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Merge tag 'ntb-5.11' of git://github.com/jonmason/ntb
[linux/fpc-iii.git] / tools / perf / builtin-trace.c
blob85b6a46e85b686b99b2e7b99ba5e7a4de71b13d3
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 // Need to memset from offset 0 and +1 members if brand new
1766 if (trace->syscalls.table == NULL)
1767 memset(table, 0, (id + 1) * sizeof(*sc));
1768 else
1769 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1770
1771 trace->syscalls.table = table;
1772 trace->sctbl->syscalls.max_id = id;
1773 }
1774 #endif
1775 sc = trace->syscalls.table + id;
1776 if (sc->nonexistent)
1777 return 0;
1778
1779 if (name == NULL) {
1780 sc->nonexistent = true;
1781 return 0;
1782 }
1783
1784 sc->name = name;
1785 sc->fmt = syscall_fmt__find(sc->name);
1786
1787 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1788 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1789
1790 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1791 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1792 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1793 }
1794
1795 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1796 return -ENOMEM;
1797
1798 if (IS_ERR(sc->tp_format))
1799 return PTR_ERR(sc->tp_format);
1800
1801 sc->args = sc->tp_format->format.fields;
1802 /*
1803 * We need to check and discard the first variable '__syscall_nr'
1804 * or 'nr' that mean the syscall number. It is needless here.
1805 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1806 */
1807 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1808 sc->args = sc->args->next;
1809 --sc->nr_args;
1810 }
1811
1812 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1813 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1814
1815 return syscall__set_arg_fmts(sc);
1816 }
1817
1818 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1819 {
1820 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1821
1822 if (fmt != NULL) {
1823 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1824 return 0;
1825 }
1826
1827 return -ENOMEM;
1828 }
1829
1830 static int intcmp(const void *a, const void *b)
1831 {
1832 const int *one = a, *another = b;
1833
1834 return *one - *another;
1835 }
1836
1837 static int trace__validate_ev_qualifier(struct trace *trace)
1838 {
1839 int err = 0;
1840 bool printed_invalid_prefix = false;
1841 struct str_node *pos;
1842 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1843
1844 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1845 sizeof(trace->ev_qualifier_ids.entries[0]));
1846
1847 if (trace->ev_qualifier_ids.entries == NULL) {
1848 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1849 trace->output);
1850 err = -EINVAL;
1851 goto out;
1852 }
1853
1854 strlist__for_each_entry(pos, trace->ev_qualifier) {
1855 const char *sc = pos->s;
1856 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1857
1858 if (id < 0) {
1859 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1860 if (id >= 0)
1861 goto matches;
1862
1863 if (!printed_invalid_prefix) {
1864 pr_debug("Skipping unknown syscalls: ");
1865 printed_invalid_prefix = true;
1866 } else {
1867 pr_debug(", ");
1868 }
1869
1870 pr_debug("%s", sc);
1871 continue;
1872 }
1873 matches:
1874 trace->ev_qualifier_ids.entries[nr_used++] = id;
1875 if (match_next == -1)
1876 continue;
1877
1878 while (1) {
1879 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1880 if (id < 0)
1881 break;
1882 if (nr_allocated == nr_used) {
1883 void *entries;
1884
1885 nr_allocated += 8;
1886 entries = realloc(trace->ev_qualifier_ids.entries,
1887 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1888 if (entries == NULL) {
1889 err = -ENOMEM;
1890 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1891 goto out_free;
1892 }
1893 trace->ev_qualifier_ids.entries = entries;
1894 }
1895 trace->ev_qualifier_ids.entries[nr_used++] = id;
1896 }
1897 }
1898
1899 trace->ev_qualifier_ids.nr = nr_used;
1900 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1901 out:
1902 if (printed_invalid_prefix)
1903 pr_debug("\n");
1904 return err;
1905 out_free:
1906 zfree(&trace->ev_qualifier_ids.entries);
1907 trace->ev_qualifier_ids.nr = 0;
1908 goto out;
1909 }
1910
1911 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1912 {
1913 bool in_ev_qualifier;
1914
1915 if (trace->ev_qualifier_ids.nr == 0)
1916 return true;
1917
1918 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1919 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1920
1921 if (in_ev_qualifier)
1922 return !trace->not_ev_qualifier;
1923
1924 return trace->not_ev_qualifier;
1925 }
1926
1927 /*
1928 * args is to be interpreted as a series of longs but we need to handle
1929 * 8-byte unaligned accesses. args points to raw_data within the event
1930 * and raw_data is guaranteed to be 8-byte unaligned because it is
1931 * preceded by raw_size which is a u32. So we need to copy args to a temp
1932 * variable to read it. Most notably this avoids extended load instructions
1933 * on unaligned addresses
1934 */
1935 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1936 {
1937 unsigned long val;
1938 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1939
1940 memcpy(&val, p, sizeof(val));
1941 return val;
1942 }
1943
1944 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1945 struct syscall_arg *arg)
1946 {
1947 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1948 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1949
1950 return scnprintf(bf, size, "arg%d: ", arg->idx);
1951 }
1952
1953 /*
1954 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1955 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1956 * in tools/perf/trace/beauty/mount_flags.c
1957 */
1958 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1959 {
1960 if (fmt && fmt->mask_val)
1961 return fmt->mask_val(arg, val);
1962
1963 return val;
1964 }
1965
1966 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1967 struct syscall_arg *arg, unsigned long val)
1968 {
1969 if (fmt && fmt->scnprintf) {
1970 arg->val = val;
1971 if (fmt->parm)
1972 arg->parm = fmt->parm;
1973 return fmt->scnprintf(bf, size, arg);
1974 }
1975 return scnprintf(bf, size, "%ld", val);
1976 }
1977
1978 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1979 unsigned char *args, void *augmented_args, int augmented_args_size,
1980 struct trace *trace, struct thread *thread)
1981 {
1982 size_t printed = 0;
1983 unsigned long val;
1984 u8 bit = 1;
1985 struct syscall_arg arg = {
1986 .args = args,
1987 .augmented = {
1988 .size = augmented_args_size,
1989 .args = augmented_args,
1990 },
1991 .idx = 0,
1992 .mask = 0,
1993 .trace = trace,
1994 .thread = thread,
1995 .show_string_prefix = trace->show_string_prefix,
1996 };
1997 struct thread_trace *ttrace = thread__priv(thread);
1998
1999 /*
2000 * Things like fcntl will set this in its 'cmd' formatter to pick the
2001 * right formatter for the return value (an fd? file flags?), which is
2002 * not needed for syscalls that always return a given type, say an fd.
2003 */
2004 ttrace->ret_scnprintf = NULL;
2005
2006 if (sc->args != NULL) {
2007 struct tep_format_field *field;
2008
2009 for (field = sc->args; field;
2010 field = field->next, ++arg.idx, bit <<= 1) {
2011 if (arg.mask & bit)
2012 continue;
2013
2014 arg.fmt = &sc->arg_fmt[arg.idx];
2015 val = syscall_arg__val(&arg, arg.idx);
2016 /*
2017 * Some syscall args need some mask, most don't and
2018 * return val untouched.
2019 */
2020 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2021
2022 /*
2023 * Suppress this argument if its value is zero and
2024 * and we don't have a string associated in an
2025 * strarray for it.
2026 */
2027 if (val == 0 &&
2028 !trace->show_zeros &&
2029 !(sc->arg_fmt &&
2030 (sc->arg_fmt[arg.idx].show_zero ||
2031 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2032 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2033 sc->arg_fmt[arg.idx].parm))
2034 continue;
2035
2036 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2037
2038 if (trace->show_arg_names)
2039 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2040
2041 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2042 bf + printed, size - printed, &arg, val);
2043 }
2044 } else if (IS_ERR(sc->tp_format)) {
2045 /*
2046 * If we managed to read the tracepoint /format file, then we
2047 * may end up not having any args, like with gettid(), so only
2048 * print the raw args when we didn't manage to read it.
2049 */
2050 while (arg.idx < sc->nr_args) {
2051 if (arg.mask & bit)
2052 goto next_arg;
2053 val = syscall_arg__val(&arg, arg.idx);
2054 if (printed)
2055 printed += scnprintf(bf + printed, size - printed, ", ");
2056 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2057 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2058 next_arg:
2059 ++arg.idx;
2060 bit <<= 1;
2061 }
2062 }
2063
2064 return printed;
2065 }
2066
2067 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2068 union perf_event *event,
2069 struct perf_sample *sample);
2070
2071 static struct syscall *trace__syscall_info(struct trace *trace,
2072 struct evsel *evsel, int id)
2073 {
2074 int err = 0;
2075
2076 if (id < 0) {
2077
2078 /*
2079 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2080 * before that, leaving at a higher verbosity level till that is
2081 * explained. Reproduced with plain ftrace with:
2082 *
2083 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2084 * grep "NR -1 " /t/trace_pipe
2085 *
2086 * After generating some load on the machine.
2087 */
2088 if (verbose > 1) {
2089 static u64 n;
2090 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2091 id, evsel__name(evsel), ++n);
2092 }
2093 return NULL;
2094 }
2095
2096 err = -EINVAL;
2097
2098 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
2099 if (id > trace->sctbl->syscalls.max_id) {
2100 #else
2101 if (id >= trace->sctbl->syscalls.max_id) {
2102 /*
2103 * With libaudit we don't know beforehand what is the max_id,
2104 * so we let trace__read_syscall_info() figure that out as we
2105 * go on reading syscalls.
