread_summary(trace, trace->output);
3499
3500 if (trace->show_tool_stats) {
3501 fprintf(trace->output, "Stats:\n "
3502 " vfs_getname : %" PRIu64 "\n"
3503 " proc_getname: %" PRIu64 "\n",
3504 trace->stats.vfs_getname,
3505 trace->stats.proc_getname);
3506 }
3507 }
3508
3509 out_delete_evlist:
3510 trace__symbols__exit(trace);
3511
3512 evlist__delete(evlist);
3513 cgroup__put(trace->cgroup);
3514 trace->evlist = NULL;
3515 trace->live = false;
3516 return err;
3517 {
3518 char errbuf[BUFSIZ];
3519
3520 out_error_sched_stat_runtime:
3521 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
3522 goto out_error;
3523
3524 out_error_raw_syscalls:
3525 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
3526 goto out_error;
3527
3528 out_error_mmap:
3529 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
3530 goto out_error;
3531
3532 out_error_open:
3533 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
3534
3535 out_error:
3536 fprintf(trace->output, "%s\n", errbuf);
3537 goto out_delete_evlist;
3538
3539 out_error_apply_filters:
3540 fprintf(trace->output,
3541 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
3542 evsel->filter, perf_evsel__name(evsel), errno,
3543 str_error_r(errno, errbuf, sizeof(errbuf)));
3544 goto out_delete_evlist;
3545 }
3546 out_error_mem:
3547 fprintf(trace->output, "Not enough memory to run!\n");
3548 goto out_delete_evlist;
3549
3550 out_errno:
3551 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
3552 goto out_delete_evlist;
3553 }
3554
3555 static int trace__replay(struct trace *trace)
3556 {
3557 const struct evsel_str_handler handlers[] = {
3558 { "probe:vfs_getname", trace__vfs_getname, },
3559 };
3560 struct perf_data data = {
3561 .path = input_name,
3562 .mode = PERF_DATA_MODE_READ,
3563 .force = trace->force,
3564 };
3565 struct perf_session *session;
3566 struct evsel *evsel;
3567 int err = -1;
3568
3569 trace->tool.sample = trace__process_sample;
3570 trace->tool.mmap = perf_event__process_mmap;
3571 trace->tool.mmap2 = perf_event__process_mmap2;
3572 trace->tool.comm = perf_event__process_comm;
3573 trace->tool.exit = perf_event__process_exit;
3574 trace->tool.fork = perf_event__process_fork;
3575 trace->tool.attr = perf_event__process_attr;
3576 trace->tool.tracing_data = perf_event__process_tracing_data;
3577 trace->tool.build_id = perf_event__process_build_id;
3578 trace->tool.namespaces = perf_event__process_namespaces;
3579
3580 trace->tool.ordered_events = true;
3581 trace->tool.ordering_requires_timestamps = true;
3582
3583 /* add tid to output */
3584 trace->multiple_threads = true;
3585
3586 session = perf_session__new(&data, false, &trace->tool);
3587 if (session == NULL)
3588 return -1;
3589
3590 if (trace->opts.target.pid)
3591 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
3592
3593 if (trace->opts.target.tid)
3594 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
3595
3596 if (symbol__init(&session->header.env) < 0)
3597 goto out;
3598
3599 trace->host = &session->machines.host;
3600
3601 err = perf_session__set_tracepoints_handlers(session, handlers);
3602 if (err)
3603 goto out;
3604
3605 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3606 "raw_syscalls:sys_enter");
3607 /* older kernels have syscalls tp versus raw_syscalls */
3608 if (evsel == NULL)
3609 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3610 "syscalls:sys_enter");
3611
3612 if (evsel &&
3613 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
3614 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
3615 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
3616 goto out;
3617 }
3618
3619 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3620 "raw_syscalls:sys_exit");
3621 if (evsel == NULL)
3622 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3623 "syscalls:sys_exit");
3624 if (evsel &&
3625 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
3626 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
3627 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
3628 goto out;
3629 }
3630
3631 evlist__for_each_entry(session->evlist, evsel) {
3632 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
3633 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
3634 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
3635 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
3636 evsel->handler = trace__pgfault;
3637 }
3638
3639 setup_pager();
3640
3641 err = perf_session__process_events(session);
