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KVM: PPC: Book3S HV: Flush link stack on guest exit to host kernel
[linux/fpc-iii.git] / tools / perf / builtin-trace.c
blobbb5130d0215549fb3eb2266cfea2ce742a0510d2
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
81 #ifndef O_CLOEXEC
82 # define O_CLOEXEC 02000000
83 #endif
84
85 #ifndef F_LINUX_SPECIFIC_BASE
86 # define F_LINUX_SPECIFIC_BASE 1024
87 #endif
88
89 struct trace {
90 struct perf_tool tool;
91 struct syscalltbl *sctbl;
92 struct {
93 struct syscall *table;
94 struct bpf_map *map;
95 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
96 struct bpf_map *sys_enter,
97 *sys_exit;
98 } prog_array;
99 struct {
100 struct evsel *sys_enter,
101 *sys_exit,
102 *augmented;
103 } events;
104 struct bpf_program *unaugmented_prog;
105 } syscalls;
106 struct {
107 struct bpf_map *map;
108 } dump;
109 struct record_opts opts;
110 struct evlist *evlist;
111 struct machine *host;
112 struct thread *current;
113 struct bpf_object *bpf_obj;
114 struct cgroup *cgroup;
115 u64 base_time;
116 FILE *output;
117 unsigned long nr_events;
118 unsigned long nr_events_printed;
119 unsigned long max_events;
120 struct evswitch evswitch;
121 struct strlist *ev_qualifier;
122 struct {
123 size_t nr;
124 int *entries;
125 } ev_qualifier_ids;
126 struct {
127 size_t nr;
128 pid_t *entries;
129 struct bpf_map *map;
130 } filter_pids;
131 double duration_filter;
132 double runtime_ms;
133 struct {
134 u64 vfs_getname,
135 proc_getname;
136 } stats;
137 unsigned int max_stack;
138 unsigned int min_stack;
139 int raw_augmented_syscalls_args_size;
140 bool raw_augmented_syscalls;
141 bool fd_path_disabled;
142 bool sort_events;
143 bool not_ev_qualifier;
144 bool live;
145 bool full_time;
146 bool sched;
147 bool multiple_threads;
148 bool summary;
149 bool summary_only;
150 bool failure_only;
151 bool show_comm;
152 bool print_sample;
153 bool show_tool_stats;
154 bool trace_syscalls;
155 bool kernel_syscallchains;
156 s16 args_alignment;
157 bool show_tstamp;
158 bool show_duration;
159 bool show_zeros;
160 bool show_arg_names;
161 bool show_string_prefix;
162 bool force;
163 bool vfs_getname;
164 int trace_pgfaults;
165 struct {
166 struct ordered_events data;
167 u64 last;
168 } oe;
169 };
170
171 struct tp_field {
172 int offset;
173 union {
174 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
175 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
176 };
177 };
178
179 #define TP_UINT_FIELD(bits) \
180 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
181 { \
182 u##bits value; \
183 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
184 return value; \
185 }
186
187 TP_UINT_FIELD(8);
188 TP_UINT_FIELD(16);
189 TP_UINT_FIELD(32);
190 TP_UINT_FIELD(64);
191
192 #define TP_UINT_FIELD__SWAPPED(bits) \
193 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
194 { \
195 u##bits value; \
196 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
197 return bswap_##bits(value);\
198 }
199
200 TP_UINT_FIELD__SWAPPED(16);
201 TP_UINT_FIELD__SWAPPED(32);
202 TP_UINT_FIELD__SWAPPED(64);
203
204 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
205 {
206 field->offset = offset;
207
208 switch (size) {
209 case 1:
210 field->integer = tp_field__u8;
211 break;
212 case 2:
213 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
214 break;
215 case 4:
216 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
217 break;
218 case 8:
219 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
220 break;
221 default:
222 return -1;
223 }
224
225 return 0;
226 }
227
228 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
229 {
230 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
231 }
232
233 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
234 {
235 return sample->raw_data + field->offset;
236 }
237
238 static int __tp_field__init_ptr(struct tp_field *field, int offset)
239 {
240 field->offset = offset;
241 field->pointer = tp_field__ptr;
242 return 0;
243 }
244
245 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
246 {
247 return __tp_field__init_ptr(field, format_field->offset);
248 }
249
250 struct syscall_tp {
251 struct tp_field id;
252 union {
253 struct tp_field args, ret;
254 };
255 };
256
257 static int perf_evsel__init_tp_uint_field(struct evsel *evsel,
258 struct tp_field *field,
259 const char *name)
260 {
261 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
262
263 if (format_field == NULL)
264 return -1;
265
266 return tp_field__init_uint(field, format_field, evsel->needs_swap);
267 }
268
269 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
270 ({ struct syscall_tp *sc = evsel->priv;\
271 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
272
273 static int perf_evsel__init_tp_ptr_field(struct evsel *evsel,
274 struct tp_field *field,
275 const char *name)
276 {
277 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
278
279 if (format_field == NULL)
280 return -1;
281
282 return tp_field__init_ptr(field, format_field);
283 }
284
285 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
286 ({ struct syscall_tp *sc = evsel->priv;\
287 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
288
289 static void evsel__delete_priv(struct evsel *evsel)
290 {
291 zfree(&evsel->priv);
292 evsel__delete(evsel);
293 }
294
295 static int perf_evsel__init_syscall_tp(struct evsel *evsel)
296 {
297 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
298
299 if (evsel->priv != NULL) {
300 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
301 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
302 goto out_delete;
303 return 0;
304 }
305
306 return -ENOMEM;
307 out_delete:
308 zfree(&evsel->priv);
309 return -ENOENT;
310 }
311
312 static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
313 {
314 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
315
316 if (evsel->priv != NULL) {
317 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
318 if (syscall_id == NULL)
319 syscall_id = perf_evsel__field(tp, "__syscall_nr");
320 if (syscall_id == NULL)
321 goto out_delete;
322 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
323 goto out_delete;
324
325 return 0;
326 }
327
328 return -ENOMEM;
329 out_delete:
330 zfree(&evsel->priv);
331 return -EINVAL;
332 }
333
334 static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
335 {
336 struct syscall_tp *sc = evsel->priv;
337
338 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
339 }
340
341 static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
342 {
343 struct syscall_tp *sc = evsel->priv;
344
345 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
346 }
347
348 static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
349 {
350 evsel->priv = malloc(sizeof(struct syscall_tp));
351 if (evsel->priv != NULL) {
352 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
353 goto out_delete;
354
355 evsel->handler = handler;
356 return 0;
357 }
358
359 return -ENOMEM;
360
361 out_delete:
362 zfree(&evsel->priv);
363 return -ENOENT;
364 }
365
366 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
367 {
368 struct evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
369
370 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
371 if (IS_ERR(evsel))
372 evsel = perf_evsel__newtp("syscalls", direction);
373
374 if (IS_ERR(evsel))
375 return NULL;
376
377 if (perf_evsel__init_raw_syscall_tp(evsel, handler))
378 goto out_delete;
379
380 return evsel;
381
382 out_delete:
383 evsel__delete_priv(evsel);
384 return NULL;
385 }
386
387 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
388 ({ struct syscall_tp *fields = evsel->priv; \
389 fields->name.integer(&fields->name, sample); })
390
391 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
392 ({ struct syscall_tp *fields = evsel->priv; \
393 fields->name.pointer(&fields->name, sample); })
394
395 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
396 {
397 int idx = val - sa->offset;
398
399 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
400 size_t printed = scnprintf(bf, size, intfmt, val);
401 if (show_prefix)
402 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
403 return printed;
404 }
405
406 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
407 }
408
409 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
410 const char *intfmt,
411 struct syscall_arg *arg)
412 {
413 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
414 }
415
416 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
417 struct syscall_arg *arg)
418 {
419 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
420 }
421
422 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
423
424 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
425 {
426 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
427 }
428
429 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
430 {
431 size_t printed;
432 int i;
433
434 for (i = 0; i < sas->nr_entries; ++i) {
435 struct strarray *sa = sas->entries[i];
436 int idx = val - sa->offset;
437
438 if (idx >= 0 && idx < sa->nr_entries) {
439 if (sa->entries[idx] == NULL)
440 break;
441 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
442 }
443 }
444
445 printed = scnprintf(bf, size, intfmt, val);
446 if (show_prefix)
447 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
448 return printed;
449 }
450
451 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
452 struct syscall_arg *arg)
453 {
454 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
455 }
456
457 #ifndef AT_FDCWD
458 #define AT_FDCWD -100
459 #endif
460
461 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
462 struct syscall_arg *arg)
463 {
464 int fd = arg->val;
465 const char *prefix = "AT_FD";
466
467 if (fd == AT_FDCWD)
468 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
469
470 return syscall_arg__scnprintf_fd(bf, size, arg);
471 }
472
473 #define SCA_FDAT syscall_arg__scnprintf_fd_at
474
475 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
476 struct syscall_arg *arg);
477
478 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
479
480 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
481 {
482 return scnprintf(bf, size, "%#lx", arg->val);
483 }
484
485 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
486 {
487 if (arg->val == 0)
488 return scnprintf(bf, size, "NULL");
489 return syscall_arg__scnprintf_hex(bf, size, arg);
490 }
491
492 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
493 {
494 return scnprintf(bf, size, "%d", arg->val);
495 }
496
497 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
498 {
499 return scnprintf(bf, size, "%ld", arg->val);
500 }
501
502 static const char *bpf_cmd[] = {
503 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
504 "MAP_GET_NEXT_KEY", "PROG_LOAD",
505 };
506 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
507
508 static const char *fsmount_flags[] = {
509 [1] = "CLOEXEC",
510 };
511 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
512
513 #include "trace/beauty/generated/fsconfig_arrays.c"
514
515 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
516
517 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
518 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
519
520 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
521 static DEFINE_STRARRAY(itimers, "ITIMER_");
522
523 static const char *keyctl_options[] = {
524 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
525 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
526 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
527 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
528 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
529 };
530 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
531
532 static const char *whences[] = { "SET", "CUR", "END",
533 #ifdef SEEK_DATA
534 "DATA",
535 #endif
536 #ifdef SEEK_HOLE
537 "HOLE",
538 #endif
539 };
540 static DEFINE_STRARRAY(whences, "SEEK_");
541
542 static const char *fcntl_cmds[] = {
543 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
544 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
545 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
546 "GETOWNER_UIDS",
547 };
548 static DEFINE_STRARRAY(fcntl_cmds, "F_");
549
550 static const char *fcntl_linux_specific_cmds[] = {
551 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
552 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
553 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
554 };
555
556 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
557
558 static struct strarray *fcntl_cmds_arrays[] = {
559 &strarray__fcntl_cmds,
560 &strarray__fcntl_linux_specific_cmds,
561 };
562
563 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
564
565 static const char *rlimit_resources[] = {
566 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
567 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
568 "RTTIME",
569 };
570 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
571
572 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
573 static DEFINE_STRARRAY(sighow, "SIG_");
574
575 static const char *clockid[] = {
576 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
577 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
578 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
579 };
580 static DEFINE_STRARRAY(clockid, "CLOCK_");
581
582 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
583 struct syscall_arg *arg)
584 {
585 bool show_prefix = arg->show_string_prefix;
586 const char *suffix = "_OK";
587 size_t printed = 0;
588 int mode = arg->val;
589
590 if (mode == F_OK) /* 0 */
591 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
592 #define P_MODE(n) \
593 if (mode & n##_OK) { \
594 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
595 mode &= ~n##_OK; \
596 }
597
598 P_MODE(R);
599 P_MODE(W);
600 P_MODE(X);
601 #undef P_MODE
602
603 if (mode)
604 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
605
606 return printed;
607 }
608
609 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
610
611 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
612 struct syscall_arg *arg);
613
614 #define SCA_FILENAME syscall_arg__scnprintf_filename
615
616 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
617 struct syscall_arg *arg)
618 {
619 bool show_prefix = arg->show_string_prefix;
620 const char *prefix = "O_";
621 int printed = 0, flags = arg->val;
622
623 #define P_FLAG(n) \
624 if (flags & O_##n) { \
625 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
626 flags &= ~O_##n; \
627 }
628
629 P_FLAG(CLOEXEC);
630 P_FLAG(NONBLOCK);
631 #undef P_FLAG
632
633 if (flags)
634 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
635
636 return printed;
637 }
638
639 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
640
641 #ifndef GRND_NONBLOCK
642 #define GRND_NONBLOCK 0x0001
643 #endif
644 #ifndef GRND_RANDOM
645 #define GRND_RANDOM 0x0002
646 #endif
647
648 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
649 struct syscall_arg *arg)
650 {
651 bool show_prefix = arg->show_string_prefix;
652 const char *prefix = "GRND_";
653 int printed = 0, flags = arg->val;
654
655 #define P_FLAG(n) \
656 if (flags & GRND_##n) { \
657 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
658 flags &= ~GRND_##n; \
659 }
660
661 P_FLAG(RANDOM);
662 P_FLAG(NONBLOCK);
663 #undef P_FLAG
664
665 if (flags)
666 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
667
668 return printed;
669 }
670
671 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
672
673 #define STRARRAY(name, array) \
674 { .scnprintf = SCA_STRARRAY, \
675 .parm = &strarray__##array, }
676
677 #define STRARRAY_FLAGS(name, array) \
678 { .scnprintf = SCA_STRARRAY_FLAGS, \
679 .parm = &strarray__##array, }
680
681 #include "trace/beauty/arch_errno_names.c"
682 #include "trace/beauty/eventfd.c"
683 #include "trace/beauty/futex_op.c"
684 #include "trace/beauty/futex_val3.c"
685 #include "trace/beauty/mmap.c"
686 #include "trace/beauty/mode_t.c"
687 #include "trace/beauty/msg_flags.c"
688 #include "trace/beauty/open_flags.c"
689 #include "trace/beauty/perf_event_open.c"
690 #include "trace/beauty/pid.c"
691 #include "trace/beauty/sched_policy.c"
692 #include "trace/beauty/seccomp.c"
693 #include "trace/beauty/signum.c"
694 #include "trace/beauty/socket_type.c"
695 #include "trace/beauty/waitid_options.c"
696
697 struct syscall_arg_fmt {
698 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
699 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
700 void *parm;
701 const char *name;
702 bool show_zero;
703 };
704
705 static struct syscall_fmt {
706 const char *name;
707 const char *alias;
708 struct {
709 const char *sys_enter,
710 *sys_exit;
711 } bpf_prog_name;
712 struct syscall_arg_fmt arg[6];
713 u8 nr_args;
714 bool errpid;
715 bool timeout;
716 bool hexret;
717 } syscall_fmts[] = {
718 { .name = "access",
719 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
720 { .name = "arch_prctl",
721 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
722 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
723 { .name = "bind",
724 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
725 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
726 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
727 { .name = "bpf",
728 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
729 { .name = "brk", .hexret = true,
730 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
731 { .name = "clock_gettime",
732 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
733 { .name = "clone", .errpid = true, .nr_args = 5,
734 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
735 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
736 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
737 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
738 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
739 { .name = "close",
740 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
741 { .name = "connect",
742 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
743 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
744 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
745 { .name = "epoll_ctl",
746 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
747 { .name = "eventfd2",
748 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
749 { .name = "fchmodat",
750 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
751 { .name = "fchownat",
752 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
753 { .name = "fcntl",
754 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
755 .parm = &strarrays__fcntl_cmds_arrays,
756 .show_zero = true, },
757 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
758 { .name = "flock",
759 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
760 { .name = "fsconfig",
761 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
762 { .name = "fsmount",
763 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
764 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
765 { .name = "fspick",
766 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
767 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
768 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
769 { .name = "fstat", .alias = "newfstat", },
770 { .name = "fstatat", .alias = "newfstatat", },
771 { .name = "futex",
772 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
773 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
774 { .name = "futimesat",
775 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
776 { .name = "getitimer",
777 .arg = { [0] = STRARRAY(which, itimers), }, },
778 { .name = "getpid", .errpid = true, },
779 { .name = "getpgid", .errpid = true, },
780 { .name = "getppid", .errpid = true, },
781 { .name = "getrandom",
782 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
783 { .name = "getrlimit",
784 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
785 { .name = "gettid", .errpid = true, },
786 { .name = "ioctl",
787 .arg = {
788 #if defined(__i386__) || defined(__x86_64__)
789 /*
790 * FIXME: Make this available to all arches.