2106 */
2107 err = trace__read_syscall_info(trace, id);
2108 if (err)
2109 #endif
2110 goto out_cant_read;
2111 }
2112
2113 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2114 (err = trace__read_syscall_info(trace, id)) != 0)
2115 goto out_cant_read;
2116
2117 if (trace->syscalls.table[id].name == NULL) {
2118 if (trace->syscalls.table[id].nonexistent)
2119 return NULL;
2120 goto out_cant_read;
2121 }
2122
2123 return &trace->syscalls.table[id];
2124
2125 out_cant_read:
2126 if (verbose > 0) {
2127 char sbuf[STRERR_BUFSIZE];
2128 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2129 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2130 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2131 fputs(" information\n", trace->output);
2132 }
2133 return NULL;
2134 }
2135
2136 struct syscall_stats {
2137 struct stats stats;
2138 u64 nr_failures;
2139 int max_errno;
2140 u32 *errnos;
2141 };
2142
2143 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2144 int id, struct perf_sample *sample, long err, bool errno_summary)
2145 {
2146 struct int_node *inode;
2147 struct syscall_stats *stats;
2148 u64 duration = 0;
2149
2150 inode = intlist__findnew(ttrace->syscall_stats, id);
2151 if (inode == NULL)
2152 return;
2153
2154 stats = inode->priv;
2155 if (stats == NULL) {
2156 stats = malloc(sizeof(*stats));
2157 if (stats == NULL)
2158 return;
2159
2160 stats->nr_failures = 0;
2161 stats->max_errno = 0;
2162 stats->errnos = NULL;
2163 init_stats(&stats->stats);
2164 inode->priv = stats;
2165 }
2166
2167 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2168 duration = sample->time - ttrace->entry_time;
2169
2170 update_stats(&stats->stats, duration);
2171
2172 if (err < 0) {
2173 ++stats->nr_failures;
2174
2175 if (!errno_summary)
2176 return;
2177
2178 err = -err;
2179 if (err > stats->max_errno) {
2180 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2181
2182 if (new_errnos) {
2183 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2184 } else {
2185 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2186 thread__comm_str(thread), thread->pid_, thread->tid);
2187 return;
2188 }
2189
2190 stats->errnos = new_errnos;
2191 stats->max_errno = err;
2192 }
2193
2194 ++stats->errnos[err - 1];
2195 }
2196 }
2197
2198 static int trace__printf_interrupted_entry(struct trace *trace)
2199 {
2200 struct thread_trace *ttrace;
2201 size_t printed;
2202 int len;
2203
2204 if (trace->failure_only || trace->current == NULL)
2205 return 0;
2206
2207 ttrace = thread__priv(trace->current);
2208
2209 if (!ttrace->entry_pending)
2210 return 0;
2211
2212 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2213 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2214
2215 if (len < trace->args_alignment - 4)
2216 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2217
2218 printed += fprintf(trace->output, " ...\n");
2219
2220 ttrace->entry_pending = false;
2221 ++trace->nr_events_printed;
2222
2223 return printed;
2224 }
2225
2226 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2227 struct perf_sample *sample, struct thread *thread)
2228 {
2229 int printed = 0;
2230
2231 if (trace->print_sample) {
2232 double ts = (double)sample->time / NSEC_PER_MSEC;
2233
2234 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2235 evsel__name(evsel), ts,
2236 thread__comm_str(thread),
2237 sample->pid, sample->tid, sample->cpu);
2238 }
2239
2240 return printed;
2241 }
2242
2243 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2244 {
2245 void *augmented_args = NULL;
2246 /*
2247 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2248 * and there we get all 6 syscall args plus the tracepoint common fields
2249 * that gets calculated at the start and the syscall_nr (another long).
2250 * So we check if that is the case and if so don't look after the
2251 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2252 * which is fixed.
2253 *
2254 * We'll revisit this later to pass s->args_size to the BPF augmenter
2255 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2256 * copies only what we need for each syscall, like what happens when we
2257 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2258 * traffic to just what is needed for each syscall.
2259 */
2260 int args_size = raw_augmented_args_size ?: sc->args_size;
2261
2262 *augmented_args_size = sample->raw_size - args_size;
2263 if (*augmented_args_size > 0)
2264 augmented_args = sample->raw_data + args_size;
2265
2266 return augmented_args;
2267 }
2268
2269 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2270 union perf_event *event __maybe_unused,
2271 struct perf_sample *sample)
2272 {
2273 char *msg;
2274 void *args;
2275 int printed = 0;
2276 struct thread *thread;
2277 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2278 int augmented_args_size = 0;
2279 void *augmented_args = NULL;
2280 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2281 struct thread_trace *ttrace;
2282
2283 if (sc == NULL)
2284 return -1;
2285
2286 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2287 ttrace = thread__trace(thread, trace->output);
2288 if (ttrace == NULL)
2289 goto out_put;
2290
2291 trace__fprintf_sample(trace, evsel, sample, thread);
2292
2293 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2294
2295 if (ttrace->entry_str == NULL) {
2296 ttrace->entry_str = malloc(trace__entry_str_size);
2297 if (!ttrace->entry_str)
2298 goto out_put;
2299 }
2300
2301 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2302 trace__printf_interrupted_entry(trace);
2303 /*
2304 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2305 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2306 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2307 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2308 * so when handling, say the openat syscall, we end up getting 6 args for the
2309 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2310 * thinking that the extra 2 u64 args are the augmented filename, so just check
2311 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2312 */
2313 if (evsel != trace->syscalls.events.sys_enter)
2314 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2315 ttrace->entry_time = sample->time;
2316 msg = ttrace->entry_str;
2317 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2318
2319 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2320 args, augmented_args, augmented_args_size, trace, thread);
2321
2322 if (sc->is_exit) {
2323 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2324 int alignment = 0;
2325
2326 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2327 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2328 if (trace->args_alignment > printed)
2329 alignment = trace->args_alignment - printed;
2330 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2331 }
2332 } else {
2333 ttrace->entry_pending = true;
2334 /* See trace__vfs_getname & trace__sys_exit */
2335 ttrace->filename.pending_open = false;
2336 }
2337
2338 if (trace->current != thread) {
2339 thread__put(trace->current);
2340 trace->current = thread__get(thread);
2341 }
2342 err = 0;
2343 out_put:
2344 thread__put(thread);
2345 return err;
2346 }
2347
2348 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2349 struct perf_sample *sample)
2350 {
2351 struct thread_trace *ttrace;
2352 struct thread *thread;
2353 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2354 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2355 char msg[1024];
2356 void *args, *augmented_args = NULL;
2357 int augmented_args_size;
2358
2359 if (sc == NULL)
2360 return -1;
2361
2362 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2363 ttrace = thread__trace(thread, trace->output);
2364 /*
2365 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2366 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2367 */
2368 if (ttrace == NULL)
2369 goto out_put;
2370
2371 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2372 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2373 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2374 fprintf(trace->output, "%s", msg);
2375 err = 0;
2376 out_put:
2377 thread__put(thread);
2378 return err;
2379 }
2380
2381 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2382 struct perf_sample *sample,
2383 struct callchain_cursor *cursor)
2384 {
2385 struct addr_location al;
2386 int max_stack = evsel->core.attr.sample_max_stack ?
2387 evsel->core.attr.sample_max_stack :
2388 trace->max_stack;
2389 int err;
2390
2391 if (machine__resolve(trace->host, &al, sample) < 0)
2392 return -1;
2393
2394 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2395 addr_location__put(&al);
2396 return err;
2397 }
2398
2399 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2400 {
2401 /* TODO: user-configurable print_opts */
2402 const unsigned int print_opts = EVSEL__PRINT_SYM |
2403 EVSEL__PRINT_DSO |
2404 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2405
2406 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2407 }
2408
2409 static const char *errno_to_name(struct evsel *evsel, int err)
2410 {
2411 struct perf_env *env = evsel__env(evsel);
2412 const char *arch_name = perf_env__arch(env);
2413
2414 return arch_syscalls__strerrno(arch_name, err);
2415 }
2416
2417 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2418 union perf_event *event __maybe_unused,
2419 struct perf_sample *sample)
2420 {
2421 long ret;
2422 u64 duration = 0;
2423 bool duration_calculated = false;
2424 struct thread *thread;
2425 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2426 int alignment = trace->args_alignment;
2427 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2428 struct thread_trace *ttrace;
2429
2430 if (sc == NULL)
2431 return -1;
2432
2433 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2434 ttrace = thread__trace(thread, trace->output);
2435 if (ttrace == NULL)
2436 goto out_put;
2437
2438 trace__fprintf_sample(trace, evsel, sample, thread);
2439
2440 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2441
2442 if (trace->summary)
2443 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2444
2445 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2446 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2447 ttrace->filename.pending_open = false;
2448 ++trace->stats.vfs_getname;
2449 }
2450
2451 if (ttrace->entry_time) {
2452 duration = sample->time - ttrace->entry_time;
2453 if (trace__filter_duration(trace, duration))
2454 goto out;
2455 duration_calculated = true;
2456 } else if (trace->duration_filter)
2457 goto out;
2458
2459 if (sample->callchain) {
2460 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2461 if (callchain_ret == 0) {
2462 if (callchain_cursor.nr < trace->min_stack)
2463 goto out;
2464 callchain_ret = 1;
2465 }
2466 }
2467
2468 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2469 goto out;
2470
2471 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2472
2473 if (ttrace->entry_pending) {
2474 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2475 } else {
2476 printed += fprintf(trace->output, " ... [");
2477 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2478 printed += 9;
2479 printed += fprintf(trace->output, "]: %s()", sc->name);
2480 }
2481
2482 printed++; /* the closing ')' */
2483
2484 if (alignment > printed)
2485 alignment -= printed;
2486 else
2487 alignment = 0;
2488
2489 fprintf(trace->output, ")%*s= ", alignment, " ");
2490
2491 if (sc->fmt == NULL) {
2492 if (ret < 0)
2493 goto errno_print;
2494 signed_print:
2495 fprintf(trace->output, "%ld", ret);
2496 } else if (ret < 0) {
2497 errno_print: {
2498 char bf[STRERR_BUFSIZE];
2499 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2500 *e = errno_to_name(evsel, -ret);
2501
2502 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2503 }
2504 } else if (ret == 0 && sc->fmt->timeout)
2505 fprintf(trace->output, "0 (Timeout)");
2506 else if (ttrace->ret_scnprintf) {
2507 char bf[1024];
2508 struct syscall_arg arg = {
2509 .val = ret,
2510 .thread = thread,
2511 .trace = trace,
2512 };
2513 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2514 ttrace->ret_scnprintf = NULL;
2515 fprintf(trace->output, "%s", bf);
2516 } else if (sc->fmt->hexret)
2517 fprintf(trace->output, "%#lx", ret);
2518 else if (sc->fmt->errpid) {
2519 struct thread *child = machine__find_thread(trace->host, ret, ret);
2520
2521 if (child != NULL) {
2522 fprintf(trace->output, "%ld", ret);
2523 if (child->comm_set)
2524 fprintf(trace->output, " (%s)", thread__comm_str(child));
2525 thread__put(child);
2526 }
2527 } else
2528 goto signed_print;
2529
2530 fputc('\n', trace->output);
2531
2532 /*
2533 * We only consider an 'event' for the sake of --max-events a non-filtered
2534 * sys_enter + sys_exit and other tracepoint events.
