Loading...
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#endif
22#include "util/bpf_map.h"
23#include "util/rlimit.h"
24#include "builtin.h"
25#include "util/cgroup.h"
26#include "util/color.h"
27#include "util/config.h"
28#include "util/debug.h"
29#include "util/dso.h"
30#include "util/env.h"
31#include "util/event.h"
32#include "util/evsel.h"
33#include "util/evsel_fprintf.h"
34#include "util/synthetic-events.h"
35#include "util/evlist.h"
36#include "util/evswitch.h"
37#include "util/mmap.h"
38#include <subcmd/pager.h>
39#include <subcmd/exec-cmd.h>
40#include "util/machine.h"
41#include "util/map.h"
42#include "util/symbol.h"
43#include "util/path.h"
44#include "util/session.h"
45#include "util/thread.h"
46#include <subcmd/parse-options.h>
47#include "util/strlist.h"
48#include "util/intlist.h"
49#include "util/thread_map.h"
50#include "util/stat.h"
51#include "util/tool.h"
52#include "util/util.h"
53#include "trace/beauty/beauty.h"
54#include "trace-event.h"
55#include "util/parse-events.h"
56#include "util/bpf-loader.h"
57#include "util/tracepoint.h"
58#include "callchain.h"
59#include "print_binary.h"
60#include "string2.h"
61#include "syscalltbl.h"
62#include "rb_resort.h"
63#include "../perf.h"
64
65#include <errno.h>
66#include <inttypes.h>
67#include <poll.h>
68#include <signal.h>
69#include <stdlib.h>
70#include <string.h>
71#include <linux/err.h>
72#include <linux/filter.h>
73#include <linux/kernel.h>
74#include <linux/random.h>
75#include <linux/stringify.h>
76#include <linux/time64.h>
77#include <linux/zalloc.h>
78#include <fcntl.h>
79#include <sys/sysmacros.h>
80
81#include <linux/ctype.h>
82#include <perf/mmap.h>
83
84#ifdef HAVE_LIBTRACEEVENT
85#include <traceevent/event-parse.h>
86#endif
87
88#ifndef O_CLOEXEC
89# define O_CLOEXEC 02000000
90#endif
91
92#ifndef F_LINUX_SPECIFIC_BASE
93# define F_LINUX_SPECIFIC_BASE 1024
94#endif
95
96#define RAW_SYSCALL_ARGS_NUM 6
97
98/*
99 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
100 */
101struct syscall_arg_fmt {
102 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
103 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
104 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
105 void *parm;
106 const char *name;
107 u16 nr_entries; // for arrays
108 bool show_zero;
109};
110
111struct syscall_fmt {
112 const char *name;
113 const char *alias;
114 struct {
115 const char *sys_enter,
116 *sys_exit;
117 } bpf_prog_name;
118 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM];
119 u8 nr_args;
120 bool errpid;
121 bool timeout;
122 bool hexret;
123};
124
125struct trace {
126 struct perf_tool tool;
127 struct syscalltbl *sctbl;
128 struct {
129 struct syscall *table;
130 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
131 struct bpf_map *sys_enter,
132 *sys_exit;
133 } prog_array;
134 struct {
135 struct evsel *sys_enter,
136 *sys_exit,
137 *augmented;
138 } events;
139 struct bpf_program *unaugmented_prog;
140 } syscalls;
141 struct {
142 struct bpf_map *map;
143 } dump;
144 struct record_opts opts;
145 struct evlist *evlist;
146 struct machine *host;
147 struct thread *current;
148 struct bpf_object *bpf_obj;
149 struct cgroup *cgroup;
150 u64 base_time;
151 FILE *output;
152 unsigned long nr_events;
153 unsigned long nr_events_printed;
154 unsigned long max_events;
155 struct evswitch evswitch;
156 struct strlist *ev_qualifier;
157 struct {
158 size_t nr;
159 int *entries;
160 } ev_qualifier_ids;
161 struct {
162 size_t nr;
163 pid_t *entries;
164 struct bpf_map *map;
165 } filter_pids;
166 double duration_filter;
167 double runtime_ms;
168 struct {
169 u64 vfs_getname,
170 proc_getname;
171 } stats;
172 unsigned int max_stack;
173 unsigned int min_stack;
174 int raw_augmented_syscalls_args_size;
175 bool raw_augmented_syscalls;
176 bool fd_path_disabled;
177 bool sort_events;
178 bool not_ev_qualifier;
179 bool live;
180 bool full_time;
181 bool sched;
182 bool multiple_threads;
183 bool summary;
184 bool summary_only;
185 bool errno_summary;
186 bool failure_only;
187 bool show_comm;
188 bool print_sample;
189 bool show_tool_stats;
190 bool trace_syscalls;
191 bool libtraceevent_print;
192 bool kernel_syscallchains;
193 s16 args_alignment;
194 bool show_tstamp;
195 bool show_duration;
196 bool show_zeros;
197 bool show_arg_names;
198 bool show_string_prefix;
199 bool force;
200 bool vfs_getname;
201 int trace_pgfaults;
202 char *perfconfig_events;
203 struct {
204 struct ordered_events data;
205 u64 last;
206 } oe;
207};
208
209struct tp_field {
210 int offset;
211 union {
212 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
213 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
214 };
215};
216
217#define TP_UINT_FIELD(bits) \
218static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
219{ \
220 u##bits value; \
221 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
222 return value; \
223}
224
225TP_UINT_FIELD(8);
226TP_UINT_FIELD(16);
227TP_UINT_FIELD(32);
228TP_UINT_FIELD(64);
229
230#define TP_UINT_FIELD__SWAPPED(bits) \
231static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
232{ \
233 u##bits value; \
234 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
235 return bswap_##bits(value);\
236}
237
238TP_UINT_FIELD__SWAPPED(16);
239TP_UINT_FIELD__SWAPPED(32);
240TP_UINT_FIELD__SWAPPED(64);
241
242static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
243{
244 field->offset = offset;
245
246 switch (size) {
247 case 1:
248 field->integer = tp_field__u8;
249 break;
250 case 2:
251 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
252 break;
253 case 4:
254 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
255 break;
256 case 8:
257 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
258 break;
259 default:
260 return -1;
261 }
262
263 return 0;
264}
265
266static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
267{
268 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
269}
270
271static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
272{
273 return sample->raw_data + field->offset;
274}
275
276static int __tp_field__init_ptr(struct tp_field *field, int offset)
277{
278 field->offset = offset;
279 field->pointer = tp_field__ptr;
280 return 0;
281}
282
283static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
284{
285 return __tp_field__init_ptr(field, format_field->offset);
286}
287
288struct syscall_tp {
289 struct tp_field id;
290 union {
291 struct tp_field args, ret;
292 };
293};
294
295/*
296 * The evsel->priv as used by 'perf trace'
297 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
298 * fmt: for all the other tracepoints
299 */
300struct evsel_trace {
301 struct syscall_tp sc;
302 struct syscall_arg_fmt *fmt;
303};
304
305static struct evsel_trace *evsel_trace__new(void)
306{
307 return zalloc(sizeof(struct evsel_trace));
308}
309
310static void evsel_trace__delete(struct evsel_trace *et)
311{
312 if (et == NULL)
313 return;
314
315 zfree(&et->fmt);
316 free(et);
317}
318
319/*
320 * Used with raw_syscalls:sys_{enter,exit} and with the
321 * syscalls:sys_{enter,exit}_SYSCALL tracepoints
322 */
323static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
324{
325 struct evsel_trace *et = evsel->priv;
326
327 return &et->sc;
328}
329
330static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
331{
332 if (evsel->priv == NULL) {
333 evsel->priv = evsel_trace__new();
334 if (evsel->priv == NULL)
335 return NULL;
336 }
337
338 return __evsel__syscall_tp(evsel);
339}
340
341/*
342 * Used with all the other tracepoints.
343 */
344static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
345{
346 struct evsel_trace *et = evsel->priv;
347
348 return et->fmt;
349}
350
351static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
352{
353 struct evsel_trace *et = evsel->priv;
354
355 if (evsel->priv == NULL) {
356 et = evsel->priv = evsel_trace__new();
357
358 if (et == NULL)
359 return NULL;
360 }
361
362 if (et->fmt == NULL) {
363 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
364 if (et->fmt == NULL)
365 goto out_delete;
366 }
367
368 return __evsel__syscall_arg_fmt(evsel);
369
370out_delete:
371 evsel_trace__delete(evsel->priv);
372 evsel->priv = NULL;
373 return NULL;
374}
375
376static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
377{
378 struct tep_format_field *format_field = evsel__field(evsel, name);
379
380 if (format_field == NULL)
381 return -1;
382
383 return tp_field__init_uint(field, format_field, evsel->needs_swap);
384}
385
386#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
387 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
388 evsel__init_tp_uint_field(evsel, &sc->name, #name); })
389
390static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
391{
392 struct tep_format_field *format_field = evsel__field(evsel, name);
393
394 if (format_field == NULL)
395 return -1;
396
397 return tp_field__init_ptr(field, format_field);
398}
399
400#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
401 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
402 evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
403
404static void evsel__delete_priv(struct evsel *evsel)
405{
406 zfree(&evsel->priv);
407 evsel__delete(evsel);
408}
409
410static int evsel__init_syscall_tp(struct evsel *evsel)
411{
412 struct syscall_tp *sc = evsel__syscall_tp(evsel);
413
414 if (sc != NULL) {
415 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
416 evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
417 return -ENOENT;
418 return 0;
419 }
420
421 return -ENOMEM;
422}
423
424static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
425{
426 struct syscall_tp *sc = evsel__syscall_tp(evsel);
427
428 if (sc != NULL) {
429 struct tep_format_field *syscall_id = evsel__field(tp, "id");
430 if (syscall_id == NULL)
431 syscall_id = evsel__field(tp, "__syscall_nr");
432 if (syscall_id == NULL ||
433 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
434 return -EINVAL;
435
436 return 0;
437 }
438
439 return -ENOMEM;
440}
441
442static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
443{
444 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
445
446 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
447}
448
449static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
450{
451 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
452
453 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
454}
455
456static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
457{
458 if (evsel__syscall_tp(evsel) != NULL) {
459 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
460 return -ENOENT;
461
462 evsel->handler = handler;
463 return 0;
464 }
465
466 return -ENOMEM;
467}
468
469static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
470{
471 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
472
473 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
474 if (IS_ERR(evsel))
475 evsel = evsel__newtp("syscalls", direction);
476
477 if (IS_ERR(evsel))
478 return NULL;
479
480 if (evsel__init_raw_syscall_tp(evsel, handler))
481 goto out_delete;
482
483 return evsel;
484
485out_delete:
486 evsel__delete_priv(evsel);
487 return NULL;
488}
489
490#define perf_evsel__sc_tp_uint(evsel, name, sample) \
491 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
492 fields->name.integer(&fields->name, sample); })
493
494#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
495 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
496 fields->name.pointer(&fields->name, sample); })
497
498size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
499{
500 int idx = val - sa->offset;
501
502 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
503 size_t printed = scnprintf(bf, size, intfmt, val);
504 if (show_suffix)
505 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
506 return printed;
507 }
508
509 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
510}
511
512size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
513{
514 int idx = val - sa->offset;
515
516 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
517 size_t printed = scnprintf(bf, size, intfmt, val);
518 if (show_prefix)
519 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
520 return printed;
521 }
522
523 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
524}
525
526static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
527 const char *intfmt,
528 struct syscall_arg *arg)
529{
530 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
531}
532
533static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
534 struct syscall_arg *arg)
535{
536 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
537}
538
539#define SCA_STRARRAY syscall_arg__scnprintf_strarray
540
541bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
542{
543 return strarray__strtoul(arg->parm, bf, size, ret);
544}
545
546bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
547{
548 return strarray__strtoul_flags(arg->parm, bf, size, ret);
549}
550
551bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
552{
553 return strarrays__strtoul(arg->parm, bf, size, ret);
554}
555
556size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
557{
558 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
559}
560
561size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
562{
563 size_t printed;
564 int i;
565
566 for (i = 0; i < sas->nr_entries; ++i) {
567 struct strarray *sa = sas->entries[i];
568 int idx = val - sa->offset;
569
570 if (idx >= 0 && idx < sa->nr_entries) {
571 if (sa->entries[idx] == NULL)
572 break;
573 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
574 }
575 }
576
577 printed = scnprintf(bf, size, intfmt, val);
578 if (show_prefix)
579 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
580 return printed;
581}
582
583bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
584{
585 int i;
586
587 for (i = 0; i < sa->nr_entries; ++i) {
588 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
589 *ret = sa->offset + i;
590 return true;
591 }
592 }
593
594 return false;
595}
596
597bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
598{
599 u64 val = 0;
600 char *tok = bf, *sep, *end;
601
602 *ret = 0;
603
604 while (size != 0) {
605 int toklen = size;
606
607 sep = memchr(tok, '|', size);
608 if (sep != NULL) {
609 size -= sep - tok + 1;
610
611 end = sep - 1;
612 while (end > tok && isspace(*end))
613 --end;
614
615 toklen = end - tok + 1;
616 }
617
618 while (isspace(*tok))
619 ++tok;
620
621 if (isalpha(*tok) || *tok == '_') {
622 if (!strarray__strtoul(sa, tok, toklen, &val))
623 return false;
624 } else
625 val = strtoul(tok, NULL, 0);
626
627 *ret |= (1 << (val - 1));
628
629 if (sep == NULL)
630 break;
631 tok = sep + 1;
632 }
633
634 return true;
635}
636
637bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
638{
639 int i;
640
641 for (i = 0; i < sas->nr_entries; ++i) {
642 struct strarray *sa = sas->entries[i];
643
644 if (strarray__strtoul(sa, bf, size, ret))
645 return true;
646 }
647
648 return false;
649}
650
651size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
652 struct syscall_arg *arg)
653{
654 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
655}
656
657#ifndef AT_FDCWD
658#define AT_FDCWD -100
659#endif
660
661static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
662 struct syscall_arg *arg)
663{
664 int fd = arg->val;
665 const char *prefix = "AT_FD";
666
667 if (fd == AT_FDCWD)
668 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
669
670 return syscall_arg__scnprintf_fd(bf, size, arg);
671}
672
673#define SCA_FDAT syscall_arg__scnprintf_fd_at
674
675static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
676 struct syscall_arg *arg);
677
678#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
679
680size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
681{
682 return scnprintf(bf, size, "%#lx", arg->val);
683}
684
685size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
686{
687 if (arg->val == 0)
688 return scnprintf(bf, size, "NULL");
689 return syscall_arg__scnprintf_hex(bf, size, arg);
690}
691
692size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
693{
694 return scnprintf(bf, size, "%d", arg->val);
695}
696
697size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
698{
699 return scnprintf(bf, size, "%ld", arg->val);
700}
701
702static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
703{
704 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
705 // fill missing comms using thread__set_comm()...
706 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
707 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
708}
709
710#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
711
712static const char *bpf_cmd[] = {
713 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
714 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH",
715 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID",
716 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD",
717 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID",
718 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE",
719 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH",
720 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE",
721 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE",
722 "LINK_DETACH", "PROG_BIND_MAP",
723};
724static DEFINE_STRARRAY(bpf_cmd, "BPF_");
725
726static const char *fsmount_flags[] = {
727 [1] = "CLOEXEC",
728};
729static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
730
731#include "trace/beauty/generated/fsconfig_arrays.c"
732
733static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
734
735static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
736static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
737
738static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
739static DEFINE_STRARRAY(itimers, "ITIMER_");
740
741static const char *keyctl_options[] = {
742 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
743 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
744 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
745 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
746 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
747};
748static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
749
750static const char *whences[] = { "SET", "CUR", "END",
751#ifdef SEEK_DATA
752"DATA",
753#endif
754#ifdef SEEK_HOLE
755"HOLE",
756#endif
757};
758static DEFINE_STRARRAY(whences, "SEEK_");
759
760static const char *fcntl_cmds[] = {
761 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
762 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
763 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
764 "GETOWNER_UIDS",
765};
766static DEFINE_STRARRAY(fcntl_cmds, "F_");
767
768static const char *fcntl_linux_specific_cmds[] = {
769 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
770 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
771 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
772};
773
774static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
775
776static struct strarray *fcntl_cmds_arrays[] = {
777 &strarray__fcntl_cmds,
778 &strarray__fcntl_linux_specific_cmds,
779};
780
781static DEFINE_STRARRAYS(fcntl_cmds_arrays);
782
783static const char *rlimit_resources[] = {
784 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
785 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
786 "RTTIME",
787};
788static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
789
790static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
791static DEFINE_STRARRAY(sighow, "SIG_");
792
793static const char *clockid[] = {
794 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
795 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
796 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
797};
798static DEFINE_STRARRAY(clockid, "CLOCK_");
799
800static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
801 struct syscall_arg *arg)
802{
803 bool show_prefix = arg->show_string_prefix;
804 const char *suffix = "_OK";
805 size_t printed = 0;
806 int mode = arg->val;
807
808 if (mode == F_OK) /* 0 */
809 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
810#define P_MODE(n) \
811 if (mode & n##_OK) { \
812 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
813 mode &= ~n##_OK; \
814 }
815
816 P_MODE(R);
817 P_MODE(W);
818 P_MODE(X);
819#undef P_MODE
820
821 if (mode)
822 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
823
824 return printed;
825}
826
827#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
828
829static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
830 struct syscall_arg *arg);
831
832#define SCA_FILENAME syscall_arg__scnprintf_filename
833
834static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
835 struct syscall_arg *arg)
836{
837 bool show_prefix = arg->show_string_prefix;
838 const char *prefix = "O_";
839 int printed = 0, flags = arg->val;
840
841#define P_FLAG(n) \
842 if (flags & O_##n) { \
843 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
844 flags &= ~O_##n; \
845 }
846
847 P_FLAG(CLOEXEC);
848 P_FLAG(NONBLOCK);
849#undef P_FLAG
850
851 if (flags)
852 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
853
854 return printed;
855}
856
857#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
858
859#ifndef GRND_NONBLOCK
860#define GRND_NONBLOCK 0x0001
861#endif
862#ifndef GRND_RANDOM
863#define GRND_RANDOM 0x0002
864#endif
865
866static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
867 struct syscall_arg *arg)
868{
869 bool show_prefix = arg->show_string_prefix;
870 const char *prefix = "GRND_";
871 int printed = 0, flags = arg->val;
872
873#define P_FLAG(n) \
874 if (flags & GRND_##n) { \
875 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
876 flags &= ~GRND_##n; \
877 }
878
879 P_FLAG(RANDOM);
880 P_FLAG(NONBLOCK);
881#undef P_FLAG
882
883 if (flags)
884 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
885
886 return printed;
887}
888
889#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
890
891#define STRARRAY(name, array) \
892 { .scnprintf = SCA_STRARRAY, \
893 .strtoul = STUL_STRARRAY, \
894 .parm = &strarray__##array, }
895
896#define STRARRAY_FLAGS(name, array) \
897 { .scnprintf = SCA_STRARRAY_FLAGS, \
898 .strtoul = STUL_STRARRAY_FLAGS, \
899 .parm = &strarray__##array, }
900
901#include "trace/beauty/arch_errno_names.c"
902#include "trace/beauty/eventfd.c"
903#include "trace/beauty/futex_op.c"
904#include "trace/beauty/futex_val3.c"
905#include "trace/beauty/mmap.c"
906#include "trace/beauty/mode_t.c"
907#include "trace/beauty/msg_flags.c"
908#include "trace/beauty/open_flags.c"
909#include "trace/beauty/perf_event_open.c"
910#include "trace/beauty/pid.c"
911#include "trace/beauty/sched_policy.c"
912#include "trace/beauty/seccomp.c"
913#include "trace/beauty/signum.c"
914#include "trace/beauty/socket_type.c"
915#include "trace/beauty/waitid_options.c"
916
917static struct syscall_fmt syscall_fmts[] = {
918 { .name = "access",
919 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
920 { .name = "arch_prctl",
921 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
922 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
923 { .name = "bind",
924 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
925 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
926 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
927 { .name = "bpf",
928 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
929 { .name = "brk", .hexret = true,
930 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
931 { .name = "clock_gettime",
932 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
933 { .name = "clock_nanosleep",
934 .arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, },
935 { .name = "clone", .errpid = true, .nr_args = 5,
936 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
937 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
938 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
939 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
940 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
941 { .name = "close",
942 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
943 { .name = "connect",
944 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
945 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
946 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
947 { .name = "epoll_ctl",
948 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
949 { .name = "eventfd2",
950 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
951 { .name = "fchmodat",
952 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
953 { .name = "fchownat",
954 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
955 { .name = "fcntl",
956 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
957 .strtoul = STUL_STRARRAYS,
958 .parm = &strarrays__fcntl_cmds_arrays,
959 .show_zero = true, },
960 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
961 { .name = "flock",
962 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
963 { .name = "fsconfig",
964 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
965 { .name = "fsmount",
966 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
967 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
968 { .name = "fspick",
969 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
970 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
971 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
972 { .name = "fstat", .alias = "newfstat", },
973 { .name = "fstatat", .alias = "newfstatat", },
974 { .name = "futex",
975 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
976 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
977 { .name = "futimesat",
978 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
979 { .name = "getitimer",
980 .arg = { [0] = STRARRAY(which, itimers), }, },
981 { .name = "getpid", .errpid = true, },
982 { .name = "getpgid", .errpid = true, },
983 { .name = "getppid", .errpid = true, },
984 { .name = "getrandom",
985 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
986 { .name = "getrlimit",
987 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
988 { .name = "getsockopt",
989 .arg = { [1] = STRARRAY(level, socket_level), }, },
990 { .name = "gettid", .errpid = true, },
991 { .name = "ioctl",
992 .arg = {
993#if defined(__i386__) || defined(__x86_64__)
994/*
995 * FIXME: Make this available to all arches.
996 */
997 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
998 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
999#else
1000 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
1001#endif
1002 { .name = "kcmp", .nr_args = 5,
1003 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
1004 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
1005 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
1006 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
1007 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
1008 { .name = "keyctl",
1009 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
1010 { .name = "kill",
1011 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1012 { .name = "linkat",
1013 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1014 { .name = "lseek",
1015 .arg = { [2] = STRARRAY(whence, whences), }, },
1016 { .name = "lstat", .alias = "newlstat", },
1017 { .name = "madvise",
1018 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1019 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1020 { .name = "mkdirat",
1021 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1022 { .name = "mknodat",
1023 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1024 { .name = "mmap", .hexret = true,
1025/* The standard mmap maps to old_mmap on s390x */
1026#if defined(__s390x__)
1027 .alias = "old_mmap",
1028#endif
1029 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1030 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1031 .strtoul = STUL_STRARRAY_FLAGS,
1032 .parm = &strarray__mmap_flags, },
1033 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1034 { .name = "mount",
1035 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1036 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1037 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1038 { .name = "move_mount",
1039 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1040 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1041 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1042 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1043 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1044 { .name = "mprotect",
1045 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1046 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1047 { .name = "mq_unlink",
1048 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1049 { .name = "mremap", .hexret = true,
1050 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1051 { .name = "name_to_handle_at",
1052 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1053 { .name = "newfstatat",
1054 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1055 { .name = "open",
1056 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1057 { .name = "open_by_handle_at",
1058 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1059 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1060 { .name = "openat",
1061 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1062 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1063 { .name = "perf_event_open",
1064 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ },
1065 [2] = { .scnprintf = SCA_INT, /* cpu */ },
1066 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1067 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1068 { .name = "pipe2",
1069 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1070 { .name = "pkey_alloc",
1071 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1072 { .name = "pkey_free",
1073 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1074 { .name = "pkey_mprotect",
1075 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1076 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1077 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1078 { .name = "poll", .timeout = true, },
1079 { .name = "ppoll", .timeout = true, },
1080 { .name = "prctl",
1081 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1082 .strtoul = STUL_STRARRAY,
1083 .parm = &strarray__prctl_options, },
1084 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1085 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1086 { .name = "pread", .alias = "pread64", },
1087 { .name = "preadv", .alias = "pread", },
1088 { .name = "prlimit64",
1089 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1090 { .name = "pwrite", .alias = "pwrite64", },
1091 { .name = "readlinkat",
1092 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1093 { .name = "recvfrom",
1094 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1095 { .name = "recvmmsg",
1096 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1097 { .name = "recvmsg",
1098 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1099 { .name = "renameat",
1100 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1101 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1102 { .name = "renameat2",
1103 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1104 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1105 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1106 { .name = "rt_sigaction",
1107 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1108 { .name = "rt_sigprocmask",
1109 .arg = { [0] = STRARRAY(how, sighow), }, },
1110 { .name = "rt_sigqueueinfo",
1111 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1112 { .name = "rt_tgsigqueueinfo",
1113 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1114 { .name = "sched_setscheduler",
1115 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1116 { .name = "seccomp",
1117 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1118 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1119 { .name = "select", .timeout = true, },
1120 { .name = "sendfile", .alias = "sendfile64", },
1121 { .name = "sendmmsg",
1122 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1123 { .name = "sendmsg",
1124 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1125 { .name = "sendto",
1126 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1127 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1128 { .name = "set_tid_address", .errpid = true, },
1129 { .name = "setitimer",
1130 .arg = { [0] = STRARRAY(which, itimers), }, },
1131 { .name = "setrlimit",
1132 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1133 { .name = "setsockopt",
1134 .arg = { [1] = STRARRAY(level, socket_level), }, },
1135 { .name = "socket",
1136 .arg = { [0] = STRARRAY(family, socket_families),
1137 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1138 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1139 { .name = "socketpair",
1140 .arg = { [0] = STRARRAY(family, socket_families),
1141 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1142 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1143 { .name = "stat", .alias = "newstat", },
1144 { .name = "statx",
1145 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1146 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1147 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1148 { .name = "swapoff",
1149 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1150 { .name = "swapon",
1151 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1152 { .name = "symlinkat",
1153 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1154 { .name = "sync_file_range",
1155 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1156 { .name = "tgkill",
1157 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1158 { .name = "tkill",
1159 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1160 { .name = "umount2", .alias = "umount",
1161 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1162 { .name = "uname", .alias = "newuname", },
1163 { .name = "unlinkat",
1164 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1165 { .name = "utimensat",
1166 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1167 { .name = "wait4", .errpid = true,
1168 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1169 { .name = "waitid", .errpid = true,
1170 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1171};
1172
1173static int syscall_fmt__cmp(const void *name, const void *fmtp)
1174{
1175 const struct syscall_fmt *fmt = fmtp;
1176 return strcmp(name, fmt->name);
1177}
1178
1179static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name)
1180{
1181 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1182}
1183
1184static struct syscall_fmt *syscall_fmt__find(const char *name)
1185{
1186 const int nmemb = ARRAY_SIZE(syscall_fmts);
1187 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1188}
1189
1190static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
1191{
1192 int i;
1193
1194 for (i = 0; i < nmemb; ++i) {
1195 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1196 return &fmts[i];
1197 }
1198
1199 return NULL;
1200}
1201
1202static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1203{
1204 const int nmemb = ARRAY_SIZE(syscall_fmts);
1205 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1206}
1207
1208/*
1209 * is_exit: is this "exit" or "exit_group"?
