Loading...
Note: File does not exist in v3.5.6.
1/*
2 * builtin-trace.c
3 *
4 * Builtin 'trace' command:
5 *
6 * Display a continuously updated trace of any workload, CPU, specific PID,
7 * system wide, etc. Default format is loosely strace like, but any other
8 * event may be specified using --event.
9 *
10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 *
12 * Initially based on the 'trace' prototype by Thomas Gleixner:
13 *
14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
15 */
16
17#include "util/record.h"
18#include <api/fs/tracing_path.h>
19#ifdef HAVE_LIBBPF_SUPPORT
20#include <bpf/bpf.h>
21#include <bpf/libbpf.h>
22#include <bpf/btf.h>
23#ifdef HAVE_BPF_SKEL
24#include "bpf_skel/augmented_raw_syscalls.skel.h"
25#endif
26#endif
27#include "util/bpf_map.h"
28#include "util/rlimit.h"
29#include "builtin.h"
30#include "util/cgroup.h"
31#include "util/color.h"
32#include "util/config.h"
33#include "util/debug.h"
34#include "util/dso.h"
35#include "util/env.h"
36#include "util/event.h"
37#include "util/evsel.h"
38#include "util/evsel_fprintf.h"
39#include "util/synthetic-events.h"
40#include "util/evlist.h"
41#include "util/evswitch.h"
42#include "util/mmap.h"
43#include <subcmd/pager.h>
44#include <subcmd/exec-cmd.h>
45#include "util/machine.h"
46#include "util/map.h"
47#include "util/symbol.h"
48#include "util/path.h"
49#include "util/session.h"
50#include "util/thread.h"
51#include <subcmd/parse-options.h>
52#include "util/strlist.h"
53#include "util/intlist.h"
54#include "util/thread_map.h"
55#include "util/stat.h"
56#include "util/tool.h"
57#include "util/util.h"
58#include "trace/beauty/beauty.h"
59#include "trace-event.h"
60#include "util/parse-events.h"
61#include "util/tracepoint.h"
62#include "callchain.h"
63#include "print_binary.h"
64#include "string2.h"
65#include "syscalltbl.h"
66#include "rb_resort.h"
67#include "../perf.h"
68#include "trace_augment.h"
69
70#include <errno.h>
71#include <inttypes.h>
72#include <poll.h>
73#include <signal.h>
74#include <stdlib.h>
75#include <string.h>
76#include <linux/err.h>
77#include <linux/filter.h>
78#include <linux/kernel.h>
79#include <linux/list_sort.h>
80#include <linux/random.h>
81#include <linux/stringify.h>
82#include <linux/time64.h>
83#include <linux/zalloc.h>
84#include <fcntl.h>
85#include <sys/sysmacros.h>
86
87#include <linux/ctype.h>
88#include <perf/mmap.h>
89
90#ifdef HAVE_LIBTRACEEVENT
91#include <event-parse.h>
92#endif
93
94#ifndef O_CLOEXEC
95# define O_CLOEXEC 02000000
96#endif
97
98#ifndef F_LINUX_SPECIFIC_BASE
99# define F_LINUX_SPECIFIC_BASE 1024
100#endif
101
102#define RAW_SYSCALL_ARGS_NUM 6
103
104/*
105 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
106 *
107 * We have to explicitely mark the direction of the flow of data, if from the
108 * kernel to user space or the other way around, since the BPF collector we
109 * have so far copies only from user to kernel space, mark the arguments that
110 * go that direction, so that we don´t end up collecting the previous contents
111 * for syscall args that goes from kernel to user space.
112 */
113struct syscall_arg_fmt {
114 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
115 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
116 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
117 void *parm;
118 const char *name;
119 u16 nr_entries; // for arrays
120 bool from_user;
121 bool show_zero;
122#ifdef HAVE_LIBBPF_SUPPORT
123 const struct btf_type *type;
124 int type_id; /* used in btf_dump */
125#endif
126};
127
128struct syscall_fmt {
129 const char *name;
130 const char *alias;
131 struct {
132 const char *sys_enter,
133 *sys_exit;
134 } bpf_prog_name;
135 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM];
136 u8 nr_args;
137 bool errpid;
138 bool timeout;
139 bool hexret;
140};
141
142struct trace {
143 struct perf_tool tool;
144 struct syscalltbl *sctbl;
145 struct {
146 struct syscall *table;
147 struct {
148 struct evsel *sys_enter,
149 *sys_exit,
150 *bpf_output;
151 } events;
152 } syscalls;
153#ifdef HAVE_BPF_SKEL
154 struct augmented_raw_syscalls_bpf *skel;
155#endif
156#ifdef HAVE_LIBBPF_SUPPORT
157 struct btf *btf;
158#endif
159 struct record_opts opts;
160 struct evlist *evlist;
161 struct machine *host;
162 struct thread *current;
163 struct cgroup *cgroup;
164 u64 base_time;
165 FILE *output;
166 unsigned long nr_events;
167 unsigned long nr_events_printed;
168 unsigned long max_events;
169 struct evswitch evswitch;
170 struct strlist *ev_qualifier;
171 struct {
172 size_t nr;
173 int *entries;
174 } ev_qualifier_ids;
175 struct {
176 size_t nr;
177 pid_t *entries;
178 struct bpf_map *map;
179 } filter_pids;
180 double duration_filter;
181 double runtime_ms;
182 struct {
183 u64 vfs_getname,
184 proc_getname;
185 } stats;
186 unsigned int max_stack;
187 unsigned int min_stack;
188 int raw_augmented_syscalls_args_size;
189 bool raw_augmented_syscalls;
190 bool fd_path_disabled;
191 bool sort_events;
192 bool not_ev_qualifier;
193 bool live;
194 bool full_time;
195 bool sched;
196 bool multiple_threads;
197 bool summary;
198 bool summary_only;
199 bool errno_summary;
200 bool failure_only;
201 bool show_comm;
202 bool print_sample;
203 bool show_tool_stats;
204 bool trace_syscalls;
205 bool libtraceevent_print;
206 bool kernel_syscallchains;
207 s16 args_alignment;
208 bool show_tstamp;
209 bool show_duration;
210 bool show_zeros;
211 bool show_arg_names;
212 bool show_string_prefix;
213 bool force;
214 bool vfs_getname;
215 bool force_btf;
216 int trace_pgfaults;
217 char *perfconfig_events;
218 struct {
219 struct ordered_events data;
220 u64 last;
221 } oe;
222};
223
224static void trace__load_vmlinux_btf(struct trace *trace __maybe_unused)
225{
226#ifdef HAVE_LIBBPF_SUPPORT
227 if (trace->btf != NULL)
228 return;
229
230 trace->btf = btf__load_vmlinux_btf();
231 if (verbose > 0) {
232 fprintf(trace->output, trace->btf ? "vmlinux BTF loaded\n" :
233 "Failed to load vmlinux BTF\n");
234 }
235#endif
236}
237
238struct tp_field {
239 int offset;
240 union {
241 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
242 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
243 };
244};
245
246#define TP_UINT_FIELD(bits) \
247static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
248{ \
249 u##bits value; \
250 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
251 return value; \
252}
253
254TP_UINT_FIELD(8);
255TP_UINT_FIELD(16);
256TP_UINT_FIELD(32);
257TP_UINT_FIELD(64);
258
259#define TP_UINT_FIELD__SWAPPED(bits) \
260static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
261{ \
262 u##bits value; \
263 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
264 return bswap_##bits(value);\
265}
266
267TP_UINT_FIELD__SWAPPED(16);
268TP_UINT_FIELD__SWAPPED(32);
269TP_UINT_FIELD__SWAPPED(64);
270
271static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
272{
273 field->offset = offset;
274
275 switch (size) {
276 case 1:
277 field->integer = tp_field__u8;
278 break;
279 case 2:
280 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
281 break;
282 case 4:
283 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
284 break;
285 case 8:
286 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
287 break;
288 default:
289 return -1;
290 }
291
292 return 0;
293}
294
295static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
296{
297 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
298}
299
300static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
301{
302 return sample->raw_data + field->offset;
303}
304
305static int __tp_field__init_ptr(struct tp_field *field, int offset)
306{
307 field->offset = offset;
308 field->pointer = tp_field__ptr;
309 return 0;
310}
311
312static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
313{
314 return __tp_field__init_ptr(field, format_field->offset);
315}
316
317struct syscall_tp {
318 struct tp_field id;
319 union {
320 struct tp_field args, ret;
321 };
322};
323
324/*
325 * The evsel->priv as used by 'perf trace'
326 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
327 * fmt: for all the other tracepoints
328 */
329struct evsel_trace {
330 struct syscall_tp sc;
331 struct syscall_arg_fmt *fmt;
332};
333
334static struct evsel_trace *evsel_trace__new(void)
335{
336 return zalloc(sizeof(struct evsel_trace));
337}
338
339static void evsel_trace__delete(struct evsel_trace *et)
340{
341 if (et == NULL)
342 return;
343
344 zfree(&et->fmt);
345 free(et);
346}
347
348/*
349 * Used with raw_syscalls:sys_{enter,exit} and with the
350 * syscalls:sys_{enter,exit}_SYSCALL tracepoints
351 */
352static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
353{
354 struct evsel_trace *et = evsel->priv;
355
356 return &et->sc;
357}
358
359static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
360{
361 if (evsel->priv == NULL) {
362 evsel->priv = evsel_trace__new();
363 if (evsel->priv == NULL)
364 return NULL;
365 }
366
367 return __evsel__syscall_tp(evsel);
368}
369
370/*
371 * Used with all the other tracepoints.
372 */
373static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
374{
375 struct evsel_trace *et = evsel->priv;
376
377 return et->fmt;
378}
379
380static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
381{
382 struct evsel_trace *et = evsel->priv;
383
384 if (evsel->priv == NULL) {
385 et = evsel->priv = evsel_trace__new();
386
387 if (et == NULL)
388 return NULL;
389 }
390
391 if (et->fmt == NULL) {
392 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
393 if (et->fmt == NULL)
394 goto out_delete;
395 }
396
397 return __evsel__syscall_arg_fmt(evsel);
398
399out_delete:
400 evsel_trace__delete(evsel->priv);
401 evsel->priv = NULL;
402 return NULL;
403}
404
405static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
406{
407 struct tep_format_field *format_field = evsel__field(evsel, name);
408
409 if (format_field == NULL)
410 return -1;
411
412 return tp_field__init_uint(field, format_field, evsel->needs_swap);
413}
414
415#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
416 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
417 evsel__init_tp_uint_field(evsel, &sc->name, #name); })
418
419static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
420{
421 struct tep_format_field *format_field = evsel__field(evsel, name);
422
423 if (format_field == NULL)
424 return -1;
425
426 return tp_field__init_ptr(field, format_field);
427}
428
429#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
430 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
431 evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
432
433static void evsel__delete_priv(struct evsel *evsel)
434{
435 zfree(&evsel->priv);
436 evsel__delete(evsel);
437}
438
439static int evsel__init_syscall_tp(struct evsel *evsel)
440{
441 struct syscall_tp *sc = evsel__syscall_tp(evsel);
442
443 if (sc != NULL) {
444 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
445 evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
446 return -ENOENT;
447
448 return 0;
449 }
450
451 return -ENOMEM;
452}
453
454static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
455{
456 struct syscall_tp *sc = evsel__syscall_tp(evsel);
457
458 if (sc != NULL) {
459 struct tep_format_field *syscall_id = evsel__field(tp, "id");
460 if (syscall_id == NULL)
461 syscall_id = evsel__field(tp, "__syscall_nr");
462 if (syscall_id == NULL ||
463 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
464 return -EINVAL;
465
466 return 0;
467 }
468
469 return -ENOMEM;
470}
471
472static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
473{
474 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
475
476 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
477}
478
479static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
480{
481 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
482
483 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
484}
485
486static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
487{
488 if (evsel__syscall_tp(evsel) != NULL) {
489 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
490 return -ENOENT;
491
492 evsel->handler = handler;
493 return 0;
494 }
495
496 return -ENOMEM;
497}
498
499static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
500{
501 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
502
503 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
504 if (IS_ERR(evsel))
505 evsel = evsel__newtp("syscalls", direction);
506
507 if (IS_ERR(evsel))
508 return NULL;
509
510 if (evsel__init_raw_syscall_tp(evsel, handler))
511 goto out_delete;
512
513 return evsel;
514
515out_delete:
516 evsel__delete_priv(evsel);
517 return NULL;
518}
519
520#define perf_evsel__sc_tp_uint(evsel, name, sample) \
521 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
522 fields->name.integer(&fields->name, sample); })
523
524#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
525 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
526 fields->name.pointer(&fields->name, sample); })
527
528size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
529{
530 int idx = val - sa->offset;
531
532 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
533 size_t printed = scnprintf(bf, size, intfmt, val);
534 if (show_suffix)
535 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
536 return printed;
537 }
538
539 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
540}
541
542size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
543{
544 int idx = val - sa->offset;
545
546 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
547 size_t printed = scnprintf(bf, size, intfmt, val);
548 if (show_prefix)
549 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
550 return printed;
551 }
552
553 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
554}
555
556static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
557 const char *intfmt,
558 struct syscall_arg *arg)
559{
560 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
561}
562
563static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
564 struct syscall_arg *arg)
565{
566 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
567}
568
569#define SCA_STRARRAY syscall_arg__scnprintf_strarray
570
571bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
572{
573 return strarray__strtoul(arg->parm, bf, size, ret);
574}
575
576bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
577{
578 return strarray__strtoul_flags(arg->parm, bf, size, ret);
579}
580
581bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
582{
583 return strarrays__strtoul(arg->parm, bf, size, ret);
584}
585
586size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
587{
588 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
589}
590
591size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
592{
593 size_t printed;
594 int i;
595
596 for (i = 0; i < sas->nr_entries; ++i) {
597 struct strarray *sa = sas->entries[i];
598 int idx = val - sa->offset;
599
600 if (idx >= 0 && idx < sa->nr_entries) {
601 if (sa->entries[idx] == NULL)
602 break;
603 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
604 }
605 }
606
607 printed = scnprintf(bf, size, intfmt, val);
608 if (show_prefix)
609 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
610 return printed;
611}
612
613bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
614{
615 int i;
616
617 for (i = 0; i < sa->nr_entries; ++i) {
618 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
619 *ret = sa->offset + i;
620 return true;
621 }
622 }
623
624 return false;
625}
626
627bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
628{
629 u64 val = 0;
630 char *tok = bf, *sep, *end;
631
632 *ret = 0;
633
634 while (size != 0) {
635 int toklen = size;
636
637 sep = memchr(tok, '|', size);
638 if (sep != NULL) {
639 size -= sep - tok + 1;
640
641 end = sep - 1;
642 while (end > tok && isspace(*end))
643 --end;
644
645 toklen = end - tok + 1;
646 }
647
648 while (isspace(*tok))
649 ++tok;
650
651 if (isalpha(*tok) || *tok == '_') {
652 if (!strarray__strtoul(sa, tok, toklen, &val))
653 return false;
654 } else
655 val = strtoul(tok, NULL, 0);
656
657 *ret |= (1 << (val - 1));
658
659 if (sep == NULL)
660 break;
661 tok = sep + 1;
662 }
663
664 return true;
665}
666
667bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
668{
669 int i;
670
671 for (i = 0; i < sas->nr_entries; ++i) {
672 struct strarray *sa = sas->entries[i];
673
674 if (strarray__strtoul(sa, bf, size, ret))
675 return true;
676 }
677
678 return false;
679}
680
681size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
682 struct syscall_arg *arg)
683{
684 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
685}
686
687#ifndef AT_FDCWD
688#define AT_FDCWD -100
689#endif
690
691static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
692 struct syscall_arg *arg)
693{
694 int fd = arg->val;
695 const char *prefix = "AT_FD";
696
697 if (fd == AT_FDCWD)
698 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
699
700 return syscall_arg__scnprintf_fd(bf, size, arg);
701}
702
703#define SCA_FDAT syscall_arg__scnprintf_fd_at
704
705static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
706 struct syscall_arg *arg);
707
708#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
709
710size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
711{
712 return scnprintf(bf, size, "%#lx", arg->val);
713}
714
715size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
716{
717 if (arg->val == 0)
718 return scnprintf(bf, size, "NULL");
719 return syscall_arg__scnprintf_hex(bf, size, arg);
720}
721
722size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
723{
724 return scnprintf(bf, size, "%d", arg->val);
725}
726
727size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
728{
729 return scnprintf(bf, size, "%ld", arg->val);
730}
731
732static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
733{
734 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
735 // fill missing comms using thread__set_comm()...