2535 */
2536 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2537 interrupted = true;
2538
2539 if (callchain_ret > 0)
2540 trace__fprintf_callchain(trace, sample);
2541 else if (callchain_ret < 0)
2542 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2543 out:
2544 ttrace->entry_pending = false;
2545 err = 0;
2546 out_put:
2547 thread__put(thread);
2548 return err;
2549 }
2550
2551 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2552 union perf_event *event __maybe_unused,
2553 struct perf_sample *sample)
2554 {
2555 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2556 struct thread_trace *ttrace;
2557 size_t filename_len, entry_str_len, to_move;
2558 ssize_t remaining_space;
2559 char *pos;
2560 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2561
2562 if (!thread)
2563 goto out;
2564
2565 ttrace = thread__priv(thread);
2566 if (!ttrace)
2567 goto out_put;
2568
2569 filename_len = strlen(filename);
2570 if (filename_len == 0)
2571 goto out_put;
2572
2573 if (ttrace->filename.namelen < filename_len) {
2574 char *f = realloc(ttrace->filename.name, filename_len + 1);
2575
2576 if (f == NULL)
2577 goto out_put;
2578
2579 ttrace->filename.namelen = filename_len;
2580 ttrace->filename.name = f;
2581 }
2582
2583 strcpy(ttrace->filename.name, filename);
2584 ttrace->filename.pending_open = true;
2585
2586 if (!ttrace->filename.ptr)
2587 goto out_put;
2588
2589 entry_str_len = strlen(ttrace->entry_str);
2590 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2591 if (remaining_space <= 0)
2592 goto out_put;
2593
2594 if (filename_len > (size_t)remaining_space) {
2595 filename += filename_len - remaining_space;
2596 filename_len = remaining_space;
2597 }
2598
2599 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2600 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2601 memmove(pos + filename_len, pos, to_move);
2602 memcpy(pos, filename, filename_len);
2603
2604 ttrace->filename.ptr = 0;
2605 ttrace->filename.entry_str_pos = 0;
2606 out_put:
2607 thread__put(thread);
2608 out:
2609 return 0;
2610 }
2611
2612 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2613 union perf_event *event __maybe_unused,
2614 struct perf_sample *sample)
2615 {
2616 u64 runtime = evsel__intval(evsel, sample, "runtime");
2617 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2618 struct thread *thread = machine__findnew_thread(trace->host,
2619 sample->pid,
2620 sample->tid);
2621 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2622
2623 if (ttrace == NULL)
2624 goto out_dump;
2625
2626 ttrace->runtime_ms += runtime_ms;
2627 trace->runtime_ms += runtime_ms;
2628 out_put:
2629 thread__put(thread);
2630 return 0;
2631
2632 out_dump:
2633 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2634 evsel->name,
2635 evsel__strval(evsel, sample, "comm"),
2636 (pid_t)evsel__intval(evsel, sample, "pid"),
2637 runtime,
2638 evsel__intval(evsel, sample, "vruntime"));
2639 goto out_put;
2640 }
2641
2642 static int bpf_output__printer(enum binary_printer_ops op,
2643 unsigned int val, void *extra __maybe_unused, FILE *fp)
2644 {
2645 unsigned char ch = (unsigned char)val;
2646
2647 switch (op) {
2648 case BINARY_PRINT_CHAR_DATA:
2649 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2650 case BINARY_PRINT_DATA_BEGIN:
2651 case BINARY_PRINT_LINE_BEGIN:
2652 case BINARY_PRINT_ADDR:
2653 case BINARY_PRINT_NUM_DATA:
2654 case BINARY_PRINT_NUM_PAD:
2655 case BINARY_PRINT_SEP:
2656 case BINARY_PRINT_CHAR_PAD:
2657 case BINARY_PRINT_LINE_END:
2658 case BINARY_PRINT_DATA_END:
2659 default:
2660 break;
2661 }
2662
2663 return 0;
2664 }
2665
2666 static void bpf_output__fprintf(struct trace *trace,
2667 struct perf_sample *sample)
2668 {
2669 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2670 bpf_output__printer, NULL, trace->output);
2671 ++trace->nr_events_printed;
2672 }
2673
2674 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2675 struct thread *thread, void *augmented_args, int augmented_args_size)
2676 {
2677 char bf[2048];
2678 size_t size = sizeof(bf);
2679 struct tep_format_field *field = evsel->tp_format->format.fields;
2680 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2681 size_t printed = 0;
2682 unsigned long val;
2683 u8 bit = 1;
2684 struct syscall_arg syscall_arg = {
2685 .augmented = {
2686 .size = augmented_args_size,
2687 .args = augmented_args,
2688 },
2689 .idx = 0,
2690 .mask = 0,
2691 .trace = trace,
2692 .thread = thread,
2693 .show_string_prefix = trace->show_string_prefix,
2694 };
2695
2696 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2697 if (syscall_arg.mask & bit)
2698 continue;
2699
2700 syscall_arg.len = 0;
2701 syscall_arg.fmt = arg;
2702 if (field->flags & TEP_FIELD_IS_ARRAY) {
2703 int offset = field->offset;
2704
2705 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2706 offset = format_field__intval(field, sample, evsel->needs_swap);
2707 syscall_arg.len = offset >> 16;
2708 offset &= 0xffff;
2709 }
2710
2711 val = (uintptr_t)(sample->raw_data + offset);
2712 } else
2713 val = format_field__intval(field, sample, evsel->needs_swap);
2714 /*
2715 * Some syscall args need some mask, most don't and
2716 * return val untouched.
2717 */
2718 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2719
2720 /*
2721 * Suppress this argument if its value is zero and
2722 * and we don't have a string associated in an
2723 * strarray for it.
2724 */
2725 if (val == 0 &&
2726 !trace->show_zeros &&
2727 !((arg->show_zero ||
2728 arg->scnprintf == SCA_STRARRAY ||
2729 arg->scnprintf == SCA_STRARRAYS) &&
2730 arg->parm))
2731 continue;
2732
2733 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2734
2735 /*
2736 * XXX Perhaps we should have a show_tp_arg_names,
2737 * leaving show_arg_names just for syscalls?
2738 */
2739 if (1 || trace->show_arg_names)
2740 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2741
2742 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2743 }
2744
2745 return printed + fprintf(trace->output, "%s", bf);
2746 }
2747
2748 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2749 union perf_event *event __maybe_unused,
2750 struct perf_sample *sample)
2751 {
2752 struct thread *thread;
2753 int callchain_ret = 0;
2754 /*
2755 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2756 * this event's max_events having been hit and this is an entry coming
2757 * from the ring buffer that we should discard, since the max events
2758 * have already been considered/printed.
2759 */
2760 if (evsel->disabled)
2761 return 0;
2762
2763 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2764
2765 if (sample->callchain) {
2766 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2767 if (callchain_ret == 0) {
2768 if (callchain_cursor.nr < trace->min_stack)
2769 goto out;
2770 callchain_ret = 1;
2771 }
2772 }
2773
2774 trace__printf_interrupted_entry(trace);
2775 trace__fprintf_tstamp(trace, sample->time, trace->output);
2776
2777 if (trace->trace_syscalls && trace->show_duration)
2778 fprintf(trace->output, "( ): ");
2779
2780 if (thread)
2781 trace__fprintf_comm_tid(trace, thread, trace->output);
2782
2783 if (evsel == trace->syscalls.events.augmented) {
2784 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2785 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2786
2787 if (sc) {
2788 fprintf(trace->output, "%s(", sc->name);
2789 trace__fprintf_sys_enter(trace, evsel, sample);
2790 fputc(')', trace->output);
2791 goto newline;
2792 }
2793
2794 /*
2795 * XXX: Not having the associated syscall info or not finding/adding
2796 * the thread should never happen, but if it does...
2797 * fall thru and print it as a bpf_output event.