3642 if (err)
3643 pr_err("Failed to process events, error %d", err);
3644
3645 else if (trace->summary)
3646 trace__fprintf_thread_summary(trace, trace->output);
3647
3648 out:
3649 perf_session__delete(session);
3650
3651 return err;
3652 }
3653
3654 static size_t trace__fprintf_threads_header(FILE *fp)
3655 {
3656 size_t printed;
3657
3658 printed = fprintf(fp, "\n Summary of events:\n\n");
3659
3660 return printed;
3661 }
3662
3663 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
3664 struct stats *stats;
3665 double msecs;
3666 int syscall;
3667 )
3668 {
3669 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
3670 struct stats *stats = source->priv;
3671
3672 entry->syscall = source->i;
3673 entry->stats = stats;
3674 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
3675 }
3676
3677 static size_t thread__dump_stats(struct thread_trace *ttrace,
3678 struct trace *trace, FILE *fp)
3679 {
3680 size_t printed = 0;
3681 struct syscall *sc;
3682 struct rb_node *nd;
3683 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
3684
3685 if (syscall_stats == NULL)
3686 return 0;
3687
3688 printed += fprintf(fp, "\n");
3689
3690 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
3691 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
3692 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
3693
3694 resort_rb__for_each_entry(nd, syscall_stats) {
3695 struct stats *stats = syscall_stats_entry->stats;
3696 if (stats) {
3697 double min = (double)(stats->min) / NSEC_PER_MSEC;
3698 double max = (double)(stats->max) / NSEC_PER_MSEC;
3699 double avg = avg_stats(stats);
3700 double pct;
3701 u64 n = (u64) stats->n;
3702
3703 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
3704 avg /= NSEC_PER_MSEC;
3705
3706 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
3707 printed += fprintf(fp, " %-15s", sc->name);
3708 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
3709 n, syscall_stats_entry->msecs, min, avg);
3710 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
3711 }
3712 }
3713
3714 resort_rb__delete(syscall_stats);
3715 printed += fprintf(fp, "\n\n");
3716
3717 return printed;
3718 }
3719
3720 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
3721 {
3722 size_t printed = 0;
3723 struct thread_trace *ttrace = thread__priv(thread);
3724 double ratio;
3725
3726 if (ttrace == NULL)
3727 return 0;
3728
3729 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
3730
3731 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
3732 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
3733 printed += fprintf(fp, "%.1f%%", ratio);
3734 if (ttrace->pfmaj)
3735 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
3736 if (ttrace->pfmin)
3737 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
3738 if (trace->sched)
3739 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
3740 else if (fputc('\n', fp) != EOF)
3741 ++printed;
3742
3743 printed += thread__dump_stats(ttrace, trace, fp);
3744
3745 return printed;
3746 }
3747
3748 static unsigned long thread__nr_events(struct thread_trace *ttrace)
3749 {
3750 return ttrace ? ttrace->nr_events : 0;
3751 }
3752
3753 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
3754 struct thread *thread;
3755 )
3756 {
3757 entry->thread = rb_entry(nd, struct thread, rb_node);
3758 }
3759
3760 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
3761 {
3762 size_t printed = trace__fprintf_threads_header(fp);
3763 struct rb_node *nd;
3764 int i;
3765
3766 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
3767 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
3768
3769 if (threads == NULL) {
3770 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
3771 return 0;
3772 }
3773
3774 resort_rb__for_each_entry(nd, threads)
3775 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
3776
3777 resort_rb__delete(threads);
3778 }
3779 return printed;
3780 }
3781
3782 static int trace__set_duration(const struct option *opt, const char *str,
3783 int unset __maybe_unused)
3784 {
3785 struct trace *trace = opt->value;
3786
3787 trace->duration_filter = atof(str);
3788 return 0;
3789 }
3790
3791 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
3792 int unset __maybe_unused)
3793 {
3794 int ret = -1;
3795 size_t i;
3796 struct trace *trace = opt->value;
3797 /*
3798 * FIXME: introduce a intarray class, plain parse csv and create a
3799 * { int nr, int entries[] } struct...
