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'")
17 #include "util/record.h"
18 #include <api/fs/tracing_path.h>
19 #ifdef HAVE_LIBBPF_SUPPORT
21 #include <bpf/libbpf.h>
23 #include "bpf_skel/augmented_raw_syscalls.skel.h"
26 #include "util/bpf_map.h"
27 #include "util/rlimit.h"
29 #include "util/cgroup.h"
30 #include "util/color.h"
31 #include "util/config.h"
32 #include "util/debug.h"
35 #include "util/event.h"
36 #include "util/evsel.h"
37 #include "util/evsel_fprintf.h"
38 #include "util/synthetic-events.h"
39 #include "util/evlist.h"
40 #include "util/evswitch.h"
41 #include "util/mmap.h"
42 #include <subcmd/pager.h>
43 #include <subcmd/exec-cmd.h>
44 #include "util/machine.h"
46 #include "util/symbol.h"
47 #include "util/path.h"
48 #include "util/session.h"
49 #include "util/thread.h"
50 #include <subcmd/parse-options.h>
51 #include "util/strlist.h"
52 #include "util/intlist.h"
53 #include "util/thread_map.h"
54 #include "util/stat.h"
55 #include "util/tool.h"
56 #include "util/util.h"
57 #include "trace/beauty/beauty.h"
58 #include "trace-event.h"
59 #include "util/parse-events.h"
60 #include "util/tracepoint.h"
61 #include "callchain.h"
62 #include "print_binary.h"
64 #include "syscalltbl.h"
65 #include "rb_resort.h"
74 #include <linux/err.h>
75 #include <linux/filter.h>
76 #include <linux/kernel.h>
77 #include <linux/list_sort.h>
78 #include <linux/random.h>
79 #include <linux/stringify.h>
80 #include <linux/time64.h>
81 #include <linux/zalloc.h>
83 #include <sys/sysmacros.h>
85 #include <linux/ctype.h>
86 #include <perf/mmap.h>
88 #ifdef HAVE_LIBTRACEEVENT
89 #include <traceevent/event-parse.h>
93 # define O_CLOEXEC 02000000
96 #ifndef F_LINUX_SPECIFIC_BASE
97 # define F_LINUX_SPECIFIC_BASE 1024
100 #define RAW_SYSCALL_ARGS_NUM 6
103 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
105 struct syscall_arg_fmt {
106 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
107 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
108 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
111 u16 nr_entries; // for arrays
119 const char *sys_enter,
122 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM];
130 struct perf_tool tool;
131 struct syscalltbl *sctbl;
133 struct syscall *table;
135 struct evsel *sys_enter,
141 struct augmented_raw_syscalls_bpf *skel;
143 struct record_opts opts;
144 struct evlist *evlist;
145 struct machine *host;
146 struct thread *current;
147 struct cgroup *cgroup;
150 unsigned long nr_events;
151 unsigned long nr_events_printed;
152 unsigned long max_events;
153 struct evswitch evswitch;
154 struct strlist *ev_qualifier;
164 double duration_filter;
170 unsigned int max_stack;
171 unsigned int min_stack;
172 int raw_augmented_syscalls_args_size;
173 bool raw_augmented_syscalls;
174 bool fd_path_disabled;
176 bool not_ev_qualifier;
180 bool multiple_threads;
187 bool show_tool_stats;
189 bool libtraceevent_print;
190 bool kernel_syscallchains;
196 bool show_string_prefix;
200 char *perfconfig_events;
202 struct ordered_events data;
210 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
211 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
215 #define TP_UINT_FIELD(bits) \
216 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
219 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
228 #define TP_UINT_FIELD__SWAPPED(bits) \
229 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
232 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
233 return bswap_##bits(value);\
236 TP_UINT_FIELD__SWAPPED(16);
237 TP_UINT_FIELD__SWAPPED(32);
238 TP_UINT_FIELD__SWAPPED(64);
240 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
242 field->offset = offset;
246 field->integer = tp_field__u8;
249 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
252 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
255 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
264 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
266 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
269 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
271 return sample->raw_data + field->offset;
274 static int __tp_field__init_ptr(struct tp_field *field, int offset)
276 field->offset = offset;
277 field->pointer = tp_field__ptr;
281 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
283 return __tp_field__init_ptr(field, format_field->offset);
289 struct tp_field args, ret;
294 * The evsel->priv as used by 'perf trace'
295 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
296 * fmt: for all the other tracepoints
299 struct syscall_tp sc;
300 struct syscall_arg_fmt *fmt;
303 static struct evsel_trace *evsel_trace__new(void)
305 return zalloc(sizeof(struct evsel_trace));
308 static void evsel_trace__delete(struct evsel_trace *et)
318 * Used with raw_syscalls:sys_{enter,exit} and with the
319 * syscalls:sys_{enter,exit}_SYSCALL tracepoints
321 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
323 struct evsel_trace *et = evsel->priv;
328 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
330 if (evsel->priv == NULL) {
331 evsel->priv = evsel_trace__new();
332 if (evsel->priv == NULL)
336 return __evsel__syscall_tp(evsel);
340 * Used with all the other tracepoints.
342 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
344 struct evsel_trace *et = evsel->priv;
349 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
351 struct evsel_trace *et = evsel->priv;
353 if (evsel->priv == NULL) {
354 et = evsel->priv = evsel_trace__new();
360 if (et->fmt == NULL) {
361 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
366 return __evsel__syscall_arg_fmt(evsel);
369 evsel_trace__delete(evsel->priv);
374 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
376 struct tep_format_field *format_field = evsel__field(evsel, name);
378 if (format_field == NULL)
381 return tp_field__init_uint(field, format_field, evsel->needs_swap);
384 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
385 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
386 evsel__init_tp_uint_field(evsel, &sc->name, #name); })
388 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
390 struct tep_format_field *format_field = evsel__field(evsel, name);
392 if (format_field == NULL)
395 return tp_field__init_ptr(field, format_field);
398 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
399 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
400 evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
402 static void evsel__delete_priv(struct evsel *evsel)
405 evsel__delete(evsel);
408 static int evsel__init_syscall_tp(struct evsel *evsel)
410 struct syscall_tp *sc = evsel__syscall_tp(evsel);
413 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
414 evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
423 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
425 struct syscall_tp *sc = evsel__syscall_tp(evsel);
428 struct tep_format_field *syscall_id = evsel__field(tp, "id");
429 if (syscall_id == NULL)
430 syscall_id = evsel__field(tp, "__syscall_nr");
431 if (syscall_id == NULL ||
432 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
441 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
443 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
445 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
448 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
450 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
452 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
455 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
457 if (evsel__syscall_tp(evsel) != NULL) {
458 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
461 evsel->handler = handler;
468 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
470 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
472 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
474 evsel = evsel__newtp("syscalls", direction);
479 if (evsel__init_raw_syscall_tp(evsel, handler))
485 evsel__delete_priv(evsel);
489 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
490 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
491 fields->name.integer(&fields->name, sample); })
493 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
494 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
495 fields->name.pointer(&fields->name, sample); })
497 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
499 int idx = val - sa->offset;
501 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
502 size_t printed = scnprintf(bf, size, intfmt, val);
504 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
508 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
511 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
513 int idx = val - sa->offset;
515 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
516 size_t printed = scnprintf(bf, size, intfmt, val);
518 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
522 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
525 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
527 struct syscall_arg *arg)
529 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
532 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
533 struct syscall_arg *arg)
535 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
538 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
540 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
542 return strarray__strtoul(arg->parm, bf, size, ret);
545 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
547 return strarray__strtoul_flags(arg->parm, bf, size, ret);
550 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
552 return strarrays__strtoul(arg->parm, bf, size, ret);
555 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
557 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
560 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
565 for (i = 0; i < sas->nr_entries; ++i) {
566 struct strarray *sa = sas->entries[i];
567 int idx = val - sa->offset;
569 if (idx >= 0 && idx < sa->nr_entries) {
570 if (sa->entries[idx] == NULL)
572 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
576 printed = scnprintf(bf, size, intfmt, val);
578 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
582 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
586 for (i = 0; i < sa->nr_entries; ++i) {
587 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
588 *ret = sa->offset + i;
596 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
599 char *tok = bf, *sep, *end;
606 sep = memchr(tok, '|', size);
608 size -= sep - tok + 1;
611 while (end > tok && isspace(*end))
614 toklen = end - tok + 1;
617 while (isspace(*tok))
620 if (isalpha(*tok) || *tok == '_') {
621 if (!strarray__strtoul(sa, tok, toklen, &val))
624 val = strtoul(tok, NULL, 0);
626 *ret |= (1 << (val - 1));
636 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
640 for (i = 0; i < sas->nr_entries; ++i) {
641 struct strarray *sa = sas->entries[i];
643 if (strarray__strtoul(sa, bf, size, ret))
650 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
651 struct syscall_arg *arg)
653 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
657 #define AT_FDCWD -100
660 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
661 struct syscall_arg *arg)
664 const char *prefix = "AT_FD";
667 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
669 return syscall_arg__scnprintf_fd(bf, size, arg);
672 #define SCA_FDAT syscall_arg__scnprintf_fd_at
674 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
675 struct syscall_arg *arg);
677 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
679 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
681 return scnprintf(bf, size, "%#lx", arg->val);
684 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
687 return scnprintf(bf, size, "NULL");
688 return syscall_arg__scnprintf_hex(bf, size, arg);
691 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
693 return scnprintf(bf, size, "%d", arg->val);
696 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
698 return scnprintf(bf, size, "%ld", arg->val);
701 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
703 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
704 // fill missing comms using thread__set_comm()...
705 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
706 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
709 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
711 static const char *bpf_cmd[] = {
712 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
713 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH",
714 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID",
715 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD",
716 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID",
717 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE",
718 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH",
719 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE",
720 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE",
721 "LINK_DETACH", "PROG_BIND_MAP",
723 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
725 static const char *fsmount_flags[] = {
728 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
730 #include "trace/beauty/generated/fsconfig_arrays.c"
732 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
734 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
735 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
737 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
738 static DEFINE_STRARRAY(itimers, "ITIMER_");
740 static const char *keyctl_options[] = {
741 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
742 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
743 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
744 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
745 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
747 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
749 static const char *whences[] = { "SET", "CUR", "END",
757 static DEFINE_STRARRAY(whences, "SEEK_");
759 static const char *fcntl_cmds[] = {
760 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
761 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
762 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
765 static DEFINE_STRARRAY(fcntl_cmds, "F_");
767 static const char *fcntl_linux_specific_cmds[] = {
768 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
769 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
770 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
773 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
775 static struct strarray *fcntl_cmds_arrays[] = {
776 &strarray__fcntl_cmds,
777 &strarray__fcntl_linux_specific_cmds,
780 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
782 static const char *rlimit_resources[] = {
783 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
784 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
787 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
789 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
790 static DEFINE_STRARRAY(sighow, "SIG_");
792 static const char *clockid[] = {
793 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
794 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
795 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
797 static DEFINE_STRARRAY(clockid, "CLOCK_");
799 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
800 struct syscall_arg *arg)
802 bool show_prefix = arg->show_string_prefix;
803 const char *suffix = "_OK";
807 if (mode == F_OK) /* 0 */
808 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
810 if (mode & n##_OK) { \
811 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
821 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
826 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
828 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
829 struct syscall_arg *arg);
831 #define SCA_FILENAME syscall_arg__scnprintf_filename
833 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
834 struct syscall_arg *arg)
836 bool show_prefix = arg->show_string_prefix;
837 const char *prefix = "O_";
838 int printed = 0, flags = arg->val;
841 if (flags & O_##n) { \
842 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
851 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
856 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
858 #ifndef GRND_NONBLOCK
859 #define GRND_NONBLOCK 0x0001
862 #define GRND_RANDOM 0x0002
865 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
866 struct syscall_arg *arg)
868 bool show_prefix = arg->show_string_prefix;
869 const char *prefix = "GRND_";
870 int printed = 0, flags = arg->val;
873 if (flags & GRND_##n) { \
874 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
875 flags &= ~GRND_##n; \
883 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
888 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
890 #define STRARRAY(name, array) \
891 { .scnprintf = SCA_STRARRAY, \
892 .strtoul = STUL_STRARRAY, \
893 .parm = &strarray__##array, }
895 #define STRARRAY_FLAGS(name, array) \
896 { .scnprintf = SCA_STRARRAY_FLAGS, \
897 .strtoul = STUL_STRARRAY_FLAGS, \
898 .parm = &strarray__##array, }
900 #include "trace/beauty/arch_errno_names.c"
901 #include "trace/beauty/eventfd.c"
902 #include "trace/beauty/futex_op.c"
903 #include "trace/beauty/futex_val3.c"
904 #include "trace/beauty/mmap.c"
905 #include "trace/beauty/mode_t.c"
906 #include "trace/beauty/msg_flags.c"
907 #include "trace/beauty/open_flags.c"
908 #include "trace/beauty/perf_event_open.c"
909 #include "trace/beauty/pid.c"
910 #include "trace/beauty/sched_policy.c"
911 #include "trace/beauty/seccomp.c"
912 #include "trace/beauty/signum.c"
913 #include "trace/beauty/socket_type.c"
914 #include "trace/beauty/waitid_options.c"
916 static const struct syscall_fmt syscall_fmts[] = {
918 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
919 { .name = "arch_prctl",
920 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
921 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
923 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
924 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
925 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
927 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
928 { .name = "brk", .hexret = true,
929 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
930 { .name = "clock_gettime",
931 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
932 { .name = "clock_nanosleep",
933 .arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, },
934 { .name = "clone", .errpid = true, .nr_args = 5,
935 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
936 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
937 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
938 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
939 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
941 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
943 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
944 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
945 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
946 { .name = "epoll_ctl",
947 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
948 { .name = "eventfd2",
949 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
950 { .name = "fchmodat",
951 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
952 { .name = "fchownat",
953 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
955 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
956 .strtoul = STUL_STRARRAYS,
957 .parm = &strarrays__fcntl_cmds_arrays,
958 .show_zero = true, },
959 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
961 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
962 { .name = "fsconfig",
963 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
965 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
966 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
968 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
969 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
970 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
971 { .name = "fstat", .alias = "newfstat", },
972 { .name = "fstatat", .alias = "newfstatat", },
974 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
975 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
976 { .name = "futimesat",
977 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
978 { .name = "getitimer",
979 .arg = { [0] = STRARRAY(which, itimers), }, },
980 { .name = "getpid", .errpid = true, },
981 { .name = "getpgid", .errpid = true, },
982 { .name = "getppid", .errpid = true, },
983 { .name = "getrandom",
984 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
985 { .name = "getrlimit",
986 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
987 { .name = "getsockopt",
988 .arg = { [1] = STRARRAY(level, socket_level), }, },
989 { .name = "gettid", .errpid = true, },
992 #if defined(__i386__) || defined(__x86_64__)
994 * FIXME: Make this available to all arches.