2798 */
2799 }
2800
2801 fprintf(trace->output, "%s(", evsel->name);
2802
2803 if (evsel__is_bpf_output(evsel)) {
2804 bpf_output__fprintf(trace, sample);
2805 } else if (evsel->tp_format) {
2806 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2807 trace__fprintf_sys_enter(trace, evsel, sample)) {
2808 if (trace->libtraceevent_print) {
2809 event_format__fprintf(evsel->tp_format, sample->cpu,
2810 sample->raw_data, sample->raw_size,
2811 trace->output);
2812 } else {
2813 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2814 }
2815 }
2816 }
2817
2818 newline:
2819 fprintf(trace->output, ")\n");
2820
2821 if (callchain_ret > 0)
2822 trace__fprintf_callchain(trace, sample);
2823 else if (callchain_ret < 0)
2824 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2825
2826 ++trace->nr_events_printed;
2827
2828 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2829 evsel__disable(evsel);
2830 evsel__close(evsel);
2831 }
2832 out:
2833 thread__put(thread);
2834 return 0;
2835 }
2836
2837 static void print_location(FILE *f, struct perf_sample *sample,
2838 struct addr_location *al,
2839 bool print_dso, bool print_sym)
2840 {
2841
2842 if ((verbose > 0 || print_dso) && al->map)
2843 fprintf(f, "%s@", al->map->dso->long_name);
2844
2845 if ((verbose > 0 || print_sym) && al->sym)
2846 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2847 al->addr - al->sym->start);
2848 else if (al->map)
2849 fprintf(f, "0x%" PRIx64, al->addr);
2850 else
2851 fprintf(f, "0x%" PRIx64, sample->addr);
2852 }
2853
2854 static int trace__pgfault(struct trace *trace,
2855 struct evsel *evsel,
2856 union perf_event *event __maybe_unused,
2857 struct perf_sample *sample)
2858 {
2859 struct thread *thread;
2860 struct addr_location al;
2861 char map_type = 'd';
2862 struct thread_trace *ttrace;
2863 int err = -1;
2864 int callchain_ret = 0;
2865
2866 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2867
2868 if (sample->callchain) {
2869 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2870 if (callchain_ret == 0) {
2871 if (callchain_cursor.nr < trace->min_stack)
2872 goto out_put;
2873 callchain_ret = 1;
2874 }
2875 }
2876
2877 ttrace = thread__trace(thread, trace->output);
2878 if (ttrace == NULL)
2879 goto out_put;
2880
2881 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2882 ttrace->pfmaj++;
2883 else
2884 ttrace->pfmin++;
2885
2886 if (trace->summary_only)
2887 goto out;
2888
2889 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2890
2891 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2892
2893 fprintf(trace->output, "%sfault [",
2894 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2895 "maj" : "min");
2896
2897 print_location(trace->output, sample, &al, false, true);
2898
2899 fprintf(trace->output, "] => ");
2900
2901 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2902
2903 if (!al.map) {
2904 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2905
2906 if (al.map)
2907 map_type = 'x';
2908 else
2909 map_type = '?';
2910 }
2911
2912 print_location(trace->output, sample, &al, true, false);
2913
2914 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2915
2916 if (callchain_ret > 0)
2917 trace__fprintf_callchain(trace, sample);
2918 else if (callchain_ret < 0)
2919 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2920
2921 ++trace->nr_events_printed;
2922 out:
2923 err = 0;
2924 out_put:
2925 thread__put(thread);
2926 return err;
2927 }
2928
2929 static void trace__set_base_time(struct trace *trace,
2930 struct evsel *evsel,
2931 struct perf_sample *sample)
2932 {
2933 /*
2934 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2935 * and don't use sample->time unconditionally, we may end up having
2936 * some other event in the future without PERF_SAMPLE_TIME for good
2937 * reason, i.e. we may not be interested in its timestamps, just in
2938 * it taking place, picking some piece of information when it
2939 * appears in our event stream (vfs_getname comes to mind).
2940 */
2941 if (trace->base_time == 0 && !trace->full_time &&
2942 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2943 trace->base_time = sample->time;
2944 }
2945
2946 static int trace__process_sample(struct perf_tool *tool,
2947 union perf_event *event,
2948 struct perf_sample *sample,
2949 struct evsel *evsel,
2950 struct machine *machine __maybe_unused)
2951 {
2952 struct trace *trace = container_of(tool, struct trace, tool);
2953 struct thread *thread;
2954 int err = 0;
2955
2956 tracepoint_handler handler = evsel->handler;
2957
2958 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2959 if (thread && thread__is_filtered(thread))
2960 goto out;
2961
2962 trace__set_base_time(trace, evsel, sample);
2963
2964 if (handler) {
2965 ++trace->nr_events;
2966 handler(trace, evsel, event, sample);
2967 }
2968 out:
2969 thread__put(thread);
2970 return err;
2971 }
2972
2973 static int trace__record(struct trace *trace, int argc, const char **argv)
2974 {
2975 unsigned int rec_argc, i, j;
2976 const char **rec_argv;
2977 const char * const record_args[] = {
2978 "record",
2979 "-R",
2980 "-m", "1024",
2981 "-c", "1",
2982 };
2983 pid_t pid = getpid();
2984 char *filter = asprintf__tp_filter_pids(1, &pid);
2985 const char * const sc_args[] = { "-e", };
2986 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2987 const char * const majpf_args[] = { "-e", "major-faults" };
2988 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2989 const char * const minpf_args[] = { "-e", "minor-faults" };
2990 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2991 int err = -1;
2992
2993 /* +3 is for the event string below and the pid filter */
2994 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
2995 majpf_args_nr + minpf_args_nr + argc;
2996 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2997
2998 if (rec_argv == NULL || filter == NULL)
2999 goto out_free;
3000
3001 j = 0;
3002 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3003 rec_argv[j++] = record_args[i];
3004
3005 if (trace->trace_syscalls) {
3006 for (i = 0; i < sc_args_nr; i++)
3007 rec_argv[j++] = sc_args[i];
3008
3009 /* event string may be different for older kernels - e.g., RHEL6 */
3010 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3011 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3012 else if (is_valid_tracepoint("syscalls:sys_enter"))
3013 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3014 else {
3015 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3016 goto out_free;
3017 }
3018 }
3019
3020 rec_argv[j++] = "--filter";
3021 rec_argv[j++] = filter;
3022
3023 if (trace->trace_pgfaults & TRACE_PFMAJ)
3024 for (i = 0; i < majpf_args_nr; i++)
3025 rec_argv[j++] = majpf_args[i];
3026
3027 if (trace->trace_pgfaults & TRACE_PFMIN)
3028 for (i = 0; i < minpf_args_nr; i++)
3029 rec_argv[j++] = minpf_args[i];
3030
3031 for (i = 0; i < (unsigned int)argc; i++)
3032 rec_argv[j++] = argv[i];
3033
3034 err = cmd_record(j, rec_argv);
3035 out_free:
3036 free(filter);
3037 free(rec_argv);
3038 return err;
3039 }
3040
3041 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3042
3043 static bool evlist__add_vfs_getname(struct evlist *evlist)
3044 {
3045 bool found = false;
3046 struct evsel *evsel, *tmp;
3047 struct parse_events_error err;
3048 int ret;
3049
3050 bzero(&err, sizeof(err));
3051 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3052 if (ret) {
3053 free(err.str);
3054 free(err.help);
3055 free(err.first_str);
3056 free(err.first_help);
3057 return false;
3058 }
3059
3060 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3061 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3062 continue;
3063
3064 if (evsel__field(evsel, "pathname")) {
3065 evsel->handler = trace__vfs_getname;
3066 found = true;
3067 continue;
3068 }
3069
3070 list_del_init(&evsel->core.node);
3071 evsel->evlist = NULL;
3072 evsel__delete(evsel);
3073 }
3074
3075 return found;
3076 }
3077
3078 static struct evsel *evsel__new_pgfault(u64 config)
3079 {
3080 struct evsel *evsel;
3081 struct perf_event_attr attr = {
3082 .type = PERF_TYPE_SOFTWARE,
3083 .mmap_data = 1,
3084 };
3085
3086 attr.config = config;
3087 attr.sample_period = 1;
3088
3089 event_attr_init(&attr);
3090
3091 evsel = evsel__new(&attr);
3092 if (evsel)
3093 evsel->handler = trace__pgfault;
3094
3095 return evsel;
3096 }
3097
3098 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3099 {
3100 const u32 type = event->header.type;
3101 struct evsel *evsel;
3102
3103 if (type != PERF_RECORD_SAMPLE) {
3104 trace__process_event(trace, trace->host, event, sample);
3105 return;
3106 }
3107
3108 evsel = evlist__id2evsel(trace->evlist, sample->id);
3109 if (evsel == NULL) {
3110 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3111 return;
3112 }
3113
3114 if (evswitch__discard(&trace->evswitch, evsel))
3115 return;
3116
3117 trace__set_base_time(trace, evsel, sample);
3118
3119 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3120 sample->raw_data == NULL) {
3121 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3122 evsel__name(evsel), sample->tid,
3123 sample->cpu, sample->raw_size);
3124 } else {
3125 tracepoint_handler handler = evsel->handler;
3126 handler(trace, evsel, event, sample);
3127 }
3128
3129 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3130 interrupted = true;
3131 }
3132
3133 static int trace__add_syscall_newtp(struct trace *trace)
3134 {
3135 int ret = -1;
3136 struct evlist *evlist = trace->evlist;
3137 struct evsel *sys_enter, *sys_exit;
3138
3139 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3140 if (sys_enter == NULL)
3141 goto out;
3142
3143 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3144 goto out_delete_sys_enter;
3145
3146 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3147 if (sys_exit == NULL)
3148 goto out_delete_sys_enter;
3149
3150 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3151 goto out_delete_sys_exit;
3152
3153 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3154 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3155
3156 evlist__add(evlist, sys_enter);
3157 evlist__add(evlist, sys_exit);
3158
3159 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3160 /*
3161 * We're interested only in the user space callchain
3162 * leading to the syscall, allow overriding that for
3163 * debugging reasons using --kernel_syscall_callchains
3164 */
3165 sys_exit->core.attr.exclude_callchain_kernel = 1;
3166 }
3167
3168 trace->syscalls.events.sys_enter = sys_enter;
3169 trace->syscalls.events.sys_exit = sys_exit;
3170
3171 ret = 0;
3172 out:
3173 return ret;
3174
3175 out_delete_sys_exit:
3176 evsel__delete_priv(sys_exit);
3177 out_delete_sys_enter:
3178 evsel__delete_priv(sys_enter);
3179 goto out;
3180 }
3181
3182 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3183 {
3184 int err = -1;
3185 struct evsel *sys_exit;
3186 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3187 trace->ev_qualifier_ids.nr,
3188 trace->ev_qualifier_ids.entries);
3189
3190 if (filter == NULL)
3191 goto out_enomem;
3192
3193 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3194 sys_exit = trace->syscalls.events.sys_exit;
3195 err = evsel__append_tp_filter(sys_exit, filter);
3196 }
3197
3198 free(filter);
3199 out:
3200 return err;
3201 out_enomem:
3202 errno = ENOMEM;
3203 goto out;
3204 }
3205
3206 #ifdef HAVE_LIBBPF_SUPPORT
3207 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3208 {
3209 if (trace->bpf_obj == NULL)
3210 return NULL;
3211
3212 return bpf_object__find_map_by_name(trace->bpf_obj, name);
3213 }
3214
3215 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3216 {
3217 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
3218 }
3219
3220 static void trace__set_bpf_map_syscalls(struct trace *trace)
3221 {
3222 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
3223 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
3224 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
3225 }
3226
3227 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3228 {
3229 if (trace->bpf_obj == NULL)
3230 return NULL;
3231
3232 return bpf_object__find_program_by_title(trace->bpf_obj, name);
3233 }
3234
3235 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3236 const char *prog_name, const char *type)
3237 {
3238 struct bpf_program *prog;
3239
3240 if (prog_name == NULL) {
3241 char default_prog_name[256];
