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 <traceevent/event-parse.h>
19 #include <api/fs/tracing_path.h>
21 #include "util/bpf_map.h"
22 #include "util/rlimit.h"
24 #include "util/cgroup.h"
25 #include "util/color.h"
26 #include "util/config.h"
27 #include "util/debug.h"
30 #include "util/event.h"
31 #include "util/evsel.h"
32 #include "util/evsel_fprintf.h"
33 #include "util/synthetic-events.h"
34 #include "util/evlist.h"
35 #include "util/evswitch.h"
36 #include "util/mmap.h"
37 #include <subcmd/pager.h>
38 #include <subcmd/exec-cmd.h>
39 #include "util/machine.h"
41 #include "util/symbol.h"
42 #include "util/path.h"
43 #include "util/session.h"
44 #include "util/thread.h"
45 #include <subcmd/parse-options.h>
46 #include "util/strlist.h"
47 #include "util/intlist.h"
48 #include "util/thread_map.h"
49 #include "util/stat.h"
50 #include "util/tool.h"
51 #include "util/util.h"
52 #include "trace/beauty/beauty.h"
53 #include "trace-event.h"
54 #include "util/parse-events.h"
55 #include "util/bpf-loader.h"
56 #include "callchain.h"
57 #include "print_binary.h"
59 #include "syscalltbl.h"
60 #include "rb_resort.h"
69 #include <linux/err.h>
70 #include <linux/filter.h>
71 #include <linux/kernel.h>
72 #include <linux/random.h>
73 #include <linux/stringify.h>
74 #include <linux/time64.h>
75 #include <linux/zalloc.h>
77 #include <sys/sysmacros.h>
79 #include <linux/ctype.h>
80 #include <perf/mmap.h>
83 # define O_CLOEXEC 02000000
86 #ifndef F_LINUX_SPECIFIC_BASE
87 # define F_LINUX_SPECIFIC_BASE 1024
90 #define RAW_SYSCALL_ARGS_NUM 6
93 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
95 struct syscall_arg_fmt {
96 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
97 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
98 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
101 u16 nr_entries; // for arrays
109 const char *sys_enter,
112 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM];
120 struct perf_tool tool;
121 struct syscalltbl *sctbl;
123 struct syscall *table;
125 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
126 struct bpf_map *sys_enter,
130 struct evsel *sys_enter,
134 struct bpf_program *unaugmented_prog;
139 struct record_opts opts;
140 struct evlist *evlist;
141 struct machine *host;
142 struct thread *current;
143 struct bpf_object *bpf_obj;
144 struct cgroup *cgroup;
147 unsigned long nr_events;
148 unsigned long nr_events_printed;
149 unsigned long max_events;
150 struct evswitch evswitch;
151 struct strlist *ev_qualifier;
161 double duration_filter;
167 unsigned int max_stack;
168 unsigned int min_stack;
169 int raw_augmented_syscalls_args_size;
170 bool raw_augmented_syscalls;
171 bool fd_path_disabled;
173 bool not_ev_qualifier;
177 bool multiple_threads;
184 bool show_tool_stats;
186 bool libtraceevent_print;
187 bool kernel_syscallchains;
193 bool show_string_prefix;
197 char *perfconfig_events;
199 struct ordered_events data;
207 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
208 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
212 #define TP_UINT_FIELD(bits) \
213 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
216 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
225 #define TP_UINT_FIELD__SWAPPED(bits) \
226 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
229 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
230 return bswap_##bits(value);\
233 TP_UINT_FIELD__SWAPPED(16);
234 TP_UINT_FIELD__SWAPPED(32);
235 TP_UINT_FIELD__SWAPPED(64);
237 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
239 field->offset = offset;
243 field->integer = tp_field__u8;
246 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
249 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
252 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
261 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
263 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
266 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
268 return sample->raw_data + field->offset;
271 static int __tp_field__init_ptr(struct tp_field *field, int offset)
273 field->offset = offset;
274 field->pointer = tp_field__ptr;
278 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
280 return __tp_field__init_ptr(field, format_field->offset);
286 struct tp_field args, ret;
291 * The evsel->priv as used by 'perf trace'
292 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
293 * fmt: for all the other tracepoints
296 struct syscall_tp sc;
297 struct syscall_arg_fmt *fmt;
300 static struct evsel_trace *evsel_trace__new(void)
302 return zalloc(sizeof(struct evsel_trace));
305 static void evsel_trace__delete(struct evsel_trace *et)
315 * Used with raw_syscalls:sys_{enter,exit} and with the
316 * syscalls:sys_{enter,exit}_SYSCALL tracepoints
318 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
320 struct evsel_trace *et = evsel->priv;
325 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
327 if (evsel->priv == NULL) {
328 evsel->priv = evsel_trace__new();
329 if (evsel->priv == NULL)
333 return __evsel__syscall_tp(evsel);
337 * Used with all the other tracepoints.
339 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
341 struct evsel_trace *et = evsel->priv;
346 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
348 struct evsel_trace *et = evsel->priv;
350 if (evsel->priv == NULL) {
351 et = evsel->priv = evsel_trace__new();
357 if (et->fmt == NULL) {
358 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
363 return __evsel__syscall_arg_fmt(evsel);
366 evsel_trace__delete(evsel->priv);
371 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
373 struct tep_format_field *format_field = evsel__field(evsel, name);
375 if (format_field == NULL)
378 return tp_field__init_uint(field, format_field, evsel->needs_swap);
381 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
382 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
383 evsel__init_tp_uint_field(evsel, &sc->name, #name); })
385 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
387 struct tep_format_field *format_field = evsel__field(evsel, name);
389 if (format_field == NULL)
392 return tp_field__init_ptr(field, format_field);
395 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
396 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
397 evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
399 static void evsel__delete_priv(struct evsel *evsel)
402 evsel__delete(evsel);
405 static int evsel__init_syscall_tp(struct evsel *evsel)
407 struct syscall_tp *sc = evsel__syscall_tp(evsel);
410 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
411 evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
419 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
421 struct syscall_tp *sc = evsel__syscall_tp(evsel);
424 struct tep_format_field *syscall_id = evsel__field(tp, "id");
425 if (syscall_id == NULL)
426 syscall_id = evsel__field(tp, "__syscall_nr");
427 if (syscall_id == NULL ||
428 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
437 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
439 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
441 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
444 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
446 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
448 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
451 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
453 if (evsel__syscall_tp(evsel) != NULL) {
454 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
457 evsel->handler = handler;
464 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
466 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
468 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
470 evsel = evsel__newtp("syscalls", direction);
475 if (evsel__init_raw_syscall_tp(evsel, handler))
481 evsel__delete_priv(evsel);
485 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
486 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
487 fields->name.integer(&fields->name, sample); })
489 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
490 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
491 fields->name.pointer(&fields->name, sample); })
493 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
495 int idx = val - sa->offset;
497 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
498 size_t printed = scnprintf(bf, size, intfmt, val);
500 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
504 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
507 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
509 int idx = val - sa->offset;
511 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
512 size_t printed = scnprintf(bf, size, intfmt, val);
514 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
518 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
521 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
523 struct syscall_arg *arg)
525 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
528 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
529 struct syscall_arg *arg)
531 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
534 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
536 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
538 return strarray__strtoul(arg->parm, bf, size, ret);
541 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
543 return strarray__strtoul_flags(arg->parm, bf, size, ret);
546 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
548 return strarrays__strtoul(arg->parm, bf, size, ret);
551 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
553 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
556 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
561 for (i = 0; i < sas->nr_entries; ++i) {
562 struct strarray *sa = sas->entries[i];
563 int idx = val - sa->offset;
565 if (idx >= 0 && idx < sa->nr_entries) {
566 if (sa->entries[idx] == NULL)
568 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
572 printed = scnprintf(bf, size, intfmt, val);
574 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
578 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
582 for (i = 0; i < sa->nr_entries; ++i) {
583 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
584 *ret = sa->offset + i;
592 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
595 char *tok = bf, *sep, *end;
602 sep = memchr(tok, '|', size);
604 size -= sep - tok + 1;
607 while (end > tok && isspace(*end))
610 toklen = end - tok + 1;
613 while (isspace(*tok))
616 if (isalpha(*tok) || *tok == '_') {
617 if (!strarray__strtoul(sa, tok, toklen, &val))
620 bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X');
622 val = strtoul(tok, NULL, is_hexa ? 16 : 0);
625 *ret |= (1 << (val - 1));
635 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
639 for (i = 0; i < sas->nr_entries; ++i) {
640 struct strarray *sa = sas->entries[i];
642 if (strarray__strtoul(sa, bf, size, ret))
649 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
650 struct syscall_arg *arg)
652 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
656 #define AT_FDCWD -100
659 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
660 struct syscall_arg *arg)
663 const char *prefix = "AT_FD";
666 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
668 return syscall_arg__scnprintf_fd(bf, size, arg);
671 #define SCA_FDAT syscall_arg__scnprintf_fd_at
673 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
674 struct syscall_arg *arg);
676 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
678 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
680 return scnprintf(bf, size, "%#lx", arg->val);
683 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
686 return scnprintf(bf, size, "NULL");
687 return syscall_arg__scnprintf_hex(bf, size, arg);
690 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
692 return scnprintf(bf, size, "%d", arg->val);
695 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
697 return scnprintf(bf, size, "%ld", arg->val);
700 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
702 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
703 // fill missing comms using thread__set_comm()...
