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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
92
93struct 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;
100 bool show_zero;
101};
102
103struct 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
117struct trace {
118 struct perf_tool tool;
119 struct syscalltbl *sctbl;
120 struct {
121 struct syscall *table;
122 struct bpf_map *map;
123 struct {
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
202struct 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) \
211static 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
218TP_UINT_FIELD(8);
219TP_UINT_FIELD(16);
220TP_UINT_FIELD(32);
221TP_UINT_FIELD(64);
222
223#define TP_UINT_FIELD__SWAPPED(bits) \
224static 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
231TP_UINT_FIELD__SWAPPED(16);
232TP_UINT_FIELD__SWAPPED(32);
233TP_UINT_FIELD__SWAPPED(64);
234
235static 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
259static 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
264static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
265{
266 return sample->raw_data + field->offset;
267}
268
269static 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
276static 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
281struct syscall_tp {
282 struct tp_field id;
283 union {
284 struct tp_field args, ret;
285 };
286};
287
288
289
290
291
292
293struct evsel_trace {
294 struct syscall_tp sc;
295 struct syscall_arg_fmt *fmt;
296};
297
298static struct evsel_trace *evsel_trace__new(void)
299{
300 return zalloc(sizeof(struct evsel_trace));
301}
302
303static 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
314
315
316static 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
323static 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
336
337static 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
344static 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
363out_delete:
364 evsel_trace__delete(evsel->priv);
365 evsel->priv = NULL;
366 return NULL;
367}
368
369static 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
383static 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
397static void evsel__delete_priv(struct evsel *evsel)
398{
399 zfree(&evsel->priv);
400 evsel__delete(evsel);
401}
402
403static 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
417static 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
435static 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
442static 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
449static 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
462static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
463{
464 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
465
466
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
478out_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
491size_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
505size_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
519static 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
526static 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
534bool 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
539bool 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
544bool 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
549size_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
554size_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
576bool 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
590bool 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
633bool 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
647size_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
657static 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
671static 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
676size_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
681size_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
688size_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
693size_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
698static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
699{
700
701
702
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
708static const char *bpf_cmd[] = {
709 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
710 "MAP_GET_NEXT_KEY", "PROG_LOAD",
711};
712static DEFINE_STRARRAY(bpf_cmd, "BPF_");
713
714static const char *fsmount_flags[] = {
715 [1] = "CLOEXEC",
716};
717static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
718
719#include "trace/beauty/generated/fsconfig_arrays.c"
720
721static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
722
723static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
724static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
725
726static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
727static DEFINE_STRARRAY(itimers, "ITIMER_");
728
729static 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};
736static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
737
738static const char *whences[] = { "SET", "CUR", "END",
739#ifdef SEEK_DATA
740"DATA",
741#endif
742#ifdef SEEK_HOLE
743"HOLE",
744#endif
745};
746static DEFINE_STRARRAY(whences, "SEEK_");
747
748static 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};
754static DEFINE_STRARRAY(fcntl_cmds, "F_");
755
756static 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
762static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
763
764static struct strarray *fcntl_cmds_arrays[] = {
765 &strarray__fcntl_cmds,
766 &strarray__fcntl_linux_specific_cmds,
767};
768
769static DEFINE_STRARRAYS(fcntl_cmds_arrays);
770
771static const char *rlimit_resources[] = {
772 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
773 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
774 "RTTIME",
775};
776static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
777
778static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
779static DEFINE_STRARRAY(sighow, "SIG_");
780
781static 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};
786static DEFINE_STRARRAY(clockid, "CLOCK_");
787
788static 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)
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
817static 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
822static 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
854static 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
905static struct syscall_fmt syscall_fmts[] = {
906 { .name = "access",
907 .arg = { [1] = { .scnprintf = SCA_ACCMODE, }, }, },
908 { .name = "arch_prctl",
909 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, },
910 [1] = { .scnprintf = SCA_PTR, }, }, },
911 { .name = "bind",
912 .arg = { [0] = { .scnprintf = SCA_INT, },
913 [1] = { .scnprintf = SCA_SOCKADDR, },
914 [2] = { .scnprintf = SCA_INT, }, }, },
915 { .name = "bpf",
916 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
917 { .name = "brk", .hexret = true,
918 .arg = { [0] = { .scnprintf = SCA_PTR, }, }, },
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, }, }, },
929 { .name = "connect",
930 .arg = { [0] = { .scnprintf = SCA_INT, },
931 [1] = { .scnprintf = SCA_SOCKADDR, },
932 [2] = { .scnprintf = SCA_INT, }, }, },
933 { .name = "epoll_ctl",
934 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
935 { .name = "eventfd2",
936 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, }, }, },
937 { .name = "fchmodat",
938 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
939 { .name = "fchownat",
940 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
941 { .name = "fcntl",
942 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD,
943 .strtoul = STUL_STRARRAYS,
944 .parm = &strarrays__fcntl_cmds_arrays,
945 .show_zero = true, },
946 [2] = { .scnprintf = SCA_FCNTL_ARG, }, }, },
947 { .name = "flock",
948 .arg = { [1] = { .scnprintf = SCA_FLOCK, }, }, },
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, }, }, },
954 { .name = "fspick",
955 .arg = { [0] = { .scnprintf = SCA_FDAT, },
956 [1] = { .scnprintf = SCA_FILENAME, },
957 [2] = { .scnprintf = SCA_FSPICK_FLAGS, }, }, },
958 { .name = "fstat", .alias = "newfstat", },
959 { .name = "fstatat", .alias = "newfstatat", },
960 { .name = "futex",
961 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, },
962 [5] = { .scnprintf = SCA_FUTEX_VAL3, }, }, },
963 { .name = "futimesat",
964 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
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, }, }, },
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
980
981 [1] = { .scnprintf = SCA_IOCTL_CMD, },
982 [2] = { .scnprintf = SCA_HEX, }, }, },
983#else
984 [2] = { .scnprintf = SCA_HEX, }, }, },
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, }, }, },
996 { .name = "linkat",
997 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
998 { .name = "lseek",
999 .arg = { [2] = STRARRAY(whence, whences), }, },
1000 { .name = "lstat", .alias = "newlstat", },
1001 { .name = "madvise",
1002 .arg = { [0] = { .scnprintf = SCA_HEX, },
1003 [2] = { .scnprintf = SCA_MADV_BHV, }, }, },
1004 { .name = "mkdirat",
1005 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1006 { .name = "mknodat",
1007 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1008 { .name = "mmap", .hexret = true,
1009
1010#if defined(__s390x__)
1011 .alias = "old_mmap",
1012#endif
1013 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, },
1014 [3] = { .scnprintf = SCA_MMAP_FLAGS,
1015 .strtoul = STUL_STRARRAY_FLAGS,
1016 .parm = &strarray__mmap_flags, },
1017 [5] = { .scnprintf = SCA_HEX, }, }, },
1018 { .name = "mount",
1019 .arg = { [0] = { .scnprintf = SCA_FILENAME, },
1020 [3] = { .scnprintf = SCA_MOUNT_FLAGS,
1021 .mask_val = SCAMV_MOUNT_FLAGS, }, }, },
1022 { .name = "move_mount",
1023 .arg = { [0] = { .scnprintf = SCA_FDAT, },
1024 [1] = { .scnprintf = SCA_FILENAME, },
1025 [2] = { .scnprintf = SCA_FDAT, },
1026 [3] = { .scnprintf = SCA_FILENAME, },
1027 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, }, }, },
1028 { .name = "mprotect",
1029 .arg = { [0] = { .scnprintf = SCA_HEX, },
1030 [2] = { .scnprintf = SCA_MMAP_PROT, }, }, },
1031 { .name = "mq_unlink",
1032 .arg = { [0] = { .scnprintf = SCA_FILENAME, }, }, },
1033 { .name = "mremap", .hexret = true,
1034 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, }, }, },
1035 { .name = "name_to_handle_at",
1036 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1037 { .name = "newfstatat",
1038 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1039 { .name = "open",
1040 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, }, }, },
1041 { .name = "open_by_handle_at",
1042 .arg = { [0] = { .scnprintf = SCA_FDAT, },
1043 [2] = { .scnprintf = SCA_OPEN_FLAGS, }, }, },
1044 { .name = "openat",
1045 .arg = { [0] = { .scnprintf = SCA_FDAT, },
1046 [2] = { .scnprintf = SCA_OPEN_FLAGS, }, }, },
1047 { .name = "perf_event_open",
1048 .arg = { [2] = { .scnprintf = SCA_INT, },
1049 [3] = { .scnprintf = SCA_FD, },
1050 [4] = { .scnprintf = SCA_PERF_FLAGS, }, }, },
1051 { .name = "pipe2",
1052 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, }, }, },
1053 { .name = "pkey_alloc",
1054 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, }, }, },
1055 { .name = "pkey_free",
1056 .arg = { [0] = { .scnprintf = SCA_INT, }, }, },
1057 { .name = "pkey_mprotect",
1058 .arg = { [0] = { .scnprintf = SCA_HEX, },
1059 [2] = { .scnprintf = SCA_MMAP_PROT, },
1060 [3] = { .scnprintf = SCA_INT, }, }, },
1061 { .name = "poll", .timeout = true, },
1062 { .name = "ppoll", .timeout = true, },
1063 { .name = "prctl",
1064 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION,
1065 .strtoul = STUL_STRARRAY,
1066 .parm = &strarray__prctl_options, },
1067 [1] = { .scnprintf = SCA_PRCTL_ARG2, },
1068 [2] = { .scnprintf = SCA_PRCTL_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, }, }, },
1076 { .name = "recvfrom",
1077 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, }, }, },
1078 { .name = "recvmmsg",
1079 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, }, }, },
1080 { .name = "recvmsg",
1081 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, }, }, },
1082 { .name = "renameat",
1083 .arg = { [0] = { .scnprintf = SCA_FDAT, },
1084 [2] = { .scnprintf = SCA_FDAT, }, }, },
1085 { .name = "renameat2",
1086 .arg = { [0] = { .scnprintf = SCA_FDAT, },
