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Linux 5.7.7
[linux/fpc-iii.git] / tools / perf / builtin-trace.c
blob01d542007c8b1210b9fbf348bfb8ccafb849c645
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/evsel.h"
32 #include "util/evsel_fprintf.h"
33 #include "util/synthetic-events.h"
34 #include "util/evlist.h"
35 #include "util/evswitch.h"
36 #include "util/mmap.h"
37 #include <subcmd/pager.h>
38 #include <subcmd/exec-cmd.h>
39 #include "util/machine.h"
40 #include "util/map.h"
41 #include "util/symbol.h"
42 #include "util/path.h"
43 #include "util/session.h"
44 #include "util/thread.h"
45 #include <subcmd/parse-options.h>
46 #include "util/strlist.h"
47 #include "util/intlist.h"
48 #include "util/thread_map.h"
49 #include "util/stat.h"
50 #include "util/tool.h"
51 #include "util/util.h"
52 #include "trace/beauty/beauty.h"
53 #include "trace-event.h"
54 #include "util/parse-events.h"
55 #include "util/bpf-loader.h"
56 #include "callchain.h"
57 #include "print_binary.h"
58 #include "string2.h"
59 #include "syscalltbl.h"
60 #include "rb_resort.h"
61 #include "../perf.h"
62
63 #include <errno.h>
64 #include <inttypes.h>
65 #include <poll.h>
66 #include <signal.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <linux/err.h>
70 #include <linux/filter.h>
71 #include <linux/kernel.h>
72 #include <linux/random.h>
73 #include <linux/stringify.h>
74 #include <linux/time64.h>
75 #include <linux/zalloc.h>
76 #include <fcntl.h>
77 #include <sys/sysmacros.h>
78
79 #include <linux/ctype.h>
80 #include <perf/mmap.h>
81
82 #ifndef O_CLOEXEC
83 # define O_CLOEXEC 02000000
84 #endif
85
86 #ifndef F_LINUX_SPECIFIC_BASE
87 # define F_LINUX_SPECIFIC_BASE 1024
88 #endif
89
90 /*
91 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
92 */
93 struct syscall_arg_fmt {
94 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
95 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
96 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
97 void *parm;
98 const char *name;
99 u16 nr_entries; // for arrays
100 bool show_zero;
101 };
102
103 struct syscall_fmt {
104 const char *name;
105 const char *alias;
106 struct {
107 const char *sys_enter,
108 *sys_exit;
109 } bpf_prog_name;
110 struct syscall_arg_fmt arg[6];
111 u8 nr_args;
112 bool errpid;
113 bool timeout;
114 bool hexret;
115 };
116
117 struct trace {
118 struct perf_tool tool;
119 struct syscalltbl *sctbl;
120 struct {
121 struct syscall *table;
122 struct bpf_map *map;
123 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
124 struct bpf_map *sys_enter,
125 *sys_exit;
126 } prog_array;
127 struct {
128 struct evsel *sys_enter,
129 *sys_exit,
130 *augmented;
131 } events;
132 struct bpf_program *unaugmented_prog;
133 } syscalls;
134 struct {
135 struct bpf_map *map;
136 } dump;
137 struct record_opts opts;
138 struct evlist *evlist;
139 struct machine *host;
140 struct thread *current;
141 struct bpf_object *bpf_obj;
142 struct cgroup *cgroup;
143 u64 base_time;
144 FILE *output;
145 unsigned long nr_events;
146 unsigned long nr_events_printed;
147 unsigned long max_events;
148 struct evswitch evswitch;
149 struct strlist *ev_qualifier;
150 struct {
151 size_t nr;
152 int *entries;
153 } ev_qualifier_ids;
154 struct {
155 size_t nr;
156 pid_t *entries;
157 struct bpf_map *map;
158 } filter_pids;
159 double duration_filter;
160 double runtime_ms;
161 struct {
162 u64 vfs_getname,
163 proc_getname;
164 } stats;
165 unsigned int max_stack;
166 unsigned int min_stack;
167 int raw_augmented_syscalls_args_size;
168 bool raw_augmented_syscalls;
169 bool fd_path_disabled;
170 bool sort_events;
171 bool not_ev_qualifier;
172 bool live;
173 bool full_time;
174 bool sched;
175 bool multiple_threads;
176 bool summary;
177 bool summary_only;
178 bool errno_summary;
179 bool failure_only;
180 bool show_comm;
181 bool print_sample;
182 bool show_tool_stats;
183 bool trace_syscalls;
184 bool libtraceevent_print;
185 bool kernel_syscallchains;
186 s16 args_alignment;
187 bool show_tstamp;
188 bool show_duration;
189 bool show_zeros;
190 bool show_arg_names;
191 bool show_string_prefix;
192 bool force;
193 bool vfs_getname;
194 int trace_pgfaults;
195 char *perfconfig_events;
196 struct {
197 struct ordered_events data;
198 u64 last;
199 } oe;
200 };
201
202 struct tp_field {
203 int offset;
204 union {
205 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
206 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
207 };
208 };
209
210 #define TP_UINT_FIELD(bits) \
211 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
212 { \
213 u##bits value; \
214 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
215 return value; \
216 }
217
218 TP_UINT_FIELD(8);
219 TP_UINT_FIELD(16);
220 TP_UINT_FIELD(32);
221 TP_UINT_FIELD(64);
222
223 #define TP_UINT_FIELD__SWAPPED(bits) \
224 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
225 { \
226 u##bits value; \
227 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
228 return bswap_##bits(value);\
229 }
230
231 TP_UINT_FIELD__SWAPPED(16);
232 TP_UINT_FIELD__SWAPPED(32);
233 TP_UINT_FIELD__SWAPPED(64);
234
235 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
236 {
237 field->offset = offset;
238
239 switch (size) {
240 case 1:
241 field->integer = tp_field__u8;
242 break;
243 case 2:
244 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
245 break;
246 case 4:
247 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
248 break;
249 case 8:
250 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
251 break;
252 default:
253 return -1;
254 }
255
256 return 0;
257 }
258
259 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
260 {
261 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
262 }
263
264 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
265 {
266 return sample->raw_data + field->offset;
267 }
268
269 static int __tp_field__init_ptr(struct tp_field *field, int offset)
270 {
271 field->offset = offset;
272 field->pointer = tp_field__ptr;
273 return 0;
274 }
275
276 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
277 {
278 return __tp_field__init_ptr(field, format_field->offset);
279 }
280
281 struct syscall_tp {
282 struct tp_field id;
283 union {
284 struct tp_field args, ret;
285 };
286 };
287
288 /*
289 * The evsel->priv as used by 'perf trace'
290 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
291 * fmt: for all the other tracepoints
292 */
293 struct evsel_trace {
294 struct syscall_tp sc;
295 struct syscall_arg_fmt *fmt;
296 };
297
298 static struct evsel_trace *evsel_trace__new(void)
299 {
300 return zalloc(sizeof(struct evsel_trace));
301 }
302
303 static void evsel_trace__delete(struct evsel_trace *et)
304 {
305 if (et == NULL)
306 return;
307
308 zfree(&et->fmt);
309 free(et);
310 }
311
312 /*
313 * Used with raw_syscalls:sys_{enter,exit} and with the
314 * syscalls:sys_{enter,exit}_SYSCALL tracepoints
315 */
316 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
317 {
318 struct evsel_trace *et = evsel->priv;
319
320 return &et->sc;
321 }
322
323 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
324 {
325 if (evsel->priv == NULL) {
326 evsel->priv = evsel_trace__new();
327 if (evsel->priv == NULL)
328 return NULL;
329 }
330
331 return __evsel__syscall_tp(evsel);
332 }
333
334 /*
335 * Used with all the other tracepoints.
336 */
337 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
338 {
339 struct evsel_trace *et = evsel->priv;
340
341 return et->fmt;
342 }
343
344 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
345 {
346 struct evsel_trace *et = evsel->priv;
347
348 if (evsel->priv == NULL) {
349 et = evsel->priv = evsel_trace__new();
350
351 if (et == NULL)
352 return NULL;
353 }
354
355 if (et->fmt == NULL) {
356 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
357 if (et->fmt == NULL)
358 goto out_delete;
359 }
360
361 return __evsel__syscall_arg_fmt(evsel);
362
363 out_delete:
364 evsel_trace__delete(evsel->priv);
365 evsel->priv = NULL;
366 return NULL;
367 }
368
369 static int perf_evsel__init_tp_uint_field(struct evsel *evsel,
370 struct tp_field *field,
371 const char *name)
372 {
373 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
374
375 if (format_field == NULL)
376 return -1;
377
378 return tp_field__init_uint(field, format_field, evsel->needs_swap);
379 }
380
381 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
382 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
383 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
384
385 static int perf_evsel__init_tp_ptr_field(struct evsel *evsel,
386 struct tp_field *field,
387 const char *name)
388 {
389 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
390
391 if (format_field == NULL)
392 return -1;
393
394 return tp_field__init_ptr(field, format_field);
395 }
396
397 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
398 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
399 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
400
401 static void evsel__delete_priv(struct evsel *evsel)
402 {
403 zfree(&evsel->priv);
404 evsel__delete(evsel);
405 }
406
407 static int perf_evsel__init_syscall_tp(struct evsel *evsel)
408 {
409 struct syscall_tp *sc = evsel__syscall_tp(evsel);
410
411 if (sc != NULL) {
412 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
413 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
414 return -ENOENT;
415 return 0;
416 }
417
418 return -ENOMEM;
419 }
420
421 static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
422 {
423 struct syscall_tp *sc = evsel__syscall_tp(evsel);
424
425 if (sc != NULL) {
426 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
427 if (syscall_id == NULL)
428 syscall_id = perf_evsel__field(tp, "__syscall_nr");
429 if (syscall_id == NULL ||
430 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
431 return -EINVAL;
432
433 return 0;
434 }
435
436 return -ENOMEM;
437 }
438
439 static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
440 {
441 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
442
443 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
444 }
445
446 static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
447 {
448 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
449
450 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
451 }
452
453 static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
454 {
455 if (evsel__syscall_tp(evsel) != NULL) {
456 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
457 return -ENOENT;
458
459 evsel->handler = handler;
460 return 0;
461 }
462
463 return -ENOMEM;
464 }
465
466 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
467 {
468 struct evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
469
470 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
471 if (IS_ERR(evsel))
472 evsel = perf_evsel__newtp("syscalls", direction);
473
474 if (IS_ERR(evsel))
475 return NULL;
476
477 if (perf_evsel__init_raw_syscall_tp(evsel, handler))
478 goto out_delete;
479
480 return evsel;
481
482 out_delete:
483 evsel__delete_priv(evsel);
484 return NULL;
485 }
486
487 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
488 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
489 fields->name.integer(&fields->name, sample); })
490
491 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
492 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
493 fields->name.pointer(&fields->name, sample); })
494
495 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
496 {
497 int idx = val - sa->offset;
498
499 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
500 size_t printed = scnprintf(bf, size, intfmt, val);
501 if (show_suffix)
502 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
503 return printed;
504 }
505
506 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
507 }
508
509 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
510 {
511 int idx = val - sa->offset;
512
513 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
514 size_t printed = scnprintf(bf, size, intfmt, val);
515 if (show_prefix)
516 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
517 return printed;
518 }
519
520 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
521 }
522
523 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
524 const char *intfmt,
525 struct syscall_arg *arg)
526 {
527 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
528 }
529
530 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
531 struct syscall_arg *arg)
532 {
533 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
534 }
535
536 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
537
538 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
539 {
540 return strarray__strtoul(arg->parm, bf, size, ret);
541 }
542
543 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
544 {
545 return strarray__strtoul_flags(arg->parm, bf, size, ret);
546 }
547
548 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
549 {
550 return strarrays__strtoul(arg->parm, bf, size, ret);
551 }
552
553 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
554 {
555 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
556 }
557
558 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
559 {
560 size_t printed;
561 int i;
562
563 for (i = 0; i < sas->nr_entries; ++i) {
564 struct strarray *sa = sas->entries[i];
565 int idx = val - sa->offset;
566
567 if (idx >= 0 && idx < sa->nr_entries) {
568 if (sa->entries[idx] == NULL)
569 break;
570 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
571 }
572 }
573
574 printed = scnprintf(bf, size, intfmt, val);
575 if (show_prefix)
576 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
577 return printed;
578 }
579
580 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
581 {
582 int i;
583
584 for (i = 0; i < sa->nr_entries; ++i) {
585 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
586 *ret = sa->offset + i;
587 return true;
588 }
589 }
590
591 return false;
592 }
593
594 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
595 {
596 u64 val = 0;
597 char *tok = bf, *sep, *end;
598
599 *ret = 0;
600
601 while (size != 0) {
602 int toklen = size;
603
604 sep = memchr(tok, '|', size);
605 if (sep != NULL) {
606 size -= sep - tok + 1;
607
608 end = sep - 1;
609 while (end > tok && isspace(*end))
610 --end;
611
612 toklen = end - tok + 1;
613 }
614
615 while (isspace(*tok))
616 ++tok;
617
618 if (isalpha(*tok) || *tok == '_') {
619 if (!strarray__strtoul(sa, tok, toklen, &val))
620 return false;
621 } else {
622 bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X');
623
624 val = strtoul(tok, NULL, is_hexa ? 16 : 0);
625 }
626
627 *ret |= (1 << (val - 1));
628
629 if (sep == NULL)
630 break;
631 tok = sep + 1;
632 }
633
634 return true;
635 }
636
637 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
638 {
639 int i;
640
641 for (i = 0; i < sas->nr_entries; ++i) {
642 struct strarray *sa = sas->entries[i];
643
644 if (strarray__strtoul(sa, bf, size, ret))
645 return true;
646 }
647
648 return false;
649 }
650
651 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
652 struct syscall_arg *arg)
653 {
654 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
655 }
656
657 #ifndef AT_FDCWD
658 #define AT_FDCWD -100
659 #endif
660
661 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
662 struct syscall_arg *arg)
663 {
664 int fd = arg->val;
665 const char *prefix = "AT_FD";
666
667 if (fd == AT_FDCWD)
668 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
669
670 return syscall_arg__scnprintf_fd(bf, size, arg);
671 }
672
673 #define SCA_FDAT syscall_arg__scnprintf_fd_at
674
675 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
676 struct syscall_arg *arg);
677
678 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
679
680 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
681 {
682 return scnprintf(bf, size, "%#lx", arg->val);
683 }
684
685 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
686 {
687 if (arg->val == 0)
688 return scnprintf(bf, size, "NULL");
689 return syscall_arg__scnprintf_hex(bf, size, arg);
690 }
691
692 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
693 {
694 return scnprintf(bf, size, "%d", arg->val);
695 }
696
697 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
698 {
699 return scnprintf(bf, size, "%ld", arg->val);
700 }
701
702 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
703 {
704 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
705 // fill missing comms using thread__set_comm()...