791 */
792 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
793 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
794 #else
795 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
796 #endif
797 { .name = "kcmp", .nr_args = 5,
798 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
799 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
800 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
801 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
802 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
803 { .name = "keyctl",
804 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
805 { .name = "kill",
806 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
807 { .name = "linkat",
808 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
809 { .name = "lseek",
810 .arg = { [2] = STRARRAY(whence, whences), }, },
811 { .name = "lstat", .alias = "newlstat", },
812 { .name = "madvise",
813 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
814 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
815 { .name = "mkdirat",
816 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
817 { .name = "mknodat",
818 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
819 { .name = "mmap", .hexret = true,
820 /* The standard mmap maps to old_mmap on s390x */
821 #if defined(__s390x__)
822 .alias = "old_mmap",
823 #endif
824 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
825 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ },
826 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
827 { .name = "mount",
828 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
829 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
830 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
831 { .name = "move_mount",
832 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
833 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
834 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
835 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
836 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
837 { .name = "mprotect",
838 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
839 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
840 { .name = "mq_unlink",
841 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
842 { .name = "mremap", .hexret = true,
843 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
844 { .name = "name_to_handle_at",
845 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
846 { .name = "newfstatat",
847 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
848 { .name = "open",
849 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
850 { .name = "open_by_handle_at",
851 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
852 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
853 { .name = "openat",
854 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
855 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
856 { .name = "perf_event_open",
857 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
858 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
859 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
860 { .name = "pipe2",
861 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
862 { .name = "pkey_alloc",
863 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
864 { .name = "pkey_free",
865 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
866 { .name = "pkey_mprotect",
867 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
868 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
869 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
870 { .name = "poll", .timeout = true, },
871 { .name = "ppoll", .timeout = true, },
872 { .name = "prctl",
873 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
874 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
875 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
876 { .name = "pread", .alias = "pread64", },
877 { .name = "preadv", .alias = "pread", },
878 { .name = "prlimit64",
879 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
880 { .name = "pwrite", .alias = "pwrite64", },
881 { .name = "readlinkat",
882 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
883 { .name = "recvfrom",
884 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
885 { .name = "recvmmsg",
886 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
887 { .name = "recvmsg",
888 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
889 { .name = "renameat",
890 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
891 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
892 { .name = "renameat2",
893 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
894 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
895 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
896 { .name = "rt_sigaction",
897 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
898 { .name = "rt_sigprocmask",
899 .arg = { [0] = STRARRAY(how, sighow), }, },
900 { .name = "rt_sigqueueinfo",
901 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
902 { .name = "rt_tgsigqueueinfo",
903 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
904 { .name = "sched_setscheduler",
905 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
906 { .name = "seccomp",
907 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
908 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
909 { .name = "select", .timeout = true, },
910 { .name = "sendfile", .alias = "sendfile64", },
911 { .name = "sendmmsg",
912 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
913 { .name = "sendmsg",
914 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
915 { .name = "sendto",
916 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
917 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
918 { .name = "set_tid_address", .errpid = true, },
919 { .name = "setitimer",
920 .arg = { [0] = STRARRAY(which, itimers), }, },
921 { .name = "setrlimit",
922 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
923 { .name = "socket",
924 .arg = { [0] = STRARRAY(family, socket_families),
925 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
926 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
927 { .name = "socketpair",
928 .arg = { [0] = STRARRAY(family, socket_families),
929 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
930 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
931 { .name = "stat", .alias = "newstat", },
932 { .name = "statx",
933 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
934 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
935 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
936 { .name = "swapoff",
937 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
938 { .name = "swapon",
939 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
940 { .name = "symlinkat",
941 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
942 { .name = "sync_file_range",
943 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
944 { .name = "tgkill",
945 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
946 { .name = "tkill",
947 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
948 { .name = "umount2", .alias = "umount",
949 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
950 { .name = "uname", .alias = "newuname", },
951 { .name = "unlinkat",
952 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
953 { .name = "utimensat",
954 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
955 { .name = "wait4", .errpid = true,
956 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
957 { .name = "waitid", .errpid = true,
958 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
959 };
960
961 static int syscall_fmt__cmp(const void *name, const void *fmtp)
962 {
963 const struct syscall_fmt *fmt = fmtp;
964 return strcmp(name, fmt->name);
965 }
966
967 static struct syscall_fmt *syscall_fmt__find(const char *name)
968 {
969 const int nmemb = ARRAY_SIZE(syscall_fmts);
970 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
971 }
972
973 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
974 {
975 int i, nmemb = ARRAY_SIZE(syscall_fmts);
976
977 for (i = 0; i < nmemb; ++i) {
978 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0)
979 return &syscall_fmts[i];
980 }
981
982 return NULL;
983 }
984
985 /*
986 * is_exit: is this "exit" or "exit_group"?
987 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
988 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
989 * nonexistent: Just a hole in the syscall table, syscall id not allocated
990 */
991 struct syscall {
992 struct tep_event *tp_format;
993 int nr_args;
994 int args_size;
995 struct {
996 struct bpf_program *sys_enter,
997 *sys_exit;
998 } bpf_prog;
999 bool is_exit;
1000 bool is_open;
1001 bool nonexistent;
1002 struct tep_format_field *args;
1003 const char *name;
1004 struct syscall_fmt *fmt;
1005 struct syscall_arg_fmt *arg_fmt;
1006 };
1007
1008 /*
1009 * Must match what is in the BPF program:
1010 *
1011 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1012 */
1013 struct bpf_map_syscall_entry {
1014 bool enabled;
1015 u16 string_args_len[6];
1016 };
1017
1018 /*
1019 * We need to have this 'calculated' boolean because in some cases we really
1020 * don't know what is the duration of a syscall, for instance, when we start
1021 * a session and some threads are waiting for a syscall to finish, say 'poll',
1022 * in which case all we can do is to print "( ? ) for duration and for the
1023 * start timestamp.
1024 */
1025 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1026 {
1027 double duration = (double)t / NSEC_PER_MSEC;
1028 size_t printed = fprintf(fp, "(");
1029
1030 if (!calculated)
1031 printed += fprintf(fp, " ");
1032 else if (duration >= 1.0)
1033 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1034 else if (duration >= 0.01)
1035 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1036 else
1037 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1038 return printed + fprintf(fp, "): ");
1039 }
1040
1041 /**
1042 * filename.ptr: The filename char pointer that will be vfs_getname'd
1043 * filename.entry_str_pos: Where to insert the string translated from
1044 * filename.ptr by the vfs_getname tracepoint/kprobe.
1045 * ret_scnprintf: syscall args may set this to a different syscall return
1046 * formatter, for instance, fcntl may return fds, file flags, etc.
1047 */
1048 struct thread_trace {
1049 u64 entry_time;
1050 bool entry_pending;
1051 unsigned long nr_events;
1052 unsigned long pfmaj, pfmin;
1053 char *entry_str;
1054 double runtime_ms;
1055 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1056 struct {
1057 unsigned long ptr;
1058 short int entry_str_pos;
1059 bool pending_open;
1060 unsigned int namelen;
1061 char *name;
1062 } filename;
1063 struct {
1064 int max;
1065 struct file *table;
1066 } files;
1067
1068 struct intlist *syscall_stats;
1069 };
1070
1071 static struct thread_trace *thread_trace__new(void)
1072 {
1073 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1074
1075 if (ttrace) {
1076 ttrace->files.max = -1;
1077 ttrace->syscall_stats = intlist__new(NULL);
1078 }
1079
1080 return ttrace;
1081 }
1082
1083 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1084 {
1085 struct thread_trace *ttrace;
1086
1087 if (thread == NULL)
1088 goto fail;
1089
1090 if (thread__priv(thread) == NULL)
1091 thread__set_priv(thread, thread_trace__new());
1092
1093 if (thread__priv(thread) == NULL)
1094 goto fail;
1095
1096 ttrace = thread__priv(thread);
1097 ++ttrace->nr_events;
1098
1099 return ttrace;
1100 fail:
1101 color_fprintf(fp, PERF_COLOR_RED,
1102 "WARNING: not enough memory, dropping samples!\n");
1103 return NULL;
1104 }
1105
1106
1107 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1108 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1109 {
1110 struct thread_trace *ttrace = thread__priv(arg->thread);
1111
1112 ttrace->ret_scnprintf = ret_scnprintf;
1113 }
1114
1115 #define TRACE_PFMAJ (1 << 0)
1116 #define TRACE_PFMIN (1 << 1)
1117
1118 static const size_t trace__entry_str_size = 2048;
1119
1120 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1121 {
1122 if (fd < 0)
1123 return NULL;
1124
1125 if (fd > ttrace->files.max) {
1126 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1127
1128 if (nfiles == NULL)
1129 return NULL;
1130
1131 if (ttrace->files.max != -1) {
1132 memset(nfiles + ttrace->files.max + 1, 0,
1133 (fd - ttrace->files.max) * sizeof(struct file));
1134 } else {
1135 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1136 }
1137
1138 ttrace->files.table = nfiles;
1139 ttrace->files.max = fd;
1140 }
1141
1142 return ttrace->files.table + fd;
1143 }
1144
1145 struct file *thread__files_entry(struct thread *thread, int fd)
1146 {
1147 return thread_trace__files_entry(thread__priv(thread), fd);
1148 }
1149
1150 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1151 {
1152 struct thread_trace *ttrace = thread__priv(thread);
1153 struct file *file = thread_trace__files_entry(ttrace, fd);
1154
1155 if (file != NULL) {
1156 struct stat st;
1157 if (stat(pathname, &st) == 0)
1158 file->dev_maj = major(st.st_rdev);
1159 file->pathname = strdup(pathname);
1160 if (file->pathname)
1161 return 0;
1162 }
1163
1164 return -1;
1165 }
1166
1167 static int thread__read_fd_path(struct thread *thread, int fd)
1168 {
1169 char linkname[PATH_MAX], pathname[PATH_MAX];
1170 struct stat st;
1171 int ret;
1172
1173 if (thread->pid_ == thread->tid) {
1174 scnprintf(linkname, sizeof(linkname),
1175 "/proc/%d/fd/%d", thread->pid_, fd);
1176 } else {
1177 scnprintf(linkname, sizeof(linkname),
1178 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1179 }
1180
1181 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1182 return -1;
1183
1184 ret = readlink(linkname, pathname, sizeof(pathname));
1185
1186 if (ret < 0 || ret > st.st_size)
1187 return -1;
1188
1189 pathname[ret] = '\0';
1190 return trace__set_fd_pathname(thread, fd, pathname);
1191 }
1192
1193 static const char *thread__fd_path(struct thread *thread, int fd,
1194 struct trace *trace)
1195 {
1196 struct thread_trace *ttrace = thread__priv(thread);
1197
1198 if (ttrace == NULL || trace->fd_path_disabled)
1199 return NULL;
1200
1201 if (fd < 0)
1202 return NULL;
1203
1204 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1205 if (!trace->live)
1206 return NULL;
1207 ++trace->stats.proc_getname;
1208 if (thread__read_fd_path(thread, fd))
1209 return NULL;
1210 }
1211
1212 return ttrace->files.table[fd].pathname;
1213 }
1214
1215 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1216 {
1217 int fd = arg->val;
1218 size_t printed = scnprintf(bf, size, "%d", fd);
1219 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1220
1221 if (path)
1222 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1223
1224 return printed;
1225 }
1226
1227 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1228 {
1229 size_t printed = scnprintf(bf, size, "%d", fd);
1230 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1231
1232 if (thread) {
1233 const char *path = thread__fd_path(thread, fd, trace);
1234
1235 if (path)
1236 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1237
1238 thread__put(thread);
1239 }
1240
1241 return printed;
1242 }
1243
1244 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1245 struct syscall_arg *arg)
1246 {
1247 int fd = arg->val;
1248 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1249 struct thread_trace *ttrace = thread__priv(arg->thread);
1250
1251 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1252 zfree(&ttrace->files.table[fd].pathname);
1253
1254 return printed;
1255 }
1256
1257 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1258 unsigned long ptr)
1259 {
1260 struct thread_trace *ttrace = thread__priv(thread);
1261
1262 ttrace->filename.ptr = ptr;
1263 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1264 }
1265
1266 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1267 {
1268 struct augmented_arg *augmented_arg = arg->augmented.args;
1269 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1270 /*
1271 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1272 * we would have two strings, each prefixed by its size.