996 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
997 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
999 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
1001 { .name = "kcmp", .nr_args = 5,
1002 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
1003 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
1004 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
1005 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
1006 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
1008 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
1010 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1012 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1014 .arg = { [2] = STRARRAY(whence, whences), }, },
1015 { .name = "lstat", .alias = "newlstat", },
1016 { .name = "madvise",
1017 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1018 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1019 { .name = "mkdirat",
1020 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1021 { .name = "mknodat",
1022 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1023 { .name = "mmap", .hexret = true,
1024 /* The standard mmap maps to old_mmap on s390x */
1025 #if defined(__s390x__)
1026 .alias = "old_mmap",
1028 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1029 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1030 .strtoul = STUL_STRARRAY_FLAGS,
1031 .parm = &strarray__mmap_flags, },
1032 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1034 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1035 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1036 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1037 { .name = "move_mount",
1038 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1039 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1040 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1041 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1042 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1043 { .name = "mprotect",
1044 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1045 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1046 { .name = "mq_unlink",
1047 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1048 { .name = "mremap", .hexret = true,
1049 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1050 { .name = "name_to_handle_at",
1051 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1052 { .name = "newfstatat",
1053 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1055 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1056 { .name = "open_by_handle_at",
1057 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1058 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1060 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1061 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1062 { .name = "perf_event_open",
1063 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ },
1064 [2] = { .scnprintf = SCA_INT, /* cpu */ },
1065 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1066 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1068 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1069 { .name = "pkey_alloc",
1070 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1071 { .name = "pkey_free",
1072 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1073 { .name = "pkey_mprotect",
1074 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1075 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1076 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1077 { .name = "poll", .timeout = true, },
1078 { .name = "ppoll", .timeout = true, },
1080 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1081 .strtoul = STUL_STRARRAY,
1082 .parm = &strarray__prctl_options, },
1083 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1084 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1085 { .name = "pread", .alias = "pread64", },
1086 { .name = "preadv", .alias = "pread", },
1087 { .name = "prlimit64",
1088 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1089 { .name = "pwrite", .alias = "pwrite64", },
1090 { .name = "readlinkat",
1091 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1092 { .name = "recvfrom",
1093 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1094 { .name = "recvmmsg",
1095 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1096 { .name = "recvmsg",
1097 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1098 { .name = "renameat",
1099 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1100 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1101 { .name = "renameat2",
1102 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1103 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1104 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1105 { .name = "rt_sigaction",
1106 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1107 { .name = "rt_sigprocmask",
1108 .arg = { [0] = STRARRAY(how, sighow), }, },
1109 { .name = "rt_sigqueueinfo",
1110 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1111 { .name = "rt_tgsigqueueinfo",
1112 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1113 { .name = "sched_setscheduler",
1114 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1115 { .name = "seccomp",
1116 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1117 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1118 { .name = "select", .timeout = true, },
1119 { .name = "sendfile", .alias = "sendfile64", },
1120 { .name = "sendmmsg",
1121 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1122 { .name = "sendmsg",
1123 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1125 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1126 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1127 { .name = "set_tid_address", .errpid = true, },
1128 { .name = "setitimer",
1129 .arg = { [0] = STRARRAY(which, itimers), }, },
1130 { .name = "setrlimit",
1131 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1132 { .name = "setsockopt",
1133 .arg = { [1] = STRARRAY(level, socket_level), }, },
1135 .arg = { [0] = STRARRAY(family, socket_families),
1136 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1137 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1138 { .name = "socketpair",
1139 .arg = { [0] = STRARRAY(family, socket_families),
1140 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1141 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1142 { .name = "stat", .alias = "newstat", },
1144 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1145 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1146 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1147 { .name = "swapoff",
1148 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1150 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1151 { .name = "symlinkat",
1152 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1153 { .name = "sync_file_range",
1154 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1156 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1158 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1159 { .name = "umount2", .alias = "umount",
1160 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1161 { .name = "uname", .alias = "newuname", },
1162 { .name = "unlinkat",
1163 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1164 { .name = "utimensat",
1165 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1166 { .name = "wait4", .errpid = true,
1167 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1168 { .name = "waitid", .errpid = true,
1169 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1172 static int syscall_fmt__cmp(const void *name, const void *fmtp)
1174 const struct syscall_fmt *fmt = fmtp;
1175 return strcmp(name, fmt->name);
1178 static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts,
1182 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1185 static const struct syscall_fmt *syscall_fmt__find(const char *name)
1187 const int nmemb = ARRAY_SIZE(syscall_fmts);
1188 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1191 static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts,
1192 const int nmemb, const char *alias)
1196 for (i = 0; i < nmemb; ++i) {
1197 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1204 static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1206 const int nmemb = ARRAY_SIZE(syscall_fmts);
1207 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1211 * is_exit: is this "exit" or "exit_group"?
1212 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1213 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1214 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1217 struct tep_event *tp_format;
1221 struct bpf_program *sys_enter,
1227 struct tep_format_field *args;
1229 const struct syscall_fmt *fmt;
1230 struct syscall_arg_fmt *arg_fmt;
1234 * We need to have this 'calculated' boolean because in some cases we really
1235 * don't know what is the duration of a syscall, for instance, when we start
1236 * a session and some threads are waiting for a syscall to finish, say 'poll',
1237 * in which case all we can do is to print "( ? ) for duration and for the
1240 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1242 double duration = (double)t / NSEC_PER_MSEC;
1243 size_t printed = fprintf(fp, "(");
1246 printed += fprintf(fp, " ");
1247 else if (duration >= 1.0)
1248 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1249 else if (duration >= 0.01)
1250 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1252 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1253 return printed + fprintf(fp, "): ");
1257 * filename.ptr: The filename char pointer that will be vfs_getname'd
1258 * filename.entry_str_pos: Where to insert the string translated from
1259 * filename.ptr by the vfs_getname tracepoint/kprobe.
1260 * ret_scnprintf: syscall args may set this to a different syscall return
1261 * formatter, for instance, fcntl may return fds, file flags, etc.
1263 struct thread_trace {
1266 unsigned long nr_events;
1267 unsigned long pfmaj, pfmin;
1270 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1273 short int entry_str_pos;
1275 unsigned int namelen;
1283 struct intlist *syscall_stats;
1286 static struct thread_trace *thread_trace__new(void)
1288 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1291 ttrace->files.max = -1;
1292 ttrace->syscall_stats = intlist__new(NULL);
1298 static void thread_trace__free_files(struct thread_trace *ttrace);
1300 static void thread_trace__delete(void *pttrace)
1302 struct thread_trace *ttrace = pttrace;
1307 intlist__delete(ttrace->syscall_stats);
1308 ttrace->syscall_stats = NULL;
1309 thread_trace__free_files(ttrace);
1310 zfree(&ttrace->entry_str);
1314 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1316 struct thread_trace *ttrace;
1321 if (thread__priv(thread) == NULL)
1322 thread__set_priv(thread, thread_trace__new());
1324 if (thread__priv(thread) == NULL)
1327 ttrace = thread__priv(thread);
1328 ++ttrace->nr_events;
1332 color_fprintf(fp, PERF_COLOR_RED,
1333 "WARNING: not enough memory, dropping samples!\n");
1338 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1339 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1341 struct thread_trace *ttrace = thread__priv(arg->thread);
1343 ttrace->ret_scnprintf = ret_scnprintf;
1346 #define TRACE_PFMAJ (1 << 0)
1347 #define TRACE_PFMIN (1 << 1)
1349 static const size_t trace__entry_str_size = 2048;
1351 static void thread_trace__free_files(struct thread_trace *ttrace)
1353 for (int i = 0; i < ttrace->files.max; ++i) {
1354 struct file *file = ttrace->files.table + i;
1355 zfree(&file->pathname);
1358 zfree(&ttrace->files.table);
1359 ttrace->files.max = -1;
1362 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1367 if (fd > ttrace->files.max) {
1368 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1373 if (ttrace->files.max != -1) {
1374 memset(nfiles + ttrace->files.max + 1, 0,
1375 (fd - ttrace->files.max) * sizeof(struct file));
1377 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1380 ttrace->files.table = nfiles;
1381 ttrace->files.max = fd;
1384 return ttrace->files.table + fd;
1387 struct file *thread__files_entry(struct thread *thread, int fd)
1389 return thread_trace__files_entry(thread__priv(thread), fd);
1392 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1394 struct thread_trace *ttrace = thread__priv(thread);
1395 struct file *file = thread_trace__files_entry(ttrace, fd);
1399 if (stat(pathname, &st) == 0)
1400 file->dev_maj = major(st.st_rdev);
1401 file->pathname = strdup(pathname);
1409 static int thread__read_fd_path(struct thread *thread, int fd)
1411 char linkname[PATH_MAX], pathname[PATH_MAX];
1415 if (thread__pid(thread) == thread__tid(thread)) {
1416 scnprintf(linkname, sizeof(linkname),
1417 "/proc/%d/fd/%d", thread__pid(thread), fd);
1419 scnprintf(linkname, sizeof(linkname),
1420 "/proc/%d/task/%d/fd/%d",
1421 thread__pid(thread), thread__tid(thread), fd);
1424 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1427 ret = readlink(linkname, pathname, sizeof(pathname));
1429 if (ret < 0 || ret > st.st_size)
1432 pathname[ret] = '\0';
1433 return trace__set_fd_pathname(thread, fd, pathname);
1436 static const char *thread__fd_path(struct thread *thread, int fd,
1437 struct trace *trace)
1439 struct thread_trace *ttrace = thread__priv(thread);
1441 if (ttrace == NULL || trace->fd_path_disabled)
1447 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1450 ++trace->stats.proc_getname;
1451 if (thread__read_fd_path(thread, fd))
1455 return ttrace->files.table[fd].pathname;
1458 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1461 size_t printed = scnprintf(bf, size, "%d", fd);
1462 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1465 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1470 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1472 size_t printed = scnprintf(bf, size, "%d", fd);
1473 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1476 const char *path = thread__fd_path(thread, fd, trace);
1479 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1481 thread__put(thread);
1487 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1488 struct syscall_arg *arg)
1491 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1492 struct thread_trace *ttrace = thread__priv(arg->thread);
1494 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1495 zfree(&ttrace->files.table[fd].pathname);
1500 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1503 struct thread_trace *ttrace = thread__priv(thread);
1505 ttrace->filename.ptr = ptr;
1506 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1509 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1511 struct augmented_arg *augmented_arg = arg->augmented.args;
1512 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1514 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1515 * we would have two strings, each prefixed by its size.