706 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
707 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
708 }
709
710 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
711
712 static const char *bpf_cmd[] = {
713 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
714 "MAP_GET_NEXT_KEY", "PROG_LOAD",
715 };
716 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
717
718 static const char *fsmount_flags[] = {
719 [1] = "CLOEXEC",
720 };
721 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
722
723 #include "trace/beauty/generated/fsconfig_arrays.c"
724
725 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
726
727 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
728 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
729
730 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
731 static DEFINE_STRARRAY(itimers, "ITIMER_");
732
733 static const char *keyctl_options[] = {
734 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
735 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
736 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
737 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
738 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
739 };
740 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
741
742 static const char *whences[] = { "SET", "CUR", "END",
743 #ifdef SEEK_DATA
744 "DATA",
745 #endif
746 #ifdef SEEK_HOLE
747 "HOLE",
748 #endif
749 };
750 static DEFINE_STRARRAY(whences, "SEEK_");
751
752 static const char *fcntl_cmds[] = {
753 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
754 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
755 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
756 "GETOWNER_UIDS",
757 };
758 static DEFINE_STRARRAY(fcntl_cmds, "F_");
759
760 static const char *fcntl_linux_specific_cmds[] = {
761 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
762 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
763 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
764 };
765
766 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
767
768 static struct strarray *fcntl_cmds_arrays[] = {
769 &strarray__fcntl_cmds,
770 &strarray__fcntl_linux_specific_cmds,
771 };
772
773 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
774
775 static const char *rlimit_resources[] = {
776 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
777 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
778 "RTTIME",
779 };
780 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
781
782 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
783 static DEFINE_STRARRAY(sighow, "SIG_");
784
785 static const char *clockid[] = {
786 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
787 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
788 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
789 };
790 static DEFINE_STRARRAY(clockid, "CLOCK_");
791
792 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
793 struct syscall_arg *arg)
794 {
795 bool show_prefix = arg->show_string_prefix;
796 const char *suffix = "_OK";
797 size_t printed = 0;
798 int mode = arg->val;
799
800 if (mode == F_OK) /* 0 */
801 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
802 #define P_MODE(n) \
803 if (mode & n##_OK) { \
804 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
805 mode &= ~n##_OK; \
806 }
807
808 P_MODE(R);
809 P_MODE(W);
810 P_MODE(X);
811 #undef P_MODE
812
813 if (mode)
814 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
815
816 return printed;
817 }
818
819 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
820
821 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
822 struct syscall_arg *arg);
823
824 #define SCA_FILENAME syscall_arg__scnprintf_filename
825
826 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
827 struct syscall_arg *arg)
828 {
829 bool show_prefix = arg->show_string_prefix;
830 const char *prefix = "O_";
831 int printed = 0, flags = arg->val;
832
833 #define P_FLAG(n) \
834 if (flags & O_##n) { \
835 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
836 flags &= ~O_##n; \
837 }
838
839 P_FLAG(CLOEXEC);
840 P_FLAG(NONBLOCK);
841 #undef P_FLAG
842
843 if (flags)
844 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
845
846 return printed;
847 }
848
849 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
850
851 #ifndef GRND_NONBLOCK
852 #define GRND_NONBLOCK 0x0001
853 #endif
854 #ifndef GRND_RANDOM
855 #define GRND_RANDOM 0x0002
856 #endif
857
858 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
859 struct syscall_arg *arg)
860 {
861 bool show_prefix = arg->show_string_prefix;
862 const char *prefix = "GRND_";
863 int printed = 0, flags = arg->val;
864
865 #define P_FLAG(n) \
866 if (flags & GRND_##n) { \
867 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
868 flags &= ~GRND_##n; \
869 }
870
871 P_FLAG(RANDOM);
872 P_FLAG(NONBLOCK);
873 #undef P_FLAG
874
875 if (flags)
876 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
877
878 return printed;
879 }
880
881 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
882
883 #define STRARRAY(name, array) \
884 { .scnprintf = SCA_STRARRAY, \
885 .strtoul = STUL_STRARRAY, \
886 .parm = &strarray__##array, }
887
888 #define STRARRAY_FLAGS(name, array) \
889 { .scnprintf = SCA_STRARRAY_FLAGS, \
890 .strtoul = STUL_STRARRAY_FLAGS, \
891 .parm = &strarray__##array, }
892
893 #include "trace/beauty/arch_errno_names.c"
894 #include "trace/beauty/eventfd.c"
895 #include "trace/beauty/futex_op.c"
896 #include "trace/beauty/futex_val3.c"
897 #include "trace/beauty/mmap.c"
898 #include "trace/beauty/mode_t.c"
899 #include "trace/beauty/msg_flags.c"
900 #include "trace/beauty/open_flags.c"
901 #include "trace/beauty/perf_event_open.c"
902 #include "trace/beauty/pid.c"
903 #include "trace/beauty/sched_policy.c"
904 #include "trace/beauty/seccomp.c"
905 #include "trace/beauty/signum.c"
906 #include "trace/beauty/socket_type.c"
907 #include "trace/beauty/waitid_options.c"
908
909 static struct syscall_fmt syscall_fmts[] = {
910 { .name = "access",
911 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
912 { .name = "arch_prctl",
913 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
914 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
915 { .name = "bind",
916 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
917 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
918 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
919 { .name = "bpf",
920 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
921 { .name = "brk", .hexret = true,
922 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
923 { .name = "clock_gettime",
924 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
925 { .name = "clone", .errpid = true, .nr_args = 5,
926 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
927 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
928 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
929 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
930 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
931 { .name = "close",
932 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
933 { .name = "connect",
934 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
935 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
936 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
937 { .name = "epoll_ctl",
938 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
939 { .name = "eventfd2",
940 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
941 { .name = "fchmodat",
942 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
943 { .name = "fchownat",
944 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
945 { .name = "fcntl",
946 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
947 .strtoul = STUL_STRARRAYS,
948 .parm = &strarrays__fcntl_cmds_arrays,
949 .show_zero = true, },
950 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
951 { .name = "flock",
952 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
953 { .name = "fsconfig",
954 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
955 { .name = "fsmount",
956 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
957 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
958 { .name = "fspick",
959 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
960 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
961 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
962 { .name = "fstat", .alias = "newfstat", },
963 { .name = "fstatat", .alias = "newfstatat", },
964 { .name = "futex",
965 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
966 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
967 { .name = "futimesat",
968 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
969 { .name = "getitimer",
970 .arg = { [0] = STRARRAY(which, itimers), }, },
971 { .name = "getpid", .errpid = true, },
972 { .name = "getpgid", .errpid = true, },
973 { .name = "getppid", .errpid = true, },
974 { .name = "getrandom",
975 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
976 { .name = "getrlimit",
977 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
978 { .name = "gettid", .errpid = true, },
979 { .name = "ioctl",
980 .arg = {
981 #if defined(__i386__) || defined(__x86_64__)
982 /*
983 * FIXME: Make this available to all arches.
984 */
985 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
986 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
987 #else
988 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
989 #endif
990 { .name = "kcmp", .nr_args = 5,
991 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
992 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
993 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
994 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
995 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
996 { .name = "keyctl",
997 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
998 { .name = "kill",
999 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1000 { .name = "linkat",
1001 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1002 { .name = "lseek",
1003 .arg = { [2] = STRARRAY(whence, whences), }, },
1004 { .name = "lstat", .alias = "newlstat", },
1005 { .name = "madvise",
1006 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1007 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1008 { .name = "mkdirat",
1009 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1010 { .name = "mknodat",
1011 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1012 { .name = "mmap", .hexret = true,
1013 /* The standard mmap maps to old_mmap on s390x */
1014 #if defined(__s390x__)
1015 .alias = "old_mmap",
1016 #endif
1017 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1018 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1019 .strtoul = STUL_STRARRAY_FLAGS,
1020 .parm = &strarray__mmap_flags, },
1021 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1022 { .name = "mount",
1023 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1024 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1025 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1026 { .name = "move_mount",
1027 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1028 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1029 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1030 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1031 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1032 { .name = "mprotect",
1033 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1034 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1035 { .name = "mq_unlink",
1036 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1037 { .name = "mremap", .hexret = true,
1038 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1039 { .name = "name_to_handle_at",
1040 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1041 { .name = "newfstatat",
1042 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1043 { .name = "open",
1044 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1045 { .name = "open_by_handle_at",
1046 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1047 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1048 { .name = "openat",
1049 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1050 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1051 { .name = "perf_event_open",
1052 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
1053 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1054 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1055 { .name = "pipe2",
1056 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1057 { .name = "pkey_alloc",
1058 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1059 { .name = "pkey_free",
1060 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1061 { .name = "pkey_mprotect",
1062 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1063 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1064 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1065 { .name = "poll", .timeout = true, },
1066 { .name = "ppoll", .timeout = true, },
1067 { .name = "prctl",
1068 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1069 .strtoul = STUL_STRARRAY,
1070 .parm = &strarray__prctl_options, },
1071 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1072 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1073 { .name = "pread", .alias = "pread64", },
1074 { .name = "preadv", .alias = "pread", },
1075 { .name = "prlimit64",
1076 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1077 { .name = "pwrite", .alias = "pwrite64", },
1078 { .name = "readlinkat",
1079 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1080 { .name = "recvfrom",
1081 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1082 { .name = "recvmmsg",
1083 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1084 { .name = "recvmsg",
1085 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1086 { .name = "renameat",
1087 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1088 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1089 { .name = "renameat2",
1090 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1091 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1092 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1093 { .name = "rt_sigaction",
1094 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1095 { .name = "rt_sigprocmask",
1096 .arg = { [0] = STRARRAY(how, sighow), }, },
1097 { .name = "rt_sigqueueinfo",
1098 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1099 { .name = "rt_tgsigqueueinfo",
1100 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1101 { .name = "sched_setscheduler",
1102 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1103 { .name = "seccomp",
1104 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1105 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1106 { .name = "select", .timeout = true, },
1107 { .name = "sendfile", .alias = "sendfile64", },
1108 { .name = "sendmmsg",
1109 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1110 { .name = "sendmsg",
1111 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1112 { .name = "sendto",
1113 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1114 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1115 { .name = "set_tid_address", .errpid = true, },
1116 { .name = "setitimer",
1117 .arg = { [0] = STRARRAY(which, itimers), }, },
1118 { .name = "setrlimit",
1119 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1120 { .name = "socket",
1121 .arg = { [0] = STRARRAY(family, socket_families),
1122 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1123 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1124 { .name = "socketpair",
1125 .arg = { [0] = STRARRAY(family, socket_families),
1126 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1127 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1128 { .name = "stat", .alias = "newstat", },
1129 { .name = "statx",
1130 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1131 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1132 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1133 { .name = "swapoff",
1134 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1135 { .name = "swapon",
1136 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1137 { .name = "symlinkat",
1138 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1139 { .name = "sync_file_range",
1140 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1141 { .name = "tgkill",
1142 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1143 { .name = "tkill",
1144 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1145 { .name = "umount2", .alias = "umount",
1146 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1147 { .name = "uname", .alias = "newuname", },
1148 { .name = "unlinkat",
1149 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1150 { .name = "utimensat",
1151 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1152 { .name = "wait4", .errpid = true,
1153 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1154 { .name = "waitid", .errpid = true,
1155 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1156 };
1157
1158 static int syscall_fmt__cmp(const void *name, const void *fmtp)
1159 {
1160 const struct syscall_fmt *fmt = fmtp;
1161 return strcmp(name, fmt->name);
1162 }
1163
1164 static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name)
1165 {
1166 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1167 }
1168
1169 static struct syscall_fmt *syscall_fmt__find(const char *name)
1170 {
1171 const int nmemb = ARRAY_SIZE(syscall_fmts);
1172 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1173 }
1174
1175 static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
1176 {
1177 int i;
1178
1179 for (i = 0; i < nmemb; ++i) {
1180 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1181 return &fmts[i];
1182 }
1183
1184 return NULL;
1185 }
1186
1187 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1188 {
1189 const int nmemb = ARRAY_SIZE(syscall_fmts);
1190 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1191 }
1192
1193 /*
1194 * is_exit: is this "exit" or "exit_group"?
1195 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1196 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1197 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1198 */
1199 struct syscall {
1200 struct tep_event *tp_format;
1201 int nr_args;
1202 int args_size;
1203 struct {
1204 struct bpf_program *sys_enter,
1205 *sys_exit;
1206 } bpf_prog;
1207 bool is_exit;
1208 bool is_open;
1209 bool nonexistent;
1210 struct tep_format_field *args;
1211 const char *name;
1212 struct syscall_fmt *fmt;
1213 struct syscall_arg_fmt *arg_fmt;
1214 };
1215
1216 /*
1217 * Must match what is in the BPF program:
1218 *
1219 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1220 */
1221 struct bpf_map_syscall_entry {
1222 bool enabled;
1223 u16 string_args_len[6];
1224 };
1225
1226 /*
1227 * We need to have this 'calculated' boolean because in some cases we really
1228 * don't know what is the duration of a syscall, for instance, when we start
1229 * a session and some threads are waiting for a syscall to finish, say 'poll',
1230 * in which case all we can do is to print "( ? ) for duration and for the
1231 * start timestamp.
1232 */
1233 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1234 {
1235 double duration = (double)t / NSEC_PER_MSEC;
1236 size_t printed = fprintf(fp, "(");
1237
1238 if (!calculated)
1239 printed += fprintf(fp, " ");
1240 else if (duration >= 1.0)
1241 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1242 else if (duration >= 0.01)
1243 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1244 else
1245 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1246 return printed + fprintf(fp, "): ");
1247 }
1248
1249 /**
1250 * filename.ptr: The filename char pointer that will be vfs_getname'd
1251 * filename.entry_str_pos: Where to insert the string translated from
1252 * filename.ptr by the vfs_getname tracepoint/kprobe.
1253 * ret_scnprintf: syscall args may set this to a different syscall return
1254 * formatter, for instance, fcntl may return fds, file flags, etc.
1255 */
1256 struct thread_trace {
1257 u64 entry_time;
1258 bool entry_pending;
1259 unsigned long nr_events;
1260 unsigned long pfmaj, pfmin;
1261 char *entry_str;
1262 double runtime_ms;
1263 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1264 struct {
1265 unsigned long ptr;
1266 short int entry_str_pos;
1267 bool pending_open;
1268 unsigned int namelen;
1269 char *name;
1270 } filename;
1271 struct {
1272 int max;
1273 struct file *table;
1274 } files;
1275
1276 struct intlist *syscall_stats;
1277 };
1278
1279 static struct thread_trace *thread_trace__new(void)
1280 {
1281 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1282
1283 if (ttrace) {
1284 ttrace->files.max = -1;
1285 ttrace->syscall_stats = intlist__new(NULL);
1286 }
1287
1288 return ttrace;
1289 }
1290
1291 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1292 {
1293 struct thread_trace *ttrace;
1294
1295 if (thread == NULL)
1296 goto fail;
1297
1298 if (thread__priv(thread) == NULL)
1299 thread__set_priv(thread, thread_trace__new());
1300
1301 if (thread__priv(thread) == NULL)
1302 goto fail;
1303
1304 ttrace = thread__priv(thread);
1305 ++ttrace->nr_events;
1306
1307 return ttrace;
1308 fail:
1309 color_fprintf(fp, PERF_COLOR_RED,
1310 "WARNING: not enough memory, dropping samples!\n");
1311 return NULL;
1312 }
1313
1314
1315 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1316 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1317 {
1318 struct thread_trace *ttrace = thread__priv(arg->thread);
1319
1320 ttrace->ret_scnprintf = ret_scnprintf;
1321 }
1322
1323 #define TRACE_PFMAJ (1 << 0)
1324 #define TRACE_PFMIN (1 << 1)
1325
1326 static const size_t trace__entry_str_size = 2048;
1327
1328 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1329 {
1330 if (fd < 0)
1331 return NULL;
1332
1333 if (fd > ttrace->files.max) {
1334 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1335
1336 if (nfiles == NULL)
1337 return NULL;
1338
1339 if (ttrace->files.max != -1) {
1340 memset(nfiles + ttrace->files.max + 1, 0,
1341 (fd - ttrace->files.max) * sizeof(struct file));
1342 } else {
1343 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1344 }
1345
1346 ttrace->files.table = nfiles;
1347 ttrace->files.max = fd;
1348 }
1349
1350 return ttrace->files.table + fd;
1351 }
1352
1353 struct file *thread__files_entry(struct thread *thread, int fd)
1354 {
1355 return thread_trace__files_entry(thread__priv(thread), fd);
1356 }
1357
1358 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1359 {
1360 struct thread_trace *ttrace = thread__priv(thread);
1361 struct file *file = thread_trace__files_entry(ttrace, fd);
1362
1363 if (file != NULL) {
1364 struct stat st;
1365 if (stat(pathname, &st) == 0)
1366 file->dev_maj = major(st.st_rdev);
1367 file->pathname = strdup(pathname);
1368 if (file->pathname)
1369 return 0;
1370 }
1371
1372 return -1;
1373 }
1374
1375 static int thread__read_fd_path(struct thread *thread, int fd)
1376 {
1377 char linkname[PATH_MAX], pathname[PATH_MAX];
1378 struct stat st;
1379 int ret;
1380
1381 if (thread->pid_ == thread->tid) {
1382 scnprintf(linkname, sizeof(linkname),
1383 "/proc/%d/fd/%d", thread->pid_, fd);
1384 } else {
1385 scnprintf(linkname, sizeof(linkname),
1386 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1387 }
1388
1389 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1390 return -1;
1391
1392 ret = readlink(linkname, pathname, sizeof(pathname));
1393
1394 if (ret < 0 || ret > st.st_size)
1395 return -1;
1396
1397 pathname[ret] = '\0';
1398 return trace__set_fd_pathname(thread, fd, pathname);
1399 }
1400
1401 static const char *thread__fd_path(struct thread *thread, int fd,
1402 struct trace *trace)
1403 {
1404 struct thread_trace *ttrace = thread__priv(thread);
1405
1406 if (ttrace == NULL || trace->fd_path_disabled)
1407 return NULL;
1408
1409 if (fd < 0)
1410 return NULL;
1411
1412 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1413 if (!trace->live)
1414 return NULL;
1415 ++trace->stats.proc_getname;
1416 if (thread__read_fd_path(thread, fd))
1417 return NULL;
1418 }
1419
1420 return ttrace->files.table[fd].pathname;
1421 }
1422
1423 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1424 {
1425 int fd = arg->val;
1426 size_t printed = scnprintf(bf, size, "%d", fd);
1427 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1428
1429 if (path)
1430 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1431
1432 return printed;
1433 }
1434
1435 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1436 {
1437 size_t printed = scnprintf(bf, size, "%d", fd);
1438 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1439
1440 if (thread) {
1441 const char *path = thread__fd_path(thread, fd, trace);
1442
1443 if (path)
1444 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1445
1446 thread__put(thread);
1447 }
1448
1449 return printed;
1450 }
1451
1452 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1453 struct syscall_arg *arg)
1454 {
1455 int fd = arg->val;
1456 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1457 struct thread_trace *ttrace = thread__priv(arg->thread);
1458
1459 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1460 zfree(&ttrace->files.table[fd].pathname);
1461
1462 return printed;
1463 }
1464
1465 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1466 unsigned long ptr)
1467 {
1468 struct thread_trace *ttrace = thread__priv(thread);
1469
1470 ttrace->filename.ptr = ptr;
1471 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1472 }
1473
1474 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1475 {
1476 struct augmented_arg *augmented_arg = arg->augmented.args;
1477 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1478 /*
1479 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1480 * we would have two strings, each prefixed by its size.
