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Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / builtin-trace.c
blobbea461b6f937bfc1bc334dd48f688e454602f8d7
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 evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
370 {
371 struct tep_format_field *format_field = evsel__field(evsel, name);
372
373 if (format_field == NULL)
374 return -1;
375
376 return tp_field__init_uint(field, format_field, evsel->needs_swap);
377 }
378
379 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
380 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
381 evsel__init_tp_uint_field(evsel, &sc->name, #name); })
382
383 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
384 {
385 struct tep_format_field *format_field = evsel__field(evsel, name);
386
387 if (format_field == NULL)
388 return -1;
389
390 return tp_field__init_ptr(field, format_field);
391 }
392
393 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
394 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
395 evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
396
397 static void evsel__delete_priv(struct evsel *evsel)
398 {
399 zfree(&evsel->priv);
400 evsel__delete(evsel);
401 }
402
403 static int evsel__init_syscall_tp(struct evsel *evsel)
404 {
405 struct syscall_tp *sc = evsel__syscall_tp(evsel);
406
407 if (sc != NULL) {
408 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
409 evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
410 return -ENOENT;
411 return 0;
412 }
413
414 return -ENOMEM;
415 }
416
417 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
418 {
419 struct syscall_tp *sc = evsel__syscall_tp(evsel);
420
421 if (sc != NULL) {
422 struct tep_format_field *syscall_id = evsel__field(tp, "id");
423 if (syscall_id == NULL)
424 syscall_id = evsel__field(tp, "__syscall_nr");
425 if (syscall_id == NULL ||
426 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
427 return -EINVAL;
428
429 return 0;
430 }
431
432 return -ENOMEM;
433 }
434
435 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
436 {
437 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
438
439 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
440 }
441
442 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
443 {
444 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
445
446 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
447 }
448
449 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
450 {
451 if (evsel__syscall_tp(evsel) != NULL) {
452 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
453 return -ENOENT;
454
455 evsel->handler = handler;
456 return 0;
457 }
458
459 return -ENOMEM;
460 }
461
462 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
463 {
464 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
465
466 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
467 if (IS_ERR(evsel))
468 evsel = evsel__newtp("syscalls", direction);
469
470 if (IS_ERR(evsel))
471 return NULL;
472
473 if (evsel__init_raw_syscall_tp(evsel, handler))
474 goto out_delete;
475
476 return evsel;
477
478 out_delete:
479 evsel__delete_priv(evsel);
480 return NULL;
481 }
482
483 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
484 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
485 fields->name.integer(&fields->name, sample); })
486
487 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
488 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
489 fields->name.pointer(&fields->name, sample); })
490
491 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
492 {
493 int idx = val - sa->offset;
494
495 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
496 size_t printed = scnprintf(bf, size, intfmt, val);
497 if (show_suffix)
498 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
499 return printed;
500 }
501
502 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
503 }
504
505 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
506 {
507 int idx = val - sa->offset;
508
509 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
510 size_t printed = scnprintf(bf, size, intfmt, val);
511 if (show_prefix)
512 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
513 return printed;
514 }
515
516 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
517 }
518
519 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
520 const char *intfmt,
521 struct syscall_arg *arg)
522 {
523 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
524 }
525
526 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
527 struct syscall_arg *arg)
528 {
529 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
530 }
531
532 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
533
534 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
535 {
536 return strarray__strtoul(arg->parm, bf, size, ret);
537 }
538
539 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
540 {
541 return strarray__strtoul_flags(arg->parm, bf, size, ret);
542 }
543
544 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
545 {
546 return strarrays__strtoul(arg->parm, bf, size, ret);
547 }
548
549 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
550 {
551 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
552 }
553
554 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
555 {
556 size_t printed;
557 int i;
558
559 for (i = 0; i < sas->nr_entries; ++i) {
560 struct strarray *sa = sas->entries[i];
561 int idx = val - sa->offset;
562
563 if (idx >= 0 && idx < sa->nr_entries) {
564 if (sa->entries[idx] == NULL)
565 break;
566 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
567 }
568 }
569
570 printed = scnprintf(bf, size, intfmt, val);
571 if (show_prefix)
572 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
573 return printed;
574 }
575
576 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
577 {
578 int i;
579
580 for (i = 0; i < sa->nr_entries; ++i) {
581 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
582 *ret = sa->offset + i;
583 return true;
584 }
585 }
586
587 return false;
588 }
589
590 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
591 {
592 u64 val = 0;
593 char *tok = bf, *sep, *end;
594
595 *ret = 0;
596
597 while (size != 0) {
598 int toklen = size;
599
600 sep = memchr(tok, '|', size);
601 if (sep != NULL) {
602 size -= sep - tok + 1;
603
604 end = sep - 1;
605 while (end > tok && isspace(*end))
606 --end;
607
608 toklen = end - tok + 1;
609 }
610
611 while (isspace(*tok))
612 ++tok;
613
614 if (isalpha(*tok) || *tok == '_') {
615 if (!strarray__strtoul(sa, tok, toklen, &val))
616 return false;
617 } else {
618 bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X');
619
620 val = strtoul(tok, NULL, is_hexa ? 16 : 0);
621 }
622
623 *ret |= (1 << (val - 1));
624
625 if (sep == NULL)
626 break;
627 tok = sep + 1;
628 }
629
630 return true;
631 }
632
633 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
634 {
635 int i;
636
637 for (i = 0; i < sas->nr_entries; ++i) {
638 struct strarray *sa = sas->entries[i];
639
640 if (strarray__strtoul(sa, bf, size, ret))
641 return true;
642 }
643
644 return false;
645 }
646
647 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
648 struct syscall_arg *arg)
649 {
650 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
651 }
652
653 #ifndef AT_FDCWD
654 #define AT_FDCWD -100
655 #endif
656
657 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
658 struct syscall_arg *arg)
659 {
660 int fd = arg->val;
661 const char *prefix = "AT_FD";
662
663 if (fd == AT_FDCWD)
664 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
665
666 return syscall_arg__scnprintf_fd(bf, size, arg);
667 }
668
669 #define SCA_FDAT syscall_arg__scnprintf_fd_at
670
671 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
672 struct syscall_arg *arg);
673
674 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
675
676 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
677 {
678 return scnprintf(bf, size, "%#lx", arg->val);
679 }
680
681 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
682 {
683 if (arg->val == 0)
684 return scnprintf(bf, size, "NULL");
685 return syscall_arg__scnprintf_hex(bf, size, arg);
686 }
687
688 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
689 {
690 return scnprintf(bf, size, "%d", arg->val);
691 }
692
693 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
694 {
695 return scnprintf(bf, size, "%ld", arg->val);
696 }
697
698 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
699 {
700 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
701 // fill missing comms using thread__set_comm()...
702 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
703 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
704 }
705
706 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
707
708 static const char *bpf_cmd[] = {
709 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
710 "MAP_GET_NEXT_KEY", "PROG_LOAD",
711 };
712 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
713
714 static const char *fsmount_flags[] = {
715 [1] = "CLOEXEC",
716 };
717 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
718
719 #include "trace/beauty/generated/fsconfig_arrays.c"
720
721 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
722
723 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
724 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
725
726 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
727 static DEFINE_STRARRAY(itimers, "ITIMER_");
728
729 static const char *keyctl_options[] = {
730 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
731 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
732 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
733 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
734 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
735 };
736 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
737
738 static const char *whences[] = { "SET", "CUR", "END",
739 #ifdef SEEK_DATA
740 "DATA",
741 #endif
742 #ifdef SEEK_HOLE
743 "HOLE",
744 #endif
745 };
746 static DEFINE_STRARRAY(whences, "SEEK_");
747
748 static const char *fcntl_cmds[] = {
749 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
750 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
751 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
752 "GETOWNER_UIDS",
753 };
754 static DEFINE_STRARRAY(fcntl_cmds, "F_");
755
756 static const char *fcntl_linux_specific_cmds[] = {
757 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
758 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
759 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
760 };
761
762 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
763
764 static struct strarray *fcntl_cmds_arrays[] = {
765 &strarray__fcntl_cmds,
766 &strarray__fcntl_linux_specific_cmds,
767 };
768
769 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
770
771 static const char *rlimit_resources[] = {
772 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
773 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
774 "RTTIME",
775 };
776 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
777
778 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
779 static DEFINE_STRARRAY(sighow, "SIG_");
780
781 static const char *clockid[] = {
782 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
783 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
784 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
785 };
786 static DEFINE_STRARRAY(clockid, "CLOCK_");
787
788 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
789 struct syscall_arg *arg)
790 {
791 bool show_prefix = arg->show_string_prefix;
792 const char *suffix = "_OK";
793 size_t printed = 0;
794 int mode = arg->val;
795
796 if (mode == F_OK) /* 0 */
797 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
798 #define P_MODE(n) \
799 if (mode & n##_OK) { \
800 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
801 mode &= ~n##_OK; \
802 }
803
804 P_MODE(R);
805 P_MODE(W);
806 P_MODE(X);
807 #undef P_MODE
808
809 if (mode)
810 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
811
812 return printed;
813 }
814
815 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
816
817 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
818 struct syscall_arg *arg);
819
820 #define SCA_FILENAME syscall_arg__scnprintf_filename
821
822 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
823 struct syscall_arg *arg)
824 {
825 bool show_prefix = arg->show_string_prefix;
826 const char *prefix = "O_";
827 int printed = 0, flags = arg->val;
828
829 #define P_FLAG(n) \
830 if (flags & O_##n) { \
831 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
832 flags &= ~O_##n; \
833 }
834
835 P_FLAG(CLOEXEC);
836 P_FLAG(NONBLOCK);
837 #undef P_FLAG
838
839 if (flags)
840 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
841
842 return printed;
843 }
844
845 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
846
847 #ifndef GRND_NONBLOCK
848 #define GRND_NONBLOCK 0x0001
849 #endif
850 #ifndef GRND_RANDOM
851 #define GRND_RANDOM 0x0002
852 #endif
853
854 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
855 struct syscall_arg *arg)
856 {
857 bool show_prefix = arg->show_string_prefix;
858 const char *prefix = "GRND_";
859 int printed = 0, flags = arg->val;
860
861 #define P_FLAG(n) \
862 if (flags & GRND_##n) { \
863 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
864 flags &= ~GRND_##n; \
865 }
866
867 P_FLAG(RANDOM);
868 P_FLAG(NONBLOCK);
869 #undef P_FLAG
870
871 if (flags)
872 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
873
874 return printed;
875 }
876
877 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
878
879 #define STRARRAY(name, array) \
880 { .scnprintf = SCA_STRARRAY, \
881 .strtoul = STUL_STRARRAY, \
882 .parm = &strarray__##array, }
883
884 #define STRARRAY_FLAGS(name, array) \
885 { .scnprintf = SCA_STRARRAY_FLAGS, \
886 .strtoul = STUL_STRARRAY_FLAGS, \
887 .parm = &strarray__##array, }
888
889 #include "trace/beauty/arch_errno_names.c"
890 #include "trace/beauty/eventfd.c"
891 #include "trace/beauty/futex_op.c"
892 #include "trace/beauty/futex_val3.c"
893 #include "trace/beauty/mmap.c"
894 #include "trace/beauty/mode_t.c"
895 #include "trace/beauty/msg_flags.c"
896 #include "trace/beauty/open_flags.c"
897 #include "trace/beauty/perf_event_open.c"
898 #include "trace/beauty/pid.c"
899 #include "trace/beauty/sched_policy.c"
900 #include "trace/beauty/seccomp.c"
901 #include "trace/beauty/signum.c"
902 #include "trace/beauty/socket_type.c"
903 #include "trace/beauty/waitid_options.c"
904
905 static struct syscall_fmt syscall_fmts[] = {
906 { .name = "access",
907 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
908 { .name = "arch_prctl",
909 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
910 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
911 { .name = "bind",
912 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
913 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
914 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
915 { .name = "bpf",
916 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
917 { .name = "brk", .hexret = true,
918 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
919 { .name = "clock_gettime",
920 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
921 { .name = "clone", .errpid = true, .nr_args = 5,
922 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
923 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
924 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
925 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
926 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
927 { .name = "close",
928 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
929 { .name = "connect",
930 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
931 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
932 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
933 { .name = "epoll_ctl",
934 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
935 { .name = "eventfd2",
936 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
937 { .name = "fchmodat",
938 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
939 { .name = "fchownat",
940 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
941 { .name = "fcntl",
942 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
943 .strtoul = STUL_STRARRAYS,
944 .parm = &strarrays__fcntl_cmds_arrays,
945 .show_zero = true, },
946 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
947 { .name = "flock",
948 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
949 { .name = "fsconfig",
950 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
951 { .name = "fsmount",
952 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
953 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
954 { .name = "fspick",
955 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
956 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
957 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
958 { .name = "fstat", .alias = "newfstat", },
959 { .name = "fstatat", .alias = "newfstatat", },
960 { .name = "futex",
961 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
962 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
963 { .name = "futimesat",
964 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
965 { .name = "getitimer",
966 .arg = { [0] = STRARRAY(which, itimers), }, },
967 { .name = "getpid", .errpid = true, },
968 { .name = "getpgid", .errpid = true, },
969 { .name = "getppid", .errpid = true, },
970 { .name = "getrandom",
971 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
972 { .name = "getrlimit",
973 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
974 { .name = "gettid", .errpid = true, },
975 { .name = "ioctl",
976 .arg = {
977 #if defined(__i386__) || defined(__x86_64__)
978 /*
979 * FIXME: Make this available to all arches.