1210 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1211 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1212 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1213 */
1214struct syscall {
1215 struct tep_event *tp_format;
1216 int nr_args;
1217 int args_size;
1218 struct {
1219 struct bpf_program *sys_enter,
1220 *sys_exit;
1221 } bpf_prog;
1222 bool is_exit;
1223 bool is_open;
1224 bool nonexistent;
1225 struct tep_format_field *args;
1226 const char *name;
1227 struct syscall_fmt *fmt;
1228 struct syscall_arg_fmt *arg_fmt;
1229};
1230
1231/*
1232 * We need to have this 'calculated' boolean because in some cases we really
1233 * don't know what is the duration of a syscall, for instance, when we start
1234 * a session and some threads are waiting for a syscall to finish, say 'poll',
1235 * in which case all we can do is to print "( ? ) for duration and for the
1236 * start timestamp.
1237 */
1238static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1239{
1240 double duration = (double)t / NSEC_PER_MSEC;
1241 size_t printed = fprintf(fp, "(");
1242
1243 if (!calculated)
1244 printed += fprintf(fp, " ");
1245 else if (duration >= 1.0)
1246 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1247 else if (duration >= 0.01)
1248 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1249 else
1250 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1251 return printed + fprintf(fp, "): ");
1252}
1253
1254/**
1255 * filename.ptr: The filename char pointer that will be vfs_getname'd
1256 * filename.entry_str_pos: Where to insert the string translated from
1257 * filename.ptr by the vfs_getname tracepoint/kprobe.
1258 * ret_scnprintf: syscall args may set this to a different syscall return
1259 * formatter, for instance, fcntl may return fds, file flags, etc.
1260 */
1261struct thread_trace {
1262 u64 entry_time;
1263 bool entry_pending;
1264 unsigned long nr_events;
1265 unsigned long pfmaj, pfmin;
1266 char *entry_str;
1267 double runtime_ms;
1268 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1269 struct {
1270 unsigned long ptr;
1271 short int entry_str_pos;
1272 bool pending_open;
1273 unsigned int namelen;
1274 char *name;
1275 } filename;
1276 struct {
1277 int max;
1278 struct file *table;
1279 } files;
1280
1281 struct intlist *syscall_stats;
1282};
1283
1284static struct thread_trace *thread_trace__new(void)
1285{
1286 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1287
1288 if (ttrace) {
1289 ttrace->files.max = -1;
1290 ttrace->syscall_stats = intlist__new(NULL);
1291 }
1292
1293 return ttrace;
1294}
1295
1296static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1297{
1298 struct thread_trace *ttrace;
1299
1300 if (thread == NULL)
1301 goto fail;
1302
1303 if (thread__priv(thread) == NULL)
1304 thread__set_priv(thread, thread_trace__new());
1305
1306 if (thread__priv(thread) == NULL)
1307 goto fail;
1308
1309 ttrace = thread__priv(thread);
1310 ++ttrace->nr_events;
1311
1312 return ttrace;
1313fail:
1314 color_fprintf(fp, PERF_COLOR_RED,
1315 "WARNING: not enough memory, dropping samples!\n");
1316 return NULL;
1317}
1318
1319
1320void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1321 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1322{
1323 struct thread_trace *ttrace = thread__priv(arg->thread);
1324
1325 ttrace->ret_scnprintf = ret_scnprintf;
1326}
1327
1328#define TRACE_PFMAJ (1 << 0)
1329#define TRACE_PFMIN (1 << 1)
1330
1331static const size_t trace__entry_str_size = 2048;
1332
1333static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1334{
1335 if (fd < 0)
1336 return NULL;
1337
1338 if (fd > ttrace->files.max) {
1339 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1340
1341 if (nfiles == NULL)
1342 return NULL;
1343
1344 if (ttrace->files.max != -1) {
1345 memset(nfiles + ttrace->files.max + 1, 0,
1346 (fd - ttrace->files.max) * sizeof(struct file));
1347 } else {
1348 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1349 }
1350
1351 ttrace->files.table = nfiles;
1352 ttrace->files.max = fd;
1353 }
1354
1355 return ttrace->files.table + fd;
1356}
1357
1358struct file *thread__files_entry(struct thread *thread, int fd)
1359{
1360 return thread_trace__files_entry(thread__priv(thread), fd);
1361}
1362
1363static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1364{
1365 struct thread_trace *ttrace = thread__priv(thread);
1366 struct file *file = thread_trace__files_entry(ttrace, fd);
1367
1368 if (file != NULL) {
1369 struct stat st;
1370 if (stat(pathname, &st) == 0)
1371 file->dev_maj = major(st.st_rdev);
1372 file->pathname = strdup(pathname);
1373 if (file->pathname)
1374 return 0;
1375 }
1376
1377 return -1;
1378}
1379
1380static int thread__read_fd_path(struct thread *thread, int fd)
1381{
1382 char linkname[PATH_MAX], pathname[PATH_MAX];
1383 struct stat st;
1384 int ret;
1385
1386 if (thread->pid_ == thread->tid) {
1387 scnprintf(linkname, sizeof(linkname),
1388 "/proc/%d/fd/%d", thread->pid_, fd);
1389 } else {
1390 scnprintf(linkname, sizeof(linkname),
1391 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1392 }
1393
1394 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1395 return -1;
1396
1397 ret = readlink(linkname, pathname, sizeof(pathname));
1398
1399 if (ret < 0 || ret > st.st_size)
1400 return -1;
1401
1402 pathname[ret] = '\0';
1403 return trace__set_fd_pathname(thread, fd, pathname);
1404}
1405
1406static const char *thread__fd_path(struct thread *thread, int fd,
1407 struct trace *trace)
1408{
1409 struct thread_trace *ttrace = thread__priv(thread);
1410
1411 if (ttrace == NULL || trace->fd_path_disabled)
1412 return NULL;
1413
1414 if (fd < 0)
1415 return NULL;
1416
1417 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1418 if (!trace->live)
1419 return NULL;
1420 ++trace->stats.proc_getname;
1421 if (thread__read_fd_path(thread, fd))
1422 return NULL;
1423 }
1424
1425 return ttrace->files.table[fd].pathname;
1426}
1427
1428size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1429{
1430 int fd = arg->val;
1431 size_t printed = scnprintf(bf, size, "%d", fd);
1432 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1433
1434 if (path)
1435 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1436
1437 return printed;
1438}
1439
1440size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1441{
1442 size_t printed = scnprintf(bf, size, "%d", fd);
1443 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1444
1445 if (thread) {
1446 const char *path = thread__fd_path(thread, fd, trace);
1447
1448 if (path)
1449 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1450
1451 thread__put(thread);
1452 }
1453
1454 return printed;
1455}
1456
1457static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1458 struct syscall_arg *arg)
1459{
1460 int fd = arg->val;
1461 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1462 struct thread_trace *ttrace = thread__priv(arg->thread);
1463
1464 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1465 zfree(&ttrace->files.table[fd].pathname);
1466
1467 return printed;
1468}
1469
1470static void thread__set_filename_pos(struct thread *thread, const char *bf,
1471 unsigned long ptr)
1472{
1473 struct thread_trace *ttrace = thread__priv(thread);
1474
1475 ttrace->filename.ptr = ptr;
1476 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1477}
1478
1479static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1480{
1481 struct augmented_arg *augmented_arg = arg->augmented.args;
1482 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1483 /*
1484 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1485 * we would have two strings, each prefixed by its size.
1486 */
1487 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1488
1489 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1490 arg->augmented.size -= consumed;
1491
1492 return printed;
1493}
1494
1495static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1496 struct syscall_arg *arg)
1497{
1498 unsigned long ptr = arg->val;
1499
1500 if (arg->augmented.args)
1501 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1502
1503 if (!arg->trace->vfs_getname)
1504 return scnprintf(bf, size, "%#x", ptr);
1505
1506 thread__set_filename_pos(arg->thread, bf, ptr);
1507 return 0;
1508}
1509
1510static bool trace__filter_duration(struct trace *trace, double t)
1511{
1512 return t < (trace->duration_filter * NSEC_PER_MSEC);
1513}
1514
1515static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1516{
1517 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1518
1519 return fprintf(fp, "%10.3f ", ts);
1520}
1521
1522/*
1523 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1524 * using ttrace->entry_time for a thread that receives a sys_exit without
1525 * first having received a sys_enter ("poll" issued before tracing session
1526 * starts, lost sys_enter exit due to ring buffer overflow).
1527 */
1528static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1529{
1530 if (tstamp > 0)
1531 return __trace__fprintf_tstamp(trace, tstamp, fp);
1532
1533 return fprintf(fp, " ? ");
1534}
1535
1536static pid_t workload_pid = -1;
1537static volatile sig_atomic_t done = false;
1538static volatile sig_atomic_t interrupted = false;
1539
1540static void sighandler_interrupt(int sig __maybe_unused)
1541{
1542 done = interrupted = true;
1543}
1544
1545static void sighandler_chld(int sig __maybe_unused, siginfo_t *info,
1546 void *context __maybe_unused)
1547{
1548 if (info->si_pid == workload_pid)
1549 done = true;
1550}
1551
1552static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1553{
1554 size_t printed = 0;
1555
1556 if (trace->multiple_threads) {
1557 if (trace->show_comm)
1558 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1559 printed += fprintf(fp, "%d ", thread->tid);
1560 }
1561
1562 return printed;
1563}
1564
1565static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1566 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1567{
1568 size_t printed = 0;
1569
1570 if (trace->show_tstamp)
1571 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1572 if (trace->show_duration)
1573 printed += fprintf_duration(duration, duration_calculated, fp);
1574 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1575}
1576
1577static int trace__process_event(struct trace *trace, struct machine *machine,
1578 union perf_event *event, struct perf_sample *sample)
1579{
1580 int ret = 0;
1581
1582 switch (event->header.type) {
1583 case PERF_RECORD_LOST:
1584 color_fprintf(trace->output, PERF_COLOR_RED,
1585 "LOST %" PRIu64 " events!\n", event->lost.lost);
1586 ret = machine__process_lost_event(machine, event, sample);
1587 break;
1588 default:
1589 ret = machine__process_event(machine, event, sample);
1590 break;
1591 }
1592
1593 return ret;
1594}
1595
1596static int trace__tool_process(struct perf_tool *tool,
1597 union perf_event *event,
1598 struct perf_sample *sample,
1599 struct machine *machine)
1600{
1601 struct trace *trace = container_of(tool, struct trace, tool);
1602 return trace__process_event(trace, machine, event, sample);
1603}
1604
1605static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1606{
1607 struct machine *machine = vmachine;
1608
1609 if (machine->kptr_restrict_warned)
1610 return NULL;
1611
1612 if (symbol_conf.kptr_restrict) {
1613 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1614 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1615 "Kernel samples will not be resolved.\n");
1616 machine->kptr_restrict_warned = true;
1617 return NULL;
1618 }
1619
1620 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1621}
1622
1623static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1624{
1625 int err = symbol__init(NULL);
1626
1627 if (err)
1628 return err;
1629
1630 trace->host = machine__new_host();
1631 if (trace->host == NULL)
1632 return -ENOMEM;
1633
1634 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1635 if (err < 0)
1636 goto out;
1637
1638 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1639 evlist->core.threads, trace__tool_process,
1640 true, false, 1);
1641out:
1642 if (err)
1643 symbol__exit();
1644
1645 return err;
1646}
1647
1648static void trace__symbols__exit(struct trace *trace)
1649{
1650 machine__exit(trace->host);
1651 trace->host = NULL;
1652
1653 symbol__exit();
1654}
1655
1656static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1657{
1658 int idx;
1659
1660 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0)
1661 nr_args = sc->fmt->nr_args;
1662
1663 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1664 if (sc->arg_fmt == NULL)
1665 return -1;
1666
1667 for (idx = 0; idx < nr_args; ++idx) {
1668 if (sc->fmt)
1669 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1670 }
1671
1672 sc->nr_args = nr_args;
1673 return 0;
1674}
1675
1676static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1677 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1678 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1679};
1680
1681static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1682{
1683 const struct syscall_arg_fmt *fmt = fmtp;
1684 return strcmp(name, fmt->name);
1685}
1686
1687static struct syscall_arg_fmt *
1688__syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
1689{
1690 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1691}
1692
1693static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1694{
1695 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1696 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1697}
1698
1699static struct tep_format_field *
1700syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1701{
1702 struct tep_format_field *last_field = NULL;
1703 int len;
1704
1705 for (; field; field = field->next, ++arg) {
1706 last_field = field;
1707
1708 if (arg->scnprintf)
1709 continue;
1710
1711 len = strlen(field->name);
1712
1713 if (strcmp(field->type, "const char *") == 0 &&
1714 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1715 strstr(field->name, "path") != NULL))
1716 arg->scnprintf = SCA_FILENAME;
1717 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1718 arg->scnprintf = SCA_PTR;
1719 else if (strcmp(field->type, "pid_t") == 0)
1720 arg->scnprintf = SCA_PID;
1721 else if (strcmp(field->type, "umode_t") == 0)
1722 arg->scnprintf = SCA_MODE_T;
1723 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1724 arg->scnprintf = SCA_CHAR_ARRAY;
1725 arg->nr_entries = field->arraylen;
1726 } else if ((strcmp(field->type, "int") == 0 ||
1727 strcmp(field->type, "unsigned int") == 0 ||
1728 strcmp(field->type, "long") == 0) &&
1729 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1730 /*
1731 * /sys/kernel/tracing/events/syscalls/sys_enter*
1732 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1733 * 65 int
1734 * 23 unsigned int
1735 * 7 unsigned long
1736 */
1737 arg->scnprintf = SCA_FD;
1738 } else {
1739 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
1740
1741 if (fmt) {
1742 arg->scnprintf = fmt->scnprintf;
1743 arg->strtoul = fmt->strtoul;
1744 }
1745 }
1746 }
1747
1748 return last_field;
1749}
1750
1751static int syscall__set_arg_fmts(struct syscall *sc)
1752{
1753 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1754
1755 if (last_field)
1756 sc->args_size = last_field->offset + last_field->size;
1757
1758 return 0;
1759}
1760
1761static int trace__read_syscall_info(struct trace *trace, int id)
1762{
1763 char tp_name[128];
1764 struct syscall *sc;
1765 const char *name = syscalltbl__name(trace->sctbl, id);
1766
1767#ifdef HAVE_SYSCALL_TABLE_SUPPORT
1768 if (trace->syscalls.table == NULL) {
1769 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1770 if (trace->syscalls.table == NULL)
1771 return -ENOMEM;
1772 }
1773#else
1774 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
1775 // When using libaudit we don't know beforehand what is the max syscall id
1776 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1777
1778 if (table == NULL)
1779 return -ENOMEM;
1780
1781 // Need to memset from offset 0 and +1 members if brand new
1782 if (trace->syscalls.table == NULL)
1783 memset(table, 0, (id + 1) * sizeof(*sc));
1784 else
1785 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1786
1787 trace->syscalls.table = table;
1788 trace->sctbl->syscalls.max_id = id;
1789 }
1790#endif
1791 sc = trace->syscalls.table + id;
1792 if (sc->nonexistent)
1793 return -EEXIST;
1794
1795 if (name == NULL) {
1796 sc->nonexistent = true;
1797 return -EEXIST;
1798 }
1799
1800 sc->name = name;
1801 sc->fmt = syscall_fmt__find(sc->name);
1802
1803 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1804 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1805
1806 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1807 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1808 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1809 }
1810
1811 /*
1812 * Fails to read trace point format via sysfs node, so the trace point
1813 * doesn't exist. Set the 'nonexistent' flag as true.
1814 */
1815 if (IS_ERR(sc->tp_format)) {
1816 sc->nonexistent = true;
1817 return PTR_ERR(sc->tp_format);
1818 }
1819
1820 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ?
1821 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields))
1822 return -ENOMEM;
1823
1824 sc->args = sc->tp_format->format.fields;
1825 /*
1826 * We need to check and discard the first variable '__syscall_nr'
1827 * or 'nr' that mean the syscall number. It is needless here.
1828 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1829 */
1830 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1831 sc->args = sc->args->next;
1832 --sc->nr_args;
1833 }
1834
1835 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1836 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1837
1838 return syscall__set_arg_fmts(sc);
1839}
1840
1841static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1842{
1843 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1844
1845 if (fmt != NULL) {
1846 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1847 return 0;
1848 }
1849
1850 return -ENOMEM;
1851}
1852
1853static int intcmp(const void *a, const void *b)
1854{
1855 const int *one = a, *another = b;
1856
1857 return *one - *another;
1858}
1859
1860static int trace__validate_ev_qualifier(struct trace *trace)
1861{
1862 int err = 0;
1863 bool printed_invalid_prefix = false;
1864 struct str_node *pos;
1865 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1866
1867 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1868 sizeof(trace->ev_qualifier_ids.entries[0]));
1869
1870 if (trace->ev_qualifier_ids.entries == NULL) {
1871 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1872 trace->output);
1873 err = -EINVAL;
1874 goto out;
1875 }
1876
1877 strlist__for_each_entry(pos, trace->ev_qualifier) {
1878 const char *sc = pos->s;
1879 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1880
1881 if (id < 0) {
1882 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1883 if (id >= 0)
1884 goto matches;
1885
1886 if (!printed_invalid_prefix) {
1887 pr_debug("Skipping unknown syscalls: ");
1888 printed_invalid_prefix = true;
1889 } else {
1890 pr_debug(", ");
1891 }
1892
1893 pr_debug("%s", sc);
1894 continue;
1895 }
1896matches:
1897 trace->ev_qualifier_ids.entries[nr_used++] = id;
1898 if (match_next == -1)
1899 continue;
1900
1901 while (1) {
1902 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1903 if (id < 0)
1904 break;
1905 if (nr_allocated == nr_used) {
1906 void *entries;
1907
1908 nr_allocated += 8;
1909 entries = realloc(trace->ev_qualifier_ids.entries,
1910 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1911 if (entries == NULL) {
1912 err = -ENOMEM;
1913 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1914 goto out_free;
1915 }
1916 trace->ev_qualifier_ids.entries = entries;
1917 }
1918 trace->ev_qualifier_ids.entries[nr_used++] = id;
1919 }
1920 }
1921
1922 trace->ev_qualifier_ids.nr = nr_used;
1923 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1924out:
1925 if (printed_invalid_prefix)
1926 pr_debug("\n");
1927 return err;
1928out_free:
1929 zfree(&trace->ev_qualifier_ids.entries);
1930 trace->ev_qualifier_ids.nr = 0;
1931 goto out;
1932}
1933
1934static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1935{
1936 bool in_ev_qualifier;
1937
1938 if (trace->ev_qualifier_ids.nr == 0)
1939 return true;
1940
1941 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1942 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1943
1944 if (in_ev_qualifier)
1945 return !trace->not_ev_qualifier;
1946
1947 return trace->not_ev_qualifier;
1948}
1949
1950/*
1951 * args is to be interpreted as a series of longs but we need to handle
1952 * 8-byte unaligned accesses. args points to raw_data within the event
1953 * and raw_data is guaranteed to be 8-byte unaligned because it is
1954 * preceded by raw_size which is a u32. So we need to copy args to a temp
1955 * variable to read it. Most notably this avoids extended load instructions
1956 * on unaligned addresses
1957 */
1958unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1959{
1960 unsigned long val;
1961 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1962
1963 memcpy(&val, p, sizeof(val));
1964 return val;
1965}
1966
1967static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1968 struct syscall_arg *arg)
1969{
1970 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1971 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1972
1973 return scnprintf(bf, size, "arg%d: ", arg->idx);
1974}
1975
1976/*
1977 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1978 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1979 * in tools/perf/trace/beauty/mount_flags.c
1980 */
1981static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1982{
1983 if (fmt && fmt->mask_val)
1984 return fmt->mask_val(arg, val);
1985
1986 return val;
1987}
1988
1989static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1990 struct syscall_arg *arg, unsigned long val)
1991{
1992 if (fmt && fmt->scnprintf) {
1993 arg->val = val;
1994 if (fmt->parm)
1995 arg->parm = fmt->parm;
1996 return fmt->scnprintf(bf, size, arg);
1997 }
1998 return scnprintf(bf, size, "%ld", val);
1999}
2000
2001static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
2002 unsigned char *args, void *augmented_args, int augmented_args_size,
2003 struct trace *trace, struct thread *thread)
2004{
2005 size_t printed = 0;
2006 unsigned long val;
2007 u8 bit = 1;
2008 struct syscall_arg arg = {
2009 .args = args,
2010 .augmented = {
2011 .size = augmented_args_size,
2012 .args = augmented_args,
2013 },
2014 .idx = 0,
2015 .mask = 0,
2016 .trace = trace,
2017 .thread = thread,
2018 .show_string_prefix = trace->show_string_prefix,
2019 };
2020 struct thread_trace *ttrace = thread__priv(thread);
2021
2022 /*
2023 * Things like fcntl will set this in its 'cmd' formatter to pick the
2024 * right formatter for the return value (an fd? file flags?), which is
2025 * not needed for syscalls that always return a given type, say an fd.
2026 */
2027 ttrace->ret_scnprintf = NULL;
2028
2029 if (sc->args != NULL) {
2030 struct tep_format_field *field;
2031
2032 for (field = sc->args; field;
2033 field = field->next, ++arg.idx, bit <<= 1) {
2034 if (arg.mask & bit)
2035 continue;
2036
2037 arg.fmt = &sc->arg_fmt[arg.idx];
2038 val = syscall_arg__val(&arg, arg.idx);
2039 /*
2040 * Some syscall args need some mask, most don't and
2041 * return val untouched.
2042 */
2043 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2044
2045 /*
2046 * Suppress this argument if its value is zero and
2047 * and we don't have a string associated in an
2048 * strarray for it.
2049 */
2050 if (val == 0 &&
2051 !trace->show_zeros &&
2052 !(sc->arg_fmt &&
2053 (sc->arg_fmt[arg.idx].show_zero ||
2054 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2055 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2056 sc->arg_fmt[arg.idx].parm))
2057 continue;
2058
2059 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2060
2061 if (trace->show_arg_names)
2062 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2063
2064 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2065 bf + printed, size - printed, &arg, val);
2066 }
2067 } else if (IS_ERR(sc->tp_format)) {
2068 /*
2069 * If we managed to read the tracepoint /format file, then we
2070 * may end up not having any args, like with gettid(), so only
2071 * print the raw args when we didn't manage to read it.
2072 */
2073 while (arg.idx < sc->nr_args) {
2074 if (arg.mask & bit)
2075 goto next_arg;
2076 val = syscall_arg__val(&arg, arg.idx);
2077 if (printed)
2078 printed += scnprintf(bf + printed, size - printed, ", ");
2079 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2080 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2081next_arg:
2082 ++arg.idx;
2083 bit <<= 1;
2084 }
2085 }
2086
2087 return printed;
2088}
2089
2090typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2091 union perf_event *event,
2092 struct perf_sample *sample);
2093
2094static struct syscall *trace__syscall_info(struct trace *trace,
2095 struct evsel *evsel, int id)
2096{
2097 int err = 0;
2098
2099 if (id < 0) {
2100
2101 /*
2102 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2103 * before that, leaving at a higher verbosity level till that is
2104 * explained. Reproduced with plain ftrace with:
2105 *
2106 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2107 * grep "NR -1 " /t/trace_pipe
2108 *
2109 * After generating some load on the machine.
2110 */
2111 if (verbose > 1) {
2112 static u64 n;
2113 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2114 id, evsel__name(evsel), ++n);
2115 }
2116 return NULL;
2117 }
2118
2119 err = -EINVAL;
2120
2121#ifdef HAVE_SYSCALL_TABLE_SUPPORT
2122 if (id > trace->sctbl->syscalls.max_id) {
2123#else
2124 if (id >= trace->sctbl->syscalls.max_id) {
2125 /*
2126 * With libaudit we don't know beforehand what is the max_id,
2127 * so we let trace__read_syscall_info() figure that out as we
2128 * go on reading syscalls.
2129 */
2130 err = trace__read_syscall_info(trace, id);
2131 if (err)
2132#endif
2133 goto out_cant_read;
2134 }
2135
2136 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2137 (err = trace__read_syscall_info(trace, id)) != 0)
2138 goto out_cant_read;
2139
2140 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
2141 goto out_cant_read;
2142
2143 return &trace->syscalls.table[id];
2144
2145out_cant_read:
2146 if (verbose > 0) {
2147 char sbuf[STRERR_BUFSIZE];
2148 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2149 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2150 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2151 fputs(" information\n", trace->output);
2152 }
2153 return NULL;
2154}
2155
2156struct syscall_stats {
2157 struct stats stats;
2158 u64 nr_failures;
2159 int max_errno;
2160 u32 *errnos;
2161};
2162
2163static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2164 int id, struct perf_sample *sample, long err, bool errno_summary)
2165{
2166 struct int_node *inode;
2167 struct syscall_stats *stats;
2168 u64 duration = 0;
2169
2170 inode = intlist__findnew(ttrace->syscall_stats, id);
2171 if (inode == NULL)
2172 return;
2173
2174 stats = inode->priv;
2175 if (stats == NULL) {
2176 stats = zalloc(sizeof(*stats));
2177 if (stats == NULL)
2178 return;
2179
2180 init_stats(&stats->stats);
2181 inode->priv = stats;
2182 }
2183
2184 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2185 duration = sample->time - ttrace->entry_time;
2186
2187 update_stats(&stats->stats, duration);
2188
2189 if (err < 0) {
2190 ++stats->nr_failures;
2191
2192 if (!errno_summary)
2193 return;
2194
2195 err = -err;
2196 if (err > stats->max_errno) {
2197 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2198
2199 if (new_errnos) {
2200 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2201 } else {
2202 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2203 thread__comm_str(thread), thread->pid_, thread->tid);
2204 return;
2205 }
2206
2207 stats->errnos = new_errnos;
2208 stats->max_errno = err;
2209 }
2210
2211 ++stats->errnos[err - 1];
2212 }
2213}
2214
2215static int trace__printf_interrupted_entry(struct trace *trace)
2216{
2217 struct thread_trace *ttrace;
2218 size_t printed;
2219 int len;
2220
2221 if (trace->failure_only || trace->current == NULL)
2222 return 0;
2223
2224 ttrace = thread__priv(trace->current);
2225
2226 if (!ttrace->entry_pending)
2227 return 0;
2228
2229 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2230 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2231
2232 if (len < trace->args_alignment - 4)
2233 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2234
2235 printed += fprintf(trace->output, " ...\n");
2236
2237 ttrace->entry_pending = false;
2238 ++trace->nr_events_printed;
2239
2240 return printed;
2241}
2242
2243static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2244 struct perf_sample *sample, struct thread *thread)
2245{
2246 int printed = 0;
2247
2248 if (trace->print_sample) {
2249 double ts = (double)sample->time / NSEC_PER_MSEC;
2250
2251 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2252 evsel__name(evsel), ts,
2253 thread__comm_str(thread),
2254 sample->pid, sample->tid, sample->cpu);
2255 }
2256
2257 return printed;
2258}
2259
2260static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2261{
2262 void *augmented_args = NULL;
2263 /*
2264 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2265 * and there we get all 6 syscall args plus the tracepoint common fields
2266 * that gets calculated at the start and the syscall_nr (another long).
2267 * So we check if that is the case and if so don't look after the
2268 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2269 * which is fixed.
2270 *
2271 * We'll revisit this later to pass s->args_size to the BPF augmenter
2272 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2273 * copies only what we need for each syscall, like what happens when we
2274 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2275 * traffic to just what is needed for each syscall.