1481 */
1482 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1483
1484 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1485 arg->augmented.size -= consumed;
1486
1487 return printed;
1488 }
1489
1490 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1491 struct syscall_arg *arg)
1492 {
1493 unsigned long ptr = arg->val;
1494
1495 if (arg->augmented.args)
1496 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1497
1498 if (!arg->trace->vfs_getname)
1499 return scnprintf(bf, size, "%#x", ptr);
1500
1501 thread__set_filename_pos(arg->thread, bf, ptr);
1502 return 0;
1503 }
1504
1505 static bool trace__filter_duration(struct trace *trace, double t)
1506 {
1507 return t < (trace->duration_filter * NSEC_PER_MSEC);
1508 }
1509
1510 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1511 {
1512 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1513
1514 return fprintf(fp, "%10.3f ", ts);
1515 }
1516
1517 /*
1518 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1519 * using ttrace->entry_time for a thread that receives a sys_exit without
1520 * first having received a sys_enter ("poll" issued before tracing session
1521 * starts, lost sys_enter exit due to ring buffer overflow).
1522 */
1523 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1524 {
1525 if (tstamp > 0)
1526 return __trace__fprintf_tstamp(trace, tstamp, fp);
1527
1528 return fprintf(fp, " ? ");
1529 }
1530
1531 static bool done = false;
1532 static bool interrupted = false;
1533
1534 static void sig_handler(int sig)
1535 {
1536 done = true;
1537 interrupted = sig == SIGINT;
1538 }
1539
1540 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1541 {
1542 size_t printed = 0;
1543
1544 if (trace->multiple_threads) {
1545 if (trace->show_comm)
1546 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1547 printed += fprintf(fp, "%d ", thread->tid);
1548 }
1549
1550 return printed;
1551 }
1552
1553 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1554 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1555 {
1556 size_t printed = 0;
1557
1558 if (trace->show_tstamp)
1559 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1560 if (trace->show_duration)
1561 printed += fprintf_duration(duration, duration_calculated, fp);
1562 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1563 }
1564
1565 static int trace__process_event(struct trace *trace, struct machine *machine,
1566 union perf_event *event, struct perf_sample *sample)
1567 {
1568 int ret = 0;
1569
1570 switch (event->header.type) {
1571 case PERF_RECORD_LOST:
1572 color_fprintf(trace->output, PERF_COLOR_RED,
1573 "LOST %" PRIu64 " events!\n", event->lost.lost);
1574 ret = machine__process_lost_event(machine, event, sample);
1575 break;
1576 default:
1577 ret = machine__process_event(machine, event, sample);
1578 break;
1579 }
1580
1581 return ret;
1582 }
1583
1584 static int trace__tool_process(struct perf_tool *tool,
1585 union perf_event *event,
1586 struct perf_sample *sample,
1587 struct machine *machine)
1588 {
1589 struct trace *trace = container_of(tool, struct trace, tool);
1590 return trace__process_event(trace, machine, event, sample);
1591 }
1592
1593 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1594 {
1595 struct machine *machine = vmachine;
1596
1597 if (machine->kptr_restrict_warned)
1598 return NULL;
1599
1600 if (symbol_conf.kptr_restrict) {
1601 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1602 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1603 "Kernel samples will not be resolved.\n");
1604 machine->kptr_restrict_warned = true;
1605 return NULL;
1606 }
1607
1608 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1609 }
1610
1611 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1612 {
1613 int err = symbol__init(NULL);
1614
1615 if (err)
1616 return err;
1617
1618 trace->host = machine__new_host();
1619 if (trace->host == NULL)
1620 return -ENOMEM;
1621
1622 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1623 if (err < 0)
1624 goto out;
1625
1626 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1627 evlist->core.threads, trace__tool_process, false,
1628 1);
1629 out:
1630 if (err)
1631 symbol__exit();
1632
1633 return err;
1634 }
1635
1636 static void trace__symbols__exit(struct trace *trace)
1637 {
1638 machine__exit(trace->host);
1639 trace->host = NULL;
1640
1641 symbol__exit();
1642 }
1643
1644 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1645 {
1646 int idx;
1647
1648 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1649 nr_args = sc->fmt->nr_args;
1650
1651 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1652 if (sc->arg_fmt == NULL)
1653 return -1;
1654
1655 for (idx = 0; idx < nr_args; ++idx) {
1656 if (sc->fmt)
1657 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1658 }
1659
1660 sc->nr_args = nr_args;
1661 return 0;
1662 }
1663
1664 static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1665 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1666 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1667 };
1668
1669 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1670 {
1671 const struct syscall_arg_fmt *fmt = fmtp;
1672 return strcmp(name, fmt->name);
1673 }
1674
1675 static struct syscall_arg_fmt *
1676 __syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
1677 {
1678 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1679 }
1680
1681 static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1682 {
1683 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1684 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1685 }
1686
1687 static struct tep_format_field *
1688 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1689 {
1690 struct tep_format_field *last_field = NULL;
1691 int len;
1692
1693 for (; field; field = field->next, ++arg) {
1694 last_field = field;
1695
1696 if (arg->scnprintf)
1697 continue;
1698
1699 len = strlen(field->name);
1700
1701 if (strcmp(field->type, "const char *") == 0 &&
1702 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1703 strstr(field->name, "path") != NULL))
1704 arg->scnprintf = SCA_FILENAME;
1705 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1706 arg->scnprintf = SCA_PTR;
1707 else if (strcmp(field->type, "pid_t") == 0)
1708 arg->scnprintf = SCA_PID;
1709 else if (strcmp(field->type, "umode_t") == 0)
1710 arg->scnprintf = SCA_MODE_T;
1711 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1712 arg->scnprintf = SCA_CHAR_ARRAY;
1713 arg->nr_entries = field->arraylen;
1714 } else if ((strcmp(field->type, "int") == 0 ||
1715 strcmp(field->type, "unsigned int") == 0 ||
1716 strcmp(field->type, "long") == 0) &&
1717 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1718 /*
1719 * /sys/kernel/tracing/events/syscalls/sys_enter*
1720 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1721 * 65 int
1722 * 23 unsigned int
1723 * 7 unsigned long
1724 */
1725 arg->scnprintf = SCA_FD;
1726 } else {
1727 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
1728
1729 if (fmt) {
1730 arg->scnprintf = fmt->scnprintf;
1731 arg->strtoul = fmt->strtoul;
1732 }
1733 }
1734 }
1735
1736 return last_field;
1737 }
1738
1739 static int syscall__set_arg_fmts(struct syscall *sc)
1740 {
1741 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1742
1743 if (last_field)
1744 sc->args_size = last_field->offset + last_field->size;
1745
1746 return 0;
1747 }
1748
1749 static int trace__read_syscall_info(struct trace *trace, int id)
1750 {
1751 char tp_name[128];
1752 struct syscall *sc;
1753 const char *name = syscalltbl__name(trace->sctbl, id);
1754
1755 if (trace->syscalls.table == NULL) {
1756 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1757 if (trace->syscalls.table == NULL)
1758 return -ENOMEM;
1759 }
1760
1761 sc = trace->syscalls.table + id;
1762 if (sc->nonexistent)
1763 return 0;
1764
1765 if (name == NULL) {
1766 sc->nonexistent = true;
1767 return 0;
1768 }
1769
1770 sc->name = name;
1771 sc->fmt = syscall_fmt__find(sc->name);
1772
1773 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1774 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1775
1776 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1777 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1778 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1779 }
1780
1781 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1782 return -ENOMEM;
1783
1784 if (IS_ERR(sc->tp_format))
1785 return PTR_ERR(sc->tp_format);
1786
1787 sc->args = sc->tp_format->format.fields;
1788 /*
1789 * We need to check and discard the first variable '__syscall_nr'
1790 * or 'nr' that mean the syscall number. It is needless here.
1791 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1792 */
1793 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1794 sc->args = sc->args->next;
1795 --sc->nr_args;
1796 }
1797
1798 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1799 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1800
1801 return syscall__set_arg_fmts(sc);
1802 }
1803
1804 static int perf_evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1805 {
1806 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1807
1808 if (fmt != NULL) {
1809 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1810 return 0;
1811 }
1812
1813 return -ENOMEM;
1814 }
1815
1816 static int intcmp(const void *a, const void *b)
1817 {
1818 const int *one = a, *another = b;
1819
1820 return *one - *another;
1821 }
1822
1823 static int trace__validate_ev_qualifier(struct trace *trace)
1824 {
1825 int err = 0;
1826 bool printed_invalid_prefix = false;
1827 struct str_node *pos;
1828 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1829
1830 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1831 sizeof(trace->ev_qualifier_ids.entries[0]));
1832
1833 if (trace->ev_qualifier_ids.entries == NULL) {
1834 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1835 trace->output);
1836 err = -EINVAL;
1837 goto out;
1838 }
1839
1840 strlist__for_each_entry(pos, trace->ev_qualifier) {
1841 const char *sc = pos->s;
1842 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1843
1844 if (id < 0) {
1845 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1846 if (id >= 0)
1847 goto matches;
1848
1849 if (!printed_invalid_prefix) {
1850 pr_debug("Skipping unknown syscalls: ");
1851 printed_invalid_prefix = true;
1852 } else {
1853 pr_debug(", ");
1854 }
1855
1856 pr_debug("%s", sc);
1857 continue;
1858 }
1859 matches:
1860 trace->ev_qualifier_ids.entries[nr_used++] = id;
1861 if (match_next == -1)
1862 continue;
1863
1864 while (1) {
1865 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1866 if (id < 0)
1867 break;
1868 if (nr_allocated == nr_used) {
1869 void *entries;
1870
1871 nr_allocated += 8;
1872 entries = realloc(trace->ev_qualifier_ids.entries,
1873 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1874 if (entries == NULL) {
1875 err = -ENOMEM;
1876 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1877 goto out_free;
1878 }
1879 trace->ev_qualifier_ids.entries = entries;
1880 }
1881 trace->ev_qualifier_ids.entries[nr_used++] = id;
1882 }
1883 }
1884
1885 trace->ev_qualifier_ids.nr = nr_used;
1886 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1887 out:
1888 if (printed_invalid_prefix)
1889 pr_debug("\n");
1890 return err;
1891 out_free:
1892 zfree(&trace->ev_qualifier_ids.entries);
1893 trace->ev_qualifier_ids.nr = 0;
1894 goto out;
1895 }
1896
1897 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1898 {
1899 bool in_ev_qualifier;
1900
1901 if (trace->ev_qualifier_ids.nr == 0)
1902 return true;
1903
1904 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1905 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1906
1907 if (in_ev_qualifier)
1908 return !trace->not_ev_qualifier;
1909
1910 return trace->not_ev_qualifier;
1911 }
1912
1913 /*
1914 * args is to be interpreted as a series of longs but we need to handle
1915 * 8-byte unaligned accesses. args points to raw_data within the event
1916 * and raw_data is guaranteed to be 8-byte unaligned because it is
1917 * preceded by raw_size which is a u32. So we need to copy args to a temp
1918 * variable to read it. Most notably this avoids extended load instructions
1919 * on unaligned addresses
1920 */
1921 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1922 {
1923 unsigned long val;
1924 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1925
1926 memcpy(&val, p, sizeof(val));
1927 return val;
1928 }
1929
1930 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1931 struct syscall_arg *arg)
1932 {
1933 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1934 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1935
1936 return scnprintf(bf, size, "arg%d: ", arg->idx);
1937 }
1938
1939 /*
1940 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1941 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1942 * in tools/perf/trace/beauty/mount_flags.c
1943 */
1944 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1945 {
1946 if (fmt && fmt->mask_val)
1947 return fmt->mask_val(arg, val);
1948
1949 return val;
1950 }
1951
1952 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1953 struct syscall_arg *arg, unsigned long val)
1954 {
1955 if (fmt && fmt->scnprintf) {
1956 arg->val = val;
1957 if (fmt->parm)
1958 arg->parm = fmt->parm;
1959 return fmt->scnprintf(bf, size, arg);
1960 }
1961 return scnprintf(bf, size, "%ld", val);
1962 }
1963
1964 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1965 unsigned char *args, void *augmented_args, int augmented_args_size,
1966 struct trace *trace, struct thread *thread)
1967 {
1968 size_t printed = 0;
1969 unsigned long val;
1970 u8 bit = 1;
1971 struct syscall_arg arg = {
1972 .args = args,
1973 .augmented = {
1974 .size = augmented_args_size,
1975 .args = augmented_args,
1976 },
1977 .idx = 0,
1978 .mask = 0,
1979 .trace = trace,
1980 .thread = thread,
1981 .show_string_prefix = trace->show_string_prefix,
1982 };
1983 struct thread_trace *ttrace = thread__priv(thread);
1984
1985 /*
1986 * Things like fcntl will set this in its 'cmd' formatter to pick the
1987 * right formatter for the return value (an fd? file flags?), which is
1988 * not needed for syscalls that always return a given type, say an fd.
1989 */
1990 ttrace->ret_scnprintf = NULL;
1991
1992 if (sc->args != NULL) {
1993 struct tep_format_field *field;
1994
1995 for (field = sc->args; field;
1996 field = field->next, ++arg.idx, bit <<= 1) {
1997 if (arg.mask & bit)
1998 continue;
1999
2000 arg.fmt = &sc->arg_fmt[arg.idx];
2001 val = syscall_arg__val(&arg, arg.idx);
2002 /*
2003 * Some syscall args need some mask, most don't and
2004 * return val untouched.
2005 */
2006 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2007
2008 /*
2009 * Suppress this argument if its value is zero and
2010 * and we don't have a string associated in an
2011 * strarray for it.
2012 */
2013 if (val == 0 &&
2014 !trace->show_zeros &&
2015 !(sc->arg_fmt &&
2016 (sc->arg_fmt[arg.idx].show_zero ||
2017 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2018 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2019 sc->arg_fmt[arg.idx].parm))
2020 continue;
2021
2022 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2023
2024 if (trace->show_arg_names)
2025 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2026
2027 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2028 bf + printed, size - printed, &arg, val);
2029 }
2030 } else if (IS_ERR(sc->tp_format)) {
2031 /*
2032 * If we managed to read the tracepoint /format file, then we
2033 * may end up not having any args, like with gettid(), so only
2034 * print the raw args when we didn't manage to read it.
2035 */
2036 while (arg.idx < sc->nr_args) {
2037 if (arg.mask & bit)
2038 goto next_arg;
2039 val = syscall_arg__val(&arg, arg.idx);
2040 if (printed)
2041 printed += scnprintf(bf + printed, size - printed, ", ");
2042 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2043 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2044 next_arg:
2045 ++arg.idx;
2046 bit <<= 1;
2047 }
2048 }
2049
2050 return printed;
2051 }
2052
2053 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2054 union perf_event *event,
2055 struct perf_sample *sample);
2056
2057 static struct syscall *trace__syscall_info(struct trace *trace,
2058 struct evsel *evsel, int id)
2059 {
2060 int err = 0;
2061
2062 if (id < 0) {
2063
2064 /*
2065 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2066 * before that, leaving at a higher verbosity level till that is
2067 * explained. Reproduced with plain ftrace with:
2068 *
2069 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2070 * grep "NR -1 " /t/trace_pipe
2071 *
2072 * After generating some load on the machine.