736 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
737 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
738}
739
740#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
741
742static const char *bpf_cmd[] = {
743 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
744 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH",
745 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID",
746 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD",
747 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID",
748 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE",
749 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH",
750 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE",
751 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE",
752 "LINK_DETACH", "PROG_BIND_MAP",
753};
754static DEFINE_STRARRAY(bpf_cmd, "BPF_");
755
756static const char *fsmount_flags[] = {
757 [1] = "CLOEXEC",
758};
759static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
760
761#include "trace/beauty/generated/fsconfig_arrays.c"
762
763static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
764
765static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
766static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
767
768static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
769static DEFINE_STRARRAY(itimers, "ITIMER_");
770
771static const char *keyctl_options[] = {
772 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
773 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
774 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
775 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
776 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
777};
778static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
779
780static const char *whences[] = { "SET", "CUR", "END",
781#ifdef SEEK_DATA
782"DATA",
783#endif
784#ifdef SEEK_HOLE
785"HOLE",
786#endif
787};
788static DEFINE_STRARRAY(whences, "SEEK_");
789
790static const char *fcntl_cmds[] = {
791 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
792 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
793 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
794 "GETOWNER_UIDS",
795};
796static DEFINE_STRARRAY(fcntl_cmds, "F_");
797
798static const char *fcntl_linux_specific_cmds[] = {
799 "SETLEASE", "GETLEASE", "NOTIFY", "DUPFD_QUERY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
800 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
801 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
802};
803
804static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
805
806static struct strarray *fcntl_cmds_arrays[] = {
807 &strarray__fcntl_cmds,
808 &strarray__fcntl_linux_specific_cmds,
809};
810
811static DEFINE_STRARRAYS(fcntl_cmds_arrays);
812
813static const char *rlimit_resources[] = {
814 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
815 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
816 "RTTIME",
817};
818static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
819
820static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
821static DEFINE_STRARRAY(sighow, "SIG_");
822
823static const char *clockid[] = {
824 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
825 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
826 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
827};
828static DEFINE_STRARRAY(clockid, "CLOCK_");
829
830static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
831 struct syscall_arg *arg)
832{
833 bool show_prefix = arg->show_string_prefix;
834 const char *suffix = "_OK";
835 size_t printed = 0;
836 int mode = arg->val;
837
838 if (mode == F_OK) /* 0 */
839 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
840#define P_MODE(n) \
841 if (mode & n##_OK) { \
842 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
843 mode &= ~n##_OK; \
844 }
845
846 P_MODE(R);
847 P_MODE(W);
848 P_MODE(X);
849#undef P_MODE
850
851 if (mode)
852 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
853
854 return printed;
855}
856
857#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
858
859static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
860 struct syscall_arg *arg);
861
862#define SCA_FILENAME syscall_arg__scnprintf_filename
863
864// 'argname' is just documentational at this point, to remove the previous comment with that info
865#define SCA_FILENAME_FROM_USER(argname) \
866 { .scnprintf = SCA_FILENAME, \
867 .from_user = true, }
868
869static size_t syscall_arg__scnprintf_buf(char *bf, size_t size, struct syscall_arg *arg);
870
871#define SCA_BUF syscall_arg__scnprintf_buf
872
873static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
874 struct syscall_arg *arg)
875{
876 bool show_prefix = arg->show_string_prefix;
877 const char *prefix = "O_";
878 int printed = 0, flags = arg->val;
879
880#define P_FLAG(n) \
881 if (flags & O_##n) { \
882 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
883 flags &= ~O_##n; \
884 }
885
886 P_FLAG(CLOEXEC);
887 P_FLAG(NONBLOCK);
888#undef P_FLAG
889
890 if (flags)
891 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
892
893 return printed;
894}
895
896#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
897
898#ifndef GRND_NONBLOCK
899#define GRND_NONBLOCK 0x0001
900#endif
901#ifndef GRND_RANDOM
902#define GRND_RANDOM 0x0002
903#endif
904
905static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
906 struct syscall_arg *arg)
907{
908 bool show_prefix = arg->show_string_prefix;
909 const char *prefix = "GRND_";
910 int printed = 0, flags = arg->val;
911
912#define P_FLAG(n) \
913 if (flags & GRND_##n) { \
914 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
915 flags &= ~GRND_##n; \
916 }
917
918 P_FLAG(RANDOM);
919 P_FLAG(NONBLOCK);
920#undef P_FLAG
921
922 if (flags)
923 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
924
925 return printed;
926}
927
928#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
929
930#ifdef HAVE_LIBBPF_SUPPORT
931static void syscall_arg_fmt__cache_btf_enum(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type)
932{
933 int id;
934
935 type = strstr(type, "enum ");
936 if (type == NULL)
937 return;
938
939 type += 5; // skip "enum " to get the enumeration name
940
941 id = btf__find_by_name(btf, type);
942 if (id < 0)
943 return;
944
945 arg_fmt->type = btf__type_by_id(btf, id);
946}
947
948static bool syscall_arg__strtoul_btf_enum(char *bf, size_t size, struct syscall_arg *arg, u64 *val)
949{
950 const struct btf_type *bt = arg->fmt->type;
951 struct btf *btf = arg->trace->btf;
952 struct btf_enum *be = btf_enum(bt);
953
954 for (int i = 0; i < btf_vlen(bt); ++i, ++be) {
955 const char *name = btf__name_by_offset(btf, be->name_off);
956 int max_len = max(size, strlen(name));
957
958 if (strncmp(name, bf, max_len) == 0) {
959 *val = be->val;
960 return true;
961 }
962 }
963
964 return false;
965}
966
967static bool syscall_arg__strtoul_btf_type(char *bf, size_t size, struct syscall_arg *arg, u64 *val)
968{
969 const struct btf_type *bt;
970 char *type = arg->type_name;
971 struct btf *btf;
972
973 trace__load_vmlinux_btf(arg->trace);
974
975 btf = arg->trace->btf;
976 if (btf == NULL)
977 return false;
978
979 if (arg->fmt->type == NULL) {
980 // See if this is an enum
981 syscall_arg_fmt__cache_btf_enum(arg->fmt, btf, type);
982 }
983
984 // Now let's see if we have a BTF type resolved
985 bt = arg->fmt->type;
986 if (bt == NULL)
987 return false;
988
989 // If it is an enum:
990 if (btf_is_enum(arg->fmt->type))
991 return syscall_arg__strtoul_btf_enum(bf, size, arg, val);
992
993 return false;
994}
995
996static size_t btf_enum_scnprintf(const struct btf_type *type, struct btf *btf, char *bf, size_t size, int val)
997{
998 struct btf_enum *be = btf_enum(type);
999 const int nr_entries = btf_vlen(type);
1000
1001 for (int i = 0; i < nr_entries; ++i, ++be) {
1002 if (be->val == val) {
1003 return scnprintf(bf, size, "%s",
1004 btf__name_by_offset(btf, be->name_off));
1005 }
1006 }
1007
1008 return 0;
1009}
1010
1011struct trace_btf_dump_snprintf_ctx {
1012 char *bf;
1013 size_t printed, size;
1014};
1015
1016static void trace__btf_dump_snprintf(void *vctx, const char *fmt, va_list args)
1017{
1018 struct trace_btf_dump_snprintf_ctx *ctx = vctx;
1019
1020 ctx->printed += vscnprintf(ctx->bf + ctx->printed, ctx->size - ctx->printed, fmt, args);
1021}
1022
1023static size_t btf_struct_scnprintf(const struct btf_type *type, struct btf *btf, char *bf, size_t size, struct syscall_arg *arg)
1024{
1025 struct trace_btf_dump_snprintf_ctx ctx = {
1026 .bf = bf,
1027 .size = size,
1028 };
1029 struct augmented_arg *augmented_arg = arg->augmented.args;
1030 int type_id = arg->fmt->type_id, consumed;
1031 struct btf_dump *btf_dump;
1032
1033 LIBBPF_OPTS(btf_dump_opts, dump_opts);
1034 LIBBPF_OPTS(btf_dump_type_data_opts, dump_data_opts);
1035
1036 if (arg == NULL || arg->augmented.args == NULL)
1037 return 0;
1038
1039 dump_data_opts.compact = true;
1040 dump_data_opts.skip_names = !arg->trace->show_arg_names;
1041
1042 btf_dump = btf_dump__new(btf, trace__btf_dump_snprintf, &ctx, &dump_opts);
1043 if (btf_dump == NULL)
1044 return 0;
1045
1046 /* pretty print the struct data here */
1047 if (btf_dump__dump_type_data(btf_dump, type_id, arg->augmented.args->value, type->size, &dump_data_opts) == 0)
1048 return 0;
1049
1050 consumed = sizeof(*augmented_arg) + augmented_arg->size;
1051 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1052 arg->augmented.size -= consumed;
1053
1054 btf_dump__free(btf_dump);
1055
1056 return ctx.printed;
1057}
1058
1059static size_t trace__btf_scnprintf(struct trace *trace, struct syscall_arg *arg, char *bf,
1060 size_t size, int val, char *type)
1061{
1062 struct syscall_arg_fmt *arg_fmt = arg->fmt;
1063
1064 if (trace->btf == NULL)
1065 return 0;
1066
1067 if (arg_fmt->type == NULL) {
1068 // Check if this is an enum and if we have the BTF type for it.
1069 syscall_arg_fmt__cache_btf_enum(arg_fmt, trace->btf, type);
1070 }
1071
1072 // Did we manage to find a BTF type for the syscall/tracepoint argument?
1073 if (arg_fmt->type == NULL)
1074 return 0;
1075
1076 if (btf_is_enum(arg_fmt->type))
1077 return btf_enum_scnprintf(arg_fmt->type, trace->btf, bf, size, val);
1078 else if (btf_is_struct(arg_fmt->type) || btf_is_union(arg_fmt->type))
1079 return btf_struct_scnprintf(arg_fmt->type, trace->btf, bf, size, arg);
1080
1081 return 0;
1082}
1083
1084#else // HAVE_LIBBPF_SUPPORT
1085static size_t trace__btf_scnprintf(struct trace *trace __maybe_unused, struct syscall_arg *arg __maybe_unused,
1086 char *bf __maybe_unused, size_t size __maybe_unused, int val __maybe_unused,
1087 char *type __maybe_unused)
1088{
1089 return 0;
1090}
1091
1092static bool syscall_arg__strtoul_btf_type(char *bf __maybe_unused, size_t size __maybe_unused,
1093 struct syscall_arg *arg __maybe_unused, u64 *val __maybe_unused)
1094{
1095 return false;
1096}
1097#endif // HAVE_LIBBPF_SUPPORT
1098
1099#define STUL_BTF_TYPE syscall_arg__strtoul_btf_type
1100
1101#define STRARRAY(name, array) \
1102 { .scnprintf = SCA_STRARRAY, \
1103 .strtoul = STUL_STRARRAY, \
1104 .parm = &strarray__##array, }
1105
1106#define STRARRAY_FLAGS(name, array) \
1107 { .scnprintf = SCA_STRARRAY_FLAGS, \
1108 .strtoul = STUL_STRARRAY_FLAGS, \
1109 .parm = &strarray__##array, }
1110
1111#include "trace/beauty/arch_errno_names.c"
1112#include "trace/beauty/eventfd.c"
1113#include "trace/beauty/futex_op.c"
1114#include "trace/beauty/futex_val3.c"
1115#include "trace/beauty/mmap.c"
1116#include "trace/beauty/mode_t.c"
1117#include "trace/beauty/msg_flags.c"
1118#include "trace/beauty/open_flags.c"
1119#include "trace/beauty/perf_event_open.c"
1120#include "trace/beauty/pid.c"
1121#include "trace/beauty/sched_policy.c"
1122#include "trace/beauty/seccomp.c"
1123#include "trace/beauty/signum.c"
1124#include "trace/beauty/socket_type.c"
1125#include "trace/beauty/waitid_options.c"
1126
1127static const struct syscall_fmt syscall_fmts[] = {
1128 { .name = "access",
1129 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
1130 { .name = "arch_prctl",
1131 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
1132 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
1133 { .name = "bind",
1134 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
1135 [1] = SCA_SOCKADDR_FROM_USER(umyaddr),
1136 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
1137 { .name = "bpf",
1138 .arg = { [0] = STRARRAY(cmd, bpf_cmd),
1139 [1] = { .from_user = true /* attr */, }, } },
1140 { .name = "brk", .hexret = true,
1141 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
1142 { .name = "clock_gettime",
1143 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
1144 { .name = "clock_nanosleep",
1145 .arg = { [2] = SCA_TIMESPEC_FROM_USER(req), }, },
1146 { .name = "clone", .errpid = true, .nr_args = 5,
1147 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
1148 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
1149 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
1150 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
1151 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
1152 { .name = "close",
1153 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
1154 { .name = "connect",
1155 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
1156 [1] = SCA_SOCKADDR_FROM_USER(servaddr),
1157 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
1158 { .name = "epoll_ctl",
1159 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
1160 { .name = "eventfd2",
1161 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
1162 { .name = "faccessat",
1163 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ },
1164 [1] = SCA_FILENAME_FROM_USER(pathname),
1165 [2] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
1166 { .name = "faccessat2",
1167 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ },
1168 [1] = SCA_FILENAME_FROM_USER(pathname),
1169 [2] = { .scnprintf = SCA_ACCMODE, /* mode */ },
1170 [3] = { .scnprintf = SCA_FACCESSAT2_FLAGS, /* flags */ }, }, },
1171 { .name = "fchmodat",
1172 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1173 { .name = "fchownat",
1174 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1175 { .name = "fcntl",
1176 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
1177 .strtoul = STUL_STRARRAYS,
1178 .parm = &strarrays__fcntl_cmds_arrays,
1179 .show_zero = true, },
1180 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
1181 { .name = "flock",
1182 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
1183 { .name = "fsconfig",
1184 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
1185 { .name = "fsmount",
1186 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
1187 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
1188 { .name = "fspick",
1189 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1190 [1] = SCA_FILENAME_FROM_USER(path),
1191 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
1192 { .name = "fstat", .alias = "newfstat", },
1193 { .name = "futex",
1194 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
1195 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
1196 { .name = "futimesat",
1197 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1198 { .name = "getitimer",
1199 .arg = { [0] = STRARRAY(which, itimers), }, },
1200 { .name = "getpid", .errpid = true, },
1201 { .name = "getpgid", .errpid = true, },
1202 { .name = "getppid", .errpid = true, },
1203 { .name = "getrandom",
1204 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
1205 { .name = "getrlimit",
1206 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1207 { .name = "getsockopt",
1208 .arg = { [1] = STRARRAY(level, socket_level), }, },
1209 { .name = "gettid", .errpid = true, },
1210 { .name = "ioctl",
1211 .arg = {
1212#if defined(__i386__) || defined(__x86_64__)
1213/*
1214 * FIXME: Make this available to all arches.
1215 */
1216 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
1217 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
1218#else
1219 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
1220#endif
1221 { .name = "kcmp", .nr_args = 5,
1222 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
1223 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
1224 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
1225 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
1226 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
1227 { .name = "keyctl",
1228 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
1229 { .name = "kill",
1230 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1231 { .name = "linkat",
1232 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1233 { .name = "lseek",
1234 .arg = { [2] = STRARRAY(whence, whences), }, },
1235 { .name = "lstat", .alias = "newlstat", },
1236 { .name = "madvise",
1237 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1238 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1239 { .name = "mkdirat",
1240 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1241 { .name = "mknodat",
1242 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1243 { .name = "mmap", .hexret = true,
1244/* The standard mmap maps to old_mmap on s390x */
1245#if defined(__s390x__)
1246 .alias = "old_mmap",
1247#endif
1248 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ },
1249 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1250 .strtoul = STUL_STRARRAY_FLAGS,
1251 .parm = &strarray__mmap_flags, },
1252 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1253 { .name = "mount",
1254 .arg = { [0] = SCA_FILENAME_FROM_USER(devname),
1255 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1256 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1257 { .name = "move_mount",
1258 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1259 [1] = SCA_FILENAME_FROM_USER(pathname),
1260 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1261 [3] = SCA_FILENAME_FROM_USER(pathname),
1262 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1263 { .name = "mprotect",
1264 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1265 [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, }, },
1266 { .name = "mq_unlink",
1267 .arg = { [0] = SCA_FILENAME_FROM_USER(u_name), }, },
1268 { .name = "mremap", .hexret = true,
1269 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1270 { .name = "name_to_handle_at",
1271 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1272 { .name = "nanosleep",
1273 .arg = { [0] = SCA_TIMESPEC_FROM_USER(req), }, },
1274 { .name = "newfstatat", .alias = "fstatat",
1275 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ },
1276 [1] = SCA_FILENAME_FROM_USER(pathname),
1277 [3] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, },
1278 { .name = "open",
1279 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1280 { .name = "open_by_handle_at",
1281 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1282 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1283 { .name = "openat",
1284 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1285 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1286 { .name = "perf_event_open",
1287 .arg = { [0] = SCA_PERF_ATTR_FROM_USER(attr),
1288 [2] = { .scnprintf = SCA_INT, /* cpu */ },
1289 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1290 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1291 { .name = "pipe2",
1292 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1293 { .name = "pkey_alloc",
1294 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1295 { .name = "pkey_free",
1296 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1297 { .name = "pkey_mprotect",
1298 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1299 [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ },
1300 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1301 { .name = "poll", .timeout = true, },
1302 { .name = "ppoll", .timeout = true, },
1303 { .name = "prctl",
1304 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1305 .strtoul = STUL_STRARRAY,
1306 .parm = &strarray__prctl_options, },
1307 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1308 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1309 { .name = "pread", .alias = "pread64", },
1310 { .name = "preadv", .alias = "pread", },
1311 { .name = "prlimit64",
1312 .arg = { [1] = STRARRAY(resource, rlimit_resources),
1313 [2] = { .from_user = true /* new_rlim */, }, }, },
1314 { .name = "pwrite", .alias = "pwrite64", },
1315 { .name = "readlinkat",
1316 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1317 { .name = "recvfrom",
1318 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1319 { .name = "recvmmsg",
1320 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1321 { .name = "recvmsg",
1322 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1323 { .name = "renameat",
1324 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1325 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1326 { .name = "renameat2",
1327 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1328 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1329 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1330 { .name = "rseq", .errpid = true,
1331 .arg = { [0] = { .from_user = true /* rseq */, }, }, },
1332 { .name = "rt_sigaction",
1333 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1334 { .name = "rt_sigprocmask",
1335 .arg = { [0] = STRARRAY(how, sighow), }, },
1336 { .name = "rt_sigqueueinfo",
1337 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1338 { .name = "rt_tgsigqueueinfo",
1339 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1340 { .name = "sched_setscheduler",
1341 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1342 { .name = "seccomp",
1343 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1344 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1345 { .name = "select", .timeout = true, },
1346 { .name = "sendfile", .alias = "sendfile64", },
1347 { .name = "sendmmsg",
1348 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1349 { .name = "sendmsg",
1350 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1351 { .name = "sendto",
1352 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1353 [4] = SCA_SOCKADDR_FROM_USER(addr), }, },
1354 { .name = "set_robust_list", .errpid = true,
1355 .arg = { [0] = { .from_user = true /* head */, }, }, },
1356 { .name = "set_tid_address", .errpid = true, },
1357 { .name = "setitimer",
1358 .arg = { [0] = STRARRAY(which, itimers), }, },
1359 { .name = "setrlimit",
1360 .arg = { [0] = STRARRAY(resource, rlimit_resources),
1361 [1] = { .from_user = true /* rlim */, }, }, },
1362 { .name = "setsockopt",
1363 .arg = { [1] = STRARRAY(level, socket_level), }, },
1364 { .name = "socket",
1365 .arg = { [0] = STRARRAY(family, socket_families),
1366 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1367 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1368 { .name = "socketpair",
1369 .arg = { [0] = STRARRAY(family, socket_families),
1370 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1371 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1372 { .name = "stat", .alias = "newstat", },
1373 { .name = "statx",
1374 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1375 [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ } ,
1376 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1377 { .name = "swapoff",
1378 .arg = { [0] = SCA_FILENAME_FROM_USER(specialfile), }, },
1379 { .name = "swapon",
1380 .arg = { [0] = SCA_FILENAME_FROM_USER(specialfile), }, },
1381 { .name = "symlinkat",
1382 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1383 { .name = "sync_file_range",
1384 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1385 { .name = "tgkill",
1386 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1387 { .name = "tkill",
1388 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1389 { .name = "umount2", .alias = "umount",
1390 .arg = { [0] = SCA_FILENAME_FROM_USER(name), }, },
1391 { .name = "uname", .alias = "newuname", },
1392 { .name = "unlinkat",
1393 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1394 [1] = SCA_FILENAME_FROM_USER(pathname),
1395 [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, },
1396 { .name = "utimensat",
1397 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1398 { .name = "wait4", .errpid = true,
1399 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1400 { .name = "waitid", .errpid = true,
1401 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1402 { .name = "write",
1403 .arg = { [1] = { .scnprintf = SCA_BUF /* buf */, .from_user = true, }, }, },
1404};
1405
1406static int syscall_fmt__cmp(const void *name, const void *fmtp)
1407{
1408 const struct syscall_fmt *fmt = fmtp;
1409 return strcmp(name, fmt->name);
1410}
1411
1412static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts,
1413 const int nmemb,
1414 const char *name)
1415{
1416 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1417}
1418
1419static const struct syscall_fmt *syscall_fmt__find(const char *name)
1420{
1421 const int nmemb = ARRAY_SIZE(syscall_fmts);
1422 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1423}
1424
1425static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts,
1426 const int nmemb, const char *alias)
1427{
1428 int i;
1429
1430 for (i = 0; i < nmemb; ++i) {
1431 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1432 return &fmts[i];
1433 }
1434
1435 return NULL;
1436}
1437
1438static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1439{
1440 const int nmemb = ARRAY_SIZE(syscall_fmts);
1441 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1442}
1443
1444/*
1445 * is_exit: is this "exit" or "exit_group"?