2276 */
2277 int args_size = raw_augmented_args_size ?: sc->args_size;
2278
2279 *augmented_args_size = sample->raw_size - args_size;
2280 if (*augmented_args_size > 0)
2281 augmented_args = sample->raw_data + args_size;
2282
2283 return augmented_args;
2284}
2285
2286static void syscall__exit(struct syscall *sc)
2287{
2288 if (!sc)
2289 return;
2290
2291 free(sc->arg_fmt);
2292}
2293
2294static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2295 union perf_event *event __maybe_unused,
2296 struct perf_sample *sample)
2297{
2298 char *msg;
2299 void *args;
2300 int printed = 0;
2301 struct thread *thread;
2302 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2303 int augmented_args_size = 0;
2304 void *augmented_args = NULL;
2305 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2306 struct thread_trace *ttrace;
2307
2308 if (sc == NULL)
2309 return -1;
2310
2311 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2312 ttrace = thread__trace(thread, trace->output);
2313 if (ttrace == NULL)
2314 goto out_put;
2315
2316 trace__fprintf_sample(trace, evsel, sample, thread);
2317
2318 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2319
2320 if (ttrace->entry_str == NULL) {
2321 ttrace->entry_str = malloc(trace__entry_str_size);
2322 if (!ttrace->entry_str)
2323 goto out_put;
2324 }
2325
2326 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2327 trace__printf_interrupted_entry(trace);
2328 /*
2329 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2330 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2331 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2332 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2333 * so when handling, say the openat syscall, we end up getting 6 args for the
2334 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2335 * thinking that the extra 2 u64 args are the augmented filename, so just check
2336 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2337 */
2338 if (evsel != trace->syscalls.events.sys_enter)
2339 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2340 ttrace->entry_time = sample->time;
2341 msg = ttrace->entry_str;
2342 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2343
2344 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2345 args, augmented_args, augmented_args_size, trace, thread);
2346
2347 if (sc->is_exit) {
2348 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2349 int alignment = 0;
2350
2351 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2352 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2353 if (trace->args_alignment > printed)
2354 alignment = trace->args_alignment - printed;
2355 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2356 }
2357 } else {
2358 ttrace->entry_pending = true;
2359 /* See trace__vfs_getname & trace__sys_exit */
2360 ttrace->filename.pending_open = false;
2361 }
2362
2363 if (trace->current != thread) {
2364 thread__put(trace->current);
2365 trace->current = thread__get(thread);
2366 }
2367 err = 0;
2368out_put:
2369 thread__put(thread);
2370 return err;
2371}
2372
2373static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2374 struct perf_sample *sample)
2375{
2376 struct thread_trace *ttrace;
2377 struct thread *thread;
2378 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2379 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2380 char msg[1024];
2381 void *args, *augmented_args = NULL;
2382 int augmented_args_size;
2383
2384 if (sc == NULL)
2385 return -1;
2386
2387 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2388 ttrace = thread__trace(thread, trace->output);
2389 /*
2390 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2391 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2392 */
2393 if (ttrace == NULL)
2394 goto out_put;
2395
2396 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2397 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2398 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2399 fprintf(trace->output, "%s", msg);
2400 err = 0;
2401out_put:
2402 thread__put(thread);
2403 return err;
2404}
2405
2406static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2407 struct perf_sample *sample,
2408 struct callchain_cursor *cursor)
2409{
2410 struct addr_location al;
2411 int max_stack = evsel->core.attr.sample_max_stack ?
2412 evsel->core.attr.sample_max_stack :
2413 trace->max_stack;
2414 int err;
2415
2416 if (machine__resolve(trace->host, &al, sample) < 0)
2417 return -1;
2418
2419 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2420 addr_location__put(&al);
2421 return err;
2422}
2423
2424static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2425{
2426 /* TODO: user-configurable print_opts */
2427 const unsigned int print_opts = EVSEL__PRINT_SYM |
2428 EVSEL__PRINT_DSO |
2429 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2430
2431 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2432}
2433
2434static const char *errno_to_name(struct evsel *evsel, int err)
2435{
2436 struct perf_env *env = evsel__env(evsel);
2437 const char *arch_name = perf_env__arch(env);
2438
2439 return arch_syscalls__strerrno(arch_name, err);
2440}
2441
2442static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2443 union perf_event *event __maybe_unused,
2444 struct perf_sample *sample)
2445{
2446 long ret;
2447 u64 duration = 0;
2448 bool duration_calculated = false;
2449 struct thread *thread;
2450 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2451 int alignment = trace->args_alignment;
2452 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2453 struct thread_trace *ttrace;
2454
2455 if (sc == NULL)
2456 return -1;
2457
2458 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2459 ttrace = thread__trace(thread, trace->output);
2460 if (ttrace == NULL)
2461 goto out_put;
2462
2463 trace__fprintf_sample(trace, evsel, sample, thread);
2464
2465 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2466
2467 if (trace->summary)
2468 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2469
2470 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2471 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2472 ttrace->filename.pending_open = false;
2473 ++trace->stats.vfs_getname;
2474 }
2475
2476 if (ttrace->entry_time) {
2477 duration = sample->time - ttrace->entry_time;
2478 if (trace__filter_duration(trace, duration))
2479 goto out;
2480 duration_calculated = true;
2481 } else if (trace->duration_filter)
2482 goto out;
2483
2484 if (sample->callchain) {
2485 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2486 if (callchain_ret == 0) {
2487 if (callchain_cursor.nr < trace->min_stack)
2488 goto out;
2489 callchain_ret = 1;
2490 }
2491 }
2492
2493 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2494 goto out;
2495
2496 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2497
2498 if (ttrace->entry_pending) {
2499 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2500 } else {
2501 printed += fprintf(trace->output, " ... [");
2502 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2503 printed += 9;
2504 printed += fprintf(trace->output, "]: %s()", sc->name);
2505 }
2506
2507 printed++; /* the closing ')' */
2508
2509 if (alignment > printed)
2510 alignment -= printed;
2511 else
2512 alignment = 0;
2513
2514 fprintf(trace->output, ")%*s= ", alignment, " ");
2515
2516 if (sc->fmt == NULL) {
2517 if (ret < 0)
2518 goto errno_print;
2519signed_print:
2520 fprintf(trace->output, "%ld", ret);
2521 } else if (ret < 0) {
2522errno_print: {
2523 char bf[STRERR_BUFSIZE];
2524 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2525 *e = errno_to_name(evsel, -ret);
2526
2527 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2528 }
2529 } else if (ret == 0 && sc->fmt->timeout)
2530 fprintf(trace->output, "0 (Timeout)");
2531 else if (ttrace->ret_scnprintf) {
2532 char bf[1024];
2533 struct syscall_arg arg = {
2534 .val = ret,
2535 .thread = thread,
2536 .trace = trace,
2537 };
2538 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2539 ttrace->ret_scnprintf = NULL;
2540 fprintf(trace->output, "%s", bf);
2541 } else if (sc->fmt->hexret)
2542 fprintf(trace->output, "%#lx", ret);
2543 else if (sc->fmt->errpid) {
2544 struct thread *child = machine__find_thread(trace->host, ret, ret);
2545
2546 if (child != NULL) {
2547 fprintf(trace->output, "%ld", ret);
2548 if (child->comm_set)
2549 fprintf(trace->output, " (%s)", thread__comm_str(child));
2550 thread__put(child);
2551 }
2552 } else
2553 goto signed_print;
2554
2555 fputc('\n', trace->output);
2556
2557 /*
2558 * We only consider an 'event' for the sake of --max-events a non-filtered
2559 * sys_enter + sys_exit and other tracepoint events.
2560 */
2561 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2562 interrupted = true;
2563
2564 if (callchain_ret > 0)
2565 trace__fprintf_callchain(trace, sample);
2566 else if (callchain_ret < 0)
2567 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2568out:
2569 ttrace->entry_pending = false;
2570 err = 0;
2571out_put:
2572 thread__put(thread);
2573 return err;
2574}
2575
2576static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2577 union perf_event *event __maybe_unused,
2578 struct perf_sample *sample)
2579{
2580 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2581 struct thread_trace *ttrace;
2582 size_t filename_len, entry_str_len, to_move;
2583 ssize_t remaining_space;
2584 char *pos;
2585 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2586
2587 if (!thread)
2588 goto out;
2589
2590 ttrace = thread__priv(thread);
2591 if (!ttrace)
2592 goto out_put;
2593
2594 filename_len = strlen(filename);
2595 if (filename_len == 0)
2596 goto out_put;
2597
2598 if (ttrace->filename.namelen < filename_len) {
2599 char *f = realloc(ttrace->filename.name, filename_len + 1);
2600
2601 if (f == NULL)
2602 goto out_put;
2603
2604 ttrace->filename.namelen = filename_len;
2605 ttrace->filename.name = f;
2606 }
2607
2608 strcpy(ttrace->filename.name, filename);
2609 ttrace->filename.pending_open = true;
2610
2611 if (!ttrace->filename.ptr)
2612 goto out_put;
2613
2614 entry_str_len = strlen(ttrace->entry_str);
2615 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2616 if (remaining_space <= 0)
2617 goto out_put;
2618
2619 if (filename_len > (size_t)remaining_space) {
2620 filename += filename_len - remaining_space;
2621 filename_len = remaining_space;
2622 }
2623
2624 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2625 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2626 memmove(pos + filename_len, pos, to_move);
2627 memcpy(pos, filename, filename_len);
2628
2629 ttrace->filename.ptr = 0;
2630 ttrace->filename.entry_str_pos = 0;
2631out_put:
2632 thread__put(thread);
2633out:
2634 return 0;
2635}
2636
2637static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2638 union perf_event *event __maybe_unused,
2639 struct perf_sample *sample)
2640{
2641 u64 runtime = evsel__intval(evsel, sample, "runtime");
2642 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2643 struct thread *thread = machine__findnew_thread(trace->host,
2644 sample->pid,
2645 sample->tid);
2646 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2647
2648 if (ttrace == NULL)
2649 goto out_dump;
2650
2651 ttrace->runtime_ms += runtime_ms;
2652 trace->runtime_ms += runtime_ms;
2653out_put:
2654 thread__put(thread);
2655 return 0;
2656
2657out_dump:
2658 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2659 evsel->name,
2660 evsel__strval(evsel, sample, "comm"),
2661 (pid_t)evsel__intval(evsel, sample, "pid"),
2662 runtime,
2663 evsel__intval(evsel, sample, "vruntime"));
2664 goto out_put;
2665}
2666
2667static int bpf_output__printer(enum binary_printer_ops op,
2668 unsigned int val, void *extra __maybe_unused, FILE *fp)
2669{
2670 unsigned char ch = (unsigned char)val;
2671
2672 switch (op) {
2673 case BINARY_PRINT_CHAR_DATA:
2674 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2675 case BINARY_PRINT_DATA_BEGIN:
2676 case BINARY_PRINT_LINE_BEGIN:
2677 case BINARY_PRINT_ADDR:
2678 case BINARY_PRINT_NUM_DATA:
2679 case BINARY_PRINT_NUM_PAD:
2680 case BINARY_PRINT_SEP:
2681 case BINARY_PRINT_CHAR_PAD:
2682 case BINARY_PRINT_LINE_END:
2683 case BINARY_PRINT_DATA_END:
2684 default:
2685 break;
2686 }
2687
2688 return 0;
2689}
2690
2691static void bpf_output__fprintf(struct trace *trace,
2692 struct perf_sample *sample)
2693{
2694 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2695 bpf_output__printer, NULL, trace->output);
2696 ++trace->nr_events_printed;
2697}
2698
2699static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2700 struct thread *thread, void *augmented_args, int augmented_args_size)
2701{
2702 char bf[2048];
2703 size_t size = sizeof(bf);
2704 struct tep_format_field *field = evsel->tp_format->format.fields;
2705 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2706 size_t printed = 0;
2707 unsigned long val;
2708 u8 bit = 1;
2709 struct syscall_arg syscall_arg = {
2710 .augmented = {
2711 .size = augmented_args_size,
2712 .args = augmented_args,
2713 },
2714 .idx = 0,
2715 .mask = 0,
2716 .trace = trace,
2717 .thread = thread,
2718 .show_string_prefix = trace->show_string_prefix,
2719 };
2720
2721 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2722 if (syscall_arg.mask & bit)
2723 continue;
2724
2725 syscall_arg.len = 0;
2726 syscall_arg.fmt = arg;
2727 if (field->flags & TEP_FIELD_IS_ARRAY) {
2728 int offset = field->offset;
2729
2730 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2731 offset = format_field__intval(field, sample, evsel->needs_swap);
2732 syscall_arg.len = offset >> 16;
2733 offset &= 0xffff;
2734#ifdef HAVE_LIBTRACEEVENT_TEP_FIELD_IS_RELATIVE
2735 if (field->flags & TEP_FIELD_IS_RELATIVE)
2736 offset += field->offset + field->size;
2737#endif
2738 }
2739
2740 val = (uintptr_t)(sample->raw_data + offset);
2741 } else
2742 val = format_field__intval(field, sample, evsel->needs_swap);
2743 /*
2744 * Some syscall args need some mask, most don't and
2745 * return val untouched.
2746 */
2747 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2748
2749 /*
2750 * Suppress this argument if its value is zero and
2751 * we don't have a string associated in an
2752 * strarray for it.
2753 */
2754 if (val == 0 &&
2755 !trace->show_zeros &&
2756 !((arg->show_zero ||
2757 arg->scnprintf == SCA_STRARRAY ||
2758 arg->scnprintf == SCA_STRARRAYS) &&
2759 arg->parm))
2760 continue;
2761
2762 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2763
2764 if (trace->show_arg_names)
2765 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2766
2767 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2768 }
2769
2770 return printed + fprintf(trace->output, "%s", bf);
2771}
2772
2773static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2774 union perf_event *event __maybe_unused,
2775 struct perf_sample *sample)
2776{
2777 struct thread *thread;
2778 int callchain_ret = 0;
2779 /*
2780 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2781 * this event's max_events having been hit and this is an entry coming
2782 * from the ring buffer that we should discard, since the max events
2783 * have already been considered/printed.
2784 */
2785 if (evsel->disabled)
2786 return 0;
2787
2788 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2789
2790 if (sample->callchain) {
2791 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2792 if (callchain_ret == 0) {
2793 if (callchain_cursor.nr < trace->min_stack)
2794 goto out;
2795 callchain_ret = 1;
2796 }
2797 }
2798
2799 trace__printf_interrupted_entry(trace);
2800 trace__fprintf_tstamp(trace, sample->time, trace->output);
2801
2802 if (trace->trace_syscalls && trace->show_duration)
2803 fprintf(trace->output, "( ): ");
2804
2805 if (thread)
2806 trace__fprintf_comm_tid(trace, thread, trace->output);
2807
2808 if (evsel == trace->syscalls.events.augmented) {
2809 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2810 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2811
2812 if (sc) {
2813 fprintf(trace->output, "%s(", sc->name);
2814 trace__fprintf_sys_enter(trace, evsel, sample);
2815 fputc(')', trace->output);
2816 goto newline;
2817 }
2818
2819 /*
2820 * XXX: Not having the associated syscall info or not finding/adding
2821 * the thread should never happen, but if it does...
2822 * fall thru and print it as a bpf_output event.
2823 */
2824 }
2825
2826 fprintf(trace->output, "%s(", evsel->name);
2827
2828 if (evsel__is_bpf_output(evsel)) {
2829 bpf_output__fprintf(trace, sample);
2830 } else if (evsel->tp_format) {
2831 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2832 trace__fprintf_sys_enter(trace, evsel, sample)) {
2833 if (trace->libtraceevent_print) {
2834 event_format__fprintf(evsel->tp_format, sample->cpu,
2835 sample->raw_data, sample->raw_size,
2836 trace->output);
2837 } else {
2838 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2839 }
2840 }
2841 }
2842
2843newline:
2844 fprintf(trace->output, ")\n");
2845
2846 if (callchain_ret > 0)
2847 trace__fprintf_callchain(trace, sample);
2848 else if (callchain_ret < 0)
2849 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2850
2851 ++trace->nr_events_printed;
2852
2853 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2854 evsel__disable(evsel);
2855 evsel__close(evsel);
2856 }
2857out:
2858 thread__put(thread);
2859 return 0;
2860}
2861
2862static void print_location(FILE *f, struct perf_sample *sample,
2863 struct addr_location *al,
2864 bool print_dso, bool print_sym)
2865{
2866
2867 if ((verbose > 0 || print_dso) && al->map)
2868 fprintf(f, "%s@", al->map->dso->long_name);
2869
2870 if ((verbose > 0 || print_sym) && al->sym)
2871 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2872 al->addr - al->sym->start);
2873 else if (al->map)
2874 fprintf(f, "0x%" PRIx64, al->addr);
2875 else
2876 fprintf(f, "0x%" PRIx64, sample->addr);
2877}
2878
2879static int trace__pgfault(struct trace *trace,
2880 struct evsel *evsel,
2881 union perf_event *event __maybe_unused,
2882 struct perf_sample *sample)
2883{
2884 struct thread *thread;
2885 struct addr_location al;
2886 char map_type = 'd';
2887 struct thread_trace *ttrace;
2888 int err = -1;
2889 int callchain_ret = 0;
2890
2891 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2892
2893 if (sample->callchain) {
2894 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2895 if (callchain_ret == 0) {
2896 if (callchain_cursor.nr < trace->min_stack)
2897 goto out_put;
2898 callchain_ret = 1;
2899 }
2900 }
2901
2902 ttrace = thread__trace(thread, trace->output);
2903 if (ttrace == NULL)
2904 goto out_put;
2905
2906 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2907 ttrace->pfmaj++;
2908 else
2909 ttrace->pfmin++;
2910
2911 if (trace->summary_only)
2912 goto out;
2913
2914 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2915
2916 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2917
2918 fprintf(trace->output, "%sfault [",
2919 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2920 "maj" : "min");
2921
2922 print_location(trace->output, sample, &al, false, true);
2923
2924 fprintf(trace->output, "] => ");
2925
2926 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2927
2928 if (!al.map) {
2929 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2930
2931 if (al.map)
2932 map_type = 'x';
2933 else
2934 map_type = '?';
2935 }
2936
2937 print_location(trace->output, sample, &al, true, false);
2938
2939 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2940
2941 if (callchain_ret > 0)
2942 trace__fprintf_callchain(trace, sample);
2943 else if (callchain_ret < 0)
2944 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2945
2946 ++trace->nr_events_printed;
2947out:
2948 err = 0;
2949out_put:
2950 thread__put(thread);
2951 return err;
2952}
2953
2954static void trace__set_base_time(struct trace *trace,
2955 struct evsel *evsel,
2956 struct perf_sample *sample)
2957{
2958 /*
2959 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2960 * and don't use sample->time unconditionally, we may end up having
2961 * some other event in the future without PERF_SAMPLE_TIME for good
2962 * reason, i.e. we may not be interested in its timestamps, just in
2963 * it taking place, picking some piece of information when it
2964 * appears in our event stream (vfs_getname comes to mind).
2965 */
2966 if (trace->base_time == 0 && !trace->full_time &&
2967 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2968 trace->base_time = sample->time;
2969}
2970
2971static int trace__process_sample(struct perf_tool *tool,
2972 union perf_event *event,
2973 struct perf_sample *sample,
2974 struct evsel *evsel,
2975 struct machine *machine __maybe_unused)
2976{
2977 struct trace *trace = container_of(tool, struct trace, tool);
2978 struct thread *thread;
2979 int err = 0;
2980
2981 tracepoint_handler handler = evsel->handler;
2982
2983 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2984 if (thread && thread__is_filtered(thread))
2985 goto out;
2986
2987 trace__set_base_time(trace, evsel, sample);
2988
2989 if (handler) {
2990 ++trace->nr_events;
2991 handler(trace, evsel, event, sample);
2992 }
2993out:
2994 thread__put(thread);
2995 return err;
2996}
2997
2998static int trace__record(struct trace *trace, int argc, const char **argv)
2999{
3000 unsigned int rec_argc, i, j;
3001 const char **rec_argv;
3002 const char * const record_args[] = {
3003 "record",
3004 "-R",
3005 "-m", "1024",
3006 "-c", "1",
3007 };
3008 pid_t pid = getpid();
3009 char *filter = asprintf__tp_filter_pids(1, &pid);
3010 const char * const sc_args[] = { "-e", };
3011 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
3012 const char * const majpf_args[] = { "-e", "major-faults" };
3013 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
3014 const char * const minpf_args[] = { "-e", "minor-faults" };
3015 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
3016 int err = -1;
3017
3018 /* +3 is for the event string below and the pid filter */
3019 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3020 majpf_args_nr + minpf_args_nr + argc;
3021 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3022
3023 if (rec_argv == NULL || filter == NULL)
3024 goto out_free;
3025
3026 j = 0;
3027 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3028 rec_argv[j++] = record_args[i];
3029
3030 if (trace->trace_syscalls) {
3031 for (i = 0; i < sc_args_nr; i++)
3032 rec_argv[j++] = sc_args[i];
3033
3034 /* event string may be different for older kernels - e.g., RHEL6 */
3035 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3036 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3037 else if (is_valid_tracepoint("syscalls:sys_enter"))
3038 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3039 else {
3040 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3041 goto out_free;
3042 }
3043 }
3044
3045 rec_argv[j++] = "--filter";
3046 rec_argv[j++] = filter;
3047
3048 if (trace->trace_pgfaults & TRACE_PFMAJ)
3049 for (i = 0; i < majpf_args_nr; i++)
3050 rec_argv[j++] = majpf_args[i];
3051
3052 if (trace->trace_pgfaults & TRACE_PFMIN)
3053 for (i = 0; i < minpf_args_nr; i++)
3054 rec_argv[j++] = minpf_args[i];
3055
3056 for (i = 0; i < (unsigned int)argc; i++)
3057 rec_argv[j++] = argv[i];
3058
3059 err = cmd_record(j, rec_argv);
3060out_free:
3061 free(filter);
3062 free(rec_argv);
3063 return err;
3064}
3065
3066static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3067
3068static bool evlist__add_vfs_getname(struct evlist *evlist)
3069{
3070 bool found = false;
3071 struct evsel *evsel, *tmp;
3072 struct parse_events_error err;
3073 int ret;
3074
3075 parse_events_error__init(&err);
3076 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3077 parse_events_error__exit(&err);
3078 if (ret)
3079 return false;
3080
3081 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3082 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3083 continue;
3084
3085 if (evsel__field(evsel, "pathname")) {
3086 evsel->handler = trace__vfs_getname;
3087 found = true;
3088 continue;
3089 }
3090
3091 list_del_init(&evsel->core.node);
3092 evsel->evlist = NULL;
3093 evsel__delete(evsel);
3094 }
3095
3096 return found;
3097}
3098
3099static struct evsel *evsel__new_pgfault(u64 config)
3100{
3101 struct evsel *evsel;
3102 struct perf_event_attr attr = {
3103 .type = PERF_TYPE_SOFTWARE,
3104 .mmap_data = 1,
3105 };
3106
3107 attr.config = config;
3108 attr.sample_period = 1;
3109
3110 event_attr_init(&attr);
3111
3112 evsel = evsel__new(&attr);
3113 if (evsel)
3114 evsel->handler = trace__pgfault;
3115
3116 return evsel;
3117}
3118
3119static void evlist__free_syscall_tp_fields(struct evlist *evlist)
3120{
3121 struct evsel *evsel;
3122
3123 evlist__for_each_entry(evlist, evsel) {
3124 struct evsel_trace *et = evsel->priv;
3125
3126 if (!et || !evsel->tp_format || strcmp(evsel->tp_format->system, "syscalls"))
3127 continue;
3128
3129 free(et->fmt);
3130 free(et);
3131 }
3132}
3133
3134static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3135{
3136 const u32 type = event->header.type;
3137 struct evsel *evsel;
3138
3139 if (type != PERF_RECORD_SAMPLE) {
3140 trace__process_event(trace, trace->host, event, sample);
3141 return;
3142 }
3143
3144 evsel = evlist__id2evsel(trace->evlist, sample->id);
3145 if (evsel == NULL) {
3146 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3147 return;
3148 }
3149
3150 if (evswitch__discard(&trace->evswitch, evsel))
3151 return;
3152
3153 trace__set_base_time(trace, evsel, sample);
3154
3155 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3156 sample->raw_data == NULL) {
3157 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3158 evsel__name(evsel), sample->tid,
3159 sample->cpu, sample->raw_size);
3160 } else {
3161 tracepoint_handler handler = evsel->handler;
3162 handler(trace, evsel, event, sample);
3163 }
3164
3165 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3166 interrupted = true;
3167}
3168
3169static int trace__add_syscall_newtp(struct trace *trace)
3170{
3171 int ret = -1;
3172 struct evlist *evlist = trace->evlist;
3173 struct evsel *sys_enter, *sys_exit;
3174
3175 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3176 if (sys_enter == NULL)
3177 goto out;
3178
3179 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3180 goto out_delete_sys_enter;
3181
3182 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3183 if (sys_exit == NULL)
3184 goto out_delete_sys_enter;
3185
3186 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3187 goto out_delete_sys_exit;
3188
3189 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3190 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3191
3192 evlist__add(evlist, sys_enter);
3193 evlist__add(evlist, sys_exit);
3194
3195 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3196 /*
3197 * We're interested only in the user space callchain
3198 * leading to the syscall, allow overriding that for
3199 * debugging reasons using --kernel_syscall_callchains
3200 */
3201 sys_exit->core.attr.exclude_callchain_kernel = 1;
3202 }
3203
3204 trace->syscalls.events.sys_enter = sys_enter;
3205 trace->syscalls.events.sys_exit = sys_exit;
3206
3207 ret = 0;
3208out:
3209 return ret;
3210
3211out_delete_sys_exit:
3212 evsel__delete_priv(sys_exit);
3213out_delete_sys_enter:
3214 evsel__delete_priv(sys_enter);
3215 goto out;
3216}
3217
3218static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3219{
3220 int err = -1;
3221 struct evsel *sys_exit;
3222 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3223 trace->ev_qualifier_ids.nr,
3224 trace->ev_qualifier_ids.entries);
3225
3226 if (filter == NULL)
3227 goto out_enomem;
3228
3229 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3230 sys_exit = trace->syscalls.events.sys_exit;
3231 err = evsel__append_tp_filter(sys_exit, filter);
3232 }
3233
3234 free(filter);
3235out:
3236 return err;
3237out_enomem:
3238 errno = ENOMEM;
3239 goto out;
3240}
3241
3242#ifdef HAVE_LIBBPF_SUPPORT
3243static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3244{
3245 if (trace->bpf_obj == NULL)
3246 return NULL;
3247
3248 return bpf_object__find_map_by_name(trace->bpf_obj, name);
3249}
3250
3251static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3252{
3253 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
3254}
3255
3256static void trace__set_bpf_map_syscalls(struct trace *trace)
3257{
3258 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
3259 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
3260}
3261
3262static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3263{
3264 struct bpf_program *pos, *prog = NULL;
3265 const char *sec_name;
3266
3267 if (trace->bpf_obj == NULL)
3268 return NULL;
3269
3270 bpf_object__for_each_program(pos, trace->bpf_obj) {
3271 sec_name = bpf_program__section_name(pos);
3272 if (sec_name && !strcmp(sec_name, name)) {
3273 prog = pos;
3274 break;
3275 }
3276 }
3277
3278 return prog;
3279}
3280
3281static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3282 const char *prog_name, const char *type)
3283{
3284 struct bpf_program *prog;
3285
3286 if (prog_name == NULL) {
3287 char default_prog_name[256];
3288 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3289 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3290 if (prog != NULL)
3291 goto out_found;
3292 if (sc->fmt && sc->fmt->alias) {
3293 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3294 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3295 if (prog != NULL)
3296 goto out_found;
3297 }
3298 goto out_unaugmented;
3299 }
3300
3301 prog = trace__find_bpf_program_by_title(trace, prog_name);
3302
3303 if (prog != NULL) {
3304out_found:
3305 return prog;
3306 }
3307
3308 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3309 prog_name, type, sc->name);
3310out_unaugmented:
3311 return trace->syscalls.unaugmented_prog;
3312}
3313
3314static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3315{
3316 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3317
3318 if (sc == NULL)
3319 return;
3320
3321 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3322 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3323}
3324
3325static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3326{
3327 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3328 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3329}
3330
3331static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3332{
3333 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3334 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3335}
3336
3337static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3338{
3339 struct tep_format_field *field, *candidate_field;
3340 int id;
3341
3342 /*
3343 * We're only interested in syscalls that have a pointer:
3344 */
3345 for (field = sc->args; field; field = field->next) {
3346 if (field->flags & TEP_FIELD_IS_POINTER)
3347 goto try_to_find_pair;
3348 }
3349
3350 return NULL;
3351
3352try_to_find_pair:
3353 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3354 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3355 struct bpf_program *pair_prog;
3356 bool is_candidate = false;
3357
3358 if (pair == NULL || pair == sc ||
3359 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3360 continue;
3361
3362 for (field = sc->args, candidate_field = pair->args;
3363 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3364 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3365 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3366
3367 if (is_pointer) {
3368 if (!candidate_is_pointer) {
3369 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3370 continue;
3371 }
3372 } else {
3373 if (candidate_is_pointer) {
3374 // The candidate might copy a pointer we don't have, skip it.