980 */
981 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
982 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
983 #else
984 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
985 #endif
986 { .name = "kcmp", .nr_args = 5,
987 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
988 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
989 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
990 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
991 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
992 { .name = "keyctl",
993 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
994 { .name = "kill",
995 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
996 { .name = "linkat",
997 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
998 { .name = "lseek",
999 .arg = { [2] = STRARRAY(whence, whences), }, },
1000 { .name = "lstat", .alias = "newlstat", },
1001 { .name = "madvise",
1002 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1003 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1004 { .name = "mkdirat",
1005 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1006 { .name = "mknodat",
1007 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1008 { .name = "mmap", .hexret = true,
1009 /* The standard mmap maps to old_mmap on s390x */
1010 #if defined(__s390x__)
1011 .alias = "old_mmap",
1012 #endif
1013 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1014 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1015 .strtoul = STUL_STRARRAY_FLAGS,
1016 .parm = &strarray__mmap_flags, },
1017 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1018 { .name = "mount",
1019 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1020 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1021 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1022 { .name = "move_mount",
1023 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1024 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1025 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1026 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1027 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1028 { .name = "mprotect",
1029 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1030 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1031 { .name = "mq_unlink",
1032 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1033 { .name = "mremap", .hexret = true,
1034 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1035 { .name = "name_to_handle_at",
1036 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1037 { .name = "newfstatat",
1038 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1039 { .name = "open",
1040 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1041 { .name = "open_by_handle_at",
1042 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1043 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1044 { .name = "openat",
1045 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1046 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1047 { .name = "perf_event_open",
1048 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
1049 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1050 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1051 { .name = "pipe2",
1052 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1053 { .name = "pkey_alloc",
1054 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1055 { .name = "pkey_free",
1056 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1057 { .name = "pkey_mprotect",
1058 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1059 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1060 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1061 { .name = "poll", .timeout = true, },
1062 { .name = "ppoll", .timeout = true, },
1063 { .name = "prctl",
1064 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1065 .strtoul = STUL_STRARRAY,
1066 .parm = &strarray__prctl_options, },
1067 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1068 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1069 { .name = "pread", .alias = "pread64", },
1070 { .name = "preadv", .alias = "pread", },
1071 { .name = "prlimit64",
1072 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1073 { .name = "pwrite", .alias = "pwrite64", },
1074 { .name = "readlinkat",
1075 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1076 { .name = "recvfrom",
1077 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1078 { .name = "recvmmsg",
1079 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1080 { .name = "recvmsg",
1081 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1082 { .name = "renameat",
1083 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1084 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1085 { .name = "renameat2",
1086 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1087 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1088 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1089 { .name = "rt_sigaction",
1090 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1091 { .name = "rt_sigprocmask",
1092 .arg = { [0] = STRARRAY(how, sighow), }, },
1093 { .name = "rt_sigqueueinfo",
1094 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1095 { .name = "rt_tgsigqueueinfo",
1096 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1097 { .name = "sched_setscheduler",
1098 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1099 { .name = "seccomp",
1100 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1101 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1102 { .name = "select", .timeout = true, },
1103 { .name = "sendfile", .alias = "sendfile64", },
1104 { .name = "sendmmsg",
1105 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1106 { .name = "sendmsg",
1107 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1108 { .name = "sendto",
1109 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1110 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1111 { .name = "set_tid_address", .errpid = true, },
1112 { .name = "setitimer",
1113 .arg = { [0] = STRARRAY(which, itimers), }, },
1114 { .name = "setrlimit",
1115 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1116 { .name = "socket",
1117 .arg = { [0] = STRARRAY(family, socket_families),
1118 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1119 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1120 { .name = "socketpair",
1121 .arg = { [0] = STRARRAY(family, socket_families),
1122 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1123 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1124 { .name = "stat", .alias = "newstat", },
1125 { .name = "statx",
1126 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1127 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1128 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1129 { .name = "swapoff",
1130 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1131 { .name = "swapon",
1132 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1133 { .name = "symlinkat",
1134 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1135 { .name = "sync_file_range",
1136 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1137 { .name = "tgkill",
1138 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1139 { .name = "tkill",
1140 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1141 { .name = "umount2", .alias = "umount",
1142 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1143 { .name = "uname", .alias = "newuname", },
1144 { .name = "unlinkat",
1145 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1146 { .name = "utimensat",
1147 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1148 { .name = "wait4", .errpid = true,
1149 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1150 { .name = "waitid", .errpid = true,
1151 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1152 };
1153
1154 static int syscall_fmt__cmp(const void *name, const void *fmtp)
1155 {
1156 const struct syscall_fmt *fmt = fmtp;
1157 return strcmp(name, fmt->name);
1158 }
1159
1160 static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name)
1161 {
1162 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1163 }
1164
1165 static struct syscall_fmt *syscall_fmt__find(const char *name)
1166 {
1167 const int nmemb = ARRAY_SIZE(syscall_fmts);
1168 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1169 }
1170
1171 static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
1172 {
1173 int i;
1174
1175 for (i = 0; i < nmemb; ++i) {
1176 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1177 return &fmts[i];
1178 }
1179
1180 return NULL;
1181 }
1182
1183 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1184 {
1185 const int nmemb = ARRAY_SIZE(syscall_fmts);
1186 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1187 }
1188
1189 /*
1190 * is_exit: is this "exit" or "exit_group"?
1191 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1192 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1193 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1194 */
1195 struct syscall {
1196 struct tep_event *tp_format;
1197 int nr_args;
1198 int args_size;
1199 struct {
1200 struct bpf_program *sys_enter,
1201 *sys_exit;
1202 } bpf_prog;
1203 bool is_exit;
1204 bool is_open;
1205 bool nonexistent;
1206 struct tep_format_field *args;
1207 const char *name;
1208 struct syscall_fmt *fmt;
1209 struct syscall_arg_fmt *arg_fmt;
1210 };
1211
1212 /*
1213 * Must match what is in the BPF program:
1214 *
1215 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1216 */
1217 struct bpf_map_syscall_entry {
1218 bool enabled;
1219 u16 string_args_len[6];
1220 };
1221
1222 /*
1223 * We need to have this 'calculated' boolean because in some cases we really
1224 * don't know what is the duration of a syscall, for instance, when we start
1225 * a session and some threads are waiting for a syscall to finish, say 'poll',
1226 * in which case all we can do is to print "( ? ) for duration and for the
1227 * start timestamp.
1228 */
1229 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1230 {
1231 double duration = (double)t / NSEC_PER_MSEC;
1232 size_t printed = fprintf(fp, "(");
1233
1234 if (!calculated)
1235 printed += fprintf(fp, " ");
1236 else if (duration >= 1.0)
1237 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1238 else if (duration >= 0.01)
1239 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1240 else
1241 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1242 return printed + fprintf(fp, "): ");
1243 }
1244
1245 /**
1246 * filename.ptr: The filename char pointer that will be vfs_getname'd
1247 * filename.entry_str_pos: Where to insert the string translated from
1248 * filename.ptr by the vfs_getname tracepoint/kprobe.
1249 * ret_scnprintf: syscall args may set this to a different syscall return
1250 * formatter, for instance, fcntl may return fds, file flags, etc.
1251 */
1252 struct thread_trace {
1253 u64 entry_time;
1254 bool entry_pending;
1255 unsigned long nr_events;
1256 unsigned long pfmaj, pfmin;
1257 char *entry_str;
1258 double runtime_ms;
1259 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1260 struct {
1261 unsigned long ptr;
1262 short int entry_str_pos;
1263 bool pending_open;
1264 unsigned int namelen;
1265 char *name;
1266 } filename;
1267 struct {
1268 int max;
1269 struct file *table;
1270 } files;
1271
1272 struct intlist *syscall_stats;
1273 };
1274
1275 static struct thread_trace *thread_trace__new(void)
1276 {
1277 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1278
1279 if (ttrace) {
1280 ttrace->files.max = -1;
1281 ttrace->syscall_stats = intlist__new(NULL);
1282 }
1283
1284 return ttrace;
1285 }
1286
1287 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1288 {
1289 struct thread_trace *ttrace;
1290
1291 if (thread == NULL)
1292 goto fail;
1293
1294 if (thread__priv(thread) == NULL)
1295 thread__set_priv(thread, thread_trace__new());
1296
1297 if (thread__priv(thread) == NULL)
1298 goto fail;
1299
1300 ttrace = thread__priv(thread);
1301 ++ttrace->nr_events;
1302
1303 return ttrace;
1304 fail:
1305 color_fprintf(fp, PERF_COLOR_RED,
1306 "WARNING: not enough memory, dropping samples!\n");
1307 return NULL;
1308 }
1309
1310
1311 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1312 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1313 {
1314 struct thread_trace *ttrace = thread__priv(arg->thread);
1315
1316 ttrace->ret_scnprintf = ret_scnprintf;
1317 }
1318
1319 #define TRACE_PFMAJ (1 << 0)
1320 #define TRACE_PFMIN (1 << 1)
1321
1322 static const size_t trace__entry_str_size = 2048;
1323
1324 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1325 {
1326 if (fd < 0)
1327 return NULL;
1328
1329 if (fd > ttrace->files.max) {
1330 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1331
1332 if (nfiles == NULL)
1333 return NULL;
1334
1335 if (ttrace->files.max != -1) {
1336 memset(nfiles + ttrace->files.max + 1, 0,
1337 (fd - ttrace->files.max) * sizeof(struct file));
1338 } else {
1339 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1340 }
1341
1342 ttrace->files.table = nfiles;
1343 ttrace->files.max = fd;
1344 }
1345
1346 return ttrace->files.table + fd;
1347 }
1348
1349 struct file *thread__files_entry(struct thread *thread, int fd)
1350 {
1351 return thread_trace__files_entry(thread__priv(thread), fd);
1352 }
1353
1354 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1355 {
1356 struct thread_trace *ttrace = thread__priv(thread);
1357 struct file *file = thread_trace__files_entry(ttrace, fd);
1358
1359 if (file != NULL) {
1360 struct stat st;
1361 if (stat(pathname, &st) == 0)
1362 file->dev_maj = major(st.st_rdev);
1363 file->pathname = strdup(pathname);
1364 if (file->pathname)
1365 return 0;
1366 }
1367
1368 return -1;
1369 }
1370
1371 static int thread__read_fd_path(struct thread *thread, int fd)
1372 {
1373 char linkname[PATH_MAX], pathname[PATH_MAX];
1374 struct stat st;
1375 int ret;
1376
1377 if (thread->pid_ == thread->tid) {
1378 scnprintf(linkname, sizeof(linkname),
1379 "/proc/%d/fd/%d", thread->pid_, fd);
1380 } else {
1381 scnprintf(linkname, sizeof(linkname),
1382 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1383 }
1384
1385 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1386 return -1;
1387
1388 ret = readlink(linkname, pathname, sizeof(pathname));
1389
1390 if (ret < 0 || ret > st.st_size)
1391 return -1;
1392
1393 pathname[ret] = '\0';
1394 return trace__set_fd_pathname(thread, fd, pathname);
1395 }
1396
1397 static const char *thread__fd_path(struct thread *thread, int fd,
1398 struct trace *trace)
1399 {
1400 struct thread_trace *ttrace = thread__priv(thread);
1401
1402 if (ttrace == NULL || trace->fd_path_disabled)
1403 return NULL;
1404
1405 if (fd < 0)
1406 return NULL;
1407
1408 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1409 if (!trace->live)
1410 return NULL;
1411 ++trace->stats.proc_getname;
1412 if (thread__read_fd_path(thread, fd))
1413 return NULL;
1414 }
1415
1416 return ttrace->files.table[fd].pathname;
1417 }
1418
1419 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1420 {
1421 int fd = arg->val;
1422 size_t printed = scnprintf(bf, size, "%d", fd);
1423 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1424
1425 if (path)
1426 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1427
1428 return printed;
1429 }
1430
1431 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1432 {
1433 size_t printed = scnprintf(bf, size, "%d", fd);
1434 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1435
1436 if (thread) {
1437 const char *path = thread__fd_path(thread, fd, trace);
1438
1439 if (path)
1440 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1441
1442 thread__put(thread);
1443 }
1444
1445 return printed;
1446 }
1447
1448 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1449 struct syscall_arg *arg)
1450 {
1451 int fd = arg->val;
1452 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1453 struct thread_trace *ttrace = thread__priv(arg->thread);
1454
1455 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1456 zfree(&ttrace->files.table[fd].pathname);
1457
1458 return printed;
1459 }
1460
1461 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1462 unsigned long ptr)
1463 {
1464 struct thread_trace *ttrace = thread__priv(thread);
1465
1466 ttrace->filename.ptr = ptr;
1467 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1468 }
1469
1470 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1471 {
1472 struct augmented_arg *augmented_arg = arg->augmented.args;
1473 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1474 /*
1475 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1476 * we would have two strings, each prefixed by its size.
1477 */
1478 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1479
1480 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1481 arg->augmented.size -= consumed;
1482
1483 return printed;
1484 }
1485
1486 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1487 struct syscall_arg *arg)
1488 {
1489 unsigned long ptr = arg->val;
1490
1491 if (arg->augmented.args)
1492 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1493
1494 if (!arg->trace->vfs_getname)
1495 return scnprintf(bf, size, "%#x", ptr);
1496
1497 thread__set_filename_pos(arg->thread, bf, ptr);
1498 return 0;
1499 }
1500
1501 static bool trace__filter_duration(struct trace *trace, double t)
1502 {
1503 return t < (trace->duration_filter * NSEC_PER_MSEC);
1504 }
1505
1506 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1507 {
1508 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1509
1510 return fprintf(fp, "%10.3f ", ts);
1511 }
1512
1513 /*
1514 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1515 * using ttrace->entry_time for a thread that receives a sys_exit without
1516 * first having received a sys_enter ("poll" issued before tracing session
1517 * starts, lost sys_enter exit due to ring buffer overflow).
1518 */
1519 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1520 {
1521 if (tstamp > 0)
1522 return __trace__fprintf_tstamp(trace, tstamp, fp);
1523
1524 return fprintf(fp, " ? ");
1525 }
1526
1527 static bool done = false;
1528 static bool interrupted = false;
1529
1530 static void sig_handler(int sig)
1531 {
1532 done = true;
1533 interrupted = sig == SIGINT;
1534 }
1535
1536 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1537 {
1538 size_t printed = 0;
1539
1540 if (trace->multiple_threads) {
1541 if (trace->show_comm)
1542 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1543 printed += fprintf(fp, "%d ", thread->tid);
1544 }
1545
1546 return printed;
1547 }
1548
1549 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1550 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1551 {
1552 size_t printed = 0;
1553
1554 if (trace->show_tstamp)
1555 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1556 if (trace->show_duration)
1557 printed += fprintf_duration(duration, duration_calculated, fp);
1558 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1559 }
1560
1561 static int trace__process_event(struct trace *trace, struct machine *machine,
1562 union perf_event *event, struct perf_sample *sample)
1563 {
1564 int ret = 0;
1565
1566 switch (event->header.type) {
1567 case PERF_RECORD_LOST:
1568 color_fprintf(trace->output, PERF_COLOR_RED,
1569 "LOST %" PRIu64 " events!\n", event->lost.lost);
1570 ret = machine__process_lost_event(machine, event, sample);
1571 break;
1572 default:
1573 ret = machine__process_event(machine, event, sample);
1574 break;
1575 }
1576
1577 return ret;
1578 }
1579
1580 static int trace__tool_process(struct perf_tool *tool,
1581 union perf_event *event,
1582 struct perf_sample *sample,
1583 struct machine *machine)
1584 {
1585 struct trace *trace = container_of(tool, struct trace, tool);
1586 return trace__process_event(trace, machine, event, sample);
1587 }
1588
1589 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1590 {
1591 struct machine *machine = vmachine;
1592
1593 if (machine->kptr_restrict_warned)
1594 return NULL;
1595
1596 if (symbol_conf.kptr_restrict) {
1597 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1598 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1599 "Kernel samples will not be resolved.\n");
1600 machine->kptr_restrict_warned = true;
1601 return NULL;
1602 }
1603
1604 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1605 }
1606
1607 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1608 {
1609 int err = symbol__init(NULL);
1610
1611 if (err)
1612 return err;
1613
1614 trace->host = machine__new_host();
1615 if (trace->host == NULL)
1616 return -ENOMEM;
1617
1618 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1619 if (err < 0)
1620 goto out;
1621
1622 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1623 evlist->core.threads, trace__tool_process, false,
1624 1);
1625 out:
1626 if (err)
1627 symbol__exit();
1628
1629 return err;
1630 }
1631
1632 static void trace__symbols__exit(struct trace *trace)
1633 {
1634 machine__exit(trace->host);
1635 trace->host = NULL;
1636
1637 symbol__exit();
1638 }
1639
1640 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1641 {
1642 int idx;
1643
1644 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1645 nr_args = sc->fmt->nr_args;
1646
1647 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1648 if (sc->arg_fmt == NULL)
1649 return -1;
1650
1651 for (idx = 0; idx < nr_args; ++idx) {
1652 if (sc->fmt)
1653 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1654 }
1655
1656 sc->nr_args = nr_args;
1657 return 0;
1658 }
1659
1660 static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1661 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1662 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1663 };
1664
1665 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1666 {
1667 const struct syscall_arg_fmt *fmt = fmtp;
1668 return strcmp(name, fmt->name);
1669 }
1670
1671 static struct syscall_arg_fmt *
1672 __syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
1673 {
1674 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1675 }
1676
1677 static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1678 {
1679 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1680 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1681 }
1682
1683 static struct tep_format_field *
1684 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1685 {
1686 struct tep_format_field *last_field = NULL;
1687 int len;
1688
1689 for (; field; field = field->next, ++arg) {
1690 last_field = field;
1691
1692 if (arg->scnprintf)
1693 continue;
1694
1695 len = strlen(field->name);
1696
1697 if (strcmp(field->type, "const char *") == 0 &&
1698 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1699 strstr(field->name, "path") != NULL))
1700 arg->scnprintf = SCA_FILENAME;
1701 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1702 arg->scnprintf = SCA_PTR;
1703 else if (strcmp(field->type, "pid_t") == 0)
1704 arg->scnprintf = SCA_PID;
1705 else if (strcmp(field->type, "umode_t") == 0)
1706 arg->scnprintf = SCA_MODE_T;
1707 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1708 arg->scnprintf = SCA_CHAR_ARRAY;
1709 arg->nr_entries = field->arraylen;
1710 } else if ((strcmp(field->type, "int") == 0 ||
1711 strcmp(field->type, "unsigned int") == 0 ||
1712 strcmp(field->type, "long") == 0) &&
1713 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1714 /*
1715 * /sys/kernel/tracing/events/syscalls/sys_enter*
1716 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1717 * 65 int
1718 * 23 unsigned int
1719 * 7 unsigned long
1720 */
1721 arg->scnprintf = SCA_FD;
1722 } else {
1723 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
1724
1725 if (fmt) {
1726 arg->scnprintf = fmt->scnprintf;
1727 arg->strtoul = fmt->strtoul;
1728 }
1729 }
1730 }
1731
1732 return last_field;
1733 }
1734
1735 static int syscall__set_arg_fmts(struct syscall *sc)
1736 {
1737 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1738
1739 if (last_field)
1740 sc->args_size = last_field->offset + last_field->size;
1741
1742 return 0;
1743 }
1744
1745 static int trace__read_syscall_info(struct trace *trace, int id)
1746 {
1747 char tp_name[128];
1748 struct syscall *sc;
1749 const char *name = syscalltbl__name(trace->sctbl, id);
1750
1751 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
1752 if (trace->syscalls.table == NULL) {
1753 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1754 if (trace->syscalls.table == NULL)
1755 return -ENOMEM;
1756 }
1757 #else
1758 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
1759 // When using libaudit we don't know beforehand what is the max syscall id
1760 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1761
1762 if (table == NULL)
1763 return -ENOMEM;
1764
1765 memset(table + trace->sctbl->syscalls.max_id, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1766
1767 trace->syscalls.table = table;
1768 trace->sctbl->syscalls.max_id = id;
1769 }
1770 #endif
1771 sc = trace->syscalls.table + id;
1772 if (sc->nonexistent)
1773 return 0;
1774
1775 if (name == NULL) {
1776 sc->nonexistent = true;
1777 return 0;
1778 }
1779
1780 sc->name = name;
1781 sc->fmt = syscall_fmt__find(sc->name);
1782
1783 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1784 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1785
1786 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1787 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1788 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1789 }
1790
1791 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1792 return -ENOMEM;
1793
1794 if (IS_ERR(sc->tp_format))
1795 return PTR_ERR(sc->tp_format);
1796
1797 sc->args = sc->tp_format->format.fields;
1798 /*
1799 * We need to check and discard the first variable '__syscall_nr'
1800 * or 'nr' that mean the syscall number. It is needless here.