1517 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1519 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1520 arg->augmented.size -= consumed;
1525 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1526 struct syscall_arg *arg)
1528 unsigned long ptr = arg->val;
1530 if (arg->augmented.args)
1531 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1533 if (!arg->trace->vfs_getname)
1534 return scnprintf(bf, size, "%#x", ptr);
1536 thread__set_filename_pos(arg->thread, bf, ptr);
1540 static bool trace__filter_duration(struct trace *trace, double t)
1542 return t < (trace->duration_filter * NSEC_PER_MSEC);
1545 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1547 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1549 return fprintf(fp, "%10.3f ", ts);
1553 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1554 * using ttrace->entry_time for a thread that receives a sys_exit without
1555 * first having received a sys_enter ("poll" issued before tracing session
1556 * starts, lost sys_enter exit due to ring buffer overflow).
1558 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1561 return __trace__fprintf_tstamp(trace, tstamp, fp);
1563 return fprintf(fp, " ? ");
1566 static pid_t workload_pid = -1;
1567 static volatile sig_atomic_t done = false;
1568 static volatile sig_atomic_t interrupted = false;
1570 static void sighandler_interrupt(int sig __maybe_unused)
1572 done = interrupted = true;
1575 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info,
1576 void *context __maybe_unused)
1578 if (info->si_pid == workload_pid)
1582 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1586 if (trace->multiple_threads) {
1587 if (trace->show_comm)
1588 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1589 printed += fprintf(fp, "%d ", thread__tid(thread));
1595 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1596 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1600 if (trace->show_tstamp)
1601 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1602 if (trace->show_duration)
1603 printed += fprintf_duration(duration, duration_calculated, fp);
1604 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1607 static int trace__process_event(struct trace *trace, struct machine *machine,
1608 union perf_event *event, struct perf_sample *sample)
1612 switch (event->header.type) {
1613 case PERF_RECORD_LOST:
1614 color_fprintf(trace->output, PERF_COLOR_RED,
1615 "LOST %" PRIu64 " events!\n", event->lost.lost);
1616 ret = machine__process_lost_event(machine, event, sample);
1619 ret = machine__process_event(machine, event, sample);
1626 static int trace__tool_process(struct perf_tool *tool,
1627 union perf_event *event,
1628 struct perf_sample *sample,
1629 struct machine *machine)
1631 struct trace *trace = container_of(tool, struct trace, tool);
1632 return trace__process_event(trace, machine, event, sample);
1635 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1637 struct machine *machine = vmachine;
1639 if (machine->kptr_restrict_warned)
1642 if (symbol_conf.kptr_restrict) {
1643 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1644 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1645 "Kernel samples will not be resolved.\n");
1646 machine->kptr_restrict_warned = true;
1650 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1653 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1655 int err = symbol__init(NULL);
1660 trace->host = machine__new_host();
1661 if (trace->host == NULL)
1664 thread__set_priv_destructor(thread_trace__delete);
1666 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1670 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1671 evlist->core.threads, trace__tool_process,
1680 static void trace__symbols__exit(struct trace *trace)
1682 machine__exit(trace->host);
1688 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1692 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0)
1693 nr_args = sc->fmt->nr_args;
1695 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1696 if (sc->arg_fmt == NULL)
1699 for (idx = 0; idx < nr_args; ++idx) {
1701 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1704 sc->nr_args = nr_args;
1708 static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1709 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1710 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1713 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1715 const struct syscall_arg_fmt *fmt = fmtp;
1716 return strcmp(name, fmt->name);
1719 static const struct syscall_arg_fmt *
1720 __syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb,
1723 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1726 static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1728 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1729 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1732 static struct tep_format_field *
1733 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1735 struct tep_format_field *last_field = NULL;
1738 for (; field; field = field->next, ++arg) {
1744 len = strlen(field->name);
1746 if (strcmp(field->type, "const char *") == 0 &&
1747 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1748 strstr(field->name, "path") != NULL))
1749 arg->scnprintf = SCA_FILENAME;
1750 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1751 arg->scnprintf = SCA_PTR;
1752 else if (strcmp(field->type, "pid_t") == 0)
1753 arg->scnprintf = SCA_PID;
1754 else if (strcmp(field->type, "umode_t") == 0)
1755 arg->scnprintf = SCA_MODE_T;
1756 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1757 arg->scnprintf = SCA_CHAR_ARRAY;
1758 arg->nr_entries = field->arraylen;
1759 } else if ((strcmp(field->type, "int") == 0 ||
1760 strcmp(field->type, "unsigned int") == 0 ||
1761 strcmp(field->type, "long") == 0) &&
1762 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1764 * /sys/kernel/tracing/events/syscalls/sys_enter*
1765 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1770 arg->scnprintf = SCA_FD;
1772 const struct syscall_arg_fmt *fmt =
1773 syscall_arg_fmt__find_by_name(field->name);
1776 arg->scnprintf = fmt->scnprintf;
1777 arg->strtoul = fmt->strtoul;
1785 static int syscall__set_arg_fmts(struct syscall *sc)
1787 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1790 sc->args_size = last_field->offset + last_field->size;
1795 static int trace__read_syscall_info(struct trace *trace, int id)
1799 const char *name = syscalltbl__name(trace->sctbl, id);
1801 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
1802 if (trace->syscalls.table == NULL) {
1803 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1804 if (trace->syscalls.table == NULL)
1808 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
1809 // When using libaudit we don't know beforehand what is the max syscall id
1810 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1815 // Need to memset from offset 0 and +1 members if brand new
1816 if (trace->syscalls.table == NULL)
1817 memset(table, 0, (id + 1) * sizeof(*sc));
1819 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1821 trace->syscalls.table = table;
1822 trace->sctbl->syscalls.max_id = id;
1825 sc = trace->syscalls.table + id;
1826 if (sc->nonexistent)
1830 sc->nonexistent = true;
1835 sc->fmt = syscall_fmt__find(sc->name);
1837 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1838 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1840 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1841 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1842 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1846 * Fails to read trace point format via sysfs node, so the trace point
1847 * doesn't exist. Set the 'nonexistent' flag as true.
1849 if (IS_ERR(sc->tp_format)) {
1850 sc->nonexistent = true;
1851 return PTR_ERR(sc->tp_format);
1854 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ?
1855 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields))
1858 sc->args = sc->tp_format->format.fields;
1860 * We need to check and discard the first variable '__syscall_nr'
1861 * or 'nr' that mean the syscall number. It is needless here.
1862 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1864 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1865 sc->args = sc->args->next;
1869 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1870 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1872 return syscall__set_arg_fmts(sc);
1875 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1877 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1880 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1887 static int intcmp(const void *a, const void *b)
1889 const int *one = a, *another = b;
1891 return *one - *another;
1894 static int trace__validate_ev_qualifier(struct trace *trace)
1897 bool printed_invalid_prefix = false;
1898 struct str_node *pos;
1899 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1901 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1902 sizeof(trace->ev_qualifier_ids.entries[0]));
1904 if (trace->ev_qualifier_ids.entries == NULL) {
1905 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1911 strlist__for_each_entry(pos, trace->ev_qualifier) {
1912 const char *sc = pos->s;
1913 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1916 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1920 if (!printed_invalid_prefix) {
1921 pr_debug("Skipping unknown syscalls: ");
1922 printed_invalid_prefix = true;
1931 trace->ev_qualifier_ids.entries[nr_used++] = id;
1932 if (match_next == -1)
1936 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1939 if (nr_allocated == nr_used) {
1943 entries = realloc(trace->ev_qualifier_ids.entries,
1944 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1945 if (entries == NULL) {
1947 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1950 trace->ev_qualifier_ids.entries = entries;
1952 trace->ev_qualifier_ids.entries[nr_used++] = id;
1956 trace->ev_qualifier_ids.nr = nr_used;
1957 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1959 if (printed_invalid_prefix)
1963 zfree(&trace->ev_qualifier_ids.entries);
1964 trace->ev_qualifier_ids.nr = 0;
1968 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1970 bool in_ev_qualifier;
1972 if (trace->ev_qualifier_ids.nr == 0)
1975 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1976 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1978 if (in_ev_qualifier)
1979 return !trace->not_ev_qualifier;
1981 return trace->not_ev_qualifier;
1985 * args is to be interpreted as a series of longs but we need to handle
1986 * 8-byte unaligned accesses. args points to raw_data within the event
1987 * and raw_data is guaranteed to be 8-byte unaligned because it is
1988 * preceded by raw_size which is a u32. So we need to copy args to a temp
1989 * variable to read it. Most notably this avoids extended load instructions
1990 * on unaligned addresses
1992 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1995 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1997 memcpy(&val, p, sizeof(val));
2001 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
2002 struct syscall_arg *arg)
2004 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
2005 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
2007 return scnprintf(bf, size, "arg%d: ", arg->idx);
2011 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
2012 * as mount 'flags' argument that needs ignoring some magic flag, see comment
2013 * in tools/perf/trace/beauty/mount_flags.c
2015 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
2017 if (fmt && fmt->mask_val)
2018 return fmt->mask_val(arg, val);
2023 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
2024 struct syscall_arg *arg, unsigned long val)
2026 if (fmt && fmt->scnprintf) {
2029 arg->parm = fmt->parm;
2030 return fmt->scnprintf(bf, size, arg);
2032 return scnprintf(bf, size, "%ld", val);
2035 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
2036 unsigned char *args, void *augmented_args, int augmented_args_size,
2037 struct trace *trace, struct thread *thread)
2042 struct syscall_arg arg = {
2045 .size = augmented_args_size,
2046 .args = augmented_args,
2052 .show_string_prefix = trace->show_string_prefix,
2054 struct thread_trace *ttrace = thread__priv(thread);
2057 * Things like fcntl will set this in its 'cmd' formatter to pick the
2058 * right formatter for the return value (an fd? file flags?), which is
2059 * not needed for syscalls that always return a given type, say an fd.
2061 ttrace->ret_scnprintf = NULL;
2063 if (sc->args != NULL) {
2064 struct tep_format_field *field;
2066 for (field = sc->args; field;
2067 field = field->next, ++arg.idx, bit <<= 1) {
2071 arg.fmt = &sc->arg_fmt[arg.idx];
2072 val = syscall_arg__val(&arg, arg.idx);
2074 * Some syscall args need some mask, most don't and
2075 * return val untouched.
2077 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2080 * Suppress this argument if its value is zero and
2081 * and we don't have a string associated in an
2085 !trace->show_zeros &&
2087 (sc->arg_fmt[arg.idx].show_zero ||
2088 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2089 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2090 sc->arg_fmt[arg.idx].parm))
2093 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2095 if (trace->show_arg_names)
2096 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2098 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2099 bf + printed, size - printed, &arg, val);
2101 } else if (IS_ERR(sc->tp_format)) {
2103 * If we managed to read the tracepoint /format file, then we
2104 * may end up not having any args, like with gettid(), so only
2105 * print the raw args when we didn't manage to read it.
2107 while (arg.idx < sc->nr_args) {
2110 val = syscall_arg__val(&arg, arg.idx);
2112 printed += scnprintf(bf + printed, size - printed, ", ");
2113 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2114 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2124 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2125 union perf_event *event,
2126 struct perf_sample *sample);
2128 static struct syscall *trace__syscall_info(struct trace *trace,
2129 struct evsel *evsel, int id)
2136 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2137 * before that, leaving at a higher verbosity level till that is
2138 * explained. Reproduced with plain ftrace with:
2140 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2141 * grep "NR -1 " /t/trace_pipe
2143 * After generating some load on the machine.