3800 */
3801 struct intlist *list = intlist__new(str);
3802
3803 if (list == NULL)
3804 return -1;
3805
3806 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
3807 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
3808
3809 if (trace->filter_pids.entries == NULL)
3810 goto out;
3811
3812 trace->filter_pids.entries[0] = getpid();
3813
3814 for (i = 1; i < trace->filter_pids.nr; ++i)
3815 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
3816
3817 intlist__delete(list);
3818 ret = 0;
3819 out:
3820 return ret;
3821 }
3822
3823 static int trace__open_output(struct trace *trace, const char *filename)
3824 {
3825 struct stat st;
3826
3827 if (!stat(filename, &st) && st.st_size) {
3828 char oldname[PATH_MAX];
3829
3830 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
3831 unlink(oldname);
3832 rename(filename, oldname);
3833 }
3834
3835 trace->output = fopen(filename, "w");
3836
3837 return trace->output == NULL ? -errno : 0;
3838 }
3839
3840 static int parse_pagefaults(const struct option *opt, const char *str,
3841 int unset __maybe_unused)
3842 {
3843 int *trace_pgfaults = opt->value;
3844
3845 if (strcmp(str, "all") == 0)
3846 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
3847 else if (strcmp(str, "maj") == 0)
3848 *trace_pgfaults |= TRACE_PFMAJ;
3849 else if (strcmp(str, "min") == 0)
3850 *trace_pgfaults |= TRACE_PFMIN;
3851 else
3852 return -1;
3853
3854 return 0;
3855 }
3856
3857 static void evlist__set_evsel_handler(struct evlist *evlist, void *handler)
3858 {
3859 struct evsel *evsel;
3860
3861 evlist__for_each_entry(evlist, evsel)
3862 evsel->handler = handler;
3863 }
3864
3865 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
3866 {
3867 struct evsel *evsel;
3868
3869 evlist__for_each_entry(evlist, evsel) {
3870 if (evsel->priv || !evsel->tp_format)
3871 continue;
3872
3873 if (strcmp(evsel->tp_format->system, "syscalls"))
3874 continue;
3875
3876 if (perf_evsel__init_syscall_tp(evsel))
3877 return -1;
3878
3879 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
3880 struct syscall_tp *sc = evsel->priv;
3881
3882 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
3883 return -1;
3884 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
3885 struct syscall_tp *sc = evsel->priv;
3886
3887 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
3888 return -1;
3889 }
3890 }
3891
3892 return 0;
3893 }
3894
3895 /*
3896 * XXX: Hackish, just splitting the combined -e+--event (syscalls
3897 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
3898 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
3899 *
3900 * It'd be better to introduce a parse_options() variant that would return a
3901 * list with the terms it didn't match to an event...
3902 */
3903 static int trace__parse_events_option(const struct option *opt, const char *str,
3904 int unset __maybe_unused)
3905 {
3906 struct trace *trace = (struct trace *)opt->value;
3907 const char *s = str;
3908 char *sep = NULL, *lists[2] = { NULL, NULL, };
3909 int len = strlen(str) + 1, err = -1, list, idx;
3910 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
3911 char group_name[PATH_MAX];
3912 struct syscall_fmt *fmt;
3913
3914 if (strace_groups_dir == NULL)
3915 return -1;
3916
3917 if (*s == '!') {
3918 ++s;
3919 trace->not_ev_qualifier = true;
3920 }
3921
3922 while (1) {
3923 if ((sep = strchr(s, ',')) != NULL)
3924 *sep = '\0';
3925
3926 list = 0;
3927 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
3928 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
3929 list = 1;
3930 goto do_concat;
3931 }
3932
3933 fmt = syscall_fmt__find_by_alias(s);
3934 if (fmt != NULL) {
3935 list = 1;
3936 s = fmt->name;
3937 } else {
3938 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
3939 if (access(group_name, R_OK) == 0)
3940 list = 1;
3941 }
3942 do_concat:
3943 if (lists[list]) {
3944 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
3945 } else {
3946 lists[list] = malloc(len);
3947 if (lists[list] == NULL)
3948 goto out;
3949 strcpy(lists[list], s);
3950 }
3951
3952 if (!sep)
3953 break;
3954
3955 *sep = ',';
3956 s = sep + 1;
3957 }
3958
3959 if (lists[1] != NULL) {
3960 struct strlist_config slist_config = {
3961 .dirname = strace_groups_dir,
3962 };
3963
3964 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
3965 if (trace->ev_qualifier == NULL) {
3966 fputs("Not enough memory to parse event qualifier", trace->output);
3967 goto out;
3968 }
3969
3970 if (trace__validate_ev_qualifier(trace))
3971 goto out;
3972 trace->trace_syscalls = true;
3973 }
3974
3975 err = 0;
3976
3977 if (lists[0]) {
3978 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3979 "event selector. use 'perf list' to list available events",
3980 parse_events_option);
3981 err = parse_events_option(&o, lists[0], 0);
3982 }
3983 out:
3984 if (sep)
3985 *sep = ',';
3986
3987 return err;
3988 }
3989
3990 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3991 {
3992 struct trace *trace = opt->value;
3993
3994 if (!list_empty(&trace->evlist->core.entries))
3995 return parse_cgroups(opt, str, unset);
3996
3997 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
3998
3999 return 0;
4000 }
4001
4002 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
4003 {
4004 if (trace->bpf_obj == NULL)
4005 return NULL;
4006
4007 return bpf_object__find_map_by_name(trace->bpf_obj, name);
4008 }
4009
4010 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
4011 {
4012 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
4013 }
4014
4015 static void trace__set_bpf_map_syscalls(struct trace *trace)
4016 {
4017 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
4018 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
4019 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
4020 }
4021
4022 static int trace__config(const char *var, const char *value, void *arg)
4023 {
4024 struct trace *trace = arg;
4025 int err = 0;
4026
4027 if (!strcmp(var, "trace.add_events")) {
4028 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4029 "event selector. use 'perf list' to list available events",
4030 parse_events_option);
4031 /*
4032 * We can't propagate parse_event_option() return, as it is 1
4033 * for failure while perf_config() expects -1.