704 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
705 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
708 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
710 static const char *bpf_cmd[] = {
711 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
712 "MAP_GET_NEXT_KEY", "PROG_LOAD",
714 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
716 static const char *fsmount_flags[] = {
719 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
721 #include "trace/beauty/generated/fsconfig_arrays.c"
723 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
725 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
726 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
728 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
729 static DEFINE_STRARRAY(itimers, "ITIMER_");
731 static const char *keyctl_options[] = {
732 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
733 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
734 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
735 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
736 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
738 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
740 static const char *whences[] = { "SET", "CUR", "END",
748 static DEFINE_STRARRAY(whences, "SEEK_");
750 static const char *fcntl_cmds[] = {
751 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
752 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
753 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
756 static DEFINE_STRARRAY(fcntl_cmds, "F_");
758 static const char *fcntl_linux_specific_cmds[] = {
759 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
760 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
761 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
764 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
766 static struct strarray *fcntl_cmds_arrays[] = {
767 &strarray__fcntl_cmds,
768 &strarray__fcntl_linux_specific_cmds,
771 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
773 static const char *rlimit_resources[] = {
774 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
775 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
778 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
780 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
781 static DEFINE_STRARRAY(sighow, "SIG_");
783 static const char *clockid[] = {
784 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
785 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
786 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
788 static DEFINE_STRARRAY(clockid, "CLOCK_");
790 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
791 struct syscall_arg *arg)
793 bool show_prefix = arg->show_string_prefix;
794 const char *suffix = "_OK";
798 if (mode == F_OK) /* 0 */
799 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
801 if (mode & n##_OK) { \
802 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
812 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
817 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
819 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
820 struct syscall_arg *arg);
822 #define SCA_FILENAME syscall_arg__scnprintf_filename
824 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
825 struct syscall_arg *arg)
827 bool show_prefix = arg->show_string_prefix;
828 const char *prefix = "O_";
829 int printed = 0, flags = arg->val;
832 if (flags & O_##n) { \
833 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
842 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
847 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
849 #ifndef GRND_NONBLOCK
850 #define GRND_NONBLOCK 0x0001
853 #define GRND_RANDOM 0x0002
856 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
857 struct syscall_arg *arg)
859 bool show_prefix = arg->show_string_prefix;
860 const char *prefix = "GRND_";
861 int printed = 0, flags = arg->val;
864 if (flags & GRND_##n) { \
865 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
866 flags &= ~GRND_##n; \
874 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
879 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
881 #define STRARRAY(name, array) \
882 { .scnprintf = SCA_STRARRAY, \
883 .strtoul = STUL_STRARRAY, \
884 .parm = &strarray__##array, }
886 #define STRARRAY_FLAGS(name, array) \
887 { .scnprintf = SCA_STRARRAY_FLAGS, \
888 .strtoul = STUL_STRARRAY_FLAGS, \
889 .parm = &strarray__##array, }
891 #include "trace/beauty/arch_errno_names.c"
892 #include "trace/beauty/eventfd.c"
893 #include "trace/beauty/futex_op.c"
894 #include "trace/beauty/futex_val3.c"
895 #include "trace/beauty/mmap.c"
896 #include "trace/beauty/mode_t.c"
897 #include "trace/beauty/msg_flags.c"
898 #include "trace/beauty/open_flags.c"
899 #include "trace/beauty/perf_event_open.c"
900 #include "trace/beauty/pid.c"
901 #include "trace/beauty/sched_policy.c"
902 #include "trace/beauty/seccomp.c"
903 #include "trace/beauty/signum.c"
904 #include "trace/beauty/socket_type.c"
905 #include "trace/beauty/waitid_options.c"
907 static struct syscall_fmt syscall_fmts[] = {
909 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
910 { .name = "arch_prctl",
911 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
912 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
914 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
915 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
916 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
918 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
919 { .name = "brk", .hexret = true,
920 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
921 { .name = "clock_gettime",
922 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
923 { .name = "clone", .errpid = true, .nr_args = 5,
924 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
925 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
926 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
927 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
928 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
930 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
932 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
933 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
934 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
935 { .name = "epoll_ctl",
936 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
937 { .name = "eventfd2",
938 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
939 { .name = "fchmodat",
940 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
941 { .name = "fchownat",
942 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
944 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
945 .strtoul = STUL_STRARRAYS,
946 .parm = &strarrays__fcntl_cmds_arrays,
947 .show_zero = true, },
948 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
950 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
951 { .name = "fsconfig",
952 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
954 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
955 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
957 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
958 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
959 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
960 { .name = "fstat", .alias = "newfstat", },
961 { .name = "fstatat", .alias = "newfstatat", },
963 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
964 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
965 { .name = "futimesat",
966 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
967 { .name = "getitimer",
968 .arg = { [0] = STRARRAY(which, itimers), }, },
969 { .name = "getpid", .errpid = true, },
970 { .name = "getpgid", .errpid = true, },
971 { .name = "getppid", .errpid = true, },
972 { .name = "getrandom",
973 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
974 { .name = "getrlimit",
975 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
976 { .name = "gettid", .errpid = true, },
979 #if defined(__i386__) || defined(__x86_64__)
981 * FIXME: Make this available to all arches.
983 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
984 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
986 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
988 { .name = "kcmp", .nr_args = 5,
989 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
990 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
991 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
992 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
993 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
995 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
997 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
999 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1001 .arg = { [2] = STRARRAY(whence, whences), }, },
1002 { .name = "lstat", .alias = "newlstat", },
1003 { .name = "madvise",
1004 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1005 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1006 { .name = "mkdirat",
1007 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1008 { .name = "mknodat",
1009 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1010 { .name = "mmap", .hexret = true,
1011 /* The standard mmap maps to old_mmap on s390x */
1012 #if defined(__s390x__)
1013 .alias = "old_mmap",
1015 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1016 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1017 .strtoul = STUL_STRARRAY_FLAGS,
1018 .parm = &strarray__mmap_flags, },
1019 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1021 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1022 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1023 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1024 { .name = "move_mount",
1025 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1026 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1027 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1028 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1029 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1030 { .name = "mprotect",
1031 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1032 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1033 { .name = "mq_unlink",
1034 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1035 { .name = "mremap", .hexret = true,
1036 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1037 { .name = "name_to_handle_at",
1038 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1039 { .name = "newfstatat",
1040 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1042 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1043 { .name = "open_by_handle_at",
1044 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1045 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1047 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1048 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1049 { .name = "perf_event_open",
1050 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
1051 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1052 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1054 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1055 { .name = "pkey_alloc",
1056 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1057 { .name = "pkey_free",
1058 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1059 { .name = "pkey_mprotect",
1060 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1061 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1062 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1063 { .name = "poll", .timeout = true, },
1064 { .name = "ppoll", .timeout = true, },
1066 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1067 .strtoul = STUL_STRARRAY,
1068 .parm = &strarray__prctl_options, },
1069 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1070 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1071 { .name = "pread", .alias = "pread64", },
1072 { .name = "preadv", .alias = "pread", },
1073 { .name = "prlimit64",
1074 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1075 { .name = "pwrite", .alias = "pwrite64", },
1076 { .name = "readlinkat",
1077 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1078 { .name = "recvfrom",
1079 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1080 { .name = "recvmmsg",
1081 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1082 { .name = "recvmsg",
1083 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1084 { .name = "renameat",
1085 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1086 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1087 { .name = "renameat2",
1088 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1089 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1090 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1091 { .name = "rt_sigaction",
1092 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1093 { .name = "rt_sigprocmask",
1094 .arg = { [0] = STRARRAY(how, sighow), }, },
1095 { .name = "rt_sigqueueinfo",
1096 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1097 { .name = "rt_tgsigqueueinfo",
1098 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1099 { .name = "sched_setscheduler",
1100 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1101 { .name = "seccomp",
1102 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1103 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1104 { .name = "select", .timeout = true, },
1105 { .name = "sendfile", .alias = "sendfile64", },
1106 { .name = "sendmmsg",
1107 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1108 { .name = "sendmsg",
1109 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1111 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1112 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1113 { .name = "set_tid_address", .errpid = true, },
1114 { .name = "setitimer",
1115 .arg = { [0] = STRARRAY(which, itimers), }, },
1116 { .name = "setrlimit",
1117 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1119 .arg = { [0] = STRARRAY(family, socket_families),
1120 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1121 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1122 { .name = "socketpair",
1123 .arg = { [0] = STRARRAY(family, socket_families),
1124 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1125 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1126 { .name = "stat", .alias = "newstat", },
1128 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1129 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1130 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1131 { .name = "swapoff",
1132 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1134 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1135 { .name = "symlinkat",
1136 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1137 { .name = "sync_file_range",
1138 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1140 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1142 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1143 { .name = "umount2", .alias = "umount",
1144 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1145 { .name = "uname", .alias = "newuname", },
1146 { .name = "unlinkat",
1147 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1148 { .name = "utimensat",
1149 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1150 { .name = "wait4", .errpid = true,
1151 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1152 { .name = "waitid", .errpid = true,
1153 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1156 static int syscall_fmt__cmp(const void *name, const void *fmtp)
1158 const struct syscall_fmt *fmt = fmtp;
1159 return strcmp(name, fmt->name);
1162 static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name)
1164 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1167 static struct syscall_fmt *syscall_fmt__find(const char *name)
1169 const int nmemb = ARRAY_SIZE(syscall_fmts);
1170 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1173 static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
1177 for (i = 0; i < nmemb; ++i) {
1178 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1185 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1187 const int nmemb = ARRAY_SIZE(syscall_fmts);
1188 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1192 * is_exit: is this "exit" or "exit_group"?