2147 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2148 id, evsel__name(evsel), ++n);
2155 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
2156 if (id > trace->sctbl->syscalls.max_id) {
2158 if (id >= trace->sctbl->syscalls.max_id) {
2160 * With libaudit we don't know beforehand what is the max_id,
2161 * so we let trace__read_syscall_info() figure that out as we
2162 * go on reading syscalls.
2164 err = trace__read_syscall_info(trace, id);
2170 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2171 (err = trace__read_syscall_info(trace, id)) != 0)
2174 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
2177 return &trace->syscalls.table[id];
2181 char sbuf[STRERR_BUFSIZE];
2182 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2183 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2184 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2185 fputs(" information\n", trace->output);
2190 struct syscall_stats {
2197 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2198 int id, struct perf_sample *sample, long err, bool errno_summary)
2200 struct int_node *inode;
2201 struct syscall_stats *stats;
2204 inode = intlist__findnew(ttrace->syscall_stats, id);
2208 stats = inode->priv;
2209 if (stats == NULL) {
2210 stats = zalloc(sizeof(*stats));
2214 init_stats(&stats->stats);
2215 inode->priv = stats;
2218 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2219 duration = sample->time - ttrace->entry_time;
2221 update_stats(&stats->stats, duration);
2224 ++stats->nr_failures;
2230 if (err > stats->max_errno) {
2231 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2234 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2236 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2237 thread__comm_str(thread), thread__pid(thread),
2238 thread__tid(thread));
2242 stats->errnos = new_errnos;
2243 stats->max_errno = err;
2246 ++stats->errnos[err - 1];
2250 static int trace__printf_interrupted_entry(struct trace *trace)
2252 struct thread_trace *ttrace;
2256 if (trace->failure_only || trace->current == NULL)
2259 ttrace = thread__priv(trace->current);
2261 if (!ttrace->entry_pending)
2264 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2265 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2267 if (len < trace->args_alignment - 4)
2268 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2270 printed += fprintf(trace->output, " ...\n");
2272 ttrace->entry_pending = false;
2273 ++trace->nr_events_printed;
2278 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2279 struct perf_sample *sample, struct thread *thread)
2283 if (trace->print_sample) {
2284 double ts = (double)sample->time / NSEC_PER_MSEC;
2286 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2287 evsel__name(evsel), ts,
2288 thread__comm_str(thread),
2289 sample->pid, sample->tid, sample->cpu);
2295 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2297 void *augmented_args = NULL;
2299 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2300 * and there we get all 6 syscall args plus the tracepoint common fields
2301 * that gets calculated at the start and the syscall_nr (another long).
2302 * So we check if that is the case and if so don't look after the
2303 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2306 * We'll revisit this later to pass s->args_size to the BPF augmenter
2307 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2308 * copies only what we need for each syscall, like what happens when we
2309 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2310 * traffic to just what is needed for each syscall.
2312 int args_size = raw_augmented_args_size ?: sc->args_size;
2314 *augmented_args_size = sample->raw_size - args_size;
2315 if (*augmented_args_size > 0)
2316 augmented_args = sample->raw_data + args_size;
2318 return augmented_args;
2321 static void syscall__exit(struct syscall *sc)
2326 zfree(&sc->arg_fmt);
2329 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2330 union perf_event *event __maybe_unused,
2331 struct perf_sample *sample)
2336 struct thread *thread;
2337 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2338 int augmented_args_size = 0;
2339 void *augmented_args = NULL;
2340 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2341 struct thread_trace *ttrace;
2346 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2347 ttrace = thread__trace(thread, trace->output);
2351 trace__fprintf_sample(trace, evsel, sample, thread);
2353 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2355 if (ttrace->entry_str == NULL) {
2356 ttrace->entry_str = malloc(trace__entry_str_size);
2357 if (!ttrace->entry_str)
2361 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2362 trace__printf_interrupted_entry(trace);
2364 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2365 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2366 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2367 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2368 * so when handling, say the openat syscall, we end up getting 6 args for the
2369 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2370 * thinking that the extra 2 u64 args are the augmented filename, so just check
2371 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2373 if (evsel != trace->syscalls.events.sys_enter)
2374 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2375 ttrace->entry_time = sample->time;
2376 msg = ttrace->entry_str;
2377 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2379 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2380 args, augmented_args, augmented_args_size, trace, thread);
2383 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2386 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2387 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2388 if (trace->args_alignment > printed)
2389 alignment = trace->args_alignment - printed;
2390 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2393 ttrace->entry_pending = true;
2394 /* See trace__vfs_getname & trace__sys_exit */
2395 ttrace->filename.pending_open = false;
2398 if (trace->current != thread) {
2399 thread__put(trace->current);
2400 trace->current = thread__get(thread);
2404 thread__put(thread);
2408 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2409 struct perf_sample *sample)
2411 struct thread_trace *ttrace;
2412 struct thread *thread;
2413 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2414 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2416 void *args, *augmented_args = NULL;
2417 int augmented_args_size;
2422 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2423 ttrace = thread__trace(thread, trace->output);
2425 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2426 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2431 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2432 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2433 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2434 fprintf(trace->output, "%s", msg);
2437 thread__put(thread);
2441 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2442 struct perf_sample *sample,
2443 struct callchain_cursor *cursor)
2445 struct addr_location al;
2446 int max_stack = evsel->core.attr.sample_max_stack ?
2447 evsel->core.attr.sample_max_stack :
2451 addr_location__init(&al);
2452 if (machine__resolve(trace->host, &al, sample) < 0)
2455 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2457 addr_location__exit(&al);
2461 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2463 /* TODO: user-configurable print_opts */
2464 const unsigned int print_opts = EVSEL__PRINT_SYM |
2466 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2468 return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output);
2471 static const char *errno_to_name(struct evsel *evsel, int err)
2473 struct perf_env *env = evsel__env(evsel);
2475 return perf_env__arch_strerrno(env, err);
2478 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2479 union perf_event *event __maybe_unused,
2480 struct perf_sample *sample)
2484 bool duration_calculated = false;
2485 struct thread *thread;
2486 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2487 int alignment = trace->args_alignment;
2488 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2489 struct thread_trace *ttrace;
2494 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2495 ttrace = thread__trace(thread, trace->output);
2499 trace__fprintf_sample(trace, evsel, sample, thread);
2501 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2504 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2506 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2507 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2508 ttrace->filename.pending_open = false;
2509 ++trace->stats.vfs_getname;
2512 if (ttrace->entry_time) {
2513 duration = sample->time - ttrace->entry_time;
2514 if (trace__filter_duration(trace, duration))
2516 duration_calculated = true;
2517 } else if (trace->duration_filter)
2520 if (sample->callchain) {
2521 struct callchain_cursor *cursor = get_tls_callchain_cursor();
2523 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2524 if (callchain_ret == 0) {
2525 if (cursor->nr < trace->min_stack)
2531 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2534 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2536 if (ttrace->entry_pending) {
2537 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2539 printed += fprintf(trace->output, " ... [");
2540 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2542 printed += fprintf(trace->output, "]: %s()", sc->name);
2545 printed++; /* the closing ')' */
2547 if (alignment > printed)
2548 alignment -= printed;
2552 fprintf(trace->output, ")%*s= ", alignment, " ");
2554 if (sc->fmt == NULL) {
2558 fprintf(trace->output, "%ld", ret);
2559 } else if (ret < 0) {
2561 char bf[STRERR_BUFSIZE];
2562 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2563 *e = errno_to_name(evsel, -ret);
2565 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2567 } else if (ret == 0 && sc->fmt->timeout)
2568 fprintf(trace->output, "0 (Timeout)");
2569 else if (ttrace->ret_scnprintf) {
2571 struct syscall_arg arg = {
2576 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2577 ttrace->ret_scnprintf = NULL;
2578 fprintf(trace->output, "%s", bf);
2579 } else if (sc->fmt->hexret)
2580 fprintf(trace->output, "%#lx", ret);
2581 else if (sc->fmt->errpid) {
2582 struct thread *child = machine__find_thread(trace->host, ret, ret);
2584 if (child != NULL) {
2585 fprintf(trace->output, "%ld", ret);
2586 if (thread__comm_set(child))
2587 fprintf(trace->output, " (%s)", thread__comm_str(child));
2593 fputc('\n', trace->output);
2596 * We only consider an 'event' for the sake of --max-events a non-filtered
2597 * sys_enter + sys_exit and other tracepoint events.
2599 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2602 if (callchain_ret > 0)
2603 trace__fprintf_callchain(trace, sample);
2604 else if (callchain_ret < 0)
2605 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2607 ttrace->entry_pending = false;
2610 thread__put(thread);
2614 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2615 union perf_event *event __maybe_unused,
2616 struct perf_sample *sample)
2618 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2619 struct thread_trace *ttrace;
2620 size_t filename_len, entry_str_len, to_move;
2621 ssize_t remaining_space;
2623 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2628 ttrace = thread__priv(thread);
2632 filename_len = strlen(filename);
2633 if (filename_len == 0)
2636 if (ttrace->filename.namelen < filename_len) {
2637 char *f = realloc(ttrace->filename.name, filename_len + 1);
2642 ttrace->filename.namelen = filename_len;
2643 ttrace->filename.name = f;
2646 strcpy(ttrace->filename.name, filename);
2647 ttrace->filename.pending_open = true;
2649 if (!ttrace->filename.ptr)
2652 entry_str_len = strlen(ttrace->entry_str);
2653 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2654 if (remaining_space <= 0)
2657 if (filename_len > (size_t)remaining_space) {
2658 filename += filename_len - remaining_space;
2659 filename_len = remaining_space;
2662 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2663 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2664 memmove(pos + filename_len, pos, to_move);
2665 memcpy(pos, filename, filename_len);
2667 ttrace->filename.ptr = 0;
2668 ttrace->filename.entry_str_pos = 0;
2670 thread__put(thread);
2675 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2676 union perf_event *event __maybe_unused,
2677 struct perf_sample *sample)
2679 u64 runtime = evsel__intval(evsel, sample, "runtime");
2680 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2681 struct thread *thread = machine__findnew_thread(trace->host,
2684 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2689 ttrace->runtime_ms += runtime_ms;
2690 trace->runtime_ms += runtime_ms;
2692 thread__put(thread);
2696 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2698 evsel__strval(evsel, sample, "comm"),
2699 (pid_t)evsel__intval(evsel, sample, "pid"),
2701 evsel__intval(evsel, sample, "vruntime"));
2705 static int bpf_output__printer(enum binary_printer_ops op,
2706 unsigned int val, void *extra __maybe_unused, FILE *fp)
2708 unsigned char ch = (unsigned char)val;
2711 case BINARY_PRINT_CHAR_DATA:
2712 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2713 case BINARY_PRINT_DATA_BEGIN:
2714 case BINARY_PRINT_LINE_BEGIN:
2715 case BINARY_PRINT_ADDR:
2716 case BINARY_PRINT_NUM_DATA:
2717 case BINARY_PRINT_NUM_PAD:
2718 case BINARY_PRINT_SEP:
2719 case BINARY_PRINT_CHAR_PAD:
2720 case BINARY_PRINT_LINE_END:
2721 case BINARY_PRINT_DATA_END:
2729 static void bpf_output__fprintf(struct trace *trace,
2730 struct perf_sample *sample)
2732 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2733 bpf_output__printer, NULL, trace->output);
2734 ++trace->nr_events_printed;
2737 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2738 struct thread *thread, void *augmented_args, int augmented_args_size)
2741 size_t size = sizeof(bf);
2742 struct tep_format_field *field = evsel->tp_format->format.fields;
2743 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2747 struct syscall_arg syscall_arg = {
2749 .size = augmented_args_size,
2750 .args = augmented_args,
2756 .show_string_prefix = trace->show_string_prefix,
2759 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2760 if (syscall_arg.mask & bit)
2763 syscall_arg.len = 0;
2764 syscall_arg.fmt = arg;
2765 if (field->flags & TEP_FIELD_IS_ARRAY) {
2766 int offset = field->offset;
2768 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2769 offset = format_field__intval(field, sample, evsel->needs_swap);
2770 syscall_arg.len = offset >> 16;
2772 if (tep_field_is_relative(field->flags))
2773 offset += field->offset + field->size;
2776 val = (uintptr_t)(sample->raw_data + offset);
2778 val = format_field__intval(field, sample, evsel->needs_swap);
2780 * Some syscall args need some mask, most don't and
2781 * return val untouched.