3242 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3243 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3244 if (prog != NULL)
3245 goto out_found;
3246 if (sc->fmt && sc->fmt->alias) {
3247 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3248 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3249 if (prog != NULL)
3250 goto out_found;
3251 }
3252 goto out_unaugmented;
3253 }
3254
3255 prog = trace__find_bpf_program_by_title(trace, prog_name);
3256
3257 if (prog != NULL) {
3258 out_found:
3259 return prog;
3260 }
3261
3262 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3263 prog_name, type, sc->name);
3264 out_unaugmented:
3265 return trace->syscalls.unaugmented_prog;
3266 }
3267
3268 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3269 {
3270 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3271
3272 if (sc == NULL)
3273 return;
3274
3275 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3276 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3277 }
3278
3279 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3280 {
3281 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3282 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3283 }
3284
3285 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3286 {
3287 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3288 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3289 }
3290
3291 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3292 {
3293 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3294 int arg = 0;
3295
3296 if (sc == NULL)
3297 goto out;
3298
3299 for (; arg < sc->nr_args; ++arg) {
3300 entry->string_args_len[arg] = 0;
3301 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3302 /* Should be set like strace -s strsize */
3303 entry->string_args_len[arg] = PATH_MAX;
3304 }
3305 }
3306 out:
3307 for (; arg < 6; ++arg)
3308 entry->string_args_len[arg] = 0;
3309 }
3310 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3311 {
3312 int fd = bpf_map__fd(trace->syscalls.map);
3313 struct bpf_map_syscall_entry value = {
3314 .enabled = !trace->not_ev_qualifier,
3315 };
3316 int err = 0;
3317 size_t i;
3318
3319 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3320 int key = trace->ev_qualifier_ids.entries[i];
3321
3322 if (value.enabled) {
3323 trace__init_bpf_map_syscall_args(trace, key, &value);
3324 trace__init_syscall_bpf_progs(trace, key);
3325 }
3326
3327 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3328 if (err)
3329 break;
3330 }
3331
3332 return err;
3333 }
3334
3335 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3336 {
3337 int fd = bpf_map__fd(trace->syscalls.map);
3338 struct bpf_map_syscall_entry value = {
3339 .enabled = enabled,
3340 };
3341 int err = 0, key;
3342
3343 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3344 if (enabled)
3345 trace__init_bpf_map_syscall_args(trace, key, &value);
3346
3347 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3348 if (err)
3349 break;
3350 }
3351
3352 return err;
3353 }
3354
3355 static int trace__init_syscalls_bpf_map(struct trace *trace)
3356 {
3357 bool enabled = true;
3358
3359 if (trace->ev_qualifier_ids.nr)
3360 enabled = trace->not_ev_qualifier;
3361
3362 return __trace__init_syscalls_bpf_map(trace, enabled);
3363 }
3364
3365 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3366 {
3367 struct tep_format_field *field, *candidate_field;
3368 int id;
3369
3370 /*
3371 * We're only interested in syscalls that have a pointer:
3372 */
3373 for (field = sc->args; field; field = field->next) {
3374 if (field->flags & TEP_FIELD_IS_POINTER)
3375 goto try_to_find_pair;
3376 }
3377
3378 return NULL;
3379
3380 try_to_find_pair:
3381 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3382 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3383 struct bpf_program *pair_prog;
3384 bool is_candidate = false;
3385
3386 if (pair == NULL || pair == sc ||
3387 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3388 continue;
3389
3390 for (field = sc->args, candidate_field = pair->args;
3391 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3392 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3393 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3394
3395 if (is_pointer) {
3396 if (!candidate_is_pointer) {
3397 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3398 continue;
3399 }
3400 } else {
3401 if (candidate_is_pointer) {
3402 // The candidate might copy a pointer we don't have, skip it.
3403 goto next_candidate;
3404 }
3405 continue;
3406 }
3407
3408 if (strcmp(field->type, candidate_field->type))
3409 goto next_candidate;
3410
3411 is_candidate = true;
3412 }
3413
3414 if (!is_candidate)
3415 goto next_candidate;
3416
3417 /*
3418 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3419 * then it may be collecting that and we then can't use it, as it would collect
3420 * more than what is common to the two syscalls.
3421 */
3422 if (candidate_field) {
3423 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3424 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3425 goto next_candidate;
3426 }
3427
3428 pair_prog = pair->bpf_prog.sys_enter;
3429 /*
3430 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3431 * have been searched for, so search it here and if it returns the
3432 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3433 * program for a filtered syscall on a non-filtered one.
3434 *
3435 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3436 * useful for "renameat2".
3437 */
3438 if (pair_prog == NULL) {
3439 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3440 if (pair_prog == trace->syscalls.unaugmented_prog)
3441 goto next_candidate;
3442 }
3443
3444 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3445 return pair_prog;
3446 next_candidate:
3447 continue;
3448 }
3449
3450 return NULL;
3451 }
3452
3453 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3454 {
3455 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3456 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3457 int err = 0, key;
3458
3459 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3460 int prog_fd;
3461
3462 if (!trace__syscall_enabled(trace, key))
3463 continue;
3464
3465 trace__init_syscall_bpf_progs(trace, key);
3466
3467 // It'll get at least the "!raw_syscalls:unaugmented"
3468 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3469 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3470 if (err)
3471 break;
3472 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3473 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3474 if (err)
3475 break;
3476 }
3477
3478 /*
3479 * Now lets do a second pass looking for enabled syscalls without
3480 * an augmenter that have a signature that is a superset of another
3481 * syscall with an augmenter so that we can auto-reuse it.
3482 *
3483 * I.e. if we have an augmenter for the "open" syscall that has
3484 * this signature:
3485 *
3486 * int open(const char *pathname, int flags, mode_t mode);
3487 *
3488 * I.e. that will collect just the first string argument, then we
3489 * can reuse it for the 'creat' syscall, that has this signature:
3490 *
3491 * int creat(const char *pathname, mode_t mode);
3492 *
3493 * and for:
3494 *
3495 * int stat(const char *pathname, struct stat *statbuf);
3496 * int lstat(const char *pathname, struct stat *statbuf);
3497 *
3498 * Because the 'open' augmenter will collect the first arg as a string,
3499 * and leave alone all the other args, which already helps with
3500 * beautifying 'stat' and 'lstat''s pathname arg.
3501 *
3502 * Then, in time, when 'stat' gets an augmenter that collects both
3503 * first and second arg (this one on the raw_syscalls:sys_exit prog
3504 * array tail call, then that one will be used.
3505 */
3506 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3507 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3508 struct bpf_program *pair_prog;
3509 int prog_fd;
3510
3511 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3512 continue;
3513
3514 /*
3515 * For now we're just reusing the sys_enter prog, and if it
3516 * already has an augmenter, we don't need to find one.
3517 */
3518 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3519 continue;
3520
3521 /*
3522 * Look at all the other syscalls for one that has a signature
3523 * that is close enough that we can share:
3524 */
3525 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3526 if (pair_prog == NULL)
3527 continue;
3528
3529 sc->bpf_prog.sys_enter = pair_prog;
3530
3531 /*
3532 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3533 * with the fd for the program we're reusing:
3534 */
3535 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3536 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3537 if (err)
3538 break;
3539 }
3540
3541
3542 return err;
3543 }
3544
3545 static void trace__delete_augmented_syscalls(struct trace *trace)
3546 {
3547 struct evsel *evsel, *tmp;
3548
3549 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3550 evsel__delete(trace->syscalls.events.augmented);
3551 trace->syscalls.events.augmented = NULL;
3552
3553 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3554 if (evsel->bpf_obj == trace->bpf_obj) {
3555 evlist__remove(trace->evlist, evsel);
3556 evsel__delete(evsel);
3557 }
3558
3559 }
3560
3561 bpf_object__close(trace->bpf_obj);
3562 trace->bpf_obj = NULL;
3563 }
3564 #else // HAVE_LIBBPF_SUPPORT
3565 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
3566 const char *name __maybe_unused)
3567 {
3568 return NULL;
3569 }
3570
3571 static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
3572 {
3573 }
3574
3575 static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
3576 {
3577 }
3578
3579 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3580 {
3581 return 0;
3582 }
3583
3584 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3585 {
3586 return 0;
3587 }
3588
3589 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3590 const char *name __maybe_unused)
3591 {
3592 return NULL;
3593 }
3594
3595 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3596 {
3597 return 0;
3598 }
3599
3600 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3601 {
3602 }
3603 #endif // HAVE_LIBBPF_SUPPORT
3604
3605 static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3606 {
3607 struct evsel *evsel;
3608
3609 evlist__for_each_entry(trace->evlist, evsel) {
3610 if (evsel == trace->syscalls.events.augmented ||
3611 evsel->bpf_obj == trace->bpf_obj)
3612 continue;
3613
3614 return false;
3615 }
3616
3617 return true;
3618 }
3619
3620 static int trace__set_ev_qualifier_filter(struct trace *trace)
3621 {
3622 if (trace->syscalls.map)
3623 return trace__set_ev_qualifier_bpf_filter(trace);
3624 if (trace->syscalls.events.sys_enter)
3625 return trace__set_ev_qualifier_tp_filter(trace);
3626 return 0;
3627 }
3628
3629 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3630 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3631 {
3632 int err = 0;
3633 #ifdef HAVE_LIBBPF_SUPPORT
3634 bool value = true;
3635 int map_fd = bpf_map__fd(map);
3636 size_t i;
3637
3638 for (i = 0; i < npids; ++i) {
3639 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3640 if (err)
3641 break;
3642 }
3643 #endif
3644 return err;
3645 }
3646
3647 static int trace__set_filter_loop_pids(struct trace *trace)
3648 {
3649 unsigned int nr = 1, err;
3650 pid_t pids[32] = {
3651 getpid(),
3652 };
3653 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3654
3655 while (thread && nr < ARRAY_SIZE(pids)) {
3656 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3657
3658 if (parent == NULL)
3659 break;
3660
3661 if (!strcmp(thread__comm_str(parent), "sshd") ||
3662 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3663 pids[nr++] = parent->tid;
3664 break;
3665 }
3666 thread = parent;
3667 }
3668
3669 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3670 if (!err && trace->filter_pids.map)
3671 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3672
3673 return err;
3674 }
3675
3676 static int trace__set_filter_pids(struct trace *trace)
3677 {
3678 int err = 0;
3679 /*
3680 * Better not use !target__has_task() here because we need to cover the
3681 * case where no threads were specified in the command line, but a
3682 * workload was, and in that case we will fill in the thread_map when
3683 * we fork the workload in evlist__prepare_workload.