1193 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1194 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1195 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1198 struct tep_event *tp_format;
1202 struct bpf_program *sys_enter,
1208 struct tep_format_field *args;
1210 struct syscall_fmt *fmt;
1211 struct syscall_arg_fmt *arg_fmt;
1215 * Must match what is in the BPF program:
1217 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1219 struct bpf_map_syscall_entry {
1221 u16 string_args_len[RAW_SYSCALL_ARGS_NUM];
1225 * We need to have this 'calculated' boolean because in some cases we really
1226 * don't know what is the duration of a syscall, for instance, when we start
1227 * a session and some threads are waiting for a syscall to finish, say 'poll',
1228 * in which case all we can do is to print "( ? ) for duration and for the
1231 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1233 double duration = (double)t / NSEC_PER_MSEC;
1234 size_t printed = fprintf(fp, "(");
1237 printed += fprintf(fp, " ");
1238 else if (duration >= 1.0)
1239 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1240 else if (duration >= 0.01)
1241 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1243 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1244 return printed + fprintf(fp, "): ");
1248 * filename.ptr: The filename char pointer that will be vfs_getname'd
1249 * filename.entry_str_pos: Where to insert the string translated from
1250 * filename.ptr by the vfs_getname tracepoint/kprobe.
1251 * ret_scnprintf: syscall args may set this to a different syscall return
1252 * formatter, for instance, fcntl may return fds, file flags, etc.
1254 struct thread_trace {
1257 unsigned long nr_events;
1258 unsigned long pfmaj, pfmin;
1261 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1264 short int entry_str_pos;
1266 unsigned int namelen;
1274 struct intlist *syscall_stats;
1277 static struct thread_trace *thread_trace__new(void)
1279 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1282 ttrace->files.max = -1;
1283 ttrace->syscall_stats = intlist__new(NULL);
1289 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1291 struct thread_trace *ttrace;
1296 if (thread__priv(thread) == NULL)
1297 thread__set_priv(thread, thread_trace__new());
1299 if (thread__priv(thread) == NULL)
1302 ttrace = thread__priv(thread);
1303 ++ttrace->nr_events;
1307 color_fprintf(fp, PERF_COLOR_RED,
1308 "WARNING: not enough memory, dropping samples!\n");
1313 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1314 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1316 struct thread_trace *ttrace = thread__priv(arg->thread);
1318 ttrace->ret_scnprintf = ret_scnprintf;
1321 #define TRACE_PFMAJ (1 << 0)
1322 #define TRACE_PFMIN (1 << 1)
1324 static const size_t trace__entry_str_size = 2048;
1326 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1331 if (fd > ttrace->files.max) {
1332 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1337 if (ttrace->files.max != -1) {
1338 memset(nfiles + ttrace->files.max + 1, 0,
1339 (fd - ttrace->files.max) * sizeof(struct file));
1341 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1344 ttrace->files.table = nfiles;
1345 ttrace->files.max = fd;
1348 return ttrace->files.table + fd;
1351 struct file *thread__files_entry(struct thread *thread, int fd)
1353 return thread_trace__files_entry(thread__priv(thread), fd);
1356 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1358 struct thread_trace *ttrace = thread__priv(thread);
1359 struct file *file = thread_trace__files_entry(ttrace, fd);
1363 if (stat(pathname, &st) == 0)
1364 file->dev_maj = major(st.st_rdev);
1365 file->pathname = strdup(pathname);
1373 static int thread__read_fd_path(struct thread *thread, int fd)
1375 char linkname[PATH_MAX], pathname[PATH_MAX];
1379 if (thread->pid_ == thread->tid) {
1380 scnprintf(linkname, sizeof(linkname),
1381 "/proc/%d/fd/%d", thread->pid_, fd);
1383 scnprintf(linkname, sizeof(linkname),
1384 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1387 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1390 ret = readlink(linkname, pathname, sizeof(pathname));
1392 if (ret < 0 || ret > st.st_size)
1395 pathname[ret] = '\0';
1396 return trace__set_fd_pathname(thread, fd, pathname);
1399 static const char *thread__fd_path(struct thread *thread, int fd,
1400 struct trace *trace)
1402 struct thread_trace *ttrace = thread__priv(thread);
1404 if (ttrace == NULL || trace->fd_path_disabled)
1410 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1413 ++trace->stats.proc_getname;
1414 if (thread__read_fd_path(thread, fd))
1418 return ttrace->files.table[fd].pathname;
1421 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1424 size_t printed = scnprintf(bf, size, "%d", fd);
1425 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1428 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1433 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1435 size_t printed = scnprintf(bf, size, "%d", fd);
1436 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1439 const char *path = thread__fd_path(thread, fd, trace);
1442 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1444 thread__put(thread);
1450 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1451 struct syscall_arg *arg)
1454 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1455 struct thread_trace *ttrace = thread__priv(arg->thread);
1457 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1458 zfree(&ttrace->files.table[fd].pathname);
1463 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1466 struct thread_trace *ttrace = thread__priv(thread);
1468 ttrace->filename.ptr = ptr;
1469 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1472 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1474 struct augmented_arg *augmented_arg = arg->augmented.args;
1475 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1477 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1478 * we would have two strings, each prefixed by its size.
1480 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1482 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1483 arg->augmented.size -= consumed;
1488 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1489 struct syscall_arg *arg)
1491 unsigned long ptr = arg->val;
1493 if (arg->augmented.args)
1494 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1496 if (!arg->trace->vfs_getname)
1497 return scnprintf(bf, size, "%#x", ptr);
1499 thread__set_filename_pos(arg->thread, bf, ptr);
1503 static bool trace__filter_duration(struct trace *trace, double t)
1505 return t < (trace->duration_filter * NSEC_PER_MSEC);
1508 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1510 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1512 return fprintf(fp, "%10.3f ", ts);
1516 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1517 * using ttrace->entry_time for a thread that receives a sys_exit without
1518 * first having received a sys_enter ("poll" issued before tracing session
1519 * starts, lost sys_enter exit due to ring buffer overflow).
1521 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1524 return __trace__fprintf_tstamp(trace, tstamp, fp);
1526 return fprintf(fp, " ? ");
1529 static bool done = false;
1530 static bool interrupted = false;
1532 static void sig_handler(int sig)
1535 interrupted = sig == SIGINT;
1538 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1542 if (trace->multiple_threads) {
1543 if (trace->show_comm)
1544 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1545 printed += fprintf(fp, "%d ", thread->tid);
1551 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1552 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1556 if (trace->show_tstamp)
1557 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1558 if (trace->show_duration)
1559 printed += fprintf_duration(duration, duration_calculated, fp);
1560 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1563 static int trace__process_event(struct trace *trace, struct machine *machine,
1564 union perf_event *event, struct perf_sample *sample)
1568 switch (event->header.type) {
1569 case PERF_RECORD_LOST:
1570 color_fprintf(trace->output, PERF_COLOR_RED,
1571 "LOST %" PRIu64 " events!\n", event->lost.lost);
1572 ret = machine__process_lost_event(machine, event, sample);
1575 ret = machine__process_event(machine, event, sample);
1582 static int trace__tool_process(struct perf_tool *tool,
1583 union perf_event *event,
1584 struct perf_sample *sample,
1585 struct machine *machine)
1587 struct trace *trace = container_of(tool, struct trace, tool);
1588 return trace__process_event(trace, machine, event, sample);
1591 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1593 struct machine *machine = vmachine;
1595 if (machine->kptr_restrict_warned)
1598 if (symbol_conf.kptr_restrict) {
1599 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1600 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1601 "Kernel samples will not be resolved.\n");
1602 machine->kptr_restrict_warned = true;
1606 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1609 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1611 int err = symbol__init(NULL);
1616 trace->host = machine__new_host();
1617 if (trace->host == NULL)
1620 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1624 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1625 evlist->core.threads, trace__tool_process, false,
1634 static void trace__symbols__exit(struct trace *trace)
1636 machine__exit(trace->host);
1642 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1646 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0)
1647 nr_args = sc->fmt->nr_args;
1649 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1650 if (sc->arg_fmt == NULL)
1653 for (idx = 0; idx < nr_args; ++idx) {
1655 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1658 sc->nr_args = nr_args;
1662 static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1663 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1664 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1667 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1669 const struct syscall_arg_fmt *fmt = fmtp;
1670 return strcmp(name, fmt->name);
1673 static struct syscall_arg_fmt *
1674 __syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
1676 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1679 static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1681 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1682 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1685 static struct tep_format_field *
1686 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1688 struct tep_format_field *last_field = NULL;
1691 for (; field; field = field->next, ++arg) {
1697 len = strlen(field->name);
1699 if (strcmp(field->type, "const char *") == 0 &&
1700 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1701 strstr(field->name, "path") != NULL))
1702 arg->scnprintf = SCA_FILENAME;
1703 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1704 arg->scnprintf = SCA_PTR;
1705 else if (strcmp(field->type, "pid_t") == 0)
1706 arg->scnprintf = SCA_PID;
1707 else if (strcmp(field->type, "umode_t") == 0)
1708 arg->scnprintf = SCA_MODE_T;
1709 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1710 arg->scnprintf = SCA_CHAR_ARRAY;
1711 arg->nr_entries = field->arraylen;
1712 } else if ((strcmp(field->type, "int") == 0 ||
1713 strcmp(field->type, "unsigned int") == 0 ||
1714 strcmp(field->type, "long") == 0) &&
1715 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1717 * /sys/kernel/tracing/events/syscalls/sys_enter*
1718 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1723 arg->scnprintf = SCA_FD;
1725 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
1728 arg->scnprintf = fmt->scnprintf;
1729 arg->strtoul = fmt->strtoul;
1737 static int syscall__set_arg_fmts(struct syscall *sc)
1739 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1742 sc->args_size = last_field->offset + last_field->size;
1747 static int trace__read_syscall_info(struct trace *trace, int id)
1751 const char *name = syscalltbl__name(trace->sctbl, id);
1753 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
1754 if (trace->syscalls.table == NULL) {
1755 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1756 if (trace->syscalls.table == NULL)
1760 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
1761 // When using libaudit we don't know beforehand what is the max syscall id
1762 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1767 // Need to memset from offset 0 and +1 members if brand new
1768 if (trace->syscalls.table == NULL)
1769 memset(table, 0, (id + 1) * sizeof(*sc));
1771 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1773 trace->syscalls.table = table;
1774 trace->sctbl->syscalls.max_id = id;
1777 sc = trace->syscalls.table + id;
1778 if (sc->nonexistent)
1782 sc->nonexistent = true;
1787 sc->fmt = syscall_fmt__find(sc->name);
1789 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1790 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1792 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1793 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1794 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1798 * Fails to read trace point format via sysfs node, so the trace point
1799 * doesn't exist. Set the 'nonexistent' flag as true.