1801 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1802 */
1803 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1804 sc->args = sc->args->next;
1805 --sc->nr_args;
1806 }
1807
1808 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1809 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1810
1811 return syscall__set_arg_fmts(sc);
1812 }
1813
1814 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1815 {
1816 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1817
1818 if (fmt != NULL) {
1819 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1820 return 0;
1821 }
1822
1823 return -ENOMEM;
1824 }
1825
1826 static int intcmp(const void *a, const void *b)
1827 {
1828 const int *one = a, *another = b;
1829
1830 return *one - *another;
1831 }
1832
1833 static int trace__validate_ev_qualifier(struct trace *trace)
1834 {
1835 int err = 0;
1836 bool printed_invalid_prefix = false;
1837 struct str_node *pos;
1838 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1839
1840 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1841 sizeof(trace->ev_qualifier_ids.entries[0]));
1842
1843 if (trace->ev_qualifier_ids.entries == NULL) {
1844 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1845 trace->output);
1846 err = -EINVAL;
1847 goto out;
1848 }
1849
1850 strlist__for_each_entry(pos, trace->ev_qualifier) {
1851 const char *sc = pos->s;
1852 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1853
1854 if (id < 0) {
1855 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1856 if (id >= 0)
1857 goto matches;
1858
1859 if (!printed_invalid_prefix) {
1860 pr_debug("Skipping unknown syscalls: ");
1861 printed_invalid_prefix = true;
1862 } else {
1863 pr_debug(", ");
1864 }
1865
1866 pr_debug("%s", sc);
1867 continue;
1868 }
1869 matches:
1870 trace->ev_qualifier_ids.entries[nr_used++] = id;
1871 if (match_next == -1)
1872 continue;
1873
1874 while (1) {
1875 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1876 if (id < 0)
1877 break;
1878 if (nr_allocated == nr_used) {
1879 void *entries;
1880
1881 nr_allocated += 8;
1882 entries = realloc(trace->ev_qualifier_ids.entries,
1883 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1884 if (entries == NULL) {
1885 err = -ENOMEM;
1886 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1887 goto out_free;
1888 }
1889 trace->ev_qualifier_ids.entries = entries;
1890 }
1891 trace->ev_qualifier_ids.entries[nr_used++] = id;
1892 }
1893 }
1894
1895 trace->ev_qualifier_ids.nr = nr_used;
1896 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1897 out:
1898 if (printed_invalid_prefix)
1899 pr_debug("\n");
1900 return err;
1901 out_free:
1902 zfree(&trace->ev_qualifier_ids.entries);
1903 trace->ev_qualifier_ids.nr = 0;
1904 goto out;
1905 }
1906
1907 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1908 {
1909 bool in_ev_qualifier;
1910
1911 if (trace->ev_qualifier_ids.nr == 0)
1912 return true;
1913
1914 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1915 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1916
1917 if (in_ev_qualifier)
1918 return !trace->not_ev_qualifier;
1919
1920 return trace->not_ev_qualifier;
1921 }
1922
1923 /*
1924 * args is to be interpreted as a series of longs but we need to handle
1925 * 8-byte unaligned accesses. args points to raw_data within the event
1926 * and raw_data is guaranteed to be 8-byte unaligned because it is
1927 * preceded by raw_size which is a u32. So we need to copy args to a temp
1928 * variable to read it. Most notably this avoids extended load instructions
1929 * on unaligned addresses
1930 */
1931 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1932 {
1933 unsigned long val;
1934 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1935
1936 memcpy(&val, p, sizeof(val));
1937 return val;
1938 }
1939
1940 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1941 struct syscall_arg *arg)
1942 {
1943 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1944 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1945
1946 return scnprintf(bf, size, "arg%d: ", arg->idx);
1947 }
1948
1949 /*
1950 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1951 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1952 * in tools/perf/trace/beauty/mount_flags.c
1953 */
1954 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1955 {
1956 if (fmt && fmt->mask_val)
1957 return fmt->mask_val(arg, val);
1958
1959 return val;
1960 }
1961
1962 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1963 struct syscall_arg *arg, unsigned long val)
1964 {
1965 if (fmt && fmt->scnprintf) {
1966 arg->val = val;
1967 if (fmt->parm)
1968 arg->parm = fmt->parm;
1969 return fmt->scnprintf(bf, size, arg);
1970 }
1971 return scnprintf(bf, size, "%ld", val);
1972 }
1973
1974 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1975 unsigned char *args, void *augmented_args, int augmented_args_size,
1976 struct trace *trace, struct thread *thread)
1977 {
1978 size_t printed = 0;
1979 unsigned long val;
1980 u8 bit = 1;
1981 struct syscall_arg arg = {
1982 .args = args,
1983 .augmented = {
1984 .size = augmented_args_size,
1985 .args = augmented_args,
1986 },
1987 .idx = 0,
1988 .mask = 0,
1989 .trace = trace,
1990 .thread = thread,
1991 .show_string_prefix = trace->show_string_prefix,
1992 };
1993 struct thread_trace *ttrace = thread__priv(thread);
1994
1995 /*
1996 * Things like fcntl will set this in its 'cmd' formatter to pick the
1997 * right formatter for the return value (an fd? file flags?), which is
1998 * not needed for syscalls that always return a given type, say an fd.
1999 */
2000 ttrace->ret_scnprintf = NULL;
2001
2002 if (sc->args != NULL) {
2003 struct tep_format_field *field;
2004
2005 for (field = sc->args; field;
2006 field = field->next, ++arg.idx, bit <<= 1) {
2007 if (arg.mask & bit)
2008 continue;
2009
2010 arg.fmt = &sc->arg_fmt[arg.idx];
2011 val = syscall_arg__val(&arg, arg.idx);
2012 /*
2013 * Some syscall args need some mask, most don't and
2014 * return val untouched.
2015 */
2016 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2017
2018 /*
2019 * Suppress this argument if its value is zero and
2020 * and we don't have a string associated in an
2021 * strarray for it.
2022 */
2023 if (val == 0 &&
2024 !trace->show_zeros &&
2025 !(sc->arg_fmt &&
2026 (sc->arg_fmt[arg.idx].show_zero ||
2027 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2028 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2029 sc->arg_fmt[arg.idx].parm))
2030 continue;
2031
2032 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2033
2034 if (trace->show_arg_names)
2035 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2036
2037 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2038 bf + printed, size - printed, &arg, val);
2039 }
2040 } else if (IS_ERR(sc->tp_format)) {
2041 /*
2042 * If we managed to read the tracepoint /format file, then we
2043 * may end up not having any args, like with gettid(), so only
2044 * print the raw args when we didn't manage to read it.
2045 */
2046 while (arg.idx < sc->nr_args) {
2047 if (arg.mask & bit)
2048 goto next_arg;
2049 val = syscall_arg__val(&arg, arg.idx);
2050 if (printed)
2051 printed += scnprintf(bf + printed, size - printed, ", ");
2052 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2053 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2054 next_arg:
2055 ++arg.idx;
2056 bit <<= 1;
2057 }
2058 }
2059
2060 return printed;
2061 }
2062
2063 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2064 union perf_event *event,
2065 struct perf_sample *sample);
2066
2067 static struct syscall *trace__syscall_info(struct trace *trace,
2068 struct evsel *evsel, int id)
2069 {
2070 int err = 0;
2071
2072 if (id < 0) {
2073
2074 /*
2075 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2076 * before that, leaving at a higher verbosity level till that is
2077 * explained. Reproduced with plain ftrace with:
2078 *
2079 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2080 * grep "NR -1 " /t/trace_pipe
2081 *
2082 * After generating some load on the machine.
2083 */
2084 if (verbose > 1) {
2085 static u64 n;
2086 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2087 id, evsel__name(evsel), ++n);
2088 }
2089 return NULL;
2090 }
2091
2092 err = -EINVAL;
2093
2094 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
2095 if (id > trace->sctbl->syscalls.max_id) {
2096 #else
2097 if (id >= trace->sctbl->syscalls.max_id) {
2098 /*
2099 * With libaudit we don't know beforehand what is the max_id,
2100 * so we let trace__read_syscall_info() figure that out as we
2101 * go on reading syscalls.
2102 */
2103 err = trace__read_syscall_info(trace, id);
2104 if (err)
2105 #endif
2106 goto out_cant_read;
2107 }
2108
2109 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2110 (err = trace__read_syscall_info(trace, id)) != 0)
2111 goto out_cant_read;
2112
2113 if (trace->syscalls.table[id].name == NULL) {
2114 if (trace->syscalls.table[id].nonexistent)
2115 return NULL;
2116 goto out_cant_read;
2117 }
2118
2119 return &trace->syscalls.table[id];
2120
2121 out_cant_read:
2122 if (verbose > 0) {
2123 char sbuf[STRERR_BUFSIZE];
2124 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2125 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2126 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2127 fputs(" information\n", trace->output);
2128 }
2129 return NULL;
2130 }
2131
2132 struct syscall_stats {
2133 struct stats stats;
2134 u64 nr_failures;
2135 int max_errno;
2136 u32 *errnos;
2137 };
2138
2139 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2140 int id, struct perf_sample *sample, long err, bool errno_summary)
2141 {
2142 struct int_node *inode;
2143 struct syscall_stats *stats;
2144 u64 duration = 0;
2145
2146 inode = intlist__findnew(ttrace->syscall_stats, id);
2147 if (inode == NULL)
2148 return;
2149
2150 stats = inode->priv;
2151 if (stats == NULL) {
2152 stats = malloc(sizeof(*stats));
2153 if (stats == NULL)
2154 return;
2155
2156 stats->nr_failures = 0;
2157 stats->max_errno = 0;
2158 stats->errnos = NULL;
2159 init_stats(&stats->stats);
2160 inode->priv = stats;
2161 }
2162
2163 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2164 duration = sample->time - ttrace->entry_time;
2165
2166 update_stats(&stats->stats, duration);
2167
2168 if (err < 0) {
2169 ++stats->nr_failures;
2170
2171 if (!errno_summary)
2172 return;
2173
2174 err = -err;
2175 if (err > stats->max_errno) {
2176 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2177
2178 if (new_errnos) {
2179 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2180 } else {
2181 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2182 thread__comm_str(thread), thread->pid_, thread->tid);
2183 return;
2184 }
2185
2186 stats->errnos = new_errnos;
2187 stats->max_errno = err;
2188 }
2189
2190 ++stats->errnos[err - 1];
2191 }
2192 }
2193
2194 static int trace__printf_interrupted_entry(struct trace *trace)
2195 {
2196 struct thread_trace *ttrace;
2197 size_t printed;
2198 int len;
2199
2200 if (trace->failure_only || trace->current == NULL)
2201 return 0;
2202
2203 ttrace = thread__priv(trace->current);
2204
2205 if (!ttrace->entry_pending)
2206 return 0;
2207
2208 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2209 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2210
2211 if (len < trace->args_alignment - 4)
2212 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2213
2214 printed += fprintf(trace->output, " ...\n");
2215
2216 ttrace->entry_pending = false;
2217 ++trace->nr_events_printed;
2218
2219 return printed;
2220 }
2221
2222 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2223 struct perf_sample *sample, struct thread *thread)
2224 {
2225 int printed = 0;
2226
2227 if (trace->print_sample) {
2228 double ts = (double)sample->time / NSEC_PER_MSEC;
2229
2230 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2231 evsel__name(evsel), ts,
2232 thread__comm_str(thread),
2233 sample->pid, sample->tid, sample->cpu);
2234 }
2235
2236 return printed;
2237 }
2238
2239 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2240 {
2241 void *augmented_args = NULL;
2242 /*
2243 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2244 * and there we get all 6 syscall args plus the tracepoint common fields
2245 * that gets calculated at the start and the syscall_nr (another long).
2246 * So we check if that is the case and if so don't look after the
2247 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2248 * which is fixed.
2249 *
2250 * We'll revisit this later to pass s->args_size to the BPF augmenter
2251 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2252 * copies only what we need for each syscall, like what happens when we
2253 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2254 * traffic to just what is needed for each syscall.
