4 * Builtin 'trace' command:
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.
10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
12 * Initially based on the 'trace' prototype by Thomas Gleixner:
14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
16 * Released under the GPL v2. (and only v2, not any later version)
19 #include <traceevent/event-parse.h>
20 #include <api/fs/tracing_path.h>
23 #include "util/cgroup.h"
24 #include "util/color.h"
25 #include "util/config.h"
26 #include "util/debug.h"
28 #include "util/event.h"
29 #include "util/evlist.h"
30 #include <subcmd/exec-cmd.h>
31 #include "util/machine.h"
32 #include "util/path.h"
33 #include "util/session.h"
34 #include "util/thread.h"
35 #include <subcmd/parse-options.h>
36 #include "util/strlist.h"
37 #include "util/intlist.h"
38 #include "util/thread_map.h"
39 #include "util/stat.h"
40 #include "trace/beauty/beauty.h"
41 #include "trace-event.h"
42 #include "util/parse-events.h"
43 #include "util/bpf-loader.h"
44 #include "callchain.h"
45 #include "print_binary.h"
47 #include "syscalltbl.h"
48 #include "rb_resort.h"
56 #include <linux/err.h>
57 #include <linux/filter.h>
58 #include <linux/kernel.h>
59 #include <linux/random.h>
60 #include <linux/stringify.h>
61 #include <linux/time64.h>
63 #include <sys/sysmacros.h>
65 #include "sane_ctype.h"
68 # define O_CLOEXEC 02000000
71 #ifndef F_LINUX_SPECIFIC_BASE
72 # define F_LINUX_SPECIFIC_BASE 1024
76 struct perf_tool tool;
77 struct syscalltbl *sctbl;
80 struct syscall *table;
83 struct perf_evsel *sys_enter,
88 struct record_opts opts;
89 struct perf_evlist *evlist;
91 struct thread *current;
92 struct cgroup *cgroup;
95 unsigned long nr_events;
96 unsigned long nr_events_printed;
97 unsigned long max_events;
98 struct strlist *ev_qualifier;
108 double duration_filter;
114 unsigned int max_stack;
115 unsigned int min_stack;
116 int raw_augmented_syscalls_args_size;
117 bool raw_augmented_syscalls;
119 bool not_ev_qualifier;
123 bool multiple_threads;
129 bool show_tool_stats;
131 bool kernel_syscallchains;
137 bool show_string_prefix;
142 struct ordered_events data;
150 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
151 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
155 #define TP_UINT_FIELD(bits) \
156 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
159 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
168 #define TP_UINT_FIELD__SWAPPED(bits) \
169 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
172 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
173 return bswap_##bits(value);\
176 TP_UINT_FIELD__SWAPPED(16);
177 TP_UINT_FIELD__SWAPPED(32);
178 TP_UINT_FIELD__SWAPPED(64);
180 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
182 field->offset = offset;
186 field->integer = tp_field__u8;
189 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
192 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
195 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
204 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
206 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
209 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
211 return sample->raw_data + field->offset;
214 static int __tp_field__init_ptr(struct tp_field *field, int offset)
216 field->offset = offset;
217 field->pointer = tp_field__ptr;
221 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
223 return __tp_field__init_ptr(field, format_field->offset);
229 struct tp_field args, ret;
233 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
234 struct tp_field *field,
237 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
239 if (format_field == NULL)
242 return tp_field__init_uint(field, format_field, evsel->needs_swap);
245 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
246 ({ struct syscall_tp *sc = evsel->priv;\
247 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
249 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
250 struct tp_field *field,
253 struct tep_format_field *format_field = perf_evsel__field(evsel, name);
255 if (format_field == NULL)
258 return tp_field__init_ptr(field, format_field);
261 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
262 ({ struct syscall_tp *sc = evsel->priv;\
263 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
265 static void perf_evsel__delete_priv(struct perf_evsel *evsel)
268 perf_evsel__delete(evsel);
271 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel)
273 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
275 if (evsel->priv != NULL) {
276 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
277 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
288 static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp)
290 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
292 if (evsel->priv != NULL) {
293 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
294 if (syscall_id == NULL)
295 syscall_id = perf_evsel__field(tp, "__syscall_nr");
296 if (syscall_id == NULL)
298 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
310 static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel)
312 struct syscall_tp *sc = evsel->priv;
314 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
317 static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel)
319 struct syscall_tp *sc = evsel->priv;
321 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
324 static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler)
326 evsel->priv = malloc(sizeof(struct syscall_tp));
327 if (evsel->priv != NULL) {
328 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
331 evsel->handler = handler;
342 static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
344 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
346 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
348 evsel = perf_evsel__newtp("syscalls", direction);
353 if (perf_evsel__init_raw_syscall_tp(evsel, handler))
359 perf_evsel__delete_priv(evsel);
363 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
364 ({ struct syscall_tp *fields = evsel->priv; \
365 fields->name.integer(&fields->name, sample); })
367 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
368 ({ struct syscall_tp *fields = evsel->priv; \
369 fields->name.pointer(&fields->name, sample); })
371 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
373 int idx = val - sa->offset;
375 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
376 size_t printed = scnprintf(bf, size, intfmt, val);
378 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
382 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
385 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
387 struct syscall_arg *arg)
389 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
392 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
393 struct syscall_arg *arg)
395 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
398 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
400 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
405 for (i = 0; i < sas->nr_entries; ++i) {
406 struct strarray *sa = sas->entries[i];
407 int idx = val - sa->offset;
409 if (idx >= 0 && idx < sa->nr_entries) {
410 if (sa->entries[idx] == NULL)
412 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
416 printed = scnprintf(bf, size, intfmt, val);
418 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
422 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
423 struct syscall_arg *arg)
425 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
429 #define AT_FDCWD -100
432 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
433 struct syscall_arg *arg)
436 const char *prefix = "AT_FD";
439 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
441 return syscall_arg__scnprintf_fd(bf, size, arg);
444 #define SCA_FDAT syscall_arg__scnprintf_fd_at
446 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
447 struct syscall_arg *arg);
449 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
451 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
453 return scnprintf(bf, size, "%#lx", arg->val);
456 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
459 return scnprintf(bf, size, "NULL");
460 return syscall_arg__scnprintf_hex(bf, size, arg);
463 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
465 return scnprintf(bf, size, "%d", arg->val);
468 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
470 return scnprintf(bf, size, "%ld", arg->val);
473 static const char *bpf_cmd[] = {
474 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
475 "MAP_GET_NEXT_KEY", "PROG_LOAD",
477 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
479 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
480 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
482 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
483 static DEFINE_STRARRAY(itimers, "ITIMER_");
485 static const char *keyctl_options[] = {
486 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
487 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
488 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
489 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
490 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
492 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
494 static const char *whences[] = { "SET", "CUR", "END",
502 static DEFINE_STRARRAY(whences, "SEEK_");
504 static const char *fcntl_cmds[] = {
505 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
506 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
507 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
510 static DEFINE_STRARRAY(fcntl_cmds, "F_");
512 static const char *fcntl_linux_specific_cmds[] = {
513 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
514 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
515 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
518 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
520 static struct strarray *fcntl_cmds_arrays[] = {
521 &strarray__fcntl_cmds,
522 &strarray__fcntl_linux_specific_cmds,
525 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
527 static const char *rlimit_resources[] = {
528 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
529 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
532 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
534 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
535 static DEFINE_STRARRAY(sighow, "SIG_");
537 static const char *clockid[] = {
538 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
539 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
540 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
542 static DEFINE_STRARRAY(clockid, "CLOCK_");
544 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
545 struct syscall_arg *arg)
547 bool show_prefix = arg->show_string_prefix;
548 const char *suffix = "_OK";
552 if (mode == F_OK) /* 0 */
553 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
555 if (mode & n##_OK) { \
556 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
566 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
571 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
573 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
574 struct syscall_arg *arg);
576 #define SCA_FILENAME syscall_arg__scnprintf_filename
578 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
579 struct syscall_arg *arg)
581 bool show_prefix = arg->show_string_prefix;
582 const char *prefix = "O_";
583 int printed = 0, flags = arg->val;
586 if (flags & O_##n) { \
587 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
596 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
601 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
603 #ifndef GRND_NONBLOCK
604 #define GRND_NONBLOCK 0x0001
607 #define GRND_RANDOM 0x0002
610 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
611 struct syscall_arg *arg)
613 bool show_prefix = arg->show_string_prefix;
614 const char *prefix = "GRND_";
615 int printed = 0, flags = arg->val;
618 if (flags & GRND_##n) { \
619 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
620 flags &= ~GRND_##n; \
628 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
633 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
635 #define STRARRAY(name, array) \
636 { .scnprintf = SCA_STRARRAY, \
637 .parm = &strarray__##array, }
639 #include "trace/beauty/arch_errno_names.c"
640 #include "trace/beauty/eventfd.c"
641 #include "trace/beauty/futex_op.c"
642 #include "trace/beauty/futex_val3.c"
643 #include "trace/beauty/mmap.c"
644 #include "trace/beauty/mode_t.c"
645 #include "trace/beauty/msg_flags.c"
646 #include "trace/beauty/open_flags.c"
647 #include "trace/beauty/perf_event_open.c"
648 #include "trace/beauty/pid.c"
649 #include "trace/beauty/sched_policy.c"
650 #include "trace/beauty/seccomp.c"
651 #include "trace/beauty/signum.c"
652 #include "trace/beauty/socket_type.c"
653 #include "trace/beauty/waitid_options.c"
655 struct syscall_arg_fmt {
656 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
657 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
663 static struct syscall_fmt {
666 struct syscall_arg_fmt arg[6];
673 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
674 { .name = "arch_prctl",
675 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
676 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
678 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, },
680 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
681 { .name = "brk", .hexret = true,
682 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
683 { .name = "clock_gettime",
684 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
685 { .name = "clone", .errpid = true, .nr_args = 5,
686 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
687 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
688 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
689 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
690 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
692 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
694 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, },
695 { .name = "epoll_ctl",
696 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
697 { .name = "eventfd2",
698 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
699 { .name = "fchmodat",
700 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
701 { .name = "fchownat",
702 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
704 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
705 .parm = &strarrays__fcntl_cmds_arrays,
706 .show_zero = true, },
707 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
709 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
710 { .name = "fstat", .alias = "newfstat", },
711 { .name = "fstatat", .alias = "newfstatat", },
713 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
714 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
715 { .name = "futimesat",
716 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
717 { .name = "getitimer",
718 .arg = { [0] = STRARRAY(which, itimers), }, },
719 { .name = "getpid", .errpid = true, },
720 { .name = "getpgid", .errpid = true, },
721 { .name = "getppid", .errpid = true, },
722 { .name = "getrandom",
723 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
724 { .name = "getrlimit",
725 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
726 { .name = "gettid", .errpid = true, },
729 #if defined(__i386__) || defined(__x86_64__)
731 * FIXME: Make this available to all arches.