1801 if (IS_ERR(sc->tp_format)) {
1802 sc->nonexistent = true;
1803 return PTR_ERR(sc->tp_format);
1806 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ?
1807 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields))
1810 sc->args = sc->tp_format->format.fields;
1812 * We need to check and discard the first variable '__syscall_nr'
1813 * or 'nr' that mean the syscall number. It is needless here.
1814 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1816 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1817 sc->args = sc->args->next;
1821 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1822 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1824 return syscall__set_arg_fmts(sc);
1827 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1829 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1832 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1839 static int intcmp(const void *a, const void *b)
1841 const int *one = a, *another = b;
1843 return *one - *another;
1846 static int trace__validate_ev_qualifier(struct trace *trace)
1849 bool printed_invalid_prefix = false;
1850 struct str_node *pos;
1851 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1853 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1854 sizeof(trace->ev_qualifier_ids.entries[0]));
1856 if (trace->ev_qualifier_ids.entries == NULL) {
1857 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1863 strlist__for_each_entry(pos, trace->ev_qualifier) {
1864 const char *sc = pos->s;
1865 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1868 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1872 if (!printed_invalid_prefix) {
1873 pr_debug("Skipping unknown syscalls: ");
1874 printed_invalid_prefix = true;
1883 trace->ev_qualifier_ids.entries[nr_used++] = id;
1884 if (match_next == -1)
1888 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1891 if (nr_allocated == nr_used) {
1895 entries = realloc(trace->ev_qualifier_ids.entries,
1896 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1897 if (entries == NULL) {
1899 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1902 trace->ev_qualifier_ids.entries = entries;
1904 trace->ev_qualifier_ids.entries[nr_used++] = id;
1908 trace->ev_qualifier_ids.nr = nr_used;
1909 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1911 if (printed_invalid_prefix)
1915 zfree(&trace->ev_qualifier_ids.entries);
1916 trace->ev_qualifier_ids.nr = 0;
1920 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1922 bool in_ev_qualifier;
1924 if (trace->ev_qualifier_ids.nr == 0)
1927 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1928 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1930 if (in_ev_qualifier)
1931 return !trace->not_ev_qualifier;
1933 return trace->not_ev_qualifier;
1937 * args is to be interpreted as a series of longs but we need to handle
1938 * 8-byte unaligned accesses. args points to raw_data within the event
1939 * and raw_data is guaranteed to be 8-byte unaligned because it is
1940 * preceded by raw_size which is a u32. So we need to copy args to a temp
1941 * variable to read it. Most notably this avoids extended load instructions
1942 * on unaligned addresses
1944 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1947 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1949 memcpy(&val, p, sizeof(val));
1953 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1954 struct syscall_arg *arg)
1956 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1957 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1959 return scnprintf(bf, size, "arg%d: ", arg->idx);
1963 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1964 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1965 * in tools/perf/trace/beauty/mount_flags.c
1967 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1969 if (fmt && fmt->mask_val)
1970 return fmt->mask_val(arg, val);
1975 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1976 struct syscall_arg *arg, unsigned long val)
1978 if (fmt && fmt->scnprintf) {
1981 arg->parm = fmt->parm;
1982 return fmt->scnprintf(bf, size, arg);
1984 return scnprintf(bf, size, "%ld", val);
1987 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1988 unsigned char *args, void *augmented_args, int augmented_args_size,
1989 struct trace *trace, struct thread *thread)
1994 struct syscall_arg arg = {
1997 .size = augmented_args_size,
1998 .args = augmented_args,
2004 .show_string_prefix = trace->show_string_prefix,
2006 struct thread_trace *ttrace = thread__priv(thread);
2009 * Things like fcntl will set this in its 'cmd' formatter to pick the
2010 * right formatter for the return value (an fd? file flags?), which is
2011 * not needed for syscalls that always return a given type, say an fd.
2013 ttrace->ret_scnprintf = NULL;
2015 if (sc->args != NULL) {
2016 struct tep_format_field *field;
2018 for (field = sc->args; field;
2019 field = field->next, ++arg.idx, bit <<= 1) {
2023 arg.fmt = &sc->arg_fmt[arg.idx];
2024 val = syscall_arg__val(&arg, arg.idx);
2026 * Some syscall args need some mask, most don't and
2027 * return val untouched.
2029 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2032 * Suppress this argument if its value is zero and
2033 * and we don't have a string associated in an
2037 !trace->show_zeros &&
2039 (sc->arg_fmt[arg.idx].show_zero ||
2040 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2041 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2042 sc->arg_fmt[arg.idx].parm))
2045 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2047 if (trace->show_arg_names)
2048 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2050 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2051 bf + printed, size - printed, &arg, val);
2053 } else if (IS_ERR(sc->tp_format)) {
2055 * If we managed to read the tracepoint /format file, then we
2056 * may end up not having any args, like with gettid(), so only
2057 * print the raw args when we didn't manage to read it.
2059 while (arg.idx < sc->nr_args) {
2062 val = syscall_arg__val(&arg, arg.idx);
2064 printed += scnprintf(bf + printed, size - printed, ", ");
2065 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2066 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2076 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2077 union perf_event *event,
2078 struct perf_sample *sample);
2080 static struct syscall *trace__syscall_info(struct trace *trace,
2081 struct evsel *evsel, int id)
2088 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2089 * before that, leaving at a higher verbosity level till that is
2090 * explained. Reproduced with plain ftrace with:
2092 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2093 * grep "NR -1 " /t/trace_pipe
2095 * After generating some load on the machine.
2099 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2100 id, evsel__name(evsel), ++n);
2107 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
2108 if (id > trace->sctbl->syscalls.max_id) {
2110 if (id >= trace->sctbl->syscalls.max_id) {
2112 * With libaudit we don't know beforehand what is the max_id,
2113 * so we let trace__read_syscall_info() figure that out as we
2114 * go on reading syscalls.
2116 err = trace__read_syscall_info(trace, id);
2122 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2123 (err = trace__read_syscall_info(trace, id)) != 0)
2126 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
2129 return &trace->syscalls.table[id];
2133 char sbuf[STRERR_BUFSIZE];
2134 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2135 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2136 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2137 fputs(" information\n", trace->output);
2142 struct syscall_stats {
2149 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2150 int id, struct perf_sample *sample, long err, bool errno_summary)
2152 struct int_node *inode;
2153 struct syscall_stats *stats;
2156 inode = intlist__findnew(ttrace->syscall_stats, id);
2160 stats = inode->priv;
2161 if (stats == NULL) {
2162 stats = malloc(sizeof(*stats));
2166 stats->nr_failures = 0;
2167 stats->max_errno = 0;
2168 stats->errnos = NULL;
2169 init_stats(&stats->stats);
2170 inode->priv = stats;
2173 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2174 duration = sample->time - ttrace->entry_time;
2176 update_stats(&stats->stats, duration);
2179 ++stats->nr_failures;
2185 if (err > stats->max_errno) {
2186 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2189 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2191 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2192 thread__comm_str(thread), thread->pid_, thread->tid);
2196 stats->errnos = new_errnos;
2197 stats->max_errno = err;
2200 ++stats->errnos[err - 1];
2204 static int trace__printf_interrupted_entry(struct trace *trace)
2206 struct thread_trace *ttrace;
2210 if (trace->failure_only || trace->current == NULL)
2213 ttrace = thread__priv(trace->current);
2215 if (!ttrace->entry_pending)
2218 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2219 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2221 if (len < trace->args_alignment - 4)
2222 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2224 printed += fprintf(trace->output, " ...\n");
2226 ttrace->entry_pending = false;
2227 ++trace->nr_events_printed;
2232 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2233 struct perf_sample *sample, struct thread *thread)
2237 if (trace->print_sample) {
2238 double ts = (double)sample->time / NSEC_PER_MSEC;
2240 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2241 evsel__name(evsel), ts,
2242 thread__comm_str(thread),
2243 sample->pid, sample->tid, sample->cpu);
2249 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2251 void *augmented_args = NULL;
2253 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2254 * and there we get all 6 syscall args plus the tracepoint common fields
2255 * that gets calculated at the start and the syscall_nr (another long).
2256 * So we check if that is the case and if so don't look after the
2257 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2260 * We'll revisit this later to pass s->args_size to the BPF augmenter
2261 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2262 * copies only what we need for each syscall, like what happens when we
2263 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2264 * traffic to just what is needed for each syscall.