1087 [2] = { .scnprintf = SCA_FDAT, },
1088 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, }, }, },
1089 { .name = "rt_sigaction",
1090 .arg = { [0] = { .scnprintf = SCA_SIGNUM, }, }, },
1091 { .name = "rt_sigprocmask",
1092 .arg = { [0] = STRARRAY(how, sighow), }, },
1093 { .name = "rt_sigqueueinfo",
1094 .arg = { [1] = { .scnprintf = SCA_SIGNUM, }, }, },
1095 { .name = "rt_tgsigqueueinfo",
1096 .arg = { [2] = { .scnprintf = SCA_SIGNUM, }, }, },
1097 { .name = "sched_setscheduler",
1098 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, }, }, },
1099 { .name = "seccomp",
1100 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, },
1101 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, }, }, },
1102 { .name = "select", .timeout = true, },
1103 { .name = "sendfile", .alias = "sendfile64", },
1104 { .name = "sendmmsg",
1105 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, }, }, },
1106 { .name = "sendmsg",
1107 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, }, }, },
1108 { .name = "sendto",
1109 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, },
1110 [4] = { .scnprintf = SCA_SOCKADDR, }, }, },
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, },
1119 [2] = { .scnprintf = SCA_SK_PROTO, }, }, },
1120 { .name = "socketpair",
1121 .arg = { [0] = STRARRAY(family, socket_families),
1122 [1] = { .scnprintf = SCA_SK_TYPE, },
1123 [2] = { .scnprintf = SCA_SK_PROTO, }, }, },
1124 { .name = "stat", .alias = "newstat", },
1125 { .name = "statx",
1126 .arg = { [0] = { .scnprintf = SCA_FDAT, },
1127 [2] = { .scnprintf = SCA_STATX_FLAGS, } ,
1128 [3] = { .scnprintf = SCA_STATX_MASK, }, }, },
1129 { .name = "swapoff",
1130 .arg = { [0] = { .scnprintf = SCA_FILENAME, }, }, },
1131 { .name = "swapon",
1132 .arg = { [0] = { .scnprintf = SCA_FILENAME, }, }, },
1133 { .name = "symlinkat",
1134 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1135 { .name = "sync_file_range",
1136 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, }, }, },
1137 { .name = "tgkill",
1138 .arg = { [2] = { .scnprintf = SCA_SIGNUM, }, }, },
1139 { .name = "tkill",
1140 .arg = { [1] = { .scnprintf = SCA_SIGNUM, }, }, },
1141 { .name = "umount2", .alias = "umount",
1142 .arg = { [0] = { .scnprintf = SCA_FILENAME, }, }, },
1143 { .name = "uname", .alias = "newuname", },
1144 { .name = "unlinkat",
1145 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1146 { .name = "utimensat",
1147 .arg = { [0] = { .scnprintf = SCA_FDAT, }, }, },
1148 { .name = "wait4", .errpid = true,
1149 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, }, }, },
1150 { .name = "waitid", .errpid = true,
1151 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, }, }, },
1152};
1153
1154static 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
1160static 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
1165static 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
1171static 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
1183static 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
1191
1192
1193
1194
1195struct 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
1214
1215
1216
1217struct bpf_map_syscall_entry {
1218 bool enabled;
1219 u16 string_args_len[6];
1220};
1221
1222
1223
1224
1225
1226
1227
1228
1229static 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
1247
1248
1249
1250
1251
1252struct 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
1275static 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
1287static 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;
1304fail:
1305 color_fprintf(fp, PERF_COLOR_RED,
1306 "WARNING: not enough memory, dropping samples!\n");
1307 return NULL;
1308}
1309
1310
1311void 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
1322static const size_t trace__entry_str_size = 2048;
1323
1324static 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
1349struct file *thread__files_entry(struct thread *thread, int fd)
1350{
1351 return thread_trace__files_entry(thread__priv(thread), fd);
1352}
1353
1354static 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
1371static 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
1397static 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
1419size_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
1431size_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
1448static 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
1461static 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
1470static 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
1476
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
1486static 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
1501static bool trace__filter_duration(struct trace *trace, double t)
1502{
1503 return t < (trace->duration_filter * NSEC_PER_MSEC);
1504}
1505
1506static 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
1515
1516
1517
1518
1519static 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
1527static bool done = false;
1528static bool interrupted = false;
1529
1530static void sig_handler(int sig)
1531{
1532 done = true;
1533 interrupted = sig == SIGINT;
1534}
1535
1536static 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
1549static 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
1561static 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
1580static 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
1589static 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
1607static 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);
1625out:
1626 if (err)
1627 symbol__exit();
1628
1629 return err;
1630}
1631
1632static void trace__symbols__exit(struct trace *trace)
1633{
1634 machine__exit(trace->host);
1635 trace->host = NULL;
1636
1637 symbol__exit();
1638}
1639
1640static 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
1660static 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
1665static 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
1671static 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
1677static 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
1683static struct tep_format_field *
1684syscall_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
1716
1717
1718
1719
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
1735static 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
1745static 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
1760 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1761
1762 if (table == NULL)
1763 return -ENOMEM;
1764
1765
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
1804
1805
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
1818static 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
1830static int intcmp(const void *a, const void *b)
1831{
1832 const int *one = a, *another = b;
1833
1834 return *one - *another;
1835}
1836
1837static 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 }
1873matches:
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);
1901out:
1902 if (printed_invalid_prefix)
1903 pr_debug("\n");
1904 return err;
1905out_free:
1906 zfree(&trace->ev_qualifier_ids.entries);
1907 trace->ev_qualifier_ids.nr = 0;
1908 goto out;
1909}
1910
1911static __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
1929
1930
1931
1932
1933
1934
1935unsigned 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
1944static 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
1955
1956
1957
1958static 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
1966static 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
1978static 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
2001
2002
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
2018
2019
2020 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2021
2022
2023
2024
2025
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
2047
2048
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);
2058next_arg:
2059 ++arg.idx;
2060 bit <<= 1;
2061 }
2062 }
2063
2064 return printed;
2065}
2066
2067typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2068 union perf_event *event,
2069 struct perf_sample *sample);
2070
2071static 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
2080
2081
2082
2083
2084
2085
2086
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
2104
2105
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
2125out_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
2136struct syscall_stats {
2137 struct stats stats;
2138 u64 nr_failures;
2139 int max_errno;
2140 u32 *errnos;
2141};
2142
2143static 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
2198static 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
2226static 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
2243static 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
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
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
2269static void syscall__exit(struct syscall *sc)
2270{
2271 if (!sc)
2272 return;
2273
2274 free(sc->arg_fmt);
2275}
2276
2277static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2278 union perf_event *event __maybe_unused,
2279 struct perf_sample *sample)
2280{
2281 char *msg;
2282 void *args;
2283 int printed = 0;
2284 struct thread *thread;
2285 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2286 int augmented_args_size = 0;
2287 void *augmented_args = NULL;
2288 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2289 struct thread_trace *ttrace;
2290
2291 if (sc == NULL)
2292 return -1;
2293
2294 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2295 ttrace = thread__trace(thread, trace->output);
2296 if (ttrace == NULL)
2297 goto out_put;
2298
2299 trace__fprintf_sample(trace, evsel, sample, thread);
2300
2301 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2302
2303 if (ttrace->entry_str == NULL) {
2304 ttrace->entry_str = malloc(trace__entry_str_size);
2305 if (!ttrace->entry_str)
2306 goto out_put;
2307 }
2308
2309 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2310 trace__printf_interrupted_entry(trace);
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321 if (evsel != trace->syscalls.events.sys_enter)
2322 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2323 ttrace->entry_time = sample->time;
2324 msg = ttrace->entry_str;
2325 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2326
2327 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2328 args, augmented_args, augmented_args_size, trace, thread);
2329
2330 if (sc->is_exit) {
2331 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2332 int alignment = 0;
2333
2334 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2335 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2336 if (trace->args_alignment > printed)
2337 alignment = trace->args_alignment - printed;
2338 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2339 }
2340 } else {
2341 ttrace->entry_pending = true;
2342
2343 ttrace->filename.pending_open = false;
2344 }
2345
2346 if (trace->current != thread) {
2347 thread__put(trace->current);
2348 trace->current = thread__get(thread);
2349 }
2350 err = 0;
2351out_put:
2352 thread__put(thread);
2353 return err;
2354}
2355
2356static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2357 struct perf_sample *sample)
2358{
2359 struct thread_trace *ttrace;
2360 struct thread *thread;
2361 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2362 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2363 char msg[1024];
2364 void *args, *augmented_args = NULL;
2365 int augmented_args_size;
2366
2367 if (sc == NULL)
2368 return -1;
2369
2370 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2371 ttrace = thread__trace(thread, trace->output);
2372
2373
2374
2375
2376 if (ttrace == NULL)
2377 goto out_put;
2378
2379 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2380 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2381 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2382 fprintf(trace->output, "%s", msg);
2383 err = 0;
2384out_put:
2385 thread__put(thread);
2386 return err;
2387}
2388
2389static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2390 struct perf_sample *sample,
2391 struct callchain_cursor *cursor)
2392{
2393 struct addr_location al;
2394 int max_stack = evsel->core.attr.sample_max_stack ?