2073 */
2074 if (verbose > 1) {
2075 static u64 n;
2076 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2077 id, perf_evsel__name(evsel), ++n);
2078 }
2079 return NULL;
2080 }
2081
2082 err = -EINVAL;
2083
2084 if (id > trace->sctbl->syscalls.max_id)
2085 goto out_cant_read;
2086
2087 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2088 (err = trace__read_syscall_info(trace, id)) != 0)
2089 goto out_cant_read;
2090
2091 if (trace->syscalls.table[id].name == NULL) {
2092 if (trace->syscalls.table[id].nonexistent)
2093 return NULL;
2094 goto out_cant_read;
2095 }
2096
2097 return &trace->syscalls.table[id];
2098
2099 out_cant_read:
2100 if (verbose > 0) {
2101 char sbuf[STRERR_BUFSIZE];
2102 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2103 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2104 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2105 fputs(" information\n", trace->output);
2106 }
2107 return NULL;
2108 }
2109
2110 struct syscall_stats {
2111 struct stats stats;
2112 u64 nr_failures;
2113 int max_errno;
2114 u32 *errnos;
2115 };
2116
2117 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2118 int id, struct perf_sample *sample, long err, bool errno_summary)
2119 {
2120 struct int_node *inode;
2121 struct syscall_stats *stats;
2122 u64 duration = 0;
2123
2124 inode = intlist__findnew(ttrace->syscall_stats, id);
2125 if (inode == NULL)
2126 return;
2127
2128 stats = inode->priv;
2129 if (stats == NULL) {
2130 stats = malloc(sizeof(*stats));
2131 if (stats == NULL)
2132 return;
2133
2134 stats->nr_failures = 0;
2135 stats->max_errno = 0;
2136 stats->errnos = NULL;
2137 init_stats(&stats->stats);
2138 inode->priv = stats;
2139 }
2140
2141 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2142 duration = sample->time - ttrace->entry_time;
2143
2144 update_stats(&stats->stats, duration);
2145
2146 if (err < 0) {
2147 ++stats->nr_failures;
2148
2149 if (!errno_summary)
2150 return;
2151
2152 err = -err;
2153 if (err > stats->max_errno) {
2154 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2155
2156 if (new_errnos) {
2157 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2158 } else {
2159 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2160 thread__comm_str(thread), thread->pid_, thread->tid);
2161 return;
2162 }
2163
2164 stats->errnos = new_errnos;
2165 stats->max_errno = err;
2166 }
2167
2168 ++stats->errnos[err - 1];
2169 }
2170 }
2171
2172 static int trace__printf_interrupted_entry(struct trace *trace)
2173 {
2174 struct thread_trace *ttrace;
2175 size_t printed;
2176 int len;
2177
2178 if (trace->failure_only || trace->current == NULL)
2179 return 0;
2180
2181 ttrace = thread__priv(trace->current);
2182
2183 if (!ttrace->entry_pending)
2184 return 0;
2185
2186 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2187 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2188
2189 if (len < trace->args_alignment - 4)
2190 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2191
2192 printed += fprintf(trace->output, " ...\n");
2193
2194 ttrace->entry_pending = false;
2195 ++trace->nr_events_printed;
2196
2197 return printed;
2198 }
2199
2200 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2201 struct perf_sample *sample, struct thread *thread)
2202 {
2203 int printed = 0;
2204
2205 if (trace->print_sample) {
2206 double ts = (double)sample->time / NSEC_PER_MSEC;
2207
2208 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2209 perf_evsel__name(evsel), ts,
2210 thread__comm_str(thread),
2211 sample->pid, sample->tid, sample->cpu);
2212 }
2213
2214 return printed;
2215 }
2216
2217 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2218 {
2219 void *augmented_args = NULL;
2220 /*
2221 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2222 * and there we get all 6 syscall args plus the tracepoint common fields
2223 * that gets calculated at the start and the syscall_nr (another long).
2224 * So we check if that is the case and if so don't look after the
2225 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2226 * which is fixed.
2227 *
2228 * We'll revisit this later to pass s->args_size to the BPF augmenter
2229 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2230 * copies only what we need for each syscall, like what happens when we
2231 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2232 * traffic to just what is needed for each syscall.
2233 */
2234 int args_size = raw_augmented_args_size ?: sc->args_size;
2235
2236 *augmented_args_size = sample->raw_size - args_size;
2237 if (*augmented_args_size > 0)
2238 augmented_args = sample->raw_data + args_size;
2239
2240 return augmented_args;
2241 }
2242
2243 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2244 union perf_event *event __maybe_unused,
2245 struct perf_sample *sample)
2246 {
2247 char *msg;
2248 void *args;
2249 int printed = 0;
2250 struct thread *thread;
2251 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2252 int augmented_args_size = 0;
2253 void *augmented_args = NULL;
2254 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2255 struct thread_trace *ttrace;
2256
2257 if (sc == NULL)
2258 return -1;
2259
2260 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2261 ttrace = thread__trace(thread, trace->output);
2262 if (ttrace == NULL)
2263 goto out_put;
2264
2265 trace__fprintf_sample(trace, evsel, sample, thread);
2266
2267 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2268
2269 if (ttrace->entry_str == NULL) {
2270 ttrace->entry_str = malloc(trace__entry_str_size);
2271 if (!ttrace->entry_str)
2272 goto out_put;
2273 }
2274
2275 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2276 trace__printf_interrupted_entry(trace);
2277 /*
2278 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2279 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2280 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2281 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2282 * so when handling, say the openat syscall, we end up getting 6 args for the
2283 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2284 * thinking that the extra 2 u64 args are the augmented filename, so just check
2285 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2286 */
2287 if (evsel != trace->syscalls.events.sys_enter)
2288 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2289 ttrace->entry_time = sample->time;
2290 msg = ttrace->entry_str;
2291 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2292
2293 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2294 args, augmented_args, augmented_args_size, trace, thread);
2295
2296 if (sc->is_exit) {
2297 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2298 int alignment = 0;
2299
2300 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2301 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2302 if (trace->args_alignment > printed)
2303 alignment = trace->args_alignment - printed;
2304 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2305 }
2306 } else {
2307 ttrace->entry_pending = true;
2308 /* See trace__vfs_getname & trace__sys_exit */
2309 ttrace->filename.pending_open = false;
2310 }
2311
2312 if (trace->current != thread) {
2313 thread__put(trace->current);
2314 trace->current = thread__get(thread);
2315 }
2316 err = 0;
2317 out_put:
2318 thread__put(thread);
2319 return err;
2320 }
2321
2322 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2323 struct perf_sample *sample)
2324 {
2325 struct thread_trace *ttrace;
2326 struct thread *thread;
2327 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2328 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2329 char msg[1024];
2330 void *args, *augmented_args = NULL;
2331 int augmented_args_size;
2332
2333 if (sc == NULL)
2334 return -1;
2335
2336 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2337 ttrace = thread__trace(thread, trace->output);
2338 /*
2339 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2340 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2341 */
2342 if (ttrace == NULL)
2343 goto out_put;
2344
2345 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2346 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2347 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2348 fprintf(trace->output, "%s", msg);
2349 err = 0;
2350 out_put:
2351 thread__put(thread);
2352 return err;
2353 }
2354
2355 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2356 struct perf_sample *sample,
2357 struct callchain_cursor *cursor)
2358 {
2359 struct addr_location al;
2360 int max_stack = evsel->core.attr.sample_max_stack ?
2361 evsel->core.attr.sample_max_stack :
2362 trace->max_stack;
2363 int err;
2364
2365 if (machine__resolve(trace->host, &al, sample) < 0)
2366 return -1;
2367
2368 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2369 addr_location__put(&al);
2370 return err;
2371 }
2372
2373 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2374 {
2375 /* TODO: user-configurable print_opts */
2376 const unsigned int print_opts = EVSEL__PRINT_SYM |
2377 EVSEL__PRINT_DSO |
2378 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2379
2380 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2381 }
2382
2383 static const char *errno_to_name(struct evsel *evsel, int err)
2384 {
2385 struct perf_env *env = perf_evsel__env(evsel);
2386 const char *arch_name = perf_env__arch(env);
2387
2388 return arch_syscalls__strerrno(arch_name, err);
2389 }
2390
2391 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2392 union perf_event *event __maybe_unused,
2393 struct perf_sample *sample)
2394 {
2395 long ret;
2396 u64 duration = 0;
2397 bool duration_calculated = false;
2398 struct thread *thread;
2399 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2400 int alignment = trace->args_alignment;
2401 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2402 struct thread_trace *ttrace;
2403
2404 if (sc == NULL)
2405 return -1;
2406
2407 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2408 ttrace = thread__trace(thread, trace->output);
2409 if (ttrace == NULL)
2410 goto out_put;
2411
2412 trace__fprintf_sample(trace, evsel, sample, thread);
2413
2414 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2415
2416 if (trace->summary)
2417 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2418
2419 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2420 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2421 ttrace->filename.pending_open = false;
2422 ++trace->stats.vfs_getname;
2423 }
2424
2425 if (ttrace->entry_time) {
2426 duration = sample->time - ttrace->entry_time;
2427 if (trace__filter_duration(trace, duration))
2428 goto out;
2429 duration_calculated = true;
2430 } else if (trace->duration_filter)
2431 goto out;
2432
2433 if (sample->callchain) {
2434 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2435 if (callchain_ret == 0) {
2436 if (callchain_cursor.nr < trace->min_stack)
2437 goto out;
2438 callchain_ret = 1;
2439 }
2440 }
2441
2442 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2443 goto out;
2444
2445 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2446
2447 if (ttrace->entry_pending) {
2448 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2449 } else {
2450 printed += fprintf(trace->output, " ... [");
2451 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2452 printed += 9;
2453 printed += fprintf(trace->output, "]: %s()", sc->name);
2454 }
2455
2456 printed++; /* the closing ')' */
2457
2458 if (alignment > printed)
2459 alignment -= printed;
2460 else
2461 alignment = 0;
2462
2463 fprintf(trace->output, ")%*s= ", alignment, " ");
2464
2465 if (sc->fmt == NULL) {
2466 if (ret < 0)
2467 goto errno_print;
2468 signed_print:
2469 fprintf(trace->output, "%ld", ret);
2470 } else if (ret < 0) {
2471 errno_print: {
2472 char bf[STRERR_BUFSIZE];
2473 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2474 *e = errno_to_name(evsel, -ret);
2475
2476 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2477 }
2478 } else if (ret == 0 && sc->fmt->timeout)
2479 fprintf(trace->output, "0 (Timeout)");
2480 else if (ttrace->ret_scnprintf) {
2481 char bf[1024];
2482 struct syscall_arg arg = {
2483 .val = ret,
2484 .thread = thread,
2485 .trace = trace,
2486 };
2487 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2488 ttrace->ret_scnprintf = NULL;
2489 fprintf(trace->output, "%s", bf);
2490 } else if (sc->fmt->hexret)
2491 fprintf(trace->output, "%#lx", ret);
2492 else if (sc->fmt->errpid) {
2493 struct thread *child = machine__find_thread(trace->host, ret, ret);
2494
2495 if (child != NULL) {
2496 fprintf(trace->output, "%ld", ret);
2497 if (child->comm_set)
2498 fprintf(trace->output, " (%s)", thread__comm_str(child));
2499 thread__put(child);
2500 }
2501 } else
2502 goto signed_print;
2503
2504 fputc('\n', trace->output);
2505
2506 /*
2507 * We only consider an 'event' for the sake of --max-events a non-filtered
2508 * sys_enter + sys_exit and other tracepoint events.
2509 */
2510 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2511 interrupted = true;
2512
2513 if (callchain_ret > 0)
2514 trace__fprintf_callchain(trace, sample);
2515 else if (callchain_ret < 0)
2516 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2517 out:
2518 ttrace->entry_pending = false;
2519 err = 0;
2520 out_put:
2521 thread__put(thread);
2522 return err;
2523 }
2524
2525 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2526 union perf_event *event __maybe_unused,
2527 struct perf_sample *sample)
2528 {
2529 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2530 struct thread_trace *ttrace;
2531 size_t filename_len, entry_str_len, to_move;
2532 ssize_t remaining_space;
2533 char *pos;
2534 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2535
2536 if (!thread)
2537 goto out;
2538
2539 ttrace = thread__priv(thread);
2540 if (!ttrace)
2541 goto out_put;
2542
2543 filename_len = strlen(filename);
2544 if (filename_len == 0)
2545 goto out_put;
2546
2547 if (ttrace->filename.namelen < filename_len) {
2548 char *f = realloc(ttrace->filename.name, filename_len + 1);
2549
2550 if (f == NULL)
2551 goto out_put;
2552
2553 ttrace->filename.namelen = filename_len;
2554 ttrace->filename.name = f;
2555 }
2556
2557 strcpy(ttrace->filename.name, filename);
2558 ttrace->filename.pending_open = true;
2559
2560 if (!ttrace->filename.ptr)
2561 goto out_put;
2562
2563 entry_str_len = strlen(ttrace->entry_str);
2564 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2565 if (remaining_space <= 0)
2566 goto out_put;
2567
2568 if (filename_len > (size_t)remaining_space) {
2569 filename += filename_len - remaining_space;
2570 filename_len = remaining_space;
2571 }
2572
2573 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2574 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2575 memmove(pos + filename_len, pos, to_move);
2576 memcpy(pos, filename, filename_len);
2577
2578 ttrace->filename.ptr = 0;
2579 ttrace->filename.entry_str_pos = 0;
2580 out_put:
2581 thread__put(thread);
2582 out:
2583 return 0;
2584 }
2585
2586 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2587 union perf_event *event __maybe_unused,
2588 struct perf_sample *sample)
2589 {
2590 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2591 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2592 struct thread *thread = machine__findnew_thread(trace->host,
2593 sample->pid,
2594 sample->tid);
2595 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2596
2597 if (ttrace == NULL)
2598 goto out_dump;
2599
2600 ttrace->runtime_ms += runtime_ms;
2601 trace->runtime_ms += runtime_ms;
2602 out_put:
2603 thread__put(thread);
2604 return 0;
2605
2606 out_dump:
2607 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2608 evsel->name,
2609 perf_evsel__strval(evsel, sample, "comm"),
2610 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2611 runtime,
2612 perf_evsel__intval(evsel, sample, "vruntime"));
2613 goto out_put;
2614 }
2615
2616 static int bpf_output__printer(enum binary_printer_ops op,
2617 unsigned int val, void *extra __maybe_unused, FILE *fp)
2618 {
2619 unsigned char ch = (unsigned char)val;
2620
2621 switch (op) {
2622 case BINARY_PRINT_CHAR_DATA:
2623 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2624 case BINARY_PRINT_DATA_BEGIN:
2625 case BINARY_PRINT_LINE_BEGIN:
2626 case BINARY_PRINT_ADDR:
2627 case BINARY_PRINT_NUM_DATA:
2628 case BINARY_PRINT_NUM_PAD:
2629 case BINARY_PRINT_SEP:
2630 case BINARY_PRINT_CHAR_PAD:
2631 case BINARY_PRINT_LINE_END:
2632 case BINARY_PRINT_DATA_END:
2633 default:
2634 break;
2635 }
2636
2637 return 0;
2638 }
2639
2640 static void bpf_output__fprintf(struct trace *trace,
2641 struct perf_sample *sample)
2642 {
2643 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2644 bpf_output__printer, NULL, trace->output);
2645 ++trace->nr_events_printed;
2646 }
2647
2648 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2649 struct thread *thread, void *augmented_args, int augmented_args_size)
2650 {
2651 char bf[2048];
2652 size_t size = sizeof(bf);
2653 struct tep_format_field *field = evsel->tp_format->format.fields;
2654 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2655 size_t printed = 0;
2656 unsigned long val;
2657 u8 bit = 1;
2658 struct syscall_arg syscall_arg = {
2659 .augmented = {
2660 .size = augmented_args_size,
2661 .args = augmented_args,
2662 },
2663 .idx = 0,
2664 .mask = 0,
2665 .trace = trace,
2666 .thread = thread,
2667 .show_string_prefix = trace->show_string_prefix,
2668 };
2669
2670 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2671 if (syscall_arg.mask & bit)
2672 continue;
2673
2674 syscall_arg.len = 0;
2675 syscall_arg.fmt = arg;
2676 if (field->flags & TEP_FIELD_IS_ARRAY) {
2677 int offset = field->offset;
2678
2679 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2680 offset = format_field__intval(field, sample, evsel->needs_swap);
2681 syscall_arg.len = offset >> 16;
2682 offset &= 0xffff;
2683 }
2684
2685 val = (uintptr_t)(sample->raw_data + offset);
2686 } else
2687 val = format_field__intval(field, sample, evsel->needs_swap);
2688 /*
2689 * Some syscall args need some mask, most don't and
2690 * return val untouched.