1273 */
1274 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1275
1276 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1277 arg->augmented.size -= consumed;
1278
1279 return printed;
1280 }
1281
1282 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1283 struct syscall_arg *arg)
1284 {
1285 unsigned long ptr = arg->val;
1286
1287 if (arg->augmented.args)
1288 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1289
1290 if (!arg->trace->vfs_getname)
1291 return scnprintf(bf, size, "%#x", ptr);
1292
1293 thread__set_filename_pos(arg->thread, bf, ptr);
1294 return 0;
1295 }
1296
1297 static bool trace__filter_duration(struct trace *trace, double t)
1298 {
1299 return t < (trace->duration_filter * NSEC_PER_MSEC);
1300 }
1301
1302 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1303 {
1304 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1305
1306 return fprintf(fp, "%10.3f ", ts);
1307 }
1308
1309 /*
1310 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1311 * using ttrace->entry_time for a thread that receives a sys_exit without
1312 * first having received a sys_enter ("poll" issued before tracing session
1313 * starts, lost sys_enter exit due to ring buffer overflow).
1314 */
1315 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1316 {
1317 if (tstamp > 0)
1318 return __trace__fprintf_tstamp(trace, tstamp, fp);
1319
1320 return fprintf(fp, " ? ");
1321 }
1322
1323 static bool done = false;
1324 static bool interrupted = false;
1325
1326 static void sig_handler(int sig)
1327 {
1328 done = true;
1329 interrupted = sig == SIGINT;
1330 }
1331
1332 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1333 {
1334 size_t printed = 0;
1335
1336 if (trace->multiple_threads) {
1337 if (trace->show_comm)
1338 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1339 printed += fprintf(fp, "%d ", thread->tid);
1340 }
1341
1342 return printed;
1343 }
1344
1345 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1346 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1347 {
1348 size_t printed = 0;
1349
1350 if (trace->show_tstamp)
1351 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1352 if (trace->show_duration)
1353 printed += fprintf_duration(duration, duration_calculated, fp);
1354 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1355 }
1356
1357 static int trace__process_event(struct trace *trace, struct machine *machine,
1358 union perf_event *event, struct perf_sample *sample)
1359 {
1360 int ret = 0;
1361
1362 switch (event->header.type) {
1363 case PERF_RECORD_LOST:
1364 color_fprintf(trace->output, PERF_COLOR_RED,
1365 "LOST %" PRIu64 " events!\n", event->lost.lost);
1366 ret = machine__process_lost_event(machine, event, sample);
1367 break;
1368 default:
1369 ret = machine__process_event(machine, event, sample);
1370 break;
1371 }
1372
1373 return ret;
1374 }
1375
1376 static int trace__tool_process(struct perf_tool *tool,
1377 union perf_event *event,
1378 struct perf_sample *sample,
1379 struct machine *machine)
1380 {
1381 struct trace *trace = container_of(tool, struct trace, tool);
1382 return trace__process_event(trace, machine, event, sample);
1383 }
1384
1385 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1386 {
1387 struct machine *machine = vmachine;
1388
1389 if (machine->kptr_restrict_warned)
1390 return NULL;
1391
1392 if (symbol_conf.kptr_restrict) {
1393 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1394 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1395 "Kernel samples will not be resolved.\n");
1396 machine->kptr_restrict_warned = true;
1397 return NULL;
1398 }
1399
1400 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1401 }
1402
1403 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1404 {
1405 int err = symbol__init(NULL);
1406
1407 if (err)
1408 return err;
1409
1410 trace->host = machine__new_host();
1411 if (trace->host == NULL)
1412 return -ENOMEM;
1413
1414 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1415 if (err < 0)
1416 goto out;
1417
1418 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1419 evlist->core.threads, trace__tool_process, false,
1420 1);
1421 out:
1422 if (err)
1423 symbol__exit();
1424
1425 return err;
1426 }
1427
1428 static void trace__symbols__exit(struct trace *trace)
1429 {
1430 machine__exit(trace->host);
1431 trace->host = NULL;
1432
1433 symbol__exit();
1434 }
1435
1436 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1437 {
1438 int idx;
1439
1440 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1441 nr_args = sc->fmt->nr_args;
1442
1443 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1444 if (sc->arg_fmt == NULL)
1445 return -1;
1446
1447 for (idx = 0; idx < nr_args; ++idx) {
1448 if (sc->fmt)
1449 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1450 }
1451
1452 sc->nr_args = nr_args;
1453 return 0;
1454 }
1455
1456 static int syscall__set_arg_fmts(struct syscall *sc)
1457 {
1458 struct tep_format_field *field, *last_field = NULL;
1459 int idx = 0, len;
1460
1461 for (field = sc->args; field; field = field->next, ++idx) {
1462 last_field = field;
1463
1464 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1465 continue;
1466
1467 len = strlen(field->name);
1468
1469 if (strcmp(field->type, "const char *") == 0 &&
1470 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1471 strstr(field->name, "path") != NULL))
1472 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1473 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1474 sc->arg_fmt[idx].scnprintf = SCA_PTR;
1475 else if (strcmp(field->type, "pid_t") == 0)
1476 sc->arg_fmt[idx].scnprintf = SCA_PID;
1477 else if (strcmp(field->type, "umode_t") == 0)
1478 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1479 else if ((strcmp(field->type, "int") == 0 ||
1480 strcmp(field->type, "unsigned int") == 0 ||
1481 strcmp(field->type, "long") == 0) &&
1482 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1483 /*
1484 * /sys/kernel/tracing/events/syscalls/sys_enter*
1485 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1486 * 65 int
1487 * 23 unsigned int
1488 * 7 unsigned long
1489 */
1490 sc->arg_fmt[idx].scnprintf = SCA_FD;
1491 }
1492 }
1493
1494 if (last_field)
1495 sc->args_size = last_field->offset + last_field->size;
1496
1497 return 0;
1498 }
1499
1500 static int trace__read_syscall_info(struct trace *trace, int id)
1501 {
1502 char tp_name[128];
1503 struct syscall *sc;
1504 const char *name = syscalltbl__name(trace->sctbl, id);
1505
1506 if (trace->syscalls.table == NULL) {
1507 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1508 if (trace->syscalls.table == NULL)
1509 return -ENOMEM;
1510 }
1511
1512 sc = trace->syscalls.table + id;
1513 if (sc->nonexistent)
1514 return 0;
1515
1516 if (name == NULL) {
1517 sc->nonexistent = true;
1518 return 0;
1519 }
1520
1521 sc->name = name;
1522 sc->fmt = syscall_fmt__find(sc->name);
1523
1524 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1525 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1526
1527 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1528 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1529 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1530 }
1531
1532 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1533 return -ENOMEM;
1534
1535 if (IS_ERR(sc->tp_format))
1536 return PTR_ERR(sc->tp_format);
1537
1538 sc->args = sc->tp_format->format.fields;
1539 /*
1540 * We need to check and discard the first variable '__syscall_nr'
1541 * or 'nr' that mean the syscall number. It is needless here.
1542 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1543 */
1544 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1545 sc->args = sc->args->next;
1546 --sc->nr_args;
1547 }
1548
1549 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1550 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1551
1552 return syscall__set_arg_fmts(sc);
1553 }
1554
1555 static int intcmp(const void *a, const void *b)
1556 {
1557 const int *one = a, *another = b;
1558
1559 return *one - *another;
1560 }
1561
1562 static int trace__validate_ev_qualifier(struct trace *trace)
1563 {
1564 int err = 0;
1565 bool printed_invalid_prefix = false;
1566 struct str_node *pos;
1567 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1568
1569 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1570 sizeof(trace->ev_qualifier_ids.entries[0]));
1571
1572 if (trace->ev_qualifier_ids.entries == NULL) {
1573 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1574 trace->output);
1575 err = -EINVAL;
1576 goto out;
1577 }
1578
1579 strlist__for_each_entry(pos, trace->ev_qualifier) {
1580 const char *sc = pos->s;
1581 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1582
1583 if (id < 0) {
1584 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1585 if (id >= 0)
1586 goto matches;
1587
1588 if (!printed_invalid_prefix) {
1589 pr_debug("Skipping unknown syscalls: ");
1590 printed_invalid_prefix = true;
1591 } else {
1592 pr_debug(", ");
1593 }
1594
1595 pr_debug("%s", sc);
1596 continue;
1597 }
1598 matches:
1599 trace->ev_qualifier_ids.entries[nr_used++] = id;
1600 if (match_next == -1)
1601 continue;
1602
1603 while (1) {
1604 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1605 if (id < 0)
1606 break;
1607 if (nr_allocated == nr_used) {
1608 void *entries;
1609
1610 nr_allocated += 8;
1611 entries = realloc(trace->ev_qualifier_ids.entries,
1612 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1613 if (entries == NULL) {
1614 err = -ENOMEM;
1615 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1616 goto out_free;
1617 }
1618 trace->ev_qualifier_ids.entries = entries;
1619 }
1620 trace->ev_qualifier_ids.entries[nr_used++] = id;
1621 }
1622 }
1623
1624 trace->ev_qualifier_ids.nr = nr_used;
1625 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1626 out:
1627 if (printed_invalid_prefix)
1628 pr_debug("\n");
1629 return err;
1630 out_free:
1631 zfree(&trace->ev_qualifier_ids.entries);
1632 trace->ev_qualifier_ids.nr = 0;
1633 goto out;
1634 }
1635
1636 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1637 {
1638 bool in_ev_qualifier;
1639
1640 if (trace->ev_qualifier_ids.nr == 0)
1641 return true;
1642
1643 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1644 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1645
1646 if (in_ev_qualifier)
1647 return !trace->not_ev_qualifier;
1648
1649 return trace->not_ev_qualifier;
1650 }
1651
1652 /*
1653 * args is to be interpreted as a series of longs but we need to handle
1654 * 8-byte unaligned accesses. args points to raw_data within the event
1655 * and raw_data is guaranteed to be 8-byte unaligned because it is
1656 * preceded by raw_size which is a u32. So we need to copy args to a temp
1657 * variable to read it. Most notably this avoids extended load instructions
1658 * on unaligned addresses
1659 */
1660 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1661 {
1662 unsigned long val;
1663 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1664
1665 memcpy(&val, p, sizeof(val));
1666 return val;
1667 }
1668
1669 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1670 struct syscall_arg *arg)
1671 {
1672 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1673 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1674
1675 return scnprintf(bf, size, "arg%d: ", arg->idx);
1676 }
1677
1678 /*
1679 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1680 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1681 * in tools/perf/trace/beauty/mount_flags.c
1682 */
1683 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val)
1684 {
1685 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val)
1686 return sc->arg_fmt[arg->idx].mask_val(arg, val);
1687
1688 return val;
1689 }
1690
1691 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1692 struct syscall_arg *arg, unsigned long val)
1693 {
1694 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1695 arg->val = val;
1696 if (sc->arg_fmt[arg->idx].parm)
1697 arg->parm = sc->arg_fmt[arg->idx].parm;
1698 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1699 }
1700 return scnprintf(bf, size, "%ld", val);
1701 }
1702
1703 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1704 unsigned char *args, void *augmented_args, int augmented_args_size,
1705 struct trace *trace, struct thread *thread)
1706 {
1707 size_t printed = 0;
1708 unsigned long val;
1709 u8 bit = 1;
1710 struct syscall_arg arg = {
1711 .args = args,
1712 .augmented = {
1713 .size = augmented_args_size,
1714 .args = augmented_args,
1715 },
1716 .idx = 0,
1717 .mask = 0,
1718 .trace = trace,
1719 .thread = thread,
1720 .show_string_prefix = trace->show_string_prefix,
1721 };
1722 struct thread_trace *ttrace = thread__priv(thread);
1723
1724 /*
1725 * Things like fcntl will set this in its 'cmd' formatter to pick the
1726 * right formatter for the return value (an fd? file flags?), which is
1727 * not needed for syscalls that always return a given type, say an fd.
1728 */
1729 ttrace->ret_scnprintf = NULL;
1730
1731 if (sc->args != NULL) {
1732 struct tep_format_field *field;
1733
1734 for (field = sc->args; field;
1735 field = field->next, ++arg.idx, bit <<= 1) {
1736 if (arg.mask & bit)
1737 continue;
1738
1739 val = syscall_arg__val(&arg, arg.idx);
1740 /*
1741 * Some syscall args need some mask, most don't and
1742 * return val untouched.
1743 */
1744 val = syscall__mask_val(sc, &arg, val);
1745
1746 /*
1747 * Suppress this argument if its value is zero and
1748 * and we don't have a string associated in an
1749 * strarray for it.
1750 */
1751 if (val == 0 &&
1752 !trace->show_zeros &&
1753 !(sc->arg_fmt &&
1754 (sc->arg_fmt[arg.idx].show_zero ||
1755 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1756 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1757 sc->arg_fmt[arg.idx].parm))
1758 continue;
1759
1760 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
1761
1762 if (trace->show_arg_names)
1763 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
1764
1765 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1766 }
1767 } else if (IS_ERR(sc->tp_format)) {
1768 /*
1769 * If we managed to read the tracepoint /format file, then we
1770 * may end up not having any args, like with gettid(), so only
1771 * print the raw args when we didn't manage to read it.
1772 */
1773 while (arg.idx < sc->nr_args) {
1774 if (arg.mask & bit)
1775 goto next_arg;
1776 val = syscall_arg__val(&arg, arg.idx);
1777 if (printed)
1778 printed += scnprintf(bf + printed, size - printed, ", ");
1779 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1780 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1781 next_arg:
1782 ++arg.idx;
1783 bit <<= 1;
1784 }
1785 }
1786
1787 return printed;
1788 }
1789
1790 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
1791 union perf_event *event,
1792 struct perf_sample *sample);
1793
1794 static struct syscall *trace__syscall_info(struct trace *trace,
1795 struct evsel *evsel, int id)
1796 {
1797 int err = 0;
1798
1799 if (id < 0) {
1800
1801 /*
1802 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1803 * before that, leaving at a higher verbosity level till that is
1804 * explained. Reproduced with plain ftrace with:
1805 *
1806 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1807 * grep "NR -1 " /t/trace_pipe
1808 *
1809 * After generating some load on the machine.