733 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
734 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
736 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
738 { .name = "kcmp", .nr_args = 5,
739 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
740 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
741 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
742 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
743 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
745 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
747 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
749 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
751 .arg = { [2] = STRARRAY(whence, whences), }, },
752 { .name = "lstat", .alias = "newlstat", },
754 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
755 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
757 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
759 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
760 { .name = "mmap", .hexret = true,
761 /* The standard mmap maps to old_mmap on s390x */
762 #if defined(__s390x__)
765 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
766 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ },
767 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
769 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
770 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
771 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
772 { .name = "mprotect",
773 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
774 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
775 { .name = "mq_unlink",
776 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
777 { .name = "mremap", .hexret = true,
778 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
779 { .name = "name_to_handle_at",
780 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
781 { .name = "newfstatat",
782 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
784 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
785 { .name = "open_by_handle_at",
786 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
787 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
789 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
790 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
791 { .name = "perf_event_open",
792 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
793 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
794 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
796 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
797 { .name = "pkey_alloc",
798 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
799 { .name = "pkey_free",
800 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
801 { .name = "pkey_mprotect",
802 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
803 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
804 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
805 { .name = "poll", .timeout = true, },
806 { .name = "ppoll", .timeout = true, },
808 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
809 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
810 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
811 { .name = "pread", .alias = "pread64", },
812 { .name = "preadv", .alias = "pread", },
813 { .name = "prlimit64",
814 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
815 { .name = "pwrite", .alias = "pwrite64", },
816 { .name = "readlinkat",
817 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
818 { .name = "recvfrom",
819 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
820 { .name = "recvmmsg",
821 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
823 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
824 { .name = "renameat",
825 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
826 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
827 { .name = "renameat2",
828 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
829 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
830 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
831 { .name = "rt_sigaction",
832 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
833 { .name = "rt_sigprocmask",
834 .arg = { [0] = STRARRAY(how, sighow), }, },
835 { .name = "rt_sigqueueinfo",
836 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
837 { .name = "rt_tgsigqueueinfo",
838 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
839 { .name = "sched_setscheduler",
840 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
842 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
843 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
844 { .name = "select", .timeout = true, },
845 { .name = "sendmmsg",
846 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
848 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
850 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
851 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
852 { .name = "set_tid_address", .errpid = true, },
853 { .name = "setitimer",
854 .arg = { [0] = STRARRAY(which, itimers), }, },
855 { .name = "setrlimit",
856 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
858 .arg = { [0] = STRARRAY(family, socket_families),
859 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
860 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
861 { .name = "socketpair",
862 .arg = { [0] = STRARRAY(family, socket_families),
863 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
864 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
865 { .name = "stat", .alias = "newstat", },
867 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
868 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
869 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
871 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
873 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
874 { .name = "symlinkat",
875 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
877 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
879 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
880 { .name = "umount2", .alias = "umount",
881 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
882 { .name = "uname", .alias = "newuname", },
883 { .name = "unlinkat",
884 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
885 { .name = "utimensat",
886 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
887 { .name = "wait4", .errpid = true,
888 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
889 { .name = "waitid", .errpid = true,
890 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
893 static int syscall_fmt__cmp(const void *name, const void *fmtp)
895 const struct syscall_fmt *fmt = fmtp;
896 return strcmp(name, fmt->name);
899 static struct syscall_fmt *syscall_fmt__find(const char *name)
901 const int nmemb = ARRAY_SIZE(syscall_fmts);
902 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
905 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
907 int i, nmemb = ARRAY_SIZE(syscall_fmts);
909 for (i = 0; i < nmemb; ++i) {
910 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0)
911 return &syscall_fmts[i];
918 * is_exit: is this "exit" or "exit_group"?
919 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
920 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
923 struct tep_event *tp_format;
928 struct tep_format_field *args;
930 struct syscall_fmt *fmt;
931 struct syscall_arg_fmt *arg_fmt;
934 struct bpf_map_syscall_entry {
939 * We need to have this 'calculated' boolean because in some cases we really
940 * don't know what is the duration of a syscall, for instance, when we start
941 * a session and some threads are waiting for a syscall to finish, say 'poll',
942 * in which case all we can do is to print "( ? ) for duration and for the
945 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
947 double duration = (double)t / NSEC_PER_MSEC;
948 size_t printed = fprintf(fp, "(");
951 printed += fprintf(fp, " ");
952 else if (duration >= 1.0)
953 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
954 else if (duration >= 0.01)
955 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
957 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
958 return printed + fprintf(fp, "): ");
962 * filename.ptr: The filename char pointer that will be vfs_getname'd
963 * filename.entry_str_pos: Where to insert the string translated from
964 * filename.ptr by the vfs_getname tracepoint/kprobe.
965 * ret_scnprintf: syscall args may set this to a different syscall return
966 * formatter, for instance, fcntl may return fds, file flags, etc.
968 struct thread_trace {
971 unsigned long nr_events;
972 unsigned long pfmaj, pfmin;
975 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
978 short int entry_str_pos;
980 unsigned int namelen;
988 struct intlist *syscall_stats;
991 static struct thread_trace *thread_trace__new(void)
993 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
996 ttrace->files.max = -1;
998 ttrace->syscall_stats = intlist__new(NULL);
1003 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1005 struct thread_trace *ttrace;
1010 if (thread__priv(thread) == NULL)
1011 thread__set_priv(thread, thread_trace__new());
1013 if (thread__priv(thread) == NULL)
1016 ttrace = thread__priv(thread);
1017 ++ttrace->nr_events;
1021 color_fprintf(fp, PERF_COLOR_RED,
1022 "WARNING: not enough memory, dropping samples!\n");
1027 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1028 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1030 struct thread_trace *ttrace = thread__priv(arg->thread);
1032 ttrace->ret_scnprintf = ret_scnprintf;
1035 #define TRACE_PFMAJ (1 << 0)
1036 #define TRACE_PFMIN (1 << 1)
1038 static const size_t trace__entry_str_size = 2048;
1040 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1042 if (fd > ttrace->files.max) {
1043 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1048 if (ttrace->files.max != -1) {
1049 memset(nfiles + ttrace->files.max + 1, 0,
1050 (fd - ttrace->files.max) * sizeof(struct file));
1052 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1055 ttrace->files.table = nfiles;
1056 ttrace->files.max = fd;
1059 return ttrace->files.table + fd;
1062 struct file *thread__files_entry(struct thread *thread, int fd)
1064 return thread_trace__files_entry(thread__priv(thread), fd);
1067 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1069 struct thread_trace *ttrace = thread__priv(thread);
1070 struct file *file = thread_trace__files_entry(ttrace, fd);
1074 if (stat(pathname, &st) == 0)
1075 file->dev_maj = major(st.st_rdev);
1076 file->pathname = strdup(pathname);
1084 static int thread__read_fd_path(struct thread *thread, int fd)
1086 char linkname[PATH_MAX], pathname[PATH_MAX];
1090 if (thread->pid_ == thread->tid) {
1091 scnprintf(linkname, sizeof(linkname),
1092 "/proc/%d/fd/%d", thread->pid_, fd);
1094 scnprintf(linkname, sizeof(linkname),
1095 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1098 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1101 ret = readlink(linkname, pathname, sizeof(pathname));
1103 if (ret < 0 || ret > st.st_size)
1106 pathname[ret] = '\0';
1107 return trace__set_fd_pathname(thread, fd, pathname);
1110 static const char *thread__fd_path(struct thread *thread, int fd,
1111 struct trace *trace)
1113 struct thread_trace *ttrace = thread__priv(thread);
1121 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1124 ++trace->stats.proc_getname;
1125 if (thread__read_fd_path(thread, fd))
1129 return ttrace->files.table[fd].pathname;
1132 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1135 size_t printed = scnprintf(bf, size, "%d", fd);
1136 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1139 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1144 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1146 size_t printed = scnprintf(bf, size, "%d", fd);
1147 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1150 const char *path = thread__fd_path(thread, fd, trace);
1153 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1155 thread__put(thread);
1161 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1162 struct syscall_arg *arg)
1165 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1166 struct thread_trace *ttrace = thread__priv(arg->thread);
1168 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1169 zfree(&ttrace->files.table[fd].pathname);
1174 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1177 struct thread_trace *ttrace = thread__priv(thread);
1179 ttrace->filename.ptr = ptr;
1180 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1183 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1185 struct augmented_arg *augmented_arg = arg->augmented.args;
1187 return scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1190 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1191 struct syscall_arg *arg)
1193 unsigned long ptr = arg->val;
1195 if (arg->augmented.args)
1196 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1198 if (!arg->trace->vfs_getname)
1199 return scnprintf(bf, size, "%#x", ptr);
1201 thread__set_filename_pos(arg->thread, bf, ptr);
1205 static bool trace__filter_duration(struct trace *trace, double t)
1207 return t < (trace->duration_filter * NSEC_PER_MSEC);
1210 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1212 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1214 return fprintf(fp, "%10.3f ", ts);
1218 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1219 * using ttrace->entry_time for a thread that receives a sys_exit without
1220 * first having received a sys_enter ("poll" issued before tracing session
1221 * starts, lost sys_enter exit due to ring buffer overflow).