3684 */
3685 if (trace->filter_pids.nr > 0) {
3686 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3687 trace->filter_pids.entries);
3688 if (!err && trace->filter_pids.map) {
3689 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3690 trace->filter_pids.entries);
3691 }
3692 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3693 err = trace__set_filter_loop_pids(trace);
3694 }
3695
3696 return err;
3697 }
3698
3699 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3700 {
3701 struct evlist *evlist = trace->evlist;
3702 struct perf_sample sample;
3703 int err = evlist__parse_sample(evlist, event, &sample);
3704
3705 if (err)
3706 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3707 else
3708 trace__handle_event(trace, event, &sample);
3709
3710 return 0;
3711 }
3712
3713 static int __trace__flush_events(struct trace *trace)
3714 {
3715 u64 first = ordered_events__first_time(&trace->oe.data);
3716 u64 flush = trace->oe.last - NSEC_PER_SEC;
3717
3718 /* Is there some thing to flush.. */
3719 if (first && first < flush)
3720 return ordered_events__flush_time(&trace->oe.data, flush);
3721
3722 return 0;
3723 }
3724
3725 static int trace__flush_events(struct trace *trace)
3726 {
3727 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3728 }
3729
3730 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3731 {
3732 int err;
3733
3734 if (!trace->sort_events)
3735 return __trace__deliver_event(trace, event);
3736
3737 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3738 if (err && err != -1)
3739 return err;
3740
3741 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3742 if (err)
3743 return err;
3744
3745 return trace__flush_events(trace);
3746 }
3747
3748 static int ordered_events__deliver_event(struct ordered_events *oe,
3749 struct ordered_event *event)
3750 {
3751 struct trace *trace = container_of(oe, struct trace, oe.data);
3752
3753 return __trace__deliver_event(trace, event->event);
3754 }
3755
3756 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3757 {
3758 struct tep_format_field *field;
3759 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3760
3761 if (evsel->tp_format == NULL || fmt == NULL)
3762 return NULL;
3763
3764 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3765 if (strcmp(field->name, arg) == 0)
3766 return fmt;
3767
3768 return NULL;
3769 }
3770
3771 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3772 {
3773 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3774
3775 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3776 char *right = tok + 1, *right_end;
3777
3778 if (*right == '=')
3779 ++right;
3780
3781 while (isspace(*right))
3782 ++right;
3783
3784 if (*right == '\0')
3785 break;
3786
3787 while (!isalpha(*left))
3788 if (++left == tok) {
3789 /*
3790 * Bail out, can't find the name of the argument that is being
3791 * used in the filter, let it try to set this filter, will fail later.
3792 */
3793 return 0;
3794 }
3795
3796 right_end = right + 1;
3797 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3798 ++right_end;
3799
3800 if (isalpha(*right)) {
3801 struct syscall_arg_fmt *fmt;
3802 int left_size = tok - left,
3803 right_size = right_end - right;
3804 char arg[128];
3805
3806 while (isspace(left[left_size - 1]))
3807 --left_size;
3808
3809 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3810
3811 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3812 if (fmt == NULL) {
3813 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3814 arg, evsel->name, evsel->filter);
3815 return -1;
3816 }
3817
3818 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3819 arg, (int)(right - tok), tok, right_size, right);
3820
3821 if (fmt->strtoul) {
3822 u64 val;
3823 struct syscall_arg syscall_arg = {
3824 .parm = fmt->parm,
3825 };
3826
3827 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3828 char *n, expansion[19];
3829 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3830 int expansion_offset = right - new_filter;
3831
3832 pr_debug("%s", expansion);
3833
3834 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3835 pr_debug(" out of memory!\n");
3836 free(new_filter);
3837 return -1;
3838 }
3839 if (new_filter != evsel->filter)
3840 free(new_filter);
3841 left = n + expansion_offset + expansion_lenght;
3842 new_filter = n;
3843 } else {
3844 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3845 right_size, right, arg, evsel->name, evsel->filter);
3846 return -1;
3847 }
3848 } else {
3849 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3850 arg, evsel->name, evsel->filter);
3851 return -1;
3852 }
3853
3854 pr_debug("\n");
3855 } else {
3856 left = right_end;
3857 }
3858 }
3859
3860 if (new_filter != evsel->filter) {
3861 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3862 evsel__set_filter(evsel, new_filter);
3863 free(new_filter);
3864 }
3865
3866 return 0;
3867 }
3868
3869 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3870 {
3871 struct evlist *evlist = trace->evlist;
3872 struct evsel *evsel;
3873
3874 evlist__for_each_entry(evlist, evsel) {
3875 if (evsel->filter == NULL)
3876 continue;
3877
3878 if (trace__expand_filter(trace, evsel)) {
3879 *err_evsel = evsel;
3880 return -1;
3881 }
3882 }
3883
3884 return 0;
3885 }
3886
3887 static int trace__run(struct trace *trace, int argc, const char **argv)
3888 {
3889 struct evlist *evlist = trace->evlist;
3890 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3891 int err = -1, i;
3892 unsigned long before;
3893 const bool forks = argc > 0;
3894 bool draining = false;
3895
3896 trace->live = true;
3897
3898 if (!trace->raw_augmented_syscalls) {
3899 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3900 goto out_error_raw_syscalls;
3901
3902 if (trace->trace_syscalls)
3903 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3904 }
3905
3906 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3907 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3908 if (pgfault_maj == NULL)
3909 goto out_error_mem;
3910 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3911 evlist__add(evlist, pgfault_maj);
3912 }
3913
3914 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3915 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3916 if (pgfault_min == NULL)
3917 goto out_error_mem;
3918 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3919 evlist__add(evlist, pgfault_min);
3920 }
3921
3922 if (trace->sched &&
3923 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3924 goto out_error_sched_stat_runtime;
3925 /*
3926 * If a global cgroup was set, apply it to all the events without an
3927 * explicit cgroup. I.e.:
3928 *
3929 * trace -G A -e sched:*switch
3930 *
3931 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3932 * _and_ sched:sched_switch to the 'A' cgroup, while:
3933 *
3934 * trace -e sched:*switch -G A
3935 *
3936 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3937 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3938 * a cgroup (on the root cgroup, sys wide, etc).
3939 *
3940 * Multiple cgroups:
3941 *
3942 * trace -G A -e sched:*switch -G B
3943 *
3944 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3945 * to the 'B' cgroup.
3946 *
3947 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3948 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3949 */
3950 if (trace->cgroup)
3951 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3952
3953 err = evlist__create_maps(evlist, &trace->opts.target);
3954 if (err < 0) {
3955 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3956 goto out_delete_evlist;
3957 }
3958
3959 err = trace__symbols_init(trace, evlist);
3960 if (err < 0) {
3961 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3962 goto out_delete_evlist;
3963 }
3964
3965 evlist__config(evlist, &trace->opts, &callchain_param);
3966
3967 signal(SIGCHLD, sig_handler);
3968 signal(SIGINT, sig_handler);
3969
3970 if (forks) {
3971 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
3972 if (err < 0) {
3973 fprintf(trace->output, "Couldn't run the workload!\n");
3974 goto out_delete_evlist;
3975 }
3976 }
3977
3978 err = evlist__open(evlist);
3979 if (err < 0)
3980 goto out_error_open;
3981
3982 err = bpf__apply_obj_config();
3983 if (err) {
3984 char errbuf[BUFSIZ];
3985
3986 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3987 pr_err("ERROR: Apply config to BPF failed: %s\n",
3988 errbuf);
3989 goto out_error_open;
3990 }
3991
3992 err = trace__set_filter_pids(trace);
3993 if (err < 0)
3994 goto out_error_mem;
3995
3996 if (trace->syscalls.map)
3997 trace__init_syscalls_bpf_map(trace);
3998
3999 if (trace->syscalls.prog_array.sys_enter)
4000 trace__init_syscalls_bpf_prog_array_maps(trace);
4001
4002 if (trace->ev_qualifier_ids.nr > 0) {
4003 err = trace__set_ev_qualifier_filter(trace);
4004 if (err < 0)
4005 goto out_errno;
4006
4007 if (trace->syscalls.events.sys_exit) {
4008 pr_debug("event qualifier tracepoint filter: %s\n",
4009 trace->syscalls.events.sys_exit->filter);
4010 }
4011 }
4012
4013 /*
4014 * If the "close" syscall is not traced, then we will not have the
4015 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
4016 * fd->pathname table and were ending up showing the last value set by
4017 * syscalls opening a pathname and associating it with a descriptor or
4018 * reading it from /proc/pid/fd/ in cases where that doesn't make
4019 * sense.
4020 *
4021 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
4022 * not in use.