2266 int args_size = raw_augmented_args_size ?: sc->args_size;
2268 *augmented_args_size = sample->raw_size - args_size;
2269 if (*augmented_args_size > 0)
2270 augmented_args = sample->raw_data + args_size;
2272 return augmented_args;
2275 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2276 union perf_event *event __maybe_unused,
2277 struct perf_sample *sample)
2282 struct thread *thread;
2283 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2284 int augmented_args_size = 0;
2285 void *augmented_args = NULL;
2286 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2287 struct thread_trace *ttrace;
2292 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2293 ttrace = thread__trace(thread, trace->output);
2297 trace__fprintf_sample(trace, evsel, sample, thread);
2299 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2301 if (ttrace->entry_str == NULL) {
2302 ttrace->entry_str = malloc(trace__entry_str_size);
2303 if (!ttrace->entry_str)
2307 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2308 trace__printf_interrupted_entry(trace);
2310 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2311 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2312 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2313 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2314 * so when handling, say the openat syscall, we end up getting 6 args for the
2315 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2316 * thinking that the extra 2 u64 args are the augmented filename, so just check
2317 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2319 if (evsel != trace->syscalls.events.sys_enter)
2320 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2321 ttrace->entry_time = sample->time;
2322 msg = ttrace->entry_str;
2323 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2325 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2326 args, augmented_args, augmented_args_size, trace, thread);
2329 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2332 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2333 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2334 if (trace->args_alignment > printed)
2335 alignment = trace->args_alignment - printed;
2336 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2339 ttrace->entry_pending = true;
2340 /* See trace__vfs_getname & trace__sys_exit */
2341 ttrace->filename.pending_open = false;
2344 if (trace->current != thread) {
2345 thread__put(trace->current);
2346 trace->current = thread__get(thread);
2350 thread__put(thread);
2354 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2355 struct perf_sample *sample)
2357 struct thread_trace *ttrace;
2358 struct thread *thread;
2359 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2360 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2362 void *args, *augmented_args = NULL;
2363 int augmented_args_size;
2368 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2369 ttrace = thread__trace(thread, trace->output);
2371 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2372 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2377 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2378 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2379 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2380 fprintf(trace->output, "%s", msg);
2383 thread__put(thread);
2387 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2388 struct perf_sample *sample,
2389 struct callchain_cursor *cursor)
2391 struct addr_location al;
2392 int max_stack = evsel->core.attr.sample_max_stack ?
2393 evsel->core.attr.sample_max_stack :
2397 if (machine__resolve(trace->host, &al, sample) < 0)
2400 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2401 addr_location__put(&al);
2405 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2407 /* TODO: user-configurable print_opts */
2408 const unsigned int print_opts = EVSEL__PRINT_SYM |
2410 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2412 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2415 static const char *errno_to_name(struct evsel *evsel, int err)
2417 struct perf_env *env = evsel__env(evsel);
2418 const char *arch_name = perf_env__arch(env);
2420 return arch_syscalls__strerrno(arch_name, err);
2423 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2424 union perf_event *event __maybe_unused,
2425 struct perf_sample *sample)
2429 bool duration_calculated = false;
2430 struct thread *thread;
2431 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2432 int alignment = trace->args_alignment;
2433 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2434 struct thread_trace *ttrace;
2439 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2440 ttrace = thread__trace(thread, trace->output);
2444 trace__fprintf_sample(trace, evsel, sample, thread);
2446 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2449 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2451 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2452 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2453 ttrace->filename.pending_open = false;
2454 ++trace->stats.vfs_getname;
2457 if (ttrace->entry_time) {
2458 duration = sample->time - ttrace->entry_time;
2459 if (trace__filter_duration(trace, duration))
2461 duration_calculated = true;
2462 } else if (trace->duration_filter)
2465 if (sample->callchain) {
2466 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2467 if (callchain_ret == 0) {
2468 if (callchain_cursor.nr < trace->min_stack)
2474 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2477 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2479 if (ttrace->entry_pending) {
2480 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2482 printed += fprintf(trace->output, " ... [");
2483 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2485 printed += fprintf(trace->output, "]: %s()", sc->name);
2488 printed++; /* the closing ')' */
2490 if (alignment > printed)
2491 alignment -= printed;
2495 fprintf(trace->output, ")%*s= ", alignment, " ");
2497 if (sc->fmt == NULL) {
2501 fprintf(trace->output, "%ld", ret);
2502 } else if (ret < 0) {
2504 char bf[STRERR_BUFSIZE];
2505 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2506 *e = errno_to_name(evsel, -ret);
2508 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2510 } else if (ret == 0 && sc->fmt->timeout)
2511 fprintf(trace->output, "0 (Timeout)");
2512 else if (ttrace->ret_scnprintf) {
2514 struct syscall_arg arg = {
2519 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2520 ttrace->ret_scnprintf = NULL;
2521 fprintf(trace->output, "%s", bf);
2522 } else if (sc->fmt->hexret)
2523 fprintf(trace->output, "%#lx", ret);
2524 else if (sc->fmt->errpid) {
2525 struct thread *child = machine__find_thread(trace->host, ret, ret);
2527 if (child != NULL) {
2528 fprintf(trace->output, "%ld", ret);
2529 if (child->comm_set)
2530 fprintf(trace->output, " (%s)", thread__comm_str(child));
2536 fputc('\n', trace->output);
2539 * We only consider an 'event' for the sake of --max-events a non-filtered
2540 * sys_enter + sys_exit and other tracepoint events.
2542 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2545 if (callchain_ret > 0)
2546 trace__fprintf_callchain(trace, sample);
2547 else if (callchain_ret < 0)
2548 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2550 ttrace->entry_pending = false;
2553 thread__put(thread);
2557 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2558 union perf_event *event __maybe_unused,
2559 struct perf_sample *sample)
2561 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2562 struct thread_trace *ttrace;
2563 size_t filename_len, entry_str_len, to_move;
2564 ssize_t remaining_space;
2566 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2571 ttrace = thread__priv(thread);
2575 filename_len = strlen(filename);
2576 if (filename_len == 0)
2579 if (ttrace->filename.namelen < filename_len) {
2580 char *f = realloc(ttrace->filename.name, filename_len + 1);
2585 ttrace->filename.namelen = filename_len;
2586 ttrace->filename.name = f;
2589 strcpy(ttrace->filename.name, filename);
2590 ttrace->filename.pending_open = true;
2592 if (!ttrace->filename.ptr)
2595 entry_str_len = strlen(ttrace->entry_str);
2596 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2597 if (remaining_space <= 0)
2600 if (filename_len > (size_t)remaining_space) {
2601 filename += filename_len - remaining_space;
2602 filename_len = remaining_space;
2605 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2606 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2607 memmove(pos + filename_len, pos, to_move);
2608 memcpy(pos, filename, filename_len);
2610 ttrace->filename.ptr = 0;
2611 ttrace->filename.entry_str_pos = 0;
2613 thread__put(thread);
2618 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2619 union perf_event *event __maybe_unused,
2620 struct perf_sample *sample)
2622 u64 runtime = evsel__intval(evsel, sample, "runtime");
2623 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2624 struct thread *thread = machine__findnew_thread(trace->host,
2627 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2632 ttrace->runtime_ms += runtime_ms;
2633 trace->runtime_ms += runtime_ms;
2635 thread__put(thread);
2639 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2641 evsel__strval(evsel, sample, "comm"),
2642 (pid_t)evsel__intval(evsel, sample, "pid"),
2644 evsel__intval(evsel, sample, "vruntime"));
2648 static int bpf_output__printer(enum binary_printer_ops op,
2649 unsigned int val, void *extra __maybe_unused, FILE *fp)
2651 unsigned char ch = (unsigned char)val;
2654 case BINARY_PRINT_CHAR_DATA:
2655 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2656 case BINARY_PRINT_DATA_BEGIN:
2657 case BINARY_PRINT_LINE_BEGIN:
2658 case BINARY_PRINT_ADDR:
2659 case BINARY_PRINT_NUM_DATA:
2660 case BINARY_PRINT_NUM_PAD:
2661 case BINARY_PRINT_SEP:
2662 case BINARY_PRINT_CHAR_PAD:
2663 case BINARY_PRINT_LINE_END:
2664 case BINARY_PRINT_DATA_END:
2672 static void bpf_output__fprintf(struct trace *trace,
2673 struct perf_sample *sample)
2675 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2676 bpf_output__printer, NULL, trace->output);
2677 ++trace->nr_events_printed;
2680 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2681 struct thread *thread, void *augmented_args, int augmented_args_size)
2684 size_t size = sizeof(bf);
2685 struct tep_format_field *field = evsel->tp_format->format.fields;
2686 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2690 struct syscall_arg syscall_arg = {
2692 .size = augmented_args_size,
2693 .args = augmented_args,
2699 .show_string_prefix = trace->show_string_prefix,
2702 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2703 if (syscall_arg.mask & bit)
2706 syscall_arg.len = 0;
2707 syscall_arg.fmt = arg;
2708 if (field->flags & TEP_FIELD_IS_ARRAY) {
2709 int offset = field->offset;
2711 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2712 offset = format_field__intval(field, sample, evsel->needs_swap);
2713 syscall_arg.len = offset >> 16;
2717 val = (uintptr_t)(sample->raw_data + offset);
2719 val = format_field__intval(field, sample, evsel->needs_swap);
2721 * Some syscall args need some mask, most don't and
2722 * return val untouched.
2724 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2727 * Suppress this argument if its value is zero and
2728 * and we don't have a string associated in an
2732 !trace->show_zeros &&
2733 !((arg->show_zero ||
2734 arg->scnprintf == SCA_STRARRAY ||
2735 arg->scnprintf == SCA_STRARRAYS) &&
2739 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2742 * XXX Perhaps we should have a show_tp_arg_names,
2743 * leaving show_arg_names just for syscalls?
2745 if (1 || trace->show_arg_names)
2746 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2748 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2751 return printed + fprintf(trace->output, "%s", bf);
2754 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2755 union perf_event *event __maybe_unused,
2756 struct perf_sample *sample)
2758 struct thread *thread;
2759 int callchain_ret = 0;
2761 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2762 * this event's max_events having been hit and this is an entry coming
2763 * from the ring buffer that we should discard, since the max events
2764 * have already been considered/printed.
2766 if (evsel->disabled)
2769 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2771 if (sample->callchain) {
2772 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2773 if (callchain_ret == 0) {
2774 if (callchain_cursor.nr < trace->min_stack)
2780 trace__printf_interrupted_entry(trace);
2781 trace__fprintf_tstamp(trace, sample->time, trace->output);
2783 if (trace->trace_syscalls && trace->show_duration)
2784 fprintf(trace->output, "( ): ");
2787 trace__fprintf_comm_tid(trace, thread, trace->output);
2789 if (evsel == trace->syscalls.events.augmented) {
2790 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2791 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2794 fprintf(trace->output, "%s(", sc->name);
2795 trace__fprintf_sys_enter(trace, evsel, sample);
2796 fputc(')', trace->output);
2801 * XXX: Not having the associated syscall info or not finding/adding
2802 * the thread should never happen, but if it does...