2255 */
2256 int args_size = raw_augmented_args_size ?: sc->args_size;
2257
2258 *augmented_args_size = sample->raw_size - args_size;
2259 if (*augmented_args_size > 0)
2260 augmented_args = sample->raw_data + args_size;
2261
2262 return augmented_args;
2263 }
2264
2265 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2266 union perf_event *event __maybe_unused,
2267 struct perf_sample *sample)
2268 {
2269 char *msg;
2270 void *args;
2271 int printed = 0;
2272 struct thread *thread;
2273 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2274 int augmented_args_size = 0;
2275 void *augmented_args = NULL;
2276 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2277 struct thread_trace *ttrace;
2278
2279 if (sc == NULL)
2280 return -1;
2281
2282 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2283 ttrace = thread__trace(thread, trace->output);
2284 if (ttrace == NULL)
2285 goto out_put;
2286
2287 trace__fprintf_sample(trace, evsel, sample, thread);
2288
2289 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2290
2291 if (ttrace->entry_str == NULL) {
2292 ttrace->entry_str = malloc(trace__entry_str_size);
2293 if (!ttrace->entry_str)
2294 goto out_put;
2295 }
2296
2297 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2298 trace__printf_interrupted_entry(trace);
2299 /*
2300 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2301 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2302 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2303 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2304 * so when handling, say the openat syscall, we end up getting 6 args for the
2305 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2306 * thinking that the extra 2 u64 args are the augmented filename, so just check
2307 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2308 */
2309 if (evsel != trace->syscalls.events.sys_enter)
2310 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2311 ttrace->entry_time = sample->time;
2312 msg = ttrace->entry_str;
2313 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2314
2315 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2316 args, augmented_args, augmented_args_size, trace, thread);
2317
2318 if (sc->is_exit) {
2319 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2320 int alignment = 0;
2321
2322 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2323 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2324 if (trace->args_alignment > printed)
2325 alignment = trace->args_alignment - printed;
2326 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2327 }
2328 } else {
2329 ttrace->entry_pending = true;
2330 /* See trace__vfs_getname & trace__sys_exit */
2331 ttrace->filename.pending_open = false;
2332 }
2333
2334 if (trace->current != thread) {
2335 thread__put(trace->current);
2336 trace->current = thread__get(thread);
2337 }
2338 err = 0;
2339 out_put:
2340 thread__put(thread);
2341 return err;
2342 }
2343
2344 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2345 struct perf_sample *sample)
2346 {
2347 struct thread_trace *ttrace;
2348 struct thread *thread;
2349 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2350 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2351 char msg[1024];
2352 void *args, *augmented_args = NULL;
2353 int augmented_args_size;
2354
2355 if (sc == NULL)
2356 return -1;
2357
2358 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2359 ttrace = thread__trace(thread, trace->output);
2360 /*
2361 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2362 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2363 */
2364 if (ttrace == NULL)
2365 goto out_put;
2366
2367 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2368 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2369 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2370 fprintf(trace->output, "%s", msg);
2371 err = 0;
2372 out_put:
2373 thread__put(thread);
2374 return err;
2375 }
2376
2377 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2378 struct perf_sample *sample,
2379 struct callchain_cursor *cursor)
2380 {
2381 struct addr_location al;
2382 int max_stack = evsel->core.attr.sample_max_stack ?
2383 evsel->core.attr.sample_max_stack :
2384 trace->max_stack;
2385 int err;
2386
2387 if (machine__resolve(trace->host, &al, sample) < 0)
2388 return -1;
2389
2390 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2391 addr_location__put(&al);
2392 return err;
2393 }
2394
2395 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2396 {
2397 /* TODO: user-configurable print_opts */
2398 const unsigned int print_opts = EVSEL__PRINT_SYM |
2399 EVSEL__PRINT_DSO |
2400 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2401
2402 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2403 }
2404
2405 static const char *errno_to_name(struct evsel *evsel, int err)
2406 {
2407 struct perf_env *env = evsel__env(evsel);
2408 const char *arch_name = perf_env__arch(env);
2409
2410 return arch_syscalls__strerrno(arch_name, err);
2411 }
2412
2413 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2414 union perf_event *event __maybe_unused,
2415 struct perf_sample *sample)
2416 {
2417 long ret;
2418 u64 duration = 0;
2419 bool duration_calculated = false;
2420 struct thread *thread;
2421 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2422 int alignment = trace->args_alignment;
2423 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2424 struct thread_trace *ttrace;
2425
2426 if (sc == NULL)
2427 return -1;
2428
2429 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2430 ttrace = thread__trace(thread, trace->output);
2431 if (ttrace == NULL)
2432 goto out_put;
2433
2434 trace__fprintf_sample(trace, evsel, sample, thread);
2435
2436 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2437
2438 if (trace->summary)
2439 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2440
2441 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2442 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2443 ttrace->filename.pending_open = false;
2444 ++trace->stats.vfs_getname;
2445 }
2446
2447 if (ttrace->entry_time) {
2448 duration = sample->time - ttrace->entry_time;
2449 if (trace__filter_duration(trace, duration))
2450 goto out;
2451 duration_calculated = true;
2452 } else if (trace->duration_filter)
2453 goto out;
2454
2455 if (sample->callchain) {
2456 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2457 if (callchain_ret == 0) {
2458 if (callchain_cursor.nr < trace->min_stack)
2459 goto out;
2460 callchain_ret = 1;
2461 }
2462 }
2463
2464 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2465 goto out;
2466
2467 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2468
2469 if (ttrace->entry_pending) {
2470 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2471 } else {
2472 printed += fprintf(trace->output, " ... [");
2473 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2474 printed += 9;
2475 printed += fprintf(trace->output, "]: %s()", sc->name);
2476 }
2477
2478 printed++; /* the closing ')' */
2479
2480 if (alignment > printed)
2481 alignment -= printed;
2482 else
2483 alignment = 0;
2484
2485 fprintf(trace->output, ")%*s= ", alignment, " ");
2486
2487 if (sc->fmt == NULL) {
2488 if (ret < 0)
2489 goto errno_print;
2490 signed_print:
2491 fprintf(trace->output, "%ld", ret);
2492 } else if (ret < 0) {
2493 errno_print: {
2494 char bf[STRERR_BUFSIZE];
2495 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2496 *e = errno_to_name(evsel, -ret);
2497
2498 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2499 }
2500 } else if (ret == 0 && sc->fmt->timeout)
2501 fprintf(trace->output, "0 (Timeout)");
2502 else if (ttrace->ret_scnprintf) {
2503 char bf[1024];
2504 struct syscall_arg arg = {
2505 .val = ret,
2506 .thread = thread,
2507 .trace = trace,
2508 };
2509 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2510 ttrace->ret_scnprintf = NULL;
2511 fprintf(trace->output, "%s", bf);
2512 } else if (sc->fmt->hexret)
2513 fprintf(trace->output, "%#lx", ret);
2514 else if (sc->fmt->errpid) {
2515 struct thread *child = machine__find_thread(trace->host, ret, ret);
2516
2517 if (child != NULL) {
2518 fprintf(trace->output, "%ld", ret);
2519 if (child->comm_set)
2520 fprintf(trace->output, " (%s)", thread__comm_str(child));
2521 thread__put(child);
2522 }
2523 } else
2524 goto signed_print;
2525
2526 fputc('\n', trace->output);
2527
2528 /*
2529 * We only consider an 'event' for the sake of --max-events a non-filtered
2530 * sys_enter + sys_exit and other tracepoint events.
2531 */
2532 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2533 interrupted = true;
2534
2535 if (callchain_ret > 0)
2536 trace__fprintf_callchain(trace, sample);
2537 else if (callchain_ret < 0)
2538 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2539 out:
2540 ttrace->entry_pending = false;
2541 err = 0;
2542 out_put:
2543 thread__put(thread);
2544 return err;
2545 }
2546
2547 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2548 union perf_event *event __maybe_unused,
2549 struct perf_sample *sample)
2550 {
2551 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2552 struct thread_trace *ttrace;
2553 size_t filename_len, entry_str_len, to_move;
2554 ssize_t remaining_space;
2555 char *pos;
2556 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2557
2558 if (!thread)
2559 goto out;
2560
2561 ttrace = thread__priv(thread);
2562 if (!ttrace)
2563 goto out_put;
2564
2565 filename_len = strlen(filename);
2566 if (filename_len == 0)
2567 goto out_put;
2568
2569 if (ttrace->filename.namelen < filename_len) {
2570 char *f = realloc(ttrace->filename.name, filename_len + 1);
2571
2572 if (f == NULL)
2573 goto out_put;
2574
2575 ttrace->filename.namelen = filename_len;
2576 ttrace->filename.name = f;
2577 }
2578
2579 strcpy(ttrace->filename.name, filename);
2580 ttrace->filename.pending_open = true;
2581
2582 if (!ttrace->filename.ptr)
2583 goto out_put;
2584
2585 entry_str_len = strlen(ttrace->entry_str);
2586 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2587 if (remaining_space <= 0)
2588 goto out_put;
2589
2590 if (filename_len > (size_t)remaining_space) {
2591 filename += filename_len - remaining_space;
2592 filename_len = remaining_space;
2593 }
2594
2595 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2596 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2597 memmove(pos + filename_len, pos, to_move);
2598 memcpy(pos, filename, filename_len);
2599
2600 ttrace->filename.ptr = 0;
2601 ttrace->filename.entry_str_pos = 0;
2602 out_put:
2603 thread__put(thread);
2604 out:
2605 return 0;
2606 }
2607
2608 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2609 union perf_event *event __maybe_unused,
2610 struct perf_sample *sample)
2611 {
2612 u64 runtime = evsel__intval(evsel, sample, "runtime");
2613 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2614 struct thread *thread = machine__findnew_thread(trace->host,
2615 sample->pid,
2616 sample->tid);
2617 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2618
2619 if (ttrace == NULL)
2620 goto out_dump;
2621
2622 ttrace->runtime_ms += runtime_ms;
2623 trace->runtime_ms += runtime_ms;
2624 out_put:
2625 thread__put(thread);
2626 return 0;
2627
2628 out_dump:
2629 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2630 evsel->name,
2631 evsel__strval(evsel, sample, "comm"),
2632 (pid_t)evsel__intval(evsel, sample, "pid"),
2633 runtime,
2634 evsel__intval(evsel, sample, "vruntime"));
2635 goto out_put;
2636 }
2637
2638 static int bpf_output__printer(enum binary_printer_ops op,
2639 unsigned int val, void *extra __maybe_unused, FILE *fp)
2640 {
2641 unsigned char ch = (unsigned char)val;
2642
2643 switch (op) {
2644 case BINARY_PRINT_CHAR_DATA:
2645 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2646 case BINARY_PRINT_DATA_BEGIN:
2647 case BINARY_PRINT_LINE_BEGIN:
2648 case BINARY_PRINT_ADDR:
2649 case BINARY_PRINT_NUM_DATA:
2650 case BINARY_PRINT_NUM_PAD:
2651 case BINARY_PRINT_SEP:
2652 case BINARY_PRINT_CHAR_PAD:
2653 case BINARY_PRINT_LINE_END:
2654 case BINARY_PRINT_DATA_END:
2655 default:
2656 break;
2657 }
2658
2659 return 0;
2660 }
2661
2662 static void bpf_output__fprintf(struct trace *trace,
2663 struct perf_sample *sample)
2664 {
2665 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2666 bpf_output__printer, NULL, trace->output);
2667 ++trace->nr_events_printed;
2668 }
2669
2670 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2671 struct thread *thread, void *augmented_args, int augmented_args_size)
2672 {
2673 char bf[2048];
2674 size_t size = sizeof(bf);
2675 struct tep_format_field *field = evsel->tp_format->format.fields;
2676 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2677 size_t printed = 0;
2678 unsigned long val;
2679 u8 bit = 1;
2680 struct syscall_arg syscall_arg = {
2681 .augmented = {
2682 .size = augmented_args_size,
2683 .args = augmented_args,
2684 },
2685 .idx = 0,
2686 .mask = 0,
2687 .trace = trace,
2688 .thread = thread,
2689 .show_string_prefix = trace->show_string_prefix,
2690 };
2691
2692 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2693 if (syscall_arg.mask & bit)
2694 continue;
2695
2696 syscall_arg.len = 0;
2697 syscall_arg.fmt = arg;
2698 if (field->flags & TEP_FIELD_IS_ARRAY) {
2699 int offset = field->offset;
2700
2701 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2702 offset = format_field__intval(field, sample, evsel->needs_swap);
2703 syscall_arg.len = offset >> 16;
2704 offset &= 0xffff;
2705 }
2706
2707 val = (uintptr_t)(sample->raw_data + offset);
2708 } else
2709 val = format_field__intval(field, sample, evsel->needs_swap);
2710 /*
2711 * Some syscall args need some mask, most don't and
2712 * return val untouched.
2713 */
2714 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2715
2716 /*
2717 * Suppress this argument if its value is zero and
2718 * and we don't have a string associated in an
2719 * strarray for it.
2720 */
2721 if (val == 0 &&
2722 !trace->show_zeros &&
2723 !((arg->show_zero ||
2724 arg->scnprintf == SCA_STRARRAY ||
2725 arg->scnprintf == SCA_STRARRAYS) &&
2726 arg->parm))
2727 continue;
2728
2729 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2730
2731 /*
2732 * XXX Perhaps we should have a show_tp_arg_names,
2733 * leaving show_arg_names just for syscalls?
2734 */
2735 if (1 || trace->show_arg_names)
2736 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2737
2738 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2739 }
2740
2741 return printed + fprintf(trace->output, "%s", bf);
2742 }
2743
2744 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2745 union perf_event *event __maybe_unused,
2746 struct perf_sample *sample)
2747 {
2748 struct thread *thread;
2749 int callchain_ret = 0;
2750 /*
2751 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2752 * this event's max_events having been hit and this is an entry coming
2753 * from the ring buffer that we should discard, since the max events
2754 * have already been considered/printed.
2755 */
2756 if (evsel->disabled)
2757 return 0;
2758
2759 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2760
2761 if (sample->callchain) {
2762 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2763 if (callchain_ret == 0) {
2764 if (callchain_cursor.nr < trace->min_stack)
2765 goto out;
2766 callchain_ret = 1;
2767 }
2768 }
2769
2770 trace__printf_interrupted_entry(trace);
2771 trace__fprintf_tstamp(trace, sample->time, trace->output);
2772
2773 if (trace->trace_syscalls && trace->show_duration)
2774 fprintf(trace->output, "( ): ");
2775
2776 if (thread)
2777 trace__fprintf_comm_tid(trace, thread, trace->output);
2778
2779 if (evsel == trace->syscalls.events.augmented) {
2780 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2781 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2782
2783 if (sc) {
2784 fprintf(trace->output, "%s(", sc->name);
2785 trace__fprintf_sys_enter(trace, evsel, sample);
2786 fputc(')', trace->output);
2787 goto newline;
2788 }
2789
2790 /*
2791 * XXX: Not having the associated syscall info or not finding/adding
2792 * the thread should never happen, but if it does...
2793 * fall thru and print it as a bpf_output event.