2783 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2786 * Suppress this argument if its value is zero and
2787 * we don't have a string associated in an
2791 !trace->show_zeros &&
2792 !((arg->show_zero ||
2793 arg->scnprintf == SCA_STRARRAY ||
2794 arg->scnprintf == SCA_STRARRAYS) &&
2798 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2800 if (trace->show_arg_names)
2801 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2803 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2806 return printed + fprintf(trace->output, "%s", bf);
2809 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2810 union perf_event *event __maybe_unused,
2811 struct perf_sample *sample)
2813 struct thread *thread;
2814 int callchain_ret = 0;
2816 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2817 * this event's max_events having been hit and this is an entry coming
2818 * from the ring buffer that we should discard, since the max events
2819 * have already been considered/printed.
2821 if (evsel->disabled)
2824 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2826 if (sample->callchain) {
2827 struct callchain_cursor *cursor = get_tls_callchain_cursor();
2829 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2830 if (callchain_ret == 0) {
2831 if (cursor->nr < trace->min_stack)
2837 trace__printf_interrupted_entry(trace);
2838 trace__fprintf_tstamp(trace, sample->time, trace->output);
2840 if (trace->trace_syscalls && trace->show_duration)
2841 fprintf(trace->output, "( ): ");
2844 trace__fprintf_comm_tid(trace, thread, trace->output);
2846 if (evsel == trace->syscalls.events.bpf_output) {
2847 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2848 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2851 fprintf(trace->output, "%s(", sc->name);
2852 trace__fprintf_sys_enter(trace, evsel, sample);
2853 fputc(')', trace->output);
2858 * XXX: Not having the associated syscall info or not finding/adding
2859 * the thread should never happen, but if it does...
2860 * fall thru and print it as a bpf_output event.
2864 fprintf(trace->output, "%s(", evsel->name);
2866 if (evsel__is_bpf_output(evsel)) {
2867 bpf_output__fprintf(trace, sample);
2868 } else if (evsel->tp_format) {
2869 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2870 trace__fprintf_sys_enter(trace, evsel, sample)) {
2871 if (trace->libtraceevent_print) {
2872 event_format__fprintf(evsel->tp_format, sample->cpu,
2873 sample->raw_data, sample->raw_size,
2876 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2882 fprintf(trace->output, ")\n");
2884 if (callchain_ret > 0)
2885 trace__fprintf_callchain(trace, sample);
2886 else if (callchain_ret < 0)
2887 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2889 ++trace->nr_events_printed;
2891 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2892 evsel__disable(evsel);
2893 evsel__close(evsel);
2896 thread__put(thread);
2900 static void print_location(FILE *f, struct perf_sample *sample,
2901 struct addr_location *al,
2902 bool print_dso, bool print_sym)
2905 if ((verbose > 0 || print_dso) && al->map)
2906 fprintf(f, "%s@", map__dso(al->map)->long_name);
2908 if ((verbose > 0 || print_sym) && al->sym)
2909 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2910 al->addr - al->sym->start);
2912 fprintf(f, "0x%" PRIx64, al->addr);
2914 fprintf(f, "0x%" PRIx64, sample->addr);
2917 static int trace__pgfault(struct trace *trace,
2918 struct evsel *evsel,
2919 union perf_event *event __maybe_unused,
2920 struct perf_sample *sample)
2922 struct thread *thread;
2923 struct addr_location al;
2924 char map_type = 'd';
2925 struct thread_trace *ttrace;
2927 int callchain_ret = 0;
2929 addr_location__init(&al);
2930 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2932 if (sample->callchain) {
2933 struct callchain_cursor *cursor = get_tls_callchain_cursor();
2935 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2936 if (callchain_ret == 0) {
2937 if (cursor->nr < trace->min_stack)
2943 ttrace = thread__trace(thread, trace->output);
2947 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2952 if (trace->summary_only)
2955 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2957 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2959 fprintf(trace->output, "%sfault [",
2960 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2963 print_location(trace->output, sample, &al, false, true);
2965 fprintf(trace->output, "] => ");
2967 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2970 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2978 print_location(trace->output, sample, &al, true, false);
2980 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2982 if (callchain_ret > 0)
2983 trace__fprintf_callchain(trace, sample);
2984 else if (callchain_ret < 0)
2985 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2987 ++trace->nr_events_printed;
2991 thread__put(thread);
2992 addr_location__exit(&al);
2996 static void trace__set_base_time(struct trace *trace,
2997 struct evsel *evsel,
2998 struct perf_sample *sample)
3001 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
3002 * and don't use sample->time unconditionally, we may end up having
3003 * some other event in the future without PERF_SAMPLE_TIME for good
3004 * reason, i.e. we may not be interested in its timestamps, just in
3005 * it taking place, picking some piece of information when it
3006 * appears in our event stream (vfs_getname comes to mind).
3008 if (trace->base_time == 0 && !trace->full_time &&
3009 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
3010 trace->base_time = sample->time;
3013 static int trace__process_sample(struct perf_tool *tool,
3014 union perf_event *event,
3015 struct perf_sample *sample,
3016 struct evsel *evsel,
3017 struct machine *machine __maybe_unused)
3019 struct trace *trace = container_of(tool, struct trace, tool);
3020 struct thread *thread;
3023 tracepoint_handler handler = evsel->handler;
3025 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3026 if (thread && thread__is_filtered(thread))
3029 trace__set_base_time(trace, evsel, sample);
3033 handler(trace, evsel, event, sample);
3036 thread__put(thread);
3040 static int trace__record(struct trace *trace, int argc, const char **argv)
3042 unsigned int rec_argc, i, j;
3043 const char **rec_argv;
3044 const char * const record_args[] = {
3050 pid_t pid = getpid();
3051 char *filter = asprintf__tp_filter_pids(1, &pid);
3052 const char * const sc_args[] = { "-e", };
3053 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
3054 const char * const majpf_args[] = { "-e", "major-faults" };
3055 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
3056 const char * const minpf_args[] = { "-e", "minor-faults" };
3057 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
3060 /* +3 is for the event string below and the pid filter */
3061 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3062 majpf_args_nr + minpf_args_nr + argc;
3063 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3065 if (rec_argv == NULL || filter == NULL)
3069 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3070 rec_argv[j++] = record_args[i];
3072 if (trace->trace_syscalls) {
3073 for (i = 0; i < sc_args_nr; i++)
3074 rec_argv[j++] = sc_args[i];
3076 /* event string may be different for older kernels - e.g., RHEL6 */
3077 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3078 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3079 else if (is_valid_tracepoint("syscalls:sys_enter"))
3080 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3082 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3087 rec_argv[j++] = "--filter";
3088 rec_argv[j++] = filter;
3090 if (trace->trace_pgfaults & TRACE_PFMAJ)
3091 for (i = 0; i < majpf_args_nr; i++)
3092 rec_argv[j++] = majpf_args[i];
3094 if (trace->trace_pgfaults & TRACE_PFMIN)
3095 for (i = 0; i < minpf_args_nr; i++)
3096 rec_argv[j++] = minpf_args[i];
3098 for (i = 0; i < (unsigned int)argc; i++)
3099 rec_argv[j++] = argv[i];
3101 err = cmd_record(j, rec_argv);
3108 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3110 static bool evlist__add_vfs_getname(struct evlist *evlist)
3113 struct evsel *evsel, *tmp;
3114 struct parse_events_error err;
3117 parse_events_error__init(&err);
3118 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3119 parse_events_error__exit(&err);
3123 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3124 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3127 if (evsel__field(evsel, "pathname")) {
3128 evsel->handler = trace__vfs_getname;
3133 list_del_init(&evsel->core.node);
3134 evsel->evlist = NULL;
3135 evsel__delete(evsel);
3141 static struct evsel *evsel__new_pgfault(u64 config)
3143 struct evsel *evsel;
3144 struct perf_event_attr attr = {
3145 .type = PERF_TYPE_SOFTWARE,
3149 attr.config = config;
3150 attr.sample_period = 1;
3152 event_attr_init(&attr);
3154 evsel = evsel__new(&attr);
3156 evsel->handler = trace__pgfault;
3161 static void evlist__free_syscall_tp_fields(struct evlist *evlist)
3163 struct evsel *evsel;
3165 evlist__for_each_entry(evlist, evsel) {
3166 evsel_trace__delete(evsel->priv);
3171 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3173 const u32 type = event->header.type;
3174 struct evsel *evsel;
3176 if (type != PERF_RECORD_SAMPLE) {
3177 trace__process_event(trace, trace->host, event, sample);
3181 evsel = evlist__id2evsel(trace->evlist, sample->id);
3182 if (evsel == NULL) {
3183 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3187 if (evswitch__discard(&trace->evswitch, evsel))
3190 trace__set_base_time(trace, evsel, sample);
3192 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3193 sample->raw_data == NULL) {
3194 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3195 evsel__name(evsel), sample->tid,
3196 sample->cpu, sample->raw_size);
3198 tracepoint_handler handler = evsel->handler;
3199 handler(trace, evsel, event, sample);
3202 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3206 static int trace__add_syscall_newtp(struct trace *trace)
3209 struct evlist *evlist = trace->evlist;
3210 struct evsel *sys_enter, *sys_exit;
3212 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3213 if (sys_enter == NULL)
3216 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3217 goto out_delete_sys_enter;
3219 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3220 if (sys_exit == NULL)
3221 goto out_delete_sys_enter;
3223 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3224 goto out_delete_sys_exit;
3226 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3227 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3229 evlist__add(evlist, sys_enter);
3230 evlist__add(evlist, sys_exit);
3232 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3234 * We're interested only in the user space callchain
3235 * leading to the syscall, allow overriding that for
3236 * debugging reasons using --kernel_syscall_callchains
3238 sys_exit->core.attr.exclude_callchain_kernel = 1;
3241 trace->syscalls.events.sys_enter = sys_enter;
3242 trace->syscalls.events.sys_exit = sys_exit;
3248 out_delete_sys_exit:
3249 evsel__delete_priv(sys_exit);
3250 out_delete_sys_enter:
3251 evsel__delete_priv(sys_enter);
3255 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3258 struct evsel *sys_exit;
3259 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3260 trace->ev_qualifier_ids.nr,
3261 trace->ev_qualifier_ids.entries);
3266 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3267 sys_exit = trace->syscalls.events.sys_exit;
3268 err = evsel__append_tp_filter(sys_exit, filter);
3279 #ifdef HAVE_BPF_SKEL
3280 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3282 struct bpf_program *pos, *prog = NULL;
3283 const char *sec_name;
3285 if (trace->skel->obj == NULL)
3288 bpf_object__for_each_program(pos, trace->skel->obj) {
3289 sec_name = bpf_program__section_name(pos);
3290 if (sec_name && !strcmp(sec_name, name)) {
3299 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3300 const char *prog_name, const char *type)
3302 struct bpf_program *prog;
3304 if (prog_name == NULL) {
3305 char default_prog_name[256];
3306 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name);
3307 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3310 if (sc->fmt && sc->fmt->alias) {
3311 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias);
3312 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3316 goto out_unaugmented;
3319 prog = trace__find_bpf_program_by_title(trace, prog_name);
3326 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3327 prog_name, type, sc->name);
3329 return trace->skel->progs.syscall_unaugmented;
3332 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3334 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3339 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3340 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3343 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3345 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3346 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3349 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3351 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3352 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3355 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3357 struct tep_format_field *field, *candidate_field;
3361 * We're only interested in syscalls that have a pointer:
3363 for (field = sc->args; field; field = field->next) {
3364 if (field->flags & TEP_FIELD_IS_POINTER)
3365 goto try_to_find_pair;
3371 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3372 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3373 struct bpf_program *pair_prog;
3374 bool is_candidate = false;
3376 if (pair == NULL || pair == sc ||
3377 pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
3380 for (field = sc->args, candidate_field = pair->args;
3381 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3382 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3383 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3386 if (!candidate_is_pointer) {
3387 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3391 if (candidate_is_pointer) {
3392 // The candidate might copy a pointer we don't have, skip it.