2803 * fall thru and print it as a bpf_output event.
2807 fprintf(trace->output, "%s(", evsel->name);
2809 if (evsel__is_bpf_output(evsel)) {
2810 bpf_output__fprintf(trace, sample);
2811 } else if (evsel->tp_format) {
2812 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2813 trace__fprintf_sys_enter(trace, evsel, sample)) {
2814 if (trace->libtraceevent_print) {
2815 event_format__fprintf(evsel->tp_format, sample->cpu,
2816 sample->raw_data, sample->raw_size,
2819 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2825 fprintf(trace->output, ")\n");
2827 if (callchain_ret > 0)
2828 trace__fprintf_callchain(trace, sample);
2829 else if (callchain_ret < 0)
2830 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2832 ++trace->nr_events_printed;
2834 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2835 evsel__disable(evsel);
2836 evsel__close(evsel);
2839 thread__put(thread);
2843 static void print_location(FILE *f, struct perf_sample *sample,
2844 struct addr_location *al,
2845 bool print_dso, bool print_sym)
2848 if ((verbose > 0 || print_dso) && al->map)
2849 fprintf(f, "%s@", al->map->dso->long_name);
2851 if ((verbose > 0 || print_sym) && al->sym)
2852 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2853 al->addr - al->sym->start);
2855 fprintf(f, "0x%" PRIx64, al->addr);
2857 fprintf(f, "0x%" PRIx64, sample->addr);
2860 static int trace__pgfault(struct trace *trace,
2861 struct evsel *evsel,
2862 union perf_event *event __maybe_unused,
2863 struct perf_sample *sample)
2865 struct thread *thread;
2866 struct addr_location al;
2867 char map_type = 'd';
2868 struct thread_trace *ttrace;
2870 int callchain_ret = 0;
2872 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2874 if (sample->callchain) {
2875 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2876 if (callchain_ret == 0) {
2877 if (callchain_cursor.nr < trace->min_stack)
2883 ttrace = thread__trace(thread, trace->output);
2887 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2892 if (trace->summary_only)
2895 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2897 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2899 fprintf(trace->output, "%sfault [",
2900 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2903 print_location(trace->output, sample, &al, false, true);
2905 fprintf(trace->output, "] => ");
2907 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2910 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2918 print_location(trace->output, sample, &al, true, false);
2920 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2922 if (callchain_ret > 0)
2923 trace__fprintf_callchain(trace, sample);
2924 else if (callchain_ret < 0)
2925 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2927 ++trace->nr_events_printed;
2931 thread__put(thread);
2935 static void trace__set_base_time(struct trace *trace,
2936 struct evsel *evsel,
2937 struct perf_sample *sample)
2940 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2941 * and don't use sample->time unconditionally, we may end up having
2942 * some other event in the future without PERF_SAMPLE_TIME for good
2943 * reason, i.e. we may not be interested in its timestamps, just in
2944 * it taking place, picking some piece of information when it
2945 * appears in our event stream (vfs_getname comes to mind).
2947 if (trace->base_time == 0 && !trace->full_time &&
2948 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2949 trace->base_time = sample->time;
2952 static int trace__process_sample(struct perf_tool *tool,
2953 union perf_event *event,
2954 struct perf_sample *sample,
2955 struct evsel *evsel,
2956 struct machine *machine __maybe_unused)
2958 struct trace *trace = container_of(tool, struct trace, tool);
2959 struct thread *thread;
2962 tracepoint_handler handler = evsel->handler;
2964 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2965 if (thread && thread__is_filtered(thread))
2968 trace__set_base_time(trace, evsel, sample);
2972 handler(trace, evsel, event, sample);
2975 thread__put(thread);
2979 static int trace__record(struct trace *trace, int argc, const char **argv)
2981 unsigned int rec_argc, i, j;
2982 const char **rec_argv;
2983 const char * const record_args[] = {
2989 pid_t pid = getpid();
2990 char *filter = asprintf__tp_filter_pids(1, &pid);
2991 const char * const sc_args[] = { "-e", };
2992 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2993 const char * const majpf_args[] = { "-e", "major-faults" };
2994 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2995 const char * const minpf_args[] = { "-e", "minor-faults" };
2996 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2999 /* +3 is for the event string below and the pid filter */
3000 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3001 majpf_args_nr + minpf_args_nr + argc;
3002 rec_argv = calloc(rec_argc + 1, sizeof(char *));
3004 if (rec_argv == NULL || filter == NULL)
3008 for (i = 0; i < ARRAY_SIZE(record_args); i++)
3009 rec_argv[j++] = record_args[i];
3011 if (trace->trace_syscalls) {
3012 for (i = 0; i < sc_args_nr; i++)
3013 rec_argv[j++] = sc_args[i];
3015 /* event string may be different for older kernels - e.g., RHEL6 */
3016 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3017 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3018 else if (is_valid_tracepoint("syscalls:sys_enter"))
3019 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3021 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3026 rec_argv[j++] = "--filter";
3027 rec_argv[j++] = filter;
3029 if (trace->trace_pgfaults & TRACE_PFMAJ)
3030 for (i = 0; i < majpf_args_nr; i++)
3031 rec_argv[j++] = majpf_args[i];
3033 if (trace->trace_pgfaults & TRACE_PFMIN)
3034 for (i = 0; i < minpf_args_nr; i++)
3035 rec_argv[j++] = minpf_args[i];
3037 for (i = 0; i < (unsigned int)argc; i++)
3038 rec_argv[j++] = argv[i];
3040 err = cmd_record(j, rec_argv);
3047 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3049 static bool evlist__add_vfs_getname(struct evlist *evlist)
3052 struct evsel *evsel, *tmp;
3053 struct parse_events_error err;
3056 bzero(&err, sizeof(err));
3057 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3061 free(err.first_str);
3062 free(err.first_help);
3066 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3067 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3070 if (evsel__field(evsel, "pathname")) {
3071 evsel->handler = trace__vfs_getname;
3076 list_del_init(&evsel->core.node);
3077 evsel->evlist = NULL;
3078 evsel__delete(evsel);
3084 static struct evsel *evsel__new_pgfault(u64 config)
3086 struct evsel *evsel;
3087 struct perf_event_attr attr = {
3088 .type = PERF_TYPE_SOFTWARE,
3092 attr.config = config;
3093 attr.sample_period = 1;
3095 event_attr_init(&attr);
3097 evsel = evsel__new(&attr);
3099 evsel->handler = trace__pgfault;
3104 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3106 const u32 type = event->header.type;
3107 struct evsel *evsel;
3109 if (type != PERF_RECORD_SAMPLE) {
3110 trace__process_event(trace, trace->host, event, sample);
3114 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
3115 if (evsel == NULL) {
3116 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3120 if (evswitch__discard(&trace->evswitch, evsel))
3123 trace__set_base_time(trace, evsel, sample);
3125 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3126 sample->raw_data == NULL) {
3127 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3128 evsel__name(evsel), sample->tid,
3129 sample->cpu, sample->raw_size);
3131 tracepoint_handler handler = evsel->handler;
3132 handler(trace, evsel, event, sample);
3135 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3139 static int trace__add_syscall_newtp(struct trace *trace)
3142 struct evlist *evlist = trace->evlist;
3143 struct evsel *sys_enter, *sys_exit;
3145 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3146 if (sys_enter == NULL)
3149 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3150 goto out_delete_sys_enter;
3152 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3153 if (sys_exit == NULL)
3154 goto out_delete_sys_enter;
3156 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3157 goto out_delete_sys_exit;
3159 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3160 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3162 evlist__add(evlist, sys_enter);
3163 evlist__add(evlist, sys_exit);
3165 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3167 * We're interested only in the user space callchain
3168 * leading to the syscall, allow overriding that for
3169 * debugging reasons using --kernel_syscall_callchains
3171 sys_exit->core.attr.exclude_callchain_kernel = 1;
3174 trace->syscalls.events.sys_enter = sys_enter;
3175 trace->syscalls.events.sys_exit = sys_exit;
3181 out_delete_sys_exit:
3182 evsel__delete_priv(sys_exit);
3183 out_delete_sys_enter:
3184 evsel__delete_priv(sys_enter);
3188 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3191 struct evsel *sys_exit;
3192 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3193 trace->ev_qualifier_ids.nr,
3194 trace->ev_qualifier_ids.entries);
3199 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3200 sys_exit = trace->syscalls.events.sys_exit;
3201 err = evsel__append_tp_filter(sys_exit, filter);
3212 #ifdef HAVE_LIBBPF_SUPPORT
3213 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3215 if (trace->bpf_obj == NULL)
3218 return bpf_object__find_map_by_name(trace->bpf_obj, name);
3221 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3223 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
3226 static void trace__set_bpf_map_syscalls(struct trace *trace)
3228 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
3229 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
3230 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
3233 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3235 if (trace->bpf_obj == NULL)
3238 return bpf_object__find_program_by_title(trace->bpf_obj, name);
3241 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3242 const char *prog_name, const char *type)
3244 struct bpf_program *prog;
3246 if (prog_name == NULL) {
3247 char default_prog_name[256];
3248 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3249 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3252 if (sc->fmt && sc->fmt->alias) {
3253 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3254 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3258 goto out_unaugmented;
3261 prog = trace__find_bpf_program_by_title(trace, prog_name);
3268 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3269 prog_name, type, sc->name);
3271 return trace->syscalls.unaugmented_prog;
3274 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3276 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3281 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3282 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3285 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3287 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3288 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3291 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3293 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3294 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3297 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3299 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3305 for (; arg < sc->nr_args; ++arg) {
3306 entry->string_args_len[arg] = 0;
3307 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3308 /* Should be set like strace -s strsize */
3309 entry->string_args_len[arg] = PATH_MAX;
3313 for (; arg < 6; ++arg)
3314 entry->string_args_len[arg] = 0;
3316 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3318 int fd = bpf_map__fd(trace->syscalls.map);
3319 struct bpf_map_syscall_entry value = {
3320 .enabled = !trace->not_ev_qualifier,
3325 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3326 int key = trace->ev_qualifier_ids.entries[i];
3328 if (value.enabled) {
3329 trace__init_bpf_map_syscall_args(trace, key, &value);
3330 trace__init_syscall_bpf_progs(trace, key);
3333 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3341 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3343 int fd = bpf_map__fd(trace->syscalls.map);
3344 struct bpf_map_syscall_entry value = {
3349 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3351 trace__init_bpf_map_syscall_args(trace, key, &value);
3353 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3361 static int trace__init_syscalls_bpf_map(struct trace *trace)
3363 bool enabled = true;
3365 if (trace->ev_qualifier_ids.nr)
3366 enabled = trace->not_ev_qualifier;
3368 return __trace__init_syscalls_bpf_map(trace, enabled);
3371 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3373 struct tep_format_field *field, *candidate_field;
3377 * We're only interested in syscalls that have a pointer:
3379 for (field = sc->args; field; field = field->next) {
3380 if (field->flags & TEP_FIELD_IS_POINTER)
3381 goto try_to_find_pair;
3387 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3388 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3389 struct bpf_program *pair_prog;
3390 bool is_candidate = false;
3392 if (pair == NULL || pair == sc ||
3393 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3396 for (field = sc->args, candidate_field = pair->args;
3397 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3398 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3399 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3402 if (!candidate_is_pointer) {
3403 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3407 if (candidate_is_pointer) {
3408 // The candidate might copy a pointer we don't have, skip it.