1446 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1447 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1448 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1449 */
1450struct syscall {
1451 struct tep_event *tp_format;
1452 int nr_args;
1453 int args_size;
1454 struct {
1455 struct bpf_program *sys_enter,
1456 *sys_exit;
1457 } bpf_prog;
1458 bool is_exit;
1459 bool is_open;
1460 bool nonexistent;
1461 bool use_btf;
1462 struct tep_format_field *args;
1463 const char *name;
1464 const struct syscall_fmt *fmt;
1465 struct syscall_arg_fmt *arg_fmt;
1466};
1467
1468/*
1469 * We need to have this 'calculated' boolean because in some cases we really
1470 * don't know what is the duration of a syscall, for instance, when we start
1471 * a session and some threads are waiting for a syscall to finish, say 'poll',
1472 * in which case all we can do is to print "( ? ) for duration and for the
1473 * start timestamp.
1474 */
1475static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1476{
1477 double duration = (double)t / NSEC_PER_MSEC;
1478 size_t printed = fprintf(fp, "(");
1479
1480 if (!calculated)
1481 printed += fprintf(fp, " ");
1482 else if (duration >= 1.0)
1483 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1484 else if (duration >= 0.01)
1485 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1486 else
1487 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1488 return printed + fprintf(fp, "): ");
1489}
1490
1491/**
1492 * filename.ptr: The filename char pointer that will be vfs_getname'd
1493 * filename.entry_str_pos: Where to insert the string translated from
1494 * filename.ptr by the vfs_getname tracepoint/kprobe.
1495 * ret_scnprintf: syscall args may set this to a different syscall return
1496 * formatter, for instance, fcntl may return fds, file flags, etc.
1497 */
1498struct thread_trace {
1499 u64 entry_time;
1500 bool entry_pending;
1501 unsigned long nr_events;
1502 unsigned long pfmaj, pfmin;
1503 char *entry_str;
1504 double runtime_ms;
1505 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1506 struct {
1507 unsigned long ptr;
1508 short int entry_str_pos;
1509 bool pending_open;
1510 unsigned int namelen;
1511 char *name;
1512 } filename;
1513 struct {
1514 int max;
1515 struct file *table;
1516 } files;
1517
1518 struct intlist *syscall_stats;
1519};
1520
1521static struct thread_trace *thread_trace__new(void)
1522{
1523 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1524
1525 if (ttrace) {
1526 ttrace->files.max = -1;
1527 ttrace->syscall_stats = intlist__new(NULL);
1528 }
1529
1530 return ttrace;
1531}
1532
1533static void thread_trace__free_files(struct thread_trace *ttrace);
1534
1535static void thread_trace__delete(void *pttrace)
1536{
1537 struct thread_trace *ttrace = pttrace;
1538
1539 if (!ttrace)
1540 return;
1541
1542 intlist__delete(ttrace->syscall_stats);
1543 ttrace->syscall_stats = NULL;
1544 thread_trace__free_files(ttrace);
1545 zfree(&ttrace->entry_str);
1546 free(ttrace);
1547}
1548
1549static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1550{
1551 struct thread_trace *ttrace;
1552
1553 if (thread == NULL)
1554 goto fail;
1555
1556 if (thread__priv(thread) == NULL)
1557 thread__set_priv(thread, thread_trace__new());
1558
1559 if (thread__priv(thread) == NULL)
1560 goto fail;
1561
1562 ttrace = thread__priv(thread);
1563 ++ttrace->nr_events;
1564
1565 return ttrace;
1566fail:
1567 color_fprintf(fp, PERF_COLOR_RED,
1568 "WARNING: not enough memory, dropping samples!\n");
1569 return NULL;
1570}
1571
1572
1573void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1574 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1575{
1576 struct thread_trace *ttrace = thread__priv(arg->thread);
1577
1578 ttrace->ret_scnprintf = ret_scnprintf;
1579}
1580
1581#define TRACE_PFMAJ (1 << 0)
1582#define TRACE_PFMIN (1 << 1)
1583
1584static const size_t trace__entry_str_size = 2048;
1585
1586static void thread_trace__free_files(struct thread_trace *ttrace)
1587{
1588 for (int i = 0; i < ttrace->files.max; ++i) {
1589 struct file *file = ttrace->files.table + i;
1590 zfree(&file->pathname);
1591 }
1592
1593 zfree(&ttrace->files.table);
1594 ttrace->files.max = -1;
1595}
1596
1597static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1598{
1599 if (fd < 0)
1600 return NULL;
1601
1602 if (fd > ttrace->files.max) {
1603 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1604
1605 if (nfiles == NULL)
1606 return NULL;
1607
1608 if (ttrace->files.max != -1) {
1609 memset(nfiles + ttrace->files.max + 1, 0,
1610 (fd - ttrace->files.max) * sizeof(struct file));
1611 } else {
1612 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1613 }
1614
1615 ttrace->files.table = nfiles;
1616 ttrace->files.max = fd;
1617 }
1618
1619 return ttrace->files.table + fd;
1620}
1621
1622struct file *thread__files_entry(struct thread *thread, int fd)
1623{
1624 return thread_trace__files_entry(thread__priv(thread), fd);
1625}
1626
1627static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1628{
1629 struct thread_trace *ttrace = thread__priv(thread);
1630 struct file *file = thread_trace__files_entry(ttrace, fd);
1631
1632 if (file != NULL) {
1633 struct stat st;
1634 if (stat(pathname, &st) == 0)
1635 file->dev_maj = major(st.st_rdev);
1636 file->pathname = strdup(pathname);
1637 if (file->pathname)
1638 return 0;
1639 }
1640
1641 return -1;
1642}
1643
1644static int thread__read_fd_path(struct thread *thread, int fd)
1645{
1646 char linkname[PATH_MAX], pathname[PATH_MAX];
1647 struct stat st;
1648 int ret;
1649
1650 if (thread__pid(thread) == thread__tid(thread)) {
1651 scnprintf(linkname, sizeof(linkname),
1652 "/proc/%d/fd/%d", thread__pid(thread), fd);
1653 } else {
1654 scnprintf(linkname, sizeof(linkname),
1655 "/proc/%d/task/%d/fd/%d",
1656 thread__pid(thread), thread__tid(thread), fd);
1657 }
1658
1659 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1660 return -1;
1661
1662 ret = readlink(linkname, pathname, sizeof(pathname));
1663
1664 if (ret < 0 || ret > st.st_size)
1665 return -1;
1666
1667 pathname[ret] = '\0';
1668 return trace__set_fd_pathname(thread, fd, pathname);
1669}
1670
1671static const char *thread__fd_path(struct thread *thread, int fd,
1672 struct trace *trace)
1673{
1674 struct thread_trace *ttrace = thread__priv(thread);
1675
1676 if (ttrace == NULL || trace->fd_path_disabled)
1677 return NULL;
1678
1679 if (fd < 0)
1680 return NULL;
1681
1682 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1683 if (!trace->live)
1684 return NULL;
1685 ++trace->stats.proc_getname;
1686 if (thread__read_fd_path(thread, fd))
1687 return NULL;
1688 }
1689
1690 return ttrace->files.table[fd].pathname;
1691}
1692
1693size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1694{
1695 int fd = arg->val;
1696 size_t printed = scnprintf(bf, size, "%d", fd);
1697 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1698
1699 if (path)
1700 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1701
1702 return printed;
1703}
1704
1705size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1706{
1707 size_t printed = scnprintf(bf, size, "%d", fd);
1708 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1709
1710 if (thread) {
1711 const char *path = thread__fd_path(thread, fd, trace);
1712
1713 if (path)
1714 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1715
1716 thread__put(thread);
1717 }
1718
1719 return printed;
1720}
1721
1722static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1723 struct syscall_arg *arg)
1724{
1725 int fd = arg->val;
1726 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1727 struct thread_trace *ttrace = thread__priv(arg->thread);
1728
1729 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1730 zfree(&ttrace->files.table[fd].pathname);
1731
1732 return printed;
1733}
1734
1735static void thread__set_filename_pos(struct thread *thread, const char *bf,
1736 unsigned long ptr)
1737{
1738 struct thread_trace *ttrace = thread__priv(thread);
1739
1740 ttrace->filename.ptr = ptr;
1741 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1742}
1743
1744static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1745{
1746 struct augmented_arg *augmented_arg = arg->augmented.args;
1747 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1748 /*
1749 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1750 * we would have two strings, each prefixed by its size.
1751 */
1752 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1753
1754 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1755 arg->augmented.size -= consumed;
1756
1757 return printed;
1758}
1759
1760static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1761 struct syscall_arg *arg)
1762{
1763 unsigned long ptr = arg->val;
1764
1765 if (arg->augmented.args)
1766 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1767
1768 if (!arg->trace->vfs_getname)
1769 return scnprintf(bf, size, "%#x", ptr);
1770
1771 thread__set_filename_pos(arg->thread, bf, ptr);
1772 return 0;
1773}
1774
1775#define MAX_CONTROL_CHAR 31
1776#define MAX_ASCII 127
1777
1778static size_t syscall_arg__scnprintf_buf(char *bf, size_t size, struct syscall_arg *arg)
1779{
1780 struct augmented_arg *augmented_arg = arg->augmented.args;
1781 unsigned char *orig = (unsigned char *)augmented_arg->value;
1782 size_t printed = 0;
1783 int consumed;
1784
1785 if (augmented_arg == NULL)
1786 return 0;
1787
1788 for (int j = 0; j < augmented_arg->size; ++j) {
1789 bool control_char = orig[j] <= MAX_CONTROL_CHAR || orig[j] >= MAX_ASCII;
1790 /* print control characters (0~31 and 127), and non-ascii characters in \(digits) */
1791 printed += scnprintf(bf + printed, size - printed, control_char ? "\\%d" : "%c", (int)orig[j]);
1792 }
1793
1794 consumed = sizeof(*augmented_arg) + augmented_arg->size;
1795 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1796 arg->augmented.size -= consumed;
1797
1798 return printed;
1799}
1800
1801static bool trace__filter_duration(struct trace *trace, double t)
1802{
1803 return t < (trace->duration_filter * NSEC_PER_MSEC);
1804}
1805
1806static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1807{
1808 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1809
1810 return fprintf(fp, "%10.3f ", ts);
1811}
1812
1813/*
1814 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1815 * using ttrace->entry_time for a thread that receives a sys_exit without
1816 * first having received a sys_enter ("poll" issued before tracing session
1817 * starts, lost sys_enter exit due to ring buffer overflow).
1818 */
1819static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1820{
1821 if (tstamp > 0)
1822 return __trace__fprintf_tstamp(trace, tstamp, fp);
1823
1824 return fprintf(fp, " ? ");
1825}
1826
1827static pid_t workload_pid = -1;
1828static volatile sig_atomic_t done = false;
1829static volatile sig_atomic_t interrupted = false;
1830
1831static void sighandler_interrupt(int sig __maybe_unused)
1832{
1833 done = interrupted = true;
1834}
1835
1836static void sighandler_chld(int sig __maybe_unused, siginfo_t *info,
1837 void *context __maybe_unused)
1838{
1839 if (info->si_pid == workload_pid)
1840 done = true;
1841}
1842
1843static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1844{
1845 size_t printed = 0;
1846
1847 if (trace->multiple_threads) {
1848 if (trace->show_comm)
1849 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1850 printed += fprintf(fp, "%d ", thread__tid(thread));
1851 }
1852
1853 return printed;
1854}
1855
1856static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1857 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1858{
1859 size_t printed = 0;
1860
1861 if (trace->show_tstamp)
1862 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1863 if (trace->show_duration)
1864 printed += fprintf_duration(duration, duration_calculated, fp);
1865 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1866}
1867
1868static int trace__process_event(struct trace *trace, struct machine *machine,
1869 union perf_event *event, struct perf_sample *sample)
1870{
1871 int ret = 0;
1872
1873 switch (event->header.type) {
1874 case PERF_RECORD_LOST:
1875 color_fprintf(trace->output, PERF_COLOR_RED,
1876 "LOST %" PRIu64 " events!\n", (u64)event->lost.lost);
1877 ret = machine__process_lost_event(machine, event, sample);
1878 break;
1879 default:
1880 ret = machine__process_event(machine, event, sample);
1881 break;
1882 }
1883
1884 return ret;
1885}
1886
1887static int trace__tool_process(const struct perf_tool *tool,
1888 union perf_event *event,
1889 struct perf_sample *sample,
1890 struct machine *machine)
1891{
1892 struct trace *trace = container_of(tool, struct trace, tool);
1893 return trace__process_event(trace, machine, event, sample);
1894}
1895
1896static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1897{
1898 struct machine *machine = vmachine;
1899
1900 if (machine->kptr_restrict_warned)
1901 return NULL;
1902
1903 if (symbol_conf.kptr_restrict) {
1904 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1905 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1906 "Kernel samples will not be resolved.\n");
1907 machine->kptr_restrict_warned = true;
1908 return NULL;
1909 }
1910
1911 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1912}
1913
1914static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1915{
1916 int err = symbol__init(NULL);
1917
1918 if (err)
1919 return err;
1920
1921 trace->host = machine__new_host();
1922 if (trace->host == NULL)
1923 return -ENOMEM;
1924
1925 thread__set_priv_destructor(thread_trace__delete);
1926
1927 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1928 if (err < 0)
1929 goto out;
1930
1931 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1932 evlist->core.threads, trace__tool_process,
1933 true, false, 1);
1934out:
1935 if (err)
1936 symbol__exit();
1937
1938 return err;
1939}
1940
1941static void trace__symbols__exit(struct trace *trace)
1942{
1943 machine__exit(trace->host);
1944 trace->host = NULL;
1945
1946 symbol__exit();
1947}
1948
1949static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1950{
1951 int idx;
1952
1953 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0)
1954 nr_args = sc->fmt->nr_args;
1955
1956 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1957 if (sc->arg_fmt == NULL)
1958 return -1;
1959
1960 for (idx = 0; idx < nr_args; ++idx) {
1961 if (sc->fmt)
1962 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1963 }
1964
1965 sc->nr_args = nr_args;
1966 return 0;
1967}
1968
1969static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1970 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1971 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1972};
1973
1974static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1975{
1976 const struct syscall_arg_fmt *fmt = fmtp;
1977 return strcmp(name, fmt->name);
1978}
1979
1980static const struct syscall_arg_fmt *
1981__syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb,
1982 const char *name)
1983{
1984 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1985}
1986
1987static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1988{
1989 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1990 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1991}
1992
1993static struct tep_format_field *
1994syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field,
1995 bool *use_btf)
1996{
1997 struct tep_format_field *last_field = NULL;
1998 int len;
1999
2000 for (; field; field = field->next, ++arg) {
2001 last_field = field;
2002
2003 if (arg->scnprintf)
2004 continue;
2005
2006 len = strlen(field->name);
2007
2008 // As far as heuristics (or intention) goes this seems to hold true, and makes sense!
2009 if ((field->flags & TEP_FIELD_IS_POINTER) && strstarts(field->type, "const "))
2010 arg->from_user = true;
2011
2012 if (strcmp(field->type, "const char *") == 0 &&
2013 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
2014 strstr(field->name, "path") != NULL)) {
2015 arg->scnprintf = SCA_FILENAME;
2016 } else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
2017 arg->scnprintf = SCA_PTR;
2018 else if (strcmp(field->type, "pid_t") == 0)
2019 arg->scnprintf = SCA_PID;
2020 else if (strcmp(field->type, "umode_t") == 0)
2021 arg->scnprintf = SCA_MODE_T;
2022 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
2023 arg->scnprintf = SCA_CHAR_ARRAY;
2024 arg->nr_entries = field->arraylen;
2025 } else if ((strcmp(field->type, "int") == 0 ||
2026 strcmp(field->type, "unsigned int") == 0 ||
2027 strcmp(field->type, "long") == 0) &&
2028 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
2029 /*
2030 * /sys/kernel/tracing/events/syscalls/sys_enter*
2031 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
2032 * 65 int
2033 * 23 unsigned int
2034 * 7 unsigned long
2035 */
2036 arg->scnprintf = SCA_FD;
2037 } else if (strstr(field->type, "enum") && use_btf != NULL) {
2038 *use_btf = true;
2039 arg->strtoul = STUL_BTF_TYPE;
2040 } else {
2041 const struct syscall_arg_fmt *fmt =
2042 syscall_arg_fmt__find_by_name(field->name);
2043
2044 if (fmt) {
2045 arg->scnprintf = fmt->scnprintf;
2046 arg->strtoul = fmt->strtoul;
2047 }
2048 }
2049 }
2050
2051 return last_field;
2052}
2053
2054static int syscall__set_arg_fmts(struct syscall *sc)
2055{
2056 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args,
2057 &sc->use_btf);
2058
2059 if (last_field)
2060 sc->args_size = last_field->offset + last_field->size;
2061
2062 return 0;
2063}
2064
2065static int trace__read_syscall_info(struct trace *trace, int id)
2066{
2067 char tp_name[128];
2068 struct syscall *sc;
2069 const char *name = syscalltbl__name(trace->sctbl, id);
2070 int err;
2071
2072#ifdef HAVE_SYSCALL_TABLE_SUPPORT
2073 if (trace->syscalls.table == NULL) {
2074 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
2075 if (trace->syscalls.table == NULL)
2076 return -ENOMEM;
2077 }
2078#else
2079 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
2080 // When using libaudit we don't know beforehand what is the max syscall id
2081 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
2082
2083 if (table == NULL)
2084 return -ENOMEM;
2085
2086 // Need to memset from offset 0 and +1 members if brand new
2087 if (trace->syscalls.table == NULL)
2088 memset(table, 0, (id + 1) * sizeof(*sc));
2089 else
2090 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
2091
2092 trace->syscalls.table = table;
2093 trace->sctbl->syscalls.max_id = id;
2094 }
2095#endif
2096 sc = trace->syscalls.table + id;
2097 if (sc->nonexistent)
2098 return -EEXIST;
2099
2100 if (name == NULL) {
2101 sc->nonexistent = true;
2102 return -EEXIST;
2103 }
2104
2105 sc->name = name;
2106 sc->fmt = syscall_fmt__find(sc->name);
2107
2108 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
2109 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
2110
2111 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
2112 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
2113 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
2114 }
2115
2116 /*
2117 * Fails to read trace point format via sysfs node, so the trace point
2118 * doesn't exist. Set the 'nonexistent' flag as true.
2119 */
2120 if (IS_ERR(sc->tp_format)) {
2121 sc->nonexistent = true;
2122 return PTR_ERR(sc->tp_format);
2123 }
2124
2125 /*
2126 * The tracepoint format contains __syscall_nr field, so it's one more
2127 * than the actual number of syscall arguments.
2128 */
2129 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ?
2130 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields - 1))
2131 return -ENOMEM;
2132
2133 sc->args = sc->tp_format->format.fields;
2134 /*
2135 * We need to check and discard the first variable '__syscall_nr'
2136 * or 'nr' that mean the syscall number. It is needless here.