3393 goto next_candidate;
3398 if (strcmp(field->type, candidate_field->type))
3399 goto next_candidate;
3402 * This is limited in the BPF program but sys_write
3403 * uses "const char *" for its "buf" arg so we need to
3404 * use some heuristic that is kinda future proof...
3406 if (strcmp(field->type, "const char *") == 0 &&
3407 !(strstr(field->name, "name") ||
3408 strstr(field->name, "path") ||
3409 strstr(field->name, "file") ||
3410 strstr(field->name, "root") ||
3411 strstr(field->name, "description")))
3412 goto next_candidate;
3414 is_candidate = true;
3418 goto next_candidate;
3421 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3422 * then it may be collecting that and we then can't use it, as it would collect
3423 * more than what is common to the two syscalls.
3425 if (candidate_field) {
3426 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3427 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3428 goto next_candidate;
3431 pair_prog = pair->bpf_prog.sys_enter;
3433 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3434 * have been searched for, so search it here and if it returns the
3435 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3436 * program for a filtered syscall on a non-filtered one.
3438 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3439 * useful for "renameat2".
3441 if (pair_prog == NULL) {
3442 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3443 if (pair_prog == trace->skel->progs.syscall_unaugmented)
3444 goto next_candidate;
3447 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3456 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3458 int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter);
3459 int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit);
3462 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3465 if (!trace__syscall_enabled(trace, key))
3468 trace__init_syscall_bpf_progs(trace, key);
3470 // It'll get at least the "!raw_syscalls:unaugmented"
3471 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3472 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3475 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3476 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3482 * Now lets do a second pass looking for enabled syscalls without
3483 * an augmenter that have a signature that is a superset of another
3484 * syscall with an augmenter so that we can auto-reuse it.
3486 * I.e. if we have an augmenter for the "open" syscall that has
3489 * int open(const char *pathname, int flags, mode_t mode);
3491 * I.e. that will collect just the first string argument, then we
3492 * can reuse it for the 'creat' syscall, that has this signature:
3494 * int creat(const char *pathname, mode_t mode);
3498 * int stat(const char *pathname, struct stat *statbuf);
3499 * int lstat(const char *pathname, struct stat *statbuf);
3501 * Because the 'open' augmenter will collect the first arg as a string,
3502 * and leave alone all the other args, which already helps with
3503 * beautifying 'stat' and 'lstat''s pathname arg.
3505 * Then, in time, when 'stat' gets an augmenter that collects both
3506 * first and second arg (this one on the raw_syscalls:sys_exit prog
3507 * array tail call, then that one will be used.
3509 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3510 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3511 struct bpf_program *pair_prog;
3514 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3518 * For now we're just reusing the sys_enter prog, and if it
3519 * already has an augmenter, we don't need to find one.
3521 if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented)
3525 * Look at all the other syscalls for one that has a signature
3526 * that is close enough that we can share:
3528 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3529 if (pair_prog == NULL)
3532 sc->bpf_prog.sys_enter = pair_prog;
3535 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3536 * with the fd for the program we're reusing:
3538 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3539 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3546 #endif // HAVE_BPF_SKEL
3548 static int trace__set_ev_qualifier_filter(struct trace *trace)
3550 if (trace->syscalls.events.sys_enter)
3551 return trace__set_ev_qualifier_tp_filter(trace);
3555 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3556 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3559 #ifdef HAVE_LIBBPF_SUPPORT
3561 int map_fd = bpf_map__fd(map);
3564 for (i = 0; i < npids; ++i) {
3565 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3573 static int trace__set_filter_loop_pids(struct trace *trace)
3575 unsigned int nr = 1, err;
3579 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3581 while (thread && nr < ARRAY_SIZE(pids)) {
3582 struct thread *parent = machine__find_thread(trace->host,
3583 thread__ppid(thread),
3584 thread__ppid(thread));
3589 if (!strcmp(thread__comm_str(parent), "sshd") ||
3590 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3591 pids[nr++] = thread__tid(parent);
3597 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3598 if (!err && trace->filter_pids.map)
3599 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3604 static int trace__set_filter_pids(struct trace *trace)
3608 * Better not use !target__has_task() here because we need to cover the
3609 * case where no threads were specified in the command line, but a
3610 * workload was, and in that case we will fill in the thread_map when
3611 * we fork the workload in evlist__prepare_workload.
3613 if (trace->filter_pids.nr > 0) {
3614 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3615 trace->filter_pids.entries);
3616 if (!err && trace->filter_pids.map) {
3617 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3618 trace->filter_pids.entries);
3620 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3621 err = trace__set_filter_loop_pids(trace);
3627 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3629 struct evlist *evlist = trace->evlist;
3630 struct perf_sample sample;
3631 int err = evlist__parse_sample(evlist, event, &sample);
3634 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3636 trace__handle_event(trace, event, &sample);
3641 static int __trace__flush_events(struct trace *trace)
3643 u64 first = ordered_events__first_time(&trace->oe.data);
3644 u64 flush = trace->oe.last - NSEC_PER_SEC;
3646 /* Is there some thing to flush.. */
3647 if (first && first < flush)
3648 return ordered_events__flush_time(&trace->oe.data, flush);
3653 static int trace__flush_events(struct trace *trace)
3655 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3658 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3662 if (!trace->sort_events)
3663 return __trace__deliver_event(trace, event);
3665 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3666 if (err && err != -1)
3669 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL);
3673 return trace__flush_events(trace);
3676 static int ordered_events__deliver_event(struct ordered_events *oe,
3677 struct ordered_event *event)
3679 struct trace *trace = container_of(oe, struct trace, oe.data);
3681 return __trace__deliver_event(trace, event->event);
3684 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3686 struct tep_format_field *field;
3687 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3689 if (evsel->tp_format == NULL || fmt == NULL)
3692 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3693 if (strcmp(field->name, arg) == 0)
3699 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3701 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3703 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3704 char *right = tok + 1, *right_end;
3709 while (isspace(*right))
3715 while (!isalpha(*left))
3716 if (++left == tok) {
3718 * Bail out, can't find the name of the argument that is being
3719 * used in the filter, let it try to set this filter, will fail later.
3724 right_end = right + 1;
3725 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3728 if (isalpha(*right)) {
3729 struct syscall_arg_fmt *fmt;
3730 int left_size = tok - left,
3731 right_size = right_end - right;
3734 while (isspace(left[left_size - 1]))
3737 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3739 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3741 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3742 arg, evsel->name, evsel->filter);
3746 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3747 arg, (int)(right - tok), tok, right_size, right);
3751 struct syscall_arg syscall_arg = {
3755 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3756 char *n, expansion[19];
3757 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3758 int expansion_offset = right - new_filter;
3760 pr_debug("%s", expansion);
3762 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3763 pr_debug(" out of memory!\n");
3767 if (new_filter != evsel->filter)
3769 left = n + expansion_offset + expansion_lenght;
3772 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3773 right_size, right, arg, evsel->name, evsel->filter);
3777 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3778 arg, evsel->name, evsel->filter);
3788 if (new_filter != evsel->filter) {
3789 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3790 evsel__set_filter(evsel, new_filter);
3797 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3799 struct evlist *evlist = trace->evlist;
3800 struct evsel *evsel;
3802 evlist__for_each_entry(evlist, evsel) {
3803 if (evsel->filter == NULL)
3806 if (trace__expand_filter(trace, evsel)) {
3815 static int trace__run(struct trace *trace, int argc, const char **argv)
3817 struct evlist *evlist = trace->evlist;
3818 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3820 unsigned long before;
3821 const bool forks = argc > 0;
3822 bool draining = false;
3826 if (!trace->raw_augmented_syscalls) {
3827 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3828 goto out_error_raw_syscalls;
3830 if (trace->trace_syscalls)
3831 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3834 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3835 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3836 if (pgfault_maj == NULL)
3838 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3839 evlist__add(evlist, pgfault_maj);
3842 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3843 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3844 if (pgfault_min == NULL)
3846 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3847 evlist__add(evlist, pgfault_min);
3850 /* Enable ignoring missing threads when -u/-p option is defined. */
3851 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid;
3854 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3855 goto out_error_sched_stat_runtime;
3857 * If a global cgroup was set, apply it to all the events without an
3858 * explicit cgroup. I.e.:
3860 * trace -G A -e sched:*switch
3862 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3863 * _and_ sched:sched_switch to the 'A' cgroup, while:
3865 * trace -e sched:*switch -G A
3867 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3868 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3869 * a cgroup (on the root cgroup, sys wide, etc).
3873 * trace -G A -e sched:*switch -G B
3875 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3876 * to the 'B' cgroup.
3878 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3879 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3882 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3884 err = evlist__create_maps(evlist, &trace->opts.target);
3886 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3887 goto out_delete_evlist;
3890 err = trace__symbols_init(trace, evlist);
3892 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3893 goto out_delete_evlist;
3896 evlist__config(evlist, &trace->opts, &callchain_param);
3899 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
3901 fprintf(trace->output, "Couldn't run the workload!\n");
3902 goto out_delete_evlist;
3904 workload_pid = evlist->workload.pid;
3907 err = evlist__open(evlist);
3909 goto out_error_open;
3910 #ifdef HAVE_BPF_SKEL
3911 if (trace->syscalls.events.bpf_output) {
3912 struct perf_cpu cpu;
3915 * Set up the __augmented_syscalls__ BPF map to hold for each
3916 * CPU the bpf-output event's file descriptor.
3918 perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) {
3919 bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__,
3920 &cpu.cpu, sizeof(int),
3921 xyarray__entry(trace->syscalls.events.bpf_output->core.fd,
3923 sizeof(__u32), BPF_ANY);
3927 err = trace__set_filter_pids(trace);
3931 #ifdef HAVE_BPF_SKEL
3932 if (trace->skel && trace->skel->progs.sys_enter)
3933 trace__init_syscalls_bpf_prog_array_maps(trace);
3936 if (trace->ev_qualifier_ids.nr > 0) {
3937 err = trace__set_ev_qualifier_filter(trace);
3941 if (trace->syscalls.events.sys_exit) {
3942 pr_debug("event qualifier tracepoint filter: %s\n",
3943 trace->syscalls.events.sys_exit->filter);
3948 * If the "close" syscall is not traced, then we will not have the
3949 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3950 * fd->pathname table and were ending up showing the last value set by
3951 * syscalls opening a pathname and associating it with a descriptor or
3952 * reading it from /proc/pid/fd/ in cases where that doesn't make
3955 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3958 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3960 err = trace__expand_filters(trace, &evsel);
3962 goto out_delete_evlist;
3963 err = evlist__apply_filters(evlist, &evsel);
3965 goto out_error_apply_filters;
3967 err = evlist__mmap(evlist, trace->opts.mmap_pages);
3969 goto out_error_mmap;
3971 if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay)
3972 evlist__enable(evlist);
3975 evlist__start_workload(evlist);
3977 if (trace->opts.target.initial_delay) {
3978 usleep(trace->opts.target.initial_delay * 1000);
3979 evlist__enable(evlist);
3982 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3983 perf_thread_map__nr(evlist->core.threads) > 1 ||
3984 evlist__first(evlist)->core.attr.inherit;
3987 * Now that we already used evsel->core.attr to ask the kernel to setup the
3988 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
3989 * trace__resolve_callchain(), allowing per-event max-stack settings
3990 * to override an explicitly set --max-stack global setting.