1810 */
1811 if (verbose > 1) {
1812 static u64 n;
1813 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1814 id, perf_evsel__name(evsel), ++n);
1815 }
1816 return NULL;
1817 }
1818
1819 err = -EINVAL;
1820
1821 if (id > trace->sctbl->syscalls.max_id)
1822 goto out_cant_read;
1823
1824 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
1825 (err = trace__read_syscall_info(trace, id)) != 0)
1826 goto out_cant_read;
1827
1828 if (trace->syscalls.table[id].name == NULL) {
1829 if (trace->syscalls.table[id].nonexistent)
1830 return NULL;
1831 goto out_cant_read;
1832 }
1833
1834 return &trace->syscalls.table[id];
1835
1836 out_cant_read:
1837 if (verbose > 0) {
1838 char sbuf[STRERR_BUFSIZE];
1839 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
1840 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
1841 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1842 fputs(" information\n", trace->output);
1843 }
1844 return NULL;
1845 }
1846
1847 static void thread__update_stats(struct thread_trace *ttrace,
1848 int id, struct perf_sample *sample)
1849 {
1850 struct int_node *inode;
1851 struct stats *stats;
1852 u64 duration = 0;
1853
1854 inode = intlist__findnew(ttrace->syscall_stats, id);
1855 if (inode == NULL)
1856 return;
1857
1858 stats = inode->priv;
1859 if (stats == NULL) {
1860 stats = malloc(sizeof(struct stats));
1861 if (stats == NULL)
1862 return;
1863 init_stats(stats);
1864 inode->priv = stats;
1865 }
1866
1867 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1868 duration = sample->time - ttrace->entry_time;
1869
1870 update_stats(stats, duration);
1871 }
1872
1873 static int trace__printf_interrupted_entry(struct trace *trace)
1874 {
1875 struct thread_trace *ttrace;
1876 size_t printed;
1877 int len;
1878
1879 if (trace->failure_only || trace->current == NULL)
1880 return 0;
1881
1882 ttrace = thread__priv(trace->current);
1883
1884 if (!ttrace->entry_pending)
1885 return 0;
1886
1887 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1888 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
1889
1890 if (len < trace->args_alignment - 4)
1891 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
1892
1893 printed += fprintf(trace->output, " ...\n");
1894
1895 ttrace->entry_pending = false;
1896 ++trace->nr_events_printed;
1897
1898 return printed;
1899 }
1900
1901 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
1902 struct perf_sample *sample, struct thread *thread)
1903 {
1904 int printed = 0;
1905
1906 if (trace->print_sample) {
1907 double ts = (double)sample->time / NSEC_PER_MSEC;
1908
1909 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1910 perf_evsel__name(evsel), ts,
1911 thread__comm_str(thread),
1912 sample->pid, sample->tid, sample->cpu);
1913 }
1914
1915 return printed;
1916 }
1917
1918 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
1919 {
1920 void *augmented_args = NULL;
1921 /*
1922 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
1923 * and there we get all 6 syscall args plus the tracepoint common fields
1924 * that gets calculated at the start and the syscall_nr (another long).
1925 * So we check if that is the case and if so don't look after the
1926 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
1927 * which is fixed.
1928 *
1929 * We'll revisit this later to pass s->args_size to the BPF augmenter
1930 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
1931 * copies only what we need for each syscall, like what happens when we
1932 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
1933 * traffic to just what is needed for each syscall.
1934 */
1935 int args_size = raw_augmented_args_size ?: sc->args_size;
1936
1937 *augmented_args_size = sample->raw_size - args_size;
1938 if (*augmented_args_size > 0)
1939 augmented_args = sample->raw_data + args_size;
1940
1941 return augmented_args;
1942 }
1943
1944 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
1945 union perf_event *event __maybe_unused,
1946 struct perf_sample *sample)
1947 {
1948 char *msg;
1949 void *args;
1950 int printed = 0;
1951 struct thread *thread;
1952 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1953 int augmented_args_size = 0;
1954 void *augmented_args = NULL;
1955 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1956 struct thread_trace *ttrace;
1957
1958 if (sc == NULL)
1959 return -1;
1960
1961 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1962 ttrace = thread__trace(thread, trace->output);
1963 if (ttrace == NULL)
1964 goto out_put;
1965
1966 trace__fprintf_sample(trace, evsel, sample, thread);
1967
1968 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1969
1970 if (ttrace->entry_str == NULL) {
1971 ttrace->entry_str = malloc(trace__entry_str_size);
1972 if (!ttrace->entry_str)
1973 goto out_put;
1974 }
1975
1976 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1977 trace__printf_interrupted_entry(trace);
1978 /*
1979 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
1980 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
1981 * this breaks syscall__augmented_args() check for augmented args, as we calculate
1982 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
1983 * so when handling, say the openat syscall, we end up getting 6 args for the
1984 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
1985 * thinking that the extra 2 u64 args are the augmented filename, so just check
1986 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
1987 */
1988 if (evsel != trace->syscalls.events.sys_enter)
1989 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1990 ttrace->entry_time = sample->time;
1991 msg = ttrace->entry_str;
1992 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1993
1994 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1995 args, augmented_args, augmented_args_size, trace, thread);
1996
1997 if (sc->is_exit) {
1998 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1999 int alignment = 0;
2000
2001 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2002 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2003 if (trace->args_alignment > printed)
2004 alignment = trace->args_alignment - printed;
2005 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2006 }
2007 } else {
2008 ttrace->entry_pending = true;
2009 /* See trace__vfs_getname & trace__sys_exit */
2010 ttrace->filename.pending_open = false;
2011 }
2012
2013 if (trace->current != thread) {
2014 thread__put(trace->current);
2015 trace->current = thread__get(thread);
2016 }
2017 err = 0;
2018 out_put:
2019 thread__put(thread);
2020 return err;
2021 }
2022
2023 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2024 struct perf_sample *sample)
2025 {
2026 struct thread_trace *ttrace;
2027 struct thread *thread;
2028 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2029 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2030 char msg[1024];
2031 void *args, *augmented_args = NULL;
2032 int augmented_args_size;
2033
2034 if (sc == NULL)
2035 return -1;
2036
2037 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2038 ttrace = thread__trace(thread, trace->output);
2039 /*
2040 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2041 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2042 */
2043 if (ttrace == NULL)
2044 goto out_put;
2045
2046 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2047 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2048 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2049 fprintf(trace->output, "%s", msg);
2050 err = 0;
2051 out_put:
2052 thread__put(thread);
2053 return err;
2054 }
2055
2056 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2057 struct perf_sample *sample,
2058 struct callchain_cursor *cursor)
2059 {
2060 struct addr_location al;
2061 int max_stack = evsel->core.attr.sample_max_stack ?
2062 evsel->core.attr.sample_max_stack :
2063 trace->max_stack;
2064 int err;
2065
2066 if (machine__resolve(trace->host, &al, sample) < 0)
2067 return -1;
2068
2069 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2070 addr_location__put(&al);
2071 return err;
2072 }
2073
2074 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2075 {
2076 /* TODO: user-configurable print_opts */
2077 const unsigned int print_opts = EVSEL__PRINT_SYM |
2078 EVSEL__PRINT_DSO |
2079 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2080
2081 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2082 }
2083
2084 static const char *errno_to_name(struct evsel *evsel, int err)
2085 {
2086 struct perf_env *env = perf_evsel__env(evsel);
2087 const char *arch_name = perf_env__arch(env);
2088
2089 return arch_syscalls__strerrno(arch_name, err);
2090 }
2091
2092 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2093 union perf_event *event __maybe_unused,
2094 struct perf_sample *sample)
2095 {
2096 long ret;
2097 u64 duration = 0;
2098 bool duration_calculated = false;
2099 struct thread *thread;
2100 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2101 int alignment = trace->args_alignment;
2102 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2103 struct thread_trace *ttrace;
2104
2105 if (sc == NULL)
2106 return -1;
2107
2108 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2109 ttrace = thread__trace(thread, trace->output);
2110 if (ttrace == NULL)
2111 goto out_put;
2112
2113 trace__fprintf_sample(trace, evsel, sample, thread);
2114
2115 if (trace->summary)
2116 thread__update_stats(ttrace, id, sample);
2117
2118 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2119
2120 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2121 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2122 ttrace->filename.pending_open = false;
2123 ++trace->stats.vfs_getname;
2124 }
2125
2126 if (ttrace->entry_time) {
2127 duration = sample->time - ttrace->entry_time;
2128 if (trace__filter_duration(trace, duration))
2129 goto out;
2130 duration_calculated = true;
2131 } else if (trace->duration_filter)
2132 goto out;
2133
2134 if (sample->callchain) {
2135 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2136 if (callchain_ret == 0) {
2137 if (callchain_cursor.nr < trace->min_stack)
2138 goto out;
2139 callchain_ret = 1;
2140 }
2141 }
2142
2143 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2144 goto out;
2145
2146 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2147
2148 if (ttrace->entry_pending) {
2149 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2150 } else {
2151 printed += fprintf(trace->output, " ... [");
2152 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2153 printed += 9;
2154 printed += fprintf(trace->output, "]: %s()", sc->name);
2155 }
2156
2157 printed++; /* the closing ')' */
2158
2159 if (alignment > printed)
2160 alignment -= printed;
2161 else
2162 alignment = 0;
2163
2164 fprintf(trace->output, ")%*s= ", alignment, " ");
2165
2166 if (sc->fmt == NULL) {
2167 if (ret < 0)
2168 goto errno_print;
2169 signed_print:
2170 fprintf(trace->output, "%ld", ret);
2171 } else if (ret < 0) {
2172 errno_print: {
2173 char bf[STRERR_BUFSIZE];
2174 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2175 *e = errno_to_name(evsel, -ret);
2176
2177 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2178 }
2179 } else if (ret == 0 && sc->fmt->timeout)
2180 fprintf(trace->output, "0 (Timeout)");
2181 else if (ttrace->ret_scnprintf) {
2182 char bf[1024];
2183 struct syscall_arg arg = {
2184 .val = ret,
2185 .thread = thread,
2186 .trace = trace,
2187 };
2188 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2189 ttrace->ret_scnprintf = NULL;
2190 fprintf(trace->output, "%s", bf);
2191 } else if (sc->fmt->hexret)
2192 fprintf(trace->output, "%#lx", ret);
2193 else if (sc->fmt->errpid) {
2194 struct thread *child = machine__find_thread(trace->host, ret, ret);
2195
2196 if (child != NULL) {
2197 fprintf(trace->output, "%ld", ret);
2198 if (child->comm_set)
2199 fprintf(trace->output, " (%s)", thread__comm_str(child));
2200 thread__put(child);
2201 }
2202 } else
2203 goto signed_print;
2204
2205 fputc('\n', trace->output);
2206
2207 /*
2208 * We only consider an 'event' for the sake of --max-events a non-filtered
2209 * sys_enter + sys_exit and other tracepoint events.
2210 */
2211 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2212 interrupted = true;
2213
2214 if (callchain_ret > 0)
2215 trace__fprintf_callchain(trace, sample);
2216 else if (callchain_ret < 0)
2217 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2218 out:
2219 ttrace->entry_pending = false;
2220 err = 0;
2221 out_put:
2222 thread__put(thread);
2223 return err;
2224 }
2225
2226 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2227 union perf_event *event __maybe_unused,
2228 struct perf_sample *sample)
2229 {
2230 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2231 struct thread_trace *ttrace;
2232 size_t filename_len, entry_str_len, to_move;
2233 ssize_t remaining_space;
2234 char *pos;
2235 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2236
2237 if (!thread)
2238 goto out;
2239
2240 ttrace = thread__priv(thread);
2241 if (!ttrace)
2242 goto out_put;
2243
2244 filename_len = strlen(filename);
2245 if (filename_len == 0)
2246 goto out_put;
2247
2248 if (ttrace->filename.namelen < filename_len) {
2249 char *f = realloc(ttrace->filename.name, filename_len + 1);
2250
2251 if (f == NULL)
2252 goto out_put;
2253
2254 ttrace->filename.namelen = filename_len;
2255 ttrace->filename.name = f;
2256 }
2257
2258 strcpy(ttrace->filename.name, filename);
2259 ttrace->filename.pending_open = true;
2260
2261 if (!ttrace->filename.ptr)
2262 goto out_put;
2263
2264 entry_str_len = strlen(ttrace->entry_str);
2265 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2266 if (remaining_space <= 0)
2267 goto out_put;
2268
2269 if (filename_len > (size_t)remaining_space) {
2270 filename += filename_len - remaining_space;
2271 filename_len = remaining_space;
2272 }
2273
2274 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2275 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2276 memmove(pos + filename_len, pos, to_move);
2277 memcpy(pos, filename, filename_len);
2278
2279 ttrace->filename.ptr = 0;
2280 ttrace->filename.entry_str_pos = 0;
2281 out_put:
2282 thread__put(thread);
2283 out:
2284 return 0;
2285 }
2286
2287 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2288 union perf_event *event __maybe_unused,
2289 struct perf_sample *sample)
2290 {
2291 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2292 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2293 struct thread *thread = machine__findnew_thread(trace->host,
2294 sample->pid,
2295 sample->tid);
2296 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2297
2298 if (ttrace == NULL)
2299 goto out_dump;
2300
2301 ttrace->runtime_ms += runtime_ms;
2302 trace->runtime_ms += runtime_ms;
2303 out_put:
2304 thread__put(thread);
2305 return 0;
2306
2307 out_dump:
2308 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2309 evsel->name,
2310 perf_evsel__strval(evsel, sample, "comm"),
2311 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2312 runtime,
2313 perf_evsel__intval(evsel, sample, "vruntime"));
2314 goto out_put;
2315 }
2316
2317 static int bpf_output__printer(enum binary_printer_ops op,
2318 unsigned int val, void *extra __maybe_unused, FILE *fp)
2319 {
2320 unsigned char ch = (unsigned char)val;
2321
2322 switch (op) {
2323 case BINARY_PRINT_CHAR_DATA:
2324 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2325 case BINARY_PRINT_DATA_BEGIN:
2326 case BINARY_PRINT_LINE_BEGIN:
2327 case BINARY_PRINT_ADDR:
2328 case BINARY_PRINT_NUM_DATA:
2329 case BINARY_PRINT_NUM_PAD:
2330 case BINARY_PRINT_SEP:
2331 case BINARY_PRINT_CHAR_PAD:
2332 case BINARY_PRINT_LINE_END:
2333 case BINARY_PRINT_DATA_END:
2334 default:
2335 break;
2336 }
2337
2338 return 0;
2339 }
2340
2341 static void bpf_output__fprintf(struct trace *trace,
2342 struct perf_sample *sample)
2343 {
2344 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2345 bpf_output__printer, NULL, trace->output);
2346 ++trace->nr_events_printed;
2347 }
2348
2349 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2350 union perf_event *event __maybe_unused,
2351 struct perf_sample *sample)
2352 {
2353 struct thread *thread;
2354 int callchain_ret = 0;
2355 /*
2356 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2357 * this event's max_events having been hit and this is an entry coming
2358 * from the ring buffer that we should discard, since the max events
2359 * have already been considered/printed.