2691 */
2692 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2693
2694 /*
2695 * Suppress this argument if its value is zero and
2696 * and we don't have a string associated in an
2697 * strarray for it.
2698 */
2699 if (val == 0 &&
2700 !trace->show_zeros &&
2701 !((arg->show_zero ||
2702 arg->scnprintf == SCA_STRARRAY ||
2703 arg->scnprintf == SCA_STRARRAYS) &&
2704 arg->parm))
2705 continue;
2706
2707 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2708
2709 /*
2710 * XXX Perhaps we should have a show_tp_arg_names,
2711 * leaving show_arg_names just for syscalls?
2712 */
2713 if (1 || trace->show_arg_names)
2714 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2715
2716 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2717 }
2718
2719 return printed + fprintf(trace->output, "%s", bf);
2720 }
2721
2722 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2723 union perf_event *event __maybe_unused,
2724 struct perf_sample *sample)
2725 {
2726 struct thread *thread;
2727 int callchain_ret = 0;
2728 /*
2729 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2730 * this event's max_events having been hit and this is an entry coming
2731 * from the ring buffer that we should discard, since the max events
2732 * have already been considered/printed.
2733 */
2734 if (evsel->disabled)
2735 return 0;
2736
2737 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2738
2739 if (sample->callchain) {
2740 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2741 if (callchain_ret == 0) {
2742 if (callchain_cursor.nr < trace->min_stack)
2743 goto out;
2744 callchain_ret = 1;
2745 }
2746 }
2747
2748 trace__printf_interrupted_entry(trace);
2749 trace__fprintf_tstamp(trace, sample->time, trace->output);
2750
2751 if (trace->trace_syscalls && trace->show_duration)
2752 fprintf(trace->output, "( ): ");
2753
2754 if (thread)
2755 trace__fprintf_comm_tid(trace, thread, trace->output);
2756
2757 if (evsel == trace->syscalls.events.augmented) {
2758 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2759 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2760
2761 if (sc) {
2762 fprintf(trace->output, "%s(", sc->name);
2763 trace__fprintf_sys_enter(trace, evsel, sample);
2764 fputc(')', trace->output);
2765 goto newline;
2766 }
2767
2768 /*
2769 * XXX: Not having the associated syscall info or not finding/adding
2770 * the thread should never happen, but if it does...
2771 * fall thru and print it as a bpf_output event.
2772 */
2773 }
2774
2775 fprintf(trace->output, "%s(", evsel->name);
2776
2777 if (perf_evsel__is_bpf_output(evsel)) {
2778 bpf_output__fprintf(trace, sample);
2779 } else if (evsel->tp_format) {
2780 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2781 trace__fprintf_sys_enter(trace, evsel, sample)) {
2782 if (trace->libtraceevent_print) {
2783 event_format__fprintf(evsel->tp_format, sample->cpu,
2784 sample->raw_data, sample->raw_size,
2785 trace->output);
2786 } else {
2787 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2788 }
2789 }
2790 }
2791
2792 newline:
2793 fprintf(trace->output, ")\n");
2794
2795 if (callchain_ret > 0)
2796 trace__fprintf_callchain(trace, sample);
2797 else if (callchain_ret < 0)
2798 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2799
2800 ++trace->nr_events_printed;
2801
2802 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2803 evsel__disable(evsel);
2804 evsel__close(evsel);
2805 }
2806 out:
2807 thread__put(thread);
2808 return 0;
2809 }
2810
2811 static void print_location(FILE *f, struct perf_sample *sample,
2812 struct addr_location *al,
2813 bool print_dso, bool print_sym)
2814 {
2815
2816 if ((verbose > 0 || print_dso) && al->map)
2817 fprintf(f, "%s@", al->map->dso->long_name);
2818
2819 if ((verbose > 0 || print_sym) && al->sym)
2820 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2821 al->addr - al->sym->start);
2822 else if (al->map)
2823 fprintf(f, "0x%" PRIx64, al->addr);
2824 else
2825 fprintf(f, "0x%" PRIx64, sample->addr);
2826 }
2827
2828 static int trace__pgfault(struct trace *trace,
2829 struct evsel *evsel,
2830 union perf_event *event __maybe_unused,
2831 struct perf_sample *sample)
2832 {
2833 struct thread *thread;
2834 struct addr_location al;
2835 char map_type = 'd';
2836 struct thread_trace *ttrace;
2837 int err = -1;
2838 int callchain_ret = 0;
2839
2840 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2841
2842 if (sample->callchain) {
2843 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2844 if (callchain_ret == 0) {
2845 if (callchain_cursor.nr < trace->min_stack)
2846 goto out_put;
2847 callchain_ret = 1;
2848 }
2849 }
2850
2851 ttrace = thread__trace(thread, trace->output);
2852 if (ttrace == NULL)
2853 goto out_put;
2854
2855 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2856 ttrace->pfmaj++;
2857 else
2858 ttrace->pfmin++;
2859
2860 if (trace->summary_only)
2861 goto out;
2862
2863 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2864
2865 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2866
2867 fprintf(trace->output, "%sfault [",
2868 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2869 "maj" : "min");
2870
2871 print_location(trace->output, sample, &al, false, true);
2872
2873 fprintf(trace->output, "] => ");
2874
2875 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2876
2877 if (!al.map) {
2878 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2879
2880 if (al.map)
2881 map_type = 'x';
2882 else
2883 map_type = '?';
2884 }
2885
2886 print_location(trace->output, sample, &al, true, false);
2887
2888 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2889
2890 if (callchain_ret > 0)
2891 trace__fprintf_callchain(trace, sample);
2892 else if (callchain_ret < 0)
2893 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2894
2895 ++trace->nr_events_printed;
2896 out:
2897 err = 0;
2898 out_put:
2899 thread__put(thread);
2900 return err;
2901 }
2902
2903 static void trace__set_base_time(struct trace *trace,
2904 struct evsel *evsel,
2905 struct perf_sample *sample)
2906 {
2907 /*
2908 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2909 * and don't use sample->time unconditionally, we may end up having
2910 * some other event in the future without PERF_SAMPLE_TIME for good
2911 * reason, i.e. we may not be interested in its timestamps, just in
2912 * it taking place, picking some piece of information when it
2913 * appears in our event stream (vfs_getname comes to mind).
2914 */
2915 if (trace->base_time == 0 && !trace->full_time &&
2916 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2917 trace->base_time = sample->time;
2918 }
2919
2920 static int trace__process_sample(struct perf_tool *tool,
2921 union perf_event *event,
2922 struct perf_sample *sample,
2923 struct evsel *evsel,
2924 struct machine *machine __maybe_unused)
2925 {
2926 struct trace *trace = container_of(tool, struct trace, tool);
2927 struct thread *thread;
2928 int err = 0;
2929
2930 tracepoint_handler handler = evsel->handler;
2931
2932 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2933 if (thread && thread__is_filtered(thread))
2934 goto out;
2935
2936 trace__set_base_time(trace, evsel, sample);
2937
2938 if (handler) {
2939 ++trace->nr_events;
2940 handler(trace, evsel, event, sample);
2941 }
2942 out:
2943 thread__put(thread);
2944 return err;
2945 }
2946
2947 static int trace__record(struct trace *trace, int argc, const char **argv)
2948 {
2949 unsigned int rec_argc, i, j;
2950 const char **rec_argv;
2951 const char * const record_args[] = {
2952 "record",
2953 "-R",
2954 "-m", "1024",
2955 "-c", "1",
2956 };
2957 pid_t pid = getpid();
2958 char *filter = asprintf__tp_filter_pids(1, &pid);
2959 const char * const sc_args[] = { "-e", };
2960 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2961 const char * const majpf_args[] = { "-e", "major-faults" };
2962 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2963 const char * const minpf_args[] = { "-e", "minor-faults" };
2964 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2965 int err = -1;
2966
2967 /* +3 is for the event string below and the pid filter */
2968 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
2969 majpf_args_nr + minpf_args_nr + argc;
2970 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2971
2972 if (rec_argv == NULL || filter == NULL)
2973 goto out_free;
2974
2975 j = 0;
2976 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2977 rec_argv[j++] = record_args[i];
2978
2979 if (trace->trace_syscalls) {
2980 for (i = 0; i < sc_args_nr; i++)
2981 rec_argv[j++] = sc_args[i];
2982
2983 /* event string may be different for older kernels - e.g., RHEL6 */
2984 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2985 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2986 else if (is_valid_tracepoint("syscalls:sys_enter"))
2987 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2988 else {
2989 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2990 goto out_free;
2991 }
2992 }
2993
2994 rec_argv[j++] = "--filter";
2995 rec_argv[j++] = filter;
2996
2997 if (trace->trace_pgfaults & TRACE_PFMAJ)
2998 for (i = 0; i < majpf_args_nr; i++)
2999 rec_argv[j++] = majpf_args[i];
3000
3001 if (trace->trace_pgfaults & TRACE_PFMIN)
3002 for (i = 0; i < minpf_args_nr; i++)
3003 rec_argv[j++] = minpf_args[i];
3004
3005 for (i = 0; i < (unsigned int)argc; i++)
3006 rec_argv[j++] = argv[i];
3007
3008 err = cmd_record(j, rec_argv);
3009 out_free:
3010 free(filter);
3011 free(rec_argv);
3012 return err;
3013 }
3014
3015 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3016
3017 static bool evlist__add_vfs_getname(struct evlist *evlist)
3018 {
3019 bool found = false;
3020 struct evsel *evsel, *tmp;
3021 struct parse_events_error err;
3022 int ret;
3023
3024 bzero(&err, sizeof(err));
3025 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3026 if (ret) {
3027 free(err.str);
3028 free(err.help);
3029 free(err.first_str);
3030 free(err.first_help);
3031 return false;
3032 }
3033
3034 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3035 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
3036 continue;
3037
3038 if (perf_evsel__field(evsel, "pathname")) {
3039 evsel->handler = trace__vfs_getname;
3040 found = true;
3041 continue;
3042 }
3043
3044 list_del_init(&evsel->core.node);
3045 evsel->evlist = NULL;
3046 evsel__delete(evsel);
3047 }
3048
3049 return found;
3050 }
3051
3052 static struct evsel *perf_evsel__new_pgfault(u64 config)
3053 {
3054 struct evsel *evsel;
3055 struct perf_event_attr attr = {
3056 .type = PERF_TYPE_SOFTWARE,
3057 .mmap_data = 1,
3058 };
3059
3060 attr.config = config;
3061 attr.sample_period = 1;
3062
3063 event_attr_init(&attr);
3064
3065 evsel = evsel__new(&attr);
3066 if (evsel)
3067 evsel->handler = trace__pgfault;
3068
3069 return evsel;
3070 }
3071
3072 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3073 {
3074 const u32 type = event->header.type;
3075 struct evsel *evsel;
3076
3077 if (type != PERF_RECORD_SAMPLE) {
3078 trace__process_event(trace, trace->host, event, sample);
3079 return;
3080 }
3081
3082 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
3083 if (evsel == NULL) {
3084 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3085 return;
3086 }
3087
3088 if (evswitch__discard(&trace->evswitch, evsel))
3089 return;
3090
3091 trace__set_base_time(trace, evsel, sample);
3092
3093 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3094 sample->raw_data == NULL) {
3095 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3096 perf_evsel__name(evsel), sample->tid,
3097 sample->cpu, sample->raw_size);
3098 } else {
3099 tracepoint_handler handler = evsel->handler;
3100 handler(trace, evsel, event, sample);
3101 }
3102
3103 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3104 interrupted = true;
3105 }
3106
3107 static int trace__add_syscall_newtp(struct trace *trace)
3108 {
3109 int ret = -1;
3110 struct evlist *evlist = trace->evlist;
3111 struct evsel *sys_enter, *sys_exit;
3112
3113 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3114 if (sys_enter == NULL)
3115 goto out;
3116
3117 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3118 goto out_delete_sys_enter;
3119
3120 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3121 if (sys_exit == NULL)
3122 goto out_delete_sys_enter;
3123
3124 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3125 goto out_delete_sys_exit;
3126
3127 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3128 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3129
3130 evlist__add(evlist, sys_enter);
3131 evlist__add(evlist, sys_exit);
3132
3133 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3134 /*
3135 * We're interested only in the user space callchain
3136 * leading to the syscall, allow overriding that for
3137 * debugging reasons using --kernel_syscall_callchains
3138 */
3139 sys_exit->core.attr.exclude_callchain_kernel = 1;
3140 }
3141
3142 trace->syscalls.events.sys_enter = sys_enter;
3143 trace->syscalls.events.sys_exit = sys_exit;
3144
3145 ret = 0;
3146 out:
3147 return ret;
3148
3149 out_delete_sys_exit:
3150 evsel__delete_priv(sys_exit);
3151 out_delete_sys_enter:
3152 evsel__delete_priv(sys_enter);
3153 goto out;
3154 }
3155
3156 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3157 {
3158 int err = -1;
3159 struct evsel *sys_exit;
3160 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3161 trace->ev_qualifier_ids.nr,
3162 trace->ev_qualifier_ids.entries);
3163
3164 if (filter == NULL)
3165 goto out_enomem;
3166
3167 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
3168 filter)) {
3169 sys_exit = trace->syscalls.events.sys_exit;
3170 err = perf_evsel__append_tp_filter(sys_exit, filter);
3171 }
3172
3173 free(filter);
3174 out:
3175 return err;
3176 out_enomem:
3177 errno = ENOMEM;
3178 goto out;
3179 }
3180
3181 #ifdef HAVE_LIBBPF_SUPPORT
3182 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3183 {
3184 if (trace->bpf_obj == NULL)
3185 return NULL;
3186
3187 return bpf_object__find_program_by_title(trace->bpf_obj, name);
3188 }
3189
3190 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3191 const char *prog_name, const char *type)
3192 {
3193 struct bpf_program *prog;
3194
3195 if (prog_name == NULL) {
3196 char default_prog_name[256];
3197 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3198 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3199 if (prog != NULL)
3200 goto out_found;
3201 if (sc->fmt && sc->fmt->alias) {
3202 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3203 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3204 if (prog != NULL)
3205 goto out_found;
3206 }
3207 goto out_unaugmented;
3208 }
3209
3210 prog = trace__find_bpf_program_by_title(trace, prog_name);
3211
3212 if (prog != NULL) {
3213 out_found:
3214 return prog;
3215 }
3216
3217 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3218 prog_name, type, sc->name);
3219 out_unaugmented:
3220 return trace->syscalls.unaugmented_prog;
3221 }
3222
3223 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3224 {
3225 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3226
3227 if (sc == NULL)
3228 return;
3229
3230 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3231 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3232 }
3233
3234 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3235 {
3236 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3237 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3238 }
3239
3240 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3241 {
3242 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3243 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3244 }
3245
3246 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3247 {
3248 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3249 int arg = 0;
3250
3251 if (sc == NULL)
3252 goto out;
3253
3254 for (; arg < sc->nr_args; ++arg) {
3255 entry->string_args_len[arg] = 0;
3256 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3257 /* Should be set like strace -s strsize */
3258 entry->string_args_len[arg] = PATH_MAX;
3259 }
3260 }
3261 out:
3262 for (; arg < 6; ++arg)
3263 entry->string_args_len[arg] = 0;
3264 }
3265 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3266 {
3267 int fd = bpf_map__fd(trace->syscalls.map);
3268 struct bpf_map_syscall_entry value = {
3269 .enabled = !trace->not_ev_qualifier,
3270 };
3271 int err = 0;
3272 size_t i;
3273
3274 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3275 int key = trace->ev_qualifier_ids.entries[i];
3276
3277 if (value.enabled) {
3278 trace__init_bpf_map_syscall_args(trace, key, &value);
3279 trace__init_syscall_bpf_progs(trace, key);
3280 }
3281
3282 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3283 if (err)
3284 break;
3285 }
3286
3287 return err;
3288 }
3289
3290 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3291 {
3292 int fd = bpf_map__fd(trace->syscalls.map);
3293 struct bpf_map_syscall_entry value = {
3294 .enabled = enabled,
3295 };
3296 int err = 0, key;
3297
3298 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3299 if (enabled)
3300 trace__init_bpf_map_syscall_args(trace, key, &value);
3301
3302 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3303 if (err)
3304 break;
3305 }
3306
3307 return err;
3308 }
3309
3310 static int trace__init_syscalls_bpf_map(struct trace *trace)
3311 {
3312 bool enabled = true;
3313
3314 if (trace->ev_qualifier_ids.nr)
3315 enabled = trace->not_ev_qualifier;
3316
3317 return __trace__init_syscalls_bpf_map(trace, enabled);
3318 }
3319
3320 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3321 {
3322 struct tep_format_field *field, *candidate_field;
3323 int id;
3324
3325 /*
3326 * We're only interested in syscalls that have a pointer:
3327 */
3328 for (field = sc->args; field; field = field->next) {
3329 if (field->flags & TEP_FIELD_IS_POINTER)
3330 goto try_to_find_pair;
3331 }
3332
3333 return NULL;
3334
3335 try_to_find_pair:
3336 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3337 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3338 struct bpf_program *pair_prog;
3339 bool is_candidate = false;
3340
3341 if (pair == NULL || pair == sc ||
3342 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3343 continue;
3344
3345 for (field = sc->args, candidate_field = pair->args;
3346 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3347 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3348 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3349
3350 if (is_pointer) {
3351 if (!candidate_is_pointer) {
3352 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3353 continue;
3354 }
3355 } else {
3356 if (candidate_is_pointer) {
3357 // The candidate might copy a pointer we don't have, skip it.