1223 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1226 return __trace__fprintf_tstamp(trace, tstamp, fp);
1228 return fprintf(fp, " ? ");
1231 static bool done = false;
1232 static bool interrupted = false;
1234 static void sig_handler(int sig)
1237 interrupted = sig == SIGINT;
1240 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1244 if (trace->multiple_threads) {
1245 if (trace->show_comm)
1246 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1247 printed += fprintf(fp, "%d ", thread->tid);
1253 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1254 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1258 if (trace->show_tstamp)
1259 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1260 if (trace->show_duration)
1261 printed += fprintf_duration(duration, duration_calculated, fp);
1262 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1265 static int trace__process_event(struct trace *trace, struct machine *machine,
1266 union perf_event *event, struct perf_sample *sample)
1270 switch (event->header.type) {
1271 case PERF_RECORD_LOST:
1272 color_fprintf(trace->output, PERF_COLOR_RED,
1273 "LOST %" PRIu64 " events!\n", event->lost.lost);
1274 ret = machine__process_lost_event(machine, event, sample);
1277 ret = machine__process_event(machine, event, sample);
1284 static int trace__tool_process(struct perf_tool *tool,
1285 union perf_event *event,
1286 struct perf_sample *sample,
1287 struct machine *machine)
1289 struct trace *trace = container_of(tool, struct trace, tool);
1290 return trace__process_event(trace, machine, event, sample);
1293 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1295 struct machine *machine = vmachine;
1297 if (machine->kptr_restrict_warned)
1300 if (symbol_conf.kptr_restrict) {
1301 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1302 "Check /proc/sys/kernel/kptr_restrict.\n\n"
1303 "Kernel samples will not be resolved.\n");
1304 machine->kptr_restrict_warned = true;
1308 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1311 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
1313 int err = symbol__init(NULL);
1318 trace->host = machine__new_host();
1319 if (trace->host == NULL)
1322 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1326 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1327 evlist->threads, trace__tool_process, false,
1336 static void trace__symbols__exit(struct trace *trace)
1338 machine__exit(trace->host);
1344 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1348 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1349 nr_args = sc->fmt->nr_args;
1351 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1352 if (sc->arg_fmt == NULL)
1355 for (idx = 0; idx < nr_args; ++idx) {
1357 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1360 sc->nr_args = nr_args;
1364 static int syscall__set_arg_fmts(struct syscall *sc)
1366 struct tep_format_field *field, *last_field = NULL;
1369 for (field = sc->args; field; field = field->next, ++idx) {
1372 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1375 if (strcmp(field->type, "const char *") == 0 &&
1376 (strcmp(field->name, "filename") == 0 ||
1377 strcmp(field->name, "path") == 0 ||
1378 strcmp(field->name, "pathname") == 0))
1379 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1380 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1381 sc->arg_fmt[idx].scnprintf = SCA_PTR;
1382 else if (strcmp(field->type, "pid_t") == 0)
1383 sc->arg_fmt[idx].scnprintf = SCA_PID;
1384 else if (strcmp(field->type, "umode_t") == 0)
1385 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1386 else if ((strcmp(field->type, "int") == 0 ||
1387 strcmp(field->type, "unsigned int") == 0 ||
1388 strcmp(field->type, "long") == 0) &&
1389 (len = strlen(field->name)) >= 2 &&
1390 strcmp(field->name + len - 2, "fd") == 0) {
1392 * /sys/kernel/tracing/events/syscalls/sys_enter*
1393 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1398 sc->arg_fmt[idx].scnprintf = SCA_FD;
1403 sc->args_size = last_field->offset + last_field->size;
1408 static int trace__read_syscall_info(struct trace *trace, int id)
1412 const char *name = syscalltbl__name(trace->sctbl, id);
1417 if (id > trace->syscalls.max) {
1418 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1420 if (nsyscalls == NULL)
1423 if (trace->syscalls.max != -1) {
1424 memset(nsyscalls + trace->syscalls.max + 1, 0,
1425 (id - trace->syscalls.max) * sizeof(*sc));
1427 memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
1430 trace->syscalls.table = nsyscalls;
1431 trace->syscalls.max = id;
1434 sc = trace->syscalls.table + id;
1437 sc->fmt = syscall_fmt__find(sc->name);
1439 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1440 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1442 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1443 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1444 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1447 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1450 if (IS_ERR(sc->tp_format))
1453 sc->args = sc->tp_format->format.fields;
1455 * We need to check and discard the first variable '__syscall_nr'
1456 * or 'nr' that mean the syscall number. It is needless here.
1457 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1459 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1460 sc->args = sc->args->next;
1464 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1465 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1467 return syscall__set_arg_fmts(sc);
1470 static int trace__validate_ev_qualifier(struct trace *trace)
1473 size_t nr_allocated;
1474 struct str_node *pos;
1476 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
1477 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
1478 sizeof(trace->ev_qualifier_ids.entries[0]));
1480 if (trace->ev_qualifier_ids.entries == NULL) {
1481 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1487 nr_allocated = trace->ev_qualifier_ids.nr;
1490 strlist__for_each_entry(pos, trace->ev_qualifier) {
1491 const char *sc = pos->s;
1492 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1495 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1500 fputs("Error:\tInvalid syscall ", trace->output);
1503 fputs(", ", trace->output);
1506 fputs(sc, trace->output);
1509 trace->ev_qualifier_ids.entries[i++] = id;
1510 if (match_next == -1)
1514 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1517 if (nr_allocated == trace->ev_qualifier_ids.nr) {
1521 entries = realloc(trace->ev_qualifier_ids.entries,
1522 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1523 if (entries == NULL) {
1525 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1528 trace->ev_qualifier_ids.entries = entries;
1530 trace->ev_qualifier_ids.nr++;
1531 trace->ev_qualifier_ids.entries[i++] = id;
1536 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
1537 "\nHint:\tand: 'man syscalls'\n", trace->output);
1539 zfree(&trace->ev_qualifier_ids.entries);
1540 trace->ev_qualifier_ids.nr = 0;
1547 * args is to be interpreted as a series of longs but we need to handle
1548 * 8-byte unaligned accesses. args points to raw_data within the event
1549 * and raw_data is guaranteed to be 8-byte unaligned because it is
1550 * preceded by raw_size which is a u32. So we need to copy args to a temp
1551 * variable to read it. Most notably this avoids extended load instructions
1552 * on unaligned addresses
1554 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1557 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1559 memcpy(&val, p, sizeof(val));
1563 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1564 struct syscall_arg *arg)
1566 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1567 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1569 return scnprintf(bf, size, "arg%d: ", arg->idx);
1573 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1574 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1575 * in tools/perf/trace/beauty/mount_flags.c
1577 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val)
1579 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val)
1580 return sc->arg_fmt[arg->idx].mask_val(arg, val);
1585 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1586 struct syscall_arg *arg, unsigned long val)
1588 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1590 if (sc->arg_fmt[arg->idx].parm)
1591 arg->parm = sc->arg_fmt[arg->idx].parm;
1592 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1594 return scnprintf(bf, size, "%ld", val);
1597 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1598 unsigned char *args, void *augmented_args, int augmented_args_size,
1599 struct trace *trace, struct thread *thread)
1604 struct syscall_arg arg = {
1607 .size = augmented_args_size,
1608 .args = augmented_args,
1614 .show_string_prefix = trace->show_string_prefix,
1616 struct thread_trace *ttrace = thread__priv(thread);
1619 * Things like fcntl will set this in its 'cmd' formatter to pick the
1620 * right formatter for the return value (an fd? file flags?), which is
1621 * not needed for syscalls that always return a given type, say an fd.
1623 ttrace->ret_scnprintf = NULL;
1625 if (sc->args != NULL) {
1626 struct tep_format_field *field;
1628 for (field = sc->args; field;
1629 field = field->next, ++arg.idx, bit <<= 1) {
1633 val = syscall_arg__val(&arg, arg.idx);
1635 * Some syscall args need some mask, most don't and
1636 * return val untouched.
1638 val = syscall__mask_val(sc, &arg, val);
1641 * Suppress this argument if its value is zero and
1642 * and we don't have a string associated in an
1646 !trace->show_zeros &&
1648 (sc->arg_fmt[arg.idx].show_zero ||
1649 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1650 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1651 sc->arg_fmt[arg.idx].parm))
1654 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
1656 if (trace->show_arg_names)
1657 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
1659 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1661 } else if (IS_ERR(sc->tp_format)) {
1663 * If we managed to read the tracepoint /format file, then we
1664 * may end up not having any args, like with gettid(), so only
1665 * print the raw args when we didn't manage to read it.