4034 */
4035 if (parse_events_option(&o, value, 0))
4036 err = -1;
4037 } else if (!strcmp(var, "trace.show_timestamp")) {
4038 trace->show_tstamp = perf_config_bool(var, value);
4039 } else if (!strcmp(var, "trace.show_duration")) {
4040 trace->show_duration = perf_config_bool(var, value);
4041 } else if (!strcmp(var, "trace.show_arg_names")) {
4042 trace->show_arg_names = perf_config_bool(var, value);
4043 if (!trace->show_arg_names)
4044 trace->show_zeros = true;
4045 } else if (!strcmp(var, "trace.show_zeros")) {
4046 bool new_show_zeros = perf_config_bool(var, value);
4047 if (!trace->show_arg_names && !new_show_zeros) {
4048 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4049 goto out;
4050 }
4051 trace->show_zeros = new_show_zeros;
4052 } else if (!strcmp(var, "trace.show_prefix")) {
4053 trace->show_string_prefix = perf_config_bool(var, value);
4054 } else if (!strcmp(var, "trace.no_inherit")) {
4055 trace->opts.no_inherit = perf_config_bool(var, value);
4056 } else if (!strcmp(var, "trace.args_alignment")) {
4057 int args_alignment = 0;
4058 if (perf_config_int(&args_alignment, var, value) == 0)
4059 trace->args_alignment = args_alignment;
4060 }
4061 out:
4062 return err;
4063 }
4064
4065 int cmd_trace(int argc, const char **argv)
4066 {
4067 const char *trace_usage[] = {
4068 "perf trace [<options>] [<command>]",
4069 "perf trace [<options>] -- <command> [<options>]",
4070 "perf trace record [<options>] [<command>]",
4071 "perf trace record [<options>] -- <command> [<options>]",
4072 NULL
4073 };
4074 struct trace trace = {
4075 .opts = {
4076 .target = {
4077 .uid = UINT_MAX,
4078 .uses_mmap = true,
4079 },
4080 .user_freq = UINT_MAX,
4081 .user_interval = ULLONG_MAX,
4082 .no_buffering = true,
4083 .mmap_pages = UINT_MAX,
4084 },
4085 .output = stderr,
4086 .show_comm = true,
4087 .show_tstamp = true,
4088 .show_duration = true,
4089 .show_arg_names = true,
4090 .args_alignment = 70,
4091 .trace_syscalls = false,
4092 .kernel_syscallchains = false,
4093 .max_stack = UINT_MAX,
4094 .max_events = ULONG_MAX,
4095 };
4096 const char *map_dump_str = NULL;
4097 const char *output_name = NULL;
4098 const struct option trace_options[] = {
4099 OPT_CALLBACK('e', "event", &trace, "event",
4100 "event/syscall selector. use 'perf list' to list available events",
4101 trace__parse_events_option),
4102 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4103 "show the thread COMM next to its id"),
4104 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4105 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4106 trace__parse_events_option),
4107 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4108 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4109 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4110 "trace events on existing process id"),
4111 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4112 "trace events on existing thread id"),
4113 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4114 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4115 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4116 "system-wide collection from all CPUs"),
4117 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4118 "list of cpus to monitor"),
4119 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4120 "child tasks do not inherit counters"),
4121 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4122 "number of mmap data pages",
4123 perf_evlist__parse_mmap_pages),
4124 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4125 "user to profile"),
4126 OPT_CALLBACK(0, "duration", &trace, "float",
4127 "show only events with duration > N.M ms",
4128 trace__set_duration),
4129 #ifdef HAVE_LIBBPF_SUPPORT
4130 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4131 #endif
4132 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4133 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4134 OPT_BOOLEAN('T', "time", &trace.full_time,
4135 "Show full timestamp, not time relative to first start"),
4136 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4137 "Show only syscalls that failed"),
4138 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4139 "Show only syscall summary with statistics"),
4140 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4141 "Show all syscalls and summary with statistics"),
4142 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4143 "Trace pagefaults", parse_pagefaults, "maj"),
4144 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4145 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4146 OPT_CALLBACK(0, "call-graph", &trace.opts,
4147 "record_mode[,record_size]", record_callchain_help,
4148 &record_parse_callchain_opt),
4149 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4150 "Show the kernel callchains on the syscall exit path"),
4151 OPT_ULONG(0, "max-events", &trace.max_events,
4152 "Set the maximum number of events to print, exit after that is reached. "),
4153 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4154 "Set the minimum stack depth when parsing the callchain, "
4155 "anything below the specified depth will be ignored."),