2137 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
2138 */
2139 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
2140 sc->args = sc->args->next;
2141 --sc->nr_args;
2142 }
2143
2144 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
2145 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
2146
2147 err = syscall__set_arg_fmts(sc);
2148
2149 /* after calling syscall__set_arg_fmts() we'll know whether use_btf is true */
2150 if (sc->use_btf)
2151 trace__load_vmlinux_btf(trace);
2152
2153 return err;
2154}
2155
2156static int evsel__init_tp_arg_scnprintf(struct evsel *evsel, bool *use_btf)
2157{
2158 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
2159
2160 if (fmt != NULL) {
2161 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields, use_btf);
2162 return 0;
2163 }
2164
2165 return -ENOMEM;
2166}
2167
2168static int intcmp(const void *a, const void *b)
2169{
2170 const int *one = a, *another = b;
2171
2172 return *one - *another;
2173}
2174
2175static int trace__validate_ev_qualifier(struct trace *trace)
2176{
2177 int err = 0;
2178 bool printed_invalid_prefix = false;
2179 struct str_node *pos;
2180 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
2181
2182 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
2183 sizeof(trace->ev_qualifier_ids.entries[0]));
2184
2185 if (trace->ev_qualifier_ids.entries == NULL) {
2186 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
2187 trace->output);
2188 err = -EINVAL;
2189 goto out;
2190 }
2191
2192 strlist__for_each_entry(pos, trace->ev_qualifier) {
2193 const char *sc = pos->s;
2194 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
2195
2196 if (id < 0) {
2197 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
2198 if (id >= 0)
2199 goto matches;
2200
2201 if (!printed_invalid_prefix) {
2202 pr_debug("Skipping unknown syscalls: ");
2203 printed_invalid_prefix = true;
2204 } else {
2205 pr_debug(", ");
2206 }
2207
2208 pr_debug("%s", sc);
2209 continue;
2210 }
2211matches:
2212 trace->ev_qualifier_ids.entries[nr_used++] = id;
2213 if (match_next == -1)
2214 continue;
2215
2216 while (1) {
2217 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
2218 if (id < 0)
2219 break;
2220 if (nr_allocated == nr_used) {
2221 void *entries;
2222
2223 nr_allocated += 8;
2224 entries = realloc(trace->ev_qualifier_ids.entries,
2225 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
2226 if (entries == NULL) {
2227 err = -ENOMEM;
2228 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
2229 goto out_free;
2230 }
2231 trace->ev_qualifier_ids.entries = entries;
2232 }
2233 trace->ev_qualifier_ids.entries[nr_used++] = id;
2234 }
2235 }
2236
2237 trace->ev_qualifier_ids.nr = nr_used;
2238 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
2239out:
2240 if (printed_invalid_prefix)
2241 pr_debug("\n");
2242 return err;
2243out_free:
2244 zfree(&trace->ev_qualifier_ids.entries);
2245 trace->ev_qualifier_ids.nr = 0;
2246 goto out;
2247}
2248
2249static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
2250{
2251 bool in_ev_qualifier;
2252
2253 if (trace->ev_qualifier_ids.nr == 0)
2254 return true;
2255
2256 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
2257 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
2258
2259 if (in_ev_qualifier)
2260 return !trace->not_ev_qualifier;
2261
2262 return trace->not_ev_qualifier;
2263}
2264
2265/*
2266 * args is to be interpreted as a series of longs but we need to handle
2267 * 8-byte unaligned accesses. args points to raw_data within the event
2268 * and raw_data is guaranteed to be 8-byte unaligned because it is
2269 * preceded by raw_size which is a u32. So we need to copy args to a temp
2270 * variable to read it. Most notably this avoids extended load instructions
2271 * on unaligned addresses
2272 */
2273unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
2274{
2275 unsigned long val;
2276 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
2277
2278 memcpy(&val, p, sizeof(val));
2279 return val;
2280}
2281
2282static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
2283 struct syscall_arg *arg)
2284{
2285 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
2286 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
2287
2288 return scnprintf(bf, size, "arg%d: ", arg->idx);
2289}
2290
2291/*
2292 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
2293 * as mount 'flags' argument that needs ignoring some magic flag, see comment
2294 * in tools/perf/trace/beauty/mount_flags.c
2295 */
2296static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
2297{
2298 if (fmt && fmt->mask_val)
2299 return fmt->mask_val(arg, val);
2300
2301 return val;
2302}
2303
2304static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
2305 struct syscall_arg *arg, unsigned long val)
2306{
2307 if (fmt && fmt->scnprintf) {
2308 arg->val = val;
2309 if (fmt->parm)
2310 arg->parm = fmt->parm;
2311 return fmt->scnprintf(bf, size, arg);
2312 }
2313 return scnprintf(bf, size, "%ld", val);
2314}
2315
2316static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
2317 unsigned char *args, void *augmented_args, int augmented_args_size,
2318 struct trace *trace, struct thread *thread)
2319{
2320 size_t printed = 0, btf_printed;
2321 unsigned long val;
2322 u8 bit = 1;
2323 struct syscall_arg arg = {
2324 .args = args,
2325 .augmented = {
2326 .size = augmented_args_size,
2327 .args = augmented_args,
2328 },
2329 .idx = 0,
2330 .mask = 0,
2331 .trace = trace,
2332 .thread = thread,
2333 .show_string_prefix = trace->show_string_prefix,
2334 };
2335 struct thread_trace *ttrace = thread__priv(thread);
2336 void *default_scnprintf;
2337
2338 /*
2339 * Things like fcntl will set this in its 'cmd' formatter to pick the
2340 * right formatter for the return value (an fd? file flags?), which is
2341 * not needed for syscalls that always return a given type, say an fd.
2342 */
2343 ttrace->ret_scnprintf = NULL;
2344
2345 if (sc->args != NULL) {
2346 struct tep_format_field *field;
2347
2348 for (field = sc->args; field;
2349 field = field->next, ++arg.idx, bit <<= 1) {
2350 if (arg.mask & bit)
2351 continue;
2352
2353 arg.fmt = &sc->arg_fmt[arg.idx];
2354 val = syscall_arg__val(&arg, arg.idx);
2355 /*
2356 * Some syscall args need some mask, most don't and
2357 * return val untouched.
2358 */
2359 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2360
2361 /*
2362 * Suppress this argument if its value is zero and show_zero
2363 * property isn't set.
2364 *
2365 * If it has a BTF type, then override the zero suppression knob
2366 * as the common case is for zero in an enum to have an associated entry.
2367 */
2368 if (val == 0 && !trace->show_zeros &&
2369 !(sc->arg_fmt && sc->arg_fmt[arg.idx].show_zero) &&
2370 !(sc->arg_fmt && sc->arg_fmt[arg.idx].strtoul == STUL_BTF_TYPE))
2371 continue;
2372
2373 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2374
2375 if (trace->show_arg_names)
2376 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2377
2378 default_scnprintf = sc->arg_fmt[arg.idx].scnprintf;
2379
2380 if (trace->force_btf || default_scnprintf == NULL || default_scnprintf == SCA_PTR) {
2381 btf_printed = trace__btf_scnprintf(trace, &arg, bf + printed,
2382 size - printed, val, field->type);
2383 if (btf_printed) {
2384 printed += btf_printed;
2385 continue;
2386 }
2387 }
2388
2389 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2390 bf + printed, size - printed, &arg, val);
2391 }
2392 } else if (IS_ERR(sc->tp_format)) {
2393 /*
2394 * If we managed to read the tracepoint /format file, then we
2395 * may end up not having any args, like with gettid(), so only
2396 * print the raw args when we didn't manage to read it.
2397 */
2398 while (arg.idx < sc->nr_args) {
2399 if (arg.mask & bit)
2400 goto next_arg;
2401 val = syscall_arg__val(&arg, arg.idx);
2402 if (printed)
2403 printed += scnprintf(bf + printed, size - printed, ", ");
2404 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2405 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2406next_arg:
2407 ++arg.idx;
2408 bit <<= 1;
2409 }
2410 }
2411
2412 return printed;
2413}
2414
2415typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2416 union perf_event *event,
2417 struct perf_sample *sample);
2418
2419static struct syscall *trace__syscall_info(struct trace *trace,
2420 struct evsel *evsel, int id)
2421{
2422 int err = 0;
2423
2424 if (id < 0) {
2425
2426 /*
2427 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2428 * before that, leaving at a higher verbosity level till that is
2429 * explained. Reproduced with plain ftrace with:
2430 *
2431 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2432 * grep "NR -1 " /t/trace_pipe
2433 *
2434 * After generating some load on the machine.
2435 */
2436 if (verbose > 1) {
2437 static u64 n;
2438 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2439 id, evsel__name(evsel), ++n);
2440 }
2441 return NULL;
2442 }
2443
2444 err = -EINVAL;
2445
2446#ifdef HAVE_SYSCALL_TABLE_SUPPORT
2447 if (id > trace->sctbl->syscalls.max_id) {
2448#else
2449 if (id >= trace->sctbl->syscalls.max_id) {
2450 /*
2451 * With libaudit we don't know beforehand what is the max_id,
2452 * so we let trace__read_syscall_info() figure that out as we
2453 * go on reading syscalls.
2454 */
2455 err = trace__read_syscall_info(trace, id);
2456 if (err)
2457#endif
2458 goto out_cant_read;
2459 }
2460
2461 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2462 (err = trace__read_syscall_info(trace, id)) != 0)
2463 goto out_cant_read;
2464
2465 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
2466 goto out_cant_read;
2467
2468 return &trace->syscalls.table[id];
2469
2470out_cant_read:
2471 if (verbose > 0) {
2472 char sbuf[STRERR_BUFSIZE];
2473 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2474 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2475 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2476 fputs(" information\n", trace->output);
2477 }
2478 return NULL;
2479}
2480
2481struct syscall_stats {
2482 struct stats stats;
2483 u64 nr_failures;
2484 int max_errno;
2485 u32 *errnos;
2486};
2487
2488static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2489 int id, struct perf_sample *sample, long err, bool errno_summary)
2490{
2491 struct int_node *inode;
2492 struct syscall_stats *stats;
2493 u64 duration = 0;
2494
2495 inode = intlist__findnew(ttrace->syscall_stats, id);
2496 if (inode == NULL)
2497 return;
2498
2499 stats = inode->priv;
2500 if (stats == NULL) {
2501 stats = zalloc(sizeof(*stats));
2502 if (stats == NULL)
2503 return;
2504
2505 init_stats(&stats->stats);
2506 inode->priv = stats;
2507 }
2508
2509 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2510 duration = sample->time - ttrace->entry_time;
2511
2512 update_stats(&stats->stats, duration);
2513
2514 if (err < 0) {
2515 ++stats->nr_failures;
2516
2517 if (!errno_summary)
2518 return;
2519
2520 err = -err;
2521 if (err > stats->max_errno) {
2522 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2523
2524 if (new_errnos) {
2525 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2526 } else {
2527 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2528 thread__comm_str(thread), thread__pid(thread),
2529 thread__tid(thread));
2530 return;
2531 }
2532
2533 stats->errnos = new_errnos;
2534 stats->max_errno = err;
2535 }
2536
2537 ++stats->errnos[err - 1];
2538 }
2539}
2540
2541static int trace__printf_interrupted_entry(struct trace *trace)
2542{
2543 struct thread_trace *ttrace;
2544 size_t printed;
2545 int len;
2546
2547 if (trace->failure_only || trace->current == NULL)
2548 return 0;
2549
2550 ttrace = thread__priv(trace->current);
2551
2552 if (!ttrace->entry_pending)
2553 return 0;
2554
2555 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2556 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2557
2558 if (len < trace->args_alignment - 4)
2559 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2560
2561 printed += fprintf(trace->output, " ...\n");
2562
2563 ttrace->entry_pending = false;
2564 ++trace->nr_events_printed;
2565
2566 return printed;
2567}
2568
2569static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2570 struct perf_sample *sample, struct thread *thread)
2571{
2572 int printed = 0;
2573
2574 if (trace->print_sample) {
2575 double ts = (double)sample->time / NSEC_PER_MSEC;
2576
2577 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2578 evsel__name(evsel), ts,
2579 thread__comm_str(thread),
2580 sample->pid, sample->tid, sample->cpu);
2581 }
2582
2583 return printed;
2584}
2585
2586static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2587{
2588 void *augmented_args = NULL;
2589 /*
2590 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2591 * and there we get all 6 syscall args plus the tracepoint common fields
2592 * that gets calculated at the start and the syscall_nr (another long).
2593 * So we check if that is the case and if so don't look after the
2594 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2595 * which is fixed.
2596 *
2597 * We'll revisit this later to pass s->args_size to the BPF augmenter
2598 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2599 * copies only what we need for each syscall, like what happens when we
2600 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2601 * traffic to just what is needed for each syscall.
2602 */
2603 int args_size = raw_augmented_args_size ?: sc->args_size;
2604
2605 *augmented_args_size = sample->raw_size - args_size;
2606 if (*augmented_args_size > 0)
2607 augmented_args = sample->raw_data + args_size;
2608
2609 return augmented_args;
2610}
2611
2612static void syscall__exit(struct syscall *sc)
2613{
2614 if (!sc)
2615 return;
2616
2617 zfree(&sc->arg_fmt);
2618}
2619
2620static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2621 union perf_event *event __maybe_unused,
2622 struct perf_sample *sample)
2623{
2624 char *msg;
2625 void *args;
2626 int printed = 0;
2627 struct thread *thread;
2628 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2629 int augmented_args_size = 0;
2630 void *augmented_args = NULL;
2631 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2632 struct thread_trace *ttrace;
2633
2634 if (sc == NULL)
2635 return -1;
2636
2637 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2638 ttrace = thread__trace(thread, trace->output);
2639 if (ttrace == NULL)
2640 goto out_put;
2641
2642 trace__fprintf_sample(trace, evsel, sample, thread);
2643
2644 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2645
2646 if (ttrace->entry_str == NULL) {
2647 ttrace->entry_str = malloc(trace__entry_str_size);
2648 if (!ttrace->entry_str)
2649 goto out_put;
2650 }
2651
2652 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2653 trace__printf_interrupted_entry(trace);
2654 /*
2655 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2656 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2657 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2658 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2659 * so when handling, say the openat syscall, we end up getting 6 args for the
2660 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2661 * thinking that the extra 2 u64 args are the augmented filename, so just check
2662 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2663 */
2664 if (evsel != trace->syscalls.events.sys_enter)
2665 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2666 ttrace->entry_time = sample->time;
2667 msg = ttrace->entry_str;
2668 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2669
2670 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2671 args, augmented_args, augmented_args_size, trace, thread);
2672
2673 if (sc->is_exit) {
2674 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2675 int alignment = 0;
2676
2677 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2678 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2679 if (trace->args_alignment > printed)
2680 alignment = trace->args_alignment - printed;
2681 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2682 }
2683 } else {
2684 ttrace->entry_pending = true;
2685 /* See trace__vfs_getname & trace__sys_exit */
2686 ttrace->filename.pending_open = false;
2687 }
2688
2689 if (trace->current != thread) {
2690 thread__put(trace->current);
2691 trace->current = thread__get(thread);
2692 }
2693 err = 0;
2694out_put:
2695 thread__put(thread);
2696 return err;
2697}
2698
2699static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2700 struct perf_sample *sample)
2701{
2702 struct thread_trace *ttrace;
2703 struct thread *thread;
2704 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2705 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2706 char msg[1024];
2707 void *args, *augmented_args = NULL;
2708 int augmented_args_size;
2709 size_t printed = 0;
2710
2711 if (sc == NULL)
2712 return -1;
2713
2714 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2715 ttrace = thread__trace(thread, trace->output);
2716 /*
2717 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2718 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2719 */
2720 if (ttrace == NULL)
2721 goto out_put;
2722
2723 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2724 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2725 printed += syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2726 fprintf(trace->output, "%.*s", (int)printed, msg);
2727 err = 0;
2728out_put:
2729 thread__put(thread);
2730 return err;
2731}
2732
2733static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2734 struct perf_sample *sample,
2735 struct callchain_cursor *cursor)
2736{
2737 struct addr_location al;
2738 int max_stack = evsel->core.attr.sample_max_stack ?
2739 evsel->core.attr.sample_max_stack :
2740 trace->max_stack;
2741 int err = -1;
2742
2743 addr_location__init(&al);
2744 if (machine__resolve(trace->host, &al, sample) < 0)
2745 goto out;
2746
2747 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2748out:
2749 addr_location__exit(&al);
2750 return err;
2751}
2752
2753static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2754{
2755 /* TODO: user-configurable print_opts */
2756 const unsigned int print_opts = EVSEL__PRINT_SYM |
2757 EVSEL__PRINT_DSO |
2758 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2759
2760 return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output);
2761}
2762
2763static const char *errno_to_name(struct evsel *evsel, int err)
2764{
2765 struct perf_env *env = evsel__env(evsel);
2766
2767 return perf_env__arch_strerrno(env, err);
2768}
2769
2770static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2771 union perf_event *event __maybe_unused,
2772 struct perf_sample *sample)
2773{
2774 long ret;
2775 u64 duration = 0;
2776 bool duration_calculated = false;
2777 struct thread *thread;
2778 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2779 int alignment = trace->args_alignment;
2780 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2781 struct thread_trace *ttrace;
2782
2783 if (sc == NULL)
2784 return -1;
2785
2786 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2787 ttrace = thread__trace(thread, trace->output);
2788 if (ttrace == NULL)
2789 goto out_put;
2790
2791 trace__fprintf_sample(trace, evsel, sample, thread);
2792
2793 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2794
2795 if (trace->summary)
2796 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2797
2798 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2799 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2800 ttrace->filename.pending_open = false;
2801 ++trace->stats.vfs_getname;
2802 }
2803
2804 if (ttrace->entry_time) {
2805 duration = sample->time - ttrace->entry_time;
2806 if (trace__filter_duration(trace, duration))
2807 goto out;
2808 duration_calculated = true;
2809 } else if (trace->duration_filter)
2810 goto out;
2811
2812 if (sample->callchain) {
2813 struct callchain_cursor *cursor = get_tls_callchain_cursor();
2814
2815 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2816 if (callchain_ret == 0) {
2817 if (cursor->nr < trace->min_stack)
2818 goto out;
2819 callchain_ret = 1;
2820 }
2821 }
2822
2823 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2824 goto out;
2825
2826 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2827
2828 if (ttrace->entry_pending) {
2829 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2830 } else {
2831 printed += fprintf(trace->output, " ... [");
2832 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2833 printed += 9;
2834 printed += fprintf(trace->output, "]: %s()", sc->name);
2835 }
2836
2837 printed++; /* the closing ')' */
2838
2839 if (alignment > printed)
2840 alignment -= printed;
2841 else
2842 alignment = 0;
2843
2844 fprintf(trace->output, ")%*s= ", alignment, " ");
2845
2846 if (sc->fmt == NULL) {
2847 if (ret < 0)
2848 goto errno_print;
2849signed_print:
2850 fprintf(trace->output, "%ld", ret);
2851 } else if (ret < 0) {
2852errno_print: {
2853 char bf[STRERR_BUFSIZE];
2854 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2855 *e = errno_to_name(evsel, -ret);
2856
2857 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2858 }
2859 } else if (ret == 0 && sc->fmt->timeout)
2860 fprintf(trace->output, "0 (Timeout)");
2861 else if (ttrace->ret_scnprintf) {
2862 char bf[1024];
2863 struct syscall_arg arg = {
2864 .val = ret,
2865 .thread = thread,
2866 .trace = trace,
2867 };
2868 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2869 ttrace->ret_scnprintf = NULL;
2870 fprintf(trace->output, "%s", bf);
2871 } else if (sc->fmt->hexret)
2872 fprintf(trace->output, "%#lx", ret);
2873 else if (sc->fmt->errpid) {
2874 struct thread *child = machine__find_thread(trace->host, ret, ret);
2875
2876 if (child != NULL) {
2877 fprintf(trace->output, "%ld", ret);
2878 if (thread__comm_set(child))
2879 fprintf(trace->output, " (%s)", thread__comm_str(child));
2880 thread__put(child);
2881 }
2882 } else
2883 goto signed_print;
2884
2885 fputc('\n', trace->output);
2886
2887 /*
2888 * We only consider an 'event' for the sake of --max-events a non-filtered
2889 * sys_enter + sys_exit and other tracepoint events.