4023 */
4024 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4025
4026 err = trace__expand_filters(trace, &evsel);
4027 if (err)
4028 goto out_delete_evlist;
4029 err = evlist__apply_filters(evlist, &evsel);
4030 if (err < 0)
4031 goto out_error_apply_filters;
4032
4033 if (trace->dump.map)
4034 bpf_map__fprintf(trace->dump.map, trace->output);
4035
4036 err = evlist__mmap(evlist, trace->opts.mmap_pages);
4037 if (err < 0)
4038 goto out_error_mmap;
4039
4040 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
4041 evlist__enable(evlist);
4042
4043 if (forks)
4044 evlist__start_workload(evlist);
4045
4046 if (trace->opts.initial_delay) {
4047 usleep(trace->opts.initial_delay * 1000);
4048 evlist__enable(evlist);
4049 }
4050
4051 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4052 evlist->core.threads->nr > 1 ||
4053 evlist__first(evlist)->core.attr.inherit;
4054
4055 /*
4056 * Now that we already used evsel->core.attr to ask the kernel to setup the
4057 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4058 * trace__resolve_callchain(), allowing per-event max-stack settings
4059 * to override an explicitly set --max-stack global setting.
4060 */
4061 evlist__for_each_entry(evlist, evsel) {
4062 if (evsel__has_callchain(evsel) &&
4063 evsel->core.attr.sample_max_stack == 0)
4064 evsel->core.attr.sample_max_stack = trace->max_stack;
4065 }
4066 again:
4067 before = trace->nr_events;
4068
4069 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4070 union perf_event *event;
4071 struct mmap *md;
4072
4073 md = &evlist->mmap[i];
4074 if (perf_mmap__read_init(&md->core) < 0)
4075 continue;
4076
4077 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4078 ++trace->nr_events;
4079
4080 err = trace__deliver_event(trace, event);
4081 if (err)
4082 goto out_disable;
4083
4084 perf_mmap__consume(&md->core);
4085
4086 if (interrupted)
4087 goto out_disable;
4088
4089 if (done && !draining) {
4090 evlist__disable(evlist);
4091 draining = true;
4092 }
4093 }
4094 perf_mmap__read_done(&md->core);
4095 }
4096
4097 if (trace->nr_events == before) {
4098 int timeout = done ? 100 : -1;
4099
4100 if (!draining && evlist__poll(evlist, timeout) > 0) {
4101 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4102 draining = true;
4103
4104 goto again;
4105 } else {
4106 if (trace__flush_events(trace))
4107 goto out_disable;
4108 }
4109 } else {
4110 goto again;
4111 }
4112
4113 out_disable:
4114 thread__zput(trace->current);
4115
4116 evlist__disable(evlist);
4117
4118 if (trace->sort_events)
4119 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4120
4121 if (!err) {
4122 if (trace->summary)
4123 trace__fprintf_thread_summary(trace, trace->output);
4124
4125 if (trace->show_tool_stats) {
4126 fprintf(trace->output, "Stats:\n "
4127 " vfs_getname : %" PRIu64 "\n"
4128 " proc_getname: %" PRIu64 "\n",
4129 trace->stats.vfs_getname,
4130 trace->stats.proc_getname);
4131 }
4132 }
4133
4134 out_delete_evlist:
4135 trace__symbols__exit(trace);
4136
4137 evlist__delete(evlist);
4138 cgroup__put(trace->cgroup);
4139 trace->evlist = NULL;
4140 trace->live = false;
4141 return err;
4142 {
4143 char errbuf[BUFSIZ];
4144
4145 out_error_sched_stat_runtime:
4146 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4147 goto out_error;
4148
4149 out_error_raw_syscalls:
4150 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4151 goto out_error;
4152
4153 out_error_mmap:
4154 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4155 goto out_error;
4156
4157 out_error_open:
4158 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4159
4160 out_error:
4161 fprintf(trace->output, "%s\n", errbuf);
4162 goto out_delete_evlist;
4163
4164 out_error_apply_filters:
4165 fprintf(trace->output,
4166 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4167 evsel->filter, evsel__name(evsel), errno,
4168 str_error_r(errno, errbuf, sizeof(errbuf)));
4169 goto out_delete_evlist;
4170 }
4171 out_error_mem:
4172 fprintf(trace->output, "Not enough memory to run!\n");
4173 goto out_delete_evlist;
4174
4175 out_errno:
4176 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4177 goto out_delete_evlist;
4178 }
4179
4180 static int trace__replay(struct trace *trace)
4181 {
4182 const struct evsel_str_handler handlers[] = {
4183 { "probe:vfs_getname", trace__vfs_getname, },
4184 };
4185 struct perf_data data = {
4186 .path = input_name,
4187 .mode = PERF_DATA_MODE_READ,
4188 .force = trace->force,
4189 };
4190 struct perf_session *session;
4191 struct evsel *evsel;
4192 int err = -1;
4193
4194 trace->tool.sample = trace__process_sample;
4195 trace->tool.mmap = perf_event__process_mmap;
4196 trace->tool.mmap2 = perf_event__process_mmap2;
4197 trace->tool.comm = perf_event__process_comm;
4198 trace->tool.exit = perf_event__process_exit;
4199 trace->tool.fork = perf_event__process_fork;
4200 trace->tool.attr = perf_event__process_attr;
4201 trace->tool.tracing_data = perf_event__process_tracing_data;
4202 trace->tool.build_id = perf_event__process_build_id;
4203 trace->tool.namespaces = perf_event__process_namespaces;
4204
4205 trace->tool.ordered_events = true;
4206 trace->tool.ordering_requires_timestamps = true;
4207
4208 /* add tid to output */
4209 trace->multiple_threads = true;
4210
4211 session = perf_session__new(&data, false, &trace->tool);
4212 if (IS_ERR(session))
4213 return PTR_ERR(session);
4214
4215 if (trace->opts.target.pid)
4216 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4217
4218 if (trace->opts.target.tid)
4219 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4220
4221 if (symbol__init(&session->header.env) < 0)
4222 goto out;
4223
4224 trace->host = &session->machines.host;
4225
4226 err = perf_session__set_tracepoints_handlers(session, handlers);
4227 if (err)
4228 goto out;
4229
4230 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter");
4231 /* older kernels have syscalls tp versus raw_syscalls */
4232 if (evsel == NULL)
4233 evsel = evlist__find_tracepoint_by_name(session->evlist, "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 = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit");
4243 if (evsel == NULL)
4244 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit");
4245 if (evsel &&
4246 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4247 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4248 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4249 goto out;
4250 }
4251
4252 evlist__for_each_entry(session->evlist, evsel) {
4253 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4254 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4255 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4256 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4257 evsel->handler = trace__pgfault;
4258 }
4259
4260 setup_pager();
4261
4262 err = perf_session__process_events(session);
4263 if (err)
4264 pr_err("Failed to process events, error %d", err);
4265
4266 else if (trace->summary)
4267 trace__fprintf_thread_summary(trace, trace->output);
4268
4269 out:
4270 perf_session__delete(session);
4271
4272 return err;
4273 }
4274
4275 static size_t trace__fprintf_threads_header(FILE *fp)
4276 {
4277 size_t printed;
4278
4279 printed = fprintf(fp, "\n Summary of events:\n\n");
4280
4281 return printed;
4282 }
4283
4284 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4285 struct syscall_stats *stats;
4286 double msecs;
4287 int syscall;
4288 )
4289 {
4290 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4291 struct syscall_stats *stats = source->priv;
4292
4293 entry->syscall = source->i;
4294 entry->stats = stats;
4295 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4296 }
4297
4298 static size_t thread__dump_stats(struct thread_trace *ttrace,
4299 struct trace *trace, FILE *fp)
4300 {
4301 size_t printed = 0;
4302 struct syscall *sc;
4303 struct rb_node *nd;
4304 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4305
4306 if (syscall_stats == NULL)
4307 return 0;
4308
4309 printed += fprintf(fp, "\n");
4310
4311 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4312 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4313 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4314
4315 resort_rb__for_each_entry(nd, syscall_stats) {
4316 struct syscall_stats *stats = syscall_stats_entry->stats;
4317 if (stats) {
4318 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4319 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4320 double avg = avg_stats(&stats->stats);
4321 double pct;
4322 u64 n = (u64)stats->stats.n;
4323
4324 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4325 avg /= NSEC_PER_MSEC;
4326
4327 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4328 printed += fprintf(fp, " %-15s", sc->name);
4329 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4330 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4331 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4332
4333 if (trace->errno_summary && stats->nr_failures) {
4334 const char *arch_name = perf_env__arch(trace->host->env);
4335 int e;
4336
4337 for (e = 0; e < stats->max_errno; ++e) {
4338 if (stats->errnos[e] != 0)
4339 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4340 }
4341 }
4342 }
4343 }
4344
4345 resort_rb__delete(syscall_stats);
4346 printed += fprintf(fp, "\n\n");
4347
4348 return printed;
4349 }
4350
4351 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4352 {
4353 size_t printed = 0;
4354 struct thread_trace *ttrace = thread__priv(thread);
4355 double ratio;
4356
4357 if (ttrace == NULL)
4358 return 0;
4359
4360 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4361
4362 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4363 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4364 printed += fprintf(fp, "%.1f%%", ratio);
4365 if (ttrace->pfmaj)
4366 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4367 if (ttrace->pfmin)
4368 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4369 if (trace->sched)
4370 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4371 else if (fputc('\n', fp) != EOF)
4372 ++printed;
4373
4374 printed += thread__dump_stats(ttrace, trace, fp);
4375
4376 return printed;
4377 }
4378
4379 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4380 {
4381 return ttrace ? ttrace->nr_events : 0;
4382 }
4383
4384 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4385 struct thread *thread;
4386 )
4387 {
4388 entry->thread = rb_entry(nd, struct thread, rb_node);
4389 }
4390
4391 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4392 {
4393 size_t printed = trace__fprintf_threads_header(fp);
4394 struct rb_node *nd;
4395 int i;
4396
4397 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4398 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4399
4400 if (threads == NULL) {
4401 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4402 return 0;
4403 }
4404
4405 resort_rb__for_each_entry(nd, threads)
4406 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4407
4408 resort_rb__delete(threads);
4409 }
4410 return printed;
4411 }
4412
4413 static int trace__set_duration(const struct option *opt, const char *str,
4414 int unset __maybe_unused)
4415 {
4416 struct trace *trace = opt->value;
4417
4418 trace->duration_filter = atof(str);
4419 return 0;
4420 }
4421
4422 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4423 int unset __maybe_unused)
4424 {
4425 int ret = -1;
4426 size_t i;
4427 struct trace *trace = opt->value;
4428 /*
4429 * FIXME: introduce a intarray class, plain parse csv and create a
4430 * { int nr, int entries[] } struct...