2794 */
2795 }
2796
2797 fprintf(trace->output, "%s(", evsel->name);
2798
2799 if (evsel__is_bpf_output(evsel)) {
2800 bpf_output__fprintf(trace, sample);
2801 } else if (evsel->tp_format) {
2802 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2803 trace__fprintf_sys_enter(trace, evsel, sample)) {
2804 if (trace->libtraceevent_print) {
2805 event_format__fprintf(evsel->tp_format, sample->cpu,
2806 sample->raw_data, sample->raw_size,
2807 trace->output);
2808 } else {
2809 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2810 }
2811 }
2812 }
2813
2814 newline:
2815 fprintf(trace->output, ")\n");
2816
2817 if (callchain_ret > 0)
2818 trace__fprintf_callchain(trace, sample);
2819 else if (callchain_ret < 0)
2820 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2821
2822 ++trace->nr_events_printed;
2823
2824 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2825 evsel__disable(evsel);
2826 evsel__close(evsel);
2827 }
2828 out:
2829 thread__put(thread);
2830 return 0;
2831 }
2832
2833 static void print_location(FILE *f, struct perf_sample *sample,
2834 struct addr_location *al,
2835 bool print_dso, bool print_sym)
2836 {
2837
2838 if ((verbose > 0 || print_dso) && al->map)
2839 fprintf(f, "%s@", al->map->dso->long_name);
2840
2841 if ((verbose > 0 || print_sym) && al->sym)
2842 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2843 al->addr - al->sym->start);
2844 else if (al->map)
2845 fprintf(f, "0x%" PRIx64, al->addr);
2846 else
2847 fprintf(f, "0x%" PRIx64, sample->addr);
2848 }
2849
2850 static int trace__pgfault(struct trace *trace,
2851 struct evsel *evsel,
2852 union perf_event *event __maybe_unused,
2853 struct perf_sample *sample)
2854 {
2855 struct thread *thread;
2856 struct addr_location al;
2857 char map_type = 'd';
2858 struct thread_trace *ttrace;
2859 int err = -1;
2860 int callchain_ret = 0;
2861
2862 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2863
2864 if (sample->callchain) {
2865 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2866 if (callchain_ret == 0) {
2867 if (callchain_cursor.nr < trace->min_stack)
2868 goto out_put;
2869 callchain_ret = 1;
2870 }
2871 }
2872
2873 ttrace = thread__trace(thread, trace->output);
2874 if (ttrace == NULL)
2875 goto out_put;
2876
2877 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2878 ttrace->pfmaj++;
2879 else
2880 ttrace->pfmin++;
2881
2882 if (trace->summary_only)
2883 goto out;
2884
2885 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2886
2887 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2888
2889 fprintf(trace->output, "%sfault [",
2890 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2891 "maj" : "min");
2892
2893 print_location(trace->output, sample, &al, false, true);
2894
2895 fprintf(trace->output, "] => ");
2896
2897 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2898
2899 if (!al.map) {
2900 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2901
2902 if (al.map)
2903 map_type = 'x';
2904 else
2905 map_type = '?';
2906 }
2907
2908 print_location(trace->output, sample, &al, true, false);
2909
2910 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2911
2912 if (callchain_ret > 0)
2913 trace__fprintf_callchain(trace, sample);
2914 else if (callchain_ret < 0)
2915 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2916
2917 ++trace->nr_events_printed;
2918 out:
2919 err = 0;
2920 out_put:
2921 thread__put(thread);
2922 return err;
2923 }
2924
2925 static void trace__set_base_time(struct trace *trace,
2926 struct evsel *evsel,
2927 struct perf_sample *sample)
2928 {
2929 /*
2930 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2931 * and don't use sample->time unconditionally, we may end up having
2932 * some other event in the future without PERF_SAMPLE_TIME for good
2933 * reason, i.e. we may not be interested in its timestamps, just in
2934 * it taking place, picking some piece of information when it
2935 * appears in our event stream (vfs_getname comes to mind).
2936 */
2937 if (trace->base_time == 0 && !trace->full_time &&
2938 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2939 trace->base_time = sample->time;
2940 }
2941
2942 static int trace__process_sample(struct perf_tool *tool,
2943 union perf_event *event,
2944 struct perf_sample *sample,
2945 struct evsel *evsel,
2946 struct machine *machine __maybe_unused)
2947 {
2948 struct trace *trace = container_of(tool, struct trace, tool);
2949 struct thread *thread;
2950 int err = 0;
2951
2952 tracepoint_handler handler = evsel->handler;
2953
2954 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2955 if (thread && thread__is_filtered(thread))
2956 goto out;
2957
2958 trace__set_base_time(trace, evsel, sample);
2959
2960 if (handler) {
2961 ++trace->nr_events;
2962 handler(trace, evsel, event, sample);
2963 }
2964 out:
2965 thread__put(thread);
2966 return err;
2967 }
2968
2969 static int trace__record(struct trace *trace, int argc, const char **argv)
2970 {
2971 unsigned int rec_argc, i, j;
2972 const char **rec_argv;
2973 const char * const record_args[] = {
2974 "record",
2975 "-R",
2976 "-m", "1024",
2977 "-c", "1",
2978 };
2979 pid_t pid = getpid();
2980 char *filter = asprintf__tp_filter_pids(1, &pid);
2981 const char * const sc_args[] = { "-e", };
2982 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2983 const char * const majpf_args[] = { "-e", "major-faults" };
2984 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2985 const char * const minpf_args[] = { "-e", "minor-faults" };
2986 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2987 int err = -1;
2988
2989 /* +3 is for the event string below and the pid filter */
2990 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
2991 majpf_args_nr + minpf_args_nr + argc;
2992 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2993
2994 if (rec_argv == NULL || filter == NULL)
2995 goto out_free;
2996
2997 j = 0;
2998 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2999 rec_argv[j++] = record_args[i];
3000
3001 if (trace->trace_syscalls) {
3002 for (i = 0; i < sc_args_nr; i++)
3003 rec_argv[j++] = sc_args[i];
3004
3005 /* event string may be different for older kernels - e.g., RHEL6 */
3006 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3007 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3008 else if (is_valid_tracepoint("syscalls:sys_enter"))
3009 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3010 else {
3011 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3012 goto out_free;
3013 }
3014 }
3015
3016 rec_argv[j++] = "--filter";
3017 rec_argv[j++] = filter;
3018
3019 if (trace->trace_pgfaults & TRACE_PFMAJ)
3020 for (i = 0; i < majpf_args_nr; i++)
3021 rec_argv[j++] = majpf_args[i];
3022
3023 if (trace->trace_pgfaults & TRACE_PFMIN)
3024 for (i = 0; i < minpf_args_nr; i++)
3025 rec_argv[j++] = minpf_args[i];
3026
3027 for (i = 0; i < (unsigned int)argc; i++)
3028 rec_argv[j++] = argv[i];
3029
3030 err = cmd_record(j, rec_argv);
3031 out_free:
3032 free(filter);
3033 free(rec_argv);
3034 return err;
3035 }
3036
3037 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3038
3039 static bool evlist__add_vfs_getname(struct evlist *evlist)
3040 {
3041 bool found = false;
3042 struct evsel *evsel, *tmp;
3043 struct parse_events_error err;
3044 int ret;
3045
3046 bzero(&err, sizeof(err));
3047 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3048 if (ret) {
3049 free(err.str);
3050 free(err.help);
3051 free(err.first_str);
3052 free(err.first_help);
3053 return false;
3054 }
3055
3056 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3057 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3058 continue;
3059
3060 if (evsel__field(evsel, "pathname")) {
3061 evsel->handler = trace__vfs_getname;
3062 found = true;
3063 continue;
3064 }
3065
3066 list_del_init(&evsel->core.node);
3067 evsel->evlist = NULL;
3068 evsel__delete(evsel);
3069 }
3070
3071 return found;
3072 }
3073
3074 static struct evsel *evsel__new_pgfault(u64 config)
3075 {
3076 struct evsel *evsel;
3077 struct perf_event_attr attr = {
3078 .type = PERF_TYPE_SOFTWARE,
3079 .mmap_data = 1,
3080 };
3081
3082 attr.config = config;
3083 attr.sample_period = 1;
3084
3085 event_attr_init(&attr);
3086
3087 evsel = evsel__new(&attr);
3088 if (evsel)
3089 evsel->handler = trace__pgfault;
3090
3091 return evsel;
3092 }
3093
3094 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3095 {
3096 const u32 type = event->header.type;
3097 struct evsel *evsel;
3098
3099 if (type != PERF_RECORD_SAMPLE) {
3100 trace__process_event(trace, trace->host, event, sample);
3101 return;
3102 }
3103
3104 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
3105 if (evsel == NULL) {
3106 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3107 return;
3108 }
3109
3110 if (evswitch__discard(&trace->evswitch, evsel))
3111 return;
3112
3113 trace__set_base_time(trace, evsel, sample);
3114
3115 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3116 sample->raw_data == NULL) {
3117 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3118 evsel__name(evsel), sample->tid,
3119 sample->cpu, sample->raw_size);
3120 } else {
3121 tracepoint_handler handler = evsel->handler;
3122 handler(trace, evsel, event, sample);
3123 }
3124
3125 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3126 interrupted = true;
3127 }
3128
3129 static int trace__add_syscall_newtp(struct trace *trace)
3130 {
3131 int ret = -1;
3132 struct evlist *evlist = trace->evlist;
3133 struct evsel *sys_enter, *sys_exit;
3134
3135 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3136 if (sys_enter == NULL)
3137 goto out;
3138
3139 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3140 goto out_delete_sys_enter;
3141
3142 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3143 if (sys_exit == NULL)
3144 goto out_delete_sys_enter;
3145
3146 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3147 goto out_delete_sys_exit;
3148
3149 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3150 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3151
3152 evlist__add(evlist, sys_enter);
3153 evlist__add(evlist, sys_exit);
3154
3155 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3156 /*
3157 * We're interested only in the user space callchain
3158 * leading to the syscall, allow overriding that for
3159 * debugging reasons using --kernel_syscall_callchains
3160 */
3161 sys_exit->core.attr.exclude_callchain_kernel = 1;
3162 }
3163
3164 trace->syscalls.events.sys_enter = sys_enter;
3165 trace->syscalls.events.sys_exit = sys_exit;
3166
3167 ret = 0;
3168 out:
3169 return ret;
3170
3171 out_delete_sys_exit:
3172 evsel__delete_priv(sys_exit);
3173 out_delete_sys_enter:
3174 evsel__delete_priv(sys_enter);
3175 goto out;
3176 }
3177
3178 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3179 {
3180 int err = -1;
3181 struct evsel *sys_exit;
3182 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3183 trace->ev_qualifier_ids.nr,
3184 trace->ev_qualifier_ids.entries);
3185
3186 if (filter == NULL)
3187 goto out_enomem;
3188
3189 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3190 sys_exit = trace->syscalls.events.sys_exit;
3191 err = evsel__append_tp_filter(sys_exit, filter);
3192 }
3193
3194 free(filter);
3195 out:
3196 return err;
3197 out_enomem:
3198 errno = ENOMEM;
3199 goto out;
3200 }
3201
3202 #ifdef HAVE_LIBBPF_SUPPORT
3203 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3204 {
3205 if (trace->bpf_obj == NULL)
3206 return NULL;
3207
3208 return bpf_object__find_map_by_name(trace->bpf_obj, name);
3209 }
3210
3211 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3212 {
3213 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
3214 }
3215
3216 static void trace__set_bpf_map_syscalls(struct trace *trace)
3217 {
3218 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
3219 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
3220 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
3221 }
3222
3223 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3224 {
3225 if (trace->bpf_obj == NULL)
3226 return NULL;
3227
3228 return bpf_object__find_program_by_title(trace->bpf_obj, name);
3229 }
3230
3231 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3232 const char *prog_name, const char *type)
3233 {
3234 struct bpf_program *prog;
3235
3236 if (prog_name == NULL) {
3237 char default_prog_name[256];
3238 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3239 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3240 if (prog != NULL)
3241 goto out_found;
3242 if (sc->fmt && sc->fmt->alias) {
3243 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3244 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3245 if (prog != NULL)
3246 goto out_found;
3247 }
3248 goto out_unaugmented;
3249 }
3250
3251 prog = trace__find_bpf_program_by_title(trace, prog_name);
3252
3253 if (prog != NULL) {
3254 out_found:
3255 return prog;
3256 }
3257
3258 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3259 prog_name, type, sc->name);
3260 out_unaugmented:
3261 return trace->syscalls.unaugmented_prog;
3262 }
3263
3264 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3265 {
3266 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3267
3268 if (sc == NULL)
3269 return;
3270
3271 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3272 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3273 }
3274
3275 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3276 {
3277 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3278 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3279 }
3280
3281 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3282 {
3283 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3284 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3285 }
3286
3287 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3288 {
3289 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3290 int arg = 0;
3291
3292 if (sc == NULL)
3293 goto out;
3294
3295 for (; arg < sc->nr_args; ++arg) {
3296 entry->string_args_len[arg] = 0;
3297 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3298 /* Should be set like strace -s strsize */
3299 entry->string_args_len[arg] = PATH_MAX;
3300 }
3301 }
3302 out:
3303 for (; arg < 6; ++arg)
3304 entry->string_args_len[arg] = 0;
3305 }
3306 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3307 {
3308 int fd = bpf_map__fd(trace->syscalls.map);
3309 struct bpf_map_syscall_entry value = {
3310 .enabled = !trace->not_ev_qualifier,
3311 };
3312 int err = 0;
3313 size_t i;
3314
3315 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3316 int key = trace->ev_qualifier_ids.entries[i];
3317
3318 if (value.enabled) {
3319 trace__init_bpf_map_syscall_args(trace, key, &value);
3320 trace__init_syscall_bpf_progs(trace, key);
3321 }
3322
3323 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3324 if (err)
3325 break;
3326 }
3327
3328 return err;
3329 }
3330
3331 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3332 {
3333 int fd = bpf_map__fd(trace->syscalls.map);
3334 struct bpf_map_syscall_entry value = {
3335 .enabled = enabled,
3336 };
3337 int err = 0, key;
3338
3339 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3340 if (enabled)
3341 trace__init_bpf_map_syscall_args(trace, key, &value);
3342
3343 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3344 if (err)
3345 break;
3346 }
3347
3348 return err;
3349 }
3350
3351 static int trace__init_syscalls_bpf_map(struct trace *trace)
3352 {
3353 bool enabled = true;
3354
3355 if (trace->ev_qualifier_ids.nr)
3356 enabled = trace->not_ev_qualifier;
3357
3358 return __trace__init_syscalls_bpf_map(trace, enabled);
3359 }
3360
3361 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3362 {
3363 struct tep_format_field *field, *candidate_field;
3364 int id;
3365
3366 /*
3367 * We're only interested in syscalls that have a pointer:
3368 */
3369 for (field = sc->args; field; field = field->next) {
3370 if (field->flags & TEP_FIELD_IS_POINTER)
3371 goto try_to_find_pair;
3372 }
3373
3374 return NULL;
3375
3376 try_to_find_pair:
3377 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3378 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3379 struct bpf_program *pair_prog;
3380 bool is_candidate = false;
3381
3382 if (pair == NULL || pair == sc ||
3383 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3384 continue;
3385
3386 for (field = sc->args, candidate_field = pair->args;
3387 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3388 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3389 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3390
3391 if (is_pointer) {
3392 if (!candidate_is_pointer) {
3393 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3394 continue;
3395 }
3396 } else {
3397 if (candidate_is_pointer) {
3398 // The candidate might copy a pointer we don't have, skip it.
3399 goto next_candidate;
3400 }
3401 continue;
3402 }
3403
3404 if (strcmp(field->type, candidate_field->type))
3405 goto next_candidate;
3406
3407 is_candidate = true;
3408 }
3409
3410 if (!is_candidate)
3411 goto next_candidate;
3412
3413 /*
3414 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3415 * then it may be collecting that and we then can't use it, as it would collect
3416 * more than what is common to the two syscalls.
3417 */
3418 if (candidate_field) {
3419 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3420 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3421 goto next_candidate;
3422 }
3423
3424 pair_prog = pair->bpf_prog.sys_enter;
3425 /*
3426 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3427 * have been searched for, so search it here and if it returns the
3428 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3429 * program for a filtered syscall on a non-filtered one.