2890 */
2891 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2892 interrupted = true;
2893
2894 if (callchain_ret > 0)
2895 trace__fprintf_callchain(trace, sample);
2896 else if (callchain_ret < 0)
2897 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2898out:
2899 ttrace->entry_pending = false;
2900 err = 0;
2901out_put:
2902 thread__put(thread);
2903 return err;
2904}
2905
2906static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2907 union perf_event *event __maybe_unused,
2908 struct perf_sample *sample)
2909{
2910 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2911 struct thread_trace *ttrace;
2912 size_t filename_len, entry_str_len, to_move;
2913 ssize_t remaining_space;
2914 char *pos;
2915 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2916
2917 if (!thread)
2918 goto out;
2919
2920 ttrace = thread__priv(thread);
2921 if (!ttrace)
2922 goto out_put;
2923
2924 filename_len = strlen(filename);
2925 if (filename_len == 0)
2926 goto out_put;
2927
2928 if (ttrace->filename.namelen < filename_len) {
2929 char *f = realloc(ttrace->filename.name, filename_len + 1);
2930
2931 if (f == NULL)
2932 goto out_put;
2933
2934 ttrace->filename.namelen = filename_len;
2935 ttrace->filename.name = f;
2936 }
2937
2938 strcpy(ttrace->filename.name, filename);
2939 ttrace->filename.pending_open = true;
2940
2941 if (!ttrace->filename.ptr)
2942 goto out_put;
2943
2944 entry_str_len = strlen(ttrace->entry_str);
2945 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2946 if (remaining_space <= 0)
2947 goto out_put;
2948
2949 if (filename_len > (size_t)remaining_space) {
2950 filename += filename_len - remaining_space;
2951 filename_len = remaining_space;
2952 }
2953
2954 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2955 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2956 memmove(pos + filename_len, pos, to_move);
2957 memcpy(pos, filename, filename_len);
2958
2959 ttrace->filename.ptr = 0;
2960 ttrace->filename.entry_str_pos = 0;
2961out_put:
2962 thread__put(thread);
2963out:
2964 return 0;
2965}
2966
2967static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2968 union perf_event *event __maybe_unused,
2969 struct perf_sample *sample)
2970{
2971 u64 runtime = evsel__intval(evsel, sample, "runtime");
2972 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2973 struct thread *thread = machine__findnew_thread(trace->host,
2974 sample->pid,
2975 sample->tid);
2976 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2977
2978 if (ttrace == NULL)
2979 goto out_dump;
2980
2981 ttrace->runtime_ms += runtime_ms;
2982 trace->runtime_ms += runtime_ms;
2983out_put:
2984 thread__put(thread);
2985 return 0;
2986
2987out_dump:
2988 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2989 evsel->name,
2990 evsel__strval(evsel, sample, "comm"),
2991 (pid_t)evsel__intval(evsel, sample, "pid"),
2992 runtime,
2993 evsel__intval(evsel, sample, "vruntime"));
2994 goto out_put;
2995}
2996
2997static int bpf_output__printer(enum binary_printer_ops op,
2998 unsigned int val, void *extra __maybe_unused, FILE *fp)
2999{
3000 unsigned char ch = (unsigned char)val;
3001
3002 switch (op) {
3003 case BINARY_PRINT_CHAR_DATA:
3004 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
3005 case BINARY_PRINT_DATA_BEGIN:
3006 case BINARY_PRINT_LINE_BEGIN:
3007 case BINARY_PRINT_ADDR:
3008 case BINARY_PRINT_NUM_DATA:
3009 case BINARY_PRINT_NUM_PAD:
3010 case BINARY_PRINT_SEP:
3011 case BINARY_PRINT_CHAR_PAD:
3012 case BINARY_PRINT_LINE_END:
3013 case BINARY_PRINT_DATA_END:
3014 default:
3015 break;
3016 }
3017
3018 return 0;
3019}
3020
3021static void bpf_output__fprintf(struct trace *trace,
3022 struct perf_sample *sample)
3023{
3024 binary__fprintf(sample->raw_data, sample->raw_size, 8,
3025 bpf_output__printer, NULL, trace->output);
3026 ++trace->nr_events_printed;
3027}
3028
3029static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
3030 struct thread *thread, void *augmented_args, int augmented_args_size)
3031{
3032 char bf[2048];
3033 size_t size = sizeof(bf);
3034 struct tep_format_field *field = evsel->tp_format->format.fields;
3035 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
3036 size_t printed = 0, btf_printed;
3037 unsigned long val;
3038 u8 bit = 1;
3039 struct syscall_arg syscall_arg = {
3040 .augmented = {
3041 .size = augmented_args_size,
3042 .args = augmented_args,
3043 },
3044 .idx = 0,
3045 .mask = 0,
3046 .trace = trace,
3047 .thread = thread,
3048 .show_string_prefix = trace->show_string_prefix,
3049 };
3050
3051 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
3052 if (syscall_arg.mask & bit)
3053 continue;
3054
3055 syscall_arg.len = 0;
3056 syscall_arg.fmt = arg;
3057 if (field->flags & TEP_FIELD_IS_ARRAY) {
3058 int offset = field->offset;
3059
3060 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
3061 offset = format_field__intval(field, sample, evsel->needs_swap);
3062 syscall_arg.len = offset >> 16;
3063 offset &= 0xffff;
3064 if (tep_field_is_relative(field->flags))
3065 offset += field->offset + field->size;
3066 }
3067
3068 val = (uintptr_t)(sample->raw_data + offset);
3069 } else
3070 val = format_field__intval(field, sample, evsel->needs_swap);
3071 /*
3072 * Some syscall args need some mask, most don't and
3073 * return val untouched.
3074 */
3075 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
3076
3077 /* Suppress this argument if its value is zero and show_zero property isn't set. */
3078 if (val == 0 && !trace->show_zeros && !arg->show_zero && arg->strtoul != STUL_BTF_TYPE)
3079 continue;
3080
3081 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
3082
3083 if (trace->show_arg_names)
3084 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
3085
3086 btf_printed = trace__btf_scnprintf(trace, &syscall_arg, bf + printed, size - printed, val, field->type);
3087 if (btf_printed) {
3088 printed += btf_printed;
3089 continue;
3090 }
3091
3092 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
3093 }
3094
3095 return printed + fprintf(trace->output, "%.*s", (int)printed, bf);
3096}
3097
3098static int trace__event_handler(struct trace *trace, struct evsel *evsel,
3099 union perf_event *event __maybe_unused,
3100 struct perf_sample *sample)
3101{
3102 struct thread *thread;
3103 int callchain_ret = 0;
3104
3105 if (evsel->nr_events_printed >= evsel->max_events)
3106 return 0;
3107
3108 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3109
3110 if (sample->callchain) {
3111 struct callchain_cursor *cursor = get_tls_callchain_cursor();
3112
3113 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
3114 if (callchain_ret == 0) {
3115 if (cursor->nr < trace->min_stack)
3116 goto out;
3117 callchain_ret = 1;
3118 }
3119 }
3120
3121 trace__printf_interrupted_entry(trace);
3122 trace__fprintf_tstamp(trace, sample->time, trace->output);
3123
3124 if (trace->trace_syscalls && trace->show_duration)
3125 fprintf(trace->output, "( ): ");
3126
3127 if (thread)
3128 trace__fprintf_comm_tid(trace, thread, trace->output);
3129
3130 if (evsel == trace->syscalls.events.bpf_output) {
3131 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
3132 struct syscall *sc = trace__syscall_info(trace, evsel, id);
3133
3134 if (sc) {
3135 fprintf(trace->output, "%s(", sc->name);
3136 trace__fprintf_sys_enter(trace, evsel, sample);
3137 fputc(')', trace->output);
3138 goto newline;
3139 }
3140
3141 /*
3142 * XXX: Not having the associated syscall info or not finding/adding
3143 * the thread should never happen, but if it does...
3144 * fall thru and print it as a bpf_output event.
3145 */
3146 }
3147
3148 fprintf(trace->output, "%s(", evsel->name);
3149
3150 if (evsel__is_bpf_output(evsel)) {
3151 bpf_output__fprintf(trace, sample);
3152 } else if (evsel->tp_format) {
3153 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
3154 trace__fprintf_sys_enter(trace, evsel, sample)) {
3155 if (trace->libtraceevent_print) {
3156 event_format__fprintf(evsel->tp_format, sample->cpu,
3157 sample->raw_data, sample->raw_size,
3158 trace->output);
3159 } else {
3160 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
3161 }
3162 }
3163 }
3164
3165newline:
3166 fprintf(trace->output, ")\n");
3167
3168 if (callchain_ret > 0)
3169 trace__fprintf_callchain(trace, sample);
3170 else if (callchain_ret < 0)
3171 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
3172
3173 ++trace->nr_events_printed;
3174
3175 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
3176 evsel__disable(evsel);
3177 evsel__close(evsel);
3178 }
3179out:
3180 thread__put(thread);
3181 return 0;
3182}
3183
3184static void print_location(FILE *f, struct perf_sample *sample,
3185 struct addr_location *al,
3186 bool print_dso, bool print_sym)
3187{
3188
3189 if ((verbose > 0 || print_dso) && al->map)
3190 fprintf(f, "%s@", dso__long_name(map__dso(al->map)));
3191
3192 if ((verbose > 0 || print_sym) && al->sym)
3193 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
3194 al->addr - al->sym->start);
3195 else if (al->map)
3196 fprintf(f, "0x%" PRIx64, al->addr);
3197 else
3198 fprintf(f, "0x%" PRIx64, sample->addr);
3199}
3200
3201static int trace__pgfault(struct trace *trace,
3202 struct evsel *evsel,
3203 union perf_event *event __maybe_unused,
3204 struct perf_sample *sample)
3205{
3206 struct thread *thread;
3207 struct addr_location al;
3208 char map_type = 'd';
3209 struct thread_trace *ttrace;
3210 int err = -1;
3211 int callchain_ret = 0;
3212
3213 addr_location__init(&al);
3214 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3215
3216 if (sample->callchain) {
3217 struct callchain_cursor *cursor = get_tls_callchain_cursor();
3218
3219 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
3220 if (callchain_ret == 0) {
3221 if (cursor->nr < trace->min_stack)
3222 goto out_put;
3223 callchain_ret = 1;
3224 }
3225 }
3226
3227 ttrace = thread__trace(thread, trace->output);
3228 if (ttrace == NULL)
3229 goto out_put;
3230
3231 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
3232 ttrace->pfmaj++;
3233 else
3234 ttrace->pfmin++;
3235
3236 if (trace->summary_only)
3237 goto out;
3238
3239 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
3240
3241 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
3242
3243 fprintf(trace->output, "%sfault [",
3244 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
3245 "maj" : "min");
3246
3247 print_location(trace->output, sample, &al, false, true);
3248
3249 fprintf(trace->output, "] => ");
3250
3251 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
3252
3253 if (!al.map) {
3254 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
3255
3256 if (al.map)
3257 map_type = 'x';
3258 else
3259 map_type = '?';
3260 }
3261
3262 print_location(trace->output, sample, &al, true, false);
3263
3264 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
3265
3266 if (callchain_ret > 0)
3267 trace__fprintf_callchain(trace, sample);
3268 else if (callchain_ret < 0)
3269 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
3270
3271 ++trace->nr_events_printed;
3272out:
3273 err = 0;
3274out_put:
3275 thread__put(thread);
3276 addr_location__exit(&al);
3277 return err;
3278}
3279
3280static void trace__set_base_time(struct trace *trace,
3281 struct evsel *evsel,
3282 struct perf_sample *sample)
3283{
3284 /*
3285 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
3286 * and don't use sample->time unconditionally, we may end up having
3287 * some other event in the future without PERF_SAMPLE_TIME for good
3288 * reason, i.e. we may not be interested in its timestamps, just in
3289 * it taking place, picking some piece of information when it
3290 * appears in our event stream (vfs_getname comes to mind).
3291 */
3292 if (trace->base_time == 0 && !trace->full_time &&
3293 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
3294 trace->base_time = sample->time;
3295}
3296
3297static int trace__process_sample(const struct perf_tool *tool,
3298 union perf_event *event,
3299 struct perf_sample *sample,
3300 struct evsel *evsel,
3301 struct machine *machine __maybe_unused)
3302{
3303 struct trace *trace = container_of(tool, struct trace, tool);
3304 struct thread *thread;
3305 int err = 0;
3306
3307 tracepoint_handler handler = evsel->handler;
3308
3309 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3310 if (thread && thread__is_filtered(thread))
3311 goto out;
3312
3313 trace__set_base_time(trace, evsel, sample);
3314
3315 if (handler) {
3316 ++trace->nr_events;
3317 handler(trace, evsel, event, sample);
3318 }
3319out:
3320 thread__put(thread);
3321 return err;
3322}
3323
3324static int trace__record(struct trace *trace, int argc, const char **argv)
3325{
3326 unsigned int rec_argc, i, j;
3327 const char **rec_argv;
3328 const char * const record_args[] = {
3329 "record",
3330 "-R",
3331 "-m", "1024",
3332 "-c", "1",
3333 };
3334 pid_t pid = getpid();
3335 char *filter = asprintf__tp_filter_pids(1, &pid);
3336 const char * const sc_args[] = { "-e", };
3337 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
3338 const char * const majpf_args[] = { "-e", "major-faults" };
3339 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
3340 const char * const minpf_args[] = { "-e", "minor-faults" };
3341 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
3342 int err = -1;
3343
3344 /* +3 is for the event string below and the pid filter */
3345 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3346 majpf_args_nr + minpf_args_nr + argc;
3347 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3348
3349 if (rec_argv == NULL || filter == NULL)
3350 goto out_free;
3351
3352 j = 0;
3353 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3354 rec_argv[j++] = record_args[i];
3355
3356 if (trace->trace_syscalls) {
3357 for (i = 0; i < sc_args_nr; i++)
3358 rec_argv[j++] = sc_args[i];
3359
3360 /* event string may be different for older kernels - e.g., RHEL6 */
3361 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3362 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3363 else if (is_valid_tracepoint("syscalls:sys_enter"))
3364 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3365 else {
3366 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3367 goto out_free;
3368 }
3369 }
3370
3371 rec_argv[j++] = "--filter";
3372 rec_argv[j++] = filter;
3373
3374 if (trace->trace_pgfaults & TRACE_PFMAJ)
3375 for (i = 0; i < majpf_args_nr; i++)
3376 rec_argv[j++] = majpf_args[i];
3377
3378 if (trace->trace_pgfaults & TRACE_PFMIN)
3379 for (i = 0; i < minpf_args_nr; i++)
3380 rec_argv[j++] = minpf_args[i];
3381
3382 for (i = 0; i < (unsigned int)argc; i++)
3383 rec_argv[j++] = argv[i];
3384
3385 err = cmd_record(j, rec_argv);
3386out_free:
3387 free(filter);
3388 free(rec_argv);
3389 return err;
3390}
3391
3392static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3393
3394static bool evlist__add_vfs_getname(struct evlist *evlist)
3395{
3396 bool found = false;
3397 struct evsel *evsel, *tmp;
3398 struct parse_events_error err;
3399 int ret;
3400
3401 parse_events_error__init(&err);
3402 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3403 parse_events_error__exit(&err);
3404 if (ret)
3405 return false;
3406
3407 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3408 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3409 continue;
3410
3411 if (evsel__field(evsel, "pathname")) {
3412 evsel->handler = trace__vfs_getname;
3413 found = true;
3414 continue;
3415 }
3416
3417 list_del_init(&evsel->core.node);
3418 evsel->evlist = NULL;
3419 evsel__delete(evsel);
3420 }
3421
3422 return found;
3423}
3424
3425static struct evsel *evsel__new_pgfault(u64 config)
3426{
3427 struct evsel *evsel;
3428 struct perf_event_attr attr = {
3429 .type = PERF_TYPE_SOFTWARE,
3430 .mmap_data = 1,
3431 };
3432
3433 attr.config = config;
3434 attr.sample_period = 1;
3435
3436 event_attr_init(&attr);
3437
3438 evsel = evsel__new(&attr);
3439 if (evsel)
3440 evsel->handler = trace__pgfault;
3441
3442 return evsel;
3443}
3444
3445static void evlist__free_syscall_tp_fields(struct evlist *evlist)
3446{
3447 struct evsel *evsel;
3448
3449 evlist__for_each_entry(evlist, evsel) {
3450 evsel_trace__delete(evsel->priv);
3451 evsel->priv = NULL;
3452 }
3453}
3454
3455static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3456{
3457 const u32 type = event->header.type;
3458 struct evsel *evsel;
3459
3460 if (type != PERF_RECORD_SAMPLE) {
3461 trace__process_event(trace, trace->host, event, sample);
3462 return;
3463 }
3464
3465 evsel = evlist__id2evsel(trace->evlist, sample->id);
3466 if (evsel == NULL) {
3467 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3468 return;
3469 }
3470
3471 if (evswitch__discard(&trace->evswitch, evsel))
3472 return;
3473
3474 trace__set_base_time(trace, evsel, sample);
3475
3476 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3477 sample->raw_data == NULL) {
3478 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3479 evsel__name(evsel), sample->tid,
3480 sample->cpu, sample->raw_size);
3481 } else {
3482 tracepoint_handler handler = evsel->handler;
3483 handler(trace, evsel, event, sample);
3484 }
3485
3486 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3487 interrupted = true;
3488}
3489
3490static int trace__add_syscall_newtp(struct trace *trace)
3491{
3492 int ret = -1;
3493 struct evlist *evlist = trace->evlist;
3494 struct evsel *sys_enter, *sys_exit;
3495
3496 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3497 if (sys_enter == NULL)
3498 goto out;
3499
3500 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3501 goto out_delete_sys_enter;
3502
3503 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3504 if (sys_exit == NULL)
3505 goto out_delete_sys_enter;
3506
3507 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3508 goto out_delete_sys_exit;
3509
3510 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3511 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3512
3513 evlist__add(evlist, sys_enter);
3514 evlist__add(evlist, sys_exit);
3515
3516 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3517 /*
3518 * We're interested only in the user space callchain
3519 * leading to the syscall, allow overriding that for
3520 * debugging reasons using --kernel_syscall_callchains
3521 */
3522 sys_exit->core.attr.exclude_callchain_kernel = 1;
3523 }
3524
3525 trace->syscalls.events.sys_enter = sys_enter;
3526 trace->syscalls.events.sys_exit = sys_exit;
3527
3528 ret = 0;
3529out:
3530 return ret;
3531
3532out_delete_sys_exit:
3533 evsel__delete_priv(sys_exit);
3534out_delete_sys_enter:
3535 evsel__delete_priv(sys_enter);
3536 goto out;
3537}
3538
3539static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3540{
3541 int err = -1;
3542 struct evsel *sys_exit;
3543 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3544 trace->ev_qualifier_ids.nr,
3545 trace->ev_qualifier_ids.entries);
3546
3547 if (filter == NULL)
3548 goto out_enomem;
3549
3550 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3551 sys_exit = trace->syscalls.events.sys_exit;
3552 err = evsel__append_tp_filter(sys_exit, filter);
3553 }
3554
3555 free(filter);
3556out:
3557 return err;
3558out_enomem:
3559 errno = ENOMEM;
3560 goto out;
3561}
3562
3563#ifdef HAVE_BPF_SKEL
3564static int syscall_arg_fmt__cache_btf_struct(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type)
3565{
3566 int id;
3567
3568 if (arg_fmt->type != NULL)
3569 return -1;
3570
3571 id = btf__find_by_name(btf, type);
3572 if (id < 0)
3573 return -1;
3574
3575 arg_fmt->type = btf__type_by_id(btf, id);
3576 arg_fmt->type_id = id;
3577
3578 return 0;
3579}
3580
3581static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3582{
3583 struct bpf_program *pos, *prog = NULL;
3584 const char *sec_name;
3585
3586 if (trace->skel->obj == NULL)
3587 return NULL;
3588
3589 bpf_object__for_each_program(pos, trace->skel->obj) {
3590 sec_name = bpf_program__section_name(pos);
3591 if (sec_name && !strcmp(sec_name, name)) {
3592 prog = pos;
3593 break;
3594 }
3595 }
3596
3597 return prog;
3598}
3599
3600static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3601 const char *prog_name, const char *type)
3602{
3603 struct bpf_program *prog;
3604