3358 goto next_candidate;
3359 }
3360 continue;
3361 }
3362
3363 if (strcmp(field->type, candidate_field->type))
3364 goto next_candidate;
3365
3366 is_candidate = true;
3367 }
3368
3369 if (!is_candidate)
3370 goto next_candidate;
3371
3372 /*
3373 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3374 * then it may be collecting that and we then can't use it, as it would collect
3375 * more than what is common to the two syscalls.
3376 */
3377 if (candidate_field) {
3378 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3379 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3380 goto next_candidate;
3381 }
3382
3383 pair_prog = pair->bpf_prog.sys_enter;
3384 /*
3385 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3386 * have been searched for, so search it here and if it returns the
3387 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3388 * program for a filtered syscall on a non-filtered one.
3389 *
3390 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3391 * useful for "renameat2".
3392 */
3393 if (pair_prog == NULL) {
3394 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3395 if (pair_prog == trace->syscalls.unaugmented_prog)
3396 goto next_candidate;
3397 }
3398
3399 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3400 return pair_prog;
3401 next_candidate:
3402 continue;
3403 }
3404
3405 return NULL;
3406 }
3407
3408 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3409 {
3410 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3411 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3412 int err = 0, key;
3413
3414 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3415 int prog_fd;
3416
3417 if (!trace__syscall_enabled(trace, key))
3418 continue;
3419
3420 trace__init_syscall_bpf_progs(trace, key);
3421
3422 // It'll get at least the "!raw_syscalls:unaugmented"
3423 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3424 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3425 if (err)
3426 break;
3427 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3428 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3429 if (err)
3430 break;
3431 }
3432
3433 /*
3434 * Now lets do a second pass looking for enabled syscalls without
3435 * an augmenter that have a signature that is a superset of another
3436 * syscall with an augmenter so that we can auto-reuse it.
3437 *
3438 * I.e. if we have an augmenter for the "open" syscall that has
3439 * this signature:
3440 *
3441 * int open(const char *pathname, int flags, mode_t mode);
3442 *
3443 * I.e. that will collect just the first string argument, then we
3444 * can reuse it for the 'creat' syscall, that has this signature:
3445 *
3446 * int creat(const char *pathname, mode_t mode);
3447 *
3448 * and for:
3449 *
3450 * int stat(const char *pathname, struct stat *statbuf);
3451 * int lstat(const char *pathname, struct stat *statbuf);
3452 *
3453 * Because the 'open' augmenter will collect the first arg as a string,
3454 * and leave alone all the other args, which already helps with
3455 * beautifying 'stat' and 'lstat''s pathname arg.
3456 *
3457 * Then, in time, when 'stat' gets an augmenter that collects both
3458 * first and second arg (this one on the raw_syscalls:sys_exit prog
3459 * array tail call, then that one will be used.
3460 */
3461 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3462 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3463 struct bpf_program *pair_prog;
3464 int prog_fd;
3465
3466 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3467 continue;
3468
3469 /*
3470 * For now we're just reusing the sys_enter prog, and if it
3471 * already has an augmenter, we don't need to find one.
3472 */
3473 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3474 continue;
3475
3476 /*
3477 * Look at all the other syscalls for one that has a signature
3478 * that is close enough that we can share:
3479 */
3480 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3481 if (pair_prog == NULL)
3482 continue;
3483
3484 sc->bpf_prog.sys_enter = pair_prog;
3485
3486 /*
3487 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3488 * with the fd for the program we're reusing:
3489 */
3490 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3491 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3492 if (err)
3493 break;
3494 }
3495
3496
3497 return err;
3498 }
3499
3500 static void trace__delete_augmented_syscalls(struct trace *trace)
3501 {
3502 struct evsel *evsel, *tmp;
3503
3504 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3505 evsel__delete(trace->syscalls.events.augmented);
3506 trace->syscalls.events.augmented = NULL;
3507
3508 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3509 if (evsel->bpf_obj == trace->bpf_obj) {
3510 evlist__remove(trace->evlist, evsel);
3511 evsel__delete(evsel);
3512 }
3513
3514 }
3515
3516 bpf_object__close(trace->bpf_obj);
3517 trace->bpf_obj = NULL;
3518 }
3519 #else // HAVE_LIBBPF_SUPPORT
3520 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3521 {
3522 return 0;
3523 }
3524
3525 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3526 {
3527 return 0;
3528 }
3529
3530 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3531 const char *name __maybe_unused)
3532 {
3533 return NULL;
3534 }
3535
3536 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3537 {
3538 return 0;
3539 }
3540
3541 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3542 {
3543 }
3544 #endif // HAVE_LIBBPF_SUPPORT
3545
3546 static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3547 {
3548 struct evsel *evsel;
3549
3550 evlist__for_each_entry(trace->evlist, evsel) {
3551 if (evsel == trace->syscalls.events.augmented ||
3552 evsel->bpf_obj == trace->bpf_obj)
3553 continue;
3554
3555 return false;
3556 }
3557
3558 return true;
3559 }
3560
3561 static int trace__set_ev_qualifier_filter(struct trace *trace)
3562 {
3563 if (trace->syscalls.map)
3564 return trace__set_ev_qualifier_bpf_filter(trace);
3565 if (trace->syscalls.events.sys_enter)
3566 return trace__set_ev_qualifier_tp_filter(trace);
3567 return 0;
3568 }
3569
3570 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3571 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3572 {
3573 int err = 0;
3574 #ifdef HAVE_LIBBPF_SUPPORT
3575 bool value = true;
3576 int map_fd = bpf_map__fd(map);
3577 size_t i;
3578
3579 for (i = 0; i < npids; ++i) {
3580 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3581 if (err)
3582 break;
3583 }
3584 #endif
3585 return err;
3586 }
3587
3588 static int trace__set_filter_loop_pids(struct trace *trace)
3589 {
3590 unsigned int nr = 1, err;
3591 pid_t pids[32] = {
3592 getpid(),
3593 };
3594 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3595
3596 while (thread && nr < ARRAY_SIZE(pids)) {
3597 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3598
3599 if (parent == NULL)
3600 break;
3601
3602 if (!strcmp(thread__comm_str(parent), "sshd") ||
3603 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3604 pids[nr++] = parent->tid;
3605 break;
3606 }
3607 thread = parent;
3608 }
3609
3610 err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3611 if (!err && trace->filter_pids.map)
3612 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3613
3614 return err;
3615 }
3616
3617 static int trace__set_filter_pids(struct trace *trace)
3618 {
3619 int err = 0;
3620 /*
3621 * Better not use !target__has_task() here because we need to cover the
3622 * case where no threads were specified in the command line, but a
3623 * workload was, and in that case we will fill in the thread_map when
3624 * we fork the workload in perf_evlist__prepare_workload.
3625 */
3626 if (trace->filter_pids.nr > 0) {
3627 err = perf_evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3628 trace->filter_pids.entries);
3629 if (!err && trace->filter_pids.map) {
3630 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3631 trace->filter_pids.entries);
3632 }
3633 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3634 err = trace__set_filter_loop_pids(trace);
3635 }
3636
3637 return err;
3638 }
3639
3640 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3641 {
3642 struct evlist *evlist = trace->evlist;
3643 struct perf_sample sample;
3644 int err;
3645
3646 err = perf_evlist__parse_sample(evlist, event, &sample);
3647 if (err)
3648 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3649 else
3650 trace__handle_event(trace, event, &sample);
3651
3652 return 0;
3653 }
3654
3655 static int __trace__flush_events(struct trace *trace)
3656 {
3657 u64 first = ordered_events__first_time(&trace->oe.data);
3658 u64 flush = trace->oe.last - NSEC_PER_SEC;
3659
3660 /* Is there some thing to flush.. */
3661 if (first && first < flush)
3662 return ordered_events__flush_time(&trace->oe.data, flush);
3663
3664 return 0;
3665 }
3666
3667 static int trace__flush_events(struct trace *trace)
3668 {
3669 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3670 }
3671
3672 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3673 {
3674 int err;
3675
3676 if (!trace->sort_events)
3677 return __trace__deliver_event(trace, event);
3678
3679 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3680 if (err && err != -1)
3681 return err;
3682
3683 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3684 if (err)
3685 return err;
3686
3687 return trace__flush_events(trace);
3688 }
3689
3690 static int ordered_events__deliver_event(struct ordered_events *oe,
3691 struct ordered_event *event)
3692 {
3693 struct trace *trace = container_of(oe, struct trace, oe.data);
3694
3695 return __trace__deliver_event(trace, event->event);
3696 }
3697
3698 static struct syscall_arg_fmt *perf_evsel__syscall_arg_fmt(struct evsel *evsel, char *arg)
3699 {
3700 struct tep_format_field *field;
3701 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3702
3703 if (evsel->tp_format == NULL || fmt == NULL)
3704 return NULL;
3705
3706 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3707 if (strcmp(field->name, arg) == 0)
3708 return fmt;
3709
3710 return NULL;
3711 }
3712
3713 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3714 {
3715 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3716
3717 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3718 char *right = tok + 1, *right_end;
3719
3720 if (*right == '=')
3721 ++right;
3722
3723 while (isspace(*right))
3724 ++right;
3725
3726 if (*right == '\0')
3727 break;
3728
3729 while (!isalpha(*left))
3730 if (++left == tok) {
3731 /*
3732 * Bail out, can't find the name of the argument that is being
3733 * used in the filter, let it try to set this filter, will fail later.
3734 */
3735 return 0;
3736 }
3737
3738 right_end = right + 1;
3739 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3740 ++right_end;
3741
3742 if (isalpha(*right)) {
3743 struct syscall_arg_fmt *fmt;
3744 int left_size = tok - left,
3745 right_size = right_end - right;
3746 char arg[128];
3747
3748 while (isspace(left[left_size - 1]))
3749 --left_size;
3750
3751 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3752
3753 fmt = perf_evsel__syscall_arg_fmt(evsel, arg);
3754 if (fmt == NULL) {
3755 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3756 arg, evsel->name, evsel->filter);
3757 return -1;
3758 }
3759
3760 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3761 arg, (int)(right - tok), tok, right_size, right);
3762
3763 if (fmt->strtoul) {
3764 u64 val;
3765 struct syscall_arg syscall_arg = {
3766 .parm = fmt->parm,
3767 };
3768
3769 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3770 char *n, expansion[19];
3771 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3772 int expansion_offset = right - new_filter;
3773
3774 pr_debug("%s", expansion);
3775
3776 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3777 pr_debug(" out of memory!\n");
3778 free(new_filter);
3779 return -1;
3780 }
3781 if (new_filter != evsel->filter)
3782 free(new_filter);
3783 left = n + expansion_offset + expansion_lenght;
3784 new_filter = n;
3785 } else {
3786 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3787 right_size, right, arg, evsel->name, evsel->filter);
3788 return -1;
3789 }
3790 } else {
3791 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3792 arg, evsel->name, evsel->filter);
3793 return -1;
3794 }
3795
3796 pr_debug("\n");
3797 } else {
3798 left = right_end;
3799 }
3800 }
3801
3802 if (new_filter != evsel->filter) {
3803 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3804 perf_evsel__set_filter(evsel, new_filter);
3805 free(new_filter);
3806 }
3807
3808 return 0;
3809 }
3810
3811 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3812 {
3813 struct evlist *evlist = trace->evlist;
3814 struct evsel *evsel;
3815
3816 evlist__for_each_entry(evlist, evsel) {
3817 if (evsel->filter == NULL)
3818 continue;
3819
3820 if (trace__expand_filter(trace, evsel)) {
3821 *err_evsel = evsel;
3822 return -1;
3823 }
3824 }
3825
3826 return 0;
3827 }
3828
3829 static int trace__run(struct trace *trace, int argc, const char **argv)
3830 {
3831 struct evlist *evlist = trace->evlist;
3832 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3833 int err = -1, i;
3834 unsigned long before;
3835 const bool forks = argc > 0;
3836 bool draining = false;
3837
3838 trace->live = true;
3839
3840 if (!trace->raw_augmented_syscalls) {
3841 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3842 goto out_error_raw_syscalls;
3843
3844 if (trace->trace_syscalls)
3845 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3846 }
3847
3848 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3849 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3850 if (pgfault_maj == NULL)
3851 goto out_error_mem;
3852 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3853 evlist__add(evlist, pgfault_maj);
3854 }
3855
3856 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3857 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3858 if (pgfault_min == NULL)
3859 goto out_error_mem;
3860 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3861 evlist__add(evlist, pgfault_min);
3862 }
3863
3864 if (trace->sched &&
3865 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
3866 trace__sched_stat_runtime))
3867 goto out_error_sched_stat_runtime;
3868 /*
3869 * If a global cgroup was set, apply it to all the events without an
3870 * explicit cgroup. I.e.:
3871 *
3872 * trace -G A -e sched:*switch
3873 *
3874 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3875 * _and_ sched:sched_switch to the 'A' cgroup, while:
3876 *
3877 * trace -e sched:*switch -G A
3878 *
3879 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3880 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3881 * a cgroup (on the root cgroup, sys wide, etc).
3882 *
3883 * Multiple cgroups:
3884 *
3885 * trace -G A -e sched:*switch -G B
3886 *
3887 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3888 * to the 'B' cgroup.
3889 *
3890 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3891 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3892 */
3893 if (trace->cgroup)
3894 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3895
3896 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3897 if (err < 0) {
3898 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3899 goto out_delete_evlist;
3900 }
3901
3902 err = trace__symbols_init(trace, evlist);
3903 if (err < 0) {
3904 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3905 goto out_delete_evlist;
3906 }
3907
3908 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3909
3910 signal(SIGCHLD, sig_handler);
3911 signal(SIGINT, sig_handler);
3912
3913 if (forks) {
3914 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3915 argv, false, NULL);
3916 if (err < 0) {
3917 fprintf(trace->output, "Couldn't run the workload!\n");
3918 goto out_delete_evlist;
3919 }
3920 }
3921
3922 err = evlist__open(evlist);
3923 if (err < 0)
3924 goto out_error_open;
3925
3926 err = bpf__apply_obj_config();
3927 if (err) {
3928 char errbuf[BUFSIZ];
3929
3930 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3931 pr_err("ERROR: Apply config to BPF failed: %s\n",
3932 errbuf);
3933 goto out_error_open;
3934 }
3935
3936 err = trace__set_filter_pids(trace);
3937 if (err < 0)
3938 goto out_error_mem;
3939
3940 if (trace->syscalls.map)
3941 trace__init_syscalls_bpf_map(trace);
3942
3943 if (trace->syscalls.prog_array.sys_enter)
3944 trace__init_syscalls_bpf_prog_array_maps(trace);
3945
3946 if (trace->ev_qualifier_ids.nr > 0) {
3947 err = trace__set_ev_qualifier_filter(trace);
3948 if (err < 0)
3949 goto out_errno;
3950
3951 if (trace->syscalls.events.sys_exit) {
3952 pr_debug("event qualifier tracepoint filter: %s\n",
3953 trace->syscalls.events.sys_exit->filter);
3954 }
3955 }
3956
3957 /*
3958 * If the "close" syscall is not traced, then we will not have the
3959 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3960 * fd->pathname table and were ending up showing the last value set by
3961 * syscalls opening a pathname and associating it with a descriptor or
3962 * reading it from /proc/pid/fd/ in cases where that doesn't make
3963 * sense.