3375 goto next_candidate;
3376 }
3377 continue;
3378 }
3379
3380 if (strcmp(field->type, candidate_field->type))
3381 goto next_candidate;
3382
3383 is_candidate = true;
3384 }
3385
3386 if (!is_candidate)
3387 goto next_candidate;
3388
3389 /*
3390 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3391 * then it may be collecting that and we then can't use it, as it would collect
3392 * more than what is common to the two syscalls.
3393 */
3394 if (candidate_field) {
3395 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3396 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3397 goto next_candidate;
3398 }
3399
3400 pair_prog = pair->bpf_prog.sys_enter;
3401 /*
3402 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3403 * have been searched for, so search it here and if it returns the
3404 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3405 * program for a filtered syscall on a non-filtered one.
3406 *
3407 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3408 * useful for "renameat2".
3409 */
3410 if (pair_prog == NULL) {
3411 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3412 if (pair_prog == trace->syscalls.unaugmented_prog)
3413 goto next_candidate;
3414 }
3415
3416 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3417 return pair_prog;
3418 next_candidate:
3419 continue;
3420 }
3421
3422 return NULL;
3423}
3424
3425static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3426{
3427 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3428 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3429 int err = 0, key;
3430
3431 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3432 int prog_fd;
3433
3434 if (!trace__syscall_enabled(trace, key))
3435 continue;
3436
3437 trace__init_syscall_bpf_progs(trace, key);
3438
3439 // It'll get at least the "!raw_syscalls:unaugmented"
3440 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3441 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3442 if (err)
3443 break;
3444 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3445 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3446 if (err)
3447 break;
3448 }
3449
3450 /*
3451 * Now lets do a second pass looking for enabled syscalls without
3452 * an augmenter that have a signature that is a superset of another
3453 * syscall with an augmenter so that we can auto-reuse it.
3454 *
3455 * I.e. if we have an augmenter for the "open" syscall that has
3456 * this signature:
3457 *
3458 * int open(const char *pathname, int flags, mode_t mode);
3459 *
3460 * I.e. that will collect just the first string argument, then we
3461 * can reuse it for the 'creat' syscall, that has this signature:
3462 *
3463 * int creat(const char *pathname, mode_t mode);
3464 *
3465 * and for:
3466 *
3467 * int stat(const char *pathname, struct stat *statbuf);
3468 * int lstat(const char *pathname, struct stat *statbuf);
3469 *
3470 * Because the 'open' augmenter will collect the first arg as a string,
3471 * and leave alone all the other args, which already helps with
3472 * beautifying 'stat' and 'lstat''s pathname arg.
3473 *
3474 * Then, in time, when 'stat' gets an augmenter that collects both
3475 * first and second arg (this one on the raw_syscalls:sys_exit prog
3476 * array tail call, then that one will be used.
3477 */
3478 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3479 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3480 struct bpf_program *pair_prog;
3481 int prog_fd;
3482
3483 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3484 continue;
3485
3486 /*
3487 * For now we're just reusing the sys_enter prog, and if it
3488 * already has an augmenter, we don't need to find one.
3489 */
3490 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3491 continue;
3492
3493 /*
3494 * Look at all the other syscalls for one that has a signature
3495 * that is close enough that we can share:
3496 */
3497 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3498 if (pair_prog == NULL)
3499 continue;
3500
3501 sc->bpf_prog.sys_enter = pair_prog;
3502
3503 /*
3504 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3505 * with the fd for the program we're reusing:
3506 */
3507 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3508 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3509 if (err)
3510 break;
3511 }
3512
3513
3514 return err;
3515}
3516
3517static void trace__delete_augmented_syscalls(struct trace *trace)
3518{
3519 struct evsel *evsel, *tmp;
3520
3521 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3522 evsel__delete(trace->syscalls.events.augmented);
3523 trace->syscalls.events.augmented = NULL;
3524
3525 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3526 if (evsel->bpf_obj == trace->bpf_obj) {
3527 evlist__remove(trace->evlist, evsel);
3528 evsel__delete(evsel);
3529 }
3530
3531 }
3532
3533 bpf_object__close(trace->bpf_obj);
3534 trace->bpf_obj = NULL;
3535}
3536#else // HAVE_LIBBPF_SUPPORT
3537static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
3538 const char *name __maybe_unused)
3539{
3540 return NULL;
3541}
3542
3543static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
3544{
3545}
3546
3547static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
3548{
3549}
3550
3551static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3552 const char *name __maybe_unused)
3553{
3554 return NULL;
3555}
3556
3557static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3558{
3559 return 0;
3560}
3561
3562static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3563{
3564}
3565#endif // HAVE_LIBBPF_SUPPORT
3566
3567static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3568{
3569 struct evsel *evsel;
3570
3571 evlist__for_each_entry(trace->evlist, evsel) {
3572 if (evsel == trace->syscalls.events.augmented ||
3573 evsel->bpf_obj == trace->bpf_obj)
3574 continue;
3575
3576 return false;
3577 }
3578
3579 return true;
3580}
3581
3582static int trace__set_ev_qualifier_filter(struct trace *trace)
3583{
3584 if (trace->syscalls.events.sys_enter)
3585 return trace__set_ev_qualifier_tp_filter(trace);
3586 return 0;
3587}
3588
3589static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3590 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3591{
3592 int err = 0;
3593#ifdef HAVE_LIBBPF_SUPPORT
3594 bool value = true;
3595 int map_fd = bpf_map__fd(map);
3596 size_t i;
3597
3598 for (i = 0; i < npids; ++i) {
3599 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3600 if (err)
3601 break;
3602 }
3603#endif
3604 return err;
3605}
3606
3607static int trace__set_filter_loop_pids(struct trace *trace)
3608{
3609 unsigned int nr = 1, err;
3610 pid_t pids[32] = {
3611 getpid(),
3612 };
3613 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3614
3615 while (thread && nr < ARRAY_SIZE(pids)) {
3616 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3617
3618 if (parent == NULL)
3619 break;
3620
3621 if (!strcmp(thread__comm_str(parent), "sshd") ||
3622 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3623 pids[nr++] = parent->tid;
3624 break;
3625 }
3626 thread = parent;
3627 }
3628
3629 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3630 if (!err && trace->filter_pids.map)
3631 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3632
3633 return err;
3634}
3635
3636static int trace__set_filter_pids(struct trace *trace)
3637{
3638 int err = 0;
3639 /*
3640 * Better not use !target__has_task() here because we need to cover the
3641 * case where no threads were specified in the command line, but a
3642 * workload was, and in that case we will fill in the thread_map when
3643 * we fork the workload in evlist__prepare_workload.
3644 */
3645 if (trace->filter_pids.nr > 0) {
3646 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3647 trace->filter_pids.entries);
3648 if (!err && trace->filter_pids.map) {
3649 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3650 trace->filter_pids.entries);
3651 }
3652 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3653 err = trace__set_filter_loop_pids(trace);
3654 }
3655
3656 return err;
3657}
3658
3659static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3660{
3661 struct evlist *evlist = trace->evlist;
3662 struct perf_sample sample;
3663 int err = evlist__parse_sample(evlist, event, &sample);
3664
3665 if (err)
3666 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3667 else
3668 trace__handle_event(trace, event, &sample);
3669
3670 return 0;
3671}
3672
3673static int __trace__flush_events(struct trace *trace)
3674{
3675 u64 first = ordered_events__first_time(&trace->oe.data);
3676 u64 flush = trace->oe.last - NSEC_PER_SEC;
3677
3678 /* Is there some thing to flush.. */
3679 if (first && first < flush)
3680 return ordered_events__flush_time(&trace->oe.data, flush);
3681
3682 return 0;
3683}
3684
3685static int trace__flush_events(struct trace *trace)
3686{
3687 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3688}
3689
3690static int trace__deliver_event(struct trace *trace, union perf_event *event)
3691{
3692 int err;
3693
3694 if (!trace->sort_events)
3695 return __trace__deliver_event(trace, event);
3696
3697 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3698 if (err && err != -1)
3699 return err;
3700
3701 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL);
3702 if (err)
3703 return err;
3704
3705 return trace__flush_events(trace);
3706}
3707
3708static int ordered_events__deliver_event(struct ordered_events *oe,
3709 struct ordered_event *event)
3710{
3711 struct trace *trace = container_of(oe, struct trace, oe.data);
3712
3713 return __trace__deliver_event(trace, event->event);
3714}
3715
3716static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3717{
3718 struct tep_format_field *field;
3719 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3720
3721 if (evsel->tp_format == NULL || fmt == NULL)
3722 return NULL;
3723
3724 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3725 if (strcmp(field->name, arg) == 0)
3726 return fmt;
3727
3728 return NULL;
3729}
3730
3731static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3732{
3733 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3734
3735 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3736 char *right = tok + 1, *right_end;
3737
3738 if (*right == '=')
3739 ++right;
3740
3741 while (isspace(*right))
3742 ++right;
3743
3744 if (*right == '\0')
3745 break;
3746
3747 while (!isalpha(*left))
3748 if (++left == tok) {
3749 /*
3750 * Bail out, can't find the name of the argument that is being
3751 * used in the filter, let it try to set this filter, will fail later.
3752 */
3753 return 0;
3754 }
3755
3756 right_end = right + 1;
3757 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3758 ++right_end;
3759
3760 if (isalpha(*right)) {
3761 struct syscall_arg_fmt *fmt;
3762 int left_size = tok - left,
3763 right_size = right_end - right;
3764 char arg[128];
3765
3766 while (isspace(left[left_size - 1]))
3767 --left_size;
3768
3769 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3770
3771 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3772 if (fmt == NULL) {
3773 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3774 arg, evsel->name, evsel->filter);
3775 return -1;
3776 }
3777
3778 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3779 arg, (int)(right - tok), tok, right_size, right);
3780
3781 if (fmt->strtoul) {
3782 u64 val;
3783 struct syscall_arg syscall_arg = {
3784 .parm = fmt->parm,
3785 };
3786
3787 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3788 char *n, expansion[19];
3789 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3790 int expansion_offset = right - new_filter;
3791
3792 pr_debug("%s", expansion);
3793
3794 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3795 pr_debug(" out of memory!\n");
3796 free(new_filter);
3797 return -1;
3798 }
3799 if (new_filter != evsel->filter)
3800 free(new_filter);
3801 left = n + expansion_offset + expansion_lenght;
3802 new_filter = n;
3803 } else {
3804 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3805 right_size, right, arg, evsel->name, evsel->filter);
3806 return -1;
3807 }
3808 } else {
3809 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3810 arg, evsel->name, evsel->filter);
3811 return -1;
3812 }
3813
3814 pr_debug("\n");
3815 } else {
3816 left = right_end;
3817 }
3818 }
3819
3820 if (new_filter != evsel->filter) {
3821 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3822 evsel__set_filter(evsel, new_filter);
3823 free(new_filter);
3824 }
3825
3826 return 0;
3827}
3828
3829static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3830{
3831 struct evlist *evlist = trace->evlist;
3832 struct evsel *evsel;
3833
3834 evlist__for_each_entry(evlist, evsel) {
3835 if (evsel->filter == NULL)
3836 continue;
3837
3838 if (trace__expand_filter(trace, evsel)) {
3839 *err_evsel = evsel;
3840 return -1;
3841 }
3842 }
3843
3844 return 0;
3845}
3846
3847static int trace__run(struct trace *trace, int argc, const char **argv)
3848{
3849 struct evlist *evlist = trace->evlist;
3850 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3851 int err = -1, i;
3852 unsigned long before;
3853 const bool forks = argc > 0;
3854 bool draining = false;
3855
3856 trace->live = true;
3857
3858 if (!trace->raw_augmented_syscalls) {
3859 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3860 goto out_error_raw_syscalls;
3861
3862 if (trace->trace_syscalls)
3863 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3864 }
3865
3866 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3867 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3868 if (pgfault_maj == NULL)
3869 goto out_error_mem;
3870 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3871 evlist__add(evlist, pgfault_maj);
3872 }
3873
3874 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3875 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3876 if (pgfault_min == NULL)
3877 goto out_error_mem;
3878 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3879 evlist__add(evlist, pgfault_min);
3880 }
3881
3882 /* Enable ignoring missing threads when -u/-p option is defined. */
3883 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid;
3884
3885 if (trace->sched &&
3886 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3887 goto out_error_sched_stat_runtime;
3888 /*
3889 * If a global cgroup was set, apply it to all the events without an
3890 * explicit cgroup. I.e.:
3891 *
3892 * trace -G A -e sched:*switch
3893 *
3894 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3895 * _and_ sched:sched_switch to the 'A' cgroup, while:
3896 *
3897 * trace -e sched:*switch -G A
3898 *
3899 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3900 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3901 * a cgroup (on the root cgroup, sys wide, etc).
3902 *
3903 * Multiple cgroups:
3904 *
3905 * trace -G A -e sched:*switch -G B
3906 *
3907 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3908 * to the 'B' cgroup.
3909 *
3910 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3911 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3912 */
3913 if (trace->cgroup)
3914 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3915
3916 err = evlist__create_maps(evlist, &trace->opts.target);
3917 if (err < 0) {
3918 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3919 goto out_delete_evlist;
3920 }
3921
3922 err = trace__symbols_init(trace, evlist);
3923 if (err < 0) {
3924 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3925 goto out_delete_evlist;
3926 }
3927
3928 evlist__config(evlist, &trace->opts, &callchain_param);
3929
3930 if (forks) {
3931 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
3932 if (err < 0) {
3933 fprintf(trace->output, "Couldn't run the workload!\n");
3934 goto out_delete_evlist;
3935 }
3936 workload_pid = evlist->workload.pid;
3937 }
3938
3939 err = evlist__open(evlist);
3940 if (err < 0)
3941 goto out_error_open;
3942
3943 err = bpf__apply_obj_config();
3944 if (err) {
3945 char errbuf[BUFSIZ];
3946
3947 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3948 pr_err("ERROR: Apply config to BPF failed: %s\n",
3949 errbuf);
3950 goto out_error_open;
3951 }
3952
3953 err = trace__set_filter_pids(trace);
3954 if (err < 0)
3955 goto out_error_mem;
3956
3957 if (trace->syscalls.prog_array.sys_enter)
3958 trace__init_syscalls_bpf_prog_array_maps(trace);
3959
3960 if (trace->ev_qualifier_ids.nr > 0) {
3961 err = trace__set_ev_qualifier_filter(trace);
3962 if (err < 0)
3963 goto out_errno;
3964
3965 if (trace->syscalls.events.sys_exit) {
3966 pr_debug("event qualifier tracepoint filter: %s\n",
3967 trace->syscalls.events.sys_exit->filter);
3968 }
3969 }
3970
3971 /*
3972 * If the "close" syscall is not traced, then we will not have the
3973 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3974 * fd->pathname table and were ending up showing the last value set by
3975 * syscalls opening a pathname and associating it with a descriptor or
3976 * reading it from /proc/pid/fd/ in cases where that doesn't make
3977 * sense.
3978 *
3979 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3980 * not in use.
3981 */
3982 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3983
3984 err = trace__expand_filters(trace, &evsel);
3985 if (err)
3986 goto out_delete_evlist;
3987 err = evlist__apply_filters(evlist, &evsel);
3988 if (err < 0)
3989 goto out_error_apply_filters;
3990
3991 if (trace->dump.map)
3992 bpf_map__fprintf(trace->dump.map, trace->output);
3993
3994 err = evlist__mmap(evlist, trace->opts.mmap_pages);
3995 if (err < 0)
3996 goto out_error_mmap;
3997
3998 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3999 evlist__enable(evlist);
4000
4001 if (forks)
4002 evlist__start_workload(evlist);
4003
4004 if (trace->opts.initial_delay) {
4005 usleep(trace->opts.initial_delay * 1000);
4006 evlist__enable(evlist);
4007 }
4008
4009 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4010 perf_thread_map__nr(evlist->core.threads) > 1 ||
4011 evlist__first(evlist)->core.attr.inherit;
4012
4013 /*
4014 * Now that we already used evsel->core.attr to ask the kernel to setup the
4015 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4016 * trace__resolve_callchain(), allowing per-event max-stack settings
4017 * to override an explicitly set --max-stack global setting.
4018 */
4019 evlist__for_each_entry(evlist, evsel) {
4020 if (evsel__has_callchain(evsel) &&
4021 evsel->core.attr.sample_max_stack == 0)
4022 evsel->core.attr.sample_max_stack = trace->max_stack;
4023 }
4024again:
4025 before = trace->nr_events;
4026
4027 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4028 union perf_event *event;
4029 struct mmap *md;
4030
4031 md = &evlist->mmap[i];
4032 if (perf_mmap__read_init(&md->core) < 0)
4033 continue;
4034
4035 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4036 ++trace->nr_events;
4037
4038 err = trace__deliver_event(trace, event);
4039 if (err)
4040 goto out_disable;
4041
4042 perf_mmap__consume(&md->core);
4043
4044 if (interrupted)
4045 goto out_disable;
4046
4047 if (done && !draining) {
4048 evlist__disable(evlist);
4049 draining = true;
4050 }
4051 }
4052 perf_mmap__read_done(&md->core);
4053 }
4054
4055 if (trace->nr_events == before) {
4056 int timeout = done ? 100 : -1;
4057
4058 if (!draining && evlist__poll(evlist, timeout) > 0) {
4059 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4060 draining = true;
4061
4062 goto again;
4063 } else {
4064 if (trace__flush_events(trace))
4065 goto out_disable;
4066 }
4067 } else {
4068 goto again;
4069 }
4070
4071out_disable:
4072 thread__zput(trace->current);
4073
4074 evlist__disable(evlist);
4075
4076 if (trace->sort_events)
4077 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4078
4079 if (!err) {
4080 if (trace->summary)
4081 trace__fprintf_thread_summary(trace, trace->output);
4082
4083 if (trace->show_tool_stats) {
4084 fprintf(trace->output, "Stats:\n "
4085 " vfs_getname : %" PRIu64 "\n"
4086 " proc_getname: %" PRIu64 "\n",
4087 trace->stats.vfs_getname,
4088 trace->stats.proc_getname);
4089 }
4090 }
4091
4092out_delete_evlist:
4093 trace__symbols__exit(trace);
4094 evlist__free_syscall_tp_fields(evlist);
4095 evlist__delete(evlist);
4096 cgroup__put(trace->cgroup);
4097 trace->evlist = NULL;
4098 trace->live = false;
4099 return err;
4100{
4101 char errbuf[BUFSIZ];
4102
4103out_error_sched_stat_runtime:
4104 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4105 goto out_error;
4106
4107out_error_raw_syscalls:
4108 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4109 goto out_error;
4110
4111out_error_mmap:
4112 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4113 goto out_error;
4114
4115out_error_open:
4116 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4117
4118out_error:
4119 fprintf(trace->output, "%s\n", errbuf);
4120 goto out_delete_evlist;
4121
4122out_error_apply_filters:
4123 fprintf(trace->output,
4124 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4125 evsel->filter, evsel__name(evsel), errno,
4126 str_error_r(errno, errbuf, sizeof(errbuf)));
4127 goto out_delete_evlist;
4128}
4129out_error_mem:
4130 fprintf(trace->output, "Not enough memory to run!\n");
4131 goto out_delete_evlist;
4132
4133out_errno:
4134 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4135 goto out_delete_evlist;
4136}
4137
4138static int trace__replay(struct trace *trace)
4139{
4140 const struct evsel_str_handler handlers[] = {
4141 { "probe:vfs_getname", trace__vfs_getname, },
4142 };
4143 struct perf_data data = {
4144 .path = input_name,
4145 .mode = PERF_DATA_MODE_READ,
4146 .force = trace->force,
4147 };
4148 struct perf_session *session;
4149 struct evsel *evsel;
4150 int err = -1;
4151
4152 trace->tool.sample = trace__process_sample;
4153 trace->tool.mmap = perf_event__process_mmap;
4154 trace->tool.mmap2 = perf_event__process_mmap2;
4155 trace->tool.comm = perf_event__process_comm;
4156 trace->tool.exit = perf_event__process_exit;
4157 trace->tool.fork = perf_event__process_fork;
4158 trace->tool.attr = perf_event__process_attr;
4159 trace->tool.tracing_data = perf_event__process_tracing_data;
4160 trace->tool.build_id = perf_event__process_build_id;
4161 trace->tool.namespaces = perf_event__process_namespaces;
4162
4163 trace->tool.ordered_events = true;
4164 trace->tool.ordering_requires_timestamps = true;
4165
4166 /* add tid to output */
4167 trace->multiple_threads = true;
4168
4169 session = perf_session__new(&data, &trace->tool);
4170 if (IS_ERR(session))
4171 return PTR_ERR(session);
4172
4173 if (trace->opts.target.pid)
4174 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4175
4176 if (trace->opts.target.tid)
4177 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4178
4179 if (symbol__init(&session->header.env) < 0)
4180 goto out;
4181
4182 trace->host = &session->machines.host;
4183
4184 err = perf_session__set_tracepoints_handlers(session, handlers);
4185 if (err)
4186 goto out;
4187
4188 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter");
4189 trace->syscalls.events.sys_enter = evsel;
4190 /* older kernels have syscalls tp versus raw_syscalls */
4191 if (evsel == NULL)
4192 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter");
4193
4194 if (evsel &&
4195 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4196 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4197 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4198 goto out;
4199 }
4200
4201 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit");
4202 trace->syscalls.events.sys_exit = evsel;
4203 if (evsel == NULL)
4204 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit");
4205 if (evsel &&
4206 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4207 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4208 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4209 goto out;
4210 }
4211
4212 evlist__for_each_entry(session->evlist, evsel) {
4213 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4214 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4215 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4216 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4217 evsel->handler = trace__pgfault;
4218 }
4219
4220 setup_pager();
4221
4222 err = perf_session__process_events(session);
4223 if (err)
4224 pr_err("Failed to process events, error %d", err);
4225
4226 else if (trace->summary)
4227 trace__fprintf_thread_summary(trace, trace->output);
4228
4229out:
4230 perf_session__delete(session);
4231
4232 return err;
4233}
4234
4235static size_t trace__fprintf_threads_header(FILE *fp)
4236{
4237 size_t printed;
4238
4239 printed = fprintf(fp, "\n Summary of events:\n\n");
4240
4241 return printed;
4242}
4243
4244DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4245 struct syscall_stats *stats;
4246 double msecs;
4247 int syscall;
4248)
4249{
4250 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4251 struct syscall_stats *stats = source->priv;
4252
4253 entry->syscall = source->i;
4254 entry->stats = stats;
4255 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4256}
4257
4258static size_t thread__dump_stats(struct thread_trace *ttrace,
4259 struct trace *trace, FILE *fp)
4260{
4261 size_t printed = 0;
4262 struct syscall *sc;
4263 struct rb_node *nd;
4264 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4265
4266 if (syscall_stats == NULL)
4267 return 0;
4268
4269 printed += fprintf(fp, "\n");
4270
4271 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4272 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4273 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4274
4275 resort_rb__for_each_entry(nd, syscall_stats) {
4276 struct syscall_stats *stats = syscall_stats_entry->stats;
4277 if (stats) {
4278 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4279 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4280 double avg = avg_stats(&stats->stats);
4281 double pct;
4282 u64 n = (u64)stats->stats.n;
4283
4284 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4285 avg /= NSEC_PER_MSEC;
4286
4287 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4288 printed += fprintf(fp, " %-15s", sc->name);
4289 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4290 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4291 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4292
4293 if (trace->errno_summary && stats->nr_failures) {
4294 const char *arch_name = perf_env__arch(trace->host->env);
4295 int e;
4296
4297 for (e = 0; e < stats->max_errno; ++e) {
4298 if (stats->errnos[e] != 0)
4299 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4300 }
4301 }
4302 }
4303 }
4304
4305 resort_rb__delete(syscall_stats);
4306 printed += fprintf(fp, "\n\n");
4307
4308 return printed;
4309}
4310
4311static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4312{
4313 size_t printed = 0;
4314 struct thread_trace *ttrace = thread__priv(thread);
4315 double ratio;
4316
4317 if (ttrace == NULL)
4318 return 0;
4319
4320 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4321
4322 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4323 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4324 printed += fprintf(fp, "%.1f%%", ratio);
4325 if (ttrace->pfmaj)
4326 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4327 if (ttrace->pfmin)
4328 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4329 if (trace->sched)
4330 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4331 else if (fputc('\n', fp) != EOF)
4332 ++printed;
4333
4334 printed += thread__dump_stats(ttrace, trace, fp);
4335
4336 return printed;
4337}
4338
4339static unsigned long thread__nr_events(struct thread_trace *ttrace)
4340{
4341 return ttrace ? ttrace->nr_events : 0;
4342}
4343
4344DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4345 struct thread *thread;
4346)
4347{
4348 entry->thread = rb_entry(nd, struct thread, rb_node);
4349}
4350
4351static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4352{
4353 size_t printed = trace__fprintf_threads_header(fp);
4354 struct rb_node *nd;
4355 int i;
4356
4357 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4358 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4359
4360 if (threads == NULL) {
4361 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4362 return 0;
4363 }
4364
4365 resort_rb__for_each_entry(nd, threads)
4366 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4367
4368 resort_rb__delete(threads);
4369 }
4370 return printed;
4371}
4372
4373static int trace__set_duration(const struct option *opt, const char *str,
4374 int unset __maybe_unused)
4375{
4376 struct trace *trace = opt->value;
4377
4378 trace->duration_filter = atof(str);
4379 return 0;
4380}
4381
4382static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4383 int unset __maybe_unused)
4384{
4385 int ret = -1;
4386 size_t i;
4387 struct trace *trace = opt->value;
4388 /*
4389 * FIXME: introduce a intarray class, plain parse csv and create a
4390 * { int nr, int entries[] } struct...