2360 */
2361 if (evsel->disabled)
2362 return 0;
2363
2364 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2365
2366 if (sample->callchain) {
2367 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2368 if (callchain_ret == 0) {
2369 if (callchain_cursor.nr < trace->min_stack)
2370 goto out;
2371 callchain_ret = 1;
2372 }
2373 }
2374
2375 trace__printf_interrupted_entry(trace);
2376 trace__fprintf_tstamp(trace, sample->time, trace->output);
2377
2378 if (trace->trace_syscalls && trace->show_duration)
2379 fprintf(trace->output, "( ): ");
2380
2381 if (thread)
2382 trace__fprintf_comm_tid(trace, thread, trace->output);
2383
2384 if (evsel == trace->syscalls.events.augmented) {
2385 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2386 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2387
2388 if (sc) {
2389 fprintf(trace->output, "%s(", sc->name);
2390 trace__fprintf_sys_enter(trace, evsel, sample);
2391 fputc(')', trace->output);
2392 goto newline;
2393 }
2394
2395 /*
2396 * XXX: Not having the associated syscall info or not finding/adding
2397 * the thread should never happen, but if it does...
2398 * fall thru and print it as a bpf_output event.
2399 */
2400 }
2401
2402 fprintf(trace->output, "%s:", evsel->name);
2403
2404 if (perf_evsel__is_bpf_output(evsel)) {
2405 bpf_output__fprintf(trace, sample);
2406 } else if (evsel->tp_format) {
2407 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2408 trace__fprintf_sys_enter(trace, evsel, sample)) {
2409 event_format__fprintf(evsel->tp_format, sample->cpu,
2410 sample->raw_data, sample->raw_size,
2411 trace->output);
2412 ++trace->nr_events_printed;
2413
2414 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2415 evsel__disable(evsel);
2416 evsel__close(evsel);
2417 }
2418 }
2419 }
2420
2421 newline:
2422 fprintf(trace->output, "\n");
2423
2424 if (callchain_ret > 0)
2425 trace__fprintf_callchain(trace, sample);
2426 else if (callchain_ret < 0)
2427 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2428 out:
2429 thread__put(thread);
2430 return 0;
2431 }
2432
2433 static void print_location(FILE *f, struct perf_sample *sample,
2434 struct addr_location *al,
2435 bool print_dso, bool print_sym)
2436 {
2437
2438 if ((verbose > 0 || print_dso) && al->map)
2439 fprintf(f, "%s@", al->map->dso->long_name);
2440
2441 if ((verbose > 0 || print_sym) && al->sym)
2442 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2443 al->addr - al->sym->start);
2444 else if (al->map)
2445 fprintf(f, "0x%" PRIx64, al->addr);
2446 else
2447 fprintf(f, "0x%" PRIx64, sample->addr);
2448 }
2449
2450 static int trace__pgfault(struct trace *trace,
2451 struct evsel *evsel,
2452 union perf_event *event __maybe_unused,
2453 struct perf_sample *sample)
2454 {
2455 struct thread *thread;
2456 struct addr_location al;
2457 char map_type = 'd';
2458 struct thread_trace *ttrace;
2459 int err = -1;
2460 int callchain_ret = 0;
2461
2462 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2463
2464 if (sample->callchain) {
2465 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2466 if (callchain_ret == 0) {
2467 if (callchain_cursor.nr < trace->min_stack)
2468 goto out_put;
2469 callchain_ret = 1;
2470 }
2471 }
2472
2473 ttrace = thread__trace(thread, trace->output);
2474 if (ttrace == NULL)
2475 goto out_put;
2476
2477 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2478 ttrace->pfmaj++;
2479 else
2480 ttrace->pfmin++;
2481
2482 if (trace->summary_only)
2483 goto out;
2484
2485 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2486
2487 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2488
2489 fprintf(trace->output, "%sfault [",
2490 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2491 "maj" : "min");
2492
2493 print_location(trace->output, sample, &al, false, true);
2494
2495 fprintf(trace->output, "] => ");
2496
2497 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2498
2499 if (!al.map) {
2500 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2501
2502 if (al.map)
2503 map_type = 'x';
2504 else
2505 map_type = '?';
2506 }
2507
2508 print_location(trace->output, sample, &al, true, false);
2509
2510 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2511
2512 if (callchain_ret > 0)
2513 trace__fprintf_callchain(trace, sample);
2514 else if (callchain_ret < 0)
2515 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2516
2517 ++trace->nr_events_printed;
2518 out:
2519 err = 0;
2520 out_put:
2521 thread__put(thread);
2522 return err;
2523 }
2524
2525 static void trace__set_base_time(struct trace *trace,
2526 struct evsel *evsel,
2527 struct perf_sample *sample)
2528 {
2529 /*
2530 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2531 * and don't use sample->time unconditionally, we may end up having
2532 * some other event in the future without PERF_SAMPLE_TIME for good
2533 * reason, i.e. we may not be interested in its timestamps, just in
2534 * it taking place, picking some piece of information when it
2535 * appears in our event stream (vfs_getname comes to mind).
2536 */
2537 if (trace->base_time == 0 && !trace->full_time &&
2538 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2539 trace->base_time = sample->time;
2540 }
2541
2542 static int trace__process_sample(struct perf_tool *tool,
2543 union perf_event *event,
2544 struct perf_sample *sample,
2545 struct evsel *evsel,
2546 struct machine *machine __maybe_unused)
2547 {
2548 struct trace *trace = container_of(tool, struct trace, tool);
2549 struct thread *thread;
2550 int err = 0;
2551
2552 tracepoint_handler handler = evsel->handler;
2553
2554 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2555 if (thread && thread__is_filtered(thread))
2556 goto out;
2557
2558 trace__set_base_time(trace, evsel, sample);
2559
2560 if (handler) {
2561 ++trace->nr_events;
2562 handler(trace, evsel, event, sample);
2563 }
2564 out:
2565 thread__put(thread);
2566 return err;
2567 }
2568
2569 static int trace__record(struct trace *trace, int argc, const char **argv)
2570 {
2571 unsigned int rec_argc, i, j;
2572 const char **rec_argv;
2573 const char * const record_args[] = {
2574 "record",
2575 "-R",
2576 "-m", "1024",
2577 "-c", "1",
2578 };
2579
2580 const char * const sc_args[] = { "-e", };
2581 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2582 const char * const majpf_args[] = { "-e", "major-faults" };
2583 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2584 const char * const minpf_args[] = { "-e", "minor-faults" };
2585 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2586
2587 /* +1 is for the event string below */
2588 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2589 majpf_args_nr + minpf_args_nr + argc;
2590 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2591
2592 if (rec_argv == NULL)
2593 return -ENOMEM;
2594
2595 j = 0;
2596 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2597 rec_argv[j++] = record_args[i];
2598
2599 if (trace->trace_syscalls) {
2600 for (i = 0; i < sc_args_nr; i++)
2601 rec_argv[j++] = sc_args[i];
2602
2603 /* event string may be different for older kernels - e.g., RHEL6 */
2604 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2605 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2606 else if (is_valid_tracepoint("syscalls:sys_enter"))
2607 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2608 else {
2609 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2610 free(rec_argv);
2611 return -1;
2612 }
2613 }
2614
2615 if (trace->trace_pgfaults & TRACE_PFMAJ)
2616 for (i = 0; i < majpf_args_nr; i++)
2617 rec_argv[j++] = majpf_args[i];
2618
2619 if (trace->trace_pgfaults & TRACE_PFMIN)
2620 for (i = 0; i < minpf_args_nr; i++)
2621 rec_argv[j++] = minpf_args[i];
2622
2623 for (i = 0; i < (unsigned int)argc; i++)
2624 rec_argv[j++] = argv[i];
2625
2626 return cmd_record(j, rec_argv);
2627 }
2628
2629 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2630
2631 static bool evlist__add_vfs_getname(struct evlist *evlist)
2632 {
2633 bool found = false;
2634 struct evsel *evsel, *tmp;
2635 struct parse_events_error err = { .idx = 0, };
2636 int ret = parse_events(evlist, "probe:vfs_getname*", &err);
2637
2638 if (ret)
2639 return false;
2640
2641 evlist__for_each_entry_safe(evlist, evsel, tmp) {
2642 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
2643 continue;
2644
2645 if (perf_evsel__field(evsel, "pathname")) {
2646 evsel->handler = trace__vfs_getname;
2647 found = true;
2648 continue;
2649 }
2650
2651 list_del_init(&evsel->core.node);
2652 evsel->evlist = NULL;
2653 evsel__delete(evsel);
2654 }
2655
2656 return found;
2657 }
2658
2659 static struct evsel *perf_evsel__new_pgfault(u64 config)
2660 {
2661 struct evsel *evsel;
2662 struct perf_event_attr attr = {
2663 .type = PERF_TYPE_SOFTWARE,
2664 .mmap_data = 1,
2665 };
2666
2667 attr.config = config;
2668 attr.sample_period = 1;
2669
2670 event_attr_init(&attr);
2671
2672 evsel = evsel__new(&attr);
2673 if (evsel)
2674 evsel->handler = trace__pgfault;
2675
2676 return evsel;
2677 }
2678
2679 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2680 {
2681 const u32 type = event->header.type;
2682 struct evsel *evsel;
2683
2684 if (type != PERF_RECORD_SAMPLE) {
2685 trace__process_event(trace, trace->host, event, sample);
2686 return;
2687 }
2688
2689 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2690 if (evsel == NULL) {
2691 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2692 return;
2693 }
2694
2695 if (evswitch__discard(&trace->evswitch, evsel))
2696 return;
2697
2698 trace__set_base_time(trace, evsel, sample);
2699
2700 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
2701 sample->raw_data == NULL) {
2702 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2703 perf_evsel__name(evsel), sample->tid,
2704 sample->cpu, sample->raw_size);
2705 } else {
2706 tracepoint_handler handler = evsel->handler;
2707 handler(trace, evsel, event, sample);
2708 }
2709
2710 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
2711 interrupted = true;
2712 }
2713
2714 static int trace__add_syscall_newtp(struct trace *trace)
2715 {
2716 int ret = -1;
2717 struct evlist *evlist = trace->evlist;
2718 struct evsel *sys_enter, *sys_exit;
2719
2720 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
2721 if (sys_enter == NULL)
2722 goto out;
2723
2724 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2725 goto out_delete_sys_enter;
2726
2727 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
2728 if (sys_exit == NULL)
2729 goto out_delete_sys_enter;
2730
2731 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2732 goto out_delete_sys_exit;
2733
2734 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2735 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2736
2737 evlist__add(evlist, sys_enter);
2738 evlist__add(evlist, sys_exit);
2739
2740 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2741 /*
2742 * We're interested only in the user space callchain
2743 * leading to the syscall, allow overriding that for
2744 * debugging reasons using --kernel_syscall_callchains
2745 */
2746 sys_exit->core.attr.exclude_callchain_kernel = 1;
2747 }
2748
2749 trace->syscalls.events.sys_enter = sys_enter;
2750 trace->syscalls.events.sys_exit = sys_exit;
2751
2752 ret = 0;
2753 out:
2754 return ret;
2755
2756 out_delete_sys_exit:
2757 evsel__delete_priv(sys_exit);
2758 out_delete_sys_enter:
2759 evsel__delete_priv(sys_enter);
2760 goto out;
2761 }
2762
2763 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
2764 {
2765 int err = -1;
2766 struct evsel *sys_exit;
2767 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2768 trace->ev_qualifier_ids.nr,
2769 trace->ev_qualifier_ids.entries);
2770
2771 if (filter == NULL)
2772 goto out_enomem;
2773
2774 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2775 filter)) {
2776 sys_exit = trace->syscalls.events.sys_exit;
2777 err = perf_evsel__append_tp_filter(sys_exit, filter);
2778 }
2779
2780 free(filter);
2781 out:
2782 return err;
2783 out_enomem:
2784 errno = ENOMEM;
2785 goto out;
2786 }
2787
2788 #ifdef HAVE_LIBBPF_SUPPORT
2789 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
2790 {
2791 if (trace->bpf_obj == NULL)
2792 return NULL;
2793
2794 return bpf_object__find_program_by_title(trace->bpf_obj, name);
2795 }
2796
2797 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
2798 const char *prog_name, const char *type)
2799 {
2800 struct bpf_program *prog;
2801
2802 if (prog_name == NULL) {
2803 char default_prog_name[256];
2804 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
2805 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
2806 if (prog != NULL)
2807 goto out_found;
2808 if (sc->fmt && sc->fmt->alias) {
2809 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
2810 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
2811 if (prog != NULL)
2812 goto out_found;
2813 }
2814 goto out_unaugmented;
2815 }
2816
2817 prog = trace__find_bpf_program_by_title(trace, prog_name);
2818
2819 if (prog != NULL) {
2820 out_found:
2821 return prog;
2822 }
2823
2824 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
2825 prog_name, type, sc->name);
2826 out_unaugmented:
2827 return trace->syscalls.unaugmented_prog;
2828 }
2829
2830 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
2831 {
2832 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2833
2834 if (sc == NULL)
2835 return;
2836
2837 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
2838 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
2839 }
2840
2841 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
2842 {
2843 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2844 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
2845 }
2846
2847 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
2848 {
2849 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2850 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
2851 }
2852
2853 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
2854 {
2855 struct syscall *sc = trace__syscall_info(trace, NULL, id);
2856 int arg = 0;
2857
2858 if (sc == NULL)
2859 goto out;
2860
2861 for (; arg < sc->nr_args; ++arg) {
2862 entry->string_args_len[arg] = 0;
2863 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
2864 /* Should be set like strace -s strsize */
2865 entry->string_args_len[arg] = PATH_MAX;
2866 }
2867 }
2868 out:
2869 for (; arg < 6; ++arg)
2870 entry->string_args_len[arg] = 0;
2871 }
2872 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
2873 {
2874 int fd = bpf_map__fd(trace->syscalls.map);
2875 struct bpf_map_syscall_entry value = {
2876 .enabled = !trace->not_ev_qualifier,
2877 };
2878 int err = 0;
2879 size_t i;
2880
2881 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
2882 int key = trace->ev_qualifier_ids.entries[i];
2883
2884 if (value.enabled) {
2885 trace__init_bpf_map_syscall_args(trace, key, &value);
2886 trace__init_syscall_bpf_progs(trace, key);
2887 }
2888
2889 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
2890 if (err)
2891 break;
2892 }
2893
2894 return err;
2895 }
2896
2897 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
2898 {
2899 int fd = bpf_map__fd(trace->syscalls.map);
2900 struct bpf_map_syscall_entry value = {
2901 .enabled = enabled,
2902 };
2903 int err = 0, key;
2904
2905 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
2906 if (enabled)
2907 trace__init_bpf_map_syscall_args(trace, key, &value);
2908
2909 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
2910 if (err)
2911 break;
2912 }
2913
2914 return err;
2915 }
2916
2917 static int trace__init_syscalls_bpf_map(struct trace *trace)
2918 {
2919 bool enabled = true;
2920
2921 if (trace->ev_qualifier_ids.nr)
2922 enabled = trace->not_ev_qualifier;
2923
2924 return __trace__init_syscalls_bpf_map(trace, enabled);
2925 }
2926
2927 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
2928 {
2929 struct tep_format_field *field, *candidate_field;
2930 int id;
2931
2932 /*
2933 * We're only interested in syscalls that have a pointer:
2934 */
2935 for (field = sc->args; field; field = field->next) {
2936 if (field->flags & TEP_FIELD_IS_POINTER)
2937 goto try_to_find_pair;
2938 }
2939
2940 return NULL;
2941
2942 try_to_find_pair:
2943 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
2944 struct syscall *pair = trace__syscall_info(trace, NULL, id);
2945 struct bpf_program *pair_prog;
2946 bool is_candidate = false;
2947
2948 if (pair == NULL || pair == sc ||
2949 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
2950 continue;
2951
2952 for (field = sc->args, candidate_field = pair->args;
2953 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
2954 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
2955 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
2956
2957 if (is_pointer) {
2958 if (!candidate_is_pointer) {
2959 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
2960 continue;
2961 }
2962 } else {
2963 if (candidate_is_pointer) {
2964 // The candidate might copy a pointer we don't have, skip it.