3430 *
3431 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3432 * useful for "renameat2".
3433 */
3434 if (pair_prog == NULL) {
3435 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3436 if (pair_prog == trace->syscalls.unaugmented_prog)
3437 goto next_candidate;
3438 }
3439
3440 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3441 return pair_prog;
3442 next_candidate:
3443 continue;
3444 }
3445
3446 return NULL;
3447 }
3448
3449 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3450 {
3451 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3452 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3453 int err = 0, key;
3454
3455 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3456 int prog_fd;
3457
3458 if (!trace__syscall_enabled(trace, key))
3459 continue;
3460
3461 trace__init_syscall_bpf_progs(trace, key);
3462
3463 // It'll get at least the "!raw_syscalls:unaugmented"
3464 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3465 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3466 if (err)
3467 break;
3468 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3469 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3470 if (err)
3471 break;
3472 }
3473
3474 /*
3475 * Now lets do a second pass looking for enabled syscalls without
3476 * an augmenter that have a signature that is a superset of another
3477 * syscall with an augmenter so that we can auto-reuse it.
3478 *
3479 * I.e. if we have an augmenter for the "open" syscall that has
3480 * this signature:
3481 *
3482 * int open(const char *pathname, int flags, mode_t mode);
3483 *
3484 * I.e. that will collect just the first string argument, then we
3485 * can reuse it for the 'creat' syscall, that has this signature:
3486 *
3487 * int creat(const char *pathname, mode_t mode);
3488 *
3489 * and for:
3490 *
3491 * int stat(const char *pathname, struct stat *statbuf);
3492 * int lstat(const char *pathname, struct stat *statbuf);
3493 *
3494 * Because the 'open' augmenter will collect the first arg as a string,
3495 * and leave alone all the other args, which already helps with
3496 * beautifying 'stat' and 'lstat''s pathname arg.
3497 *
3498 * Then, in time, when 'stat' gets an augmenter that collects both
3499 * first and second arg (this one on the raw_syscalls:sys_exit prog
3500 * array tail call, then that one will be used.
3501 */
3502 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3503 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3504 struct bpf_program *pair_prog;
3505 int prog_fd;
3506
3507 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3508 continue;
3509
3510 /*
3511 * For now we're just reusing the sys_enter prog, and if it
3512 * already has an augmenter, we don't need to find one.
3513 */
3514 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3515 continue;
3516
3517 /*
3518 * Look at all the other syscalls for one that has a signature
3519 * that is close enough that we can share:
3520 */
3521 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3522 if (pair_prog == NULL)
3523 continue;
3524
3525 sc->bpf_prog.sys_enter = pair_prog;
3526
3527 /*
3528 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3529 * with the fd for the program we're reusing:
3530 */
3531 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3532 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3533 if (err)
3534 break;
3535 }
3536
3537
3538 return err;
3539 }
3540
3541 static void trace__delete_augmented_syscalls(struct trace *trace)
3542 {
3543 struct evsel *evsel, *tmp;
3544
3545 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3546 evsel__delete(trace->syscalls.events.augmented);
3547 trace->syscalls.events.augmented = NULL;
3548
3549 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3550 if (evsel->bpf_obj == trace->bpf_obj) {
3551 evlist__remove(trace->evlist, evsel);
3552 evsel__delete(evsel);
3553 }
3554
3555 }
3556
3557 bpf_object__close(trace->bpf_obj);
3558 trace->bpf_obj = NULL;
3559 }
3560 #else // HAVE_LIBBPF_SUPPORT
3561 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
3562 const char *name __maybe_unused)
3563 {
3564 return NULL;
3565 }
3566
3567 static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
3568 {
3569 }
3570
3571 static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
3572 {
3573 }
3574
3575 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3576 {
3577 return 0;
3578 }
3579
3580 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3581 {
3582 return 0;
3583 }
3584
3585 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3586 const char *name __maybe_unused)
3587 {
3588 return NULL;
3589 }
3590
3591 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3592 {
3593 return 0;
3594 }
3595
3596 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3597 {
3598 }
3599 #endif // HAVE_LIBBPF_SUPPORT
3600
3601 static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3602 {
3603 struct evsel *evsel;
3604
3605 evlist__for_each_entry(trace->evlist, evsel) {
3606 if (evsel == trace->syscalls.events.augmented ||
3607 evsel->bpf_obj == trace->bpf_obj)
3608 continue;
3609
3610 return false;
3611 }
3612
3613 return true;
3614 }
3615
3616 static int trace__set_ev_qualifier_filter(struct trace *trace)
3617 {
3618 if (trace->syscalls.map)
3619 return trace__set_ev_qualifier_bpf_filter(trace);
3620 if (trace->syscalls.events.sys_enter)
3621 return trace__set_ev_qualifier_tp_filter(trace);
3622 return 0;
3623 }
3624
3625 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3626 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3627 {
3628 int err = 0;
3629 #ifdef HAVE_LIBBPF_SUPPORT
3630 bool value = true;
3631 int map_fd = bpf_map__fd(map);
3632 size_t i;
3633
3634 for (i = 0; i < npids; ++i) {
3635 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3636 if (err)
3637 break;
3638 }
3639 #endif
3640 return err;
3641 }
3642
3643 static int trace__set_filter_loop_pids(struct trace *trace)
3644 {
3645 unsigned int nr = 1, err;
3646 pid_t pids[32] = {
3647 getpid(),
3648 };
3649 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3650
3651 while (thread && nr < ARRAY_SIZE(pids)) {
3652 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3653
3654 if (parent == NULL)
3655 break;
3656
3657 if (!strcmp(thread__comm_str(parent), "sshd") ||
3658 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3659 pids[nr++] = parent->tid;
3660 break;
3661 }
3662 thread = parent;
3663 }
3664
3665 err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3666 if (!err && trace->filter_pids.map)
3667 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3668
3669 return err;
3670 }
3671
3672 static int trace__set_filter_pids(struct trace *trace)
3673 {
3674 int err = 0;
3675 /*
3676 * Better not use !target__has_task() here because we need to cover the
3677 * case where no threads were specified in the command line, but a
3678 * workload was, and in that case we will fill in the thread_map when
3679 * we fork the workload in perf_evlist__prepare_workload.
3680 */
3681 if (trace->filter_pids.nr > 0) {
3682 err = perf_evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3683 trace->filter_pids.entries);
3684 if (!err && trace->filter_pids.map) {
3685 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3686 trace->filter_pids.entries);
3687 }
3688 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3689 err = trace__set_filter_loop_pids(trace);
3690 }
3691
3692 return err;
3693 }
3694
3695 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3696 {
3697 struct evlist *evlist = trace->evlist;
3698 struct perf_sample sample;
3699 int err;
3700
3701 err = perf_evlist__parse_sample(evlist, event, &sample);
3702 if (err)
3703 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3704 else
3705 trace__handle_event(trace, event, &sample);
3706
3707 return 0;
3708 }
3709
3710 static int __trace__flush_events(struct trace *trace)
3711 {
3712 u64 first = ordered_events__first_time(&trace->oe.data);
3713 u64 flush = trace->oe.last - NSEC_PER_SEC;
3714
3715 /* Is there some thing to flush.. */
3716 if (first && first < flush)
3717 return ordered_events__flush_time(&trace->oe.data, flush);
3718
3719 return 0;
3720 }
3721
3722 static int trace__flush_events(struct trace *trace)
3723 {
3724 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3725 }
3726
3727 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3728 {
3729 int err;
3730
3731 if (!trace->sort_events)
3732 return __trace__deliver_event(trace, event);
3733
3734 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3735 if (err && err != -1)
3736 return err;
3737
3738 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3739 if (err)
3740 return err;
3741
3742 return trace__flush_events(trace);
3743 }
3744
3745 static int ordered_events__deliver_event(struct ordered_events *oe,
3746 struct ordered_event *event)
3747 {
3748 struct trace *trace = container_of(oe, struct trace, oe.data);
3749
3750 return __trace__deliver_event(trace, event->event);
3751 }
3752
3753 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3754 {
3755 struct tep_format_field *field;
3756 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3757
3758 if (evsel->tp_format == NULL || fmt == NULL)
3759 return NULL;
3760
3761 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3762 if (strcmp(field->name, arg) == 0)
3763 return fmt;
3764
3765 return NULL;
3766 }
3767
3768 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3769 {
3770 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3771
3772 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3773 char *right = tok + 1, *right_end;
3774
3775 if (*right == '=')
3776 ++right;
3777
3778 while (isspace(*right))
3779 ++right;
3780
3781 if (*right == '\0')
3782 break;
3783
3784 while (!isalpha(*left))
3785 if (++left == tok) {
3786 /*
3787 * Bail out, can't find the name of the argument that is being
3788 * used in the filter, let it try to set this filter, will fail later.
3789 */
3790 return 0;
3791 }
3792
3793 right_end = right + 1;
3794 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3795 ++right_end;
3796
3797 if (isalpha(*right)) {
3798 struct syscall_arg_fmt *fmt;
3799 int left_size = tok - left,
3800 right_size = right_end - right;
3801 char arg[128];
3802
3803 while (isspace(left[left_size - 1]))
3804 --left_size;
3805
3806 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3807
3808 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3809 if (fmt == NULL) {
3810 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3811 arg, evsel->name, evsel->filter);
3812 return -1;
3813 }
3814
3815 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3816 arg, (int)(right - tok), tok, right_size, right);
3817
3818 if (fmt->strtoul) {
3819 u64 val;
3820 struct syscall_arg syscall_arg = {
3821 .parm = fmt->parm,
3822 };
3823
3824 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3825 char *n, expansion[19];
3826 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3827 int expansion_offset = right - new_filter;
3828
3829 pr_debug("%s", expansion);
3830
3831 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3832 pr_debug(" out of memory!\n");
3833 free(new_filter);
3834 return -1;
3835 }
3836 if (new_filter != evsel->filter)
3837 free(new_filter);
3838 left = n + expansion_offset + expansion_lenght;
3839 new_filter = n;
3840 } else {
3841 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3842 right_size, right, arg, evsel->name, evsel->filter);
3843 return -1;
3844 }
3845 } else {
3846 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3847 arg, evsel->name, evsel->filter);
3848 return -1;
3849 }
3850
3851 pr_debug("\n");
3852 } else {
3853 left = right_end;
3854 }
3855 }
3856
3857 if (new_filter != evsel->filter) {
3858 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3859 evsel__set_filter(evsel, new_filter);
3860 free(new_filter);
3861 }
3862
3863 return 0;
3864 }
3865
3866 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3867 {
3868 struct evlist *evlist = trace->evlist;
3869 struct evsel *evsel;
3870
3871 evlist__for_each_entry(evlist, evsel) {
3872 if (evsel->filter == NULL)
3873 continue;
3874
3875 if (trace__expand_filter(trace, evsel)) {
3876 *err_evsel = evsel;
3877 return -1;
3878 }
3879 }
3880
3881 return 0;
3882 }
3883
3884 static int trace__run(struct trace *trace, int argc, const char **argv)
3885 {
3886 struct evlist *evlist = trace->evlist;
3887 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3888 int err = -1, i;
3889 unsigned long before;
3890 const bool forks = argc > 0;
3891 bool draining = false;
3892
3893 trace->live = true;
3894
3895 if (!trace->raw_augmented_syscalls) {
3896 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3897 goto out_error_raw_syscalls;
3898
3899 if (trace->trace_syscalls)
3900 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3901 }
3902
3903 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3904 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3905 if (pgfault_maj == NULL)
3906 goto out_error_mem;
3907 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3908 evlist__add(evlist, pgfault_maj);
3909 }
3910
3911 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3912 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3913 if (pgfault_min == NULL)
3914 goto out_error_mem;
3915 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3916 evlist__add(evlist, pgfault_min);
3917 }
3918
3919 if (trace->sched &&
3920 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3921 goto out_error_sched_stat_runtime;
3922 /*
3923 * If a global cgroup was set, apply it to all the events without an
3924 * explicit cgroup. I.e.:
3925 *
3926 * trace -G A -e sched:*switch
3927 *
3928 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3929 * _and_ sched:sched_switch to the 'A' cgroup, while:
3930 *
3931 * trace -e sched:*switch -G A
3932 *
3933 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3934 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3935 * a cgroup (on the root cgroup, sys wide, etc).
3936 *
3937 * Multiple cgroups:
3938 *
3939 * trace -G A -e sched:*switch -G B
3940 *
3941 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3942 * to the 'B' cgroup.
3943 *
3944 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3945 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3946 */
3947 if (trace->cgroup)
3948 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3949
3950 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3951 if (err < 0) {
3952 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3953 goto out_delete_evlist;
3954 }
3955
3956 err = trace__symbols_init(trace, evlist);
3957 if (err < 0) {
3958 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3959 goto out_delete_evlist;
3960 }
3961
3962 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3963
3964 signal(SIGCHLD, sig_handler);
3965 signal(SIGINT, sig_handler);
3966
3967 if (forks) {
3968 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3969 argv, false, NULL);
3970 if (err < 0) {
3971 fprintf(trace->output, "Couldn't run the workload!\n");
3972 goto out_delete_evlist;
3973 }
3974 }
3975
3976 err = evlist__open(evlist);
3977 if (err < 0)
3978 goto out_error_open;
3979
3980 err = bpf__apply_obj_config();
3981 if (err) {
3982 char errbuf[BUFSIZ];
3983
3984 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3985 pr_err("ERROR: Apply config to BPF failed: %s\n",
3986 errbuf);
3987 goto out_error_open;
3988 }
3989
3990 err = trace__set_filter_pids(trace);
3991 if (err < 0)
3992 goto out_error_mem;
3993
3994 if (trace->syscalls.map)
3995 trace__init_syscalls_bpf_map(trace);
3996
3997 if (trace->syscalls.prog_array.sys_enter)
3998 trace__init_syscalls_bpf_prog_array_maps(trace);
3999
4000 if (trace->ev_qualifier_ids.nr > 0) {
4001 err = trace__set_ev_qualifier_filter(trace);
4002 if (err < 0)
4003 goto out_errno;
4004
4005 if (trace->syscalls.events.sys_exit) {
4006 pr_debug("event qualifier tracepoint filter: %s\n",
4007 trace->syscalls.events.sys_exit->filter);
4008 }
4009 }
4010
4011 /*
4012 * If the "close" syscall is not traced, then we will not have the
4013 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
4014 * fd->pathname table and were ending up showing the last value set by
4015 * syscalls opening a pathname and associating it with a descriptor or
4016 * reading it from /proc/pid/fd/ in cases where that doesn't make
4017 * sense.
4018 *
4019 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
4020 * not in use.
4021 */
4022 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4023
4024 err = trace__expand_filters(trace, &evsel);
4025 if (err)
4026 goto out_delete_evlist;
4027 err = perf_evlist__apply_filters(evlist, &evsel);
4028 if (err < 0)
4029 goto out_error_apply_filters;
4030
4031 if (trace->dump.map)
4032 bpf_map__fprintf(trace->dump.map, trace->output);
4033
4034 err = evlist__mmap(evlist, trace->opts.mmap_pages);
4035 if (err < 0)
4036 goto out_error_mmap;
4037
4038 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
4039 evlist__enable(evlist);
4040
4041 if (forks)
4042 perf_evlist__start_workload(evlist);
4043
4044 if (trace->opts.initial_delay) {
4045 usleep(trace->opts.initial_delay * 1000);
4046 evlist__enable(evlist);
4047 }
4048
4049 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4050 evlist->core.threads->nr > 1 ||
4051 evlist__first(evlist)->core.attr.inherit;
4052
4053 /*
4054 * Now that we already used evsel->core.attr to ask the kernel to setup the
4055 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4056 * trace__resolve_callchain(), allowing per-event max-stack settings
4057 * to override an explicitly set --max-stack global setting.