3409 goto next_candidate;
3414 if (strcmp(field->type, candidate_field->type))
3415 goto next_candidate;
3417 is_candidate = true;
3421 goto next_candidate;
3424 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3425 * then it may be collecting that and we then can't use it, as it would collect
3426 * more than what is common to the two syscalls.
3428 if (candidate_field) {
3429 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3430 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3431 goto next_candidate;
3434 pair_prog = pair->bpf_prog.sys_enter;
3436 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3437 * have been searched for, so search it here and if it returns the
3438 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3439 * program for a filtered syscall on a non-filtered one.
3441 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3442 * useful for "renameat2".
3444 if (pair_prog == NULL) {
3445 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3446 if (pair_prog == trace->syscalls.unaugmented_prog)
3447 goto next_candidate;
3450 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3459 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3461 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3462 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3465 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3468 if (!trace__syscall_enabled(trace, key))
3471 trace__init_syscall_bpf_progs(trace, key);
3473 // It'll get at least the "!raw_syscalls:unaugmented"
3474 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3475 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3478 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3479 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3485 * Now lets do a second pass looking for enabled syscalls without
3486 * an augmenter that have a signature that is a superset of another
3487 * syscall with an augmenter so that we can auto-reuse it.
3489 * I.e. if we have an augmenter for the "open" syscall that has
3492 * int open(const char *pathname, int flags, mode_t mode);
3494 * I.e. that will collect just the first string argument, then we
3495 * can reuse it for the 'creat' syscall, that has this signature:
3497 * int creat(const char *pathname, mode_t mode);
3501 * int stat(const char *pathname, struct stat *statbuf);
3502 * int lstat(const char *pathname, struct stat *statbuf);
3504 * Because the 'open' augmenter will collect the first arg as a string,
3505 * and leave alone all the other args, which already helps with
3506 * beautifying 'stat' and 'lstat''s pathname arg.
3508 * Then, in time, when 'stat' gets an augmenter that collects both
3509 * first and second arg (this one on the raw_syscalls:sys_exit prog
3510 * array tail call, then that one will be used.
3512 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3513 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3514 struct bpf_program *pair_prog;
3517 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3521 * For now we're just reusing the sys_enter prog, and if it
3522 * already has an augmenter, we don't need to find one.
3524 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3528 * Look at all the other syscalls for one that has a signature
3529 * that is close enough that we can share:
3531 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3532 if (pair_prog == NULL)
3535 sc->bpf_prog.sys_enter = pair_prog;
3538 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3539 * with the fd for the program we're reusing:
3541 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3542 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3551 static void trace__delete_augmented_syscalls(struct trace *trace)
3553 struct evsel *evsel, *tmp;
3555 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3556 evsel__delete(trace->syscalls.events.augmented);
3557 trace->syscalls.events.augmented = NULL;
3559 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3560 if (evsel->bpf_obj == trace->bpf_obj) {
3561 evlist__remove(trace->evlist, evsel);
3562 evsel__delete(evsel);
3567 bpf_object__close(trace->bpf_obj);
3568 trace->bpf_obj = NULL;
3570 #else // HAVE_LIBBPF_SUPPORT
3571 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
3572 const char *name __maybe_unused)
3577 static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
3581 static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
3585 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3590 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3595 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3596 const char *name __maybe_unused)
3601 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3606 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3609 #endif // HAVE_LIBBPF_SUPPORT
3611 static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3613 struct evsel *evsel;
3615 evlist__for_each_entry(trace->evlist, evsel) {
3616 if (evsel == trace->syscalls.events.augmented ||
3617 evsel->bpf_obj == trace->bpf_obj)
3626 static int trace__set_ev_qualifier_filter(struct trace *trace)
3628 if (trace->syscalls.map)
3629 return trace__set_ev_qualifier_bpf_filter(trace);
3630 if (trace->syscalls.events.sys_enter)
3631 return trace__set_ev_qualifier_tp_filter(trace);
3635 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3636 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3639 #ifdef HAVE_LIBBPF_SUPPORT
3641 int map_fd = bpf_map__fd(map);
3644 for (i = 0; i < npids; ++i) {
3645 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3653 static int trace__set_filter_loop_pids(struct trace *trace)
3655 unsigned int nr = 1, err;
3659 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3661 while (thread && nr < ARRAY_SIZE(pids)) {
3662 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3667 if (!strcmp(thread__comm_str(parent), "sshd") ||
3668 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3669 pids[nr++] = parent->tid;
3675 err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3676 if (!err && trace->filter_pids.map)
3677 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3682 static int trace__set_filter_pids(struct trace *trace)
3686 * Better not use !target__has_task() here because we need to cover the
3687 * case where no threads were specified in the command line, but a
3688 * workload was, and in that case we will fill in the thread_map when
3689 * we fork the workload in perf_evlist__prepare_workload.
3691 if (trace->filter_pids.nr > 0) {
3692 err = perf_evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3693 trace->filter_pids.entries);
3694 if (!err && trace->filter_pids.map) {
3695 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3696 trace->filter_pids.entries);
3698 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3699 err = trace__set_filter_loop_pids(trace);
3705 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3707 struct evlist *evlist = trace->evlist;
3708 struct perf_sample sample;
3711 err = perf_evlist__parse_sample(evlist, event, &sample);
3713 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3715 trace__handle_event(trace, event, &sample);
3720 static int __trace__flush_events(struct trace *trace)
3722 u64 first = ordered_events__first_time(&trace->oe.data);
3723 u64 flush = trace->oe.last - NSEC_PER_SEC;
3725 /* Is there some thing to flush.. */
3726 if (first && first < flush)
3727 return ordered_events__flush_time(&trace->oe.data, flush);
3732 static int trace__flush_events(struct trace *trace)
3734 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3737 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3741 if (!trace->sort_events)
3742 return __trace__deliver_event(trace, event);
3744 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3745 if (err && err != -1)
3748 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3752 return trace__flush_events(trace);
3755 static int ordered_events__deliver_event(struct ordered_events *oe,
3756 struct ordered_event *event)
3758 struct trace *trace = container_of(oe, struct trace, oe.data);
3760 return __trace__deliver_event(trace, event->event);
3763 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3765 struct tep_format_field *field;
3766 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3768 if (evsel->tp_format == NULL || fmt == NULL)
3771 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3772 if (strcmp(field->name, arg) == 0)
3778 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3780 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3782 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3783 char *right = tok + 1, *right_end;
3788 while (isspace(*right))
3794 while (!isalpha(*left))
3795 if (++left == tok) {
3797 * Bail out, can't find the name of the argument that is being
3798 * used in the filter, let it try to set this filter, will fail later.
3803 right_end = right + 1;
3804 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3807 if (isalpha(*right)) {
3808 struct syscall_arg_fmt *fmt;
3809 int left_size = tok - left,
3810 right_size = right_end - right;
3813 while (isspace(left[left_size - 1]))
3816 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3818 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3820 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3821 arg, evsel->name, evsel->filter);
3825 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3826 arg, (int)(right - tok), tok, right_size, right);
3830 struct syscall_arg syscall_arg = {
3834 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3835 char *n, expansion[19];
3836 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3837 int expansion_offset = right - new_filter;
3839 pr_debug("%s", expansion);
3841 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3842 pr_debug(" out of memory!\n");
3846 if (new_filter != evsel->filter)
3848 left = n + expansion_offset + expansion_lenght;
3851 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3852 right_size, right, arg, evsel->name, evsel->filter);
3856 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3857 arg, evsel->name, evsel->filter);
3867 if (new_filter != evsel->filter) {
3868 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3869 evsel__set_filter(evsel, new_filter);
3876 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3878 struct evlist *evlist = trace->evlist;
3879 struct evsel *evsel;
3881 evlist__for_each_entry(evlist, evsel) {
3882 if (evsel->filter == NULL)
3885 if (trace__expand_filter(trace, evsel)) {
3894 static int trace__run(struct trace *trace, int argc, const char **argv)
3896 struct evlist *evlist = trace->evlist;
3897 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3899 unsigned long before;
3900 const bool forks = argc > 0;
3901 bool draining = false;
3905 if (!trace->raw_augmented_syscalls) {
3906 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3907 goto out_error_raw_syscalls;
3909 if (trace->trace_syscalls)
3910 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3913 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3914 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3915 if (pgfault_maj == NULL)
3917 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3918 evlist__add(evlist, pgfault_maj);
3921 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3922 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3923 if (pgfault_min == NULL)
3925 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3926 evlist__add(evlist, pgfault_min);
3930 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3931 goto out_error_sched_stat_runtime;
3933 * If a global cgroup was set, apply it to all the events without an
3934 * explicit cgroup. I.e.:
3936 * trace -G A -e sched:*switch
3938 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3939 * _and_ sched:sched_switch to the 'A' cgroup, while:
3941 * trace -e sched:*switch -G A
3943 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3944 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3945 * a cgroup (on the root cgroup, sys wide, etc).