2965 goto next_candidate;
2966 }
2967 continue;
2968 }
2969
2970 if (strcmp(field->type, candidate_field->type))
2971 goto next_candidate;
2972
2973 is_candidate = true;
2974 }
2975
2976 if (!is_candidate)
2977 goto next_candidate;
2978
2979 /*
2980 * Check if the tentative pair syscall augmenter has more pointers, if it has,
2981 * then it may be collecting that and we then can't use it, as it would collect
2982 * more than what is common to the two syscalls.
2983 */
2984 if (candidate_field) {
2985 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
2986 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
2987 goto next_candidate;
2988 }
2989
2990 pair_prog = pair->bpf_prog.sys_enter;
2991 /*
2992 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
2993 * have been searched for, so search it here and if it returns the
2994 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
2995 * program for a filtered syscall on a non-filtered one.
2996 *
2997 * For instance, we have "!syscalls:sys_enter_renameat" and that is
2998 * useful for "renameat2".
2999 */
3000 if (pair_prog == NULL) {
3001 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3002 if (pair_prog == trace->syscalls.unaugmented_prog)
3003 goto next_candidate;
3004 }
3005
3006 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3007 return pair_prog;
3008 next_candidate:
3009 continue;
3010 }
3011
3012 return NULL;
3013 }
3014
3015 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3016 {
3017 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3018 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3019 int err = 0, key;
3020
3021 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3022 int prog_fd;
3023
3024 if (!trace__syscall_enabled(trace, key))
3025 continue;
3026
3027 trace__init_syscall_bpf_progs(trace, key);
3028
3029 // It'll get at least the "!raw_syscalls:unaugmented"
3030 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3031 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3032 if (err)
3033 break;
3034 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3035 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3036 if (err)
3037 break;
3038 }
3039
3040 /*
3041 * Now lets do a second pass looking for enabled syscalls without
3042 * an augmenter that have a signature that is a superset of another
3043 * syscall with an augmenter so that we can auto-reuse it.
3044 *
3045 * I.e. if we have an augmenter for the "open" syscall that has
3046 * this signature:
3047 *
3048 * int open(const char *pathname, int flags, mode_t mode);
3049 *
3050 * I.e. that will collect just the first string argument, then we
3051 * can reuse it for the 'creat' syscall, that has this signature:
3052 *
3053 * int creat(const char *pathname, mode_t mode);
3054 *
3055 * and for:
3056 *
3057 * int stat(const char *pathname, struct stat *statbuf);
3058 * int lstat(const char *pathname, struct stat *statbuf);
3059 *
3060 * Because the 'open' augmenter will collect the first arg as a string,
3061 * and leave alone all the other args, which already helps with
3062 * beautifying 'stat' and 'lstat''s pathname arg.
3063 *
3064 * Then, in time, when 'stat' gets an augmenter that collects both
3065 * first and second arg (this one on the raw_syscalls:sys_exit prog
3066 * array tail call, then that one will be used.
3067 */
3068 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3069 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3070 struct bpf_program *pair_prog;
3071 int prog_fd;
3072
3073 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3074 continue;
3075
3076 /*
3077 * For now we're just reusing the sys_enter prog, and if it
3078 * already has an augmenter, we don't need to find one.
3079 */
3080 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3081 continue;
3082
3083 /*
3084 * Look at all the other syscalls for one that has a signature
3085 * that is close enough that we can share:
3086 */
3087 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3088 if (pair_prog == NULL)
3089 continue;
3090
3091 sc->bpf_prog.sys_enter = pair_prog;
3092
3093 /*
3094 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3095 * with the fd for the program we're reusing:
3096 */
3097 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3098 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3099 if (err)
3100 break;
3101 }
3102
3103
3104 return err;
3105 }
3106 #else
3107 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3108 {
3109 return 0;
3110 }
3111
3112 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3113 {
3114 return 0;
3115 }
3116
3117 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3118 const char *name __maybe_unused)
3119 {
3120 return NULL;
3121 }
3122
3123 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3124 {
3125 return 0;
3126 }
3127 #endif // HAVE_LIBBPF_SUPPORT
3128
3129 static int trace__set_ev_qualifier_filter(struct trace *trace)
3130 {
3131 if (trace->syscalls.map)
3132 return trace__set_ev_qualifier_bpf_filter(trace);
3133 if (trace->syscalls.events.sys_enter)
3134 return trace__set_ev_qualifier_tp_filter(trace);
3135 return 0;
3136 }
3137
3138 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3139 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3140 {
3141 int err = 0;
3142 #ifdef HAVE_LIBBPF_SUPPORT
3143 bool value = true;
3144 int map_fd = bpf_map__fd(map);
3145 size_t i;
3146
3147 for (i = 0; i < npids; ++i) {
3148 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3149 if (err)
3150 break;
3151 }
3152 #endif
3153 return err;
3154 }
3155
3156 static int trace__set_filter_loop_pids(struct trace *trace)
3157 {
3158 unsigned int nr = 1, err;
3159 pid_t pids[32] = {
3160 getpid(),
3161 };
3162 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3163
3164 while (thread && nr < ARRAY_SIZE(pids)) {
3165 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3166
3167 if (parent == NULL)
3168 break;
3169
3170 if (!strcmp(thread__comm_str(parent), "sshd") ||
3171 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3172 pids[nr++] = parent->tid;
3173 break;
3174 }
3175 thread = parent;
3176 }
3177
3178 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids);
3179 if (!err && trace->filter_pids.map)
3180 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3181
3182 return err;
3183 }
3184
3185 static int trace__set_filter_pids(struct trace *trace)
3186 {
3187 int err = 0;
3188 /*
3189 * Better not use !target__has_task() here because we need to cover the
3190 * case where no threads were specified in the command line, but a
3191 * workload was, and in that case we will fill in the thread_map when
3192 * we fork the workload in perf_evlist__prepare_workload.
3193 */
3194 if (trace->filter_pids.nr > 0) {
3195 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3196 trace->filter_pids.entries);
3197 if (!err && trace->filter_pids.map) {
3198 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3199 trace->filter_pids.entries);
3200 }
3201 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3202 err = trace__set_filter_loop_pids(trace);
3203 }
3204
3205 return err;
3206 }
3207
3208 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3209 {
3210 struct evlist *evlist = trace->evlist;
3211 struct perf_sample sample;
3212 int err;
3213
3214 err = perf_evlist__parse_sample(evlist, event, &sample);
3215 if (err)
3216 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3217 else
3218 trace__handle_event(trace, event, &sample);
3219
3220 return 0;
3221 }
3222
3223 static int __trace__flush_events(struct trace *trace)
3224 {
3225 u64 first = ordered_events__first_time(&trace->oe.data);
3226 u64 flush = trace->oe.last - NSEC_PER_SEC;
3227
3228 /* Is there some thing to flush.. */
3229 if (first && first < flush)
3230 return ordered_events__flush_time(&trace->oe.data, flush);
3231
3232 return 0;
3233 }
3234
3235 static int trace__flush_events(struct trace *trace)
3236 {
3237 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3238 }
3239
3240 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3241 {
3242 int err;
3243
3244 if (!trace->sort_events)
3245 return __trace__deliver_event(trace, event);
3246
3247 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3248 if (err && err != -1)
3249 return err;
3250
3251 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3252 if (err)
3253 return err;
3254
3255 return trace__flush_events(trace);
3256 }
3257
3258 static int ordered_events__deliver_event(struct ordered_events *oe,
3259 struct ordered_event *event)
3260 {
3261 struct trace *trace = container_of(oe, struct trace, oe.data);
3262
3263 return __trace__deliver_event(trace, event->event);
3264 }
3265
3266 static int trace__run(struct trace *trace, int argc, const char **argv)
3267 {
3268 struct evlist *evlist = trace->evlist;
3269 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3270 int err = -1, i;
3271 unsigned long before;
3272 const bool forks = argc > 0;
3273 bool draining = false;
3274
3275 trace->live = true;
3276
3277 if (!trace->raw_augmented_syscalls) {
3278 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3279 goto out_error_raw_syscalls;
3280
3281 if (trace->trace_syscalls)
3282 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3283 }
3284
3285 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3286 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3287 if (pgfault_maj == NULL)
3288 goto out_error_mem;
3289 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3290 evlist__add(evlist, pgfault_maj);
3291 }
3292
3293 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3294 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3295 if (pgfault_min == NULL)
3296 goto out_error_mem;
3297 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3298 evlist__add(evlist, pgfault_min);
3299 }
3300
3301 if (trace->sched &&
3302 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
3303 trace__sched_stat_runtime))
3304 goto out_error_sched_stat_runtime;
3305
3306 /*
3307 * If a global cgroup was set, apply it to all the events without an
3308 * explicit cgroup. I.e.:
3309 *
3310 * trace -G A -e sched:*switch
3311 *
3312 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3313 * _and_ sched:sched_switch to the 'A' cgroup, while:
3314 *
3315 * trace -e sched:*switch -G A
3316 *
3317 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3318 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3319 * a cgroup (on the root cgroup, sys wide, etc).
3320 *
3321 * Multiple cgroups:
3322 *
3323 * trace -G A -e sched:*switch -G B
3324 *
3325 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3326 * to the 'B' cgroup.
3327 *
3328 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3329 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3330 */
3331 if (trace->cgroup)
3332 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3333
3334 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3335 if (err < 0) {
3336 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3337 goto out_delete_evlist;
3338 }
3339
3340 err = trace__symbols_init(trace, evlist);
3341 if (err < 0) {
3342 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3343 goto out_delete_evlist;
3344 }
3345
3346 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3347
3348 signal(SIGCHLD, sig_handler);
3349 signal(SIGINT, sig_handler);
3350
3351 if (forks) {
3352 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3353 argv, false, NULL);
3354 if (err < 0) {
3355 fprintf(trace->output, "Couldn't run the workload!\n");
3356 goto out_delete_evlist;
3357 }
3358 }
3359
3360 err = evlist__open(evlist);
3361 if (err < 0)
3362 goto out_error_open;
3363
3364 err = bpf__apply_obj_config();
3365 if (err) {
3366 char errbuf[BUFSIZ];
3367
3368 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3369 pr_err("ERROR: Apply config to BPF failed: %s\n",
3370 errbuf);
3371 goto out_error_open;
3372 }
3373
3374 err = trace__set_filter_pids(trace);
3375 if (err < 0)
3376 goto out_error_mem;
3377
3378 if (trace->syscalls.map)
3379 trace__init_syscalls_bpf_map(trace);
3380
3381 if (trace->syscalls.prog_array.sys_enter)
3382 trace__init_syscalls_bpf_prog_array_maps(trace);
3383
3384 if (trace->ev_qualifier_ids.nr > 0) {
3385 err = trace__set_ev_qualifier_filter(trace);
3386 if (err < 0)
3387 goto out_errno;
3388
3389 if (trace->syscalls.events.sys_exit) {
3390 pr_debug("event qualifier tracepoint filter: %s\n",
3391 trace->syscalls.events.sys_exit->filter);
3392 }
3393 }
3394
3395 /*
3396 * If the "close" syscall is not traced, then we will not have the
3397 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3398 * fd->pathname table and were ending up showing the last value set by
3399 * syscalls opening a pathname and associating it with a descriptor or
3400 * reading it from /proc/pid/fd/ in cases where that doesn't make
3401 * sense.
3402 *
3403 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3404 * not in use.