4058 */
4059 evlist__for_each_entry(evlist, evsel) {
4060 if (evsel__has_callchain(evsel) &&
4061 evsel->core.attr.sample_max_stack == 0)
4062 evsel->core.attr.sample_max_stack = trace->max_stack;
4063 }
4064 again:
4065 before = trace->nr_events;
4066
4067 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4068 union perf_event *event;
4069 struct mmap *md;
4070
4071 md = &evlist->mmap[i];
4072 if (perf_mmap__read_init(&md->core) < 0)
4073 continue;
4074
4075 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4076 ++trace->nr_events;
4077
4078 err = trace__deliver_event(trace, event);
4079 if (err)
4080 goto out_disable;
4081
4082 perf_mmap__consume(&md->core);
4083
4084 if (interrupted)
4085 goto out_disable;
4086
4087 if (done && !draining) {
4088 evlist__disable(evlist);
4089 draining = true;
4090 }
4091 }
4092 perf_mmap__read_done(&md->core);
4093 }
4094
4095 if (trace->nr_events == before) {
4096 int timeout = done ? 100 : -1;
4097
4098 if (!draining && evlist__poll(evlist, timeout) > 0) {
4099 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4100 draining = true;
4101
4102 goto again;
4103 } else {
4104 if (trace__flush_events(trace))
4105 goto out_disable;
4106 }
4107 } else {
4108 goto again;
4109 }
4110
4111 out_disable:
4112 thread__zput(trace->current);
4113
4114 evlist__disable(evlist);
4115
4116 if (trace->sort_events)
4117 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4118
4119 if (!err) {
4120 if (trace->summary)
4121 trace__fprintf_thread_summary(trace, trace->output);
4122
4123 if (trace->show_tool_stats) {
4124 fprintf(trace->output, "Stats:\n "
4125 " vfs_getname : %" PRIu64 "\n"
4126 " proc_getname: %" PRIu64 "\n",
4127 trace->stats.vfs_getname,
4128 trace->stats.proc_getname);
4129 }
4130 }
4131
4132 out_delete_evlist:
4133 trace__symbols__exit(trace);
4134
4135 evlist__delete(evlist);
4136 cgroup__put(trace->cgroup);
4137 trace->evlist = NULL;
4138 trace->live = false;
4139 return err;
4140 {
4141 char errbuf[BUFSIZ];
4142
4143 out_error_sched_stat_runtime:
4144 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4145 goto out_error;
4146
4147 out_error_raw_syscalls:
4148 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4149 goto out_error;
4150
4151 out_error_mmap:
4152 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4153 goto out_error;
4154
4155 out_error_open:
4156 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4157
4158 out_error:
4159 fprintf(trace->output, "%s\n", errbuf);
4160 goto out_delete_evlist;
4161
4162 out_error_apply_filters:
4163 fprintf(trace->output,
4164 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4165 evsel->filter, evsel__name(evsel), errno,
4166 str_error_r(errno, errbuf, sizeof(errbuf)));
4167 goto out_delete_evlist;
4168 }
4169 out_error_mem:
4170 fprintf(trace->output, "Not enough memory to run!\n");
4171 goto out_delete_evlist;
4172
4173 out_errno:
4174 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4175 goto out_delete_evlist;
4176 }
4177
4178 static int trace__replay(struct trace *trace)
4179 {
4180 const struct evsel_str_handler handlers[] = {
4181 { "probe:vfs_getname", trace__vfs_getname, },
4182 };
4183 struct perf_data data = {
4184 .path = input_name,
4185 .mode = PERF_DATA_MODE_READ,
4186 .force = trace->force,
4187 };
4188 struct perf_session *session;
4189 struct evsel *evsel;
4190 int err = -1;
4191
4192 trace->tool.sample = trace__process_sample;
4193 trace->tool.mmap = perf_event__process_mmap;
4194 trace->tool.mmap2 = perf_event__process_mmap2;
4195 trace->tool.comm = perf_event__process_comm;
4196 trace->tool.exit = perf_event__process_exit;
4197 trace->tool.fork = perf_event__process_fork;
4198 trace->tool.attr = perf_event__process_attr;
4199 trace->tool.tracing_data = perf_event__process_tracing_data;
4200 trace->tool.build_id = perf_event__process_build_id;
4201 trace->tool.namespaces = perf_event__process_namespaces;
4202
4203 trace->tool.ordered_events = true;
4204 trace->tool.ordering_requires_timestamps = true;
4205
4206 /* add tid to output */
4207 trace->multiple_threads = true;
4208
4209 session = perf_session__new(&data, false, &trace->tool);
4210 if (IS_ERR(session))
4211 return PTR_ERR(session);
4212
4213 if (trace->opts.target.pid)
4214 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4215
4216 if (trace->opts.target.tid)
4217 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4218
4219 if (symbol__init(&session->header.env) < 0)
4220 goto out;
4221
4222 trace->host = &session->machines.host;
4223
4224 err = perf_session__set_tracepoints_handlers(session, handlers);
4225 if (err)
4226 goto out;
4227
4228 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4229 "raw_syscalls:sys_enter");
4230 /* older kernels have syscalls tp versus raw_syscalls */
4231 if (evsel == NULL)
4232 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4233 "syscalls:sys_enter");
4234
4235 if (evsel &&
4236 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4237 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4238 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4239 goto out;
4240 }
4241
4242 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4243 "raw_syscalls:sys_exit");
4244 if (evsel == NULL)
4245 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4246 "syscalls:sys_exit");
4247 if (evsel &&
4248 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4249 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4250 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4251 goto out;
4252 }
4253
4254 evlist__for_each_entry(session->evlist, evsel) {
4255 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4256 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4257 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4258 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4259 evsel->handler = trace__pgfault;
4260 }
4261
4262 setup_pager();
4263
4264 err = perf_session__process_events(session);
4265 if (err)
4266 pr_err("Failed to process events, error %d", err);
4267
4268 else if (trace->summary)
4269 trace__fprintf_thread_summary(trace, trace->output);
4270
4271 out:
4272 perf_session__delete(session);
4273
4274 return err;
4275 }
4276
4277 static size_t trace__fprintf_threads_header(FILE *fp)
4278 {
4279 size_t printed;
4280
4281 printed = fprintf(fp, "\n Summary of events:\n\n");
4282
4283 return printed;
4284 }
4285
4286 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4287 struct syscall_stats *stats;
4288 double msecs;
4289 int syscall;
4290 )
4291 {
4292 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4293 struct syscall_stats *stats = source->priv;
4294
4295 entry->syscall = source->i;
4296 entry->stats = stats;
4297 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4298 }
4299
4300 static size_t thread__dump_stats(struct thread_trace *ttrace,
4301 struct trace *trace, FILE *fp)
4302 {
4303 size_t printed = 0;
4304 struct syscall *sc;
4305 struct rb_node *nd;
4306 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4307
4308 if (syscall_stats == NULL)
4309 return 0;
4310
4311 printed += fprintf(fp, "\n");
4312
4313 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4314 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4315 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4316
4317 resort_rb__for_each_entry(nd, syscall_stats) {
4318 struct syscall_stats *stats = syscall_stats_entry->stats;
4319 if (stats) {
4320 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4321 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4322 double avg = avg_stats(&stats->stats);
4323 double pct;
4324 u64 n = (u64)stats->stats.n;
4325
4326 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4327 avg /= NSEC_PER_MSEC;
4328
4329 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4330 printed += fprintf(fp, " %-15s", sc->name);
4331 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4332 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4333 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4334
4335 if (trace->errno_summary && stats->nr_failures) {
4336 const char *arch_name = perf_env__arch(trace->host->env);
4337 int e;
4338
4339 for (e = 0; e < stats->max_errno; ++e) {
4340 if (stats->errnos[e] != 0)
4341 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4342 }
4343 }
4344 }
4345 }
4346
4347 resort_rb__delete(syscall_stats);
4348 printed += fprintf(fp, "\n\n");
4349
4350 return printed;
4351 }
4352
4353 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4354 {
4355 size_t printed = 0;
4356 struct thread_trace *ttrace = thread__priv(thread);
4357 double ratio;
4358
4359 if (ttrace == NULL)
4360 return 0;
4361
4362 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4363
4364 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4365 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4366 printed += fprintf(fp, "%.1f%%", ratio);
4367 if (ttrace->pfmaj)
4368 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4369 if (ttrace->pfmin)
4370 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4371 if (trace->sched)
4372 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4373 else if (fputc('\n', fp) != EOF)
4374 ++printed;
4375
4376 printed += thread__dump_stats(ttrace, trace, fp);
4377
4378 return printed;
4379 }
4380
4381 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4382 {
4383 return ttrace ? ttrace->nr_events : 0;
4384 }
4385
4386 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4387 struct thread *thread;
4388 )
4389 {
4390 entry->thread = rb_entry(nd, struct thread, rb_node);
4391 }
4392
4393 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4394 {
4395 size_t printed = trace__fprintf_threads_header(fp);
4396 struct rb_node *nd;
4397 int i;
4398
4399 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4400 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4401
4402 if (threads == NULL) {
4403 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4404 return 0;
4405 }
4406
4407 resort_rb__for_each_entry(nd, threads)
4408 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4409
4410 resort_rb__delete(threads);
4411 }
4412 return printed;
4413 }
4414
4415 static int trace__set_duration(const struct option *opt, const char *str,
4416 int unset __maybe_unused)
4417 {
4418 struct trace *trace = opt->value;
4419
4420 trace->duration_filter = atof(str);
4421 return 0;
4422 }
4423
4424 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4425 int unset __maybe_unused)
4426 {
4427 int ret = -1;
4428 size_t i;
4429 struct trace *trace = opt->value;
4430 /*
4431 * FIXME: introduce a intarray class, plain parse csv and create a
4432 * { int nr, int entries[] } struct...
4433 */
4434 struct intlist *list = intlist__new(str);
4435
4436 if (list == NULL)
4437 return -1;
4438
4439 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4440 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4441
4442 if (trace->filter_pids.entries == NULL)
4443 goto out;
4444
4445 trace->filter_pids.entries[0] = getpid();
4446
4447 for (i = 1; i < trace->filter_pids.nr; ++i)
4448 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4449
4450 intlist__delete(list);
4451 ret = 0;
4452 out:
4453 return ret;
4454 }
4455
4456 static int trace__open_output(struct trace *trace, const char *filename)
4457 {
4458 struct stat st;
4459
4460 if (!stat(filename, &st) && st.st_size) {
4461 char oldname[PATH_MAX];
4462
4463 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4464 unlink(oldname);
4465 rename(filename, oldname);
4466 }
4467
4468 trace->output = fopen(filename, "w");
4469
4470 return trace->output == NULL ? -errno : 0;
4471 }
4472
4473 static int parse_pagefaults(const struct option *opt, const char *str,
4474 int unset __maybe_unused)
4475 {
4476 int *trace_pgfaults = opt->value;
4477
4478 if (strcmp(str, "all") == 0)
4479 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4480 else if (strcmp(str, "maj") == 0)
4481 *trace_pgfaults |= TRACE_PFMAJ;
4482 else if (strcmp(str, "min") == 0)
4483 *trace_pgfaults |= TRACE_PFMIN;
4484 else
4485 return -1;
4486
4487 return 0;
4488 }
4489
4490 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4491 {
4492 struct evsel *evsel;
4493
4494 evlist__for_each_entry(evlist, evsel) {
4495 if (evsel->handler == NULL)
4496 evsel->handler = handler;
4497 }
4498 }
4499
4500 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4501 {
4502 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4503
4504 if (fmt) {
4505 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4506
4507 if (scfmt) {
4508 int skip = 0;
4509
4510 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4511 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4512 ++skip;
4513
4514 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4515 }
4516 }
4517 }
4518
4519 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4520 {
4521 struct evsel *evsel;
4522
4523 evlist__for_each_entry(evlist, evsel) {
4524 if (evsel->priv || !evsel->tp_format)
4525 continue;
4526
4527 if (strcmp(evsel->tp_format->system, "syscalls")) {
4528 evsel__init_tp_arg_scnprintf(evsel);
4529 continue;
4530 }
4531
4532 if (evsel__init_syscall_tp(evsel))
4533 return -1;
4534
4535 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4536 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4537
4538 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4539 return -1;
4540
4541 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4542 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4543 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4544
4545 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4546 return -1;
4547
4548 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4549 }
4550 }
4551
4552 return 0;
4553 }
4554
4555 /*
4556 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4557 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4558 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4559 *
4560 * It'd be better to introduce a parse_options() variant that would return a
4561 * list with the terms it didn't match to an event...