2395 evsel->core.attr.sample_max_stack :
2396 trace->max_stack;
2397 int err;
2398
2399 if (machine__resolve(trace->host, &al, sample) < 0)
2400 return -1;
2401
2402 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2403 addr_location__put(&al);
2404 return err;
2405}
2406
2407static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2408{
2409
2410 const unsigned int print_opts = EVSEL__PRINT_SYM |
2411 EVSEL__PRINT_DSO |
2412 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2413
2414 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2415}
2416
2417static const char *errno_to_name(struct evsel *evsel, int err)
2418{
2419 struct perf_env *env = evsel__env(evsel);
2420 const char *arch_name = perf_env__arch(env);
2421
2422 return arch_syscalls__strerrno(arch_name, err);
2423}
2424
2425static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2426 union perf_event *event __maybe_unused,
2427 struct perf_sample *sample)
2428{
2429 long ret;
2430 u64 duration = 0;
2431 bool duration_calculated = false;
2432 struct thread *thread;
2433 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2434 int alignment = trace->args_alignment;
2435 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2436 struct thread_trace *ttrace;
2437
2438 if (sc == NULL)
2439 return -1;
2440
2441 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2442 ttrace = thread__trace(thread, trace->output);
2443 if (ttrace == NULL)
2444 goto out_put;
2445
2446 trace__fprintf_sample(trace, evsel, sample, thread);
2447
2448 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2449
2450 if (trace->summary)
2451 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2452
2453 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2454 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2455 ttrace->filename.pending_open = false;
2456 ++trace->stats.vfs_getname;
2457 }
2458
2459 if (ttrace->entry_time) {
2460 duration = sample->time - ttrace->entry_time;
2461 if (trace__filter_duration(trace, duration))
2462 goto out;
2463 duration_calculated = true;
2464 } else if (trace->duration_filter)
2465 goto out;
2466
2467 if (sample->callchain) {
2468 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2469 if (callchain_ret == 0) {
2470 if (callchain_cursor.nr < trace->min_stack)
2471 goto out;
2472 callchain_ret = 1;
2473 }
2474 }
2475
2476 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2477 goto out;
2478
2479 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2480
2481 if (ttrace->entry_pending) {
2482 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2483 } else {
2484 printed += fprintf(trace->output, " ... [");
2485 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2486 printed += 9;
2487 printed += fprintf(trace->output, "]: %s()", sc->name);
2488 }
2489
2490 printed++;
2491
2492 if (alignment > printed)
2493 alignment -= printed;
2494 else
2495 alignment = 0;
2496
2497 fprintf(trace->output, ")%*s= ", alignment, " ");
2498
2499 if (sc->fmt == NULL) {
2500 if (ret < 0)
2501 goto errno_print;
2502signed_print:
2503 fprintf(trace->output, "%ld", ret);
2504 } else if (ret < 0) {
2505errno_print: {
2506 char bf[STRERR_BUFSIZE];
2507 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2508 *e = errno_to_name(evsel, -ret);
2509
2510 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2511 }
2512 } else if (ret == 0 && sc->fmt->timeout)
2513 fprintf(trace->output, "0 (Timeout)");
2514 else if (ttrace->ret_scnprintf) {
2515 char bf[1024];
2516 struct syscall_arg arg = {
2517 .val = ret,
2518 .thread = thread,
2519 .trace = trace,
2520 };
2521 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2522 ttrace->ret_scnprintf = NULL;
2523 fprintf(trace->output, "%s", bf);
2524 } else if (sc->fmt->hexret)
2525 fprintf(trace->output, "%#lx", ret);
2526 else if (sc->fmt->errpid) {
2527 struct thread *child = machine__find_thread(trace->host, ret, ret);
2528
2529 if (child != NULL) {
2530 fprintf(trace->output, "%ld", ret);
2531 if (child->comm_set)
2532 fprintf(trace->output, " (%s)", thread__comm_str(child));
2533 thread__put(child);
2534 }
2535 } else
2536 goto signed_print;
2537
2538 fputc('\n', trace->output);
2539
2540
2541
2542
2543
2544 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2545 interrupted = true;
2546
2547 if (callchain_ret > 0)
2548 trace__fprintf_callchain(trace, sample);
2549 else if (callchain_ret < 0)
2550 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2551out:
2552 ttrace->entry_pending = false;
2553 err = 0;
2554out_put:
2555 thread__put(thread);
2556 return err;
2557}
2558
2559static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2560 union perf_event *event __maybe_unused,
2561 struct perf_sample *sample)
2562{
2563 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2564 struct thread_trace *ttrace;
2565 size_t filename_len, entry_str_len, to_move;
2566 ssize_t remaining_space;
2567 char *pos;
2568 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2569
2570 if (!thread)
2571 goto out;
2572
2573 ttrace = thread__priv(thread);
2574 if (!ttrace)
2575 goto out_put;
2576
2577 filename_len = strlen(filename);
2578 if (filename_len == 0)
2579 goto out_put;
2580
2581 if (ttrace->filename.namelen < filename_len) {
2582 char *f = realloc(ttrace->filename.name, filename_len + 1);
2583
2584 if (f == NULL)
2585 goto out_put;
2586
2587 ttrace->filename.namelen = filename_len;
2588 ttrace->filename.name = f;
2589 }
2590
2591 strcpy(ttrace->filename.name, filename);
2592 ttrace->filename.pending_open = true;
2593
2594 if (!ttrace->filename.ptr)
2595 goto out_put;
2596
2597 entry_str_len = strlen(ttrace->entry_str);
2598 remaining_space = trace__entry_str_size - entry_str_len - 1;
2599 if (remaining_space <= 0)
2600 goto out_put;
2601
2602 if (filename_len > (size_t)remaining_space) {
2603 filename += filename_len - remaining_space;
2604 filename_len = remaining_space;
2605 }
2606
2607 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1;
2608 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2609 memmove(pos + filename_len, pos, to_move);
2610 memcpy(pos, filename, filename_len);
2611
2612 ttrace->filename.ptr = 0;
2613 ttrace->filename.entry_str_pos = 0;
2614out_put:
2615 thread__put(thread);
2616out:
2617 return 0;
2618}
2619
2620static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2621 union perf_event *event __maybe_unused,
2622 struct perf_sample *sample)
2623{
2624 u64 runtime = evsel__intval(evsel, sample, "runtime");
2625 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2626 struct thread *thread = machine__findnew_thread(trace->host,
2627 sample->pid,
2628 sample->tid);
2629 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2630
2631 if (ttrace == NULL)
2632 goto out_dump;
2633
2634 ttrace->runtime_ms += runtime_ms;
2635 trace->runtime_ms += runtime_ms;
2636out_put:
2637 thread__put(thread);
2638 return 0;
2639
2640out_dump:
2641 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2642 evsel->name,
2643 evsel__strval(evsel, sample, "comm"),
2644 (pid_t)evsel__intval(evsel, sample, "pid"),
2645 runtime,
2646 evsel__intval(evsel, sample, "vruntime"));
2647 goto out_put;
2648}
2649
2650static int bpf_output__printer(enum binary_printer_ops op,
2651 unsigned int val, void *extra __maybe_unused, FILE *fp)
2652{
2653 unsigned char ch = (unsigned char)val;
2654
2655 switch (op) {
2656 case BINARY_PRINT_CHAR_DATA:
2657 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2658 case BINARY_PRINT_DATA_BEGIN:
2659 case BINARY_PRINT_LINE_BEGIN:
2660 case BINARY_PRINT_ADDR:
2661 case BINARY_PRINT_NUM_DATA:
2662 case BINARY_PRINT_NUM_PAD:
2663 case BINARY_PRINT_SEP:
2664 case BINARY_PRINT_CHAR_PAD:
2665 case BINARY_PRINT_LINE_END:
2666 case BINARY_PRINT_DATA_END:
2667 default:
2668 break;
2669 }
2670
2671 return 0;
2672}
2673
2674static void bpf_output__fprintf(struct trace *trace,
2675 struct perf_sample *sample)
2676{
2677 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2678 bpf_output__printer, NULL, trace->output);
2679 ++trace->nr_events_printed;
2680}
2681
2682static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2683 struct thread *thread, void *augmented_args, int augmented_args_size)
2684{
2685 char bf[2048];
2686 size_t size = sizeof(bf);
2687 struct tep_format_field *field = evsel->tp_format->format.fields;
2688 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2689 size_t printed = 0;
2690 unsigned long val;
2691 u8 bit = 1;
2692 struct syscall_arg syscall_arg = {
2693 .augmented = {
2694 .size = augmented_args_size,
2695 .args = augmented_args,
2696 },
2697 .idx = 0,
2698 .mask = 0,
2699 .trace = trace,
2700 .thread = thread,
2701 .show_string_prefix = trace->show_string_prefix,
2702 };
2703
2704 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2705 if (syscall_arg.mask & bit)
2706 continue;
2707
2708 syscall_arg.len = 0;
2709 syscall_arg.fmt = arg;
2710 if (field->flags & TEP_FIELD_IS_ARRAY) {
2711 int offset = field->offset;
2712
2713 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2714 offset = format_field__intval(field, sample, evsel->needs_swap);
2715 syscall_arg.len = offset >> 16;
2716 offset &= 0xffff;
2717 }
2718
2719 val = (uintptr_t)(sample->raw_data + offset);
2720 } else
2721 val = format_field__intval(field, sample, evsel->needs_swap);
2722
2723
2724
2725
2726 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2727
2728
2729
2730
2731
2732
2733 if (val == 0 &&
2734 !trace->show_zeros &&
2735 !((arg->show_zero ||
2736 arg->scnprintf == SCA_STRARRAY ||
2737 arg->scnprintf == SCA_STRARRAYS) &&
2738 arg->parm))
2739 continue;
2740
2741 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2742
2743
2744
2745
2746
2747 if (1 || trace->show_arg_names)
2748 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2749
2750 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2751 }
2752
2753 return printed + fprintf(trace->output, "%s", bf);
2754}
2755
2756static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2757 union perf_event *event __maybe_unused,
2758 struct perf_sample *sample)
2759{
2760 struct thread *thread;
2761 int callchain_ret = 0;
2762
2763
2764
2765
2766
2767
2768 if (evsel->disabled)
2769 return 0;
2770
2771 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2772
2773 if (sample->callchain) {
2774 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2775 if (callchain_ret == 0) {
2776 if (callchain_cursor.nr < trace->min_stack)
2777 goto out;
2778 callchain_ret = 1;
2779 }
2780 }
2781
2782 trace__printf_interrupted_entry(trace);
2783 trace__fprintf_tstamp(trace, sample->time, trace->output);
2784
2785 if (trace->trace_syscalls && trace->show_duration)
2786 fprintf(trace->output, "( ): ");
2787
2788 if (thread)
2789 trace__fprintf_comm_tid(trace, thread, trace->output);
2790
2791 if (evsel == trace->syscalls.events.augmented) {
2792 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2793 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2794
2795 if (sc) {
2796 fprintf(trace->output, "%s(", sc->name);
2797 trace__fprintf_sys_enter(trace, evsel, sample);
2798 fputc(')', trace->output);
2799 goto newline;
2800 }
2801
2802
2803
2804
2805
2806
2807 }
2808
2809 fprintf(trace->output, "%s(", evsel->name);
2810
2811 if (evsel__is_bpf_output(evsel)) {
2812 bpf_output__fprintf(trace, sample);
2813 } else if (evsel->tp_format) {
2814 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2815 trace__fprintf_sys_enter(trace, evsel, sample)) {
2816 if (trace->libtraceevent_print) {
2817 event_format__fprintf(evsel->tp_format, sample->cpu,
2818 sample->raw_data, sample->raw_size,
2819 trace->output);
2820 } else {
2821 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2822 }
2823 }
2824 }
2825
2826newline:
2827 fprintf(trace->output, ")\n");
2828
2829 if (callchain_ret > 0)
2830 trace__fprintf_callchain(trace, sample);
2831 else if (callchain_ret < 0)
2832 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2833
2834 ++trace->nr_events_printed;
2835
2836 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2837 evsel__disable(evsel);