4391 */
4392 struct intlist *list = intlist__new(str);
4393
4394 if (list == NULL)
4395 return -1;
4396
4397 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4398 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4399
4400 if (trace->filter_pids.entries == NULL)
4401 goto out;
4402
4403 trace->filter_pids.entries[0] = getpid();
4404
4405 for (i = 1; i < trace->filter_pids.nr; ++i)
4406 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4407
4408 intlist__delete(list);
4409 ret = 0;
4410out:
4411 return ret;
4412}
4413
4414static int trace__open_output(struct trace *trace, const char *filename)
4415{
4416 struct stat st;
4417
4418 if (!stat(filename, &st) && st.st_size) {
4419 char oldname[PATH_MAX];
4420
4421 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4422 unlink(oldname);
4423 rename(filename, oldname);
4424 }
4425
4426 trace->output = fopen(filename, "w");
4427
4428 return trace->output == NULL ? -errno : 0;
4429}
4430
4431static int parse_pagefaults(const struct option *opt, const char *str,
4432 int unset __maybe_unused)
4433{
4434 int *trace_pgfaults = opt->value;
4435
4436 if (strcmp(str, "all") == 0)
4437 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4438 else if (strcmp(str, "maj") == 0)
4439 *trace_pgfaults |= TRACE_PFMAJ;
4440 else if (strcmp(str, "min") == 0)
4441 *trace_pgfaults |= TRACE_PFMIN;
4442 else
4443 return -1;
4444
4445 return 0;
4446}
4447
4448static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4449{
4450 struct evsel *evsel;
4451
4452 evlist__for_each_entry(evlist, evsel) {
4453 if (evsel->handler == NULL)
4454 evsel->handler = handler;
4455 }
4456}
4457
4458static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4459{
4460 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4461
4462 if (fmt) {
4463 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4464
4465 if (scfmt) {
4466 int skip = 0;
4467
4468 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4469 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4470 ++skip;
4471
4472 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4473 }
4474 }
4475}
4476
4477static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4478{
4479 struct evsel *evsel;
4480
4481 evlist__for_each_entry(evlist, evsel) {
4482 if (evsel->priv || !evsel->tp_format)
4483 continue;
4484
4485 if (strcmp(evsel->tp_format->system, "syscalls")) {
4486 evsel__init_tp_arg_scnprintf(evsel);
4487 continue;
4488 }
4489
4490 if (evsel__init_syscall_tp(evsel))
4491 return -1;
4492
4493 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4494 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4495
4496 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4497 return -1;
4498
4499 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4500 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4501 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4502
4503 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4504 return -1;
4505
4506 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4507 }
4508 }
4509
4510 return 0;
4511}
4512
4513/*
4514 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4515 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4516 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4517 *
4518 * It'd be better to introduce a parse_options() variant that would return a
4519 * list with the terms it didn't match to an event...
4520 */
4521static int trace__parse_events_option(const struct option *opt, const char *str,
4522 int unset __maybe_unused)
4523{
4524 struct trace *trace = (struct trace *)opt->value;
4525 const char *s = str;
4526 char *sep = NULL, *lists[2] = { NULL, NULL, };
4527 int len = strlen(str) + 1, err = -1, list, idx;
4528 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4529 char group_name[PATH_MAX];
4530 struct syscall_fmt *fmt;
4531
4532 if (strace_groups_dir == NULL)
4533 return -1;
4534
4535 if (*s == '!') {
4536 ++s;
4537 trace->not_ev_qualifier = true;
4538 }
4539
4540 while (1) {
4541 if ((sep = strchr(s, ',')) != NULL)
4542 *sep = '\0';
4543
4544 list = 0;
4545 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4546 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4547 list = 1;
4548 goto do_concat;
4549 }
4550
4551 fmt = syscall_fmt__find_by_alias(s);
4552 if (fmt != NULL) {
4553 list = 1;
4554 s = fmt->name;
4555 } else {
4556 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4557 if (access(group_name, R_OK) == 0)
4558 list = 1;
4559 }
4560do_concat:
4561 if (lists[list]) {
4562 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4563 } else {
4564 lists[list] = malloc(len);
4565 if (lists[list] == NULL)
4566 goto out;
4567 strcpy(lists[list], s);
4568 }
4569
4570 if (!sep)
4571 break;
4572
4573 *sep = ',';
4574 s = sep + 1;
4575 }
4576
4577 if (lists[1] != NULL) {
4578 struct strlist_config slist_config = {
4579 .dirname = strace_groups_dir,
4580 };
4581
4582 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4583 if (trace->ev_qualifier == NULL) {
4584 fputs("Not enough memory to parse event qualifier", trace->output);
4585 goto out;
4586 }
4587
4588 if (trace__validate_ev_qualifier(trace))
4589 goto out;
4590 trace->trace_syscalls = true;
4591 }
4592
4593 err = 0;
4594
4595 if (lists[0]) {
4596 struct option o = {
4597 .value = &trace->evlist,
4598 };
4599 err = parse_events_option(&o, lists[0], 0);
4600 }
4601out:
4602 free(strace_groups_dir);
4603 free(lists[0]);
4604 free(lists[1]);
4605 if (sep)
4606 *sep = ',';
4607
4608 return err;
4609}
4610
4611static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4612{
4613 struct trace *trace = opt->value;
4614
4615 if (!list_empty(&trace->evlist->core.entries)) {
4616 struct option o = {
4617 .value = &trace->evlist,
4618 };
4619 return parse_cgroups(&o, str, unset);
4620 }
4621 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4622
4623 return 0;
4624}
4625
4626static int trace__config(const char *var, const char *value, void *arg)
4627{
4628 struct trace *trace = arg;
4629 int err = 0;
4630
4631 if (!strcmp(var, "trace.add_events")) {
4632 trace->perfconfig_events = strdup(value);
4633 if (trace->perfconfig_events == NULL) {
4634 pr_err("Not enough memory for %s\n", "trace.add_events");
4635 return -1;
4636 }
4637 } else if (!strcmp(var, "trace.show_timestamp")) {
4638 trace->show_tstamp = perf_config_bool(var, value);
4639 } else if (!strcmp(var, "trace.show_duration")) {
4640 trace->show_duration = perf_config_bool(var, value);
4641 } else if (!strcmp(var, "trace.show_arg_names")) {
4642 trace->show_arg_names = perf_config_bool(var, value);
4643 if (!trace->show_arg_names)
4644 trace->show_zeros = true;
4645 } else if (!strcmp(var, "trace.show_zeros")) {
4646 bool new_show_zeros = perf_config_bool(var, value);
4647 if (!trace->show_arg_names && !new_show_zeros) {
4648 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4649 goto out;
4650 }
4651 trace->show_zeros = new_show_zeros;
4652 } else if (!strcmp(var, "trace.show_prefix")) {
4653 trace->show_string_prefix = perf_config_bool(var, value);
4654 } else if (!strcmp(var, "trace.no_inherit")) {
4655 trace->opts.no_inherit = perf_config_bool(var, value);
4656 } else if (!strcmp(var, "trace.args_alignment")) {
4657 int args_alignment = 0;
4658 if (perf_config_int(&args_alignment, var, value) == 0)
4659 trace->args_alignment = args_alignment;
4660 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4661 if (strcasecmp(value, "libtraceevent") == 0)
4662 trace->libtraceevent_print = true;
4663 else if (strcasecmp(value, "libbeauty") == 0)
4664 trace->libtraceevent_print = false;
4665 }
4666out:
4667 return err;
4668}
4669
4670static void trace__exit(struct trace *trace)
4671{
4672 int i;
4673
4674 strlist__delete(trace->ev_qualifier);
4675 free(trace->ev_qualifier_ids.entries);
4676 if (trace->syscalls.table) {
4677 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
4678 syscall__exit(&trace->syscalls.table[i]);
4679 free(trace->syscalls.table);
4680 }
4681 syscalltbl__delete(trace->sctbl);
4682 zfree(&trace->perfconfig_events);
4683}
4684
4685int cmd_trace(int argc, const char **argv)
4686{
4687 const char *trace_usage[] = {
4688 "perf trace [<options>] [<command>]",
4689 "perf trace [<options>] -- <command> [<options>]",
4690 "perf trace record [<options>] [<command>]",
4691 "perf trace record [<options>] -- <command> [<options>]",
4692 NULL
4693 };
4694 struct trace trace = {
4695 .opts = {
4696 .target = {
4697 .uid = UINT_MAX,
4698 .uses_mmap = true,
4699 },
4700 .user_freq = UINT_MAX,
4701 .user_interval = ULLONG_MAX,
4702 .no_buffering = true,
4703 .mmap_pages = UINT_MAX,
4704 },
4705 .output = stderr,
4706 .show_comm = true,
4707 .show_tstamp = true,
4708 .show_duration = true,
4709 .show_arg_names = true,
4710 .args_alignment = 70,
4711 .trace_syscalls = false,
4712 .kernel_syscallchains = false,
4713 .max_stack = UINT_MAX,
4714 .max_events = ULONG_MAX,
4715 };
4716 const char *map_dump_str = NULL;
4717 const char *output_name = NULL;
4718 const struct option trace_options[] = {
4719 OPT_CALLBACK('e', "event", &trace, "event",
4720 "event/syscall selector. use 'perf list' to list available events",
4721 trace__parse_events_option),
4722 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4723 "event filter", parse_filter),
4724 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4725 "show the thread COMM next to its id"),
4726 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4727 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4728 trace__parse_events_option),
4729 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4730 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4731 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4732 "trace events on existing process id"),
4733 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4734 "trace events on existing thread id"),
4735 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4736 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4737 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4738 "system-wide collection from all CPUs"),
4739 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4740 "list of cpus to monitor"),
4741 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4742 "child tasks do not inherit counters"),
4743 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4744 "number of mmap data pages", evlist__parse_mmap_pages),
4745 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4746 "user to profile"),
4747 OPT_CALLBACK(0, "duration", &trace, "float",
4748 "show only events with duration > N.M ms",
4749 trace__set_duration),
4750#ifdef HAVE_LIBBPF_SUPPORT
4751 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4752#endif
4753 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4754 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4755 OPT_BOOLEAN('T', "time", &trace.full_time,
4756 "Show full timestamp, not time relative to first start"),
4757 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4758 "Show only syscalls that failed"),
4759 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4760 "Show only syscall summary with statistics"),
4761 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4762 "Show all syscalls and summary with statistics"),
4763 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4764 "Show errno stats per syscall, use with -s or -S"),
4765 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4766 "Trace pagefaults", parse_pagefaults, "maj"),
4767 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4768 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4769 OPT_CALLBACK(0, "call-graph", &trace.opts,
4770 "record_mode[,record_size]", record_callchain_help,
4771 &record_parse_callchain_opt),
4772 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4773 "Use libtraceevent to print the tracepoint arguments."),
4774 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4775 "Show the kernel callchains on the syscall exit path"),
4776 OPT_ULONG(0, "max-events", &trace.max_events,
4777 "Set the maximum number of events to print, exit after that is reached. "),
4778 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4779 "Set the minimum stack depth when parsing the callchain, "
4780 "anything below the specified depth will be ignored."),
4781 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4782 "Set the maximum stack depth when parsing the callchain, "
4783 "anything beyond the specified depth will be ignored. "
4784 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4785 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4786 "Sort batch of events before processing, use if getting out of order events"),
4787 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4788 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4789 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4790 "per thread proc mmap processing timeout in ms"),
4791 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4792 trace__parse_cgroups),
4793 OPT_INTEGER('D', "delay", &trace.opts.initial_delay,
4794 "ms to wait before starting measurement after program "
4795 "start"),
4796 OPTS_EVSWITCH(&trace.evswitch),
4797 OPT_END()
4798 };
4799 bool __maybe_unused max_stack_user_set = true;
4800 bool mmap_pages_user_set = true;
4801 struct evsel *evsel;
4802 const char * const trace_subcommands[] = { "record", NULL };
4803 int err = -1;
4804 char bf[BUFSIZ];
4805 struct sigaction sigchld_act;
4806
4807 signal(SIGSEGV, sighandler_dump_stack);
4808 signal(SIGFPE, sighandler_dump_stack);
4809 signal(SIGINT, sighandler_interrupt);
4810
4811 memset(&sigchld_act, 0, sizeof(sigchld_act));
4812 sigchld_act.sa_flags = SA_SIGINFO;
4813 sigchld_act.sa_sigaction = sighandler_chld;
4814 sigaction(SIGCHLD, &sigchld_act, NULL);
4815
4816 trace.evlist = evlist__new();
4817 trace.sctbl = syscalltbl__new();
4818
4819 if (trace.evlist == NULL || trace.sctbl == NULL) {
4820 pr_err("Not enough memory to run!\n");
4821 err = -ENOMEM;
4822 goto out;
4823 }
4824
4825 /*
4826 * Parsing .perfconfig may entail creating a BPF event, that may need
4827 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4828 * is too small. This affects just this process, not touching the
4829 * global setting. If it fails we'll get something in 'perf trace -v'
4830 * to help diagnose the problem.
4831 */
4832 rlimit__bump_memlock();
4833
4834 err = perf_config(trace__config, &trace);
4835 if (err)
4836 goto out;
4837
4838 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4839 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4840
4841 /*
4842 * Here we already passed thru trace__parse_events_option() and it has
4843 * already figured out if -e syscall_name, if not but if --event
4844 * foo:bar was used, the user is interested _just_ in those, say,
4845 * tracepoint events, not in the strace-like syscall-name-based mode.
4846 *
4847 * This is important because we need to check if strace-like mode is
4848 * needed to decided if we should filter out the eBPF
4849 * __augmented_syscalls__ code, if it is in the mix, say, via
4850 * .perfconfig trace.add_events, and filter those out.
4851 */
4852 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4853 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4854 trace.trace_syscalls = true;
4855 }
4856 /*
4857 * Now that we have --verbose figured out, lets see if we need to parse
4858 * events from .perfconfig, so that if those events fail parsing, say some
4859 * BPF program fails, then we'll be able to use --verbose to see what went
4860 * wrong in more detail.
4861 */
4862 if (trace.perfconfig_events != NULL) {
4863 struct parse_events_error parse_err;
4864
4865 parse_events_error__init(&parse_err);
4866 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4867 if (err)
4868 parse_events_error__print(&parse_err, trace.perfconfig_events);
4869 parse_events_error__exit(&parse_err);
4870 if (err)
4871 goto out;
4872 }
4873
4874 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4875 usage_with_options_msg(trace_usage, trace_options,
4876 "cgroup monitoring only available in system-wide mode");
4877 }
4878
4879 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4880 if (IS_ERR(evsel)) {
4881 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4882 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4883 goto out;
4884 }
4885
4886 if (evsel) {
4887 trace.syscalls.events.augmented = evsel;
4888
4889 evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4890 if (evsel == NULL) {
4891 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4892 goto out;
4893 }
4894
4895 if (evsel->bpf_obj == NULL) {
4896 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4897 goto out;
4898 }
4899
4900 trace.bpf_obj = evsel->bpf_obj;
4901
4902 /*
4903 * If we have _just_ the augmenter event but don't have a
4904 * explicit --syscalls, then assume we want all strace-like
4905 * syscalls:
4906 */
4907 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4908 trace.trace_syscalls = true;
4909 /*
4910 * So, if we have a syscall augmenter, but trace_syscalls, aka
4911 * strace-like syscall tracing is not set, then we need to trow
4912 * away the augmenter, i.e. all the events that were created
4913 * from that BPF object file.
4914 *
4915 * This is more to fix the current .perfconfig trace.add_events
4916 * style of setting up the strace-like eBPF based syscall point
4917 * payload augmenter.
4918 *
4919 * All this complexity will be avoided by adding an alternative
4920 * to trace.add_events in the form of
4921 * trace.bpf_augmented_syscalls, that will be only parsed if we
4922 * need it.
4923 *
4924 * .perfconfig trace.add_events is still useful if we want, for
4925 * instance, have msr_write.msr in some .perfconfig profile based
4926 * 'perf trace --config determinism.profile' mode, where for some
4927 * particular goal/workload type we want a set of events and
4928 * output mode (with timings, etc) instead of having to add
4929 * all via the command line.
4930 *
4931 * Also --config to specify an alternate .perfconfig file needs
4932 * to be implemented.
4933 */
4934 if (!trace.trace_syscalls) {
4935 trace__delete_augmented_syscalls(&trace);
4936 } else {
4937 trace__set_bpf_map_filtered_pids(&trace);
4938 trace__set_bpf_map_syscalls(&trace);
4939 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4940 }
4941 }
4942
4943 err = bpf__setup_stdout(trace.evlist);
4944 if (err) {
4945 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4946 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4947 goto out;
4948 }
4949
4950 err = -1;
4951
4952 if (map_dump_str) {
4953 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4954 if (trace.dump.map == NULL) {
4955 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4956 goto out;
4957 }
4958 }
4959
4960 if (trace.trace_pgfaults) {
4961 trace.opts.sample_address = true;
4962 trace.opts.sample_time = true;
4963 }
4964
4965 if (trace.opts.mmap_pages == UINT_MAX)
4966 mmap_pages_user_set = false;
4967
4968 if (trace.max_stack == UINT_MAX) {
4969 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4970 max_stack_user_set = false;
4971 }
4972
4973#ifdef HAVE_DWARF_UNWIND_SUPPORT
4974 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4975 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4976 }
4977#endif
4978
4979 if (callchain_param.enabled) {
4980 if (!mmap_pages_user_set && geteuid() == 0)
4981 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4982
4983 symbol_conf.use_callchain = true;
4984 }
4985
4986 if (trace.evlist->core.nr_entries > 0) {
4987 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
4988 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4989 perror("failed to set syscalls:* tracepoint fields");
4990 goto out;
4991 }
4992 }
4993
4994 if (trace.sort_events) {
4995 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4996 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4997 }
4998
4999 /*
5000 * If we are augmenting syscalls, then combine what we put in the
5001 * __augmented_syscalls__ BPF map with what is in the
5002 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
5003 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
5004 *
5005 * We'll switch to look at two BPF maps, one for sys_enter and the
5006 * other for sys_exit when we start augmenting the sys_exit paths with
5007 * buffers that are being copied from kernel to userspace, think 'read'
5008 * syscall.
5009 */
5010 if (trace.syscalls.events.augmented) {
5011 evlist__for_each_entry(trace.evlist, evsel) {
5012 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
5013
5014 if (raw_syscalls_sys_exit) {
5015 trace.raw_augmented_syscalls = true;
5016 goto init_augmented_syscall_tp;
5017 }
5018
5019 if (trace.syscalls.events.augmented->priv == NULL &&
5020 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5021 struct evsel *augmented = trace.syscalls.events.augmented;
5022 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5023 evsel__init_augmented_syscall_tp_args(augmented))
5024 goto out;
5025 /*
5026 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5027 * Above we made sure we can get from the payload the tp fields
5028 * that we get from syscalls:sys_enter tracefs format file.
5029 */
5030 augmented->handler = trace__sys_enter;
5031 /*
5032 * Now we do the same for the *syscalls:sys_enter event so that
5033 * if we handle it directly, i.e. if the BPF prog returns 0 so
5034 * as not to filter it, then we'll handle it just like we would
5035 * for the BPF_OUTPUT one:
5036 */
5037 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5038 evsel__init_augmented_syscall_tp_args(evsel))
5039 goto out;
5040 evsel->handler = trace__sys_enter;
5041 }
5042
5043 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5044 struct syscall_tp *sc;
5045init_augmented_syscall_tp:
5046 if (evsel__init_augmented_syscall_tp(evsel, evsel))
5047 goto out;
5048 sc = __evsel__syscall_tp(evsel);
5049 /*
5050 * For now with BPF raw_augmented we hook into
5051 * raw_syscalls:sys_enter and there we get all
5052 * 6 syscall args plus the tracepoint common
5053 * fields and the syscall_nr (another long).
5054 * So we check if that is the case and if so
5055 * don't look after the sc->args_size but
5056 * always after the full raw_syscalls:sys_enter
5057 * payload, which is fixed.
5058 *
5059 * We'll revisit this later to pass
5060 * s->args_size to the BPF augmenter (now
5061 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5062 * so that it copies only what we need for each
5063 * syscall, like what happens when we use
5064 * syscalls:sys_enter_NAME, so that we reduce
5065 * the kernel/userspace traffic to just what is
5066 * needed for each syscall.