1667 while (arg.idx < sc->nr_args) {
1670 val = syscall_arg__val(&arg, arg.idx);
1672 printed += scnprintf(bf + printed, size - printed, ", ");
1673 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1674 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1684 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
1685 union perf_event *event,
1686 struct perf_sample *sample);
1688 static struct syscall *trace__syscall_info(struct trace *trace,
1689 struct perf_evsel *evsel, int id)
1695 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1696 * before that, leaving at a higher verbosity level till that is
1697 * explained. Reproduced with plain ftrace with:
1699 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1700 * grep "NR -1 " /t/trace_pipe
1702 * After generating some load on the machine.
1706 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1707 id, perf_evsel__name(evsel), ++n);
1712 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
1713 trace__read_syscall_info(trace, id))
1716 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
1719 return &trace->syscalls.table[id];
1723 fprintf(trace->output, "Problems reading syscall %d", id);
1724 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
1725 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1726 fputs(" information\n", trace->output);
1731 static void thread__update_stats(struct thread_trace *ttrace,
1732 int id, struct perf_sample *sample)
1734 struct int_node *inode;
1735 struct stats *stats;
1738 inode = intlist__findnew(ttrace->syscall_stats, id);
1742 stats = inode->priv;
1743 if (stats == NULL) {
1744 stats = malloc(sizeof(struct stats));
1748 inode->priv = stats;
1751 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1752 duration = sample->time - ttrace->entry_time;
1754 update_stats(stats, duration);
1757 static int trace__printf_interrupted_entry(struct trace *trace)
1759 struct thread_trace *ttrace;
1762 if (trace->failure_only || trace->current == NULL)
1765 ttrace = thread__priv(trace->current);
1767 if (!ttrace->entry_pending)
1770 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1771 printed += fprintf(trace->output, ")%-*s ...\n", trace->args_alignment, ttrace->entry_str);
1772 ttrace->entry_pending = false;
1774 ++trace->nr_events_printed;
1779 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
1780 struct perf_sample *sample, struct thread *thread)
1784 if (trace->print_sample) {
1785 double ts = (double)sample->time / NSEC_PER_MSEC;
1787 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1788 perf_evsel__name(evsel), ts,
1789 thread__comm_str(thread),
1790 sample->pid, sample->tid, sample->cpu);
1796 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
1798 void *augmented_args = NULL;
1800 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
1801 * and there we get all 6 syscall args plus the tracepoint common fields
1802 * that gets calculated at the start and the syscall_nr (another long).
1803 * So we check if that is the case and if so don't look after the
1804 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
1807 * We'll revisit this later to pass s->args_size to the BPF augmenter
1808 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
1809 * copies only what we need for each syscall, like what happens when we
1810 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
1811 * traffic to just what is needed for each syscall.
1813 int args_size = raw_augmented_args_size ?: sc->args_size;
1815 *augmented_args_size = sample->raw_size - args_size;
1816 if (*augmented_args_size > 0)
1817 augmented_args = sample->raw_data + args_size;
1819 return augmented_args;
1822 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
1823 union perf_event *event __maybe_unused,
1824 struct perf_sample *sample)
1829 struct thread *thread;
1830 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1831 int augmented_args_size = 0;
1832 void *augmented_args = NULL;
1833 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1834 struct thread_trace *ttrace;
1839 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1840 ttrace = thread__trace(thread, trace->output);
1844 trace__fprintf_sample(trace, evsel, sample, thread);
1846 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1848 if (ttrace->entry_str == NULL) {
1849 ttrace->entry_str = malloc(trace__entry_str_size);
1850 if (!ttrace->entry_str)
1854 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1855 trace__printf_interrupted_entry(trace);
1857 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
1858 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
1859 * this breaks syscall__augmented_args() check for augmented args, as we calculate
1860 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
1861 * so when handling, say the openat syscall, we end up getting 6 args for the
1862 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
1863 * thinking that the extra 2 u64 args are the augmented filename, so just check
1864 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
1866 if (evsel != trace->syscalls.events.sys_enter)
1867 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1868 ttrace->entry_time = sample->time;
1869 msg = ttrace->entry_str;
1870 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1872 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1873 args, augmented_args, augmented_args_size, trace, thread);
1876 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1879 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
1880 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
1881 if (trace->args_alignment > printed)
1882 alignment = trace->args_alignment - printed;
1883 fprintf(trace->output, "%*s= ?\n", alignment, " ");
1886 ttrace->entry_pending = true;
1887 /* See trace__vfs_getname & trace__sys_exit */
1888 ttrace->filename.pending_open = false;
1891 if (trace->current != thread) {
1892 thread__put(trace->current);
1893 trace->current = thread__get(thread);
1897 thread__put(thread);
1901 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel,
1902 struct perf_sample *sample)
1904 struct thread_trace *ttrace;
1905 struct thread *thread;
1906 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1907 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1909 void *args, *augmented_args = NULL;
1910 int augmented_args_size;
1915 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1916 ttrace = thread__trace(thread, trace->output);
1918 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
1919 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
1924 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1925 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
1926 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
1927 fprintf(trace->output, "%s", msg);
1930 thread__put(thread);
1934 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
1935 struct perf_sample *sample,
1936 struct callchain_cursor *cursor)
1938 struct addr_location al;
1939 int max_stack = evsel->attr.sample_max_stack ?
1940 evsel->attr.sample_max_stack :
1944 if (machine__resolve(trace->host, &al, sample) < 0)
1947 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
1948 addr_location__put(&al);
1952 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
1954 /* TODO: user-configurable print_opts */
1955 const unsigned int print_opts = EVSEL__PRINT_SYM |
1957 EVSEL__PRINT_UNKNOWN_AS_ADDR;
1959 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
1962 static const char *errno_to_name(struct perf_evsel *evsel, int err)
1964 struct perf_env *env = perf_evsel__env(evsel);
1965 const char *arch_name = perf_env__arch(env);
1967 return arch_syscalls__strerrno(arch_name, err);
1970 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
1971 union perf_event *event __maybe_unused,
1972 struct perf_sample *sample)
1976 bool duration_calculated = false;
1977 struct thread *thread;
1978 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
1979 int alignment = trace->args_alignment;
1980 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1981 struct thread_trace *ttrace;
1986 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1987 ttrace = thread__trace(thread, trace->output);
1991 trace__fprintf_sample(trace, evsel, sample, thread);
1994 thread__update_stats(ttrace, id, sample);
1996 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
1998 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
1999 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2000 ttrace->filename.pending_open = false;
2001 ++trace->stats.vfs_getname;
2004 if (ttrace->entry_time) {
2005 duration = sample->time - ttrace->entry_time;
2006 if (trace__filter_duration(trace, duration))
2008 duration_calculated = true;
2009 } else if (trace->duration_filter)
2012 if (sample->callchain) {
2013 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2014 if (callchain_ret == 0) {
2015 if (callchain_cursor.nr < trace->min_stack)
2021 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2024 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2026 if (ttrace->entry_pending) {
2027 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2029 fprintf(trace->output, " ... [");
2030 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2031 fprintf(trace->output, "]: %s()", sc->name);
2034 printed++; /* the closing ')' */
2036 if (alignment > printed)
2037 alignment -= printed;
2041 fprintf(trace->output, ")%*s= ", alignment, " ");
2043 if (sc->fmt == NULL) {
2047 fprintf(trace->output, "%ld", ret);
2048 } else if (ret < 0) {
2050 char bf[STRERR_BUFSIZE];
2051 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2052 *e = errno_to_name(evsel, -ret);
2054 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2056 } else if (ret == 0 && sc->fmt->timeout)
2057 fprintf(trace->output, "0 (Timeout)");
2058 else if (ttrace->ret_scnprintf) {
2060 struct syscall_arg arg = {
2065 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2066 ttrace->ret_scnprintf = NULL;
2067 fprintf(trace->output, "%s", bf);
2068 } else if (sc->fmt->hexret)
2069 fprintf(trace->output, "%#lx", ret);
2070 else if (sc->fmt->errpid) {
2071 struct thread *child = machine__find_thread(trace->host, ret, ret);
2073 if (child != NULL) {
2074 fprintf(trace->output, "%ld", ret);
2075 if (child->comm_set)
2076 fprintf(trace->output, " (%s)", thread__comm_str(child));
2082 fputc('\n', trace->output);
2085 * We only consider an 'event' for the sake of --max-events a non-filtered
2086 * sys_enter + sys_exit and other tracepoint events.