2838 evsel__close(evsel);
2839 }
2840out:
2841 thread__put(thread);
2842 return 0;
2843}
2844
2845static void print_location(FILE *f, struct perf_sample *sample,
2846 struct addr_location *al,
2847 bool print_dso, bool print_sym)
2848{
2849
2850 if ((verbose > 0 || print_dso) && al->map)
2851 fprintf(f, "%s@", al->map->dso->long_name);
2852
2853 if ((verbose > 0 || print_sym) && al->sym)
2854 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2855 al->addr - al->sym->start);
2856 else if (al->map)
2857 fprintf(f, "0x%" PRIx64, al->addr);
2858 else
2859 fprintf(f, "0x%" PRIx64, sample->addr);
2860}
2861
2862static int trace__pgfault(struct trace *trace,
2863 struct evsel *evsel,
2864 union perf_event *event __maybe_unused,
2865 struct perf_sample *sample)
2866{
2867 struct thread *thread;
2868 struct addr_location al;
2869 char map_type = 'd';
2870 struct thread_trace *ttrace;
2871 int err = -1;
2872 int callchain_ret = 0;
2873
2874 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2875
2876 if (sample->callchain) {
2877 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2878 if (callchain_ret == 0) {
2879 if (callchain_cursor.nr < trace->min_stack)
2880 goto out_put;
2881 callchain_ret = 1;
2882 }
2883 }
2884
2885 ttrace = thread__trace(thread, trace->output);
2886 if (ttrace == NULL)
2887 goto out_put;
2888
2889 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2890 ttrace->pfmaj++;
2891 else
2892 ttrace->pfmin++;
2893
2894 if (trace->summary_only)
2895 goto out;
2896
2897 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2898
2899 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2900
2901 fprintf(trace->output, "%sfault [",
2902 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2903 "maj" : "min");
2904
2905 print_location(trace->output, sample, &al, false, true);
2906
2907 fprintf(trace->output, "] => ");
2908
2909 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2910
2911 if (!al.map) {
2912 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2913
2914 if (al.map)
2915 map_type = 'x';
2916 else
2917 map_type = '?';
2918 }
2919
2920 print_location(trace->output, sample, &al, true, false);
2921
2922 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2923
2924 if (callchain_ret > 0)
2925 trace__fprintf_callchain(trace, sample);
2926 else if (callchain_ret < 0)
2927 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2928
2929 ++trace->nr_events_printed;
2930out:
2931 err = 0;
2932out_put:
2933 thread__put(thread);
2934 return err;
2935}
2936
2937static void trace__set_base_time(struct trace *trace,
2938 struct evsel *evsel,
2939 struct perf_sample *sample)
2940{
2941
2942
2943
2944
2945
2946
2947
2948
2949 if (trace->base_time == 0 && !trace->full_time &&
2950 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2951 trace->base_time = sample->time;
2952}
2953
2954static int trace__process_sample(struct perf_tool *tool,
2955 union perf_event *event,
2956 struct perf_sample *sample,
2957 struct evsel *evsel,
2958 struct machine *machine __maybe_unused)
2959{
2960 struct trace *trace = container_of(tool, struct trace, tool);
2961 struct thread *thread;
2962 int err = 0;
2963
2964 tracepoint_handler handler = evsel->handler;
2965
2966 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2967 if (thread && thread__is_filtered(thread))
2968 goto out;
2969
2970 trace__set_base_time(trace, evsel, sample);
2971
2972 if (handler) {
2973 ++trace->nr_events;
2974 handler(trace, evsel, event, sample);
2975 }
2976out:
2977 thread__put(thread);
2978 return err;
2979}
2980
2981static int trace__record(struct trace *trace, int argc, const char **argv)
2982{
2983 unsigned int rec_argc, i, j;
2984 const char **rec_argv;
2985 const char * const record_args[] = {
2986 "record",
2987 "-R",
2988 "-m", "1024",
2989 "-c", "1",
2990 };
2991 pid_t pid = getpid();
2992 char *filter = asprintf__tp_filter_pids(1, &pid);
2993 const char * const sc_args[] = { "-e", };
2994 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2995 const char * const majpf_args[] = { "-e", "major-faults" };
2996 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2997 const char * const minpf_args[] = { "-e", "minor-faults" };
2998 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2999 int err = -1;
3000
3001
3002 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3003 majpf_args_nr + minpf_args_nr + argc;
3004 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3005
3006 if (rec_argv == NULL || filter == NULL)
3007 goto out_free;
3008
3009 j = 0;
3010 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3011 rec_argv[j++] = record_args[i];
3012
3013 if (trace->trace_syscalls) {
3014 for (i = 0; i < sc_args_nr; i++)
3015 rec_argv[j++] = sc_args[i];
3016
3017
3018 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3019 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3020 else if (is_valid_tracepoint("syscalls:sys_enter"))
3021 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3022 else {
3023 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3024 goto out_free;
3025 }
3026 }
3027
3028 rec_argv[j++] = "--filter";
3029 rec_argv[j++] = filter;
3030
3031 if (trace->trace_pgfaults & TRACE_PFMAJ)
3032 for (i = 0; i < majpf_args_nr; i++)
3033 rec_argv[j++] = majpf_args[i];
3034
3035 if (trace->trace_pgfaults & TRACE_PFMIN)
3036 for (i = 0; i < minpf_args_nr; i++)
3037 rec_argv[j++] = minpf_args[i];
3038
3039 for (i = 0; i < (unsigned int)argc; i++)
3040 rec_argv[j++] = argv[i];
3041
3042 err = cmd_record(j, rec_argv);
3043out_free:
3044 free(filter);
3045 free(rec_argv);
3046 return err;
3047}
3048
3049static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3050
3051static bool evlist__add_vfs_getname(struct evlist *evlist)
3052{
3053 bool found = false;
3054 struct evsel *evsel, *tmp;
3055 struct parse_events_error err;
3056 int ret;
3057
3058 bzero(&err, sizeof(err));
3059 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3060 if (ret) {
3061 free(err.str);
3062 free(err.help);
3063 free(err.first_str);
3064 free(err.first_help);
3065 return false;
3066 }
3067
3068 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3069 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3070 continue;
3071
3072 if (evsel__field(evsel, "pathname")) {
3073 evsel->handler = trace__vfs_getname;
3074 found = true;
3075 continue;
3076 }
3077
3078 list_del_init(&evsel->core.node);
3079 evsel->evlist = NULL;
3080 evsel__delete(evsel);
3081 }
3082
3083 return found;
3084}
3085
3086static struct evsel *evsel__new_pgfault(u64 config)
3087{
3088 struct evsel *evsel;
3089 struct perf_event_attr attr = {
3090 .type = PERF_TYPE_SOFTWARE,
3091 .mmap_data = 1,
3092 };
3093
3094 attr.config = config;
3095 attr.sample_period = 1;
3096
3097 event_attr_init(&attr);
3098
3099 evsel = evsel__new(&attr);
3100 if (evsel)
3101 evsel->handler = trace__pgfault;
3102
3103 return evsel;
3104}
3105
3106static void evlist__free_syscall_tp_fields(struct evlist *evlist)
3107{
3108 struct evsel *evsel;
3109
3110 evlist__for_each_entry(evlist, evsel) {
3111 struct evsel_trace *et = evsel->priv;
3112
3113 if (!et || !evsel->tp_format || strcmp(evsel->tp_format->system, "syscalls"))
3114 continue;
3115
3116 free(et->fmt);
3117 free(et);
3118 }
3119}
3120
3121static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3122{
3123 const u32 type = event->header.type;
3124 struct evsel *evsel;
3125
3126 if (type != PERF_RECORD_SAMPLE) {
3127 trace__process_event(trace, trace->host, event, sample);
3128 return;
3129 }
3130
3131 evsel = evlist__id2evsel(trace->evlist, sample->id);
3132 if (evsel == NULL) {
3133 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3134 return;
3135 }
3136
3137 if (evswitch__discard(&trace->evswitch, evsel))
3138 return;
3139
3140 trace__set_base_time(trace, evsel, sample);
3141
3142 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3143 sample->raw_data == NULL) {
3144 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3145 evsel__name(evsel), sample->tid,
3146 sample->cpu, sample->raw_size);
3147 } else {
3148 tracepoint_handler handler = evsel->handler;
3149 handler(trace, evsel, event, sample);
3150 }
3151
3152 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3153 interrupted = true;
3154}
3155
3156static int trace__add_syscall_newtp(struct trace *trace)
3157{
3158 int ret = -1;
3159 struct evlist *evlist = trace->evlist;
3160 struct evsel *sys_enter, *sys_exit;
3161
3162 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3163 if (sys_enter == NULL)
3164 goto out;
3165
3166 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3167 goto out_delete_sys_enter;
3168
3169 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3170 if (sys_exit == NULL)
3171 goto out_delete_sys_enter;
3172
3173 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3174 goto out_delete_sys_exit;
3175
3176 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3177 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3178
3179 evlist__add(evlist, sys_enter);
3180 evlist__add(evlist, sys_exit);
3181
3182 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3183
3184
3185
3186
3187
3188 sys_exit->core.attr.exclude_callchain_kernel = 1;
3189 }
3190
3191 trace->syscalls.events.sys_enter = sys_enter;
3192 trace->syscalls.events.sys_exit = sys_exit;
3193
3194 ret = 0;
3195out:
3196 return ret;
3197
3198out_delete_sys_exit:
3199 evsel__delete_priv(sys_exit);
3200out_delete_sys_enter:
3201 evsel__delete_priv(sys_enter);
3202 goto out;
3203}
3204
3205static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3206{
3207 int err = -1;
3208 struct evsel *sys_exit;
3209 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3210 trace->ev_qualifier_ids.nr,
3211 trace->ev_qualifier_ids.entries);
3212
3213 if (filter == NULL)
3214 goto out_enomem;
3215
3216 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3217 sys_exit = trace->syscalls.events.sys_exit;
3218 err = evsel__append_tp_filter(sys_exit, filter);
3219 }
3220
3221 free(filter);
3222out:
3223 return err;
3224out_enomem:
3225 errno = ENOMEM;
3226 goto out;
3227}
3228
3229#ifdef HAVE_LIBBPF_SUPPORT
3230static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3231{
3232 if (trace->bpf_obj == NULL)
3233 return NULL;
3234
3235 return bpf_object__find_map_by_name(trace->bpf_obj, name);
3236}
3237
3238static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3239{
3240 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
3241}
3242
3243static void trace__set_bpf_map_syscalls(struct trace *trace)
3244{
3245 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
3246 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
3247 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
3248}
3249
3250static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3251{
3252 if (trace->bpf_obj == NULL)
3253 return NULL;
3254
3255 return bpf_object__find_program_by_title(trace->bpf_obj, name);
3256}
3257
3258static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3259 const char *prog_name, const char *type)
3260{
3261 struct bpf_program *prog;
3262
3263 if (prog_name == NULL) {
3264 char default_prog_name[256];
3265 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3266 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3267 if (prog != NULL)
3268 goto out_found;
3269 if (sc->fmt && sc->fmt->alias) {
3270 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3271 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3272 if (prog != NULL)
3273 goto out_found;
3274 }
3275 goto out_unaugmented;
3276 }
3277
3278 prog = trace__find_bpf_program_by_title(trace, prog_name);
3279
3280 if (prog != NULL) {
3281out_found:
3282 return prog;
3283 }
3284
3285 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3286 prog_name, type, sc->name);
3287out_unaugmented:
3288 return trace->syscalls.unaugmented_prog;
3289}
3290
3291static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3292{
3293 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3294