3964 *
3965 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3966 * not in use.
3967 */
3968 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3969
3970 err = trace__expand_filters(trace, &evsel);
3971 if (err)
3972 goto out_delete_evlist;
3973 err = perf_evlist__apply_filters(evlist, &evsel);
3974 if (err < 0)
3975 goto out_error_apply_filters;
3976
3977 if (trace->dump.map)
3978 bpf_map__fprintf(trace->dump.map, trace->output);
3979
3980 err = evlist__mmap(evlist, trace->opts.mmap_pages);
3981 if (err < 0)
3982 goto out_error_mmap;
3983
3984 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3985 evlist__enable(evlist);
3986
3987 if (forks)
3988 perf_evlist__start_workload(evlist);
3989
3990 if (trace->opts.initial_delay) {
3991 usleep(trace->opts.initial_delay * 1000);
3992 evlist__enable(evlist);
3993 }
3994
3995 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3996 evlist->core.threads->nr > 1 ||
3997 evlist__first(evlist)->core.attr.inherit;
3998
3999 /*
4000 * Now that we already used evsel->core.attr to ask the kernel to setup the
4001 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4002 * trace__resolve_callchain(), allowing per-event max-stack settings
4003 * to override an explicitly set --max-stack global setting.
4004 */
4005 evlist__for_each_entry(evlist, evsel) {
4006 if (evsel__has_callchain(evsel) &&
4007 evsel->core.attr.sample_max_stack == 0)
4008 evsel->core.attr.sample_max_stack = trace->max_stack;
4009 }
4010 again:
4011 before = trace->nr_events;
4012
4013 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4014 union perf_event *event;
4015 struct mmap *md;
4016
4017 md = &evlist->mmap[i];
4018 if (perf_mmap__read_init(&md->core) < 0)
4019 continue;
4020
4021 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4022 ++trace->nr_events;
4023
4024 err = trace__deliver_event(trace, event);
4025 if (err)
4026 goto out_disable;
4027
4028 perf_mmap__consume(&md->core);
4029
4030 if (interrupted)
4031 goto out_disable;
4032
4033 if (done && !draining) {
4034 evlist__disable(evlist);
4035 draining = true;
4036 }
4037 }
4038 perf_mmap__read_done(&md->core);
4039 }
4040
4041 if (trace->nr_events == before) {
4042 int timeout = done ? 100 : -1;
4043
4044 if (!draining && evlist__poll(evlist, timeout) > 0) {
4045 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4046 draining = true;
4047
4048 goto again;
4049 } else {
4050 if (trace__flush_events(trace))
4051 goto out_disable;
4052 }
4053 } else {
4054 goto again;
4055 }
4056
4057 out_disable:
4058 thread__zput(trace->current);
4059
4060 evlist__disable(evlist);
4061
4062 if (trace->sort_events)
4063 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4064
4065 if (!err) {
4066 if (trace->summary)
4067 trace__fprintf_thread_summary(trace, trace->output);
4068
4069 if (trace->show_tool_stats) {
4070 fprintf(trace->output, "Stats:\n "
4071 " vfs_getname : %" PRIu64 "\n"
4072 " proc_getname: %" PRIu64 "\n",
4073 trace->stats.vfs_getname,
4074 trace->stats.proc_getname);
4075 }
4076 }
4077
4078 out_delete_evlist:
4079 trace__symbols__exit(trace);
4080
4081 evlist__delete(evlist);
4082 cgroup__put(trace->cgroup);
4083 trace->evlist = NULL;
4084 trace->live = false;
4085 return err;
4086 {
4087 char errbuf[BUFSIZ];
4088
4089 out_error_sched_stat_runtime:
4090 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4091 goto out_error;
4092
4093 out_error_raw_syscalls:
4094 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4095 goto out_error;
4096
4097 out_error_mmap:
4098 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4099 goto out_error;
4100
4101 out_error_open:
4102 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4103
4104 out_error:
4105 fprintf(trace->output, "%s\n", errbuf);
4106 goto out_delete_evlist;
4107
4108 out_error_apply_filters:
4109 fprintf(trace->output,
4110 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4111 evsel->filter, perf_evsel__name(evsel), errno,
4112 str_error_r(errno, errbuf, sizeof(errbuf)));
4113 goto out_delete_evlist;
4114 }
4115 out_error_mem:
4116 fprintf(trace->output, "Not enough memory to run!\n");
4117 goto out_delete_evlist;
4118
4119 out_errno:
4120 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4121 goto out_delete_evlist;
4122 }
4123
4124 static int trace__replay(struct trace *trace)
4125 {
4126 const struct evsel_str_handler handlers[] = {
4127 { "probe:vfs_getname", trace__vfs_getname, },
4128 };
4129 struct perf_data data = {
4130 .path = input_name,
4131 .mode = PERF_DATA_MODE_READ,
4132 .force = trace->force,
4133 };
4134 struct perf_session *session;
4135 struct evsel *evsel;
4136 int err = -1;
4137
4138 trace->tool.sample = trace__process_sample;
4139 trace->tool.mmap = perf_event__process_mmap;
4140 trace->tool.mmap2 = perf_event__process_mmap2;
4141 trace->tool.comm = perf_event__process_comm;
4142 trace->tool.exit = perf_event__process_exit;
4143 trace->tool.fork = perf_event__process_fork;
4144 trace->tool.attr = perf_event__process_attr;
4145 trace->tool.tracing_data = perf_event__process_tracing_data;
4146 trace->tool.build_id = perf_event__process_build_id;
4147 trace->tool.namespaces = perf_event__process_namespaces;
4148
4149 trace->tool.ordered_events = true;
4150 trace->tool.ordering_requires_timestamps = true;
4151
4152 /* add tid to output */
4153 trace->multiple_threads = true;
4154
4155 session = perf_session__new(&data, false, &trace->tool);
4156 if (IS_ERR(session))
4157 return PTR_ERR(session);
4158
4159 if (trace->opts.target.pid)
4160 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4161
4162 if (trace->opts.target.tid)
4163 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4164
4165 if (symbol__init(&session->header.env) < 0)
4166 goto out;
4167
4168 trace->host = &session->machines.host;
4169
4170 err = perf_session__set_tracepoints_handlers(session, handlers);
4171 if (err)
4172 goto out;
4173
4174 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4175 "raw_syscalls:sys_enter");
4176 /* older kernels have syscalls tp versus raw_syscalls */
4177 if (evsel == NULL)
4178 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4179 "syscalls:sys_enter");
4180
4181 if (evsel &&
4182 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4183 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4184 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4185 goto out;
4186 }
4187
4188 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4189 "raw_syscalls:sys_exit");
4190 if (evsel == NULL)
4191 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4192 "syscalls:sys_exit");
4193 if (evsel &&
4194 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4195 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4196 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4197 goto out;
4198 }
4199
4200 evlist__for_each_entry(session->evlist, evsel) {
4201 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4202 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4203 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4204 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4205 evsel->handler = trace__pgfault;
4206 }
4207
4208 setup_pager();
4209
4210 err = perf_session__process_events(session);
4211 if (err)
4212 pr_err("Failed to process events, error %d", err);
4213
4214 else if (trace->summary)
4215 trace__fprintf_thread_summary(trace, trace->output);
4216
4217 out:
4218 perf_session__delete(session);
4219
4220 return err;
4221 }
4222
4223 static size_t trace__fprintf_threads_header(FILE *fp)
4224 {
4225 size_t printed;
4226
4227 printed = fprintf(fp, "\n Summary of events:\n\n");
4228
4229 return printed;
4230 }
4231
4232 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4233 struct syscall_stats *stats;
4234 double msecs;
4235 int syscall;
4236 )
4237 {
4238 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4239 struct syscall_stats *stats = source->priv;
4240
4241 entry->syscall = source->i;
4242 entry->stats = stats;
4243 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4244 }
4245
4246 static size_t thread__dump_stats(struct thread_trace *ttrace,
4247 struct trace *trace, FILE *fp)
4248 {
4249 size_t printed = 0;
4250 struct syscall *sc;
4251 struct rb_node *nd;
4252 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4253
4254 if (syscall_stats == NULL)
4255 return 0;
4256
4257 printed += fprintf(fp, "\n");
4258
4259 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4260 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4261 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4262
4263 resort_rb__for_each_entry(nd, syscall_stats) {
4264 struct syscall_stats *stats = syscall_stats_entry->stats;
4265 if (stats) {
4266 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4267 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4268 double avg = avg_stats(&stats->stats);
4269 double pct;
4270 u64 n = (u64)stats->stats.n;
4271
4272 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4273 avg /= NSEC_PER_MSEC;
4274
4275 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4276 printed += fprintf(fp, " %-15s", sc->name);
4277 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4278 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4279 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4280
4281 if (trace->errno_summary && stats->nr_failures) {
4282 const char *arch_name = perf_env__arch(trace->host->env);
4283 int e;
4284
4285 for (e = 0; e < stats->max_errno; ++e) {
4286 if (stats->errnos[e] != 0)
4287 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4288 }
4289 }
4290 }
4291 }
4292
4293 resort_rb__delete(syscall_stats);
4294 printed += fprintf(fp, "\n\n");
4295
4296 return printed;
4297 }
4298
4299 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4300 {
4301 size_t printed = 0;
4302 struct thread_trace *ttrace = thread__priv(thread);
4303 double ratio;
4304
4305 if (ttrace == NULL)
4306 return 0;
4307
4308 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4309
4310 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4311 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4312 printed += fprintf(fp, "%.1f%%", ratio);
4313 if (ttrace->pfmaj)
4314 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4315 if (ttrace->pfmin)
4316 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4317 if (trace->sched)
4318 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4319 else if (fputc('\n', fp) != EOF)
4320 ++printed;
4321
4322 printed += thread__dump_stats(ttrace, trace, fp);
4323
4324 return printed;
4325 }
4326
4327 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4328 {
4329 return ttrace ? ttrace->nr_events : 0;
4330 }
4331
4332 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4333 struct thread *thread;
4334 )
4335 {
4336 entry->thread = rb_entry(nd, struct thread, rb_node);
4337 }
4338
4339 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4340 {
4341 size_t printed = trace__fprintf_threads_header(fp);
4342 struct rb_node *nd;
4343 int i;
4344
4345 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4346 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4347
4348 if (threads == NULL) {
4349 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4350 return 0;
4351 }
4352
4353 resort_rb__for_each_entry(nd, threads)
4354 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4355
4356 resort_rb__delete(threads);
4357 }
4358 return printed;
4359 }
4360
4361 static int trace__set_duration(const struct option *opt, const char *str,
4362 int unset __maybe_unused)
4363 {
4364 struct trace *trace = opt->value;
4365
4366 trace->duration_filter = atof(str);
4367 return 0;
4368 }
4369
4370 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4371 int unset __maybe_unused)
4372 {
4373 int ret = -1;
4374 size_t i;
4375 struct trace *trace = opt->value;
4376 /*
4377 * FIXME: introduce a intarray class, plain parse csv and create a
4378 * { int nr, int entries[] } struct...
4379 */
4380 struct intlist *list = intlist__new(str);
4381
4382 if (list == NULL)
4383 return -1;
4384
4385 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4386 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4387
4388 if (trace->filter_pids.entries == NULL)
4389 goto out;
4390
4391 trace->filter_pids.entries[0] = getpid();
4392
4393 for (i = 1; i < trace->filter_pids.nr; ++i)
4394 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4395
4396 intlist__delete(list);
4397 ret = 0;
4398 out:
4399 return ret;
4400 }
4401
4402 static int trace__open_output(struct trace *trace, const char *filename)
4403 {
4404 struct stat st;
4405
4406 if (!stat(filename, &st) && st.st_size) {
4407 char oldname[PATH_MAX];
4408
4409 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4410 unlink(oldname);
4411 rename(filename, oldname);
4412 }
4413
4414 trace->output = fopen(filename, "w");
4415
4416 return trace->output == NULL ? -errno : 0;
4417 }
4418
4419 static int parse_pagefaults(const struct option *opt, const char *str,
4420 int unset __maybe_unused)
4421 {
4422 int *trace_pgfaults = opt->value;
4423
4424 if (strcmp(str, "all") == 0)
4425 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4426 else if (strcmp(str, "maj") == 0)
4427 *trace_pgfaults |= TRACE_PFMAJ;
4428 else if (strcmp(str, "min") == 0)
4429 *trace_pgfaults |= TRACE_PFMIN;
4430 else
4431 return -1;
4432
4433 return 0;
4434 }
4435
4436 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4437 {
4438 struct evsel *evsel;
4439
4440 evlist__for_each_entry(evlist, evsel) {
4441 if (evsel->handler == NULL)
4442 evsel->handler = handler;
4443 }
4444 }
4445
4446 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4447 {
4448 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4449
4450 if (fmt) {
4451 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4452
4453 if (scfmt) {
4454 int skip = 0;
4455
4456 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4457 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4458 ++skip;
4459
4460 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4461 }
4462 }
4463 }
4464
4465 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4466 {
4467 struct evsel *evsel;
4468
4469 evlist__for_each_entry(evlist, evsel) {
4470 if (evsel->priv || !evsel->tp_format)
4471 continue;
4472
4473 if (strcmp(evsel->tp_format->system, "syscalls")) {
4474 perf_evsel__init_tp_arg_scnprintf(evsel);
4475 continue;
4476 }
4477
4478 if (perf_evsel__init_syscall_tp(evsel))
4479 return -1;
4480
4481 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4482 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4483
4484 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4485 return -1;
4486
4487 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4488 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4489 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4490
4491 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4492 return -1;
4493
4494 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4495 }
4496 }
4497
4498 return 0;
4499 }
4500
4501 /*
4502 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4503 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4504 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4505 *
4506 * It'd be better to introduce a parse_options() variant that would return a
4507 * list with the terms it didn't match to an event...