4156 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4157 "Set the maximum stack depth when parsing the callchain, "
4158 "anything beyond the specified depth will be ignored. "
4159 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4160 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4161 "Sort batch of events before processing, use if getting out of order events"),
4162 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4163 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4164 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4165 "per thread proc mmap processing timeout in ms"),
4166 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4167 trace__parse_cgroups),
4168 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
4169 "ms to wait before starting measurement after program "
4170 "start"),
4171 OPTS_EVSWITCH(&trace.evswitch),
4172 OPT_END()
4173 };
4174 bool __maybe_unused max_stack_user_set = true;
4175 bool mmap_pages_user_set = true;
4176 struct evsel *evsel;
4177 const char * const trace_subcommands[] = { "record", NULL };
4178 int err = -1;
4179 char bf[BUFSIZ];
4180
4181 signal(SIGSEGV, sighandler_dump_stack);
4182 signal(SIGFPE, sighandler_dump_stack);
4183
4184 trace.evlist = evlist__new();
4185 trace.sctbl = syscalltbl__new();
4186
4187 if (trace.evlist == NULL || trace.sctbl == NULL) {
4188 pr_err("Not enough memory to run!\n");
4189 err = -ENOMEM;
4190 goto out;
4191 }
4192
4193 /*
4194 * Parsing .perfconfig may entail creating a BPF event, that may need
4195 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4196 * is too small. This affects just this process, not touching the
4197 * global setting. If it fails we'll get something in 'perf trace -v'
4198 * to help diagnose the problem.
4199 */
4200 rlimit__bump_memlock();
4201
4202 err = perf_config(trace__config, &trace);
4203 if (err)
4204 goto out;
4205
4206 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4207 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4208
4209 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4210 usage_with_options_msg(trace_usage, trace_options,
4211 "cgroup monitoring only available in system-wide mode");
4212 }
4213
4214 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4215 if (IS_ERR(evsel)) {
4216 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4217 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4218 goto out;
4219 }
4220
4221 if (evsel) {
4222 trace.syscalls.events.augmented = evsel;
4223
4224 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4225 if (evsel == NULL) {
4226 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4227 goto out;
4228 }
4229
4230 if (evsel->bpf_obj == NULL) {
4231 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4232 goto out;
4233 }
4234
4235 trace.bpf_obj = evsel->bpf_obj;
4236
4237 trace__set_bpf_map_filtered_pids(&trace);
4238 trace__set_bpf_map_syscalls(&trace);
4239 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4240 }
4241
4242 err = bpf__setup_stdout(trace.evlist);
4243 if (err) {
4244 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4245 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4246 goto out;
4247 }
4248
4249 err = -1;
4250
4251 if (map_dump_str) {
4252 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4253 if (trace.dump.map == NULL) {
4254 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4255 goto out;
4256 }
4257 }
4258
4259 if (trace.trace_pgfaults) {
4260 trace.opts.sample_address = true;
4261 trace.opts.sample_time = true;
4262 }
4263
4264 if (trace.opts.mmap_pages == UINT_MAX)
4265 mmap_pages_user_set = false;
4266
4267 if (trace.max_stack == UINT_MAX) {
4268 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4269 max_stack_user_set = false;
4270 }
4271
4272 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4273 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4274 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4275 }
4276 #endif
4277
4278 if (callchain_param.enabled) {
4279 if (!mmap_pages_user_set && geteuid() == 0)
4280 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4281
4282 symbol_conf.use_callchain = true;
4283 }
4284
4285 if (trace.evlist->core.nr_entries > 0) {
4286 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
4287 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4288 perror("failed to set syscalls:* tracepoint fields");
4289 goto out;
4290 }
4291 }
4292
4293 if (trace.sort_events) {
4294 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4295 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4296 }
4297
4298 /*
4299 * If we are augmenting syscalls, then combine what we put in the
4300 * __augmented_syscalls__ BPF map with what is in the
4301 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4302 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4303 *
4304 * We'll switch to look at two BPF maps, one for sys_enter and the
4305 * other for sys_exit when we start augmenting the sys_exit paths with
4306 * buffers that are being copied from kernel to userspace, think 'read'
4307 * syscall.