2088 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2091 if (callchain_ret > 0)
2092 trace__fprintf_callchain(trace, sample);
2093 else if (callchain_ret < 0)
2094 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2096 ttrace->entry_pending = false;
2099 thread__put(thread);
2103 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
2104 union perf_event *event __maybe_unused,
2105 struct perf_sample *sample)
2107 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2108 struct thread_trace *ttrace;
2109 size_t filename_len, entry_str_len, to_move;
2110 ssize_t remaining_space;
2112 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2117 ttrace = thread__priv(thread);
2121 filename_len = strlen(filename);
2122 if (filename_len == 0)
2125 if (ttrace->filename.namelen < filename_len) {
2126 char *f = realloc(ttrace->filename.name, filename_len + 1);
2131 ttrace->filename.namelen = filename_len;
2132 ttrace->filename.name = f;
2135 strcpy(ttrace->filename.name, filename);
2136 ttrace->filename.pending_open = true;
2138 if (!ttrace->filename.ptr)
2141 entry_str_len = strlen(ttrace->entry_str);
2142 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2143 if (remaining_space <= 0)
2146 if (filename_len > (size_t)remaining_space) {
2147 filename += filename_len - remaining_space;
2148 filename_len = remaining_space;
2151 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2152 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2153 memmove(pos + filename_len, pos, to_move);
2154 memcpy(pos, filename, filename_len);
2156 ttrace->filename.ptr = 0;
2157 ttrace->filename.entry_str_pos = 0;
2159 thread__put(thread);
2164 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
2165 union perf_event *event __maybe_unused,
2166 struct perf_sample *sample)
2168 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2169 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2170 struct thread *thread = machine__findnew_thread(trace->host,
2173 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2178 ttrace->runtime_ms += runtime_ms;
2179 trace->runtime_ms += runtime_ms;
2181 thread__put(thread);
2185 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2187 perf_evsel__strval(evsel, sample, "comm"),
2188 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2190 perf_evsel__intval(evsel, sample, "vruntime"));
2194 static int bpf_output__printer(enum binary_printer_ops op,
2195 unsigned int val, void *extra __maybe_unused, FILE *fp)
2197 unsigned char ch = (unsigned char)val;
2200 case BINARY_PRINT_CHAR_DATA:
2201 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2202 case BINARY_PRINT_DATA_BEGIN:
2203 case BINARY_PRINT_LINE_BEGIN:
2204 case BINARY_PRINT_ADDR:
2205 case BINARY_PRINT_NUM_DATA:
2206 case BINARY_PRINT_NUM_PAD:
2207 case BINARY_PRINT_SEP:
2208 case BINARY_PRINT_CHAR_PAD:
2209 case BINARY_PRINT_LINE_END:
2210 case BINARY_PRINT_DATA_END:
2218 static void bpf_output__fprintf(struct trace *trace,
2219 struct perf_sample *sample)
2221 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2222 bpf_output__printer, NULL, trace->output);
2223 ++trace->nr_events_printed;
2226 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
2227 union perf_event *event __maybe_unused,
2228 struct perf_sample *sample)
2230 struct thread *thread;
2231 int callchain_ret = 0;
2233 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2234 * this event's max_events having been hit and this is an entry coming
2235 * from the ring buffer that we should discard, since the max events
2236 * have already been considered/printed.
2238 if (evsel->disabled)
2241 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2243 if (sample->callchain) {
2244 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2245 if (callchain_ret == 0) {
2246 if (callchain_cursor.nr < trace->min_stack)
2252 trace__printf_interrupted_entry(trace);
2253 trace__fprintf_tstamp(trace, sample->time, trace->output);
2255 if (trace->trace_syscalls && trace->show_duration)
2256 fprintf(trace->output, "( ): ");
2259 trace__fprintf_comm_tid(trace, thread, trace->output);
2261 if (evsel == trace->syscalls.events.augmented) {
2262 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2263 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2266 fprintf(trace->output, "%s(", sc->name);
2267 trace__fprintf_sys_enter(trace, evsel, sample);
2268 fputc(')', trace->output);
2273 * XXX: Not having the associated syscall info or not finding/adding
2274 * the thread should never happen, but if it does...
2275 * fall thru and print it as a bpf_output event.
2279 fprintf(trace->output, "%s:", evsel->name);
2281 if (perf_evsel__is_bpf_output(evsel)) {
2282 bpf_output__fprintf(trace, sample);
2283 } else if (evsel->tp_format) {
2284 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2285 trace__fprintf_sys_enter(trace, evsel, sample)) {
2286 event_format__fprintf(evsel->tp_format, sample->cpu,
2287 sample->raw_data, sample->raw_size,
2289 ++trace->nr_events_printed;
2291 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2292 perf_evsel__disable(evsel);
2293 perf_evsel__close(evsel);
2299 fprintf(trace->output, "\n");
2301 if (callchain_ret > 0)
2302 trace__fprintf_callchain(trace, sample);
2303 else if (callchain_ret < 0)
2304 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2306 thread__put(thread);
2310 static void print_location(FILE *f, struct perf_sample *sample,
2311 struct addr_location *al,
2312 bool print_dso, bool print_sym)
2315 if ((verbose > 0 || print_dso) && al->map)
2316 fprintf(f, "%s@", al->map->dso->long_name);
2318 if ((verbose > 0 || print_sym) && al->sym)
2319 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2320 al->addr - al->sym->start);
2322 fprintf(f, "0x%" PRIx64, al->addr);
2324 fprintf(f, "0x%" PRIx64, sample->addr);
2327 static int trace__pgfault(struct trace *trace,
2328 struct perf_evsel *evsel,
2329 union perf_event *event __maybe_unused,
2330 struct perf_sample *sample)
2332 struct thread *thread;
2333 struct addr_location al;
2334 char map_type = 'd';
2335 struct thread_trace *ttrace;
2337 int callchain_ret = 0;
2339 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2341 if (sample->callchain) {
2342 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2343 if (callchain_ret == 0) {
2344 if (callchain_cursor.nr < trace->min_stack)
2350 ttrace = thread__trace(thread, trace->output);
2354 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2359 if (trace->summary_only)
2362 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2364 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2366 fprintf(trace->output, "%sfault [",
2367 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2370 print_location(trace->output, sample, &al, false, true);
2372 fprintf(trace->output, "] => ");
2374 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2377 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2385 print_location(trace->output, sample, &al, true, false);
2387 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2389 if (callchain_ret > 0)
2390 trace__fprintf_callchain(trace, sample);
2391 else if (callchain_ret < 0)
2392 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2394 ++trace->nr_events_printed;
2398 thread__put(thread);
2402 static void trace__set_base_time(struct trace *trace,
2403 struct perf_evsel *evsel,
2404 struct perf_sample *sample)
2407 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2408 * and don't use sample->time unconditionally, we may end up having
2409 * some other event in the future without PERF_SAMPLE_TIME for good
2410 * reason, i.e. we may not be interested in its timestamps, just in
2411 * it taking place, picking some piece of information when it
2412 * appears in our event stream (vfs_getname comes to mind).
2414 if (trace->base_time == 0 && !trace->full_time &&
2415 (evsel->attr.sample_type & PERF_SAMPLE_TIME))
2416 trace->base_time = sample->time;
2419 static int trace__process_sample(struct perf_tool *tool,
2420 union perf_event *event,
2421 struct perf_sample *sample,
2422 struct perf_evsel *evsel,
2423 struct machine *machine __maybe_unused)
2425 struct trace *trace = container_of(tool, struct trace, tool);
2426 struct thread *thread;
2429 tracepoint_handler handler = evsel->handler;
2431 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2432 if (thread && thread__is_filtered(thread))
2435 trace__set_base_time(trace, evsel, sample);
2439 handler(trace, evsel, event, sample);
2442 thread__put(thread);
2446 static int trace__record(struct trace *trace, int argc, const char **argv)
2448 unsigned int rec_argc, i, j;
2449 const char **rec_argv;
2450 const char * const record_args[] = {
2457 const char * const sc_args[] = { "-e", };
2458 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2459 const char * const majpf_args[] = { "-e", "major-faults" };
2460 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2461 const char * const minpf_args[] = { "-e", "minor-faults" };
2462 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2464 /* +1 is for the event string below */
2465 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2466 majpf_args_nr + minpf_args_nr + argc;
2467 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2469 if (rec_argv == NULL)
2473 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2474 rec_argv[j++] = record_args[i];
2476 if (trace->trace_syscalls) {
2477 for (i = 0; i < sc_args_nr; i++)
2478 rec_argv[j++] = sc_args[i];
2480 /* event string may be different for older kernels - e.g., RHEL6 */
2481 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2482 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2483 else if (is_valid_tracepoint("syscalls:sys_enter"))
2484 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2486 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2492 if (trace->trace_pgfaults & TRACE_PFMAJ)
2493 for (i = 0; i < majpf_args_nr; i++)
2494 rec_argv[j++] = majpf_args[i];
2496 if (trace->trace_pgfaults & TRACE_PFMIN)
2497 for (i = 0; i < minpf_args_nr; i++)
2498 rec_argv[j++] = minpf_args[i];
2500 for (i = 0; i < (unsigned int)argc; i++)
2501 rec_argv[j++] = argv[i];
2503 return cmd_record(j, rec_argv);
2506 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2508 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
2510 struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");
2515 if (perf_evsel__field(evsel, "pathname") == NULL) {
2516 perf_evsel__delete(evsel);
2520 evsel->handler = trace__vfs_getname;
2521 perf_evlist__add(evlist, evsel);
2525 static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
2527 struct perf_evsel *evsel;
2528 struct perf_event_attr attr = {
2529 .type = PERF_TYPE_SOFTWARE,
2533 attr.config = config;