4508 */
4509 static int trace__parse_events_option(const struct option *opt, const char *str,
4510 int unset __maybe_unused)
4511 {
4512 struct trace *trace = (struct trace *)opt->value;
4513 const char *s = str;
4514 char *sep = NULL, *lists[2] = { NULL, NULL, };
4515 int len = strlen(str) + 1, err = -1, list, idx;
4516 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4517 char group_name[PATH_MAX];
4518 struct syscall_fmt *fmt;
4519
4520 if (strace_groups_dir == NULL)
4521 return -1;
4522
4523 if (*s == '!') {
4524 ++s;
4525 trace->not_ev_qualifier = true;
4526 }
4527
4528 while (1) {
4529 if ((sep = strchr(s, ',')) != NULL)
4530 *sep = '\0';
4531
4532 list = 0;
4533 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4534 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4535 list = 1;
4536 goto do_concat;
4537 }
4538
4539 fmt = syscall_fmt__find_by_alias(s);
4540 if (fmt != NULL) {
4541 list = 1;
4542 s = fmt->name;
4543 } else {
4544 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4545 if (access(group_name, R_OK) == 0)
4546 list = 1;
4547 }
4548 do_concat:
4549 if (lists[list]) {
4550 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4551 } else {
4552 lists[list] = malloc(len);
4553 if (lists[list] == NULL)
4554 goto out;
4555 strcpy(lists[list], s);
4556 }
4557
4558 if (!sep)
4559 break;
4560
4561 *sep = ',';
4562 s = sep + 1;
4563 }
4564
4565 if (lists[1] != NULL) {
4566 struct strlist_config slist_config = {
4567 .dirname = strace_groups_dir,
4568 };
4569
4570 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4571 if (trace->ev_qualifier == NULL) {
4572 fputs("Not enough memory to parse event qualifier", trace->output);
4573 goto out;
4574 }
4575
4576 if (trace__validate_ev_qualifier(trace))
4577 goto out;
4578 trace->trace_syscalls = true;
4579 }
4580
4581 err = 0;
4582
4583 if (lists[0]) {
4584 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4585 "event selector. use 'perf list' to list available events",
4586 parse_events_option);
4587 err = parse_events_option(&o, lists[0], 0);
4588 }
4589 out:
4590 if (sep)
4591 *sep = ',';
4592
4593 return err;
4594 }
4595
4596 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4597 {
4598 struct trace *trace = opt->value;
4599
4600 if (!list_empty(&trace->evlist->core.entries))
4601 return parse_cgroups(opt, str, unset);
4602
4603 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4604
4605 return 0;
4606 }
4607
4608 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
4609 {
4610 if (trace->bpf_obj == NULL)
4611 return NULL;
4612
4613 return bpf_object__find_map_by_name(trace->bpf_obj, name);
4614 }
4615
4616 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
4617 {
4618 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
4619 }
4620
4621 static void trace__set_bpf_map_syscalls(struct trace *trace)
4622 {
4623 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
4624 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
4625 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
4626 }
4627
4628 static int trace__config(const char *var, const char *value, void *arg)
4629 {
4630 struct trace *trace = arg;
4631 int err = 0;
4632
4633 if (!strcmp(var, "trace.add_events")) {
4634 trace->perfconfig_events = strdup(value);
4635 if (trace->perfconfig_events == NULL) {
4636 pr_err("Not enough memory for %s\n", "trace.add_events");
4637 return -1;
4638 }
4639 } else if (!strcmp(var, "trace.show_timestamp")) {
4640 trace->show_tstamp = perf_config_bool(var, value);
4641 } else if (!strcmp(var, "trace.show_duration")) {
4642 trace->show_duration = perf_config_bool(var, value);
4643 } else if (!strcmp(var, "trace.show_arg_names")) {
4644 trace->show_arg_names = perf_config_bool(var, value);
4645 if (!trace->show_arg_names)
4646 trace->show_zeros = true;
4647 } else if (!strcmp(var, "trace.show_zeros")) {
4648 bool new_show_zeros = perf_config_bool(var, value);
4649 if (!trace->show_arg_names && !new_show_zeros) {
4650 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4651 goto out;
4652 }
4653 trace->show_zeros = new_show_zeros;
4654 } else if (!strcmp(var, "trace.show_prefix")) {
4655 trace->show_string_prefix = perf_config_bool(var, value);
4656 } else if (!strcmp(var, "trace.no_inherit")) {
4657 trace->opts.no_inherit = perf_config_bool(var, value);
4658 } else if (!strcmp(var, "trace.args_alignment")) {
4659 int args_alignment = 0;
4660 if (perf_config_int(&args_alignment, var, value) == 0)
4661 trace->args_alignment = args_alignment;
4662 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4663 if (strcasecmp(value, "libtraceevent") == 0)
4664 trace->libtraceevent_print = true;
4665 else if (strcasecmp(value, "libbeauty") == 0)
4666 trace->libtraceevent_print = false;
4667 }
4668 out:
4669 return err;
4670 }
4671
4672 int cmd_trace(int argc, const char **argv)
4673 {
4674 const char *trace_usage[] = {
4675 "perf trace [<options>] [<command>]",
4676 "perf trace [<options>] -- <command> [<options>]",
4677 "perf trace record [<options>] [<command>]",
4678 "perf trace record [<options>] -- <command> [<options>]",
4679 NULL
4680 };
4681 struct trace trace = {
4682 .opts = {
4683 .target = {
4684 .uid = UINT_MAX,
4685 .uses_mmap = true,
4686 },
4687 .user_freq = UINT_MAX,
4688 .user_interval = ULLONG_MAX,
4689 .no_buffering = true,
4690 .mmap_pages = UINT_MAX,
4691 },
4692 .output = stderr,
4693 .show_comm = true,
4694 .show_tstamp = true,
4695 .show_duration = true,
4696 .show_arg_names = true,
4697 .args_alignment = 70,
4698 .trace_syscalls = false,
4699 .kernel_syscallchains = false,
4700 .max_stack = UINT_MAX,
4701 .max_events = ULONG_MAX,
4702 };
4703 const char *map_dump_str = NULL;
4704 const char *output_name = NULL;
4705 const struct option trace_options[] = {
4706 OPT_CALLBACK('e', "event", &trace, "event",
4707 "event/syscall selector. use 'perf list' to list available events",
4708 trace__parse_events_option),
4709 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4710 "event filter", parse_filter),
4711 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4712 "show the thread COMM next to its id"),
4713 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4714 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4715 trace__parse_events_option),
4716 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4717 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4718 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4719 "trace events on existing process id"),
4720 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4721 "trace events on existing thread id"),
4722 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4723 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4724 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4725 "system-wide collection from all CPUs"),
4726 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4727 "list of cpus to monitor"),
4728 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4729 "child tasks do not inherit counters"),
4730 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4731 "number of mmap data pages",
4732 perf_evlist__parse_mmap_pages),
4733 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4734 "user to profile"),
4735 OPT_CALLBACK(0, "duration", &trace, "float",
4736 "show only events with duration > N.M ms",
4737 trace__set_duration),
4738 #ifdef HAVE_LIBBPF_SUPPORT
4739 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4740 #endif
4741 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4742 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4743 OPT_BOOLEAN('T', "time", &trace.full_time,
4744 "Show full timestamp, not time relative to first start"),
4745 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4746 "Show only syscalls that failed"),
4747 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4748 "Show only syscall summary with statistics"),
4749 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4750 "Show all syscalls and summary with statistics"),
4751 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4752 "Show errno stats per syscall, use with -s or -S"),
4753 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4754 "Trace pagefaults", parse_pagefaults, "maj"),
4755 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4756 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4757 OPT_CALLBACK(0, "call-graph", &trace.opts,
4758 "record_mode[,record_size]", record_callchain_help,
4759 &record_parse_callchain_opt),
4760 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4761 "Use libtraceevent to print the tracepoint arguments."),
4762 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4763 "Show the kernel callchains on the syscall exit path"),
4764 OPT_ULONG(0, "max-events", &trace.max_events,
4765 "Set the maximum number of events to print, exit after that is reached. "),
4766 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4767 "Set the minimum stack depth when parsing the callchain, "
4768 "anything below the specified depth will be ignored."),
4769 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4770 "Set the maximum stack depth when parsing the callchain, "
4771 "anything beyond the specified depth will be ignored. "
4772 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4773 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4774 "Sort batch of events before processing, use if getting out of order events"),
4775 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4776 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4777 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4778 "per thread proc mmap processing timeout in ms"),
4779 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4780 trace__parse_cgroups),
4781 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
4782 "ms to wait before starting measurement after program "
4783 "start"),
4784 OPTS_EVSWITCH(&trace.evswitch),
4785 OPT_END()
4786 };
4787 bool __maybe_unused max_stack_user_set = true;
4788 bool mmap_pages_user_set = true;
4789 struct evsel *evsel;
4790 const char * const trace_subcommands[] = { "record", NULL };
4791 int err = -1;
4792 char bf[BUFSIZ];
4793
4794 signal(SIGSEGV, sighandler_dump_stack);
4795 signal(SIGFPE, sighandler_dump_stack);
4796
4797 trace.evlist = evlist__new();
4798 trace.sctbl = syscalltbl__new();
4799
4800 if (trace.evlist == NULL || trace.sctbl == NULL) {
4801 pr_err("Not enough memory to run!\n");
4802 err = -ENOMEM;
4803 goto out;
4804 }
4805
4806 /*
4807 * Parsing .perfconfig may entail creating a BPF event, that may need
4808 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4809 * is too small. This affects just this process, not touching the
4810 * global setting. If it fails we'll get something in 'perf trace -v'
4811 * to help diagnose the problem.
4812 */
4813 rlimit__bump_memlock();
4814
4815 err = perf_config(trace__config, &trace);
4816 if (err)
4817 goto out;
4818
4819 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4820 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4821
4822 /*
4823 * Here we already passed thru trace__parse_events_option() and it has
4824 * already figured out if -e syscall_name, if not but if --event
4825 * foo:bar was used, the user is interested _just_ in those, say,
4826 * tracepoint events, not in the strace-like syscall-name-based mode.
4827 *
4828 * This is important because we need to check if strace-like mode is
4829 * needed to decided if we should filter out the eBPF
4830 * __augmented_syscalls__ code, if it is in the mix, say, via
4831 * .perfconfig trace.add_events, and filter those out.
4832 */
4833 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4834 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4835 trace.trace_syscalls = true;
4836 }
4837 /*
4838 * Now that we have --verbose figured out, lets see if we need to parse
4839 * events from .perfconfig, so that if those events fail parsing, say some
4840 * BPF program fails, then we'll be able to use --verbose to see what went
4841 * wrong in more detail.
4842 */
4843 if (trace.perfconfig_events != NULL) {
4844 struct parse_events_error parse_err;
4845
4846 bzero(&parse_err, sizeof(parse_err));
4847 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4848 if (err) {
4849 parse_events_print_error(&parse_err, trace.perfconfig_events);
4850 goto out;
4851 }
4852 }
4853
4854 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4855 usage_with_options_msg(trace_usage, trace_options,
4856 "cgroup monitoring only available in system-wide mode");
4857 }
4858
4859 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4860 if (IS_ERR(evsel)) {
4861 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4862 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4863 goto out;
4864 }
4865
4866 if (evsel) {
4867 trace.syscalls.events.augmented = evsel;
4868
4869 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4870 if (evsel == NULL) {
4871 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4872 goto out;
4873 }
4874
4875 if (evsel->bpf_obj == NULL) {
4876 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4877 goto out;
4878 }
4879
4880 trace.bpf_obj = evsel->bpf_obj;
4881
4882 /*
4883 * If we have _just_ the augmenter event but don't have a
4884 * explicit --syscalls, then assume we want all strace-like
4885 * syscalls:
4886 */
4887 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4888 trace.trace_syscalls = true;
4889 /*
4890 * So, if we have a syscall augmenter, but trace_syscalls, aka
4891 * strace-like syscall tracing is not set, then we need to trow
4892 * away the augmenter, i.e. all the events that were created
4893 * from that BPF object file.
4894 *
4895 * This is more to fix the current .perfconfig trace.add_events
4896 * style of setting up the strace-like eBPF based syscall point
4897 * payload augmenter.
4898 *
4899 * All this complexity will be avoided by adding an alternative
4900 * to trace.add_events in the form of
4901 * trace.bpf_augmented_syscalls, that will be only parsed if we
4902 * need it.
4903 *
4904 * .perfconfig trace.add_events is still useful if we want, for
4905 * instance, have msr_write.msr in some .perfconfig profile based
4906 * 'perf trace --config determinism.profile' mode, where for some
4907 * particular goal/workload type we want a set of events and
4908 * output mode (with timings, etc) instead of having to add
4909 * all via the command line.
4910 *
4911 * Also --config to specify an alternate .perfconfig file needs
4912 * to be implemented.
4913 */
4914 if (!trace.trace_syscalls) {
4915 trace__delete_augmented_syscalls(&trace);
4916 } else {
4917 trace__set_bpf_map_filtered_pids(&trace);
4918 trace__set_bpf_map_syscalls(&trace);
4919 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4920 }
4921 }
4922
4923 err = bpf__setup_stdout(trace.evlist);
4924 if (err) {
4925 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4926 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4927 goto out;
4928 }
4929
4930 err = -1;
4931
4932 if (map_dump_str) {
4933 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4934 if (trace.dump.map == NULL) {
4935 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4936 goto out;
4937 }
4938 }
4939
4940 if (trace.trace_pgfaults) {
4941 trace.opts.sample_address = true;
4942 trace.opts.sample_time = true;
4943 }
4944
4945 if (trace.opts.mmap_pages == UINT_MAX)
4946 mmap_pages_user_set = false;
4947
4948 if (trace.max_stack == UINT_MAX) {
4949 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4950 max_stack_user_set = false;
4951 }
4952
4953 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4954 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4955 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4956 }
4957 #endif
4958
4959 if (callchain_param.enabled) {
4960 if (!mmap_pages_user_set && geteuid() == 0)
4961 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4962
4963 symbol_conf.use_callchain = true;
4964 }
4965
4966 if (trace.evlist->core.nr_entries > 0) {
4967 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
4968 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4969 perror("failed to set syscalls:* tracepoint fields");
4970 goto out;
4971 }
4972 }
4973
4974 if (trace.sort_events) {
4975 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4976 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4977 }
4978
4979 /*
4980 * If we are augmenting syscalls, then combine what we put in the
4981 * __augmented_syscalls__ BPF map with what is in the
4982 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4983 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4984 *
4985 * We'll switch to look at two BPF maps, one for sys_enter and the
4986 * other for sys_exit when we start augmenting the sys_exit paths with
4987 * buffers that are being copied from kernel to userspace, think 'read'
4988 * syscall.
4989 */
4990 if (trace.syscalls.events.augmented) {
4991 evlist__for_each_entry(trace.evlist, evsel) {
4992 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4993
4994 if (raw_syscalls_sys_exit) {
4995 trace.raw_augmented_syscalls = true;
4996 goto init_augmented_syscall_tp;
4997 }
4998
4999 if (trace.syscalls.events.augmented->priv == NULL &&
5000 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
5001 struct evsel *augmented = trace.syscalls.events.augmented;
5002 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
5003 perf_evsel__init_augmented_syscall_tp_args(augmented))
5004 goto out;
5005 /*
5006 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5007 * Above we made sure we can get from the payload the tp fields
5008 * that we get from syscalls:sys_enter tracefs format file.
5009 */
5010 augmented->handler = trace__sys_enter;
5011 /*
5012 * Now we do the same for the *syscalls:sys_enter event so that
5013 * if we handle it directly, i.e. if the BPF prog returns 0 so
5014 * as not to filter it, then we'll handle it just like we would
5015 * for the BPF_OUTPUT one:
5016 */
5017 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) ||
5018 perf_evsel__init_augmented_syscall_tp_args(evsel))
5019 goto out;
5020 evsel->handler = trace__sys_enter;
5021 }
5022
5023 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
5024 struct syscall_tp *sc;
5025 init_augmented_syscall_tp:
5026 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
5027 goto out;
5028 sc = __evsel__syscall_tp(evsel);
5029 /*
5030 * For now with BPF raw_augmented we hook into
5031 * raw_syscalls:sys_enter and there we get all
5032 * 6 syscall args plus the tracepoint common
5033 * fields and the syscall_nr (another long).
5034 * So we check if that is the case and if so
5035 * don't look after the sc->args_size but
5036 * always after the full raw_syscalls:sys_enter
5037 * payload, which is fixed.
5038 *
5039 * We'll revisit this later to pass
5040 * s->args_size to the BPF augmenter (now
5041 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5042 * so that it copies only what we need for each
5043 * syscall, like what happens when we use
5044 * syscalls:sys_enter_NAME, so that we reduce
5045 * the kernel/userspace traffic to just what is
5046 * needed for each syscall.
5047 */
5048 if (trace.raw_augmented_syscalls)
5049 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5050 perf_evsel__init_augmented_syscall_tp_ret(evsel);
5051 evsel->handler = trace__sys_exit;
5052 }
5053 }
5054 }
5055
5056 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5057 return trace__record(&trace, argc-1, &argv[1]);
5058
5059 /* Using just --errno-summary will trigger --summary */
5060 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5061 trace.summary_only = true;
5062
5063 /* summary_only implies summary option, but don't overwrite summary if set */
5064 if (trace.summary_only)
5065 trace.summary = trace.summary_only;
5066
5067 if (output_name != NULL) {
5068 err = trace__open_output(&trace, output_name);
5069 if (err < 0) {
5070 perror("failed to create output file");
5071 goto out;
5072 }
5073 }
5074
5075 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5076 if (err)
5077 goto out_close;
5078
5079 err = target__validate(&trace.opts.target);
5080 if (err) {
5081 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5082 fprintf(trace.output, "%s", bf);
5083 goto out_close;
5084 }
5085
5086 err = target__parse_uid(&trace.opts.target);
5087 if (err) {
5088 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5089 fprintf(trace.output, "%s", bf);
5090 goto out_close;
5091 }
5092
5093 if (!argc && target__none(&trace.opts.target))
5094 trace.opts.target.system_wide = true;
5095
5096 if (input_name)
5097 err = trace__replay(&trace);
5098 else
5099 err = trace__run(&trace, argc, argv);
5100
5101 out_close:
5102 if (output_name != NULL)
5103 fclose(trace.output);
5104 out:
5105 zfree(&trace.perfconfig_events);
5106 return err;
5107 }
Linux with added FPC-III support