3605 if (prog_name == NULL) {
3606 char default_prog_name[256];
3607 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name);
3608 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3609 if (prog != NULL)
3610 goto out_found;
3611 if (sc->fmt && sc->fmt->alias) {
3612 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias);
3613 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3614 if (prog != NULL)
3615 goto out_found;
3616 }
3617 goto out_unaugmented;
3618 }
3619
3620 prog = trace__find_bpf_program_by_title(trace, prog_name);
3621
3622 if (prog != NULL) {
3623out_found:
3624 return prog;
3625 }
3626
3627 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3628 prog_name, type, sc->name);
3629out_unaugmented:
3630 return trace->skel->progs.syscall_unaugmented;
3631}
3632
3633static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3634{
3635 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3636
3637 if (sc == NULL)
3638 return;
3639
3640 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3641 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3642}
3643
3644static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3645{
3646 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3647 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3648}
3649
3650static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3651{
3652 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3653 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3654}
3655
3656static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int key, unsigned int *beauty_array)
3657{
3658 struct tep_format_field *field;
3659 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3660 const struct btf_type *bt;
3661 char *struct_offset, *tmp, name[32];
3662 bool can_augment = false;
3663 int i, cnt;
3664
3665 if (sc == NULL)
3666 return -1;
3667
3668 trace__load_vmlinux_btf(trace);
3669 if (trace->btf == NULL)
3670 return -1;
3671
3672 for (i = 0, field = sc->args; field; ++i, field = field->next) {
3673 // XXX We're only collecting pointer payloads _from_ user space
3674 if (!sc->arg_fmt[i].from_user)
3675 continue;
3676
3677 struct_offset = strstr(field->type, "struct ");
3678 if (struct_offset == NULL)
3679 struct_offset = strstr(field->type, "union ");
3680 else
3681 struct_offset++; // "union" is shorter
3682
3683 if (field->flags & TEP_FIELD_IS_POINTER && struct_offset) { /* struct or union (think BPF's attr arg) */
3684 struct_offset += 6;
3685
3686 /* for 'struct foo *', we only want 'foo' */
3687 for (tmp = struct_offset, cnt = 0; *tmp != ' ' && *tmp != '\0'; ++tmp, ++cnt) {
3688 }
3689
3690 strncpy(name, struct_offset, cnt);
3691 name[cnt] = '\0';
3692
3693 /* cache struct's btf_type and type_id */
3694 if (syscall_arg_fmt__cache_btf_struct(&sc->arg_fmt[i], trace->btf, name))
3695 continue;
3696
3697 bt = sc->arg_fmt[i].type;
3698 beauty_array[i] = bt->size;
3699 can_augment = true;
3700 } else if (field->flags & TEP_FIELD_IS_POINTER && /* string */
3701 strcmp(field->type, "const char *") == 0 &&
3702 (strstr(field->name, "name") ||
3703 strstr(field->name, "path") ||
3704 strstr(field->name, "file") ||
3705 strstr(field->name, "root") ||
3706 strstr(field->name, "key") ||
3707 strstr(field->name, "special") ||
3708 strstr(field->name, "type") ||
3709 strstr(field->name, "description"))) {
3710 beauty_array[i] = 1;
3711 can_augment = true;
3712 } else if (field->flags & TEP_FIELD_IS_POINTER && /* buffer */
3713 strstr(field->type, "char *") &&
3714 (strstr(field->name, "buf") ||
3715 strstr(field->name, "val") ||
3716 strstr(field->name, "msg"))) {
3717 int j;
3718 struct tep_format_field *field_tmp;
3719
3720 /* find the size of the buffer that appears in pairs with buf */
3721 for (j = 0, field_tmp = sc->args; field_tmp; ++j, field_tmp = field_tmp->next) {
3722 if (!(field_tmp->flags & TEP_FIELD_IS_POINTER) && /* only integers */
3723 (strstr(field_tmp->name, "count") ||
3724 strstr(field_tmp->name, "siz") || /* size, bufsiz */
3725 (strstr(field_tmp->name, "len") && strcmp(field_tmp->name, "filename")))) {
3726 /* filename's got 'len' in it, we don't want that */
3727 beauty_array[i] = -(j + 1);
3728 can_augment = true;
3729 break;
3730 }
3731 }
3732 }
3733 }
3734
3735 if (can_augment)
3736 return 0;
3737
3738 return -1;
3739}
3740
3741static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3742{
3743 struct tep_format_field *field, *candidate_field;
3744 /*
3745 * We're only interested in syscalls that have a pointer:
3746 */
3747 for (field = sc->args; field; field = field->next) {
3748 if (field->flags & TEP_FIELD_IS_POINTER)
3749 goto try_to_find_pair;
3750 }
3751
3752 return NULL;
3753
3754try_to_find_pair:
3755 for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
3756 int id = syscalltbl__id_at_idx(trace->sctbl, i);
3757 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3758 struct bpf_program *pair_prog;
3759 bool is_candidate = false;
3760
3761 if (pair == NULL || pair == sc ||
3762 pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
3763 continue;
3764
3765 for (field = sc->args, candidate_field = pair->args;
3766 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3767 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3768 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3769
3770 if (is_pointer) {
3771 if (!candidate_is_pointer) {
3772 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3773 continue;
3774 }
3775 } else {
3776 if (candidate_is_pointer) {
3777 // The candidate might copy a pointer we don't have, skip it.
3778 goto next_candidate;
3779 }
3780 continue;
3781 }
3782
3783 if (strcmp(field->type, candidate_field->type))
3784 goto next_candidate;
3785
3786 /*
3787 * This is limited in the BPF program but sys_write
3788 * uses "const char *" for its "buf" arg so we need to
3789 * use some heuristic that is kinda future proof...
3790 */
3791 if (strcmp(field->type, "const char *") == 0 &&
3792 !(strstr(field->name, "name") ||
3793 strstr(field->name, "path") ||
3794 strstr(field->name, "file") ||
3795 strstr(field->name, "root") ||
3796 strstr(field->name, "description")))
3797 goto next_candidate;
3798
3799 is_candidate = true;
3800 }
3801
3802 if (!is_candidate)
3803 goto next_candidate;
3804
3805 /*
3806 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3807 * then it may be collecting that and we then can't use it, as it would collect
3808 * more than what is common to the two syscalls.
3809 */
3810 if (candidate_field) {
3811 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3812 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3813 goto next_candidate;
3814 }
3815
3816 pair_prog = pair->bpf_prog.sys_enter;
3817 /*
3818 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3819 * have been searched for, so search it here and if it returns the
3820 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3821 * program for a filtered syscall on a non-filtered one.
3822 *
3823 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3824 * useful for "renameat2".
3825 */
3826 if (pair_prog == NULL) {
3827 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3828 if (pair_prog == trace->skel->progs.syscall_unaugmented)
3829 goto next_candidate;
3830 }
3831
3832 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3833 return pair_prog;
3834 next_candidate:
3835 continue;
3836 }
3837
3838 return NULL;
3839}
3840
3841static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3842{
3843 int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter);
3844 int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit);
3845 int beauty_map_fd = bpf_map__fd(trace->skel->maps.beauty_map_enter);
3846 int err = 0;
3847 unsigned int beauty_array[6];
3848
3849 for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
3850 int prog_fd, key = syscalltbl__id_at_idx(trace->sctbl, i);
3851
3852 if (!trace__syscall_enabled(trace, key))
3853 continue;
3854
3855 trace__init_syscall_bpf_progs(trace, key);
3856
3857 // It'll get at least the "!raw_syscalls:unaugmented"
3858 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3859 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3860 if (err)
3861 break;
3862 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3863 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3864 if (err)
3865 break;
3866
3867 /* use beauty_map to tell BPF how many bytes to collect, set beauty_map's value here */
3868 memset(beauty_array, 0, sizeof(beauty_array));
3869 err = trace__bpf_sys_enter_beauty_map(trace, key, (unsigned int *)beauty_array);
3870 if (err)
3871 continue;
3872 err = bpf_map_update_elem(beauty_map_fd, &key, beauty_array, BPF_ANY);
3873 if (err)
3874 break;
3875 }
3876
3877 /*
3878 * Now lets do a second pass looking for enabled syscalls without
3879 * an augmenter that have a signature that is a superset of another
3880 * syscall with an augmenter so that we can auto-reuse it.
3881 *
3882 * I.e. if we have an augmenter for the "open" syscall that has
3883 * this signature:
3884 *
3885 * int open(const char *pathname, int flags, mode_t mode);
3886 *
3887 * I.e. that will collect just the first string argument, then we
3888 * can reuse it for the 'creat' syscall, that has this signature:
3889 *
3890 * int creat(const char *pathname, mode_t mode);
3891 *
3892 * and for:
3893 *
3894 * int stat(const char *pathname, struct stat *statbuf);
3895 * int lstat(const char *pathname, struct stat *statbuf);
3896 *
3897 * Because the 'open' augmenter will collect the first arg as a string,
3898 * and leave alone all the other args, which already helps with
3899 * beautifying 'stat' and 'lstat''s pathname arg.
3900 *
3901 * Then, in time, when 'stat' gets an augmenter that collects both
3902 * first and second arg (this one on the raw_syscalls:sys_exit prog
3903 * array tail call, then that one will be used.
3904 */
3905 for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
3906 int key = syscalltbl__id_at_idx(trace->sctbl, i);
3907 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3908 struct bpf_program *pair_prog;
3909 int prog_fd;
3910
3911 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3912 continue;
3913
3914 /*
3915 * For now we're just reusing the sys_enter prog, and if it
3916 * already has an augmenter, we don't need to find one.
3917 */
3918 if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented)
3919 continue;
3920
3921 /*
3922 * Look at all the other syscalls for one that has a signature
3923 * that is close enough that we can share:
3924 */
3925 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3926 if (pair_prog == NULL)
3927 continue;
3928
3929 sc->bpf_prog.sys_enter = pair_prog;
3930
3931 /*
3932 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3933 * with the fd for the program we're reusing:
3934 */
3935 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3936 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3937 if (err)
3938 break;
3939 }
3940
3941 return err;
3942}
3943#endif // HAVE_BPF_SKEL
3944
3945static int trace__set_ev_qualifier_filter(struct trace *trace)
3946{
3947 if (trace->syscalls.events.sys_enter)
3948 return trace__set_ev_qualifier_tp_filter(trace);
3949 return 0;
3950}
3951
3952static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3953 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3954{
3955 int err = 0;
3956#ifdef HAVE_LIBBPF_SUPPORT
3957 bool value = true;
3958 int map_fd = bpf_map__fd(map);
3959 size_t i;
3960
3961 for (i = 0; i < npids; ++i) {
3962 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3963 if (err)
3964 break;
3965 }
3966#endif
3967 return err;
3968}
3969
3970static int trace__set_filter_loop_pids(struct trace *trace)
3971{
3972 unsigned int nr = 1, err;
3973 pid_t pids[32] = {
3974 getpid(),
3975 };
3976 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3977
3978 while (thread && nr < ARRAY_SIZE(pids)) {
3979 struct thread *parent = machine__find_thread(trace->host,
3980 thread__ppid(thread),
3981 thread__ppid(thread));
3982
3983 if (parent == NULL)
3984 break;
3985
3986 if (!strcmp(thread__comm_str(parent), "sshd") ||
3987 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3988 pids[nr++] = thread__tid(parent);
3989 break;
3990 }
3991 thread = parent;
3992 }
3993
3994 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3995 if (!err && trace->filter_pids.map)
3996 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3997
3998 return err;
3999}
4000
4001static int trace__set_filter_pids(struct trace *trace)
4002{
4003 int err = 0;
4004 /*
4005 * Better not use !target__has_task() here because we need to cover the
4006 * case where no threads were specified in the command line, but a
4007 * workload was, and in that case we will fill in the thread_map when
4008 * we fork the workload in evlist__prepare_workload.
4009 */
4010 if (trace->filter_pids.nr > 0) {
4011 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
4012 trace->filter_pids.entries);
4013 if (!err && trace->filter_pids.map) {
4014 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
4015 trace->filter_pids.entries);
4016 }
4017 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
4018 err = trace__set_filter_loop_pids(trace);
4019 }
4020
4021 return err;
4022}
4023
4024static int __trace__deliver_event(struct trace *trace, union perf_event *event)
4025{
4026 struct evlist *evlist = trace->evlist;
4027 struct perf_sample sample;
4028 int err = evlist__parse_sample(evlist, event, &sample);
4029
4030 if (err)
4031 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
4032 else
4033 trace__handle_event(trace, event, &sample);
4034
4035 return 0;
4036}
4037
4038static int __trace__flush_events(struct trace *trace)
4039{
4040 u64 first = ordered_events__first_time(&trace->oe.data);
4041 u64 flush = trace->oe.last - NSEC_PER_SEC;
4042
4043 /* Is there some thing to flush.. */
4044 if (first && first < flush)
4045 return ordered_events__flush_time(&trace->oe.data, flush);
4046
4047 return 0;
4048}
4049
4050static int trace__flush_events(struct trace *trace)
4051{
4052 return !trace->sort_events ? 0 : __trace__flush_events(trace);
4053}
4054
4055static int trace__deliver_event(struct trace *trace, union perf_event *event)
4056{
4057 int err;
4058
4059 if (!trace->sort_events)
4060 return __trace__deliver_event(trace, event);
4061
4062 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
4063 if (err && err != -1)
4064 return err;
4065
4066 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL);
4067 if (err)
4068 return err;
4069
4070 return trace__flush_events(trace);
4071}
4072
4073static int ordered_events__deliver_event(struct ordered_events *oe,
4074 struct ordered_event *event)
4075{
4076 struct trace *trace = container_of(oe, struct trace, oe.data);
4077
4078 return __trace__deliver_event(trace, event->event);
4079}
4080
4081static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg,
4082 char **type)
4083{
4084 struct tep_format_field *field;
4085 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
4086
4087 if (evsel->tp_format == NULL || fmt == NULL)
4088 return NULL;
4089
4090 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
4091 if (strcmp(field->name, arg) == 0) {
4092 *type = field->type;
4093 return fmt;
4094 }
4095
4096 return NULL;
4097}
4098
4099static int trace__expand_filter(struct trace *trace, struct evsel *evsel)
4100{
4101 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
4102
4103 while ((tok = strpbrk(left, "=<>!")) != NULL) {
4104 char *right = tok + 1, *right_end;
4105
4106 if (*right == '=')
4107 ++right;
4108
4109 while (isspace(*right))
4110 ++right;
4111
4112 if (*right == '\0')
4113 break;
4114
4115 while (!isalpha(*left))
4116 if (++left == tok) {
4117 /*
4118 * Bail out, can't find the name of the argument that is being
4119 * used in the filter, let it try to set this filter, will fail later.
4120 */
4121 return 0;
4122 }
4123
4124 right_end = right + 1;
4125 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
4126 ++right_end;
4127
4128 if (isalpha(*right)) {
4129 struct syscall_arg_fmt *fmt;
4130 int left_size = tok - left,
4131 right_size = right_end - right;
4132 char arg[128], *type;
4133
4134 while (isspace(left[left_size - 1]))
4135 --left_size;
4136
4137 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
4138
4139 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg, &type);
4140 if (fmt == NULL) {
4141 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
4142 arg, evsel->name, evsel->filter);
4143 return -1;
4144 }
4145
4146 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
4147 arg, (int)(right - tok), tok, right_size, right);
4148
4149 if (fmt->strtoul) {
4150 u64 val;
4151 struct syscall_arg syscall_arg = {
4152 .trace = trace,
4153 .fmt = fmt,
4154 .type_name = type,
4155 .parm = fmt->parm,
4156 };
4157
4158 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
4159 char *n, expansion[19];
4160 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
4161 int expansion_offset = right - new_filter;
4162
4163 pr_debug("%s", expansion);
4164
4165 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
4166 pr_debug(" out of memory!\n");
4167 free(new_filter);
4168 return -1;
4169 }
4170 if (new_filter != evsel->filter)
4171 free(new_filter);
4172 left = n + expansion_offset + expansion_lenght;
4173 new_filter = n;
4174 } else {
4175 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
4176 right_size, right, arg, evsel->name, evsel->filter);
4177 return -1;
4178 }
4179 } else {
4180 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
4181 arg, evsel->name, evsel->filter);
4182 return -1;
4183 }
4184
4185 pr_debug("\n");
4186 } else {
4187 left = right_end;
4188 }
4189 }
4190
4191 if (new_filter != evsel->filter) {
4192 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
4193 evsel__set_filter(evsel, new_filter);
4194 free(new_filter);
4195 }
4196
4197 return 0;
4198}
4199
4200static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
4201{
4202 struct evlist *evlist = trace->evlist;
4203 struct evsel *evsel;
4204
4205 evlist__for_each_entry(evlist, evsel) {
4206 if (evsel->filter == NULL)
4207 continue;
4208
4209 if (trace__expand_filter(trace, evsel)) {
4210 *err_evsel = evsel;
4211 return -1;
4212 }
4213 }
4214
4215 return 0;
4216}
4217
4218static int trace__run(struct trace *trace, int argc, const char **argv)
4219{
4220 struct evlist *evlist = trace->evlist;
4221 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
4222 int err = -1, i;
4223 unsigned long before;
4224 const bool forks = argc > 0;
4225 bool draining = false;
4226
4227 trace->live = true;
4228
4229 if (!trace->raw_augmented_syscalls) {
4230 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
4231 goto out_error_raw_syscalls;
4232
4233 if (trace->trace_syscalls)
4234 trace->vfs_getname = evlist__add_vfs_getname(evlist);
4235 }
4236
4237 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
4238 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
4239 if (pgfault_maj == NULL)
4240 goto out_error_mem;
4241 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
4242 evlist__add(evlist, pgfault_maj);
4243 }
4244
4245 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
4246 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
4247 if (pgfault_min == NULL)
4248 goto out_error_mem;
4249 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
4250 evlist__add(evlist, pgfault_min);
4251 }
4252
4253 /* Enable ignoring missing threads when -u/-p option is defined. */
4254 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid;
4255
4256 if (trace->sched &&
4257 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
4258 goto out_error_sched_stat_runtime;
4259 /*
4260 * If a global cgroup was set, apply it to all the events without an
4261 * explicit cgroup. I.e.:
4262 *
4263 * trace -G A -e sched:*switch
4264 *
4265 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
4266 * _and_ sched:sched_switch to the 'A' cgroup, while:
4267 *
4268 * trace -e sched:*switch -G A
4269 *
4270 * will only set the sched:sched_switch event to the 'A' cgroup, all the
4271 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
4272 * a cgroup (on the root cgroup, sys wide, etc).