3405 */
3406 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3407
3408 err = perf_evlist__apply_filters(evlist, &evsel);
3409 if (err < 0)
3410 goto out_error_apply_filters;
3411
3412 if (trace->dump.map)
3413 bpf_map__fprintf(trace->dump.map, trace->output);
3414
3415 err = evlist__mmap(evlist, trace->opts.mmap_pages);
3416 if (err < 0)
3417 goto out_error_mmap;
3418
3419 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3420 evlist__enable(evlist);
3421
3422 if (forks)
3423 perf_evlist__start_workload(evlist);
3424
3425 if (trace->opts.initial_delay) {
3426 usleep(trace->opts.initial_delay * 1000);
3427 evlist__enable(evlist);
3428 }
3429
3430 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3431 evlist->core.threads->nr > 1 ||
3432 evlist__first(evlist)->core.attr.inherit;
3433
3434 /*
3435 * Now that we already used evsel->core.attr to ask the kernel to setup the
3436 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
3437 * trace__resolve_callchain(), allowing per-event max-stack settings
3438 * to override an explicitly set --max-stack global setting.
3439 */
3440 evlist__for_each_entry(evlist, evsel) {
3441 if (evsel__has_callchain(evsel) &&
3442 evsel->core.attr.sample_max_stack == 0)
3443 evsel->core.attr.sample_max_stack = trace->max_stack;
3444 }
3445 again:
3446 before = trace->nr_events;
3447
3448 for (i = 0; i < evlist->core.nr_mmaps; i++) {
3449 union perf_event *event;
3450 struct mmap *md;
3451
3452 md = &evlist->mmap[i];
3453 if (perf_mmap__read_init(md) < 0)
3454 continue;
3455
3456 while ((event = perf_mmap__read_event(md)) != NULL) {
3457 ++trace->nr_events;
3458
3459 err = trace__deliver_event(trace, event);
3460 if (err)
3461 goto out_disable;
3462
3463 perf_mmap__consume(md);
3464
3465 if (interrupted)
3466 goto out_disable;
3467
3468 if (done && !draining) {
3469 evlist__disable(evlist);
3470 draining = true;
3471 }
3472 }
3473 perf_mmap__read_done(md);
3474 }
3475
3476 if (trace->nr_events == before) {
3477 int timeout = done ? 100 : -1;
3478
3479 if (!draining && evlist__poll(evlist, timeout) > 0) {
3480 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
3481 draining = true;
3482
3483 goto again;
3484 } else {
3485 if (trace__flush_events(trace))
3486 goto out_disable;
3487 }
3488 } else {
3489 goto again;
3490 }
3491
3492 out_disable:
3493 thread__zput(trace->current);
3494
3495 evlist__disable(evlist);
3496
3497 if (trace->sort_events)
3498 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
3499
3500 if (!err) {
3501 if (trace->summary)
3502 trace__fprintf_thread_summary(trace, trace->output);
3503
3504 if (trace->show_tool_stats) {
3505 fprintf(trace->output, "Stats:\n "
3506 " vfs_getname : %" PRIu64 "\n"
3507 " proc_getname: %" PRIu64 "\n",
3508 trace->stats.vfs_getname,
3509 trace->stats.proc_getname);
3510 }
3511 }
3512
3513 out_delete_evlist:
3514 trace__symbols__exit(trace);
3515
3516 evlist__delete(evlist);
3517 cgroup__put(trace->cgroup);
3518 trace->evlist = NULL;
3519 trace->live = false;
3520 return err;
3521 {
3522 char errbuf[BUFSIZ];
3523
3524 out_error_sched_stat_runtime:
3525 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
3526 goto out_error;
3527
3528 out_error_raw_syscalls:
3529 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
3530 goto out_error;
3531
3532 out_error_mmap:
3533 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
3534 goto out_error;
3535
3536 out_error_open:
3537 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
3538
3539 out_error:
3540 fprintf(trace->output, "%s\n", errbuf);
3541 goto out_delete_evlist;
3542
3543 out_error_apply_filters:
3544 fprintf(trace->output,
3545 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
3546 evsel->filter, perf_evsel__name(evsel), errno,
3547 str_error_r(errno, errbuf, sizeof(errbuf)));
3548 goto out_delete_evlist;
3549 }
3550 out_error_mem:
3551 fprintf(trace->output, "Not enough memory to run!\n");
3552 goto out_delete_evlist;
3553
3554 out_errno:
3555 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
3556 goto out_delete_evlist;
3557 }
3558
3559 static int trace__replay(struct trace *trace)
3560 {
3561 const struct evsel_str_handler handlers[] = {
3562 { "probe:vfs_getname", trace__vfs_getname, },
3563 };
3564 struct perf_data data = {
3565 .path = input_name,
3566 .mode = PERF_DATA_MODE_READ,
3567 .force = trace->force,
3568 };
3569 struct perf_session *session;
3570 struct evsel *evsel;
3571 int err = -1;
3572
3573 trace->tool.sample = trace__process_sample;
3574 trace->tool.mmap = perf_event__process_mmap;
3575 trace->tool.mmap2 = perf_event__process_mmap2;
3576 trace->tool.comm = perf_event__process_comm;
3577 trace->tool.exit = perf_event__process_exit;
3578 trace->tool.fork = perf_event__process_fork;
3579 trace->tool.attr = perf_event__process_attr;
3580 trace->tool.tracing_data = perf_event__process_tracing_data;
3581 trace->tool.build_id = perf_event__process_build_id;
3582 trace->tool.namespaces = perf_event__process_namespaces;
3583
3584 trace->tool.ordered_events = true;
3585 trace->tool.ordering_requires_timestamps = true;
3586
3587 /* add tid to output */
3588 trace->multiple_threads = true;
3589
3590 session = perf_session__new(&data, false, &trace->tool);
3591 if (IS_ERR(session))
3592 return PTR_ERR(session);
3593
3594 if (trace->opts.target.pid)
3595 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
3596
3597 if (trace->opts.target.tid)
3598 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
3599
3600 if (symbol__init(&session->header.env) < 0)
3601 goto out;
3602
3603 trace->host = &session->machines.host;
3604
3605 err = perf_session__set_tracepoints_handlers(session, handlers);
3606 if (err)
3607 goto out;
3608
3609 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3610 "raw_syscalls:sys_enter");
3611 /* older kernels have syscalls tp versus raw_syscalls */
3612 if (evsel == NULL)
3613 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3614 "syscalls:sys_enter");
3615
3616 if (evsel &&
3617 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
3618 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
3619 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
3620 goto out;
3621 }
3622
3623 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3624 "raw_syscalls:sys_exit");
3625 if (evsel == NULL)
3626 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3627 "syscalls:sys_exit");
3628 if (evsel &&
3629 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
3630 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
3631 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
3632 goto out;
3633 }
3634
3635 evlist__for_each_entry(session->evlist, evsel) {
3636 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
3637 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
3638 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
3639 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
3640 evsel->handler = trace__pgfault;
3641 }
3642
3643 setup_pager();
3644
3645 err = perf_session__process_events(session);
3646 if (err)
3647 pr_err("Failed to process events, error %d", err);
3648
3649 else if (trace->summary)
3650 trace__fprintf_thread_summary(trace, trace->output);
3651
3652 out:
3653 perf_session__delete(session);
3654
3655 return err;
3656 }
3657
3658 static size_t trace__fprintf_threads_header(FILE *fp)
3659 {
3660 size_t printed;
3661
3662 printed = fprintf(fp, "\n Summary of events:\n\n");
3663
3664 return printed;
3665 }
3666
3667 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
3668 struct stats *stats;
3669 double msecs;
3670 int syscall;
3671 )
3672 {
3673 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
3674 struct stats *stats = source->priv;
3675
3676 entry->syscall = source->i;
3677 entry->stats = stats;
3678 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
3679 }
3680
3681 static size_t thread__dump_stats(struct thread_trace *ttrace,
3682 struct trace *trace, FILE *fp)
3683 {
3684 size_t printed = 0;
3685 struct syscall *sc;
3686 struct rb_node *nd;
3687 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
3688
3689 if (syscall_stats == NULL)
3690 return 0;
3691
3692 printed += fprintf(fp, "\n");
3693
3694 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
3695 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
3696 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
3697
3698 resort_rb__for_each_entry(nd, syscall_stats) {
3699 struct stats *stats = syscall_stats_entry->stats;
3700 if (stats) {
3701 double min = (double)(stats->min) / NSEC_PER_MSEC;
3702 double max = (double)(stats->max) / NSEC_PER_MSEC;
3703 double avg = avg_stats(stats);
3704 double pct;
3705 u64 n = (u64) stats->n;
3706
3707 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
3708 avg /= NSEC_PER_MSEC;
3709
3710 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
3711 printed += fprintf(fp, " %-15s", sc->name);
3712 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
3713 n, syscall_stats_entry->msecs, min, avg);
3714 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
3715 }
3716 }
3717
3718 resort_rb__delete(syscall_stats);
3719 printed += fprintf(fp, "\n\n");
3720
3721 return printed;
3722 }
3723
3724 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
3725 {
3726 size_t printed = 0;
3727 struct thread_trace *ttrace = thread__priv(thread);
3728 double ratio;
3729
3730 if (ttrace == NULL)
3731 return 0;
3732
3733 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
3734
3735 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
3736 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
3737 printed += fprintf(fp, "%.1f%%", ratio);
3738 if (ttrace->pfmaj)
3739 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
3740 if (ttrace->pfmin)
3741 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
3742 if (trace->sched)
3743 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
3744 else if (fputc('\n', fp) != EOF)
3745 ++printed;
3746
3747 printed += thread__dump_stats(ttrace, trace, fp);
3748
3749 return printed;
3750 }
3751
3752 static unsigned long thread__nr_events(struct thread_trace *ttrace)
3753 {
3754 return ttrace ? ttrace->nr_events : 0;
3755 }
3756
3757 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
3758 struct thread *thread;
3759 )
3760 {
3761 entry->thread = rb_entry(nd, struct thread, rb_node);
3762 }
3763
3764 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
3765 {
3766 size_t printed = trace__fprintf_threads_header(fp);
3767 struct rb_node *nd;
3768 int i;
3769
3770 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
3771 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
3772
3773 if (threads == NULL) {
3774 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
3775 return 0;
3776 }
3777
3778 resort_rb__for_each_entry(nd, threads)
3779 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
3780
3781 resort_rb__delete(threads);
3782 }
3783 return printed;
3784 }
3785
3786 static int trace__set_duration(const struct option *opt, const char *str,
3787 int unset __maybe_unused)
3788 {
3789 struct trace *trace = opt->value;
3790
3791 trace->duration_filter = atof(str);
3792 return 0;
3793 }
3794
3795 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
3796 int unset __maybe_unused)
3797 {
3798 int ret = -1;
3799 size_t i;
3800 struct trace *trace = opt->value;
3801 /*
3802 * FIXME: introduce a intarray class, plain parse csv and create a
3803 * { int nr, int entries[] } struct...
3804 */
3805 struct intlist *list = intlist__new(str);
3806
3807 if (list == NULL)
3808 return -1;
3809
3810 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
3811 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
3812
3813 if (trace->filter_pids.entries == NULL)
3814 goto out;
3815
3816 trace->filter_pids.entries[0] = getpid();
3817
3818 for (i = 1; i < trace->filter_pids.nr; ++i)
3819 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
3820
3821 intlist__delete(list);
3822 ret = 0;
3823 out:
3824 return ret;
3825 }
3826
3827 static int trace__open_output(struct trace *trace, const char *filename)
3828 {
3829 struct stat st;
3830
3831 if (!stat(filename, &st) && st.st_size) {
3832 char oldname[PATH_MAX];
3833
3834 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
3835 unlink(oldname);
3836 rename(filename, oldname);
3837 }
3838
3839 trace->output = fopen(filename, "w");
3840
3841 return trace->output == NULL ? -errno : 0;
3842 }
3843
3844 static int parse_pagefaults(const struct option *opt, const char *str,
3845 int unset __maybe_unused)
3846 {
3847 int *trace_pgfaults = opt->value;
3848
3849 if (strcmp(str, "all") == 0)
3850 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
3851 else if (strcmp(str, "maj") == 0)
3852 *trace_pgfaults |= TRACE_PFMAJ;
3853 else if (strcmp(str, "min") == 0)
3854 *trace_pgfaults |= TRACE_PFMIN;
3855 else
3856 return -1;
3857
3858 return 0;
3859 }
3860
3861 static void evlist__set_evsel_handler(struct evlist *evlist, void *handler)
3862 {
3863 struct evsel *evsel;
3864
3865 evlist__for_each_entry(evlist, evsel)
3866 evsel->handler = handler;
3867 }
3868
3869 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
3870 {
3871 struct evsel *evsel;
3872
3873 evlist__for_each_entry(evlist, evsel) {
3874 if (evsel->priv || !evsel->tp_format)
3875 continue;
3876
3877 if (strcmp(evsel->tp_format->system, "syscalls"))
3878 continue;
3879
3880 if (perf_evsel__init_syscall_tp(evsel))
3881 return -1;
3882
3883 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
3884 struct syscall_tp *sc = evsel->priv;
3885
3886 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
3887 return -1;
3888 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
3889 struct syscall_tp *sc = evsel->priv;
3890
3891 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
3892 return -1;
3893 }
3894 }
3895
3896 return 0;
3897 }
3898
3899 /*
3900 * XXX: Hackish, just splitting the combined -e+--event (syscalls
3901 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
3902 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
3903 *
3904 * It'd be better to introduce a parse_options() variant that would return a
3905 * list with the terms it didn't match to an event...