5067 */
5068 if (trace.raw_augmented_syscalls)
5069 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5070 evsel__init_augmented_syscall_tp_ret(evsel);
5071 evsel->handler = trace__sys_exit;
5072 }
5073 }
5074 }
5075
5076 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5077 return trace__record(&trace, argc-1, &argv[1]);
5078
5079 /* Using just --errno-summary will trigger --summary */
5080 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5081 trace.summary_only = true;
5082
5083 /* summary_only implies summary option, but don't overwrite summary if set */
5084 if (trace.summary_only)
5085 trace.summary = trace.summary_only;
5086
5087 if (output_name != NULL) {
5088 err = trace__open_output(&trace, output_name);
5089 if (err < 0) {
5090 perror("failed to create output file");
5091 goto out;
5092 }
5093 }
5094
5095 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5096 if (err)
5097 goto out_close;
5098
5099 err = target__validate(&trace.opts.target);
5100 if (err) {
5101 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5102 fprintf(trace.output, "%s", bf);
5103 goto out_close;
5104 }
5105
5106 err = target__parse_uid(&trace.opts.target);
5107 if (err) {
5108 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5109 fprintf(trace.output, "%s", bf);
5110 goto out_close;
5111 }
5112
5113 if (!argc && target__none(&trace.opts.target))
5114 trace.opts.target.system_wide = true;
5115
5116 if (input_name)
5117 err = trace__replay(&trace);
5118 else
5119 err = trace__run(&trace, argc, argv);
5120
5121out_close:
5122 if (output_name != NULL)
5123 fclose(trace.output);
5124out:
5125 trace__exit(&trace);
5126 return err;
5127}
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 * Released under the GPL v2. (and only v2, not any later version)
17 */
18
19#include <traceevent/event-parse.h>
20#include <api/fs/tracing_path.h>
21#include "builtin.h"
22#include "util/cgroup.h"
23#include "util/color.h"
24#include "util/debug.h"
25#include "util/env.h"
26#include "util/event.h"
27#include "util/evlist.h"
28#include <subcmd/exec-cmd.h>
29#include "util/machine.h"
30#include "util/path.h"
31#include "util/session.h"
32#include "util/thread.h"
33#include <subcmd/parse-options.h>
34#include "util/strlist.h"
35#include "util/intlist.h"
36#include "util/thread_map.h"
37#include "util/stat.h"
38#include "trace/beauty/beauty.h"
39#include "trace-event.h"
40#include "util/parse-events.h"
41#include "util/bpf-loader.h"
42#include "callchain.h"
43#include "print_binary.h"
44#include "string2.h"
45#include "syscalltbl.h"
46#include "rb_resort.h"
47
48#include <errno.h>
49#include <inttypes.h>
50#include <poll.h>
51#include <signal.h>
52#include <stdlib.h>
53#include <string.h>
54#include <linux/err.h>
55#include <linux/filter.h>
56#include <linux/kernel.h>
57#include <linux/random.h>
58#include <linux/stringify.h>
59#include <linux/time64.h>
60#include <fcntl.h>
61
62#include "sane_ctype.h"
63
64#ifndef O_CLOEXEC
65# define O_CLOEXEC 02000000
66#endif
67
68#ifndef F_LINUX_SPECIFIC_BASE
69# define F_LINUX_SPECIFIC_BASE 1024
70#endif
71
72struct trace {
73 struct perf_tool tool;
74 struct syscalltbl *sctbl;
75 struct {
76 int max;
77 struct syscall *table;
78 struct {
79 struct perf_evsel *sys_enter,
80 *sys_exit;
81 } events;
82 } syscalls;
83 struct record_opts opts;
84 struct perf_evlist *evlist;
85 struct machine *host;
86 struct thread *current;
87 struct cgroup *cgroup;
88 u64 base_time;
89 FILE *output;
90 unsigned long nr_events;
91 struct strlist *ev_qualifier;
92 struct {
93 size_t nr;
94 int *entries;
95 } ev_qualifier_ids;
96 struct {
97 size_t nr;
98 pid_t *entries;
99 } filter_pids;
100 double duration_filter;
101 double runtime_ms;
102 struct {
103 u64 vfs_getname,
104 proc_getname;
105 } stats;
106 unsigned int max_stack;
107 unsigned int min_stack;
108 bool not_ev_qualifier;
109 bool live;
110 bool full_time;
111 bool sched;
112 bool multiple_threads;
113 bool summary;
114 bool summary_only;
115 bool failure_only;
116 bool show_comm;
117 bool print_sample;
118 bool show_tool_stats;
119 bool trace_syscalls;
120 bool kernel_syscallchains;
121 bool force;
122 bool vfs_getname;
123 int trace_pgfaults;
124 int open_id;
125};
126
127struct tp_field {
128 int offset;
129 union {
130 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
131 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
132 };
133};
134
135#define TP_UINT_FIELD(bits) \
136static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
137{ \
138 u##bits value; \
139 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
140 return value; \
141}
142
143TP_UINT_FIELD(8);
144TP_UINT_FIELD(16);
145TP_UINT_FIELD(32);
146TP_UINT_FIELD(64);
147
148#define TP_UINT_FIELD__SWAPPED(bits) \
149static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
150{ \
151 u##bits value; \
152 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
153 return bswap_##bits(value);\
154}
155
156TP_UINT_FIELD__SWAPPED(16);
157TP_UINT_FIELD__SWAPPED(32);
158TP_UINT_FIELD__SWAPPED(64);
159
160static int tp_field__init_uint(struct tp_field *field,
161 struct format_field *format_field,
162 bool needs_swap)
163{
164 field->offset = format_field->offset;
165
166 switch (format_field->size) {
167 case 1:
168 field->integer = tp_field__u8;
169 break;
170 case 2:
171 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
172 break;
173 case 4:
174 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
175 break;
176 case 8:
177 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
178 break;
179 default:
180 return -1;
181 }
182
183 return 0;
184}
185
186static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
187{
188 return sample->raw_data + field->offset;
189}
190
191static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field)
192{
193 field->offset = format_field->offset;
194 field->pointer = tp_field__ptr;
195 return 0;
196}
197
198struct syscall_tp {
199 struct tp_field id;
200 union {
201 struct tp_field args, ret;
202 };
203};
204
205static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
206 struct tp_field *field,
207 const char *name)
208{
209 struct format_field *format_field = perf_evsel__field(evsel, name);
210
211 if (format_field == NULL)
212 return -1;
213
214 return tp_field__init_uint(field, format_field, evsel->needs_swap);
215}
216
217#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
218 ({ struct syscall_tp *sc = evsel->priv;\
219 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
220
221static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
222 struct tp_field *field,
223 const char *name)
224{
225 struct format_field *format_field = perf_evsel__field(evsel, name);
226
227 if (format_field == NULL)
228 return -1;
229
230 return tp_field__init_ptr(field, format_field);
231}
232
233#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
234 ({ struct syscall_tp *sc = evsel->priv;\
235 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
236
237static void perf_evsel__delete_priv(struct perf_evsel *evsel)
238{
239 zfree(&evsel->priv);
240 perf_evsel__delete(evsel);
241}
242
243static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel, void *handler)
244{
245 evsel->priv = malloc(sizeof(struct syscall_tp));
246 if (evsel->priv != NULL) {
247 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
248 goto out_delete;
249
250 evsel->handler = handler;
251 return 0;
252 }
253
254 return -ENOMEM;
255
256out_delete:
257 zfree(&evsel->priv);
258 return -ENOENT;
259}
260
261static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void *handler)
262{
263 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
264
265 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
266 if (IS_ERR(evsel))
267 evsel = perf_evsel__newtp("syscalls", direction);
268
269 if (IS_ERR(evsel))
270 return NULL;
271
272 if (perf_evsel__init_syscall_tp(evsel, handler))
273 goto out_delete;
274
275 return evsel;
276
277out_delete:
278 perf_evsel__delete_priv(evsel);
279 return NULL;
280}
281
282#define perf_evsel__sc_tp_uint(evsel, name, sample) \
283 ({ struct syscall_tp *fields = evsel->priv; \
284 fields->name.integer(&fields->name, sample); })
285
286#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
287 ({ struct syscall_tp *fields = evsel->priv; \
288 fields->name.pointer(&fields->name, sample); })
289
290size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, int val)
291{
292 int idx = val - sa->offset;
293
294 if (idx < 0 || idx >= sa->nr_entries)
295 return scnprintf(bf, size, intfmt, val);
296
297 return scnprintf(bf, size, "%s", sa->entries[idx]);
298}
299
300static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
301 const char *intfmt,
302 struct syscall_arg *arg)
303{
304 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->val);
305}
306
307static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
308 struct syscall_arg *arg)
309{
310 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
311}
312
313#define SCA_STRARRAY syscall_arg__scnprintf_strarray
314
315struct strarrays {
316 int nr_entries;
317 struct strarray **entries;
318};
319
320#define DEFINE_STRARRAYS(array) struct strarrays strarrays__##array = { \
321 .nr_entries = ARRAY_SIZE(array), \
322 .entries = array, \
323}
324
325size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
326 struct syscall_arg *arg)
327{
328 struct strarrays *sas = arg->parm;
329 int i;
330
331 for (i = 0; i < sas->nr_entries; ++i) {
332 struct strarray *sa = sas->entries[i];
333 int idx = arg->val - sa->offset;
334
335 if (idx >= 0 && idx < sa->nr_entries) {
336 if (sa->entries[idx] == NULL)
337 break;
338 return scnprintf(bf, size, "%s", sa->entries[idx]);
339 }
340 }
341
342 return scnprintf(bf, size, "%d", arg->val);
343}
344
345#ifndef AT_FDCWD
346#define AT_FDCWD -100
347#endif
348
349static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
350 struct syscall_arg *arg)
351{
352 int fd = arg->val;
353
354 if (fd == AT_FDCWD)
355 return scnprintf(bf, size, "CWD");
356
357 return syscall_arg__scnprintf_fd(bf, size, arg);
358}
359
360#define SCA_FDAT syscall_arg__scnprintf_fd_at
361
362static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
363 struct syscall_arg *arg);
364
365#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
366
367size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
368{
369 return scnprintf(bf, size, "%#lx", arg->val);
370}
371
372size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
373{
374 return scnprintf(bf, size, "%d", arg->val);
375}
376
377size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
378{
379 return scnprintf(bf, size, "%ld", arg->val);
380}
381
382static const char *bpf_cmd[] = {
383 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
384 "MAP_GET_NEXT_KEY", "PROG_LOAD",
385};
386static DEFINE_STRARRAY(bpf_cmd);
387
388static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
389static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
390
391static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
392static DEFINE_STRARRAY(itimers);
393
394static const char *keyctl_options[] = {
395 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
396 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
397 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
398 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
399 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
400};
401static DEFINE_STRARRAY(keyctl_options);
402
403static const char *whences[] = { "SET", "CUR", "END",
404#ifdef SEEK_DATA
405"DATA",
406#endif
407#ifdef SEEK_HOLE
408"HOLE",
409#endif
410};
411static DEFINE_STRARRAY(whences);
412
413static const char *fcntl_cmds[] = {
414 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
415 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
416 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
417 "GETOWNER_UIDS",
418};
419static DEFINE_STRARRAY(fcntl_cmds);
420
421static const char *fcntl_linux_specific_cmds[] = {
422 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
423 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
424 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
425};
426
427static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, F_LINUX_SPECIFIC_BASE);
428
429static struct strarray *fcntl_cmds_arrays[] = {
430 &strarray__fcntl_cmds,
431 &strarray__fcntl_linux_specific_cmds,
432};
433
434static DEFINE_STRARRAYS(fcntl_cmds_arrays);
435
436static const char *rlimit_resources[] = {
437 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
438 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
439 "RTTIME",
440};
441static DEFINE_STRARRAY(rlimit_resources);
442
443static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
444static DEFINE_STRARRAY(sighow);
445
446static const char *clockid[] = {
447 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
448 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
449 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
450};
451static DEFINE_STRARRAY(clockid);
452
453static const char *socket_families[] = {
454 "UNSPEC", "LOCAL", "INET", "AX25", "IPX", "APPLETALK", "NETROM",
455 "BRIDGE", "ATMPVC", "X25", "INET6", "ROSE", "DECnet", "NETBEUI",
456 "SECURITY", "KEY", "NETLINK", "PACKET", "ASH", "ECONET", "ATMSVC",
457 "RDS", "SNA", "IRDA", "PPPOX", "WANPIPE", "LLC", "IB", "CAN", "TIPC",
458 "BLUETOOTH", "IUCV", "RXRPC", "ISDN", "PHONET", "IEEE802154", "CAIF",
459 "ALG", "NFC", "VSOCK",
460};
461static DEFINE_STRARRAY(socket_families);
462
463static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
464 struct syscall_arg *arg)
465{
466 size_t printed = 0;
467 int mode = arg->val;
468
469 if (mode == F_OK) /* 0 */
470 return scnprintf(bf, size, "F");
471#define P_MODE(n) \
472 if (mode & n##_OK) { \
473 printed += scnprintf(bf + printed, size - printed, "%s", #n); \
474 mode &= ~n##_OK; \
475 }
476
477 P_MODE(R);
478 P_MODE(W);
479 P_MODE(X);
480#undef P_MODE
481
482 if (mode)
483 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
484
485 return printed;
486}
487
488#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
489
490static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
491 struct syscall_arg *arg);
492
493#define SCA_FILENAME syscall_arg__scnprintf_filename
494
495static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
496 struct syscall_arg *arg)
497{
498 int printed = 0, flags = arg->val;
499
500#define P_FLAG(n) \
501 if (flags & O_##n) { \
502 printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
503 flags &= ~O_##n; \
504 }
505
506 P_FLAG(CLOEXEC);
507 P_FLAG(NONBLOCK);
508#undef P_FLAG
509
510 if (flags)
511 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
512
513 return printed;
514}
515
516#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
517
518#ifndef GRND_NONBLOCK
519#define GRND_NONBLOCK 0x0001
520#endif
521#ifndef GRND_RANDOM
522#define GRND_RANDOM 0x0002
523#endif
524
525static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
526 struct syscall_arg *arg)
527{
528 int printed = 0, flags = arg->val;
529
530#define P_FLAG(n) \
531 if (flags & GRND_##n) { \
532 printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
533 flags &= ~GRND_##n; \
534 }
535
536 P_FLAG(RANDOM);
537 P_FLAG(NONBLOCK);
538#undef P_FLAG
539
540 if (flags)
541 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
542
543 return printed;
544}
545
546#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
547
548#define STRARRAY(name, array) \
549 { .scnprintf = SCA_STRARRAY, \
550 .parm = &strarray__##array, }
551
552#include "trace/beauty/arch_errno_names.c"
553#include "trace/beauty/eventfd.c"
554#include "trace/beauty/futex_op.c"
555#include "trace/beauty/futex_val3.c"
556#include "trace/beauty/mmap.c"
557#include "trace/beauty/mode_t.c"
558#include "trace/beauty/msg_flags.c"
559#include "trace/beauty/open_flags.c"
560#include "trace/beauty/perf_event_open.c"
561#include "trace/beauty/pid.c"
562#include "trace/beauty/sched_policy.c"
563#include "trace/beauty/seccomp.c"
564#include "trace/beauty/signum.c"
565#include "trace/beauty/socket_type.c"
566#include "trace/beauty/waitid_options.c"
567
568struct syscall_arg_fmt {
569 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
570 void *parm;
571 const char *name;
572 bool show_zero;
573};
574
575static struct syscall_fmt {
576 const char *name;
577 const char *alias;
578 struct syscall_arg_fmt arg[6];
579 u8 nr_args;
580 bool errpid;
581 bool timeout;
582 bool hexret;
583} syscall_fmts[] = {
584 { .name = "access",
585 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
586 { .name = "bpf",
587 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
588 { .name = "brk", .hexret = true,
589 .arg = { [0] = { .scnprintf = SCA_HEX, /* brk */ }, }, },
590 { .name = "clock_gettime",
591 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
592 { .name = "clone", .errpid = true, .nr_args = 5,
593 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
594 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
595 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
596 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
597 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
598 { .name = "close",
599 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
600 { .name = "epoll_ctl",
601 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
602 { .name = "eventfd2",
603 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
604 { .name = "fchmodat",
605 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
606 { .name = "fchownat",
607 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
608 { .name = "fcntl",
609 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
610 .parm = &strarrays__fcntl_cmds_arrays,
611 .show_zero = true, },
612 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
613 { .name = "flock",
614 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
615 { .name = "fstat", .alias = "newfstat", },
616 { .name = "fstatat", .alias = "newfstatat", },
617 { .name = "futex",
618 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
619 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
620 { .name = "futimesat",
621 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
622 { .name = "getitimer",
623 .arg = { [0] = STRARRAY(which, itimers), }, },
624 { .name = "getpid", .errpid = true, },
625 { .name = "getpgid", .errpid = true, },
626 { .name = "getppid", .errpid = true, },
627 { .name = "getrandom",
628 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
629 { .name = "getrlimit",
630 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
631 { .name = "gettid", .errpid = true, },
632 { .name = "ioctl",
633 .arg = {
634#if defined(__i386__) || defined(__x86_64__)
635/*
636 * FIXME: Make this available to all arches.
637 */
638 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
639 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
640#else
641 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
642#endif
643 { .name = "kcmp", .nr_args = 5,
644 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
645 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
646 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
647 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
648 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
649 { .name = "keyctl",
650 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
651 { .name = "kill",
652 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
653 { .name = "linkat",
654 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
655 { .name = "lseek",
656 .arg = { [2] = STRARRAY(whence, whences), }, },
657 { .name = "lstat", .alias = "newlstat", },
658 { .name = "madvise",
659 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
660 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
661 { .name = "mkdirat",
662 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
663 { .name = "mknodat",
664 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
665 { .name = "mlock",
666 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
667 { .name = "mlockall",
668 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
669 { .name = "mmap", .hexret = true,
670/* The standard mmap maps to old_mmap on s390x */
671#if defined(__s390x__)
672 .alias = "old_mmap",
673#endif
674 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
675 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
676 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, },
677 { .name = "mprotect",
678 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
679 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
680 { .name = "mq_unlink",
681 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
682 { .name = "mremap", .hexret = true,
683 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
684 [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ },
685 [4] = { .scnprintf = SCA_HEX, /* new_addr */ }, }, },
686 { .name = "munlock",
687 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
688 { .name = "munmap",
689 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
690 { .name = "name_to_handle_at",
691 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
692 { .name = "newfstatat",
693 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
694 { .name = "open",
695 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
696 { .name = "open_by_handle_at",
697 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
698 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
699 { .name = "openat",
700 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
701 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
702 { .name = "perf_event_open",
703 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
704 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
705 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
706 { .name = "pipe2",
707 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
708 { .name = "pkey_alloc",
709 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
710 { .name = "pkey_free",
711 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
712 { .name = "pkey_mprotect",
713 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
714 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
715 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
716 { .name = "poll", .timeout = true, },
717 { .name = "ppoll", .timeout = true, },
718 { .name = "prctl", .alias = "arch_prctl",
719 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
720 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
721 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
722 { .name = "pread", .alias = "pread64", },
723 { .name = "preadv", .alias = "pread", },
724 { .name = "prlimit64",
725 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
726 { .name = "pwrite", .alias = "pwrite64", },
727 { .name = "readlinkat",
728 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
729 { .name = "recvfrom",
730 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
731 { .name = "recvmmsg",
732 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
733 { .name = "recvmsg",
734 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
735 { .name = "renameat",
736 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
737 { .name = "rt_sigaction",
738 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
739 { .name = "rt_sigprocmask",
740 .arg = { [0] = STRARRAY(how, sighow), }, },
741 { .name = "rt_sigqueueinfo",
742 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
743 { .name = "rt_tgsigqueueinfo",
744 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
745 { .name = "sched_setscheduler",
746 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
747 { .name = "seccomp",
748 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
749 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
750 { .name = "select", .timeout = true, },
751 { .name = "sendmmsg",
752 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
753 { .name = "sendmsg",
754 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
755 { .name = "sendto",
756 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
757 { .name = "set_tid_address", .errpid = true, },
758 { .name = "setitimer",
759 .arg = { [0] = STRARRAY(which, itimers), }, },
760 { .name = "setrlimit",
761 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
762 { .name = "socket",
763 .arg = { [0] = STRARRAY(family, socket_families),
764 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, }, },
765 { .name = "socketpair",
766 .arg = { [0] = STRARRAY(family, socket_families),
767 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, }, },
768 { .name = "stat", .alias = "newstat", },
769 { .name = "statx",
770 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
771 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
772 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
773 { .name = "swapoff",
774 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
775 { .name = "swapon",
776 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
777 { .name = "symlinkat",
778 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
779 { .name = "tgkill",
780 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
781 { .name = "tkill",
782 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
783 { .name = "uname", .alias = "newuname", },
784 { .name = "unlinkat",
785 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
786 { .name = "utimensat",
787 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
788 { .name = "wait4", .errpid = true,
789 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
790 { .name = "waitid", .errpid = true,
791 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
792};
793
794static int syscall_fmt__cmp(const void *name, const void *fmtp)
795{
796 const struct syscall_fmt *fmt = fmtp;
797 return strcmp(name, fmt->name);
798}
799
800static struct syscall_fmt *syscall_fmt__find(const char *name)
801{
802 const int nmemb = ARRAY_SIZE(syscall_fmts);
803 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
804}
805
806struct syscall {
807 struct event_format *tp_format;
808 int nr_args;
809 struct format_field *args;
810 const char *name;
811 bool is_exit;
812 struct syscall_fmt *fmt;
813 struct syscall_arg_fmt *arg_fmt;
814};
815
816/*
817 * We need to have this 'calculated' boolean because in some cases we really
818 * don't know what is the duration of a syscall, for instance, when we start
819 * a session and some threads are waiting for a syscall to finish, say 'poll',
820 * in which case all we can do is to print "( ? ) for duration and for the
821 * start timestamp.
822 */
823static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
824{
825 double duration = (double)t / NSEC_PER_MSEC;
826 size_t printed = fprintf(fp, "(");
827
828 if (!calculated)
829 printed += fprintf(fp, " ");
830 else if (duration >= 1.0)
831 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
832 else if (duration >= 0.01)
833 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
834 else
835 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
836 return printed + fprintf(fp, "): ");
837}
838
839/**
840 * filename.ptr: The filename char pointer that will be vfs_getname'd
841 * filename.entry_str_pos: Where to insert the string translated from
842 * filename.ptr by the vfs_getname tracepoint/kprobe.
843 * ret_scnprintf: syscall args may set this to a different syscall return
844 * formatter, for instance, fcntl may return fds, file flags, etc.
845 */
846struct thread_trace {
847 u64 entry_time;
848 bool entry_pending;
849 unsigned long nr_events;
850 unsigned long pfmaj, pfmin;
851 char *entry_str;
852 double runtime_ms;
853 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
854 struct {
855 unsigned long ptr;
856 short int entry_str_pos;
857 bool pending_open;
858 unsigned int namelen;
859 char *name;
860 } filename;
861 struct {
862 int max;
863 char **table;
864 } paths;
865
866 struct intlist *syscall_stats;
867};
868
869static struct thread_trace *thread_trace__new(void)
870{
871 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
872
873 if (ttrace)
874 ttrace->paths.max = -1;
875
876 ttrace->syscall_stats = intlist__new(NULL);
877
878 return ttrace;
879}
880
881static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
882{
883 struct thread_trace *ttrace;
884
885 if (thread == NULL)
886 goto fail;
887
888 if (thread__priv(thread) == NULL)
889 thread__set_priv(thread, thread_trace__new());
890
891 if (thread__priv(thread) == NULL)
892 goto fail;
893
894 ttrace = thread__priv(thread);
895 ++ttrace->nr_events;
896
897 return ttrace;
898fail:
899 color_fprintf(fp, PERF_COLOR_RED,
900 "WARNING: not enough memory, dropping samples!\n");
901 return NULL;
902}
903
904
905void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
906 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
907{
908 struct thread_trace *ttrace = thread__priv(arg->thread);
909
910 ttrace->ret_scnprintf = ret_scnprintf;
911}
912
913#define TRACE_PFMAJ (1 << 0)
914#define TRACE_PFMIN (1 << 1)
915
916static const size_t trace__entry_str_size = 2048;
917
918static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
919{
920 struct thread_trace *ttrace = thread__priv(thread);
921
922 if (fd > ttrace->paths.max) {
923 char **npath = realloc(ttrace->paths.table, (fd + 1) * sizeof(char *));
924
925 if (npath == NULL)
926 return -1;
927
928 if (ttrace->paths.max != -1) {
929 memset(npath + ttrace->paths.max + 1, 0,
930 (fd - ttrace->paths.max) * sizeof(char *));
931 } else {
932 memset(npath, 0, (fd + 1) * sizeof(char *));
933 }
934
935 ttrace->paths.table = npath;
936 ttrace->paths.max = fd;
937 }
938
939 ttrace->paths.table[fd] = strdup(pathname);
940
941 return ttrace->paths.table[fd] != NULL ? 0 : -1;
942}
943
944static int thread__read_fd_path(struct thread *thread, int fd)
945{
946 char linkname[PATH_MAX], pathname[PATH_MAX];
947 struct stat st;
948 int ret;
949
950 if (thread->pid_ == thread->tid) {
951 scnprintf(linkname, sizeof(linkname),
952 "/proc/%d/fd/%d", thread->pid_, fd);
953 } else {
954 scnprintf(linkname, sizeof(linkname),
955 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
956 }
957
958 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
959 return -1;
960
961 ret = readlink(linkname, pathname, sizeof(pathname));
962
963 if (ret < 0 || ret > st.st_size)
964 return -1;
965
966 pathname[ret] = '\0';
967 return trace__set_fd_pathname(thread, fd, pathname);
968}
969
970static const char *thread__fd_path(struct thread *thread, int fd,
971 struct trace *trace)
972{
973 struct thread_trace *ttrace = thread__priv(thread);
974
975 if (ttrace == NULL)
976 return NULL;
977
978 if (fd < 0)
979 return NULL;
980
981 if ((fd > ttrace->paths.max || ttrace->paths.table[fd] == NULL)) {
982 if (!trace->live)
983 return NULL;
984 ++trace->stats.proc_getname;
985 if (thread__read_fd_path(thread, fd))
986 return NULL;
987 }
988
989 return ttrace->paths.table[fd];
990}
991
992size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
993{
994 int fd = arg->val;
995 size_t printed = scnprintf(bf, size, "%d", fd);
996 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
997
998 if (path)
999 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1000
1001 return printed;
1002}
1003
1004size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1005{
1006 size_t printed = scnprintf(bf, size, "%d", fd);
1007 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1008
1009 if (thread) {
1010 const char *path = thread__fd_path(thread, fd, trace);
1011
1012 if (path)
1013 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1014
1015 thread__put(thread);
1016 }
1017
1018 return printed;
1019}
1020
1021static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1022 struct syscall_arg *arg)
1023{
1024 int fd = arg->val;
1025 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1026 struct thread_trace *ttrace = thread__priv(arg->thread);
1027
1028 if (ttrace && fd >= 0 && fd <= ttrace->paths.max)
1029 zfree(&ttrace->paths.table[fd]);
1030
1031 return printed;
1032}
1033
1034static void thread__set_filename_pos(struct thread *thread, const char *bf,
1035 unsigned long ptr)
1036{
1037 struct thread_trace *ttrace = thread__priv(thread);
1038
1039 ttrace->filename.ptr = ptr;
1040 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1041}
1042
1043static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1044 struct syscall_arg *arg)
1045{
1046 unsigned long ptr = arg->val;
1047
1048 if (!arg->trace->vfs_getname)
1049 return scnprintf(bf, size, "%#x", ptr);
1050
1051 thread__set_filename_pos(arg->thread, bf, ptr);
1052 return 0;
1053}
1054
1055static bool trace__filter_duration(struct trace *trace, double t)
1056{
1057 return t < (trace->duration_filter * NSEC_PER_MSEC);
1058}
1059
1060static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1061{
1062 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1063
1064 return fprintf(fp, "%10.3f ", ts);
1065}
1066
1067/*
1068 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1069 * using ttrace->entry_time for a thread that receives a sys_exit without
1070 * first having received a sys_enter ("poll" issued before tracing session
1071 * starts, lost sys_enter exit due to ring buffer overflow).
1072 */
1073static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1074{
1075 if (tstamp > 0)
1076 return __trace__fprintf_tstamp(trace, tstamp, fp);
1077
1078 return fprintf(fp, " ? ");
1079}
1080
1081static bool done = false;
1082static bool interrupted = false;
1083
1084static void sig_handler(int sig)
1085{
1086 done = true;
1087 interrupted = sig == SIGINT;
1088}
1089
1090static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1091 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1092{
1093 size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
1094 printed += fprintf_duration(duration, duration_calculated, fp);
1095
1096 if (trace->multiple_threads) {
1097 if (trace->show_comm)
1098 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1099 printed += fprintf(fp, "%d ", thread->tid);
1100 }
1101
1102 return printed;
1103}
1104
1105static int trace__process_event(struct trace *trace, struct machine *machine,
1106 union perf_event *event, struct perf_sample *sample)
1107{
1108 int ret = 0;
1109
1110 switch (event->header.type) {
1111 case PERF_RECORD_LOST:
1112 color_fprintf(trace->output, PERF_COLOR_RED,
1113 "LOST %" PRIu64 " events!\n", event->lost.lost);
1114 ret = machine__process_lost_event(machine, event, sample);
1115 break;
1116 default:
1117 ret = machine__process_event(machine, event, sample);
1118 break;
1119 }
1120
1121 return ret;
1122}
1123
1124static int trace__tool_process(struct perf_tool *tool,
1125 union perf_event *event,
1126 struct perf_sample *sample,
1127 struct machine *machine)
1128{
1129 struct trace *trace = container_of(tool, struct trace, tool);
1130 return trace__process_event(trace, machine, event, sample);
1131}
1132
1133static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1134{
1135 struct machine *machine = vmachine;
1136
1137 if (machine->kptr_restrict_warned)
1138 return NULL;
1139
1140 if (symbol_conf.kptr_restrict) {
1141 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1142 "Check /proc/sys/kernel/kptr_restrict.\n\n"
1143 "Kernel samples will not be resolved.\n");
1144 machine->kptr_restrict_warned = true;
1145 return NULL;
1146 }
1147
1148 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1149}
1150
1151static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
1152{
1153 int err = symbol__init(NULL);
1154
1155 if (err)
1156 return err;
1157
1158 trace->host = machine__new_host();
1159 if (trace->host == NULL)
1160 return -ENOMEM;
1161
1162 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1163 if (err < 0)
1164 goto out;
1165
1166 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1167 evlist->threads, trace__tool_process, false,
1168 trace->opts.proc_map_timeout, 1);
1169out:
1170 if (err)
1171 symbol__exit();
1172
1173 return err;
1174}
1175
1176static void trace__symbols__exit(struct trace *trace)
1177{
1178 machine__exit(trace->host);
1179 trace->host = NULL;
1180
1181 symbol__exit();
1182}
1183
1184static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1185{
1186 int idx;
1187
1188 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1189 nr_args = sc->fmt->nr_args;
1190
1191 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1192 if (sc->arg_fmt == NULL)
1193 return -1;
1194
1195 for (idx = 0; idx < nr_args; ++idx) {
1196 if (sc->fmt)
1197 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1198 }
1199
1200 sc->nr_args = nr_args;
1201 return 0;
1202}
1203
1204static int syscall__set_arg_fmts(struct syscall *sc)
1205{
1206 struct format_field *field;
1207 int idx = 0, len;
1208
1209 for (field = sc->args; field; field = field->next, ++idx) {
1210 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1211 continue;
1212
1213 if (strcmp(field->type, "const char *") == 0 &&
1214 (strcmp(field->name, "filename") == 0 ||
1215 strcmp(field->name, "path") == 0 ||
1216 strcmp(field->name, "pathname") == 0))
1217 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1218 else if (field->flags & FIELD_IS_POINTER)
1219 sc->arg_fmt[idx].scnprintf = syscall_arg__scnprintf_hex;
1220 else if (strcmp(field->type, "pid_t") == 0)
1221 sc->arg_fmt[idx].scnprintf = SCA_PID;
1222 else if (strcmp(field->type, "umode_t") == 0)
1223 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1224 else if ((strcmp(field->type, "int") == 0 ||
1225 strcmp(field->type, "unsigned int") == 0 ||
1226 strcmp(field->type, "long") == 0) &&
1227 (len = strlen(field->name)) >= 2 &&
1228 strcmp(field->name + len - 2, "fd") == 0) {
1229 /*
1230 * /sys/kernel/tracing/events/syscalls/sys_enter*
1231 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1232 * 65 int
1233 * 23 unsigned int
1234 * 7 unsigned long
1235 */
1236 sc->arg_fmt[idx].scnprintf = SCA_FD;
1237 }
1238 }
1239
1240 return 0;
1241}
1242
1243static int trace__read_syscall_info(struct trace *trace, int id)
1244{
1245 char tp_name[128];
1246 struct syscall *sc;
1247 const char *name = syscalltbl__name(trace->sctbl, id);
1248
1249 if (name == NULL)
1250 return -1;
1251
1252 if (id > trace->syscalls.max) {
1253 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1254
1255 if (nsyscalls == NULL)
1256 return -1;
1257
1258 if (trace->syscalls.max != -1) {
1259 memset(nsyscalls + trace->syscalls.max + 1, 0,
1260 (id - trace->syscalls.max) * sizeof(*sc));
1261 } else {
1262 memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
1263 }
1264
1265 trace->syscalls.table = nsyscalls;
1266 trace->syscalls.max = id;
1267 }
1268
1269 sc = trace->syscalls.table + id;
1270 sc->name = name;
1271
1272 sc->fmt = syscall_fmt__find(sc->name);
1273
1274 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1275 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1276
1277 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1278 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1279 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1280 }
1281
1282 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1283 return -1;
1284
1285 if (IS_ERR(sc->tp_format))
1286 return -1;
1287
1288 sc->args = sc->tp_format->format.fields;
1289 /*
1290 * We need to check and discard the first variable '__syscall_nr'
1291 * or 'nr' that mean the syscall number. It is needless here.