4431 */
4432 struct intlist *list = intlist__new(str);
4433
4434 if (list == NULL)
4435 return -1;
4436
4437 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4438 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4439
4440 if (trace->filter_pids.entries == NULL)
4441 goto out;
4442
4443 trace->filter_pids.entries[0] = getpid();
4444
4445 for (i = 1; i < trace->filter_pids.nr; ++i)
4446 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4447
4448 intlist__delete(list);
4449 ret = 0;
4450 out:
4451 return ret;
4452 }
4453
4454 static int trace__open_output(struct trace *trace, const char *filename)
4455 {
4456 struct stat st;
4457
4458 if (!stat(filename, &st) && st.st_size) {
4459 char oldname[PATH_MAX];
4460
4461 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4462 unlink(oldname);
4463 rename(filename, oldname);
4464 }
4465
4466 trace->output = fopen(filename, "w");
4467
4468 return trace->output == NULL ? -errno : 0;
4469 }
4470
4471 static int parse_pagefaults(const struct option *opt, const char *str,
4472 int unset __maybe_unused)
4473 {
4474 int *trace_pgfaults = opt->value;
4475
4476 if (strcmp(str, "all") == 0)
4477 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4478 else if (strcmp(str, "maj") == 0)
4479 *trace_pgfaults |= TRACE_PFMAJ;
4480 else if (strcmp(str, "min") == 0)
4481 *trace_pgfaults |= TRACE_PFMIN;
4482 else
4483 return -1;
4484
4485 return 0;
4486 }
4487
4488 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4489 {
4490 struct evsel *evsel;
4491
4492 evlist__for_each_entry(evlist, evsel) {
4493 if (evsel->handler == NULL)
4494 evsel->handler = handler;
4495 }
4496 }
4497
4498 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4499 {
4500 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4501
4502 if (fmt) {
4503 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4504
4505 if (scfmt) {
4506 int skip = 0;
4507
4508 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4509 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4510 ++skip;
4511
4512 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4513 }
4514 }
4515 }
4516
4517 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4518 {
4519 struct evsel *evsel;
4520
4521 evlist__for_each_entry(evlist, evsel) {
4522 if (evsel->priv || !evsel->tp_format)
4523 continue;
4524
4525 if (strcmp(evsel->tp_format->system, "syscalls")) {
4526 evsel__init_tp_arg_scnprintf(evsel);
4527 continue;
4528 }
4529
4530 if (evsel__init_syscall_tp(evsel))
4531 return -1;
4532
4533 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4534 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4535
4536 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4537 return -1;
4538
4539 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4540 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4541 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4542
4543 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4544 return -1;
4545
4546 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4547 }
4548 }
4549
4550 return 0;
4551 }
4552
4553 /*
4554 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4555 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4556 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4557 *
4558 * It'd be better to introduce a parse_options() variant that would return a
4559 * list with the terms it didn't match to an event...
4560 */
4561 static int trace__parse_events_option(const struct option *opt, const char *str,
4562 int unset __maybe_unused)
4563 {
4564 struct trace *trace = (struct trace *)opt->value;
4565 const char *s = str;
4566 char *sep = NULL, *lists[2] = { NULL, NULL, };
4567 int len = strlen(str) + 1, err = -1, list, idx;
4568 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4569 char group_name[PATH_MAX];
4570 struct syscall_fmt *fmt;
4571
4572 if (strace_groups_dir == NULL)
4573 return -1;
4574
4575 if (*s == '!') {
4576 ++s;
4577 trace->not_ev_qualifier = true;
4578 }
4579
4580 while (1) {
4581 if ((sep = strchr(s, ',')) != NULL)
4582 *sep = '\0';
4583
4584 list = 0;
4585 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4586 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4587 list = 1;
4588 goto do_concat;
4589 }
4590
4591 fmt = syscall_fmt__find_by_alias(s);
4592 if (fmt != NULL) {
4593 list = 1;
4594 s = fmt->name;
4595 } else {
4596 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4597 if (access(group_name, R_OK) == 0)
4598 list = 1;
4599 }
4600 do_concat:
4601 if (lists[list]) {
4602 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4603 } else {
4604 lists[list] = malloc(len);
4605 if (lists[list] == NULL)
4606 goto out;
4607 strcpy(lists[list], s);
4608 }
4609
4610 if (!sep)
4611 break;
4612
4613 *sep = ',';
4614 s = sep + 1;
4615 }
4616
4617 if (lists[1] != NULL) {
4618 struct strlist_config slist_config = {
4619 .dirname = strace_groups_dir,
4620 };
4621
4622 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4623 if (trace->ev_qualifier == NULL) {
4624 fputs("Not enough memory to parse event qualifier", trace->output);
4625 goto out;
4626 }
4627
4628 if (trace__validate_ev_qualifier(trace))
4629 goto out;
4630 trace->trace_syscalls = true;
4631 }
4632
4633 err = 0;
4634
4635 if (lists[0]) {
4636 struct option o = {
4637 .value = &trace->evlist,
4638 };
4639 err = parse_events_option(&o, lists[0], 0);
4640 }
4641 out:
4642 if (sep)
4643 *sep = ',';
4644
4645 return err;
4646 }
4647
4648 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4649 {
4650 struct trace *trace = opt->value;
4651
4652 if (!list_empty(&trace->evlist->core.entries)) {
4653 struct option o = {
4654 .value = &trace->evlist,
4655 };
4656 return parse_cgroups(&o, str, unset);
4657 }
4658 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4659
4660 return 0;
4661 }
4662
4663 static int trace__config(const char *var, const char *value, void *arg)
4664 {
4665 struct trace *trace = arg;
4666 int err = 0;
4667
4668 if (!strcmp(var, "trace.add_events")) {
4669 trace->perfconfig_events = strdup(value);
4670 if (trace->perfconfig_events == NULL) {
4671 pr_err("Not enough memory for %s\n", "trace.add_events");
4672 return -1;
4673 }
4674 } else if (!strcmp(var, "trace.show_timestamp")) {
4675 trace->show_tstamp = perf_config_bool(var, value);
4676 } else if (!strcmp(var, "trace.show_duration")) {
4677 trace->show_duration = perf_config_bool(var, value);
4678 } else if (!strcmp(var, "trace.show_arg_names")) {
4679 trace->show_arg_names = perf_config_bool(var, value);
4680 if (!trace->show_arg_names)
4681 trace->show_zeros = true;
4682 } else if (!strcmp(var, "trace.show_zeros")) {
4683 bool new_show_zeros = perf_config_bool(var, value);
4684 if (!trace->show_arg_names && !new_show_zeros) {
4685 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4686 goto out;
4687 }
4688 trace->show_zeros = new_show_zeros;
4689 } else if (!strcmp(var, "trace.show_prefix")) {
4690 trace->show_string_prefix = perf_config_bool(var, value);
4691 } else if (!strcmp(var, "trace.no_inherit")) {
4692 trace->opts.no_inherit = perf_config_bool(var, value);
4693 } else if (!strcmp(var, "trace.args_alignment")) {
4694 int args_alignment = 0;
4695 if (perf_config_int(&args_alignment, var, value) == 0)
4696 trace->args_alignment = args_alignment;
4697 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4698 if (strcasecmp(value, "libtraceevent") == 0)
4699 trace->libtraceevent_print = true;
4700 else if (strcasecmp(value, "libbeauty") == 0)
4701 trace->libtraceevent_print = false;
4702 }
4703 out:
4704 return err;
4705 }
4706
4707 int cmd_trace(int argc, const char **argv)
4708 {
4709 const char *trace_usage[] = {
4710 "perf trace [<options>] [<command>]",
4711 "perf trace [<options>] -- <command> [<options>]",
4712 "perf trace record [<options>] [<command>]",
4713 "perf trace record [<options>] -- <command> [<options>]",
4714 NULL
4715 };
4716 struct trace trace = {
4717 .opts = {
4718 .target = {
4719 .uid = UINT_MAX,
4720 .uses_mmap = true,
4721 },
4722 .user_freq = UINT_MAX,
4723 .user_interval = ULLONG_MAX,
4724 .no_buffering = true,
4725 .mmap_pages = UINT_MAX,
4726 },
4727 .output = stderr,
4728 .show_comm = true,
4729 .show_tstamp = true,
4730 .show_duration = true,
4731 .show_arg_names = true,
4732 .args_alignment = 70,
4733 .trace_syscalls = false,
4734 .kernel_syscallchains = false,
4735 .max_stack = UINT_MAX,
4736 .max_events = ULONG_MAX,
4737 };
4738 const char *map_dump_str = NULL;
4739 const char *output_name = NULL;
4740 const struct option trace_options[] = {
4741 OPT_CALLBACK('e', "event", &trace, "event",
4742 "event/syscall selector. use 'perf list' to list available events",
4743 trace__parse_events_option),
4744 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4745 "event filter", parse_filter),
4746 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4747 "show the thread COMM next to its id"),
4748 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4749 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4750 trace__parse_events_option),
4751 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4752 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4753 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4754 "trace events on existing process id"),
4755 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4756 "trace events on existing thread id"),
4757 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4758 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4759 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4760 "system-wide collection from all CPUs"),
4761 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4762 "list of cpus to monitor"),
4763 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4764 "child tasks do not inherit counters"),
4765 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4766 "number of mmap data pages", 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 = 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