3906 */
3907 static int trace__parse_events_option(const struct option *opt, const char *str,
3908 int unset __maybe_unused)
3909 {
3910 struct trace *trace = (struct trace *)opt->value;
3911 const char *s = str;
3912 char *sep = NULL, *lists[2] = { NULL, NULL, };
3913 int len = strlen(str) + 1, err = -1, list, idx;
3914 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
3915 char group_name[PATH_MAX];
3916 struct syscall_fmt *fmt;
3917
3918 if (strace_groups_dir == NULL)
3919 return -1;
3920
3921 if (*s == '!') {
3922 ++s;
3923 trace->not_ev_qualifier = true;
3924 }
3925
3926 while (1) {
3927 if ((sep = strchr(s, ',')) != NULL)
3928 *sep = '\0';
3929
3930 list = 0;
3931 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
3932 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
3933 list = 1;
3934 goto do_concat;
3935 }
3936
3937 fmt = syscall_fmt__find_by_alias(s);
3938 if (fmt != NULL) {
3939 list = 1;
3940 s = fmt->name;
3941 } else {
3942 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
3943 if (access(group_name, R_OK) == 0)
3944 list = 1;
3945 }
3946 do_concat:
3947 if (lists[list]) {
3948 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
3949 } else {
3950 lists[list] = malloc(len);
3951 if (lists[list] == NULL)
3952 goto out;
3953 strcpy(lists[list], s);
3954 }
3955
3956 if (!sep)
3957 break;
3958
3959 *sep = ',';
3960 s = sep + 1;
3961 }
3962
3963 if (lists[1] != NULL) {
3964 struct strlist_config slist_config = {
3965 .dirname = strace_groups_dir,
3966 };
3967
3968 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
3969 if (trace->ev_qualifier == NULL) {
3970 fputs("Not enough memory to parse event qualifier", trace->output);
3971 goto out;
3972 }
3973
3974 if (trace__validate_ev_qualifier(trace))
3975 goto out;
3976 trace->trace_syscalls = true;
3977 }
3978
3979 err = 0;
3980
3981 if (lists[0]) {
3982 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3983 "event selector. use 'perf list' to list available events",
3984 parse_events_option);
3985 err = parse_events_option(&o, lists[0], 0);
3986 }
3987 out:
3988 if (sep)
3989 *sep = ',';
3990
3991 return err;
3992 }
3993
3994 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3995 {
3996 struct trace *trace = opt->value;
3997
3998 if (!list_empty(&trace->evlist->core.entries))
3999 return parse_cgroups(opt, str, unset);
4000
4001 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4002
4003 return 0;
4004 }
4005
4006 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
4007 {
4008 if (trace->bpf_obj == NULL)
4009 return NULL;
4010
4011 return bpf_object__find_map_by_name(trace->bpf_obj, name);
4012 }
4013
4014 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
4015 {
4016 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
4017 }
4018
4019 static void trace__set_bpf_map_syscalls(struct trace *trace)
4020 {
4021 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
4022 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
4023 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
4024 }
4025
4026 static int trace__config(const char *var, const char *value, void *arg)
4027 {
4028 struct trace *trace = arg;
4029 int err = 0;
4030
4031 if (!strcmp(var, "trace.add_events")) {
4032 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4033 "event selector. use 'perf list' to list available events",
4034 parse_events_option);
4035 /*
4036 * We can't propagate parse_event_option() return, as it is 1
4037 * for failure while perf_config() expects -1.
4038 */
4039 if (parse_events_option(&o, value, 0))
4040 err = -1;
4041 } else if (!strcmp(var, "trace.show_timestamp")) {
4042 trace->show_tstamp = perf_config_bool(var, value);
4043 } else if (!strcmp(var, "trace.show_duration")) {
4044 trace->show_duration = perf_config_bool(var, value);
4045 } else if (!strcmp(var, "trace.show_arg_names")) {
4046 trace->show_arg_names = perf_config_bool(var, value);
4047 if (!trace->show_arg_names)
4048 trace->show_zeros = true;
4049 } else if (!strcmp(var, "trace.show_zeros")) {
4050 bool new_show_zeros = perf_config_bool(var, value);
4051 if (!trace->show_arg_names && !new_show_zeros) {
4052 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4053 goto out;
4054 }
4055 trace->show_zeros = new_show_zeros;
4056 } else if (!strcmp(var, "trace.show_prefix")) {
4057 trace->show_string_prefix = perf_config_bool(var, value);
4058 } else if (!strcmp(var, "trace.no_inherit")) {
4059 trace->opts.no_inherit = perf_config_bool(var, value);
4060 } else if (!strcmp(var, "trace.args_alignment")) {
4061 int args_alignment = 0;
4062 if (perf_config_int(&args_alignment, var, value) == 0)
4063 trace->args_alignment = args_alignment;
4064 }
4065 out:
4066 return err;
4067 }
4068
4069 int cmd_trace(int argc, const char **argv)
4070 {
4071 const char *trace_usage[] = {
4072 "perf trace [<options>] [<command>]",
4073 "perf trace [<options>] -- <command> [<options>]",
4074 "perf trace record [<options>] [<command>]",
4075 "perf trace record [<options>] -- <command> [<options>]",
4076 NULL
4077 };
4078 struct trace trace = {
4079 .opts = {
4080 .target = {
4081 .uid = UINT_MAX,
4082 .uses_mmap = true,
4083 },
4084 .user_freq = UINT_MAX,
4085 .user_interval = ULLONG_MAX,
4086 .no_buffering = true,
4087 .mmap_pages = UINT_MAX,
4088 },
4089 .output = stderr,
4090 .show_comm = true,
4091 .show_tstamp = true,
4092 .show_duration = true,
4093 .show_arg_names = true,
4094 .args_alignment = 70,
4095 .trace_syscalls = false,
4096 .kernel_syscallchains = false,
4097 .max_stack = UINT_MAX,
4098 .max_events = ULONG_MAX,
4099 };
4100 const char *map_dump_str = NULL;
4101 const char *output_name = NULL;
4102 const struct option trace_options[] = {
4103 OPT_CALLBACK('e', "event", &trace, "event",
4104 "event/syscall selector. use 'perf list' to list available events",
4105 trace__parse_events_option),
4106 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4107 "show the thread COMM next to its id"),
4108 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4109 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4110 trace__parse_events_option),
4111 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4112 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4113 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4114 "trace events on existing process id"),
4115 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4116 "trace events on existing thread id"),
4117 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4118 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4119 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4120 "system-wide collection from all CPUs"),
4121 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4122 "list of cpus to monitor"),
4123 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4124 "child tasks do not inherit counters"),
4125 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4126 "number of mmap data pages",
4127 perf_evlist__parse_mmap_pages),
4128 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4129 "user to profile"),
4130 OPT_CALLBACK(0, "duration", &trace, "float",
4131 "show only events with duration > N.M ms",
4132 trace__set_duration),
4133 #ifdef HAVE_LIBBPF_SUPPORT
4134 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4135 #endif
4136 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4137 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4138 OPT_BOOLEAN('T', "time", &trace.full_time,
4139 "Show full timestamp, not time relative to first start"),
4140 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4141 "Show only syscalls that failed"),
4142 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4143 "Show only syscall summary with statistics"),
4144 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4145 "Show all syscalls and summary with statistics"),
4146 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4147 "Trace pagefaults", parse_pagefaults, "maj"),
4148 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4149 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4150 OPT_CALLBACK(0, "call-graph", &trace.opts,
4151 "record_mode[,record_size]", record_callchain_help,
4152 &record_parse_callchain_opt),
4153 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4154 "Show the kernel callchains on the syscall exit path"),
4155 OPT_ULONG(0, "max-events", &trace.max_events,
4156 "Set the maximum number of events to print, exit after that is reached. "),
4157 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4158 "Set the minimum stack depth when parsing the callchain, "
4159 "anything below the specified depth will be ignored."),
4160 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4161 "Set the maximum stack depth when parsing the callchain, "
4162 "anything beyond the specified depth will be ignored. "
4163 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4164 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4165 "Sort batch of events before processing, use if getting out of order events"),
4166 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4167 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4168 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4169 "per thread proc mmap processing timeout in ms"),
4170 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4171 trace__parse_cgroups),
4172 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
4173 "ms to wait before starting measurement after program "
4174 "start"),
4175 OPTS_EVSWITCH(&trace.evswitch),
4176 OPT_END()
4177 };
4178 bool __maybe_unused max_stack_user_set = true;
4179 bool mmap_pages_user_set = true;
4180 struct evsel *evsel;
4181 const char * const trace_subcommands[] = { "record", NULL };
4182 int err = -1;
4183 char bf[BUFSIZ];
4184
4185 signal(SIGSEGV, sighandler_dump_stack);
4186 signal(SIGFPE, sighandler_dump_stack);
4187
4188 trace.evlist = evlist__new();
4189 trace.sctbl = syscalltbl__new();
4190
4191 if (trace.evlist == NULL || trace.sctbl == NULL) {
4192 pr_err("Not enough memory to run!\n");
4193 err = -ENOMEM;
4194 goto out;
4195 }
4196
4197 /*
4198 * Parsing .perfconfig may entail creating a BPF event, that may need
4199 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4200 * is too small. This affects just this process, not touching the
4201 * global setting. If it fails we'll get something in 'perf trace -v'
4202 * to help diagnose the problem.
4203 */
4204 rlimit__bump_memlock();
4205
4206 err = perf_config(trace__config, &trace);
4207 if (err)
4208 goto out;
4209
4210 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4211 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4212
4213 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4214 usage_with_options_msg(trace_usage, trace_options,
4215 "cgroup monitoring only available in system-wide mode");
4216 }
4217
4218 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4219 if (IS_ERR(evsel)) {
4220 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4221 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4222 goto out;
4223 }
4224
4225 if (evsel) {
4226 trace.syscalls.events.augmented = evsel;
4227
4228 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4229 if (evsel == NULL) {
4230 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4231 goto out;
4232 }
4233
4234 if (evsel->bpf_obj == NULL) {
4235 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4236 goto out;
4237 }
4238
4239 trace.bpf_obj = evsel->bpf_obj;
4240
4241 trace__set_bpf_map_filtered_pids(&trace);
4242 trace__set_bpf_map_syscalls(&trace);
4243 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4244 }
4245
4246 err = bpf__setup_stdout(trace.evlist);
4247 if (err) {
4248 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4249 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4250 goto out;
4251 }
4252
4253 err = -1;
4254
4255 if (map_dump_str) {
4256 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4257 if (trace.dump.map == NULL) {
4258 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4259 goto out;
4260 }
4261 }
4262
4263 if (trace.trace_pgfaults) {
4264 trace.opts.sample_address = true;
4265 trace.opts.sample_time = true;
4266 }
4267
4268 if (trace.opts.mmap_pages == UINT_MAX)
4269 mmap_pages_user_set = false;
4270
4271 if (trace.max_stack == UINT_MAX) {
4272 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4273 max_stack_user_set = false;
4274 }
4275
4276 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4277 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4278 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4279 }
4280 #endif
4281
4282 if (callchain_param.enabled) {
4283 if (!mmap_pages_user_set && geteuid() == 0)
4284 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4285
4286 symbol_conf.use_callchain = true;
4287 }
4288
4289 if (trace.evlist->core.nr_entries > 0) {
4290 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
4291 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4292 perror("failed to set syscalls:* tracepoint fields");
4293 goto out;
4294 }
4295 }
4296
4297 if (trace.sort_events) {
4298 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4299 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4300 }
4301
4302 /*
4303 * If we are augmenting syscalls, then combine what we put in the
4304 * __augmented_syscalls__ BPF map with what is in the
4305 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4306 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4307 *
4308 * We'll switch to look at two BPF maps, one for sys_enter and the
4309 * other for sys_exit when we start augmenting the sys_exit paths with
4310 * buffers that are being copied from kernel to userspace, think 'read'
4311 * syscall.
4312 */
4313 if (trace.syscalls.events.augmented) {
4314 evlist__for_each_entry(trace.evlist, evsel) {
4315 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4316
4317 if (raw_syscalls_sys_exit) {
4318 trace.raw_augmented_syscalls = true;
4319 goto init_augmented_syscall_tp;
4320 }
4321
4322 if (trace.syscalls.events.augmented->priv == NULL &&
4323 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
4324 struct evsel *augmented = trace.syscalls.events.augmented;
4325 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
4326 perf_evsel__init_augmented_syscall_tp_args(augmented))
4327 goto out;
4328 /*
4329 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
4330 * Above we made sure we can get from the payload the tp fields
4331 * that we get from syscalls:sys_enter tracefs format file.
4332 */
4333 augmented->handler = trace__sys_enter;
4334 /*
4335 * Now we do the same for the *syscalls:sys_enter event so that
4336 * if we handle it directly, i.e. if the BPF prog returns 0 so
4337 * as not to filter it, then we'll handle it just like we would
4338 * for the BPF_OUTPUT one:
4339 */
4340 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) ||
4341 perf_evsel__init_augmented_syscall_tp_args(evsel))
4342 goto out;
4343 evsel->handler = trace__sys_enter;
4344 }
4345
4346 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
4347 struct syscall_tp *sc;
4348 init_augmented_syscall_tp:
4349 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
4350 goto out;
4351 sc = evsel->priv;
4352 /*
4353 * For now with BPF raw_augmented we hook into
4354 * raw_syscalls:sys_enter and there we get all
4355 * 6 syscall args plus the tracepoint common
4356 * fields and the syscall_nr (another long).
4357 * So we check if that is the case and if so
4358 * don't look after the sc->args_size but
4359 * always after the full raw_syscalls:sys_enter
4360 * payload, which is fixed.
4361 *
4362 * We'll revisit this later to pass
4363 * s->args_size to the BPF augmenter (now
4364 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
4365 * so that it copies only what we need for each
4366 * syscall, like what happens when we use
4367 * syscalls:sys_enter_NAME, so that we reduce
4368 * the kernel/userspace traffic to just what is
4369 * needed for each syscall.
4370 */
4371 if (trace.raw_augmented_syscalls)
4372 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
4373 perf_evsel__init_augmented_syscall_tp_ret(evsel);
4374 evsel->handler = trace__sys_exit;
4375 }
4376 }
4377 }
4378
4379 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
4380 return trace__record(&trace, argc-1, &argv[1]);
4381
4382 /* summary_only implies summary option, but don't overwrite summary if set */
4383 if (trace.summary_only)
4384 trace.summary = trace.summary_only;
4385
4386 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4387 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4388 trace.trace_syscalls = true;
4389 }
4390
4391 if (output_name != NULL) {
4392 err = trace__open_output(&trace, output_name);
4393 if (err < 0) {
4394 perror("failed to create output file");
4395 goto out;
4396 }
4397 }
4398
4399 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
4400 if (err)
4401 goto out_close;
4402
4403 err = target__validate(&trace.opts.target);
4404 if (err) {
4405 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4406 fprintf(trace.output, "%s", bf);
4407 goto out_close;
4408 }
4409
4410 err = target__parse_uid(&trace.opts.target);
4411 if (err) {
4412 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
4413 fprintf(trace.output, "%s", bf);
4414 goto out_close;
4415 }
4416
4417 if (!argc && target__none(&trace.opts.target))
4418 trace.opts.target.system_wide = true;
4419
4420 if (input_name)
4421 err = trace__replay(&trace);
4422 else
4423 err = trace__run(&trace, argc, argv);
4424
4425 out_close:
4426 if (output_name != NULL)
4427 fclose(trace.output);
4428 out:
4429 return err;
4430 }
Linux with added FPC-III support