3295 if (sc == NULL)
3296 return;
3297
3298 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3299 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3300}
3301
3302static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3303{
3304 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3305 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3306}
3307
3308static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3309{
3310 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3311 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3312}
3313
3314static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3315{
3316 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3317 int arg = 0;
3318
3319 if (sc == NULL)
3320 goto out;
3321
3322 for (; arg < sc->nr_args; ++arg) {
3323 entry->string_args_len[arg] = 0;
3324 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3325
3326 entry->string_args_len[arg] = PATH_MAX;
3327 }
3328 }
3329out:
3330 for (; arg < 6; ++arg)
3331 entry->string_args_len[arg] = 0;
3332}
3333static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3334{
3335 int fd = bpf_map__fd(trace->syscalls.map);
3336 struct bpf_map_syscall_entry value = {
3337 .enabled = !trace->not_ev_qualifier,
3338 };
3339 int err = 0;
3340 size_t i;
3341
3342 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3343 int key = trace->ev_qualifier_ids.entries[i];
3344
3345 if (value.enabled) {
3346 trace__init_bpf_map_syscall_args(trace, key, &value);
3347 trace__init_syscall_bpf_progs(trace, key);
3348 }
3349
3350 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3351 if (err)
3352 break;
3353 }
3354
3355 return err;
3356}
3357
3358static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3359{
3360 int fd = bpf_map__fd(trace->syscalls.map);
3361 struct bpf_map_syscall_entry value = {
3362 .enabled = enabled,
3363 };
3364 int err = 0, key;
3365
3366 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3367 if (enabled)
3368 trace__init_bpf_map_syscall_args(trace, key, &value);
3369
3370 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3371 if (err)
3372 break;
3373 }
3374
3375 return err;
3376}
3377
3378static int trace__init_syscalls_bpf_map(struct trace *trace)
3379{
3380 bool enabled = true;
3381
3382 if (trace->ev_qualifier_ids.nr)
3383 enabled = trace->not_ev_qualifier;
3384
3385 return __trace__init_syscalls_bpf_map(trace, enabled);
3386}
3387
3388static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3389{
3390 struct tep_format_field *field, *candidate_field;
3391 int id;
3392
3393
3394
3395
3396 for (field = sc->args; field; field = field->next) {
3397 if (field->flags & TEP_FIELD_IS_POINTER)
3398 goto try_to_find_pair;
3399 }
3400
3401 return NULL;
3402
3403try_to_find_pair:
3404 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3405 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3406 struct bpf_program *pair_prog;
3407 bool is_candidate = false;
3408
3409 if (pair == NULL || pair == sc ||
3410 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3411 continue;
3412
3413 for (field = sc->args, candidate_field = pair->args;
3414 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3415 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3416 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3417
3418 if (is_pointer) {
3419 if (!candidate_is_pointer) {
3420
3421 continue;
3422 }
3423 } else {
3424 if (candidate_is_pointer) {
3425
3426 goto next_candidate;
3427 }
3428 continue;
3429 }
3430
3431 if (strcmp(field->type, candidate_field->type))
3432 goto next_candidate;
3433
3434 is_candidate = true;
3435 }
3436
3437 if (!is_candidate)
3438 goto next_candidate;
3439
3440
3441
3442
3443
3444
3445 if (candidate_field) {
3446 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3447 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3448 goto next_candidate;
3449 }
3450
3451 pair_prog = pair->bpf_prog.sys_enter;
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461 if (pair_prog == NULL) {
3462 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3463 if (pair_prog == trace->syscalls.unaugmented_prog)
3464 goto next_candidate;
3465 }
3466
3467 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3468 return pair_prog;
3469 next_candidate:
3470 continue;
3471 }
3472
3473 return NULL;
3474}
3475
3476static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3477{
3478 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3479 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3480 int err = 0, key;
3481
3482 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3483 int prog_fd;
3484
3485 if (!trace__syscall_enabled(trace, key))
3486 continue;
3487
3488 trace__init_syscall_bpf_progs(trace, key);
3489
3490
3491 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3492 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3493 if (err)
3494 break;
3495 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3496 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3497 if (err)
3498 break;
3499 }
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3530 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3531 struct bpf_program *pair_prog;
3532 int prog_fd;
3533
3534 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3535 continue;
3536
3537
3538
3539
3540
3541 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3542 continue;
3543
3544
3545
3546
3547
3548 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3549 if (pair_prog == NULL)
3550 continue;
3551
3552 sc->bpf_prog.sys_enter = pair_prog;
3553
3554
3555
3556
3557
3558 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3559 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3560 if (err)
3561 break;
3562 }
3563
3564
3565 return err;
3566}
3567
3568static void trace__delete_augmented_syscalls(struct trace *trace)
3569{
3570 struct evsel *evsel, *tmp;
3571
3572 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3573 evsel__delete(trace->syscalls.events.augmented);
3574 trace->syscalls.events.augmented = NULL;
3575
3576 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3577 if (evsel->bpf_obj == trace->bpf_obj) {
3578 evlist__remove(trace->evlist, evsel);
3579 evsel__delete(evsel);
3580 }
3581
3582 }
3583
3584 bpf_object__close(trace->bpf_obj);
3585 trace->bpf_obj = NULL;
3586}
3587#else
3588static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
3589 const char *name __maybe_unused)
3590{
3591 return NULL;
3592}
3593
3594static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
3595{
3596}
3597
3598static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
3599{
3600}
3601
3602static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3603{
3604 return 0;
3605}
3606
3607static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3608{
3609 return 0;
3610}
3611
3612static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3613 const char *name __maybe_unused)
3614{
3615 return NULL;
3616}
3617
3618static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3619{
3620 return 0;
3621}
3622
3623static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3624{
3625}
3626#endif
3627
3628static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3629{
3630 struct evsel *evsel;
3631
3632 evlist__for_each_entry(trace->evlist, evsel) {
3633 if (evsel == trace->syscalls.events.augmented ||
3634 evsel->bpf_obj == trace->bpf_obj)
3635 continue;
3636
3637 return false;
3638 }
3639
3640 return true;
3641}
3642
3643static int trace__set_ev_qualifier_filter(struct trace *trace)
3644{
3645 if (trace->syscalls.map)
3646 return trace__set_ev_qualifier_bpf_filter(trace);
3647 if (trace->syscalls.events.sys_enter)
3648 return trace__set_ev_qualifier_tp_filter(trace);
3649 return 0;
3650}
3651
3652static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3653 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3654{
3655 int err = 0;
3656#ifdef HAVE_LIBBPF_SUPPORT
3657 bool value = true;
3658 int map_fd = bpf_map__fd(map);
3659 size_t i;
3660
3661 for (i = 0; i < npids; ++i) {
3662 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3663 if (err)
3664 break;
3665 }
3666#endif
3667 return err;
3668}
3669
3670static int trace__set_filter_loop_pids(struct trace *trace)
3671{
3672 unsigned int nr = 1, err;
3673 pid_t pids[32] = {
3674 getpid(),
3675 };
3676 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3677
3678 while (thread && nr < ARRAY_SIZE(pids)) {
3679 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3680
3681 if (parent == NULL)
3682 break;
3683
3684 if (!strcmp(thread__comm_str(parent), "sshd") ||
3685 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3686 pids[nr++] = parent->tid;
3687 break;
3688 }
3689 thread = parent;
3690 }
3691
3692 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3693 if (!err && trace->filter_pids.map)
3694 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3695
3696 return err;
3697}
3698
3699static int trace__set_filter_pids(struct trace *trace)
3700{
3701 int err = 0;
3702
3703
3704
3705
3706
3707
3708 if (trace->filter_pids.nr > 0) {
3709 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3710 trace->filter_pids.entries);
3711 if (!err && trace->filter_pids.map) {
3712 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3713 trace->filter_pids.entries);
3714 }
3715 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3716 err = trace__set_filter_loop_pids(trace);
3717 }
3718
3719 return err;
3720}
3721
3722static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3723{
3724 struct evlist *evlist = trace->evlist;
3725 struct perf_sample sample;
3726 int err = evlist__parse_sample(evlist, event, &sample);
3727
3728 if (err)
3729 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3730 else
3731 trace__handle_event(trace, event, &sample);
3732
3733 return 0;
3734}
3735
3736static int __trace__flush_events(struct trace *trace)
3737{
3738 u64 first = ordered_events__first_time(&trace->oe.data);
3739 u64 flush = trace->oe.last - NSEC_PER_SEC;
3740
3741
3742 if (first && first < flush)
3743 return ordered_events__flush_time(&trace->oe.data, flush);
3744
3745 return 0;
3746}
3747
3748static int trace__flush_events(struct trace *trace)
3749{
3750 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3751}
3752
3753static int trace__deliver_event(struct trace *trace, union perf_event *event)
3754{
3755 int err;
3756
3757 if (!trace->sort_events)
3758 return __trace__deliver_event(trace, event);
3759
3760 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3761 if (err && err != -1)
3762 return err;
3763
3764 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3765 if (err)
3766 return err;
3767
3768 return trace__flush_events(trace);
3769}
3770
3771static int ordered_events__deliver_event(struct ordered_events *oe,
3772 struct ordered_event *event)
3773{
3774 struct trace *trace = container_of(oe, struct trace, oe.data);
3775
3776 return __trace__deliver_event(trace, event->event);
3777}
3778
3779static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3780{
3781 struct tep_format_field *field;
3782 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3783
3784 if (evsel->tp_format == NULL || fmt == NULL)
3785 return NULL;
3786
3787 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3788 if (strcmp(field->name, arg) == 0)
3789 return fmt;
3790
3791 return NULL;
3792}
3793
3794static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3795{
3796 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3797
3798 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3799 char *right = tok + 1, *right_end;
3800
3801 if (*right == '=')
3802 ++right;
3803
3804 while (isspace(*right))
3805 ++right;
3806
3807 if (*right == '\0')
3808 break;
3809
3810 while (!isalpha(*left))
3811 if (++left == tok) {
3812
3813
3814
3815
3816 return 0;
3817 }
3818
3819 right_end = right + 1;
3820 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3821 ++right_end;
3822
3823 if (isalpha(*right)) {
3824 struct syscall_arg_fmt *fmt;
3825 int left_size = tok - left,