2534 attr.sample_period = 1;
2536 event_attr_init(&attr);
2538 evsel = perf_evsel__new(&attr);
2540 evsel->handler = trace__pgfault;
2545 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2547 const u32 type = event->header.type;
2548 struct perf_evsel *evsel;
2550 if (type != PERF_RECORD_SAMPLE) {
2551 trace__process_event(trace, trace->host, event, sample);
2555 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2556 if (evsel == NULL) {
2557 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2561 trace__set_base_time(trace, evsel, sample);
2563 if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
2564 sample->raw_data == NULL) {
2565 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2566 perf_evsel__name(evsel), sample->tid,
2567 sample->cpu, sample->raw_size);
2569 tracepoint_handler handler = evsel->handler;
2570 handler(trace, evsel, event, sample);
2573 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
2577 static int trace__add_syscall_newtp(struct trace *trace)
2580 struct perf_evlist *evlist = trace->evlist;
2581 struct perf_evsel *sys_enter, *sys_exit;
2583 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
2584 if (sys_enter == NULL)
2587 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2588 goto out_delete_sys_enter;
2590 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
2591 if (sys_exit == NULL)
2592 goto out_delete_sys_enter;
2594 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2595 goto out_delete_sys_exit;
2597 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2598 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2600 perf_evlist__add(evlist, sys_enter);
2601 perf_evlist__add(evlist, sys_exit);
2603 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2605 * We're interested only in the user space callchain
2606 * leading to the syscall, allow overriding that for
2607 * debugging reasons using --kernel_syscall_callchains
2609 sys_exit->attr.exclude_callchain_kernel = 1;
2612 trace->syscalls.events.sys_enter = sys_enter;
2613 trace->syscalls.events.sys_exit = sys_exit;
2619 out_delete_sys_exit:
2620 perf_evsel__delete_priv(sys_exit);
2621 out_delete_sys_enter:
2622 perf_evsel__delete_priv(sys_enter);
2626 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
2629 struct perf_evsel *sys_exit;
2630 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2631 trace->ev_qualifier_ids.nr,
2632 trace->ev_qualifier_ids.entries);
2637 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2639 sys_exit = trace->syscalls.events.sys_exit;
2640 err = perf_evsel__append_tp_filter(sys_exit, filter);
2651 #ifdef HAVE_LIBBPF_SUPPORT
2652 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
2654 int fd = bpf_map__fd(trace->syscalls.map);
2655 struct bpf_map_syscall_entry value = {
2656 .enabled = !trace->not_ev_qualifier,
2661 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
2662 int key = trace->ev_qualifier_ids.entries[i];
2664 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
2672 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
2674 int fd = bpf_map__fd(trace->syscalls.map);
2675 struct bpf_map_syscall_entry value = {
2680 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
2681 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
2689 static int trace__init_syscalls_bpf_map(struct trace *trace)
2691 bool enabled = true;
2693 if (trace->ev_qualifier_ids.nr)
2694 enabled = trace->not_ev_qualifier;
2696 return __trace__init_syscalls_bpf_map(trace, enabled);
2699 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
2704 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
2708 #endif // HAVE_LIBBPF_SUPPORT
2710 static int trace__set_ev_qualifier_filter(struct trace *trace)
2712 if (trace->syscalls.map)
2713 return trace__set_ev_qualifier_bpf_filter(trace);
2714 if (trace->syscalls.events.sys_enter)
2715 return trace__set_ev_qualifier_tp_filter(trace);
2719 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
2720 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
2723 #ifdef HAVE_LIBBPF_SUPPORT
2725 int map_fd = bpf_map__fd(map);
2728 for (i = 0; i < npids; ++i) {
2729 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
2737 static int trace__set_filter_loop_pids(struct trace *trace)
2739 unsigned int nr = 1, err;
2743 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
2745 while (thread && nr < ARRAY_SIZE(pids)) {
2746 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
2751 if (!strcmp(thread__comm_str(parent), "sshd")) {
2752 pids[nr++] = parent->tid;
2758 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids);
2759 if (!err && trace->filter_pids.map)
2760 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
2765 static int trace__set_filter_pids(struct trace *trace)
2769 * Better not use !target__has_task() here because we need to cover the
2770 * case where no threads were specified in the command line, but a
2771 * workload was, and in that case we will fill in the thread_map when
2772 * we fork the workload in perf_evlist__prepare_workload.
2774 if (trace->filter_pids.nr > 0) {
2775 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
2776 trace->filter_pids.entries);
2777 if (!err && trace->filter_pids.map) {
2778 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
2779 trace->filter_pids.entries);
2781 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) {
2782 err = trace__set_filter_loop_pids(trace);
2788 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
2790 struct perf_evlist *evlist = trace->evlist;
2791 struct perf_sample sample;
2794 err = perf_evlist__parse_sample(evlist, event, &sample);
2796 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
2798 trace__handle_event(trace, event, &sample);
2803 static int __trace__flush_events(struct trace *trace)
2805 u64 first = ordered_events__first_time(&trace->oe.data);
2806 u64 flush = trace->oe.last - NSEC_PER_SEC;
2808 /* Is there some thing to flush.. */
2809 if (first && first < flush)
2810 return ordered_events__flush_time(&trace->oe.data, flush);
2815 static int trace__flush_events(struct trace *trace)
2817 return !trace->sort_events ? 0 : __trace__flush_events(trace);
2820 static int trace__deliver_event(struct trace *trace, union perf_event *event)
2824 if (!trace->sort_events)
2825 return __trace__deliver_event(trace, event);
2827 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
2828 if (err && err != -1)
2831 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
2835 return trace__flush_events(trace);
2838 static int ordered_events__deliver_event(struct ordered_events *oe,
2839 struct ordered_event *event)
2841 struct trace *trace = container_of(oe, struct trace, oe.data);
2843 return __trace__deliver_event(trace, event->event);
2846 static int trace__run(struct trace *trace, int argc, const char **argv)
2848 struct perf_evlist *evlist = trace->evlist;
2849 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
2851 unsigned long before;
2852 const bool forks = argc > 0;
2853 bool draining = false;
2857 if (!trace->raw_augmented_syscalls) {
2858 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
2859 goto out_error_raw_syscalls;
2861 if (trace->trace_syscalls)
2862 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
2865 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
2866 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
2867 if (pgfault_maj == NULL)
2869 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
2870 perf_evlist__add(evlist, pgfault_maj);
2873 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
2874 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
2875 if (pgfault_min == NULL)
2877 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
2878 perf_evlist__add(evlist, pgfault_min);
2882 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
2883 trace__sched_stat_runtime))
2884 goto out_error_sched_stat_runtime;
2887 * If a global cgroup was set, apply it to all the events without an
2888 * explicit cgroup. I.e.:
2890 * trace -G A -e sched:*switch
2892 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
2893 * _and_ sched:sched_switch to the 'A' cgroup, while:
2895 * trace -e sched:*switch -G A
2897 * will only set the sched:sched_switch event to the 'A' cgroup, all the
2898 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
2899 * a cgroup (on the root cgroup, sys wide, etc).
2903 * trace -G A -e sched:*switch -G B
2905 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
2906 * to the 'B' cgroup.
2908 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
2909 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
2912 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
2914 err = perf_evlist__create_maps(evlist, &trace->opts.target);
2916 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
2917 goto out_delete_evlist;
2920 err = trace__symbols_init(trace, evlist);
2922 fprintf(trace->output, "Problems initializing symbol libraries!\n");
2923 goto out_delete_evlist;
2926 perf_evlist__config(evlist, &trace->opts, &callchain_param);
2928 signal(SIGCHLD, sig_handler);
2929 signal(SIGINT, sig_handler);
2932 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
2935 fprintf(trace->output, "Couldn't run the workload!\n");
2936 goto out_delete_evlist;
2940 err = perf_evlist__open(evlist);
2942 goto out_error_open;
2944 err = bpf__apply_obj_config();
2946 char errbuf[BUFSIZ];
2948 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
2949 pr_err("ERROR: Apply config to BPF failed: %s\n",
2951 goto out_error_open;
2954 err = trace__set_filter_pids(trace);
2958 if (trace->syscalls.map)
2959 trace__init_syscalls_bpf_map(trace);
2961 if (trace->ev_qualifier_ids.nr > 0) {
2962 err = trace__set_ev_qualifier_filter(trace);
2966 if (trace->syscalls.events.sys_exit) {
2967 pr_debug("event qualifier tracepoint filter: %s\n",
2968 trace->syscalls.events.sys_exit->filter);
2972 err = perf_evlist__apply_filters(evlist, &evsel);
2974 goto out_error_apply_filters;
2976 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
2978 goto out_error_mmap;
2980 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
2981 perf_evlist__enable(evlist);
2984 perf_evlist__start_workload(evlist);
2986 if (trace->opts.initial_delay) {
2987 usleep(trace->opts.initial_delay * 1000);
2988 perf_evlist__enable(evlist);
2991 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
2992 evlist->threads->nr > 1 ||
2993 perf_evlist__first(evlist)->attr.inherit;
2996 * Now that we already used evsel->attr to ask the kernel to setup the
2997 * events, lets reuse evsel->attr.sample_max_stack as the limit in
2998 * trace__resolve_callchain(), allowing per-event max-stack settings
2999 * to override an explicitly set --max-stack global setting.