4273 *
4274 * Multiple cgroups:
4275 *
4276 * trace -G A -e sched:*switch -G B
4277 *
4278 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
4279 * to the 'B' cgroup.
4280 *
4281 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
4282 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
4283 */
4284 if (trace->cgroup)
4285 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
4286
4287 err = evlist__create_maps(evlist, &trace->opts.target);
4288 if (err < 0) {
4289 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
4290 goto out_delete_evlist;
4291 }
4292
4293 err = trace__symbols_init(trace, evlist);
4294 if (err < 0) {
4295 fprintf(trace->output, "Problems initializing symbol libraries!\n");
4296 goto out_delete_evlist;
4297 }
4298
4299 evlist__config(evlist, &trace->opts, &callchain_param);
4300
4301 if (forks) {
4302 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
4303 if (err < 0) {
4304 fprintf(trace->output, "Couldn't run the workload!\n");
4305 goto out_delete_evlist;
4306 }
4307 workload_pid = evlist->workload.pid;
4308 }
4309
4310 err = evlist__open(evlist);
4311 if (err < 0)
4312 goto out_error_open;
4313#ifdef HAVE_BPF_SKEL
4314 if (trace->syscalls.events.bpf_output) {
4315 struct perf_cpu cpu;
4316
4317 /*
4318 * Set up the __augmented_syscalls__ BPF map to hold for each
4319 * CPU the bpf-output event's file descriptor.
4320 */
4321 perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) {
4322 bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__,
4323 &cpu.cpu, sizeof(int),
4324 xyarray__entry(trace->syscalls.events.bpf_output->core.fd,
4325 cpu.cpu, 0),
4326 sizeof(__u32), BPF_ANY);
4327 }
4328 }
4329
4330 if (trace->skel)
4331 trace->filter_pids.map = trace->skel->maps.pids_filtered;
4332#endif
4333 err = trace__set_filter_pids(trace);
4334 if (err < 0)
4335 goto out_error_mem;
4336
4337#ifdef HAVE_BPF_SKEL
4338 if (trace->skel && trace->skel->progs.sys_enter)
4339 trace__init_syscalls_bpf_prog_array_maps(trace);
4340#endif
4341
4342 if (trace->ev_qualifier_ids.nr > 0) {
4343 err = trace__set_ev_qualifier_filter(trace);
4344 if (err < 0)
4345 goto out_errno;
4346
4347 if (trace->syscalls.events.sys_exit) {
4348 pr_debug("event qualifier tracepoint filter: %s\n",
4349 trace->syscalls.events.sys_exit->filter);
4350 }
4351 }
4352
4353 /*
4354 * If the "close" syscall is not traced, then we will not have the
4355 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
4356 * fd->pathname table and were ending up showing the last value set by
4357 * syscalls opening a pathname and associating it with a descriptor or
4358 * reading it from /proc/pid/fd/ in cases where that doesn't make
4359 * sense.
4360 *
4361 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
4362 * not in use.
4363 */
4364 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4365
4366 err = trace__expand_filters(trace, &evsel);
4367 if (err)
4368 goto out_delete_evlist;
4369 err = evlist__apply_filters(evlist, &evsel, &trace->opts.target);
4370 if (err < 0)
4371 goto out_error_apply_filters;
4372
4373 err = evlist__mmap(evlist, trace->opts.mmap_pages);
4374 if (err < 0)
4375 goto out_error_mmap;
4376
4377 if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay)
4378 evlist__enable(evlist);
4379
4380 if (forks)
4381 evlist__start_workload(evlist);
4382
4383 if (trace->opts.target.initial_delay) {
4384 usleep(trace->opts.target.initial_delay * 1000);
4385 evlist__enable(evlist);
4386 }
4387
4388 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4389 perf_thread_map__nr(evlist->core.threads) > 1 ||
4390 evlist__first(evlist)->core.attr.inherit;
4391
4392 /*
4393 * Now that we already used evsel->core.attr to ask the kernel to setup the
4394 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4395 * trace__resolve_callchain(), allowing per-event max-stack settings
4396 * to override an explicitly set --max-stack global setting.
4397 */
4398 evlist__for_each_entry(evlist, evsel) {
4399 if (evsel__has_callchain(evsel) &&
4400 evsel->core.attr.sample_max_stack == 0)
4401 evsel->core.attr.sample_max_stack = trace->max_stack;
4402 }
4403again:
4404 before = trace->nr_events;
4405
4406 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4407 union perf_event *event;
4408 struct mmap *md;
4409
4410 md = &evlist->mmap[i];
4411 if (perf_mmap__read_init(&md->core) < 0)
4412 continue;
4413
4414 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4415 ++trace->nr_events;
4416
4417 err = trace__deliver_event(trace, event);
4418 if (err)
4419 goto out_disable;
4420
4421 perf_mmap__consume(&md->core);
4422
4423 if (interrupted)
4424 goto out_disable;
4425
4426 if (done && !draining) {
4427 evlist__disable(evlist);
4428 draining = true;
4429 }
4430 }
4431 perf_mmap__read_done(&md->core);
4432 }
4433
4434 if (trace->nr_events == before) {
4435 int timeout = done ? 100 : -1;
4436
4437 if (!draining && evlist__poll(evlist, timeout) > 0) {
4438 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4439 draining = true;
4440
4441 goto again;
4442 } else {
4443 if (trace__flush_events(trace))
4444 goto out_disable;
4445 }
4446 } else {
4447 goto again;
4448 }
4449
4450out_disable:
4451 thread__zput(trace->current);
4452
4453 evlist__disable(evlist);
4454
4455 if (trace->sort_events)
4456 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4457
4458 if (!err) {
4459 if (trace->summary)
4460 trace__fprintf_thread_summary(trace, trace->output);
4461
4462 if (trace->show_tool_stats) {
4463 fprintf(trace->output, "Stats:\n "
4464 " vfs_getname : %" PRIu64 "\n"
4465 " proc_getname: %" PRIu64 "\n",
4466 trace->stats.vfs_getname,
4467 trace->stats.proc_getname);
4468 }
4469 }
4470
4471out_delete_evlist:
4472 trace__symbols__exit(trace);
4473 evlist__free_syscall_tp_fields(evlist);
4474 evlist__delete(evlist);
4475 cgroup__put(trace->cgroup);
4476 trace->evlist = NULL;
4477 trace->live = false;
4478 return err;
4479{
4480 char errbuf[BUFSIZ];
4481
4482out_error_sched_stat_runtime:
4483 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4484 goto out_error;
4485
4486out_error_raw_syscalls:
4487 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4488 goto out_error;
4489
4490out_error_mmap:
4491 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4492 goto out_error;
4493
4494out_error_open:
4495 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4496
4497out_error:
4498 fprintf(trace->output, "%s\n", errbuf);
4499 goto out_delete_evlist;
4500
4501out_error_apply_filters:
4502 fprintf(trace->output,
4503 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4504 evsel->filter, evsel__name(evsel), errno,
4505 str_error_r(errno, errbuf, sizeof(errbuf)));
4506 goto out_delete_evlist;
4507}
4508out_error_mem:
4509 fprintf(trace->output, "Not enough memory to run!\n");
4510 goto out_delete_evlist;
4511
4512out_errno:
4513 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4514 goto out_delete_evlist;
4515}
4516
4517static int trace__replay(struct trace *trace)
4518{
4519 const struct evsel_str_handler handlers[] = {
4520 { "probe:vfs_getname", trace__vfs_getname, },
4521 };
4522 struct perf_data data = {
4523 .path = input_name,
4524 .mode = PERF_DATA_MODE_READ,
4525 .force = trace->force,
4526 };
4527 struct perf_session *session;
4528 struct evsel *evsel;
4529 int err = -1;
4530
4531 trace->tool.sample = trace__process_sample;
4532 trace->tool.mmap = perf_event__process_mmap;
4533 trace->tool.mmap2 = perf_event__process_mmap2;
4534 trace->tool.comm = perf_event__process_comm;
4535 trace->tool.exit = perf_event__process_exit;
4536 trace->tool.fork = perf_event__process_fork;
4537 trace->tool.attr = perf_event__process_attr;
4538 trace->tool.tracing_data = perf_event__process_tracing_data;
4539 trace->tool.build_id = perf_event__process_build_id;
4540 trace->tool.namespaces = perf_event__process_namespaces;
4541
4542 trace->tool.ordered_events = true;
4543 trace->tool.ordering_requires_timestamps = true;
4544
4545 /* add tid to output */
4546 trace->multiple_threads = true;
4547
4548 session = perf_session__new(&data, &trace->tool);
4549 if (IS_ERR(session))
4550 return PTR_ERR(session);
4551
4552 if (trace->opts.target.pid)
4553 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4554
4555 if (trace->opts.target.tid)
4556 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4557
4558 if (symbol__init(&session->header.env) < 0)
4559 goto out;
4560
4561 trace->host = &session->machines.host;
4562
4563 err = perf_session__set_tracepoints_handlers(session, handlers);
4564 if (err)
4565 goto out;
4566
4567 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter");
4568 trace->syscalls.events.sys_enter = evsel;
4569 /* older kernels have syscalls tp versus raw_syscalls */
4570 if (evsel == NULL)
4571 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter");
4572
4573 if (evsel &&
4574 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4575 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4576 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4577 goto out;
4578 }
4579
4580 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit");
4581 trace->syscalls.events.sys_exit = evsel;
4582 if (evsel == NULL)
4583 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit");
4584 if (evsel &&
4585 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4586 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4587 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4588 goto out;
4589 }
4590
4591 evlist__for_each_entry(session->evlist, evsel) {
4592 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4593 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4594 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4595 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4596 evsel->handler = trace__pgfault;
4597 }
4598
4599 setup_pager();
4600
4601 err = perf_session__process_events(session);
4602 if (err)
4603 pr_err("Failed to process events, error %d", err);
4604
4605 else if (trace->summary)
4606 trace__fprintf_thread_summary(trace, trace->output);
4607
4608out:
4609 perf_session__delete(session);
4610
4611 return err;
4612}
4613
4614static size_t trace__fprintf_threads_header(FILE *fp)
4615{
4616 size_t printed;
4617
4618 printed = fprintf(fp, "\n Summary of events:\n\n");
4619
4620 return printed;
4621}
4622
4623DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4624 struct syscall_stats *stats;
4625 double msecs;
4626 int syscall;
4627)
4628{
4629 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4630 struct syscall_stats *stats = source->priv;
4631
4632 entry->syscall = source->i;
4633 entry->stats = stats;
4634 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4635}
4636
4637static size_t thread__dump_stats(struct thread_trace *ttrace,
4638 struct trace *trace, FILE *fp)
4639{
4640 size_t printed = 0;
4641 struct syscall *sc;
4642 struct rb_node *nd;
4643 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4644
4645 if (syscall_stats == NULL)
4646 return 0;
4647
4648 printed += fprintf(fp, "\n");
4649
4650 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4651 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4652 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4653
4654 resort_rb__for_each_entry(nd, syscall_stats) {
4655 struct syscall_stats *stats = syscall_stats_entry->stats;
4656 if (stats) {
4657 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4658 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4659 double avg = avg_stats(&stats->stats);
4660 double pct;
4661 u64 n = (u64)stats->stats.n;
4662
4663 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4664 avg /= NSEC_PER_MSEC;
4665
4666 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4667 printed += fprintf(fp, " %-15s", sc->name);
4668 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4669 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4670 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4671
4672 if (trace->errno_summary && stats->nr_failures) {
4673 int e;
4674
4675 for (e = 0; e < stats->max_errno; ++e) {
4676 if (stats->errnos[e] != 0)
4677 fprintf(fp, "\t\t\t\t%s: %d\n", perf_env__arch_strerrno(trace->host->env, e + 1), stats->errnos[e]);
4678 }
4679 }
4680 }
4681 }
4682
4683 resort_rb__delete(syscall_stats);
4684 printed += fprintf(fp, "\n\n");
4685
4686 return printed;
4687}
4688
4689static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4690{
4691 size_t printed = 0;
4692 struct thread_trace *ttrace = thread__priv(thread);
4693 double ratio;
4694
4695 if (ttrace == NULL)
4696 return 0;
4697
4698 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4699
4700 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread));
4701 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4702 printed += fprintf(fp, "%.1f%%", ratio);
4703 if (ttrace->pfmaj)
4704 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4705 if (ttrace->pfmin)
4706 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4707 if (trace->sched)
4708 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4709 else if (fputc('\n', fp) != EOF)
4710 ++printed;
4711
4712 printed += thread__dump_stats(ttrace, trace, fp);
4713
4714 return printed;
4715}
4716
4717static unsigned long thread__nr_events(struct thread_trace *ttrace)
4718{
4719 return ttrace ? ttrace->nr_events : 0;
4720}
4721
4722static int trace_nr_events_cmp(void *priv __maybe_unused,
4723 const struct list_head *la,
4724 const struct list_head *lb)
4725{
4726 struct thread_list *a = list_entry(la, struct thread_list, list);
4727 struct thread_list *b = list_entry(lb, struct thread_list, list);
4728 unsigned long a_nr_events = thread__nr_events(thread__priv(a->thread));
4729 unsigned long b_nr_events = thread__nr_events(thread__priv(b->thread));
4730
4731 if (a_nr_events != b_nr_events)
4732 return a_nr_events < b_nr_events ? -1 : 1;
4733
4734 /* Identical number of threads, place smaller tids first. */
4735 return thread__tid(a->thread) < thread__tid(b->thread)
4736 ? -1
4737 : (thread__tid(a->thread) > thread__tid(b->thread) ? 1 : 0);
4738}
4739
4740static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4741{
4742 size_t printed = trace__fprintf_threads_header(fp);
4743 LIST_HEAD(threads);
4744
4745 if (machine__thread_list(trace->host, &threads) == 0) {
4746 struct thread_list *pos;
4747
4748 list_sort(NULL, &threads, trace_nr_events_cmp);
4749
4750 list_for_each_entry(pos, &threads, list)
4751 printed += trace__fprintf_thread(fp, pos->thread, trace);
4752 }
4753 thread_list__delete(&threads);
4754 return printed;
4755}
4756
4757static int trace__set_duration(const struct option *opt, const char *str,
4758 int unset __maybe_unused)
4759{
4760 struct trace *trace = opt->value;
4761
4762 trace->duration_filter = atof(str);
4763 return 0;
4764}
4765
4766static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4767 int unset __maybe_unused)
4768{
4769 int ret = -1;
4770 size_t i;
4771 struct trace *trace = opt->value;
4772 /*
4773 * FIXME: introduce a intarray class, plain parse csv and create a
4774 * { int nr, int entries[] } struct...
4775 */
4776 struct intlist *list = intlist__new(str);
4777
4778 if (list == NULL)
4779 return -1;
4780
4781 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4782 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4783
4784 if (trace->filter_pids.entries == NULL)
4785 goto out;
4786
4787 trace->filter_pids.entries[0] = getpid();
4788
4789 for (i = 1; i < trace->filter_pids.nr; ++i)
4790 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4791
4792 intlist__delete(list);
4793 ret = 0;
4794out:
4795 return ret;
4796}
4797
4798static int trace__open_output(struct trace *trace, const char *filename)
4799{
4800 struct stat st;
4801
4802 if (!stat(filename, &st) && st.st_size) {
4803 char oldname[PATH_MAX];
4804
4805 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4806 unlink(oldname);
4807 rename(filename, oldname);
4808 }
4809
4810 trace->output = fopen(filename, "w");
4811
4812 return trace->output == NULL ? -errno : 0;
4813}
4814
4815static int parse_pagefaults(const struct option *opt, const char *str,
4816 int unset __maybe_unused)
4817{
4818 int *trace_pgfaults = opt->value;
4819
4820 if (strcmp(str, "all") == 0)
4821 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4822 else if (strcmp(str, "maj") == 0)
4823 *trace_pgfaults |= TRACE_PFMAJ;
4824 else if (strcmp(str, "min") == 0)
4825 *trace_pgfaults |= TRACE_PFMIN;
4826 else
4827 return -1;
4828
4829 return 0;
4830}
4831
4832static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4833{
4834 struct evsel *evsel;
4835
4836 evlist__for_each_entry(evlist, evsel) {
4837 if (evsel->handler == NULL)
4838 evsel->handler = handler;
4839 }
4840}
4841
4842static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4843{
4844 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4845
4846 if (fmt) {
4847 const struct syscall_fmt *scfmt = syscall_fmt__find(name);
4848
4849 if (scfmt) {
4850 int skip = 0;
4851
4852 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4853 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4854 ++skip;
4855
4856 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4857 }
4858 }
4859}
4860
4861static int evlist__set_syscall_tp_fields(struct evlist *evlist, bool *use_btf)
4862{
4863 struct evsel *evsel;
4864
4865 evlist__for_each_entry(evlist, evsel) {
4866 if (evsel->priv || !evsel->tp_format)
4867 continue;
4868
4869 if (strcmp(evsel->tp_format->system, "syscalls")) {
4870 evsel__init_tp_arg_scnprintf(evsel, use_btf);
4871 continue;
4872 }
4873
4874 if (evsel__init_syscall_tp(evsel))
4875 return -1;
4876
4877 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4878 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4879
4880 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4881 return -1;
4882
4883 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4884 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4885 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4886
4887 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4888 return -1;
4889
4890 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4891 }
4892 }
4893
4894 return 0;
4895}
4896
4897/*
4898 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4899 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4900 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4901 *
4902 * It'd be better to introduce a parse_options() variant that would return a
4903 * list with the terms it didn't match to an event...