4562 */
4563 static int trace__parse_events_option(const struct option *opt, const char *str,
4564 int unset __maybe_unused)
4565 {
4566 struct trace *trace = (struct trace *)opt->value;
4567 const char *s = str;
4568 char *sep = NULL, *lists[2] = { NULL, NULL, };
4569 int len = strlen(str) + 1, err = -1, list, idx;
4570 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4571 char group_name[PATH_MAX];
4572 struct syscall_fmt *fmt;
4573
4574 if (strace_groups_dir == NULL)
4575 return -1;
4576
4577 if (*s == '!') {
4578 ++s;
4579 trace->not_ev_qualifier = true;
4580 }
4581
4582 while (1) {
4583 if ((sep = strchr(s, ',')) != NULL)
4584 *sep = '\0';
4585
4586 list = 0;
4587 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4588 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4589 list = 1;
4590 goto do_concat;
4591 }
4592
4593 fmt = syscall_fmt__find_by_alias(s);
4594 if (fmt != NULL) {
4595 list = 1;
4596 s = fmt->name;
4597 } else {
4598 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4599 if (access(group_name, R_OK) == 0)
4600 list = 1;
4601 }
4602 do_concat:
4603 if (lists[list]) {
4604 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4605 } else {
4606 lists[list] = malloc(len);
4607 if (lists[list] == NULL)
4608 goto out;
4609 strcpy(lists[list], s);
4610 }
4611
4612 if (!sep)
4613 break;
4614
4615 *sep = ',';
4616 s = sep + 1;
4617 }
4618
4619 if (lists[1] != NULL) {
4620 struct strlist_config slist_config = {
4621 .dirname = strace_groups_dir,
4622 };
4623
4624 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4625 if (trace->ev_qualifier == NULL) {
4626 fputs("Not enough memory to parse event qualifier", trace->output);
4627 goto out;
4628 }
4629
4630 if (trace__validate_ev_qualifier(trace))
4631 goto out;
4632 trace->trace_syscalls = true;
4633 }
4634
4635 err = 0;
4636
4637 if (lists[0]) {
4638 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4639 "event selector. use 'perf list' to list available events",
4640 parse_events_option);
4641 err = parse_events_option(&o, lists[0], 0);
4642 }
4643 out:
4644 if (sep)
4645 *sep = ',';
4646
4647 return err;
4648 }
4649
4650 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4651 {
4652 struct trace *trace = opt->value;
4653
4654 if (!list_empty(&trace->evlist->core.entries))
4655 return parse_cgroups(opt, str, unset);
4656
4657 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4658
4659 return 0;
4660 }
4661
4662 static int trace__config(const char *var, const char *value, void *arg)
4663 {
4664 struct trace *trace = arg;
4665 int err = 0;
4666
4667 if (!strcmp(var, "trace.add_events")) {
4668 trace->perfconfig_events = strdup(value);
4669 if (trace->perfconfig_events == NULL) {
4670 pr_err("Not enough memory for %s\n", "trace.add_events");
4671 return -1;
4672 }
4673 } else if (!strcmp(var, "trace.show_timestamp")) {
4674 trace->show_tstamp = perf_config_bool(var, value);
4675 } else if (!strcmp(var, "trace.show_duration")) {
4676 trace->show_duration = perf_config_bool(var, value);
4677 } else if (!strcmp(var, "trace.show_arg_names")) {
4678 trace->show_arg_names = perf_config_bool(var, value);
4679 if (!trace->show_arg_names)
4680 trace->show_zeros = true;
4681 } else if (!strcmp(var, "trace.show_zeros")) {
4682 bool new_show_zeros = perf_config_bool(var, value);
4683 if (!trace->show_arg_names && !new_show_zeros) {
4684 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4685 goto out;
4686 }
4687 trace->show_zeros = new_show_zeros;
4688 } else if (!strcmp(var, "trace.show_prefix")) {
4689 trace->show_string_prefix = perf_config_bool(var, value);
4690 } else if (!strcmp(var, "trace.no_inherit")) {
4691 trace->opts.no_inherit = perf_config_bool(var, value);
4692 } else if (!strcmp(var, "trace.args_alignment")) {
4693 int args_alignment = 0;
4694 if (perf_config_int(&args_alignment, var, value) == 0)
4695 trace->args_alignment = args_alignment;
4696 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4697 if (strcasecmp(value, "libtraceevent") == 0)
4698 trace->libtraceevent_print = true;
4699 else if (strcasecmp(value, "libbeauty") == 0)
4700 trace->libtraceevent_print = false;
4701 }
4702 out:
4703 return err;
4704 }
4705
4706 int cmd_trace(int argc, const char **argv)
4707 {
4708 const char *trace_usage[] = {
4709 "perf trace [<options>] [<command>]",
4710 "perf trace [<options>] -- <command> [<options>]",
4711 "perf trace record [<options>] [<command>]",
4712 "perf trace record [<options>] -- <command> [<options>]",
4713 NULL
4714 };
4715 struct trace trace = {
4716 .opts = {
4717 .target = {
4718 .uid = UINT_MAX,
4719 .uses_mmap = true,
4720 },
4721 .user_freq = UINT_MAX,
4722 .user_interval = ULLONG_MAX,
4723 .no_buffering = true,
4724 .mmap_pages = UINT_MAX,
4725 },
4726 .output = stderr,
4727 .show_comm = true,
4728 .show_tstamp = true,
4729 .show_duration = true,
4730 .show_arg_names = true,
4731 .args_alignment = 70,
4732 .trace_syscalls = false,
4733 .kernel_syscallchains = false,
4734 .max_stack = UINT_MAX,
4735 .max_events = ULONG_MAX,
4736 };
4737 const char *map_dump_str = NULL;
4738 const char *output_name = NULL;
4739 const struct option trace_options[] = {
4740 OPT_CALLBACK('e', "event", &trace, "event",
4741 "event/syscall selector. use 'perf list' to list available events",
4742 trace__parse_events_option),
4743 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4744 "event filter", parse_filter),
4745 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4746 "show the thread COMM next to its id"),
4747 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4748 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4749 trace__parse_events_option),
4750 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4751 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4752 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4753 "trace events on existing process id"),
4754 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4755 "trace events on existing thread id"),
4756 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4757 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4758 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4759 "system-wide collection from all CPUs"),
4760 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4761 "list of cpus to monitor"),
4762 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4763 "child tasks do not inherit counters"),
4764 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4765 "number of mmap data pages",
4766 perf_evlist__parse_mmap_pages),
4767 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4768 "user to profile"),
4769 OPT_CALLBACK(0, "duration", &trace, "float",
4770 "show only events with duration > N.M ms",
4771 trace__set_duration),
4772 #ifdef HAVE_LIBBPF_SUPPORT
4773 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4774 #endif
4775 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4776 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4777 OPT_BOOLEAN('T', "time", &trace.full_time,
4778 "Show full timestamp, not time relative to first start"),
4779 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4780 "Show only syscalls that failed"),
4781 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4782 "Show only syscall summary with statistics"),
4783 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4784 "Show all syscalls and summary with statistics"),
4785 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4786 "Show errno stats per syscall, use with -s or -S"),
4787 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4788 "Trace pagefaults", parse_pagefaults, "maj"),
4789 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4790 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4791 OPT_CALLBACK(0, "call-graph", &trace.opts,
4792 "record_mode[,record_size]", record_callchain_help,
4793 &record_parse_callchain_opt),
4794 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4795 "Use libtraceevent to print the tracepoint arguments."),
4796 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4797 "Show the kernel callchains on the syscall exit path"),
4798 OPT_ULONG(0, "max-events", &trace.max_events,
4799 "Set the maximum number of events to print, exit after that is reached. "),
4800 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4801 "Set the minimum stack depth when parsing the callchain, "
4802 "anything below the specified depth will be ignored."),
4803 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4804 "Set the maximum stack depth when parsing the callchain, "
4805 "anything beyond the specified depth will be ignored. "
4806 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4807 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4808 "Sort batch of events before processing, use if getting out of order events"),
4809 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4810 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4811 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4812 "per thread proc mmap processing timeout in ms"),
4813 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4814 trace__parse_cgroups),
4815 OPT_INTEGER('D', "delay", &trace.opts.initial_delay,
4816 "ms to wait before starting measurement after program "
4817 "start"),
4818 OPTS_EVSWITCH(&trace.evswitch),
4819 OPT_END()
4820 };
4821 bool __maybe_unused max_stack_user_set = true;
4822 bool mmap_pages_user_set = true;
4823 struct evsel *evsel;
4824 const char * const trace_subcommands[] = { "record", NULL };
4825 int err = -1;
4826 char bf[BUFSIZ];
4827
4828 signal(SIGSEGV, sighandler_dump_stack);
4829 signal(SIGFPE, sighandler_dump_stack);
4830
4831 trace.evlist = evlist__new();
4832 trace.sctbl = syscalltbl__new();
4833
4834 if (trace.evlist == NULL || trace.sctbl == NULL) {
4835 pr_err("Not enough memory to run!\n");
4836 err = -ENOMEM;
4837 goto out;
4838 }
4839
4840 /*
4841 * Parsing .perfconfig may entail creating a BPF event, that may need
4842 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4843 * is too small. This affects just this process, not touching the
4844 * global setting. If it fails we'll get something in 'perf trace -v'
4845 * to help diagnose the problem.
4846 */
4847 rlimit__bump_memlock();
4848
4849 err = perf_config(trace__config, &trace);
4850 if (err)
4851 goto out;
4852
4853 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4854 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4855
4856 /*
4857 * Here we already passed thru trace__parse_events_option() and it has
4858 * already figured out if -e syscall_name, if not but if --event
4859 * foo:bar was used, the user is interested _just_ in those, say,
4860 * tracepoint events, not in the strace-like syscall-name-based mode.
4861 *
4862 * This is important because we need to check if strace-like mode is
4863 * needed to decided if we should filter out the eBPF
4864 * __augmented_syscalls__ code, if it is in the mix, say, via
4865 * .perfconfig trace.add_events, and filter those out.
4866 */
4867 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4868 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4869 trace.trace_syscalls = true;
4870 }
4871 /*
4872 * Now that we have --verbose figured out, lets see if we need to parse
4873 * events from .perfconfig, so that if those events fail parsing, say some
4874 * BPF program fails, then we'll be able to use --verbose to see what went
4875 * wrong in more detail.
4876 */
4877 if (trace.perfconfig_events != NULL) {
4878 struct parse_events_error parse_err;
4879
4880 bzero(&parse_err, sizeof(parse_err));
4881 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4882 if (err) {
4883 parse_events_print_error(&parse_err, trace.perfconfig_events);
4884 goto out;
4885 }
4886 }
4887
4888 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4889 usage_with_options_msg(trace_usage, trace_options,
4890 "cgroup monitoring only available in system-wide mode");
4891 }
4892
4893 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4894 if (IS_ERR(evsel)) {
4895 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4896 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4897 goto out;
4898 }
4899
4900 if (evsel) {
4901 trace.syscalls.events.augmented = evsel;
4902
4903 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4904 if (evsel == NULL) {
4905 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4906 goto out;
4907 }
4908
4909 if (evsel->bpf_obj == NULL) {
4910 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4911 goto out;
4912 }
4913
4914 trace.bpf_obj = evsel->bpf_obj;
4915
4916 /*
4917 * If we have _just_ the augmenter event but don't have a
4918 * explicit --syscalls, then assume we want all strace-like
4919 * syscalls:
4920 */
4921 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4922 trace.trace_syscalls = true;
4923 /*
4924 * So, if we have a syscall augmenter, but trace_syscalls, aka
4925 * strace-like syscall tracing is not set, then we need to trow
4926 * away the augmenter, i.e. all the events that were created
4927 * from that BPF object file.
4928 *
4929 * This is more to fix the current .perfconfig trace.add_events
4930 * style of setting up the strace-like eBPF based syscall point
4931 * payload augmenter.
4932 *
4933 * All this complexity will be avoided by adding an alternative
4934 * to trace.add_events in the form of
4935 * trace.bpf_augmented_syscalls, that will be only parsed if we
4936 * need it.
4937 *
4938 * .perfconfig trace.add_events is still useful if we want, for
4939 * instance, have msr_write.msr in some .perfconfig profile based
4940 * 'perf trace --config determinism.profile' mode, where for some
4941 * particular goal/workload type we want a set of events and
4942 * output mode (with timings, etc) instead of having to add
4943 * all via the command line.
4944 *
4945 * Also --config to specify an alternate .perfconfig file needs
4946 * to be implemented.
4947 */
4948 if (!trace.trace_syscalls) {
4949 trace__delete_augmented_syscalls(&trace);
4950 } else {
4951 trace__set_bpf_map_filtered_pids(&trace);
4952 trace__set_bpf_map_syscalls(&trace);
4953 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4954 }
4955 }
4956
4957 err = bpf__setup_stdout(trace.evlist);
4958 if (err) {
4959 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4960 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4961 goto out;
4962 }
4963
4964 err = -1;
4965
4966 if (map_dump_str) {
4967 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4968 if (trace.dump.map == NULL) {
4969 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4970 goto out;
4971 }
4972 }
4973
4974 if (trace.trace_pgfaults) {
4975 trace.opts.sample_address = true;
4976 trace.opts.sample_time = true;
4977 }
4978
4979 if (trace.opts.mmap_pages == UINT_MAX)
4980 mmap_pages_user_set = false;
4981
4982 if (trace.max_stack == UINT_MAX) {
4983 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4984 max_stack_user_set = false;
4985 }
4986
4987 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4988 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4989 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4990 }
4991 #endif
4992
4993 if (callchain_param.enabled) {
4994 if (!mmap_pages_user_set && geteuid() == 0)
4995 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4996
4997 symbol_conf.use_callchain = true;
4998 }
4999
5000 if (trace.evlist->core.nr_entries > 0) {
5001 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
5002 if (evlist__set_syscall_tp_fields(trace.evlist)) {
5003 perror("failed to set syscalls:* tracepoint fields");
5004 goto out;
5005 }
5006 }
5007
5008 if (trace.sort_events) {
5009 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
5010 ordered_events__set_copy_on_queue(&trace.oe.data, true);
5011 }
5012
5013 /*
5014 * If we are augmenting syscalls, then combine what we put in the
5015 * __augmented_syscalls__ BPF map with what is in the
5016 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
5017 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
5018 *
5019 * We'll switch to look at two BPF maps, one for sys_enter and the
5020 * other for sys_exit when we start augmenting the sys_exit paths with
5021 * buffers that are being copied from kernel to userspace, think 'read'
5022 * syscall.
5023 */
5024 if (trace.syscalls.events.augmented) {
5025 evlist__for_each_entry(trace.evlist, evsel) {
5026 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
5027
5028 if (raw_syscalls_sys_exit) {
5029 trace.raw_augmented_syscalls = true;
5030 goto init_augmented_syscall_tp;
5031 }
5032
5033 if (trace.syscalls.events.augmented->priv == NULL &&
5034 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5035 struct evsel *augmented = trace.syscalls.events.augmented;
5036 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5037 evsel__init_augmented_syscall_tp_args(augmented))
5038 goto out;
5039 /*
5040 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5041 * Above we made sure we can get from the payload the tp fields
5042 * that we get from syscalls:sys_enter tracefs format file.
5043 */
5044 augmented->handler = trace__sys_enter;
5045 /*
5046 * Now we do the same for the *syscalls:sys_enter event so that
5047 * if we handle it directly, i.e. if the BPF prog returns 0 so
5048 * as not to filter it, then we'll handle it just like we would
5049 * for the BPF_OUTPUT one:
5050 */
5051 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5052 evsel__init_augmented_syscall_tp_args(evsel))
5053 goto out;
5054 evsel->handler = trace__sys_enter;
5055 }
5056
5057 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5058 struct syscall_tp *sc;
5059 init_augmented_syscall_tp:
5060 if (evsel__init_augmented_syscall_tp(evsel, evsel))
5061 goto out;
5062 sc = __evsel__syscall_tp(evsel);
5063 /*
5064 * For now with BPF raw_augmented we hook into
5065 * raw_syscalls:sys_enter and there we get all
5066 * 6 syscall args plus the tracepoint common
5067 * fields and the syscall_nr (another long).
5068 * So we check if that is the case and if so
5069 * don't look after the sc->args_size but
5070 * always after the full raw_syscalls:sys_enter
5071 * payload, which is fixed.
5072 *
5073 * We'll revisit this later to pass
5074 * s->args_size to the BPF augmenter (now
5075 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5076 * so that it copies only what we need for each
5077 * syscall, like what happens when we use
5078 * syscalls:sys_enter_NAME, so that we reduce
5079 * the kernel/userspace traffic to just what is
5080 * needed for each syscall.
5081 */
5082 if (trace.raw_augmented_syscalls)
5083 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5084 evsel__init_augmented_syscall_tp_ret(evsel);
5085 evsel->handler = trace__sys_exit;
5086 }
5087 }
5088 }
5089
5090 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5091 return trace__record(&trace, argc-1, &argv[1]);
5092
5093 /* Using just --errno-summary will trigger --summary */
5094 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5095 trace.summary_only = true;
5096
5097 /* summary_only implies summary option, but don't overwrite summary if set */
5098 if (trace.summary_only)
5099 trace.summary = trace.summary_only;
5100
5101 if (output_name != NULL) {
5102 err = trace__open_output(&trace, output_name);
5103 if (err < 0) {
5104 perror("failed to create output file");
5105 goto out;
5106 }
5107 }
5108
5109 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5110 if (err)
5111 goto out_close;
5112
5113 err = target__validate(&trace.opts.target);
5114 if (err) {
5115 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5116 fprintf(trace.output, "%s", bf);
5117 goto out_close;
5118 }
5119
5120 err = target__parse_uid(&trace.opts.target);
5121 if (err) {
5122 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5123 fprintf(trace.output, "%s", bf);
5124 goto out_close;
5125 }
5126
5127 if (!argc && target__none(&trace.opts.target))
5128 trace.opts.target.system_wide = true;
5129
5130 if (input_name)
5131 err = trace__replay(&trace);
5132 else
5133 err = trace__run(&trace, argc, argv);
5134
5135 out_close:
5136 if (output_name != NULL)
5137 fclose(trace.output);
5138 out:
5139 zfree(&trace.perfconfig_events);
5140 return err;
5141 }
Linux with added FPC-III support