3826 right_size = right_end - right;
3827 char arg[128];
3828
3829 while (isspace(left[left_size - 1]))
3830 --left_size;
3831
3832 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3833
3834 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3835 if (fmt == NULL) {
3836 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3837 arg, evsel->name, evsel->filter);
3838 return -1;
3839 }
3840
3841 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3842 arg, (int)(right - tok), tok, right_size, right);
3843
3844 if (fmt->strtoul) {
3845 u64 val;
3846 struct syscall_arg syscall_arg = {
3847 .parm = fmt->parm,
3848 };
3849
3850 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3851 char *n, expansion[19];
3852 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3853 int expansion_offset = right - new_filter;
3854
3855 pr_debug("%s", expansion);
3856
3857 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3858 pr_debug(" out of memory!\n");
3859 free(new_filter);
3860 return -1;
3861 }
3862 if (new_filter != evsel->filter)
3863 free(new_filter);
3864 left = n + expansion_offset + expansion_lenght;
3865 new_filter = n;
3866 } else {
3867 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3868 right_size, right, arg, evsel->name, evsel->filter);
3869 return -1;
3870 }
3871 } else {
3872 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3873 arg, evsel->name, evsel->filter);
3874 return -1;
3875 }
3876
3877 pr_debug("\n");
3878 } else {
3879 left = right_end;
3880 }
3881 }
3882
3883 if (new_filter != evsel->filter) {
3884 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3885 evsel__set_filter(evsel, new_filter);
3886 free(new_filter);
3887 }
3888
3889 return 0;
3890}
3891
3892static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3893{
3894 struct evlist *evlist = trace->evlist;
3895 struct evsel *evsel;
3896
3897 evlist__for_each_entry(evlist, evsel) {
3898 if (evsel->filter == NULL)
3899 continue;
3900
3901 if (trace__expand_filter(trace, evsel)) {
3902 *err_evsel = evsel;
3903 return -1;
3904 }
3905 }
3906
3907 return 0;
3908}
3909
3910static int trace__run(struct trace *trace, int argc, const char **argv)
3911{
3912 struct evlist *evlist = trace->evlist;
3913 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3914 int err = -1, i;
3915 unsigned long before;
3916 const bool forks = argc > 0;
3917 bool draining = false;
3918
3919 trace->live = true;
3920
3921 if (!trace->raw_augmented_syscalls) {
3922 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3923 goto out_error_raw_syscalls;
3924
3925 if (trace->trace_syscalls)
3926 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3927 }
3928
3929 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3930 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3931 if (pgfault_maj == NULL)
3932 goto out_error_mem;
3933 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3934 evlist__add(evlist, pgfault_maj);
3935 }
3936
3937 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3938 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3939 if (pgfault_min == NULL)
3940 goto out_error_mem;
3941 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3942 evlist__add(evlist, pgfault_min);
3943 }
3944
3945 if (trace->sched &&
3946 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3947 goto out_error_sched_stat_runtime;
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973 if (trace->cgroup)
3974 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3975
3976 err = evlist__create_maps(evlist, &trace->opts.target);
3977 if (err < 0) {
3978 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3979 goto out_delete_evlist;
3980 }
3981
3982 err = trace__symbols_init(trace, evlist);
3983 if (err < 0) {
3984 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3985 goto out_delete_evlist;
3986 }
3987
3988 evlist__config(evlist, &trace->opts, &callchain_param);
3989
3990 if (forks) {
3991 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
3992 if (err < 0) {
3993 fprintf(trace->output, "Couldn't run the workload!\n");
3994 goto out_delete_evlist;
3995 }
3996 }
3997
3998 err = evlist__open(evlist);
3999 if (err < 0)
4000 goto out_error_open;
4001
4002 err = bpf__apply_obj_config();
4003 if (err) {
4004 char errbuf[BUFSIZ];
4005
4006 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
4007 pr_err("ERROR: Apply config to BPF failed: %s\n",
4008 errbuf);
4009 goto out_error_open;
4010 }
4011
4012 err = trace__set_filter_pids(trace);
4013 if (err < 0)
4014 goto out_error_mem;
4015
4016 if (trace->syscalls.map)
4017 trace__init_syscalls_bpf_map(trace);
4018
4019 if (trace->syscalls.prog_array.sys_enter)
4020 trace__init_syscalls_bpf_prog_array_maps(trace);
4021
4022 if (trace->ev_qualifier_ids.nr > 0) {
4023 err = trace__set_ev_qualifier_filter(trace);
4024 if (err < 0)
4025 goto out_errno;
4026
4027 if (trace->syscalls.events.sys_exit) {
4028 pr_debug("event qualifier tracepoint filter: %s\n",
4029 trace->syscalls.events.sys_exit->filter);
4030 }
4031 }
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4045
4046 err = trace__expand_filters(trace, &evsel);
4047 if (err)
4048 goto out_delete_evlist;
4049 err = evlist__apply_filters(evlist, &evsel);
4050 if (err < 0)
4051 goto out_error_apply_filters;
4052
4053 if (trace->dump.map)
4054 bpf_map__fprintf(trace->dump.map, trace->output);
4055
4056 err = evlist__mmap(evlist, trace->opts.mmap_pages);
4057 if (err < 0)
4058 goto out_error_mmap;
4059
4060 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
4061 evlist__enable(evlist);
4062
4063 if (forks)
4064 evlist__start_workload(evlist);
4065
4066 if (trace->opts.initial_delay) {
4067 usleep(trace->opts.initial_delay * 1000);
4068 evlist__enable(evlist);
4069 }
4070
4071 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4072 evlist->core.threads->nr > 1 ||
4073 evlist__first(evlist)->core.attr.inherit;
4074
4075
4076
4077
4078
4079
4080
4081 evlist__for_each_entry(evlist, evsel) {
4082 if (evsel__has_callchain(evsel) &&
4083 evsel->core.attr.sample_max_stack == 0)
4084 evsel->core.attr.sample_max_stack = trace->max_stack;
4085 }
4086again:
4087 before = trace->nr_events;
4088
4089 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4090 union perf_event *event;
4091 struct mmap *md;
4092
4093 md = &evlist->mmap[i];
4094 if (perf_mmap__read_init(&md->core) < 0)
4095 continue;
4096
4097 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4098 ++trace->nr_events;
4099
4100 err = trace__deliver_event(trace, event);
4101 if (err)
4102 goto out_disable;
4103
4104 perf_mmap__consume(&md->core);
4105
4106 if (interrupted)
4107 goto out_disable;
4108
4109 if (done && !draining) {
4110 evlist__disable(evlist);
4111 draining = true;
4112 }
4113 }
4114 perf_mmap__read_done(&md->core);
4115 }
4116
4117 if (trace->nr_events == before) {
4118 int timeout = done ? 100 : -1;
4119
4120 if (!draining && evlist__poll(evlist, timeout) > 0) {
4121 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4122 draining = true;
4123
4124 goto again;
4125 } else {
4126 if (trace__flush_events(trace))
4127 goto out_disable;
4128 }
4129 } else {
4130 goto again;
4131 }
4132
4133out_disable:
4134 thread__zput(trace->current);
4135
4136 evlist__disable(evlist);
4137
4138 if (trace->sort_events)
4139 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4140
4141 if (!err) {
4142 if (trace->summary)
4143 trace__fprintf_thread_summary(trace, trace->output);
4144
4145 if (trace->show_tool_stats) {
4146 fprintf(trace->output, "Stats:\n "
4147 " vfs_getname : %" PRIu64 "\n"
4148 " proc_getname: %" PRIu64 "\n",
4149 trace->stats.vfs_getname,
4150 trace->stats.proc_getname);
4151 }
4152 }
4153
4154out_delete_evlist:
4155 trace__symbols__exit(trace);
4156 evlist__free_syscall_tp_fields(evlist);
4157 evlist__delete(evlist);
4158 cgroup__put(trace->cgroup);
4159 trace->evlist = NULL;
4160 trace->live = false;
4161 return err;
4162{
4163 char errbuf[BUFSIZ];
4164
4165out_error_sched_stat_runtime:
4166 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4167 goto out_error;
4168
4169out_error_raw_syscalls:
4170 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4171 goto out_error;
4172
4173out_error_mmap:
4174 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4175 goto out_error;
4176
4177out_error_open:
4178 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4179
4180out_error:
4181 fprintf(trace->output, "%s\n", errbuf);
4182 goto out_delete_evlist;
4183
4184out_error_apply_filters:
4185 fprintf(trace->output,
4186 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4187 evsel->filter, evsel__name(evsel), errno,
4188 str_error_r(errno, errbuf, sizeof(errbuf)));
4189 goto out_delete_evlist;
4190}
4191out_error_mem:
4192 fprintf(trace->output, "Not enough memory to run!\n");
4193 goto out_delete_evlist;
4194
4195out_errno:
4196 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4197 goto out_delete_evlist;
4198}
4199
4200static int trace__replay(struct trace *trace)
4201{
4202 const struct evsel_str_handler handlers[] = {
4203 { "probe:vfs_getname", trace__vfs_getname, },
4204 };
4205 struct perf_data data = {
4206 .path = input_name,
4207 .mode = PERF_DATA_MODE_READ,
4208 .force = trace->force,
4209 };
4210 struct perf_session *session;
4211 struct evsel *evsel;
4212 int err = -1;
4213
4214 trace->tool.sample = trace__process_sample;
4215 trace->tool.mmap = perf_event__process_mmap;
4216 trace->tool.mmap2 = perf_event__process_mmap2;
4217 trace->tool.comm = perf_event__process_comm;
4218 trace->tool.exit = perf_event__process_exit;
4219 trace->tool.fork = perf_event__process_fork;
4220 trace->tool.attr = perf_event__process_attr;
4221 trace->tool.tracing_data = perf_event__process_tracing_data;
4222 trace->tool.build_id = perf_event__process_build_id;
4223 trace->tool.namespaces = perf_event__process_namespaces;
4224
4225 trace->tool.ordered_events = true;
4226 trace->tool.ordering_requires_timestamps = true;
4227
4228
4229 trace->multiple_threads = true;
4230
4231 session = perf_session__new(&data, false, &trace->tool);
4232 if (IS_ERR(session))
4233 return PTR_ERR(session);
4234
4235 if (trace->opts.target.pid)
4236 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4237
4238 if (trace->opts.target.tid)
4239 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4240
4241 if (symbol__init(&session->header.env) < 0)
4242 goto out;
4243
4244 trace->host = &session->machines.host;
4245
4246 err = perf_session__set_tracepoints_handlers(session, handlers);
4247 if (err)
4248 goto out;
4249
4250 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter");
4251
4252 if (evsel == NULL)
4253 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter");
4254
4255 if (evsel &&
4256 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4257 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4258 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4259 goto out;
4260 }
4261
4262 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit");
4263 if (evsel == NULL)
4264 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit");
4265 if (evsel &&
4266 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4267 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4268 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4269 goto out;
4270 }
4271
4272 evlist__for_each_entry(session->evlist, evsel) {
4273 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4274 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4275 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4276 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4277 evsel->handler = trace__pgfault;
4278 }
4279
4280 setup_pager();
4281
4282 err = perf_session__process_events(session);
4283 if (err)
4284 pr_err("Failed to process events, error %d", err);
4285
4286 else if (trace->summary)
4287 trace__fprintf_thread_summary(trace, trace->output);
4288
4289out:
4290 perf_session__delete(session);
4291
4292 return err;
4293}
4294
4295static size_t trace__fprintf_threads_header(FILE *fp)
4296{
4297 size_t printed;