3001 evlist__for_each_entry(evlist, evsel) {
3002 if (evsel__has_callchain(evsel) &&
3003 evsel->attr.sample_max_stack == 0)
3004 evsel->attr.sample_max_stack = trace->max_stack;
3007 before = trace->nr_events;
3009 for (i = 0; i < evlist->nr_mmaps; i++) {
3010 union perf_event *event;
3011 struct perf_mmap *md;
3013 md = &evlist->mmap[i];
3014 if (perf_mmap__read_init(md) < 0)
3017 while ((event = perf_mmap__read_event(md)) != NULL) {
3020 err = trace__deliver_event(trace, event);
3024 perf_mmap__consume(md);
3029 if (done && !draining) {
3030 perf_evlist__disable(evlist);
3034 perf_mmap__read_done(md);
3037 if (trace->nr_events == before) {
3038 int timeout = done ? 100 : -1;
3040 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
3041 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
3046 if (trace__flush_events(trace))
3054 thread__zput(trace->current);
3056 perf_evlist__disable(evlist);
3058 if (trace->sort_events)
3059 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
3063 trace__fprintf_thread_summary(trace, trace->output);
3065 if (trace->show_tool_stats) {
3066 fprintf(trace->output, "Stats:\n "
3067 " vfs_getname : %" PRIu64 "\n"
3068 " proc_getname: %" PRIu64 "\n",
3069 trace->stats.vfs_getname,
3070 trace->stats.proc_getname);
3075 trace__symbols__exit(trace);
3077 perf_evlist__delete(evlist);
3078 cgroup__put(trace->cgroup);
3079 trace->evlist = NULL;
3080 trace->live = false;
3083 char errbuf[BUFSIZ];
3085 out_error_sched_stat_runtime:
3086 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
3089 out_error_raw_syscalls:
3090 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
3094 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
3098 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
3101 fprintf(trace->output, "%s\n", errbuf);
3102 goto out_delete_evlist;
3104 out_error_apply_filters:
3105 fprintf(trace->output,
3106 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
3107 evsel->filter, perf_evsel__name(evsel), errno,
3108 str_error_r(errno, errbuf, sizeof(errbuf)));
3109 goto out_delete_evlist;
3112 fprintf(trace->output, "Not enough memory to run!\n");
3113 goto out_delete_evlist;
3116 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
3117 goto out_delete_evlist;
3120 static int trace__replay(struct trace *trace)
3122 const struct perf_evsel_str_handler handlers[] = {
3123 { "probe:vfs_getname", trace__vfs_getname, },
3125 struct perf_data data = {
3129 .mode = PERF_DATA_MODE_READ,
3130 .force = trace->force,
3132 struct perf_session *session;
3133 struct perf_evsel *evsel;
3136 trace->tool.sample = trace__process_sample;
3137 trace->tool.mmap = perf_event__process_mmap;
3138 trace->tool.mmap2 = perf_event__process_mmap2;
3139 trace->tool.comm = perf_event__process_comm;
3140 trace->tool.exit = perf_event__process_exit;
3141 trace->tool.fork = perf_event__process_fork;
3142 trace->tool.attr = perf_event__process_attr;
3143 trace->tool.tracing_data = perf_event__process_tracing_data;
3144 trace->tool.build_id = perf_event__process_build_id;
3145 trace->tool.namespaces = perf_event__process_namespaces;
3147 trace->tool.ordered_events = true;
3148 trace->tool.ordering_requires_timestamps = true;
3150 /* add tid to output */
3151 trace->multiple_threads = true;
3153 session = perf_session__new(&data, false, &trace->tool);
3154 if (session == NULL)
3157 if (trace->opts.target.pid)
3158 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
3160 if (trace->opts.target.tid)
3161 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
3163 if (symbol__init(&session->header.env) < 0)
3166 trace->host = &session->machines.host;
3168 err = perf_session__set_tracepoints_handlers(session, handlers);
3172 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3173 "raw_syscalls:sys_enter");
3174 /* older kernels have syscalls tp versus raw_syscalls */
3176 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3177 "syscalls:sys_enter");
3180 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
3181 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
3182 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
3186 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3187 "raw_syscalls:sys_exit");
3189 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
3190 "syscalls:sys_exit");
3192 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
3193 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
3194 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
3198 evlist__for_each_entry(session->evlist, evsel) {
3199 if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
3200 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
3201 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
3202 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
3203 evsel->handler = trace__pgfault;
3208 err = perf_session__process_events(session);
3210 pr_err("Failed to process events, error %d", err);
3212 else if (trace->summary)
3213 trace__fprintf_thread_summary(trace, trace->output);
3216 perf_session__delete(session);
3221 static size_t trace__fprintf_threads_header(FILE *fp)
3225 printed = fprintf(fp, "\n Summary of events:\n\n");
3230 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
3231 struct stats *stats;
3236 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
3237 struct stats *stats = source->priv;
3239 entry->syscall = source->i;
3240 entry->stats = stats;
3241 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
3244 static size_t thread__dump_stats(struct thread_trace *ttrace,
3245 struct trace *trace, FILE *fp)
3250 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
3252 if (syscall_stats == NULL)
3255 printed += fprintf(fp, "\n");
3257 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
3258 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
3259 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
3261 resort_rb__for_each_entry(nd, syscall_stats) {
3262 struct stats *stats = syscall_stats_entry->stats;
3264 double min = (double)(stats->min) / NSEC_PER_MSEC;
3265 double max = (double)(stats->max) / NSEC_PER_MSEC;
3266 double avg = avg_stats(stats);
3268 u64 n = (u64) stats->n;
3270 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
3271 avg /= NSEC_PER_MSEC;
3273 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
3274 printed += fprintf(fp, " %-15s", sc->name);
3275 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
3276 n, syscall_stats_entry->msecs, min, avg);
3277 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
3281 resort_rb__delete(syscall_stats);
3282 printed += fprintf(fp, "\n\n");
3287 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
3290 struct thread_trace *ttrace = thread__priv(thread);
3296 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
3298 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
3299 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
3300 printed += fprintf(fp, "%.1f%%", ratio);
3302 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
3304 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
3306 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
3307 else if (fputc('\n', fp) != EOF)
3310 printed += thread__dump_stats(ttrace, trace, fp);
3315 static unsigned long thread__nr_events(struct thread_trace *ttrace)
3317 return ttrace ? ttrace->nr_events : 0;
3320 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
3321 struct thread *thread;
3324 entry->thread = rb_entry(nd, struct thread, rb_node);
3327 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
3329 size_t printed = trace__fprintf_threads_header(fp);
3333 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
3334 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
3336 if (threads == NULL) {
3337 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
3341 resort_rb__for_each_entry(nd, threads)
3342 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
3344 resort_rb__delete(threads);
3349 static int trace__set_duration(const struct option *opt, const char *str,
3350 int unset __maybe_unused)
3352 struct trace *trace = opt->value;
3354 trace->duration_filter = atof(str);
3358 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
3359 int unset __maybe_unused)
3363 struct trace *trace = opt->value;
3365 * FIXME: introduce a intarray class, plain parse csv and create a
3366 * { int nr, int entries[] } struct...
3368 struct intlist *list = intlist__new(str);
3373 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
3374 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
3376 if (trace->filter_pids.entries == NULL)
3379 trace->filter_pids.entries[0] = getpid();
3381 for (i = 1; i < trace->filter_pids.nr; ++i)
3382 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
3384 intlist__delete(list);
3390 static int trace__open_output(struct trace *trace, const char *filename)
3394 if (!stat(filename, &st) && st.st_size) {
3395 char oldname[PATH_MAX];
3397 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
3399 rename(filename, oldname);
3402 trace->output = fopen(filename, "w");
3404 return trace->output == NULL ? -errno : 0;
3407 static int parse_pagefaults(const struct option *opt, const char *str,
3408 int unset __maybe_unused)
3410 int *trace_pgfaults = opt->value;
3412 if (strcmp(str, "all") == 0)
3413 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
3414 else if (strcmp(str, "maj") == 0)
3415 *trace_pgfaults |= TRACE_PFMAJ;
3416 else if (strcmp(str, "min") == 0)
3417 *trace_pgfaults |= TRACE_PFMIN;
3424 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
3426 struct perf_evsel *evsel;
3428 evlist__for_each_entry(evlist, evsel)
3429 evsel->handler = handler;
3432 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist)
3434 struct perf_evsel *evsel;
3436 evlist__for_each_entry(evlist, evsel) {
3437 if (evsel->priv || !evsel->tp_format)
3440 if (strcmp(evsel->tp_format->system, "syscalls"))
3443 if (perf_evsel__init_syscall_tp(evsel))
3446 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
3447 struct syscall_tp *sc = evsel->priv;
3449 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
3451 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
3452 struct syscall_tp *sc = evsel->priv;
3454 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
3463 * XXX: Hackish, just splitting the combined -e+--event (syscalls
3464 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
3465 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
3467 * It'd be better to introduce a parse_options() variant that would return a
3468 * list with the terms it didn't match to an event...