3992 evlist__for_each_entry(evlist, evsel) {
3993 if (evsel__has_callchain(evsel) &&
3994 evsel->core.attr.sample_max_stack == 0)
3995 evsel->core.attr.sample_max_stack = trace->max_stack;
3998 before = trace->nr_events;
4000 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4001 union perf_event *event;
4004 md = &evlist->mmap[i];
4005 if (perf_mmap__read_init(&md->core) < 0)
4008 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4011 err = trace__deliver_event(trace, event);
4015 perf_mmap__consume(&md->core);
4020 if (done && !draining) {
4021 evlist__disable(evlist);
4025 perf_mmap__read_done(&md->core);
4028 if (trace->nr_events == before) {
4029 int timeout = done ? 100 : -1;
4031 if (!draining && evlist__poll(evlist, timeout) > 0) {
4032 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4037 if (trace__flush_events(trace))
4045 thread__zput(trace->current);
4047 evlist__disable(evlist);
4049 if (trace->sort_events)
4050 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4054 trace__fprintf_thread_summary(trace, trace->output);
4056 if (trace->show_tool_stats) {
4057 fprintf(trace->output, "Stats:\n "
4058 " vfs_getname : %" PRIu64 "\n"
4059 " proc_getname: %" PRIu64 "\n",
4060 trace->stats.vfs_getname,
4061 trace->stats.proc_getname);
4066 trace__symbols__exit(trace);
4067 evlist__free_syscall_tp_fields(evlist);
4068 evlist__delete(evlist);
4069 cgroup__put(trace->cgroup);
4070 trace->evlist = NULL;
4071 trace->live = false;
4074 char errbuf[BUFSIZ];
4076 out_error_sched_stat_runtime:
4077 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4080 out_error_raw_syscalls:
4081 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4085 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4089 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4092 fprintf(trace->output, "%s\n", errbuf);
4093 goto out_delete_evlist;
4095 out_error_apply_filters:
4096 fprintf(trace->output,
4097 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4098 evsel->filter, evsel__name(evsel), errno,
4099 str_error_r(errno, errbuf, sizeof(errbuf)));
4100 goto out_delete_evlist;
4103 fprintf(trace->output, "Not enough memory to run!\n");
4104 goto out_delete_evlist;
4107 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4108 goto out_delete_evlist;
4111 static int trace__replay(struct trace *trace)
4113 const struct evsel_str_handler handlers[] = {
4114 { "probe:vfs_getname", trace__vfs_getname, },
4116 struct perf_data data = {
4118 .mode = PERF_DATA_MODE_READ,
4119 .force = trace->force,
4121 struct perf_session *session;
4122 struct evsel *evsel;
4125 trace->tool.sample = trace__process_sample;
4126 trace->tool.mmap = perf_event__process_mmap;
4127 trace->tool.mmap2 = perf_event__process_mmap2;
4128 trace->tool.comm = perf_event__process_comm;
4129 trace->tool.exit = perf_event__process_exit;
4130 trace->tool.fork = perf_event__process_fork;
4131 trace->tool.attr = perf_event__process_attr;
4132 trace->tool.tracing_data = perf_event__process_tracing_data;
4133 trace->tool.build_id = perf_event__process_build_id;
4134 trace->tool.namespaces = perf_event__process_namespaces;
4136 trace->tool.ordered_events = true;
4137 trace->tool.ordering_requires_timestamps = true;
4139 /* add tid to output */
4140 trace->multiple_threads = true;
4142 session = perf_session__new(&data, &trace->tool);
4143 if (IS_ERR(session))
4144 return PTR_ERR(session);
4146 if (trace->opts.target.pid)
4147 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4149 if (trace->opts.target.tid)
4150 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4152 if (symbol__init(&session->header.env) < 0)
4155 trace->host = &session->machines.host;
4157 err = perf_session__set_tracepoints_handlers(session, handlers);
4161 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter");
4162 trace->syscalls.events.sys_enter = evsel;
4163 /* older kernels have syscalls tp versus raw_syscalls */
4165 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter");
4168 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4169 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4170 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4174 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit");
4175 trace->syscalls.events.sys_exit = evsel;
4177 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit");
4179 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4180 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4181 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4185 evlist__for_each_entry(session->evlist, evsel) {
4186 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4187 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4188 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4189 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4190 evsel->handler = trace__pgfault;
4195 err = perf_session__process_events(session);
4197 pr_err("Failed to process events, error %d", err);
4199 else if (trace->summary)
4200 trace__fprintf_thread_summary(trace, trace->output);
4203 perf_session__delete(session);
4208 static size_t trace__fprintf_threads_header(FILE *fp)
4212 printed = fprintf(fp, "\n Summary of events:\n\n");
4217 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4218 struct syscall_stats *stats;
4223 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4224 struct syscall_stats *stats = source->priv;
4226 entry->syscall = source->i;
4227 entry->stats = stats;
4228 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4231 static size_t thread__dump_stats(struct thread_trace *ttrace,
4232 struct trace *trace, FILE *fp)
4237 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4239 if (syscall_stats == NULL)
4242 printed += fprintf(fp, "\n");
4244 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4245 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4246 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4248 resort_rb__for_each_entry(nd, syscall_stats) {
4249 struct syscall_stats *stats = syscall_stats_entry->stats;
4251 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4252 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4253 double avg = avg_stats(&stats->stats);
4255 u64 n = (u64)stats->stats.n;
4257 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4258 avg /= NSEC_PER_MSEC;
4260 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4261 printed += fprintf(fp, " %-15s", sc->name);
4262 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4263 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4264 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4266 if (trace->errno_summary && stats->nr_failures) {
4269 for (e = 0; e < stats->max_errno; ++e) {
4270 if (stats->errnos[e] != 0)
4271 fprintf(fp, "\t\t\t\t%s: %d\n", perf_env__arch_strerrno(trace->host->env, e + 1), stats->errnos[e]);
4277 resort_rb__delete(syscall_stats);
4278 printed += fprintf(fp, "\n\n");
4283 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4286 struct thread_trace *ttrace = thread__priv(thread);
4292 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4294 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread));
4295 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4296 printed += fprintf(fp, "%.1f%%", ratio);
4298 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4300 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4302 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4303 else if (fputc('\n', fp) != EOF)
4306 printed += thread__dump_stats(ttrace, trace, fp);
4311 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4313 return ttrace ? ttrace->nr_events : 0;
4316 static int trace_nr_events_cmp(void *priv __maybe_unused,
4317 const struct list_head *la,
4318 const struct list_head *lb)
4320 struct thread_list *a = list_entry(la, struct thread_list, list);
4321 struct thread_list *b = list_entry(lb, struct thread_list, list);
4322 unsigned long a_nr_events = thread__nr_events(thread__priv(a->thread));
4323 unsigned long b_nr_events = thread__nr_events(thread__priv(b->thread));
4325 if (a_nr_events != b_nr_events)
4326 return a_nr_events < b_nr_events ? -1 : 1;
4328 /* Identical number of threads, place smaller tids first. */
4329 return thread__tid(a->thread) < thread__tid(b->thread)
4331 : (thread__tid(a->thread) > thread__tid(b->thread) ? 1 : 0);
4334 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4336 size_t printed = trace__fprintf_threads_header(fp);
4339 if (machine__thread_list(trace->host, &threads) == 0) {
4340 struct thread_list *pos;
4342 list_sort(NULL, &threads, trace_nr_events_cmp);
4344 list_for_each_entry(pos, &threads, list)
4345 printed += trace__fprintf_thread(fp, pos->thread, trace);
4347 thread_list__delete(&threads);
4351 static int trace__set_duration(const struct option *opt, const char *str,
4352 int unset __maybe_unused)
4354 struct trace *trace = opt->value;
4356 trace->duration_filter = atof(str);
4360 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4361 int unset __maybe_unused)
4365 struct trace *trace = opt->value;
4367 * FIXME: introduce a intarray class, plain parse csv and create a
4368 * { int nr, int entries[] } struct...
4370 struct intlist *list = intlist__new(str);
4375 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4376 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4378 if (trace->filter_pids.entries == NULL)
4381 trace->filter_pids.entries[0] = getpid();
4383 for (i = 1; i < trace->filter_pids.nr; ++i)
4384 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4386 intlist__delete(list);
4392 static int trace__open_output(struct trace *trace, const char *filename)
4396 if (!stat(filename, &st) && st.st_size) {
4397 char oldname[PATH_MAX];
4399 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4401 rename(filename, oldname);
4404 trace->output = fopen(filename, "w");
4406 return trace->output == NULL ? -errno : 0;
4409 static int parse_pagefaults(const struct option *opt, const char *str,
4410 int unset __maybe_unused)
4412 int *trace_pgfaults = opt->value;
4414 if (strcmp(str, "all") == 0)
4415 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4416 else if (strcmp(str, "maj") == 0)
4417 *trace_pgfaults |= TRACE_PFMAJ;
4418 else if (strcmp(str, "min") == 0)
4419 *trace_pgfaults |= TRACE_PFMIN;
4426 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4428 struct evsel *evsel;
4430 evlist__for_each_entry(evlist, evsel) {
4431 if (evsel->handler == NULL)
4432 evsel->handler = handler;
4436 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4438 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4441 const struct syscall_fmt *scfmt = syscall_fmt__find(name);
4446 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4447 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4450 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4455 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4457 struct evsel *evsel;
4459 evlist__for_each_entry(evlist, evsel) {
4460 if (evsel->priv || !evsel->tp_format)
4463 if (strcmp(evsel->tp_format->system, "syscalls")) {
4464 evsel__init_tp_arg_scnprintf(evsel);
4468 if (evsel__init_syscall_tp(evsel))
4471 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4472 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4474 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4477 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4478 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4479 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4481 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4484 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4492 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4493 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4494 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4496 * It'd be better to introduce a parse_options() variant that would return a
4497 * list with the terms it didn't match to an event...