4298
4299 printed = fprintf(fp, "\n Summary of events:\n\n");
4300
4301 return printed;
4302}
4303
4304DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4305 struct syscall_stats *stats;
4306 double msecs;
4307 int syscall;
4308)
4309{
4310 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4311 struct syscall_stats *stats = source->priv;
4312
4313 entry->syscall = source->i;
4314 entry->stats = stats;
4315 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4316}
4317
4318static size_t thread__dump_stats(struct thread_trace *ttrace,
4319 struct trace *trace, FILE *fp)
4320{
4321 size_t printed = 0;
4322 struct syscall *sc;
4323 struct rb_node *nd;
4324 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4325
4326 if (syscall_stats == NULL)
4327 return 0;
4328
4329 printed += fprintf(fp, "\n");
4330
4331 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4332 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4333 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4334
4335 resort_rb__for_each_entry(nd, syscall_stats) {
4336 struct syscall_stats *stats = syscall_stats_entry->stats;
4337 if (stats) {
4338 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4339 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4340 double avg = avg_stats(&stats->stats);
4341 double pct;
4342 u64 n = (u64)stats->stats.n;
4343
4344 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4345 avg /= NSEC_PER_MSEC;
4346
4347 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4348 printed += fprintf(fp, " %-15s", sc->name);
4349 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4350 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4351 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4352
4353 if (trace->errno_summary && stats->nr_failures) {
4354 const char *arch_name = perf_env__arch(trace->host->env);
4355 int e;
4356
4357 for (e = 0; e < stats->max_errno; ++e) {
4358 if (stats->errnos[e] != 0)
4359 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4360 }
4361 }
4362 }
4363 }
4364
4365 resort_rb__delete(syscall_stats);
4366 printed += fprintf(fp, "\n\n");
4367
4368 return printed;
4369}
4370
4371static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4372{
4373 size_t printed = 0;
4374 struct thread_trace *ttrace = thread__priv(thread);
4375 double ratio;
4376
4377 if (ttrace == NULL)
4378 return 0;
4379
4380 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4381
4382 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4383 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4384 printed += fprintf(fp, "%.1f%%", ratio);
4385 if (ttrace->pfmaj)
4386 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4387 if (ttrace->pfmin)
4388 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4389 if (trace->sched)
4390 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4391 else if (fputc('\n', fp) != EOF)
4392 ++printed;
4393
4394 printed += thread__dump_stats(ttrace, trace, fp);
4395
4396 return printed;
4397}
4398
4399static unsigned long thread__nr_events(struct thread_trace *ttrace)
4400{
4401 return ttrace ? ttrace->nr_events : 0;
4402}
4403
4404DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4405 struct thread *thread;
4406)
4407{
4408 entry->thread = rb_entry(nd, struct thread, rb_node);
4409}
4410
4411static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4412{
4413 size_t printed = trace__fprintf_threads_header(fp);
4414 struct rb_node *nd;
4415 int i;
4416
4417 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4418 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4419
4420 if (threads == NULL) {
4421 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4422 return 0;
4423 }
4424
4425 resort_rb__for_each_entry(nd, threads)
4426 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4427
4428 resort_rb__delete(threads);
4429 }
4430 return printed;
4431}
4432
4433static int trace__set_duration(const struct option *opt, const char *str,
4434 int unset __maybe_unused)
4435{
4436 struct trace *trace = opt->value;
4437
4438 trace->duration_filter = atof(str);
4439 return 0;
4440}
4441
4442static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4443 int unset __maybe_unused)
4444{
4445 int ret = -1;
4446 size_t i;
4447 struct trace *trace = opt->value;
4448
4449
4450
4451
4452 struct intlist *list = intlist__new(str);
4453
4454 if (list == NULL)
4455 return -1;
4456
4457 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4458 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4459
4460 if (trace->filter_pids.entries == NULL)
4461 goto out;
4462
4463 trace->filter_pids.entries[0] = getpid();
4464
4465 for (i = 1; i < trace->filter_pids.nr; ++i)
4466 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4467
4468 intlist__delete(list);
4469 ret = 0;
4470out:
4471 return ret;
4472}
4473
4474static int trace__open_output(struct trace *trace, const char *filename)
4475{
4476 struct stat st;
4477
4478 if (!stat(filename, &st) && st.st_size) {
4479 char oldname[PATH_MAX];
4480
4481 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4482 unlink(oldname);
4483 rename(filename, oldname);
4484 }
4485
4486 trace->output = fopen(filename, "w");
4487
4488 return trace->output == NULL ? -errno : 0;
4489}
4490
4491static int parse_pagefaults(const struct option *opt, const char *str,
4492 int unset __maybe_unused)
4493{
4494 int *trace_pgfaults = opt->value;
4495
4496 if (strcmp(str, "all") == 0)
4497 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4498 else if (strcmp(str, "maj") == 0)
4499 *trace_pgfaults |= TRACE_PFMAJ;
4500 else if (strcmp(str, "min") == 0)
4501 *trace_pgfaults |= TRACE_PFMIN;
4502 else
4503 return -1;
4504
4505 return 0;
4506}
4507
4508static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4509{
4510 struct evsel *evsel;
4511
4512 evlist__for_each_entry(evlist, evsel) {
4513 if (evsel->handler == NULL)
4514 evsel->handler = handler;
4515 }
4516}
4517
4518static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4519{
4520 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4521
4522 if (fmt) {
4523 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4524
4525 if (scfmt) {
4526 int skip = 0;
4527
4528 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4529 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4530 ++skip;
4531
4532 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4533 }
4534 }
4535}
4536
4537static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4538{
4539 struct evsel *evsel;
4540
4541 evlist__for_each_entry(evlist, evsel) {
4542 if (evsel->priv || !evsel->tp_format)
4543 continue;
4544
4545 if (strcmp(evsel->tp_format->system, "syscalls")) {
4546 evsel__init_tp_arg_scnprintf(evsel);
4547 continue;
4548 }
4549
4550 if (evsel__init_syscall_tp(evsel))
4551 return -1;
4552
4553 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4554 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4555
4556 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4557 return -1;
4558
4559 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4560 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4561 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4562
4563 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4564 return -1;
4565
4566 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4567 }
4568 }
4569
4570 return 0;
4571}
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581static int trace__parse_events_option(const struct option *opt, const char *str,
4582 int unset __maybe_unused)
4583{
4584 struct trace *trace = (struct trace *)opt->value;
4585 const char *s = str;
4586 char *sep = NULL, *lists[2] = { NULL, NULL, };
4587 int len = strlen(str) + 1, err = -1, list, idx;
4588 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4589 char group_name[PATH_MAX];
4590 struct syscall_fmt *fmt;
4591
4592 if (strace_groups_dir == NULL)
4593 return -1;
4594
4595 if (*s == '!') {
4596 ++s;
4597 trace->not_ev_qualifier = true;
4598 }
4599
4600 while (1) {
4601 if ((sep = strchr(s, ',')) != NULL)
4602 *sep = '\0';
4603
4604 list = 0;
4605 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4606 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4607 list = 1;
4608 goto do_concat;
4609 }
4610
4611 fmt = syscall_fmt__find_by_alias(s);
4612 if (fmt != NULL) {
4613 list = 1;
4614 s = fmt->name;
4615 } else {
4616 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4617 if (access(group_name, R_OK) == 0)
4618 list = 1;
4619 }
4620do_concat:
4621 if (lists[list]) {
4622 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4623 } else {
4624 lists[list] = malloc(len);
4625 if (lists[list] == NULL)
4626 goto out;
4627 strcpy(lists[list], s);
4628 }
4629
4630 if (!sep)
4631 break;
4632
4633 *sep = ',';
4634 s = sep + 1;
4635 }
4636
4637 if (lists[1] != NULL) {
4638 struct strlist_config slist_config = {
4639 .dirname = strace_groups_dir,
4640 };
4641
4642 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4643 if (trace->ev_qualifier == NULL) {
4644 fputs("Not enough memory to parse event qualifier", trace->output);
4645 goto out;
4646 }
4647
4648 if (trace__validate_ev_qualifier(trace))
4649 goto out;
4650 trace->trace_syscalls = true;
4651 }
4652
4653 err = 0;
4654
4655 if (lists[0]) {
4656 struct option o = {
4657 .value = &trace->evlist,
4658 };
4659 err = parse_events_option(&o, lists[0], 0);
4660 }
4661out:
4662 free(strace_groups_dir);
4663 free(lists[0]);
4664 free(lists[1]);
4665 if (sep)
4666 *sep = ',';
4667
4668 return err;
4669}
4670
4671static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4672{
4673 struct trace *trace = opt->value;
4674
4675 if (!list_empty(&trace->evlist->core.entries)) {
4676 struct option o = {
4677 .value = &trace->evlist,
4678 };
4679 return parse_cgroups(&o, str, unset);
4680 }
4681 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4682
4683 return 0;
4684}
4685
4686static int trace__config(const char *var, const char *value, void *arg)
4687{
4688 struct trace *trace = arg;
4689 int err = 0;
4690
4691 if (!strcmp(var, "trace.add_events")) {
4692 trace->perfconfig_events = strdup(value);
4693 if (trace->perfconfig_events == NULL) {
4694 pr_err("Not enough memory for %s\n", "trace.add_events");
4695 return -1;
4696 }
4697 } else if (!strcmp(var, "trace.show_timestamp")) {
4698 trace->show_tstamp = perf_config_bool(var, value);
4699 } else if (!strcmp(var, "trace.show_duration")) {
4700 trace->show_duration = perf_config_bool(var, value);
4701 } else if (!strcmp(var, "trace.show_arg_names")) {
4702 trace->show_arg_names = perf_config_bool(var, value);
4703 if (!trace->show_arg_names)
4704 trace->show_zeros = true;
4705 } else if (!strcmp(var, "trace.show_zeros")) {
4706 bool new_show_zeros = perf_config_bool(var, value);
4707 if (!trace->show_arg_names && !new_show_zeros) {
4708 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4709 goto out;
4710 }
4711 trace->show_zeros = new_show_zeros;
4712 } else if (!strcmp(var, "trace.show_prefix")) {
4713 trace->show_string_prefix = perf_config_bool(var, value);
4714 } else if (!strcmp(var, "trace.no_inherit")) {
4715 trace->opts.no_inherit = perf_config_bool(var, value);
4716 } else if (!strcmp(var, "trace.args_alignment")) {
4717 int args_alignment = 0;
4718 if (perf_config_int(&args_alignment, var, value) == 0)
4719 trace->args_alignment = args_alignment;
4720 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4721 if (strcasecmp(value, "libtraceevent") == 0)
4722 trace->libtraceevent_print = true;
4723 else if (strcasecmp(value, "libbeauty") == 0)
4724 trace->libtraceevent_print = false;
4725 }
4726out:
4727 return err;
4728}
4729
4730static void trace__exit(struct trace *trace)
4731{
4732 int i;
4733
4734 strlist__delete(trace->ev_qualifier);
4735 free(trace->ev_qualifier_ids.entries);
4736 if (trace->syscalls.table) {
4737 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
4738 syscall__exit(&trace->syscalls.table[i]);
4739 free(trace->syscalls.table);
4740 }
4741 syscalltbl__delete(trace->sctbl);