4308 */
4309 if (trace.syscalls.events.augmented) {
4310 evlist__for_each_entry(trace.evlist, evsel) {
4311 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4312
4313 if (raw_syscalls_sys_exit) {
4314 trace.raw_augmented_syscalls = true;
4315 goto init_augmented_syscall_tp;
4316 }
4317
4318 if (trace.syscalls.events.augmented->priv == NULL &&
4319 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
4320 struct evsel *augmented = trace.syscalls.events.augmented;
4321 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
4322 perf_evsel__init_augmented_syscall_tp_args(augmented))
4323 goto out;
4324 /*
4325 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
4326 * Above we made sure we can get from the payload the tp fields
4327 * that we get from syscalls:sys_enter tracefs format file.
4328 */
4329 augmented->handler = trace__sys_enter;
4330 /*
4331 * Now we do the same for the *syscalls:sys_enter event so that
4332 * if we handle it directly, i.e. if the BPF prog returns 0 so
4333 * as not to filter it, then we'll handle it just like we would
4334 * for the BPF_OUTPUT one:
4335 */
4336 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) ||
4337 perf_evsel__init_augmented_syscall_tp_args(evsel))
4338 goto out;
4339 evsel->handler = trace__sys_enter;
4340 }
4341
4342 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
4343 struct syscall_tp *sc;
4344 init_augmented_syscall_tp:
4345 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
4346 goto out;
4347 sc = evsel->priv;
4348 /*
4349 * For now with BPF raw_augmented we hook into
4350 * raw_syscalls:sys_enter and there we get all
4351 * 6 syscall args plus the tracepoint common
4352 * fields and the syscall_nr (another long).
4353 * So we check if that is the case and if so
4354 * don't look after the sc->args_size but
4355 * always after the full raw_syscalls:sys_enter
4356 * payload, which is fixed.
4357 *
4358 * We'll revisit this later to pass
4359 * s->args_size to the BPF augmenter (now
4360 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
4361 * so that it copies only what we need for each
4362 * syscall, like what happens when we use
4363 * syscalls:sys_enter_NAME, so that we reduce
4364 * the kernel/userspace traffic to just what is
4365 * needed for each syscall.
4366 */
4367 if (trace.raw_augmented_syscalls)
4368 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
4369 perf_evsel__init_augmented_syscall_tp_ret(evsel);
4370 evsel->handler = trace__sys_exit;
4371 }
4372 }
4373 }
4374
4375 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
4376 return trace__record(&trace, argc-1, &argv[1]);
4377
4378 /* summary_only implies summary option, but don't overwrite summary if set */
4379 if (trace.summary_only)
4380 trace.summary = trace.summary_only;
4381
4382 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4383 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4384 trace.trace_syscalls = true;
4385 }
4386
4387 if (output_name != NULL) {
4388 err = trace__open_output(&trace, output_name);
4389 if (err < 0) {
4390 perror("failed to create output file");
4391 goto out;
4392 }
4393 }
4394
4395 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
4396 if (err)
4397 goto out_close;
4398
4399 err = target__validate(&trace.opts.target);
4400 if (err) {
4401 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4402 fprintf(trace.output, "%s", bf);
4403 goto out_close;
4404 }
4405
4406 err = target__parse_uid(&trace.opts.target);
4407 if (err) {
4408 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4409 fprintf(trace.output, "%s", bf);
4410 goto out_close;
4411 }
4412
4413 if (!argc && target__none(&trace.opts.target))
4414 trace.opts.target.system_wide = true;
4415
4416 if (input_name)
4417 err = trace__replay(&trace);
4418 else
4419 err = trace__run(&trace, argc, argv);
4420
4421 out_close:
4422 if (output_name != NULL)
4423 fclose(trace.output);
4424 out:
4425 return err;
4426 }
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