4499 static int trace__parse_events_option(const struct option *opt, const char *str,
4500 int unset __maybe_unused)
4502 struct trace *trace = (struct trace *)opt->value;
4503 const char *s = str;
4504 char *sep = NULL, *lists[2] = { NULL, NULL, };
4505 int len = strlen(str) + 1, err = -1, list, idx;
4506 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4507 char group_name[PATH_MAX];
4508 const struct syscall_fmt *fmt;
4510 if (strace_groups_dir == NULL)
4515 trace->not_ev_qualifier = true;
4519 if ((sep = strchr(s, ',')) != NULL)
4523 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4524 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4529 fmt = syscall_fmt__find_by_alias(s);
4534 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4535 if (access(group_name, R_OK) == 0)
4540 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4542 lists[list] = malloc(len);
4543 if (lists[list] == NULL)
4545 strcpy(lists[list], s);
4555 if (lists[1] != NULL) {
4556 struct strlist_config slist_config = {
4557 .dirname = strace_groups_dir,
4560 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4561 if (trace->ev_qualifier == NULL) {
4562 fputs("Not enough memory to parse event qualifier", trace->output);
4566 if (trace__validate_ev_qualifier(trace))
4568 trace->trace_syscalls = true;
4574 struct parse_events_option_args parse_events_option_args = {
4575 .evlistp = &trace->evlist,
4578 .value = &parse_events_option_args,
4580 err = parse_events_option(&o, lists[0], 0);
4583 free(strace_groups_dir);
4592 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4594 struct trace *trace = opt->value;
4596 if (!list_empty(&trace->evlist->core.entries)) {
4598 .value = &trace->evlist,
4600 return parse_cgroups(&o, str, unset);
4602 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4607 static int trace__config(const char *var, const char *value, void *arg)
4609 struct trace *trace = arg;
4612 if (!strcmp(var, "trace.add_events")) {
4613 trace->perfconfig_events = strdup(value);
4614 if (trace->perfconfig_events == NULL) {
4615 pr_err("Not enough memory for %s\n", "trace.add_events");
4618 } else if (!strcmp(var, "trace.show_timestamp")) {
4619 trace->show_tstamp = perf_config_bool(var, value);
4620 } else if (!strcmp(var, "trace.show_duration")) {
4621 trace->show_duration = perf_config_bool(var, value);
4622 } else if (!strcmp(var, "trace.show_arg_names")) {
4623 trace->show_arg_names = perf_config_bool(var, value);
4624 if (!trace->show_arg_names)
4625 trace->show_zeros = true;
4626 } else if (!strcmp(var, "trace.show_zeros")) {
4627 bool new_show_zeros = perf_config_bool(var, value);
4628 if (!trace->show_arg_names && !new_show_zeros) {
4629 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4632 trace->show_zeros = new_show_zeros;
4633 } else if (!strcmp(var, "trace.show_prefix")) {
4634 trace->show_string_prefix = perf_config_bool(var, value);
4635 } else if (!strcmp(var, "trace.no_inherit")) {
4636 trace->opts.no_inherit = perf_config_bool(var, value);
4637 } else if (!strcmp(var, "trace.args_alignment")) {
4638 int args_alignment = 0;
4639 if (perf_config_int(&args_alignment, var, value) == 0)
4640 trace->args_alignment = args_alignment;
4641 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4642 if (strcasecmp(value, "libtraceevent") == 0)
4643 trace->libtraceevent_print = true;
4644 else if (strcasecmp(value, "libbeauty") == 0)
4645 trace->libtraceevent_print = false;
4651 static void trace__exit(struct trace *trace)
4655 strlist__delete(trace->ev_qualifier);
4656 zfree(&trace->ev_qualifier_ids.entries);
4657 if (trace->syscalls.table) {
4658 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
4659 syscall__exit(&trace->syscalls.table[i]);
4660 zfree(&trace->syscalls.table);
4662 syscalltbl__delete(trace->sctbl);
4663 zfree(&trace->perfconfig_events);
4666 #ifdef HAVE_BPF_SKEL
4667 static int bpf__setup_bpf_output(struct evlist *evlist)
4669 int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/");
4672 pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n");
4678 int cmd_trace(int argc, const char **argv)
4680 const char *trace_usage[] = {
4681 "perf trace [<options>] [<command>]",
4682 "perf trace [<options>] -- <command> [<options>]",
4683 "perf trace record [<options>] [<command>]",
4684 "perf trace record [<options>] -- <command> [<options>]",
4687 struct trace trace = {
4693 .user_freq = UINT_MAX,
4694 .user_interval = ULLONG_MAX,
4695 .no_buffering = true,
4696 .mmap_pages = UINT_MAX,
4700 .show_tstamp = true,
4701 .show_duration = true,
4702 .show_arg_names = true,
4703 .args_alignment = 70,
4704 .trace_syscalls = false,
4705 .kernel_syscallchains = false,
4706 .max_stack = UINT_MAX,
4707 .max_events = ULONG_MAX,
4709 const char *output_name = NULL;
4710 const struct option trace_options[] = {
4711 OPT_CALLBACK('e', "event", &trace, "event",
4712 "event/syscall selector. use 'perf list' to list available events",
4713 trace__parse_events_option),
4714 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4715 "event filter", parse_filter),
4716 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4717 "show the thread COMM next to its id"),
4718 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4719 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4720 trace__parse_events_option),
4721 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4722 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4723 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4724 "trace events on existing process id"),
4725 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4726 "trace events on existing thread id"),
4727 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4728 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4729 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4730 "system-wide collection from all CPUs"),
4731 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4732 "list of cpus to monitor"),
4733 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4734 "child tasks do not inherit counters"),
4735 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4736 "number of mmap data pages", evlist__parse_mmap_pages),
4737 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4739 OPT_CALLBACK(0, "duration", &trace, "float",
4740 "show only events with duration > N.M ms",
4741 trace__set_duration),
4742 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4743 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4744 OPT_BOOLEAN('T', "time", &trace.full_time,
4745 "Show full timestamp, not time relative to first start"),
4746 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4747 "Show only syscalls that failed"),
4748 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4749 "Show only syscall summary with statistics"),
4750 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4751 "Show all syscalls and summary with statistics"),
4752 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4753 "Show errno stats per syscall, use with -s or -S"),
4754 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4755 "Trace pagefaults", parse_pagefaults, "maj"),
4756 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4757 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4758 OPT_CALLBACK(0, "call-graph", &trace.opts,
4759 "record_mode[,record_size]", record_callchain_help,
4760 &record_parse_callchain_opt),
4761 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4762 "Use libtraceevent to print the tracepoint arguments."),
4763 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4764 "Show the kernel callchains on the syscall exit path"),
4765 OPT_ULONG(0, "max-events", &trace.max_events,
4766 "Set the maximum number of events to print, exit after that is reached. "),
4767 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4768 "Set the minimum stack depth when parsing the callchain, "
4769 "anything below the specified depth will be ignored."),
4770 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4771 "Set the maximum stack depth when parsing the callchain, "
4772 "anything beyond the specified depth will be ignored. "
4773 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4774 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4775 "Sort batch of events before processing, use if getting out of order events"),
4776 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4777 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4778 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4779 "per thread proc mmap processing timeout in ms"),
4780 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4781 trace__parse_cgroups),
4782 OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay,
4783 "ms to wait before starting measurement after program "
4785 OPTS_EVSWITCH(&trace.evswitch),
4788 bool __maybe_unused max_stack_user_set = true;
4789 bool mmap_pages_user_set = true;
4790 struct evsel *evsel;
4791 const char * const trace_subcommands[] = { "record", NULL };
4794 struct sigaction sigchld_act;
4796 signal(SIGSEGV, sighandler_dump_stack);
4797 signal(SIGFPE, sighandler_dump_stack);
4798 signal(SIGINT, sighandler_interrupt);
4800 memset(&sigchld_act, 0, sizeof(sigchld_act));
4801 sigchld_act.sa_flags = SA_SIGINFO;
4802 sigchld_act.sa_sigaction = sighandler_chld;
4803 sigaction(SIGCHLD, &sigchld_act, NULL);
4805 trace.evlist = evlist__new();
4806 trace.sctbl = syscalltbl__new();
4808 if (trace.evlist == NULL || trace.sctbl == NULL) {
4809 pr_err("Not enough memory to run!\n");
4815 * Parsing .perfconfig may entail creating a BPF event, that may need
4816 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4817 * is too small. This affects just this process, not touching the
4818 * global setting. If it fails we'll get something in 'perf trace -v'
4819 * to help diagnose the problem.
4821 rlimit__bump_memlock();
4823 err = perf_config(trace__config, &trace);
4827 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4828 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4831 * Here we already passed thru trace__parse_events_option() and it has
4832 * already figured out if -e syscall_name, if not but if --event
4833 * foo:bar was used, the user is interested _just_ in those, say,
4834 * tracepoint events, not in the strace-like syscall-name-based mode.
4836 * This is important because we need to check if strace-like mode is
4837 * needed to decided if we should filter out the eBPF
4838 * __augmented_syscalls__ code, if it is in the mix, say, via
4839 * .perfconfig trace.add_events, and filter those out.
4841 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4842 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4843 trace.trace_syscalls = true;
4846 * Now that we have --verbose figured out, lets see if we need to parse
4847 * events from .perfconfig, so that if those events fail parsing, say some
4848 * BPF program fails, then we'll be able to use --verbose to see what went
4849 * wrong in more detail.
4851 if (trace.perfconfig_events != NULL) {
4852 struct parse_events_error parse_err;
4854 parse_events_error__init(&parse_err);
4855 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4857 parse_events_error__print(&parse_err, trace.perfconfig_events);
4858 parse_events_error__exit(&parse_err);
4863 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4864 usage_with_options_msg(trace_usage, trace_options,
4865 "cgroup monitoring only available in system-wide mode");
4868 #ifdef HAVE_BPF_SKEL
4869 if (!trace.trace_syscalls)
4870 goto skip_augmentation;
4872 trace.skel = augmented_raw_syscalls_bpf__open();
4874 pr_debug("Failed to open augmented syscalls BPF skeleton");
4877 * Disable attaching the BPF programs except for sys_enter and
4878 * sys_exit that tail call into this as necessary.
4880 struct bpf_program *prog;
4882 bpf_object__for_each_program(prog, trace.skel->obj) {
4883 if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit)
4884 bpf_program__set_autoattach(prog, /*autoattach=*/false);
4887 err = augmented_raw_syscalls_bpf__load(trace.skel);
4890 libbpf_strerror(err, bf, sizeof(bf));
4891 pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf);
4893 augmented_raw_syscalls_bpf__attach(trace.skel);
4894 trace__add_syscall_newtp(&trace);
4898 err = bpf__setup_bpf_output(trace.evlist);
4900 libbpf_strerror(err, bf, sizeof(bf));
4901 pr_err("ERROR: Setup BPF output event failed: %s\n", bf);
4904 trace.syscalls.events.bpf_output = evlist__last(trace.evlist);
4905 assert(!strcmp(evsel__name(trace.syscalls.events.bpf_output), "__augmented_syscalls__"));
4910 if (trace.trace_pgfaults) {
4911 trace.opts.sample_address = true;
4912 trace.opts.sample_time = true;
4915 if (trace.opts.mmap_pages == UINT_MAX)
4916 mmap_pages_user_set = false;
4918 if (trace.max_stack == UINT_MAX) {
4919 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4920 max_stack_user_set = false;
4923 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4924 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4925 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4929 if (callchain_param.enabled) {
4930 if (!mmap_pages_user_set && geteuid() == 0)
4931 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4933 symbol_conf.use_callchain = true;
4936 if (trace.evlist->core.nr_entries > 0) {
4937 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
4938 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4939 perror("failed to set syscalls:* tracepoint fields");
4944 if (trace.sort_events) {
4945 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4946 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4950 * If we are augmenting syscalls, then combine what we put in the
4951 * __augmented_syscalls__ BPF map with what is in the
4952 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4953 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4955 * We'll switch to look at two BPF maps, one for sys_enter and the
4956 * other for sys_exit when we start augmenting the sys_exit paths with
4957 * buffers that are being copied from kernel to userspace, think 'read'
4960 if (trace.syscalls.events.bpf_output) {
4961 evlist__for_each_entry(trace.evlist, evsel) {
4962 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4964 if (raw_syscalls_sys_exit) {
4965 trace.raw_augmented_syscalls = true;
4966 goto init_augmented_syscall_tp;
4969 if (trace.syscalls.events.bpf_output->priv == NULL &&
4970 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
4971 struct evsel *augmented = trace.syscalls.events.bpf_output;
4972 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
4973 evsel__init_augmented_syscall_tp_args(augmented))
4976 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
4977 * Above we made sure we can get from the payload the tp fields
4978 * that we get from syscalls:sys_enter tracefs format file.
4980 augmented->handler = trace__sys_enter;
4982 * Now we do the same for the *syscalls:sys_enter event so that
4983 * if we handle it directly, i.e. if the BPF prog returns 0 so
4984 * as not to filter it, then we'll handle it just like we would
4985 * for the BPF_OUTPUT one:
4987 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
4988 evsel__init_augmented_syscall_tp_args(evsel))
4990 evsel->handler = trace__sys_enter;
4993 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
4994 struct syscall_tp *sc;
4995 init_augmented_syscall_tp:
4996 if (evsel__init_augmented_syscall_tp(evsel, evsel))
4998 sc = __evsel__syscall_tp(evsel);
5000 * For now with BPF raw_augmented we hook into
5001 * raw_syscalls:sys_enter and there we get all
5002 * 6 syscall args plus the tracepoint common
5003 * fields and the syscall_nr (another long).
5004 * So we check if that is the case and if so
5005 * don't look after the sc->args_size but
5006 * always after the full raw_syscalls:sys_enter
5007 * payload, which is fixed.
5009 * We'll revisit this later to pass
5010 * s->args_size to the BPF augmenter (now
5011 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5012 * so that it copies only what we need for each
5013 * syscall, like what happens when we use
5014 * syscalls:sys_enter_NAME, so that we reduce
5015 * the kernel/userspace traffic to just what is
5016 * needed for each syscall.
5018 if (trace.raw_augmented_syscalls)
5019 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5020 evsel__init_augmented_syscall_tp_ret(evsel);
5021 evsel->handler = trace__sys_exit;
5026 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5027 return trace__record(&trace, argc-1, &argv[1]);
5029 /* Using just --errno-summary will trigger --summary */
5030 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5031 trace.summary_only = true;
5033 /* summary_only implies summary option, but don't overwrite summary if set */
5034 if (trace.summary_only)
5035 trace.summary = trace.summary_only;
5037 if (output_name != NULL) {
5038 err = trace__open_output(&trace, output_name);
5040 perror("failed to create output file");
5045 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5049 err = target__validate(&trace.opts.target);
5051 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5052 fprintf(trace.output, "%s", bf);
5056 err = target__parse_uid(&trace.opts.target);
5058 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5059 fprintf(trace.output, "%s", bf);
5063 if (!argc && target__none(&trace.opts.target))
5064 trace.opts.target.system_wide = true;
5067 err = trace__replay(&trace);
5069 err = trace__run(&trace, argc, argv);
5072 if (output_name != NULL)
5073 fclose(trace.output);
5075 trace__exit(&trace);
5076 #ifdef HAVE_BPF_SKEL
5077 augmented_raw_syscalls_bpf__destroy(trace.skel);