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