3470 static int trace__parse_events_option(const struct option *opt, const char *str,
3471 int unset __maybe_unused)
3473 struct trace *trace = (struct trace *)opt->value;
3474 const char *s = str;
3475 char *sep = NULL, *lists[2] = { NULL, NULL, };
3476 int len = strlen(str) + 1, err = -1, list, idx;
3477 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
3478 char group_name[PATH_MAX];
3479 struct syscall_fmt *fmt;
3481 if (strace_groups_dir == NULL)
3486 trace->not_ev_qualifier = true;
3490 if ((sep = strchr(s, ',')) != NULL)
3494 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
3495 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
3500 fmt = syscall_fmt__find_by_alias(s);
3505 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
3506 if (access(group_name, R_OK) == 0)
3511 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
3513 lists[list] = malloc(len);
3514 if (lists[list] == NULL)
3516 strcpy(lists[list], s);
3526 if (lists[1] != NULL) {
3527 struct strlist_config slist_config = {
3528 .dirname = strace_groups_dir,
3531 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
3532 if (trace->ev_qualifier == NULL) {
3533 fputs("Not enough memory to parse event qualifier", trace->output);
3537 if (trace__validate_ev_qualifier(trace))
3539 trace->trace_syscalls = true;
3545 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3546 "event selector. use 'perf list' to list available events",
3547 parse_events_option);
3548 err = parse_events_option(&o, lists[0], 0);
3557 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3559 struct trace *trace = opt->value;
3561 if (!list_empty(&trace->evlist->entries))
3562 return parse_cgroups(opt, str, unset);
3564 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
3569 static struct bpf_map *bpf__find_map_by_name(const char *name)
3571 struct bpf_object *obj, *tmp;
3573 bpf_object__for_each_safe(obj, tmp) {
3574 struct bpf_map *map = bpf_object__find_map_by_name(obj, name);
3583 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3585 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered");
3588 static void trace__set_bpf_map_syscalls(struct trace *trace)
3590 trace->syscalls.map = bpf__find_map_by_name("syscalls");
3593 static int trace__config(const char *var, const char *value, void *arg)
3595 struct trace *trace = arg;
3598 if (!strcmp(var, "trace.add_events")) {
3599 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3600 "event selector. use 'perf list' to list available events",
3601 parse_events_option);
3602 err = parse_events_option(&o, value, 0);
3603 } else if (!strcmp(var, "trace.show_timestamp")) {
3604 trace->show_tstamp = perf_config_bool(var, value);
3605 } else if (!strcmp(var, "trace.show_duration")) {
3606 trace->show_duration = perf_config_bool(var, value);
3607 } else if (!strcmp(var, "trace.show_arg_names")) {
3608 trace->show_arg_names = perf_config_bool(var, value);
3609 if (!trace->show_arg_names)
3610 trace->show_zeros = true;
3611 } else if (!strcmp(var, "trace.show_zeros")) {
3612 bool new_show_zeros = perf_config_bool(var, value);
3613 if (!trace->show_arg_names && !new_show_zeros) {
3614 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
3617 trace->show_zeros = new_show_zeros;
3618 } else if (!strcmp(var, "trace.show_prefix")) {
3619 trace->show_string_prefix = perf_config_bool(var, value);
3620 } else if (!strcmp(var, "trace.no_inherit")) {
3621 trace->opts.no_inherit = perf_config_bool(var, value);
3622 } else if (!strcmp(var, "trace.args_alignment")) {
3623 int args_alignment = 0;
3624 if (perf_config_int(&args_alignment, var, value) == 0)
3625 trace->args_alignment = args_alignment;
3631 int cmd_trace(int argc, const char **argv)
3633 const char *trace_usage[] = {
3634 "perf trace [<options>] [<command>]",
3635 "perf trace [<options>] -- <command> [<options>]",
3636 "perf trace record [<options>] [<command>]",
3637 "perf trace record [<options>] -- <command> [<options>]",
3640 struct trace trace = {
3649 .user_freq = UINT_MAX,
3650 .user_interval = ULLONG_MAX,
3651 .no_buffering = true,
3652 .mmap_pages = UINT_MAX,
3656 .show_tstamp = true,
3657 .show_duration = true,
3658 .show_arg_names = true,
3659 .args_alignment = 70,
3660 .trace_syscalls = false,
3661 .kernel_syscallchains = false,
3662 .max_stack = UINT_MAX,
3663 .max_events = ULONG_MAX,
3665 const char *output_name = NULL;
3666 const struct option trace_options[] = {
3667 OPT_CALLBACK('e', "event", &trace, "event",
3668 "event/syscall selector. use 'perf list' to list available events",
3669 trace__parse_events_option),
3670 OPT_BOOLEAN(0, "comm", &trace.show_comm,
3671 "show the thread COMM next to its id"),
3672 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
3673 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
3674 trace__parse_events_option),
3675 OPT_STRING('o', "output", &output_name, "file", "output file name"),
3676 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
3677 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
3678 "trace events on existing process id"),
3679 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
3680 "trace events on existing thread id"),
3681 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
3682 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
3683 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
3684 "system-wide collection from all CPUs"),
3685 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
3686 "list of cpus to monitor"),
3687 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
3688 "child tasks do not inherit counters"),
3689 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
3690 "number of mmap data pages",
3691 perf_evlist__parse_mmap_pages),
3692 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
3694 OPT_CALLBACK(0, "duration", &trace, "float",
3695 "show only events with duration > N.M ms",
3696 trace__set_duration),
3697 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
3698 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
3699 OPT_BOOLEAN('T', "time", &trace.full_time,
3700 "Show full timestamp, not time relative to first start"),
3701 OPT_BOOLEAN(0, "failure", &trace.failure_only,
3702 "Show only syscalls that failed"),
3703 OPT_BOOLEAN('s', "summary", &trace.summary_only,
3704 "Show only syscall summary with statistics"),
3705 OPT_BOOLEAN('S', "with-summary", &trace.summary,
3706 "Show all syscalls and summary with statistics"),
3707 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
3708 "Trace pagefaults", parse_pagefaults, "maj"),
3709 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
3710 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
3711 OPT_CALLBACK(0, "call-graph", &trace.opts,
3712 "record_mode[,record_size]", record_callchain_help,
3713 &record_parse_callchain_opt),
3714 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
3715 "Show the kernel callchains on the syscall exit path"),
3716 OPT_ULONG(0, "max-events", &trace.max_events,
3717 "Set the maximum number of events to print, exit after that is reached. "),
3718 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
3719 "Set the minimum stack depth when parsing the callchain, "
3720 "anything below the specified depth will be ignored."),
3721 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
3722 "Set the maximum stack depth when parsing the callchain, "
3723 "anything beyond the specified depth will be ignored. "
3724 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
3725 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
3726 "Sort batch of events before processing, use if getting out of order events"),
3727 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
3728 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
3729 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
3730 "per thread proc mmap processing timeout in ms"),
3731 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
3732 trace__parse_cgroups),
3733 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
3734 "ms to wait before starting measurement after program "
3738 bool __maybe_unused max_stack_user_set = true;
3739 bool mmap_pages_user_set = true;
3740 struct perf_evsel *evsel;
3741 const char * const trace_subcommands[] = { "record", NULL };
3745 signal(SIGSEGV, sighandler_dump_stack);
3746 signal(SIGFPE, sighandler_dump_stack);
3748 trace.evlist = perf_evlist__new();
3749 trace.sctbl = syscalltbl__new();
3751 if (trace.evlist == NULL || trace.sctbl == NULL) {
3752 pr_err("Not enough memory to run!\n");
3757 err = perf_config(trace__config, &trace);
3761 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
3762 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
3764 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
3765 usage_with_options_msg(trace_usage, trace_options,
3766 "cgroup monitoring only available in system-wide mode");
3769 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
3770 if (IS_ERR(evsel)) {
3771 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
3772 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
3777 trace.syscalls.events.augmented = evsel;
3778 trace__set_bpf_map_filtered_pids(&trace);
3779 trace__set_bpf_map_syscalls(&trace);
3782 err = bpf__setup_stdout(trace.evlist);
3784 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
3785 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
3791 if (trace.trace_pgfaults) {
3792 trace.opts.sample_address = true;
3793 trace.opts.sample_time = true;
3796 if (trace.opts.mmap_pages == UINT_MAX)
3797 mmap_pages_user_set = false;
3799 if (trace.max_stack == UINT_MAX) {
3800 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
3801 max_stack_user_set = false;
3804 #ifdef HAVE_DWARF_UNWIND_SUPPORT
3805 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
3806 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
3810 if (callchain_param.enabled) {
3811 if (!mmap_pages_user_set && geteuid() == 0)
3812 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
3814 symbol_conf.use_callchain = true;
3817 if (trace.evlist->nr_entries > 0) {
3818 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
3819 if (evlist__set_syscall_tp_fields(trace.evlist)) {
3820 perror("failed to set syscalls:* tracepoint fields");
3825 if (trace.sort_events) {
3826 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
3827 ordered_events__set_copy_on_queue(&trace.oe.data, true);
3831 * If we are augmenting syscalls, then combine what we put in the
3832 * __augmented_syscalls__ BPF map with what is in the
3833 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
3834 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
3836 * We'll switch to look at two BPF maps, one for sys_enter and the
3837 * other for sys_exit when we start augmenting the sys_exit paths with
3838 * buffers that are being copied from kernel to userspace, think 'read'
3841 if (trace.syscalls.events.augmented) {
3842 evlist__for_each_entry(trace.evlist, evsel) {
3843 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
3845 if (raw_syscalls_sys_exit) {
3846 trace.raw_augmented_syscalls = true;
3847 goto init_augmented_syscall_tp;
3850 if (strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_enter") == 0) {
3851 struct perf_evsel *augmented = trace.syscalls.events.augmented;
3852 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
3853 perf_evsel__init_augmented_syscall_tp_args(augmented))
3855 augmented->handler = trace__sys_enter;
3858 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
3859 struct syscall_tp *sc;
3860 init_augmented_syscall_tp:
3861 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
3865 * For now with BPF raw_augmented we hook into
3866 * raw_syscalls:sys_enter and there we get all
3867 * 6 syscall args plus the tracepoint common
3868 * fields and the syscall_nr (another long).
3869 * So we check if that is the case and if so
3870 * don't look after the sc->args_size but
3871 * always after the full raw_syscalls:sys_enter
3872 * payload, which is fixed.
3874 * We'll revisit this later to pass
3875 * s->args_size to the BPF augmenter (now
3876 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
3877 * so that it copies only what we need for each
3878 * syscall, like what happens when we use
3879 * syscalls:sys_enter_NAME, so that we reduce
3880 * the kernel/userspace traffic to just what is
3881 * needed for each syscall.
3883 if (trace.raw_augmented_syscalls)
3884 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
3885 perf_evsel__init_augmented_syscall_tp_ret(evsel);
3886 evsel->handler = trace__sys_exit;
3891 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
3892 return trace__record(&trace, argc-1, &argv[1]);
3894 /* summary_only implies summary option, but don't overwrite summary if set */
3895 if (trace.summary_only)
3896 trace.summary = trace.summary_only;
3898 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
3899 trace.evlist->nr_entries == 0 /* Was --events used? */) {
3900 trace.trace_syscalls = true;
3903 if (output_name != NULL) {
3904 err = trace__open_output(&trace, output_name);
3906 perror("failed to create output file");
3911 err = target__validate(&trace.opts.target);
3913 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
3914 fprintf(trace.output, "%s", bf);
3918 err = target__parse_uid(&trace.opts.target);
3920 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
3921 fprintf(trace.output, "%s", bf);
3925 if (!argc && target__none(&trace.opts.target))
3926 trace.opts.target.system_wide = true;
3929 err = trace__replay(&trace);
3931 err = trace__run(&trace, argc, argv);
3934 if (output_name != NULL)
3935 fclose(trace.output);