1292 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1293 */
1294 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1295 sc->args = sc->args->next;
1296 --sc->nr_args;
1297 }
1298
1299 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1300
1301 return syscall__set_arg_fmts(sc);
1302}
1303
1304static int trace__validate_ev_qualifier(struct trace *trace)
1305{
1306 int err = 0, i;
1307 size_t nr_allocated;
1308 struct str_node *pos;
1309
1310 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
1311 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
1312 sizeof(trace->ev_qualifier_ids.entries[0]));
1313
1314 if (trace->ev_qualifier_ids.entries == NULL) {
1315 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1316 trace->output);
1317 err = -EINVAL;
1318 goto out;
1319 }
1320
1321 nr_allocated = trace->ev_qualifier_ids.nr;
1322 i = 0;
1323
1324 strlist__for_each_entry(pos, trace->ev_qualifier) {
1325 const char *sc = pos->s;
1326 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1327
1328 if (id < 0) {
1329 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1330 if (id >= 0)
1331 goto matches;
1332
1333 if (err == 0) {
1334 fputs("Error:\tInvalid syscall ", trace->output);
1335 err = -EINVAL;
1336 } else {
1337 fputs(", ", trace->output);
1338 }
1339
1340 fputs(sc, trace->output);
1341 }
1342matches:
1343 trace->ev_qualifier_ids.entries[i++] = id;
1344 if (match_next == -1)
1345 continue;
1346
1347 while (1) {
1348 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1349 if (id < 0)
1350 break;
1351 if (nr_allocated == trace->ev_qualifier_ids.nr) {
1352 void *entries;
1353
1354 nr_allocated += 8;
1355 entries = realloc(trace->ev_qualifier_ids.entries,
1356 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1357 if (entries == NULL) {
1358 err = -ENOMEM;
1359 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1360 goto out_free;
1361 }
1362 trace->ev_qualifier_ids.entries = entries;
1363 }
1364 trace->ev_qualifier_ids.nr++;
1365 trace->ev_qualifier_ids.entries[i++] = id;
1366 }
1367 }
1368
1369 if (err < 0) {
1370 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
1371 "\nHint:\tand: 'man syscalls'\n", trace->output);
1372out_free:
1373 zfree(&trace->ev_qualifier_ids.entries);
1374 trace->ev_qualifier_ids.nr = 0;
1375 }
1376out:
1377 return err;
1378}
1379
1380/*
1381 * args is to be interpreted as a series of longs but we need to handle
1382 * 8-byte unaligned accesses. args points to raw_data within the event
1383 * and raw_data is guaranteed to be 8-byte unaligned because it is
1384 * preceded by raw_size which is a u32. So we need to copy args to a temp
1385 * variable to read it. Most notably this avoids extended load instructions
1386 * on unaligned addresses
1387 */
1388unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1389{
1390 unsigned long val;
1391 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1392
1393 memcpy(&val, p, sizeof(val));
1394 return val;
1395}
1396
1397static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1398 struct syscall_arg *arg)
1399{
1400 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1401 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1402
1403 return scnprintf(bf, size, "arg%d: ", arg->idx);
1404}
1405
1406static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1407 struct syscall_arg *arg, unsigned long val)
1408{
1409 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1410 arg->val = val;
1411 if (sc->arg_fmt[arg->idx].parm)
1412 arg->parm = sc->arg_fmt[arg->idx].parm;
1413 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1414 }
1415 return scnprintf(bf, size, "%ld", val);
1416}
1417
1418static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1419 unsigned char *args, struct trace *trace,
1420 struct thread *thread)
1421{
1422 size_t printed = 0;
1423 unsigned long val;
1424 u8 bit = 1;
1425 struct syscall_arg arg = {
1426 .args = args,
1427 .idx = 0,
1428 .mask = 0,
1429 .trace = trace,
1430 .thread = thread,
1431 };
1432 struct thread_trace *ttrace = thread__priv(thread);
1433
1434 /*
1435 * Things like fcntl will set this in its 'cmd' formatter to pick the
1436 * right formatter for the return value (an fd? file flags?), which is
1437 * not needed for syscalls that always return a given type, say an fd.
1438 */
1439 ttrace->ret_scnprintf = NULL;
1440
1441 if (sc->args != NULL) {
1442 struct format_field *field;
1443
1444 for (field = sc->args; field;
1445 field = field->next, ++arg.idx, bit <<= 1) {
1446 if (arg.mask & bit)
1447 continue;
1448
1449 val = syscall_arg__val(&arg, arg.idx);
1450
1451 /*
1452 * Suppress this argument if its value is zero and
1453 * and we don't have a string associated in an
1454 * strarray for it.
1455 */
1456 if (val == 0 &&
1457 !(sc->arg_fmt &&
1458 (sc->arg_fmt[arg.idx].show_zero ||
1459 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1460 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1461 sc->arg_fmt[arg.idx].parm))
1462 continue;
1463
1464 printed += scnprintf(bf + printed, size - printed,
1465 "%s%s: ", printed ? ", " : "", field->name);
1466 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1467 }
1468 } else if (IS_ERR(sc->tp_format)) {
1469 /*
1470 * If we managed to read the tracepoint /format file, then we
1471 * may end up not having any args, like with gettid(), so only
1472 * print the raw args when we didn't manage to read it.
1473 */
1474 while (arg.idx < sc->nr_args) {
1475 if (arg.mask & bit)
1476 goto next_arg;
1477 val = syscall_arg__val(&arg, arg.idx);
1478 if (printed)
1479 printed += scnprintf(bf + printed, size - printed, ", ");
1480 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1481 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1482next_arg:
1483 ++arg.idx;
1484 bit <<= 1;
1485 }
1486 }
1487
1488 return printed;
1489}
1490
1491typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
1492 union perf_event *event,
1493 struct perf_sample *sample);
1494
1495static struct syscall *trace__syscall_info(struct trace *trace,
1496 struct perf_evsel *evsel, int id)
1497{
1498
1499 if (id < 0) {
1500
1501 /*
1502 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1503 * before that, leaving at a higher verbosity level till that is
1504 * explained. Reproduced with plain ftrace with:
1505 *
1506 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1507 * grep "NR -1 " /t/trace_pipe
1508 *
1509 * After generating some load on the machine.
1510 */
1511 if (verbose > 1) {
1512 static u64 n;
1513 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1514 id, perf_evsel__name(evsel), ++n);
1515 }
1516 return NULL;
1517 }
1518
1519 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
1520 trace__read_syscall_info(trace, id))
1521 goto out_cant_read;
1522
1523 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
1524 goto out_cant_read;
1525
1526 return &trace->syscalls.table[id];
1527
1528out_cant_read:
1529 if (verbose > 0) {
1530 fprintf(trace->output, "Problems reading syscall %d", id);
1531 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
1532 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1533 fputs(" information\n", trace->output);
1534 }
1535 return NULL;
1536}
1537
1538static void thread__update_stats(struct thread_trace *ttrace,
1539 int id, struct perf_sample *sample)
1540{
1541 struct int_node *inode;
1542 struct stats *stats;
1543 u64 duration = 0;
1544
1545 inode = intlist__findnew(ttrace->syscall_stats, id);
1546 if (inode == NULL)
1547 return;
1548
1549 stats = inode->priv;
1550 if (stats == NULL) {
1551 stats = malloc(sizeof(struct stats));
1552 if (stats == NULL)
1553 return;
1554 init_stats(stats);
1555 inode->priv = stats;
1556 }
1557
1558 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1559 duration = sample->time - ttrace->entry_time;
1560
1561 update_stats(stats, duration);
1562}
1563
1564static int trace__printf_interrupted_entry(struct trace *trace)
1565{
1566 struct thread_trace *ttrace;
1567 size_t printed;
1568
1569 if (trace->failure_only || trace->current == NULL)
1570 return 0;
1571
1572 ttrace = thread__priv(trace->current);
1573
1574 if (!ttrace->entry_pending)
1575 return 0;
1576
1577 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1578 printed += fprintf(trace->output, "%-70s) ...\n", ttrace->entry_str);
1579 ttrace->entry_pending = false;
1580
1581 return printed;
1582}
1583
1584static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
1585 struct perf_sample *sample, struct thread *thread)
1586{
1587 int printed = 0;
1588
1589 if (trace->print_sample) {
1590 double ts = (double)sample->time / NSEC_PER_MSEC;
1591
1592 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1593 perf_evsel__name(evsel), ts,
1594 thread__comm_str(thread),
1595 sample->pid, sample->tid, sample->cpu);
1596 }
1597
1598 return printed;
1599}
1600
1601static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
1602 union perf_event *event __maybe_unused,
1603 struct perf_sample *sample)
1604{
1605 char *msg;
1606 void *args;
1607 size_t printed = 0;
1608 struct thread *thread;
1609 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1610 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1611 struct thread_trace *ttrace;
1612
1613 if (sc == NULL)
1614 return -1;
1615
1616 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1617 ttrace = thread__trace(thread, trace->output);
1618 if (ttrace == NULL)
1619 goto out_put;
1620
1621 trace__fprintf_sample(trace, evsel, sample, thread);
1622
1623 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1624
1625 if (ttrace->entry_str == NULL) {
1626 ttrace->entry_str = malloc(trace__entry_str_size);
1627 if (!ttrace->entry_str)
1628 goto out_put;
1629 }
1630
1631 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1632 trace__printf_interrupted_entry(trace);
1633
1634 ttrace->entry_time = sample->time;
1635 msg = ttrace->entry_str;
1636 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1637
1638 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1639 args, trace, thread);
1640
1641 if (sc->is_exit) {
1642 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1643 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
1644 fprintf(trace->output, "%-70s)\n", ttrace->entry_str);
1645 }
1646 } else {
1647 ttrace->entry_pending = true;
1648 /* See trace__vfs_getname & trace__sys_exit */
1649 ttrace->filename.pending_open = false;
1650 }
1651
1652 if (trace->current != thread) {
1653 thread__put(trace->current);
1654 trace->current = thread__get(thread);
1655 }
1656 err = 0;
1657out_put:
1658 thread__put(thread);
1659 return err;
1660}
1661
1662static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
1663 struct perf_sample *sample,
1664 struct callchain_cursor *cursor)
1665{
1666 struct addr_location al;
1667 int max_stack = evsel->attr.sample_max_stack ?
1668 evsel->attr.sample_max_stack :
1669 trace->max_stack;
1670
1671 if (machine__resolve(trace->host, &al, sample) < 0 ||
1672 thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack))
1673 return -1;
1674
1675 return 0;
1676}
1677
1678static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
1679{
1680 /* TODO: user-configurable print_opts */
1681 const unsigned int print_opts = EVSEL__PRINT_SYM |
1682 EVSEL__PRINT_DSO |
1683 EVSEL__PRINT_UNKNOWN_AS_ADDR;
1684
1685 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
1686}
1687
1688static const char *errno_to_name(struct perf_evsel *evsel, int err)
1689{
1690 struct perf_env *env = perf_evsel__env(evsel);
1691 const char *arch_name = perf_env__arch(env);
1692
1693 return arch_syscalls__strerrno(arch_name, err);
1694}
1695
1696static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
1697 union perf_event *event __maybe_unused,
1698 struct perf_sample *sample)
1699{
1700 long ret;
1701 u64 duration = 0;
1702 bool duration_calculated = false;
1703 struct thread *thread;
1704 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0;
1705 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1706 struct thread_trace *ttrace;
1707
1708 if (sc == NULL)
1709 return -1;
1710
1711 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1712 ttrace = thread__trace(thread, trace->output);
1713 if (ttrace == NULL)
1714 goto out_put;
1715
1716 trace__fprintf_sample(trace, evsel, sample, thread);
1717
1718 if (trace->summary)
1719 thread__update_stats(ttrace, id, sample);
1720
1721 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
1722
1723 if (id == trace->open_id && ret >= 0 && ttrace->filename.pending_open) {
1724 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
1725 ttrace->filename.pending_open = false;
1726 ++trace->stats.vfs_getname;
1727 }
1728
1729 if (ttrace->entry_time) {
1730 duration = sample->time - ttrace->entry_time;
1731 if (trace__filter_duration(trace, duration))
1732 goto out;
1733 duration_calculated = true;
1734 } else if (trace->duration_filter)
1735 goto out;
1736
1737 if (sample->callchain) {
1738 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1739 if (callchain_ret == 0) {
1740 if (callchain_cursor.nr < trace->min_stack)
1741 goto out;
1742 callchain_ret = 1;
1743 }
1744 }
1745
1746 if (trace->summary_only || (ret >= 0 && trace->failure_only))
1747 goto out;
1748
1749 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
1750
1751 if (ttrace->entry_pending) {
1752 fprintf(trace->output, "%-70s", ttrace->entry_str);
1753 } else {
1754 fprintf(trace->output, " ... [");
1755 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
1756 fprintf(trace->output, "]: %s()", sc->name);
1757 }
1758
1759 if (sc->fmt == NULL) {
1760 if (ret < 0)
1761 goto errno_print;
1762signed_print:
1763 fprintf(trace->output, ") = %ld", ret);
1764 } else if (ret < 0) {
1765errno_print: {
1766 char bf[STRERR_BUFSIZE];
1767 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
1768 *e = errno_to_name(evsel, -ret);
1769
1770 fprintf(trace->output, ") = -1 %s %s", e, emsg);
1771 }
1772 } else if (ret == 0 && sc->fmt->timeout)
1773 fprintf(trace->output, ") = 0 Timeout");
1774 else if (ttrace->ret_scnprintf) {
1775 char bf[1024];
1776 struct syscall_arg arg = {
1777 .val = ret,
1778 .thread = thread,
1779 .trace = trace,
1780 };
1781 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
1782 ttrace->ret_scnprintf = NULL;
1783 fprintf(trace->output, ") = %s", bf);
1784 } else if (sc->fmt->hexret)
1785 fprintf(trace->output, ") = %#lx", ret);
1786 else if (sc->fmt->errpid) {
1787 struct thread *child = machine__find_thread(trace->host, ret, ret);
1788
1789 if (child != NULL) {
1790 fprintf(trace->output, ") = %ld", ret);
1791 if (child->comm_set)
1792 fprintf(trace->output, " (%s)", thread__comm_str(child));
1793 thread__put(child);
1794 }
1795 } else
1796 goto signed_print;
1797
1798 fputc('\n', trace->output);
1799
1800 if (callchain_ret > 0)
1801 trace__fprintf_callchain(trace, sample);
1802 else if (callchain_ret < 0)
1803 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1804out:
1805 ttrace->entry_pending = false;
1806 err = 0;
1807out_put:
1808 thread__put(thread);
1809 return err;
1810}
1811
1812static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
1813 union perf_event *event __maybe_unused,
1814 struct perf_sample *sample)
1815{
1816 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1817 struct thread_trace *ttrace;
1818 size_t filename_len, entry_str_len, to_move;
1819 ssize_t remaining_space;
1820 char *pos;
1821 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
1822
1823 if (!thread)
1824 goto out;
1825
1826 ttrace = thread__priv(thread);
1827 if (!ttrace)
1828 goto out_put;
1829
1830 filename_len = strlen(filename);
1831 if (filename_len == 0)
1832 goto out_put;
1833
1834 if (ttrace->filename.namelen < filename_len) {
1835 char *f = realloc(ttrace->filename.name, filename_len + 1);
1836
1837 if (f == NULL)
1838 goto out_put;
1839
1840 ttrace->filename.namelen = filename_len;
1841 ttrace->filename.name = f;
1842 }
1843
1844 strcpy(ttrace->filename.name, filename);
1845 ttrace->filename.pending_open = true;
1846
1847 if (!ttrace->filename.ptr)
1848 goto out_put;
1849
1850 entry_str_len = strlen(ttrace->entry_str);
1851 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
1852 if (remaining_space <= 0)
1853 goto out_put;
1854
1855 if (filename_len > (size_t)remaining_space) {
1856 filename += filename_len - remaining_space;
1857 filename_len = remaining_space;
1858 }
1859
1860 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
1861 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
1862 memmove(pos + filename_len, pos, to_move);
1863 memcpy(pos, filename, filename_len);
1864
1865 ttrace->filename.ptr = 0;
1866 ttrace->filename.entry_str_pos = 0;
1867out_put:
1868 thread__put(thread);
1869out:
1870 return 0;
1871}
1872
1873static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
1874 union perf_event *event __maybe_unused,
1875 struct perf_sample *sample)
1876{
1877 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
1878 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
1879 struct thread *thread = machine__findnew_thread(trace->host,
1880 sample->pid,
1881 sample->tid);
1882 struct thread_trace *ttrace = thread__trace(thread, trace->output);
1883
1884 if (ttrace == NULL)
1885 goto out_dump;
1886
1887 ttrace->runtime_ms += runtime_ms;
1888 trace->runtime_ms += runtime_ms;
1889out_put:
1890 thread__put(thread);
1891 return 0;
1892
1893out_dump:
1894 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
1895 evsel->name,
1896 perf_evsel__strval(evsel, sample, "comm"),
1897 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
1898 runtime,
1899 perf_evsel__intval(evsel, sample, "vruntime"));
1900 goto out_put;
1901}
1902
1903static int bpf_output__printer(enum binary_printer_ops op,
1904 unsigned int val, void *extra __maybe_unused, FILE *fp)
1905{
1906 unsigned char ch = (unsigned char)val;
1907
1908 switch (op) {
1909 case BINARY_PRINT_CHAR_DATA:
1910 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
1911 case BINARY_PRINT_DATA_BEGIN:
1912 case BINARY_PRINT_LINE_BEGIN:
1913 case BINARY_PRINT_ADDR:
1914 case BINARY_PRINT_NUM_DATA:
1915 case BINARY_PRINT_NUM_PAD:
1916 case BINARY_PRINT_SEP:
1917 case BINARY_PRINT_CHAR_PAD:
1918 case BINARY_PRINT_LINE_END:
1919 case BINARY_PRINT_DATA_END:
1920 default:
1921 break;
1922 }
1923
1924 return 0;
1925}
1926
1927static void bpf_output__fprintf(struct trace *trace,
1928 struct perf_sample *sample)
1929{
1930 binary__fprintf(sample->raw_data, sample->raw_size, 8,
1931 bpf_output__printer, NULL, trace->output);
1932}
1933
1934static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
1935 union perf_event *event __maybe_unused,
1936 struct perf_sample *sample)
1937{
1938 int callchain_ret = 0;
1939
1940 if (sample->callchain) {
1941 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1942 if (callchain_ret == 0) {
1943 if (callchain_cursor.nr < trace->min_stack)
1944 goto out;
1945 callchain_ret = 1;
1946 }
1947 }
1948
1949 trace__printf_interrupted_entry(trace);
1950 trace__fprintf_tstamp(trace, sample->time, trace->output);
1951
1952 if (trace->trace_syscalls)
1953 fprintf(trace->output, "( ): ");
1954
1955 fprintf(trace->output, "%s:", evsel->name);
1956
1957 if (perf_evsel__is_bpf_output(evsel)) {
1958 bpf_output__fprintf(trace, sample);
1959 } else if (evsel->tp_format) {
1960 event_format__fprintf(evsel->tp_format, sample->cpu,
1961 sample->raw_data, sample->raw_size,
1962 trace->output);
1963 }
1964
1965 fprintf(trace->output, "\n");
1966
1967 if (callchain_ret > 0)
1968 trace__fprintf_callchain(trace, sample);
1969 else if (callchain_ret < 0)
1970 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1971out:
1972 return 0;
1973}
1974
1975static void print_location(FILE *f, struct perf_sample *sample,
1976 struct addr_location *al,
1977 bool print_dso, bool print_sym)
1978{
1979
1980 if ((verbose > 0 || print_dso) && al->map)
1981 fprintf(f, "%s@", al->map->dso->long_name);
1982
1983 if ((verbose > 0 || print_sym) && al->sym)
1984 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
1985 al->addr - al->sym->start);
1986 else if (al->map)
1987 fprintf(f, "0x%" PRIx64, al->addr);
1988 else
1989 fprintf(f, "0x%" PRIx64, sample->addr);
1990}
1991
1992static int trace__pgfault(struct trace *trace,
1993 struct perf_evsel *evsel,
1994 union perf_event *event __maybe_unused,
1995 struct perf_sample *sample)
1996{
1997 struct thread *thread;
1998 struct addr_location al;
1999 char map_type = 'd';
2000 struct thread_trace *ttrace;
2001 int err = -1;
2002 int callchain_ret = 0;
2003
2004 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2005
2006 if (sample->callchain) {
2007 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2008 if (callchain_ret == 0) {
2009 if (callchain_cursor.nr < trace->min_stack)
2010 goto out_put;
2011 callchain_ret = 1;
2012 }
2013 }
2014
2015 ttrace = thread__trace(thread, trace->output);
2016 if (ttrace == NULL)
2017 goto out_put;
2018
2019 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2020 ttrace->pfmaj++;
2021 else
2022 ttrace->pfmin++;
2023
2024 if (trace->summary_only)
2025 goto out;
2026
2027 thread__find_addr_location(thread, sample->cpumode, MAP__FUNCTION,
2028 sample->ip, &al);
2029
2030 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2031
2032 fprintf(trace->output, "%sfault [",
2033 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2034 "maj" : "min");
2035
2036 print_location(trace->output, sample, &al, false, true);
2037
2038 fprintf(trace->output, "] => ");
2039
2040 thread__find_addr_location(thread, sample->cpumode, MAP__VARIABLE,
2041 sample->addr, &al);
2042
2043 if (!al.map) {
2044 thread__find_addr_location(thread, sample->cpumode,
2045 MAP__FUNCTION, sample->addr, &al);
2046
2047 if (al.map)
2048 map_type = 'x';
2049 else
2050 map_type = '?';
2051 }
2052
2053 print_location(trace->output, sample, &al, true, false);
2054
2055 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2056
2057 if (callchain_ret > 0)
2058 trace__fprintf_callchain(trace, sample);
2059 else if (callchain_ret < 0)
2060 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2061out:
2062 err = 0;
2063out_put:
2064 thread__put(thread);
2065 return err;
2066}
2067
2068static void trace__set_base_time(struct trace *trace,
2069 struct perf_evsel *evsel,
2070 struct perf_sample *sample)
2071{
2072 /*
2073 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2074 * and don't use sample->time unconditionally, we may end up having
2075 * some other event in the future without PERF_SAMPLE_TIME for good
2076 * reason, i.e. we may not be interested in its timestamps, just in
2077 * it taking place, picking some piece of information when it
2078 * appears in our event stream (vfs_getname comes to mind).
2079 */
2080 if (trace->base_time == 0 && !trace->full_time &&
2081 (evsel->attr.sample_type & PERF_SAMPLE_TIME))
2082 trace->base_time = sample->time;
2083}
2084
2085static int trace__process_sample(struct perf_tool *tool,
2086 union perf_event *event,
2087 struct perf_sample *sample,
2088 struct perf_evsel *evsel,
2089 struct machine *machine __maybe_unused)
2090{
2091 struct trace *trace = container_of(tool, struct trace, tool);
2092 struct thread *thread;
2093 int err = 0;
2094
2095 tracepoint_handler handler = evsel->handler;
2096
2097 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2098 if (thread && thread__is_filtered(thread))
2099 goto out;
2100
2101 trace__set_base_time(trace, evsel, sample);
2102
2103 if (handler) {
2104 ++trace->nr_events;
2105 handler(trace, evsel, event, sample);
2106 }
2107out:
2108 thread__put(thread);
2109 return err;
2110}
2111
2112static int trace__record(struct trace *trace, int argc, const char **argv)
2113{
2114 unsigned int rec_argc, i, j;
2115 const char **rec_argv;
2116 const char * const record_args[] = {
2117 "record",
2118 "-R",
2119 "-m", "1024",
2120 "-c", "1",
2121 };
2122
2123 const char * const sc_args[] = { "-e", };
2124 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2125 const char * const majpf_args[] = { "-e", "major-faults" };
2126 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2127 const char * const minpf_args[] = { "-e", "minor-faults" };
2128 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2129
2130 /* +1 is for the event string below */
2131 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2132 majpf_args_nr + minpf_args_nr + argc;
2133 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2134
2135 if (rec_argv == NULL)
2136 return -ENOMEM;
2137
2138 j = 0;
2139 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2140 rec_argv[j++] = record_args[i];
2141
2142 if (trace->trace_syscalls) {
2143 for (i = 0; i < sc_args_nr; i++)
2144 rec_argv[j++] = sc_args[i];
2145
2146 /* event string may be different for older kernels - e.g., RHEL6 */
2147 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2148 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2149 else if (is_valid_tracepoint("syscalls:sys_enter"))
2150 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2151 else {
2152 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2153 free(rec_argv);
2154 return -1;
2155 }
2156 }
2157
2158 if (trace->trace_pgfaults & TRACE_PFMAJ)
2159 for (i = 0; i < majpf_args_nr; i++)
2160 rec_argv[j++] = majpf_args[i];
2161
2162 if (trace->trace_pgfaults & TRACE_PFMIN)
2163 for (i = 0; i < minpf_args_nr; i++)
2164 rec_argv[j++] = minpf_args[i];
2165
2166 for (i = 0; i < (unsigned int)argc; i++)
2167 rec_argv[j++] = argv[i];
2168
2169 return cmd_record(j, rec_argv);
2170}
2171
2172static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2173
2174static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
2175{
2176 struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");
2177
2178 if (IS_ERR(evsel))
2179 return false;
2180
2181 if (perf_evsel__field(evsel, "pathname") == NULL) {
2182 perf_evsel__delete(evsel);
2183 return false;
2184 }
2185
2186 evsel->handler = trace__vfs_getname;
2187 perf_evlist__add(evlist, evsel);
2188 return true;
2189}
2190
2191static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
2192{
2193 struct perf_evsel *evsel;
2194 struct perf_event_attr attr = {
2195 .type = PERF_TYPE_SOFTWARE,
2196 .mmap_data = 1,
2197 };
2198
2199 attr.config = config;
2200 attr.sample_period = 1;
2201
2202 event_attr_init(&attr);
2203
2204 evsel = perf_evsel__new(&attr);
2205 if (evsel)
2206 evsel->handler = trace__pgfault;
2207
2208 return evsel;
2209}
2210
2211static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2212{
2213 const u32 type = event->header.type;
2214 struct perf_evsel *evsel;
2215
2216 if (type != PERF_RECORD_SAMPLE) {
2217 trace__process_event(trace, trace->host, event, sample);
2218 return;
2219 }
2220
2221 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2222 if (evsel == NULL) {
2223 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2224 return;
2225 }
2226
2227 trace__set_base_time(trace, evsel, sample);
2228
2229 if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
2230 sample->raw_data == NULL) {
2231 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2232 perf_evsel__name(evsel), sample->tid,
2233 sample->cpu, sample->raw_size);
2234 } else {
2235 tracepoint_handler handler = evsel->handler;
2236 handler(trace, evsel, event, sample);
2237 }
2238}
2239
2240static int trace__add_syscall_newtp(struct trace *trace)
2241{
2242 int ret = -1;
2243 struct perf_evlist *evlist = trace->evlist;
2244 struct perf_evsel *sys_enter, *sys_exit;
2245
2246 sys_enter = perf_evsel__syscall_newtp("sys_enter", trace__sys_enter);
2247 if (sys_enter == NULL)
2248 goto out;
2249
2250 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2251 goto out_delete_sys_enter;
2252
2253 sys_exit = perf_evsel__syscall_newtp("sys_exit", trace__sys_exit);
2254 if (sys_exit == NULL)
2255 goto out_delete_sys_enter;
2256
2257 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2258 goto out_delete_sys_exit;
2259
2260 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2261 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2262
2263 perf_evlist__add(evlist, sys_enter);
2264 perf_evlist__add(evlist, sys_exit);
2265
2266 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2267 /*
2268 * We're interested only in the user space callchain
2269 * leading to the syscall, allow overriding that for
2270 * debugging reasons using --kernel_syscall_callchains
2271 */
2272 sys_exit->attr.exclude_callchain_kernel = 1;
2273 }
2274
2275 trace->syscalls.events.sys_enter = sys_enter;
2276 trace->syscalls.events.sys_exit = sys_exit;
2277
2278 ret = 0;
2279out:
2280 return ret;
2281
2282out_delete_sys_exit:
2283 perf_evsel__delete_priv(sys_exit);
2284out_delete_sys_enter:
2285 perf_evsel__delete_priv(sys_enter);
2286 goto out;
2287}
2288
2289static int trace__set_ev_qualifier_filter(struct trace *trace)
2290{
2291 int err = -1;
2292 struct perf_evsel *sys_exit;
2293 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2294 trace->ev_qualifier_ids.nr,
2295 trace->ev_qualifier_ids.entries);
2296
2297 if (filter == NULL)
2298 goto out_enomem;
2299
2300 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2301 filter)) {
2302 sys_exit = trace->syscalls.events.sys_exit;
2303 err = perf_evsel__append_tp_filter(sys_exit, filter);
2304 }
2305
2306 free(filter);
2307out:
2308 return err;
2309out_enomem:
2310 errno = ENOMEM;
2311 goto out;
2312}
2313
2314static int trace__set_filter_loop_pids(struct trace *trace)
2315{
2316 unsigned int nr = 1;
2317 pid_t pids[32] = {
2318 getpid(),
2319 };
2320 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
2321
2322 while (thread && nr < ARRAY_SIZE(pids)) {
2323 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
2324
2325 if (parent == NULL)
2326 break;
2327
2328 if (!strcmp(thread__comm_str(parent), "sshd")) {
2329 pids[nr++] = parent->tid;
2330 break;
2331 }
2332 thread = parent;
2333 }
2334
2335 return perf_evlist__set_filter_pids(trace->evlist, nr, pids);
2336}
2337
2338static int trace__run(struct trace *trace, int argc, const char **argv)
2339{
2340 struct perf_evlist *evlist = trace->evlist;
2341 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
2342 int err = -1, i;
2343 unsigned long before;
2344 const bool forks = argc > 0;
2345 bool draining = false;
2346
2347 trace->live = true;
2348
2349 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
2350 goto out_error_raw_syscalls;
2351
2352 if (trace->trace_syscalls)
2353 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
2354
2355 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
2356 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
2357 if (pgfault_maj == NULL)
2358 goto out_error_mem;
2359 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
2360 perf_evlist__add(evlist, pgfault_maj);
2361 }
2362
2363 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
2364 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
2365 if (pgfault_min == NULL)
2366 goto out_error_mem;
2367 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
2368 perf_evlist__add(evlist, pgfault_min);
2369 }
2370
2371 if (trace->sched &&
2372 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
2373 trace__sched_stat_runtime))
2374 goto out_error_sched_stat_runtime;
2375
2376 /*
2377 * If a global cgroup was set, apply it to all the events without an
2378 * explicit cgroup. I.e.:
2379 *
2380 * trace -G A -e sched:*switch
2381 *
2382 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
2383 * _and_ sched:sched_switch to the 'A' cgroup, while:
2384 *
2385 * trace -e sched:*switch -G A
2386 *
2387 * will only set the sched:sched_switch event to the 'A' cgroup, all the
2388 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
2389 * a cgroup (on the root cgroup, sys wide, etc).