4742 zfree(&trace->perfconfig_events);
4743}
4744
4745int cmd_trace(int argc, const char **argv)
4746{
4747 const char *trace_usage[] = {
4748 "perf trace [<options>] [<command>]",
4749 "perf trace [<options>] -- <command> [<options>]",
4750 "perf trace record [<options>] [<command>]",
4751 "perf trace record [<options>] -- <command> [<options>]",
4752 NULL
4753 };
4754 struct trace trace = {
4755 .opts = {
4756 .target = {
4757 .uid = UINT_MAX,
4758 .uses_mmap = true,
4759 },
4760 .user_freq = UINT_MAX,
4761 .user_interval = ULLONG_MAX,
4762 .no_buffering = true,
4763 .mmap_pages = UINT_MAX,
4764 },
4765 .output = stderr,
4766 .show_comm = true,
4767 .show_tstamp = true,
4768 .show_duration = true,
4769 .show_arg_names = true,
4770 .args_alignment = 70,
4771 .trace_syscalls = false,
4772 .kernel_syscallchains = false,
4773 .max_stack = UINT_MAX,
4774 .max_events = ULONG_MAX,
4775 };
4776 const char *map_dump_str = NULL;
4777 const char *output_name = NULL;
4778 const struct option trace_options[] = {
4779 OPT_CALLBACK('e', "event", &trace, "event",
4780 "event/syscall selector. use 'perf list' to list available events",
4781 trace__parse_events_option),
4782 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4783 "event filter", parse_filter),
4784 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4785 "show the thread COMM next to its id"),
4786 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4787 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4788 trace__parse_events_option),
4789 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4790 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4791 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4792 "trace events on existing process id"),
4793 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4794 "trace events on existing thread id"),
4795 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4796 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4797 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4798 "system-wide collection from all CPUs"),
4799 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4800 "list of cpus to monitor"),
4801 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4802 "child tasks do not inherit counters"),
4803 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4804 "number of mmap data pages", evlist__parse_mmap_pages),
4805 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4806 "user to profile"),
4807 OPT_CALLBACK(0, "duration", &trace, "float",
4808 "show only events with duration > N.M ms",
4809 trace__set_duration),
4810#ifdef HAVE_LIBBPF_SUPPORT
4811 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4812#endif
4813 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4814 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4815 OPT_BOOLEAN('T', "time", &trace.full_time,
4816 "Show full timestamp, not time relative to first start"),
4817 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4818 "Show only syscalls that failed"),
4819 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4820 "Show only syscall summary with statistics"),
4821 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4822 "Show all syscalls and summary with statistics"),
4823 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4824 "Show errno stats per syscall, use with -s or -S"),
4825 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4826 "Trace pagefaults", parse_pagefaults, "maj"),
4827 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4828 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4829 OPT_CALLBACK(0, "call-graph", &trace.opts,
4830 "record_mode[,record_size]", record_callchain_help,
4831 &record_parse_callchain_opt),
4832 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4833 "Use libtraceevent to print the tracepoint arguments."),
4834 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4835 "Show the kernel callchains on the syscall exit path"),
4836 OPT_ULONG(0, "max-events", &trace.max_events,
4837 "Set the maximum number of events to print, exit after that is reached. "),
4838 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4839 "Set the minimum stack depth when parsing the callchain, "
4840 "anything below the specified depth will be ignored."),
4841 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4842 "Set the maximum stack depth when parsing the callchain, "
4843 "anything beyond the specified depth will be ignored. "
4844 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4845 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4846 "Sort batch of events before processing, use if getting out of order events"),
4847 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4848 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4849 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4850 "per thread proc mmap processing timeout in ms"),
4851 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4852 trace__parse_cgroups),
4853 OPT_INTEGER('D', "delay", &trace.opts.initial_delay,
4854 "ms to wait before starting measurement after program "
4855 "start"),
4856 OPTS_EVSWITCH(&trace.evswitch),
4857 OPT_END()
4858 };
4859 bool __maybe_unused max_stack_user_set = true;
4860 bool mmap_pages_user_set = true;
4861 struct evsel *evsel;
4862 const char * const trace_subcommands[] = { "record", NULL };
4863 int err = -1;
4864 char bf[BUFSIZ];
4865
4866 signal(SIGSEGV, sighandler_dump_stack);
4867 signal(SIGFPE, sighandler_dump_stack);
4868 signal(SIGCHLD, sig_handler);
4869 signal(SIGINT, sig_handler);
4870
4871 trace.evlist = evlist__new();
4872 trace.sctbl = syscalltbl__new();
4873
4874 if (trace.evlist == NULL || trace.sctbl == NULL) {
4875 pr_err("Not enough memory to run!\n");
4876 err = -ENOMEM;
4877 goto out;
4878 }
4879
4880
4881
4882
4883
4884
4885
4886
4887 rlimit__bump_memlock();
4888
4889 err = perf_config(trace__config, &trace);
4890 if (err)
4891 goto out;
4892
4893 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4894 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4908 trace.evlist->core.nr_entries == 0 ) {
4909 trace.trace_syscalls = true;
4910 }
4911
4912
4913
4914
4915
4916
4917 if (trace.perfconfig_events != NULL) {
4918 struct parse_events_error parse_err;
4919
4920 bzero(&parse_err, sizeof(parse_err));
4921 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4922 if (err) {
4923 parse_events_print_error(&parse_err, trace.perfconfig_events);
4924 goto out;
4925 }
4926 }
4927
4928 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4929 usage_with_options_msg(trace_usage, trace_options,
4930 "cgroup monitoring only available in system-wide mode");
4931 }
4932
4933 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4934 if (IS_ERR(evsel)) {
4935 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4936 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4937 goto out;
4938 }
4939
4940 if (evsel) {
4941 trace.syscalls.events.augmented = evsel;
4942
4943 evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4944 if (evsel == NULL) {
4945 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4946 goto out;
4947 }
4948
4949 if (evsel->bpf_obj == NULL) {
4950 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4951 goto out;
4952 }
4953
4954 trace.bpf_obj = evsel->bpf_obj;
4955
4956
4957
4958
4959
4960
4961 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4962 trace.trace_syscalls = true;
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988 if (!trace.trace_syscalls) {
4989 trace__delete_augmented_syscalls(&trace);
4990 } else {
4991 trace__set_bpf_map_filtered_pids(&trace);
4992 trace__set_bpf_map_syscalls(&trace);
4993 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4994 }
4995 }
4996
4997 err = bpf__setup_stdout(trace.evlist);
4998 if (err) {
4999 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
5000 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
5001 goto out;
5002 }
5003
5004 err = -1;
5005
5006 if (map_dump_str) {
5007 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
5008 if (trace.dump.map == NULL) {
5009 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
5010 goto out;
5011 }
5012 }
5013
5014 if (trace.trace_pgfaults) {
5015 trace.opts.sample_address = true;
5016 trace.opts.sample_time = true;
5017 }
5018
5019 if (trace.opts.mmap_pages == UINT_MAX)
5020 mmap_pages_user_set = false;
5021
5022 if (trace.max_stack == UINT_MAX) {
5023 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
5024 max_stack_user_set = false;
5025 }
5026
5027#ifdef HAVE_DWARF_UNWIND_SUPPORT
5028 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
5029 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
5030 }
5031#endif
5032
5033 if (callchain_param.enabled) {
5034 if (!mmap_pages_user_set && geteuid() == 0)
5035 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
5036
5037 symbol_conf.use_callchain = true;
5038 }
5039
5040 if (trace.evlist->core.nr_entries > 0) {
5041 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
5042 if (evlist__set_syscall_tp_fields(trace.evlist)) {
5043 perror("failed to set syscalls:* tracepoint fields");
5044 goto out;
5045 }
5046 }
5047
5048 if (trace.sort_events) {
5049 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
5050 ordered_events__set_copy_on_queue(&trace.oe.data, true);
5051 }
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064 if (trace.syscalls.events.augmented) {
5065 evlist__for_each_entry(trace.evlist, evsel) {
5066 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
5067
5068 if (raw_syscalls_sys_exit) {
5069 trace.raw_augmented_syscalls = true;
5070 goto init_augmented_syscall_tp;
5071 }
5072
5073 if (trace.syscalls.events.augmented->priv == NULL &&
5074 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5075 struct evsel *augmented = trace.syscalls.events.augmented;
5076 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5077 evsel__init_augmented_syscall_tp_args(augmented))
5078 goto out;
5079
5080
5081
5082
5083
5084 augmented->handler = trace__sys_enter;
5085
5086
5087
5088
5089
5090
5091 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5092 evsel__init_augmented_syscall_tp_args(evsel))
5093 goto out;
5094 evsel->handler = trace__sys_enter;
5095 }
5096
5097 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5098 struct syscall_tp *sc;
5099init_augmented_syscall_tp:
5100 if (evsel__init_augmented_syscall_tp(evsel, evsel))
5101 goto out;
5102 sc = __evsel__syscall_tp(evsel);
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122 if (trace.raw_augmented_syscalls)
5123 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5124 evsel__init_augmented_syscall_tp_ret(evsel);
5125 evsel->handler = trace__sys_exit;
5126 }
5127 }
5128 }
5129
5130 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5131 return trace__record(&trace, argc-1, &argv[1]);
5132
5133
5134 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5135 trace.summary_only = true;
5136
5137
5138 if (trace.summary_only)
5139 trace.summary = trace.summary_only;
5140
5141 if (output_name != NULL) {
5142 err = trace__open_output(&trace, output_name);
5143 if (err < 0) {
5144 perror("failed to create output file");
5145 goto out;
5146 }
5147 }
5148
5149 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5150 if (err)
5151 goto out_close;
5152
5153 err = target__validate(&trace.opts.target);
5154 if (err) {
5155 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5156 fprintf(trace.output, "%s", bf);
5157 goto out_close;
5158 }
5159
5160 err = target__parse_uid(&trace.opts.target);
5161 if (err) {
5162 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5163 fprintf(trace.output, "%s", bf);
5164 goto out_close;
5165 }
5166
5167 if (!argc && target__none(&trace.opts.target))
5168 trace.opts.target.system_wide = true;
5169
5170 if (input_name)
5171 err = trace__replay(&trace);
5172 else
5173 err = trace__run(&trace, argc, argv);
5174
5175out_close:
5176 if (output_name != NULL)
5177 fclose(trace.output);
5178out:
5179 trace__exit(&trace);
5180 return err;
5181}
5182