4904 */
4905static int trace__parse_events_option(const struct option *opt, const char *str,
4906 int unset __maybe_unused)
4907{
4908 struct trace *trace = (struct trace *)opt->value;
4909 const char *s = str;
4910 char *sep = NULL, *lists[2] = { NULL, NULL, };
4911 int len = strlen(str) + 1, err = -1, list, idx;
4912 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4913 char group_name[PATH_MAX];
4914 const struct syscall_fmt *fmt;
4915
4916 if (strace_groups_dir == NULL)
4917 return -1;
4918
4919 if (*s == '!') {
4920 ++s;
4921 trace->not_ev_qualifier = true;
4922 }
4923
4924 while (1) {
4925 if ((sep = strchr(s, ',')) != NULL)
4926 *sep = '\0';
4927
4928 list = 0;
4929 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4930 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4931 list = 1;
4932 goto do_concat;
4933 }
4934
4935 fmt = syscall_fmt__find_by_alias(s);
4936 if (fmt != NULL) {
4937 list = 1;
4938 s = fmt->name;
4939 } else {
4940 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4941 if (access(group_name, R_OK) == 0)
4942 list = 1;
4943 }
4944do_concat:
4945 if (lists[list]) {
4946 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4947 } else {
4948 lists[list] = malloc(len);
4949 if (lists[list] == NULL)
4950 goto out;
4951 strcpy(lists[list], s);
4952 }
4953
4954 if (!sep)
4955 break;
4956
4957 *sep = ',';
4958 s = sep + 1;
4959 }
4960
4961 if (lists[1] != NULL) {
4962 struct strlist_config slist_config = {
4963 .dirname = strace_groups_dir,
4964 };
4965
4966 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4967 if (trace->ev_qualifier == NULL) {
4968 fputs("Not enough memory to parse event qualifier", trace->output);
4969 goto out;
4970 }
4971
4972 if (trace__validate_ev_qualifier(trace))
4973 goto out;
4974 trace->trace_syscalls = true;
4975 }
4976
4977 err = 0;
4978
4979 if (lists[0]) {
4980 struct parse_events_option_args parse_events_option_args = {
4981 .evlistp = &trace->evlist,
4982 };
4983 struct option o = {
4984 .value = &parse_events_option_args,
4985 };
4986 err = parse_events_option(&o, lists[0], 0);
4987 }
4988out:
4989 free(strace_groups_dir);
4990 free(lists[0]);
4991 free(lists[1]);
4992 if (sep)
4993 *sep = ',';
4994
4995 return err;
4996}
4997
4998static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4999{
5000 struct trace *trace = opt->value;
5001
5002 if (!list_empty(&trace->evlist->core.entries)) {
5003 struct option o = {
5004 .value = &trace->evlist,
5005 };
5006 return parse_cgroups(&o, str, unset);
5007 }
5008 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
5009
5010 return 0;
5011}
5012
5013static int trace__config(const char *var, const char *value, void *arg)
5014{
5015 struct trace *trace = arg;
5016 int err = 0;
5017
5018 if (!strcmp(var, "trace.add_events")) {
5019 trace->perfconfig_events = strdup(value);
5020 if (trace->perfconfig_events == NULL) {
5021 pr_err("Not enough memory for %s\n", "trace.add_events");
5022 return -1;
5023 }
5024 } else if (!strcmp(var, "trace.show_timestamp")) {
5025 trace->show_tstamp = perf_config_bool(var, value);
5026 } else if (!strcmp(var, "trace.show_duration")) {
5027 trace->show_duration = perf_config_bool(var, value);
5028 } else if (!strcmp(var, "trace.show_arg_names")) {
5029 trace->show_arg_names = perf_config_bool(var, value);
5030 if (!trace->show_arg_names)
5031 trace->show_zeros = true;
5032 } else if (!strcmp(var, "trace.show_zeros")) {
5033 bool new_show_zeros = perf_config_bool(var, value);
5034 if (!trace->show_arg_names && !new_show_zeros) {
5035 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
5036 goto out;
5037 }
5038 trace->show_zeros = new_show_zeros;
5039 } else if (!strcmp(var, "trace.show_prefix")) {
5040 trace->show_string_prefix = perf_config_bool(var, value);
5041 } else if (!strcmp(var, "trace.no_inherit")) {
5042 trace->opts.no_inherit = perf_config_bool(var, value);
5043 } else if (!strcmp(var, "trace.args_alignment")) {
5044 int args_alignment = 0;
5045 if (perf_config_int(&args_alignment, var, value) == 0)
5046 trace->args_alignment = args_alignment;
5047 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
5048 if (strcasecmp(value, "libtraceevent") == 0)
5049 trace->libtraceevent_print = true;
5050 else if (strcasecmp(value, "libbeauty") == 0)
5051 trace->libtraceevent_print = false;
5052 }
5053out:
5054 return err;
5055}
5056
5057static void trace__exit(struct trace *trace)
5058{
5059 int i;
5060
5061 strlist__delete(trace->ev_qualifier);
5062 zfree(&trace->ev_qualifier_ids.entries);
5063 if (trace->syscalls.table) {
5064 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
5065 syscall__exit(&trace->syscalls.table[i]);
5066 zfree(&trace->syscalls.table);
5067 }
5068 syscalltbl__delete(trace->sctbl);
5069 zfree(&trace->perfconfig_events);
5070}
5071
5072#ifdef HAVE_BPF_SKEL
5073static int bpf__setup_bpf_output(struct evlist *evlist)
5074{
5075 int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/");
5076
5077 if (err)
5078 pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n");
5079
5080 return err;
5081}
5082#endif
5083
5084int cmd_trace(int argc, const char **argv)
5085{
5086 const char *trace_usage[] = {
5087 "perf trace [<options>] [<command>]",
5088 "perf trace [<options>] -- <command> [<options>]",
5089 "perf trace record [<options>] [<command>]",
5090 "perf trace record [<options>] -- <command> [<options>]",
5091 NULL
5092 };
5093 struct trace trace = {
5094 .opts = {
5095 .target = {
5096 .uid = UINT_MAX,
5097 .uses_mmap = true,
5098 },
5099 .user_freq = UINT_MAX,
5100 .user_interval = ULLONG_MAX,
5101 .no_buffering = true,
5102 .mmap_pages = UINT_MAX,
5103 },
5104 .output = stderr,
5105 .show_comm = true,
5106 .show_tstamp = true,
5107 .show_duration = true,
5108 .show_arg_names = true,
5109 .args_alignment = 70,
5110 .trace_syscalls = false,
5111 .kernel_syscallchains = false,
5112 .max_stack = UINT_MAX,
5113 .max_events = ULONG_MAX,
5114 };
5115 const char *output_name = NULL;
5116 const struct option trace_options[] = {
5117 OPT_CALLBACK('e', "event", &trace, "event",
5118 "event/syscall selector. use 'perf list' to list available events",
5119 trace__parse_events_option),
5120 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
5121 "event filter", parse_filter),
5122 OPT_BOOLEAN(0, "comm", &trace.show_comm,
5123 "show the thread COMM next to its id"),
5124 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
5125 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
5126 trace__parse_events_option),
5127 OPT_STRING('o', "output", &output_name, "file", "output file name"),
5128 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
5129 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
5130 "trace events on existing process id"),
5131 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
5132 "trace events on existing thread id"),
5133 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
5134 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
5135 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
5136 "system-wide collection from all CPUs"),
5137 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
5138 "list of cpus to monitor"),
5139 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
5140 "child tasks do not inherit counters"),
5141 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
5142 "number of mmap data pages", evlist__parse_mmap_pages),
5143 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
5144 "user to profile"),
5145 OPT_CALLBACK(0, "duration", &trace, "float",
5146 "show only events with duration > N.M ms",
5147 trace__set_duration),
5148 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
5149 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
5150 OPT_BOOLEAN('T', "time", &trace.full_time,
5151 "Show full timestamp, not time relative to first start"),
5152 OPT_BOOLEAN(0, "failure", &trace.failure_only,
5153 "Show only syscalls that failed"),
5154 OPT_BOOLEAN('s', "summary", &trace.summary_only,
5155 "Show only syscall summary with statistics"),
5156 OPT_BOOLEAN('S', "with-summary", &trace.summary,
5157 "Show all syscalls and summary with statistics"),
5158 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
5159 "Show errno stats per syscall, use with -s or -S"),
5160 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
5161 "Trace pagefaults", parse_pagefaults, "maj"),
5162 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
5163 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
5164 OPT_CALLBACK(0, "call-graph", &trace.opts,
5165 "record_mode[,record_size]", record_callchain_help,
5166 &record_parse_callchain_opt),
5167 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
5168 "Use libtraceevent to print the tracepoint arguments."),
5169 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
5170 "Show the kernel callchains on the syscall exit path"),
5171 OPT_ULONG(0, "max-events", &trace.max_events,
5172 "Set the maximum number of events to print, exit after that is reached. "),
5173 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
5174 "Set the minimum stack depth when parsing the callchain, "
5175 "anything below the specified depth will be ignored."),
5176 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
5177 "Set the maximum stack depth when parsing the callchain, "
5178 "anything beyond the specified depth will be ignored. "
5179 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
5180 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
5181 "Sort batch of events before processing, use if getting out of order events"),
5182 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
5183 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
5184 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
5185 "per thread proc mmap processing timeout in ms"),
5186 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
5187 trace__parse_cgroups),
5188 OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay,
5189 "ms to wait before starting measurement after program "
5190 "start"),
5191 OPT_BOOLEAN(0, "force-btf", &trace.force_btf, "Prefer btf_dump general pretty printer"
5192 "to customized ones"),
5193 OPTS_EVSWITCH(&trace.evswitch),
5194 OPT_END()
5195 };
5196 bool __maybe_unused max_stack_user_set = true;
5197 bool mmap_pages_user_set = true;
5198 struct evsel *evsel;
5199 const char * const trace_subcommands[] = { "record", NULL };
5200 int err = -1;
5201 char bf[BUFSIZ];
5202 struct sigaction sigchld_act;
5203
5204 signal(SIGSEGV, sighandler_dump_stack);
5205 signal(SIGFPE, sighandler_dump_stack);
5206 signal(SIGINT, sighandler_interrupt);
5207
5208 memset(&sigchld_act, 0, sizeof(sigchld_act));
5209 sigchld_act.sa_flags = SA_SIGINFO;
5210 sigchld_act.sa_sigaction = sighandler_chld;
5211 sigaction(SIGCHLD, &sigchld_act, NULL);
5212
5213 trace.evlist = evlist__new();
5214 trace.sctbl = syscalltbl__new();
5215
5216 if (trace.evlist == NULL || trace.sctbl == NULL) {
5217 pr_err("Not enough memory to run!\n");
5218 err = -ENOMEM;
5219 goto out;
5220 }
5221
5222 /*
5223 * Parsing .perfconfig may entail creating a BPF event, that may need
5224 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
5225 * is too small. This affects just this process, not touching the
5226 * global setting. If it fails we'll get something in 'perf trace -v'
5227 * to help diagnose the problem.
5228 */
5229 rlimit__bump_memlock();
5230
5231 err = perf_config(trace__config, &trace);
5232 if (err)
5233 goto out;
5234
5235 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
5236 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
5237
5238 /*
5239 * Here we already passed thru trace__parse_events_option() and it has
5240 * already figured out if -e syscall_name, if not but if --event
5241 * foo:bar was used, the user is interested _just_ in those, say,
5242 * tracepoint events, not in the strace-like syscall-name-based mode.
5243 *
5244 * This is important because we need to check if strace-like mode is
5245 * needed to decided if we should filter out the eBPF
5246 * __augmented_syscalls__ code, if it is in the mix, say, via
5247 * .perfconfig trace.add_events, and filter those out.
5248 */
5249 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
5250 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
5251 trace.trace_syscalls = true;
5252 }
5253 /*
5254 * Now that we have --verbose figured out, lets see if we need to parse
5255 * events from .perfconfig, so that if those events fail parsing, say some
5256 * BPF program fails, then we'll be able to use --verbose to see what went
5257 * wrong in more detail.
5258 */
5259 if (trace.perfconfig_events != NULL) {
5260 struct parse_events_error parse_err;
5261
5262 parse_events_error__init(&parse_err);
5263 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
5264 if (err)
5265 parse_events_error__print(&parse_err, trace.perfconfig_events);
5266 parse_events_error__exit(&parse_err);
5267 if (err)
5268 goto out;
5269 }
5270
5271 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
5272 usage_with_options_msg(trace_usage, trace_options,
5273 "cgroup monitoring only available in system-wide mode");
5274 }
5275
5276#ifdef HAVE_BPF_SKEL
5277 if (!trace.trace_syscalls)
5278 goto skip_augmentation;
5279
5280 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) {
5281 pr_debug("Syscall augmentation fails with record, disabling augmentation");
5282 goto skip_augmentation;
5283 }
5284
5285 trace.skel = augmented_raw_syscalls_bpf__open();
5286 if (!trace.skel) {
5287 pr_debug("Failed to open augmented syscalls BPF skeleton");
5288 } else {
5289 /*
5290 * Disable attaching the BPF programs except for sys_enter and
5291 * sys_exit that tail call into this as necessary.
5292 */
5293 struct bpf_program *prog;
5294
5295 bpf_object__for_each_program(prog, trace.skel->obj) {
5296 if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit)
5297 bpf_program__set_autoattach(prog, /*autoattach=*/false);
5298 }
5299
5300 err = augmented_raw_syscalls_bpf__load(trace.skel);
5301
5302 if (err < 0) {
5303 libbpf_strerror(err, bf, sizeof(bf));
5304 pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf);
5305 } else {
5306 augmented_raw_syscalls_bpf__attach(trace.skel);
5307 trace__add_syscall_newtp(&trace);
5308 }
5309 }
5310
5311 err = bpf__setup_bpf_output(trace.evlist);
5312 if (err) {
5313 libbpf_strerror(err, bf, sizeof(bf));
5314 pr_err("ERROR: Setup BPF output event failed: %s\n", bf);
5315 goto out;
5316 }
5317 trace.syscalls.events.bpf_output = evlist__last(trace.evlist);
5318 assert(evsel__name_is(trace.syscalls.events.bpf_output, "__augmented_syscalls__"));
5319skip_augmentation:
5320#endif
5321 err = -1;
5322
5323 if (trace.trace_pgfaults) {
5324 trace.opts.sample_address = true;
5325 trace.opts.sample_time = true;
5326 }
5327
5328 if (trace.opts.mmap_pages == UINT_MAX)
5329 mmap_pages_user_set = false;
5330
5331 if (trace.max_stack == UINT_MAX) {
5332 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
5333 max_stack_user_set = false;
5334 }
5335
5336#ifdef HAVE_DWARF_UNWIND_SUPPORT
5337 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
5338 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
5339 }
5340#endif
5341
5342 if (callchain_param.enabled) {
5343 if (!mmap_pages_user_set && geteuid() == 0)
5344 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
5345
5346 symbol_conf.use_callchain = true;
5347 }
5348
5349 if (trace.evlist->core.nr_entries > 0) {
5350 bool use_btf = false;
5351
5352 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
5353 if (evlist__set_syscall_tp_fields(trace.evlist, &use_btf)) {
5354 perror("failed to set syscalls:* tracepoint fields");
5355 goto out;
5356 }
5357
5358 if (use_btf)
5359 trace__load_vmlinux_btf(&trace);
5360 }
5361
5362 if (trace.sort_events) {
5363 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
5364 ordered_events__set_copy_on_queue(&trace.oe.data, true);
5365 }
5366
5367 /*
5368 * If we are augmenting syscalls, then combine what we put in the
5369 * __augmented_syscalls__ BPF map with what is in the
5370 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
5371 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
5372 *
5373 * We'll switch to look at two BPF maps, one for sys_enter and the
5374 * other for sys_exit when we start augmenting the sys_exit paths with
5375 * buffers that are being copied from kernel to userspace, think 'read'
5376 * syscall.
5377 */
5378 if (trace.syscalls.events.bpf_output) {
5379 evlist__for_each_entry(trace.evlist, evsel) {
5380 bool raw_syscalls_sys_exit = evsel__name_is(evsel, "raw_syscalls:sys_exit");
5381
5382 if (raw_syscalls_sys_exit) {
5383 trace.raw_augmented_syscalls = true;
5384 goto init_augmented_syscall_tp;
5385 }
5386
5387 if (trace.syscalls.events.bpf_output->priv == NULL &&
5388 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5389 struct evsel *augmented = trace.syscalls.events.bpf_output;
5390 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5391 evsel__init_augmented_syscall_tp_args(augmented))
5392 goto out;
5393 /*
5394 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5395 * Above we made sure we can get from the payload the tp fields
5396 * that we get from syscalls:sys_enter tracefs format file.
5397 */
5398 augmented->handler = trace__sys_enter;
5399 /*
5400 * Now we do the same for the *syscalls:sys_enter event so that
5401 * if we handle it directly, i.e. if the BPF prog returns 0 so
5402 * as not to filter it, then we'll handle it just like we would
5403 * for the BPF_OUTPUT one:
5404 */
5405 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5406 evsel__init_augmented_syscall_tp_args(evsel))
5407 goto out;
5408 evsel->handler = trace__sys_enter;
5409 }
5410
5411 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5412 struct syscall_tp *sc;
5413init_augmented_syscall_tp:
5414 if (evsel__init_augmented_syscall_tp(evsel, evsel))
5415 goto out;
5416 sc = __evsel__syscall_tp(evsel);
5417 /*
5418 * For now with BPF raw_augmented we hook into
5419 * raw_syscalls:sys_enter and there we get all
5420 * 6 syscall args plus the tracepoint common
5421 * fields and the syscall_nr (another long).
5422 * So we check if that is the case and if so
5423 * don't look after the sc->args_size but
5424 * always after the full raw_syscalls:sys_enter
5425 * payload, which is fixed.
5426 *
5427 * We'll revisit this later to pass
5428 * s->args_size to the BPF augmenter (now
5429 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5430 * so that it copies only what we need for each
5431 * syscall, like what happens when we use
5432 * syscalls:sys_enter_NAME, so that we reduce
5433 * the kernel/userspace traffic to just what is
5434 * needed for each syscall.
5435 */
5436 if (trace.raw_augmented_syscalls)
5437 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5438 evsel__init_augmented_syscall_tp_ret(evsel);
5439 evsel->handler = trace__sys_exit;
5440 }
5441 }
5442 }
5443
5444 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5445 return trace__record(&trace, argc-1, &argv[1]);
5446
5447 /* Using just --errno-summary will trigger --summary */
5448 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5449 trace.summary_only = true;
5450
5451 /* summary_only implies summary option, but don't overwrite summary if set */
5452 if (trace.summary_only)
5453 trace.summary = trace.summary_only;
5454
5455 /* Keep exited threads, otherwise information might be lost for summary */
5456 if (trace.summary)
5457 symbol_conf.keep_exited_threads = true;
5458
5459 if (output_name != NULL) {
5460 err = trace__open_output(&trace, output_name);
5461 if (err < 0) {
5462 perror("failed to create output file");
5463 goto out;
5464 }
5465 }
5466
5467 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5468 if (err)
5469 goto out_close;
5470
5471 err = target__validate(&trace.opts.target);
5472 if (err) {
5473 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5474 fprintf(trace.output, "%s", bf);
5475 goto out_close;
5476 }
5477
5478 err = target__parse_uid(&trace.opts.target);
5479 if (err) {
5480 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5481 fprintf(trace.output, "%s", bf);
5482 goto out_close;
5483 }
5484
5485 if (!argc && target__none(&trace.opts.target))
5486 trace.opts.target.system_wide = true;
5487
5488 if (input_name)
5489 err = trace__replay(&trace);
5490 else
5491 err = trace__run(&trace, argc, argv);
5492
5493out_close:
5494 if (output_name != NULL)
5495 fclose(trace.output);
5496out:
5497 trace__exit(&trace);
5498#ifdef HAVE_BPF_SKEL
5499 augmented_raw_syscalls_bpf__destroy(trace.skel);
5500#endif
5501 return err;
5502}