2390 *
2391 * Multiple cgroups:
2392 *
2393 * trace -G A -e sched:*switch -G B
2394 *
2395 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
2396 * to the 'B' cgroup.
2397 *
2398 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
2399 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
2400 */
2401 if (trace->cgroup)
2402 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
2403
2404 err = perf_evlist__create_maps(evlist, &trace->opts.target);
2405 if (err < 0) {
2406 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
2407 goto out_delete_evlist;
2408 }
2409
2410 err = trace__symbols_init(trace, evlist);
2411 if (err < 0) {
2412 fprintf(trace->output, "Problems initializing symbol libraries!\n");
2413 goto out_delete_evlist;
2414 }
2415
2416 perf_evlist__config(evlist, &trace->opts, &callchain_param);
2417
2418 signal(SIGCHLD, sig_handler);
2419 signal(SIGINT, sig_handler);
2420
2421 if (forks) {
2422 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
2423 argv, false, NULL);
2424 if (err < 0) {
2425 fprintf(trace->output, "Couldn't run the workload!\n");
2426 goto out_delete_evlist;
2427 }
2428 }
2429
2430 err = perf_evlist__open(evlist);
2431 if (err < 0)
2432 goto out_error_open;
2433
2434 err = bpf__apply_obj_config();
2435 if (err) {
2436 char errbuf[BUFSIZ];
2437
2438 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
2439 pr_err("ERROR: Apply config to BPF failed: %s\n",
2440 errbuf);
2441 goto out_error_open;
2442 }
2443
2444 /*
2445 * Better not use !target__has_task() here because we need to cover the
2446 * case where no threads were specified in the command line, but a
2447 * workload was, and in that case we will fill in the thread_map when
2448 * we fork the workload in perf_evlist__prepare_workload.
2449 */
2450 if (trace->filter_pids.nr > 0)
2451 err = perf_evlist__set_filter_pids(evlist, trace->filter_pids.nr, trace->filter_pids.entries);
2452 else if (thread_map__pid(evlist->threads, 0) == -1)
2453 err = trace__set_filter_loop_pids(trace);
2454
2455 if (err < 0)
2456 goto out_error_mem;
2457
2458 if (trace->ev_qualifier_ids.nr > 0) {
2459 err = trace__set_ev_qualifier_filter(trace);
2460 if (err < 0)
2461 goto out_errno;
2462
2463 pr_debug("event qualifier tracepoint filter: %s\n",
2464 trace->syscalls.events.sys_exit->filter);
2465 }
2466
2467 err = perf_evlist__apply_filters(evlist, &evsel);
2468 if (err < 0)
2469 goto out_error_apply_filters;
2470
2471 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
2472 if (err < 0)
2473 goto out_error_mmap;
2474
2475 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
2476 perf_evlist__enable(evlist);
2477
2478 if (forks)
2479 perf_evlist__start_workload(evlist);
2480
2481 if (trace->opts.initial_delay) {
2482 usleep(trace->opts.initial_delay * 1000);
2483 perf_evlist__enable(evlist);
2484 }
2485
2486 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
2487 evlist->threads->nr > 1 ||
2488 perf_evlist__first(evlist)->attr.inherit;
2489
2490 /*
2491 * Now that we already used evsel->attr to ask the kernel to setup the
2492 * events, lets reuse evsel->attr.sample_max_stack as the limit in
2493 * trace__resolve_callchain(), allowing per-event max-stack settings
2494 * to override an explicitely set --max-stack global setting.
2495 */
2496 evlist__for_each_entry(evlist, evsel) {
2497 if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) &&
2498 evsel->attr.sample_max_stack == 0)
2499 evsel->attr.sample_max_stack = trace->max_stack;
2500 }
2501again:
2502 before = trace->nr_events;
2503
2504 for (i = 0; i < evlist->nr_mmaps; i++) {
2505 union perf_event *event;
2506 struct perf_mmap *md;
2507
2508 md = &evlist->mmap[i];
2509 if (perf_mmap__read_init(md) < 0)
2510 continue;
2511
2512 while ((event = perf_mmap__read_event(md)) != NULL) {
2513 struct perf_sample sample;
2514
2515 ++trace->nr_events;
2516
2517 err = perf_evlist__parse_sample(evlist, event, &sample);
2518 if (err) {
2519 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
2520 goto next_event;
2521 }
2522
2523 trace__handle_event(trace, event, &sample);
2524next_event:
2525 perf_mmap__consume(md);
2526
2527 if (interrupted)
2528 goto out_disable;
2529
2530 if (done && !draining) {
2531 perf_evlist__disable(evlist);
2532 draining = true;
2533 }
2534 }
2535 perf_mmap__read_done(md);
2536 }
2537
2538 if (trace->nr_events == before) {
2539 int timeout = done ? 100 : -1;
2540
2541 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
2542 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP) == 0)
2543 draining = true;
2544
2545 goto again;
2546 }
2547 } else {
2548 goto again;
2549 }
2550
2551out_disable:
2552 thread__zput(trace->current);
2553
2554 perf_evlist__disable(evlist);
2555
2556 if (!err) {
2557 if (trace->summary)
2558 trace__fprintf_thread_summary(trace, trace->output);
2559
2560 if (trace->show_tool_stats) {
2561 fprintf(trace->output, "Stats:\n "
2562 " vfs_getname : %" PRIu64 "\n"
2563 " proc_getname: %" PRIu64 "\n",
2564 trace->stats.vfs_getname,
2565 trace->stats.proc_getname);
2566 }
2567 }
2568
2569out_delete_evlist:
2570 trace__symbols__exit(trace);
2571
2572 perf_evlist__delete(evlist);
2573 cgroup__put(trace->cgroup);
2574 trace->evlist = NULL;
2575 trace->live = false;
2576 return err;
2577{
2578 char errbuf[BUFSIZ];
2579
2580out_error_sched_stat_runtime:
2581 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
2582 goto out_error;
2583
2584out_error_raw_syscalls:
2585 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
2586 goto out_error;
2587
2588out_error_mmap:
2589 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
2590 goto out_error;
2591
2592out_error_open:
2593 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
2594
2595out_error:
2596 fprintf(trace->output, "%s\n", errbuf);
2597 goto out_delete_evlist;
2598
2599out_error_apply_filters:
2600 fprintf(trace->output,
2601 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
2602 evsel->filter, perf_evsel__name(evsel), errno,
2603 str_error_r(errno, errbuf, sizeof(errbuf)));
2604 goto out_delete_evlist;
2605}
2606out_error_mem:
2607 fprintf(trace->output, "Not enough memory to run!\n");
2608 goto out_delete_evlist;
2609
2610out_errno:
2611 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
2612 goto out_delete_evlist;
2613}
2614
2615static int trace__replay(struct trace *trace)
2616{
2617 const struct perf_evsel_str_handler handlers[] = {
2618 { "probe:vfs_getname", trace__vfs_getname, },
2619 };
2620 struct perf_data data = {
2621 .file = {
2622 .path = input_name,
2623 },
2624 .mode = PERF_DATA_MODE_READ,
2625 .force = trace->force,
2626 };
2627 struct perf_session *session;
2628 struct perf_evsel *evsel;
2629 int err = -1;
2630
2631 trace->tool.sample = trace__process_sample;
2632 trace->tool.mmap = perf_event__process_mmap;
2633 trace->tool.mmap2 = perf_event__process_mmap2;
2634 trace->tool.comm = perf_event__process_comm;
2635 trace->tool.exit = perf_event__process_exit;
2636 trace->tool.fork = perf_event__process_fork;
2637 trace->tool.attr = perf_event__process_attr;
2638 trace->tool.tracing_data = perf_event__process_tracing_data;
2639 trace->tool.build_id = perf_event__process_build_id;
2640 trace->tool.namespaces = perf_event__process_namespaces;
2641
2642 trace->tool.ordered_events = true;
2643 trace->tool.ordering_requires_timestamps = true;
2644
2645 /* add tid to output */
2646 trace->multiple_threads = true;
2647
2648 session = perf_session__new(&data, false, &trace->tool);
2649 if (session == NULL)
2650 return -1;
2651
2652 if (trace->opts.target.pid)
2653 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
2654
2655 if (trace->opts.target.tid)
2656 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
2657
2658 if (symbol__init(&session->header.env) < 0)
2659 goto out;
2660
2661 trace->host = &session->machines.host;
2662
2663 err = perf_session__set_tracepoints_handlers(session, handlers);
2664 if (err)
2665 goto out;
2666
2667 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2668 "raw_syscalls:sys_enter");
2669 /* older kernels have syscalls tp versus raw_syscalls */
2670 if (evsel == NULL)
2671 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2672 "syscalls:sys_enter");
2673
2674 if (evsel &&
2675 (perf_evsel__init_syscall_tp(evsel, trace__sys_enter) < 0 ||
2676 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
2677 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
2678 goto out;
2679 }
2680
2681 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2682 "raw_syscalls:sys_exit");
2683 if (evsel == NULL)
2684 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2685 "syscalls:sys_exit");
2686 if (evsel &&
2687 (perf_evsel__init_syscall_tp(evsel, trace__sys_exit) < 0 ||
2688 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
2689 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
2690 goto out;
2691 }
2692
2693 evlist__for_each_entry(session->evlist, evsel) {
2694 if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
2695 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
2696 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
2697 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
2698 evsel->handler = trace__pgfault;
2699 }
2700
2701 setup_pager();
2702
2703 err = perf_session__process_events(session);
2704 if (err)
2705 pr_err("Failed to process events, error %d", err);
2706
2707 else if (trace->summary)
2708 trace__fprintf_thread_summary(trace, trace->output);
2709
2710out:
2711 perf_session__delete(session);
2712
2713 return err;
2714}
2715
2716static size_t trace__fprintf_threads_header(FILE *fp)
2717{
2718 size_t printed;
2719
2720 printed = fprintf(fp, "\n Summary of events:\n\n");
2721
2722 return printed;
2723}
2724
2725DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
2726 struct stats *stats;
2727 double msecs;
2728 int syscall;
2729)
2730{
2731 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
2732 struct stats *stats = source->priv;
2733
2734 entry->syscall = source->i;
2735 entry->stats = stats;
2736 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
2737}
2738
2739static size_t thread__dump_stats(struct thread_trace *ttrace,
2740 struct trace *trace, FILE *fp)
2741{
2742 size_t printed = 0;
2743 struct syscall *sc;
2744 struct rb_node *nd;
2745 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
2746
2747 if (syscall_stats == NULL)
2748 return 0;
2749
2750 printed += fprintf(fp, "\n");
2751
2752 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
2753 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
2754 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
2755
2756 resort_rb__for_each_entry(nd, syscall_stats) {
2757 struct stats *stats = syscall_stats_entry->stats;
2758 if (stats) {
2759 double min = (double)(stats->min) / NSEC_PER_MSEC;
2760 double max = (double)(stats->max) / NSEC_PER_MSEC;
2761 double avg = avg_stats(stats);
2762 double pct;
2763 u64 n = (u64) stats->n;
2764
2765 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
2766 avg /= NSEC_PER_MSEC;
2767
2768 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
2769 printed += fprintf(fp, " %-15s", sc->name);
2770 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
2771 n, syscall_stats_entry->msecs, min, avg);
2772 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
2773 }
2774 }
2775
2776 resort_rb__delete(syscall_stats);
2777 printed += fprintf(fp, "\n\n");
2778
2779 return printed;
2780}
2781
2782static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
2783{
2784 size_t printed = 0;
2785 struct thread_trace *ttrace = thread__priv(thread);
2786 double ratio;
2787
2788 if (ttrace == NULL)
2789 return 0;
2790
2791 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
2792
2793 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
2794 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
2795 printed += fprintf(fp, "%.1f%%", ratio);
2796 if (ttrace->pfmaj)
2797 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
2798 if (ttrace->pfmin)
2799 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
2800 if (trace->sched)
2801 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
2802 else if (fputc('\n', fp) != EOF)
2803 ++printed;
2804
2805 printed += thread__dump_stats(ttrace, trace, fp);
2806
2807 return printed;
2808}
2809
2810static unsigned long thread__nr_events(struct thread_trace *ttrace)
2811{
2812 return ttrace ? ttrace->nr_events : 0;
2813}
2814
2815DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
2816 struct thread *thread;
2817)
2818{
2819 entry->thread = rb_entry(nd, struct thread, rb_node);
2820}
2821
2822static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
2823{
2824 size_t printed = trace__fprintf_threads_header(fp);
2825 struct rb_node *nd;
2826 int i;
2827
2828 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
2829 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
2830
2831 if (threads == NULL) {
2832 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
2833 return 0;
2834 }
2835
2836 resort_rb__for_each_entry(nd, threads)
2837 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
2838
2839 resort_rb__delete(threads);
2840 }
2841 return printed;
2842}
2843
2844static int trace__set_duration(const struct option *opt, const char *str,
2845 int unset __maybe_unused)
2846{
2847 struct trace *trace = opt->value;
2848
2849 trace->duration_filter = atof(str);
2850 return 0;
2851}
2852
2853static int trace__set_filter_pids(const struct option *opt, const char *str,
2854 int unset __maybe_unused)
2855{
2856 int ret = -1;
2857 size_t i;
2858 struct trace *trace = opt->value;
2859 /*
2860 * FIXME: introduce a intarray class, plain parse csv and create a
2861 * { int nr, int entries[] } struct...
2862 */
2863 struct intlist *list = intlist__new(str);
2864
2865 if (list == NULL)
2866 return -1;
2867
2868 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
2869 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
2870
2871 if (trace->filter_pids.entries == NULL)
2872 goto out;
2873
2874 trace->filter_pids.entries[0] = getpid();
2875
2876 for (i = 1; i < trace->filter_pids.nr; ++i)
2877 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
2878
2879 intlist__delete(list);
2880 ret = 0;
2881out:
2882 return ret;
2883}
2884
2885static int trace__open_output(struct trace *trace, const char *filename)
2886{
2887 struct stat st;
2888
2889 if (!stat(filename, &st) && st.st_size) {
2890 char oldname[PATH_MAX];
2891
2892 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
2893 unlink(oldname);
2894 rename(filename, oldname);
2895 }
2896
2897 trace->output = fopen(filename, "w");
2898
2899 return trace->output == NULL ? -errno : 0;
2900}
2901
2902static int parse_pagefaults(const struct option *opt, const char *str,
2903 int unset __maybe_unused)
2904{
2905 int *trace_pgfaults = opt->value;
2906
2907 if (strcmp(str, "all") == 0)
2908 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
2909 else if (strcmp(str, "maj") == 0)
2910 *trace_pgfaults |= TRACE_PFMAJ;
2911 else if (strcmp(str, "min") == 0)
2912 *trace_pgfaults |= TRACE_PFMIN;
2913 else
2914 return -1;
2915
2916 return 0;
2917}
2918
2919static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
2920{
2921 struct perf_evsel *evsel;
2922
2923 evlist__for_each_entry(evlist, evsel)
2924 evsel->handler = handler;
2925}
2926
2927/*
2928 * XXX: Hackish, just splitting the combined -e+--event (syscalls
2929 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
2930 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
2931 *
2932 * It'd be better to introduce a parse_options() variant that would return a
2933 * list with the terms it didn't match to an event...
2934 */
2935static int trace__parse_events_option(const struct option *opt, const char *str,
2936 int unset __maybe_unused)
2937{
2938 struct trace *trace = (struct trace *)opt->value;
2939 const char *s = str;
2940 char *sep = NULL, *lists[2] = { NULL, NULL, };
2941 int len = strlen(str) + 1, err = -1, list, idx;
2942 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
2943 char group_name[PATH_MAX];
2944
2945 if (strace_groups_dir == NULL)
2946 return -1;
2947
2948 if (*s == '!') {
2949 ++s;
2950 trace->not_ev_qualifier = true;
2951 }
2952
2953 while (1) {
2954 if ((sep = strchr(s, ',')) != NULL)
2955 *sep = '\0';
2956
2957 list = 0;
2958 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
2959 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
2960 list = 1;
2961 } else {
2962 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
2963 if (access(group_name, R_OK) == 0)
2964 list = 1;
2965 }
2966
2967 if (lists[list]) {
2968 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
2969 } else {
2970 lists[list] = malloc(len);
2971 if (lists[list] == NULL)
2972 goto out;
2973 strcpy(lists[list], s);
2974 }
2975
2976 if (!sep)
2977 break;
2978
2979 *sep = ',';
2980 s = sep + 1;
2981 }
2982
2983 if (lists[1] != NULL) {
2984 struct strlist_config slist_config = {
2985 .dirname = strace_groups_dir,
2986 };
2987
2988 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
2989 if (trace->ev_qualifier == NULL) {
2990 fputs("Not enough memory to parse event qualifier", trace->output);
2991 goto out;
2992 }
2993
2994 if (trace__validate_ev_qualifier(trace))
2995 goto out;
2996 }
2997
2998 err = 0;
2999
3000 if (lists[0]) {
3001 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3002 "event selector. use 'perf list' to list available events",
3003 parse_events_option);
3004 err = parse_events_option(&o, lists[0], 0);
3005 }
3006out:
3007 if (sep)
3008 *sep = ',';
3009
3010 return err;
3011}
3012
3013static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3014{
3015 struct trace *trace = opt->value;
3016
3017 if (!list_empty(&trace->evlist->entries))
3018 return parse_cgroups(opt, str, unset);
3019
3020 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
3021
3022 return 0;
3023}
3024
3025int cmd_trace(int argc, const char **argv)
3026{
3027 const char *trace_usage[] = {
3028 "perf trace [<options>] [<command>]",
3029 "perf trace [<options>] -- <command> [<options>]",
3030 "perf trace record [<options>] [<command>]",
3031 "perf trace record [<options>] -- <command> [<options>]",
3032 NULL
3033 };
3034 struct trace trace = {
3035 .syscalls = {
3036 . max = -1,
3037 },
3038 .opts = {
3039 .target = {
3040 .uid = UINT_MAX,
3041 .uses_mmap = true,
3042 },
3043 .user_freq = UINT_MAX,
3044 .user_interval = ULLONG_MAX,
3045 .no_buffering = true,
3046 .mmap_pages = UINT_MAX,
3047 .proc_map_timeout = 500,
3048 },
3049 .output = stderr,
3050 .show_comm = true,
3051 .trace_syscalls = true,
3052 .kernel_syscallchains = false,
3053 .max_stack = UINT_MAX,
3054 };
3055 const char *output_name = NULL;
3056 const struct option trace_options[] = {
3057 OPT_CALLBACK('e', "event", &trace, "event",
3058 "event/syscall selector. use 'perf list' to list available events",
3059 trace__parse_events_option),
3060 OPT_BOOLEAN(0, "comm", &trace.show_comm,
3061 "show the thread COMM next to its id"),
3062 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
3063 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
3064 trace__parse_events_option),
3065 OPT_STRING('o', "output", &output_name, "file", "output file name"),
3066 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
3067 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
3068 "trace events on existing process id"),
3069 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
3070 "trace events on existing thread id"),
3071 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
3072 "pids to filter (by the kernel)", trace__set_filter_pids),
3073 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
3074 "system-wide collection from all CPUs"),
3075 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
3076 "list of cpus to monitor"),
3077 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
3078 "child tasks do not inherit counters"),
3079 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
3080 "number of mmap data pages",
3081 perf_evlist__parse_mmap_pages),
3082 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
3083 "user to profile"),
3084 OPT_CALLBACK(0, "duration", &trace, "float",
3085 "show only events with duration > N.M ms",
3086 trace__set_duration),
3087 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
3088 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
3089 OPT_BOOLEAN('T', "time", &trace.full_time,
3090 "Show full timestamp, not time relative to first start"),
3091 OPT_BOOLEAN(0, "failure", &trace.failure_only,
3092 "Show only syscalls that failed"),
3093 OPT_BOOLEAN('s', "summary", &trace.summary_only,
3094 "Show only syscall summary with statistics"),
3095 OPT_BOOLEAN('S', "with-summary", &trace.summary,
3096 "Show all syscalls and summary with statistics"),
3097 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
3098 "Trace pagefaults", parse_pagefaults, "maj"),
3099 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
3100 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
3101 OPT_CALLBACK(0, "call-graph", &trace.opts,
3102 "record_mode[,record_size]", record_callchain_help,
3103 &record_parse_callchain_opt),
3104 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
3105 "Show the kernel callchains on the syscall exit path"),
3106 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
3107 "Set the minimum stack depth when parsing the callchain, "
3108 "anything below the specified depth will be ignored."),
3109 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
3110 "Set the maximum stack depth when parsing the callchain, "
3111 "anything beyond the specified depth will be ignored. "
3112 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
3113 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
3114 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
3115 OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
3116 "per thread proc mmap processing timeout in ms"),
3117 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
3118 trace__parse_cgroups),
3119 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
3120 "ms to wait before starting measurement after program "
3121 "start"),
3122 OPT_END()
3123 };
3124 bool __maybe_unused max_stack_user_set = true;
3125 bool mmap_pages_user_set = true;
3126 const char * const trace_subcommands[] = { "record", NULL };
3127 int err;
3128 char bf[BUFSIZ];
3129
3130 signal(SIGSEGV, sighandler_dump_stack);
3131 signal(SIGFPE, sighandler_dump_stack);
3132
3133 trace.evlist = perf_evlist__new();
3134 trace.sctbl = syscalltbl__new();
3135
3136 if (trace.evlist == NULL || trace.sctbl == NULL) {
3137 pr_err("Not enough memory to run!\n");
3138 err = -ENOMEM;
3139 goto out;
3140 }
3141
3142 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
3143 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
3144
3145 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
3146 usage_with_options_msg(trace_usage, trace_options,
3147 "cgroup monitoring only available in system-wide mode");
3148 }
3149
3150 err = bpf__setup_stdout(trace.evlist);
3151 if (err) {
3152 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
3153 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
3154 goto out;
3155 }
3156
3157 err = -1;
3158
3159 if (trace.trace_pgfaults) {
3160 trace.opts.sample_address = true;
3161 trace.opts.sample_time = true;
3162 }
3163
3164 if (trace.opts.mmap_pages == UINT_MAX)
3165 mmap_pages_user_set = false;
3166
3167 if (trace.max_stack == UINT_MAX) {
3168 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl_perf_event_max_stack;
3169 max_stack_user_set = false;
3170 }
3171
3172#ifdef HAVE_DWARF_UNWIND_SUPPORT
3173 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
3174 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
3175 }
3176#endif
3177
3178 if (callchain_param.enabled) {
3179 if (!mmap_pages_user_set && geteuid() == 0)
3180 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
3181
3182 symbol_conf.use_callchain = true;
3183 }
3184
3185 if (trace.evlist->nr_entries > 0)
3186 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
3187
3188 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
3189 return trace__record(&trace, argc-1, &argv[1]);
3190
3191 /* summary_only implies summary option, but don't overwrite summary if set */
3192 if (trace.summary_only)
3193 trace.summary = trace.summary_only;
3194
3195 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
3196 trace.evlist->nr_entries == 0 /* Was --events used? */) {
3197 pr_err("Please specify something to trace.\n");
3198 return -1;
3199 }
3200
3201 if (!trace.trace_syscalls && trace.ev_qualifier) {
3202 pr_err("The -e option can't be used with --no-syscalls.\n");
3203 goto out;
3204 }
3205
3206 if (output_name != NULL) {
3207 err = trace__open_output(&trace, output_name);
3208 if (err < 0) {
3209 perror("failed to create output file");
3210 goto out;
3211 }
3212 }
3213
3214 trace.open_id = syscalltbl__id(trace.sctbl, "open");
3215
3216 err = target__validate(&trace.opts.target);
3217 if (err) {
3218 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
3219 fprintf(trace.output, "%s", bf);
3220 goto out_close;
3221 }
3222
3223 err = target__parse_uid(&trace.opts.target);
3224 if (err) {
3225 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
3226 fprintf(trace.output, "%s", bf);
3227 goto out_close;
3228 }
3229
3230 if (!argc && target__none(&trace.opts.target))
3231 trace.opts.target.system_wide = true;
3232
3233 if (input_name)
3234 err = trace__replay(&trace);
3235 else
3236 err = trace__run(&trace, argc, argv);
3237
3238out_close:
3239 if (output_name != NULL)
3240 fclose(trace.output);
3241out:
3242 return err;
3243}