3949 * trace -G A -e sched:*switch -G B
3951 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3952 * to the 'B' cgroup.
3954 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3955 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3958 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3960 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3962 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3963 goto out_delete_evlist;
3966 err = trace__symbols_init(trace, evlist);
3968 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3969 goto out_delete_evlist;
3972 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3974 signal(SIGCHLD, sig_handler);
3975 signal(SIGINT, sig_handler);
3978 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3981 fprintf(trace->output, "Couldn't run the workload!\n");
3982 goto out_delete_evlist;
3986 err = evlist__open(evlist);
3988 goto out_error_open;
3990 err = bpf__apply_obj_config();
3992 char errbuf[BUFSIZ];
3994 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3995 pr_err("ERROR: Apply config to BPF failed: %s\n",
3997 goto out_error_open;
4000 err = trace__set_filter_pids(trace);
4004 if (trace->syscalls.map)
4005 trace__init_syscalls_bpf_map(trace);
4007 if (trace->syscalls.prog_array.sys_enter)
4008 trace__init_syscalls_bpf_prog_array_maps(trace);
4010 if (trace->ev_qualifier_ids.nr > 0) {
4011 err = trace__set_ev_qualifier_filter(trace);
4015 if (trace->syscalls.events.sys_exit) {
4016 pr_debug("event qualifier tracepoint filter: %s\n",
4017 trace->syscalls.events.sys_exit->filter);
4022 * If the "close" syscall is not traced, then we will not have the
4023 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
4024 * fd->pathname table and were ending up showing the last value set by
4025 * syscalls opening a pathname and associating it with a descriptor or
4026 * reading it from /proc/pid/fd/ in cases where that doesn't make
4029 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
4032 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4034 err = trace__expand_filters(trace, &evsel);
4036 goto out_delete_evlist;
4037 err = perf_evlist__apply_filters(evlist, &evsel);
4039 goto out_error_apply_filters;
4041 if (trace->dump.map)
4042 bpf_map__fprintf(trace->dump.map, trace->output);
4044 err = evlist__mmap(evlist, trace->opts.mmap_pages);
4046 goto out_error_mmap;
4048 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
4049 evlist__enable(evlist);
4052 perf_evlist__start_workload(evlist);
4054 if (trace->opts.initial_delay) {
4055 usleep(trace->opts.initial_delay * 1000);
4056 evlist__enable(evlist);
4059 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4060 evlist->core.threads->nr > 1 ||
4061 evlist__first(evlist)->core.attr.inherit;
4064 * Now that we already used evsel->core.attr to ask the kernel to setup the
4065 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4066 * trace__resolve_callchain(), allowing per-event max-stack settings
4067 * to override an explicitly set --max-stack global setting.
4069 evlist__for_each_entry(evlist, evsel) {
4070 if (evsel__has_callchain(evsel) &&
4071 evsel->core.attr.sample_max_stack == 0)
4072 evsel->core.attr.sample_max_stack = trace->max_stack;
4075 before = trace->nr_events;
4077 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4078 union perf_event *event;
4081 md = &evlist->mmap[i];
4082 if (perf_mmap__read_init(&md->core) < 0)
4085 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4088 err = trace__deliver_event(trace, event);
4092 perf_mmap__consume(&md->core);
4097 if (done && !draining) {
4098 evlist__disable(evlist);
4102 perf_mmap__read_done(&md->core);
4105 if (trace->nr_events == before) {
4106 int timeout = done ? 100 : -1;
4108 if (!draining && evlist__poll(evlist, timeout) > 0) {
4109 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4114 if (trace__flush_events(trace))
4122 thread__zput(trace->current);
4124 evlist__disable(evlist);
4126 if (trace->sort_events)
4127 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4131 trace__fprintf_thread_summary(trace, trace->output);
4133 if (trace->show_tool_stats) {
4134 fprintf(trace->output, "Stats:\n "
4135 " vfs_getname : %" PRIu64 "\n"
4136 " proc_getname: %" PRIu64 "\n",
4137 trace->stats.vfs_getname,
4138 trace->stats.proc_getname);
4143 trace__symbols__exit(trace);
4145 evlist__delete(evlist);
4146 cgroup__put(trace->cgroup);
4147 trace->evlist = NULL;
4148 trace->live = false;
4151 char errbuf[BUFSIZ];
4153 out_error_sched_stat_runtime:
4154 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4157 out_error_raw_syscalls:
4158 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4162 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4166 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4169 fprintf(trace->output, "%s\n", errbuf);
4170 goto out_delete_evlist;
4172 out_error_apply_filters:
4173 fprintf(trace->output,
4174 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4175 evsel->filter, evsel__name(evsel), errno,
4176 str_error_r(errno, errbuf, sizeof(errbuf)));
4177 goto out_delete_evlist;
4180 fprintf(trace->output, "Not enough memory to run!\n");
4181 goto out_delete_evlist;
4184 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4185 goto out_delete_evlist;
4188 static int trace__replay(struct trace *trace)
4190 const struct evsel_str_handler handlers[] = {
4191 { "probe:vfs_getname", trace__vfs_getname, },
4193 struct perf_data data = {
4195 .mode = PERF_DATA_MODE_READ,
4196 .force = trace->force,
4198 struct perf_session *session;
4199 struct evsel *evsel;
4202 trace->tool.sample = trace__process_sample;
4203 trace->tool.mmap = perf_event__process_mmap;
4204 trace->tool.mmap2 = perf_event__process_mmap2;
4205 trace->tool.comm = perf_event__process_comm;
4206 trace->tool.exit = perf_event__process_exit;
4207 trace->tool.fork = perf_event__process_fork;
4208 trace->tool.attr = perf_event__process_attr;
4209 trace->tool.tracing_data = perf_event__process_tracing_data;
4210 trace->tool.build_id = perf_event__process_build_id;
4211 trace->tool.namespaces = perf_event__process_namespaces;
4213 trace->tool.ordered_events = true;
4214 trace->tool.ordering_requires_timestamps = true;
4216 /* add tid to output */
4217 trace->multiple_threads = true;
4219 session = perf_session__new(&data, false, &trace->tool);
4220 if (IS_ERR(session))
4221 return PTR_ERR(session);
4223 if (trace->opts.target.pid)
4224 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4226 if (trace->opts.target.tid)
4227 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4229 if (symbol__init(&session->header.env) < 0)
4232 trace->host = &session->machines.host;
4234 err = perf_session__set_tracepoints_handlers(session, handlers);
4238 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4239 "raw_syscalls:sys_enter");
4240 /* older kernels have syscalls tp versus raw_syscalls */
4242 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4243 "syscalls:sys_enter");
4246 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4247 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4248 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4252 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4253 "raw_syscalls:sys_exit");
4255 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4256 "syscalls:sys_exit");
4258 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4259 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4260 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4264 evlist__for_each_entry(session->evlist, evsel) {
4265 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4266 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4267 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4268 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4269 evsel->handler = trace__pgfault;
4274 err = perf_session__process_events(session);
4276 pr_err("Failed to process events, error %d", err);
4278 else if (trace->summary)
4279 trace__fprintf_thread_summary(trace, trace->output);
4282 perf_session__delete(session);
4287 static size_t trace__fprintf_threads_header(FILE *fp)
4291 printed = fprintf(fp, "\n Summary of events:\n\n");
4296 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4297 struct syscall_stats *stats;
4302 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4303 struct syscall_stats *stats = source->priv;
4305 entry->syscall = source->i;
4306 entry->stats = stats;
4307 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4310 static size_t thread__dump_stats(struct thread_trace *ttrace,
4311 struct trace *trace, FILE *fp)
4316 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4318 if (syscall_stats == NULL)
4321 printed += fprintf(fp, "\n");
4323 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4324 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4325 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4327 resort_rb__for_each_entry(nd, syscall_stats) {
4328 struct syscall_stats *stats = syscall_stats_entry->stats;
4330 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4331 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4332 double avg = avg_stats(&stats->stats);
4334 u64 n = (u64)stats->stats.n;
4336 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4337 avg /= NSEC_PER_MSEC;
4339 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4340 printed += fprintf(fp, " %-15s", sc->name);
4341 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4342 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4343 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4345 if (trace->errno_summary && stats->nr_failures) {
4346 const char *arch_name = perf_env__arch(trace->host->env);
4349 for (e = 0; e < stats->max_errno; ++e) {
4350 if (stats->errnos[e] != 0)
4351 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4357 resort_rb__delete(syscall_stats);
4358 printed += fprintf(fp, "\n\n");
4363 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4366 struct thread_trace *ttrace = thread__priv(thread);
4372 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4374 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4375 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4376 printed += fprintf(fp, "%.1f%%", ratio);
4378 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4380 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4382 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4383 else if (fputc('\n', fp) != EOF)
4386 printed += thread__dump_stats(ttrace, trace, fp);
4391 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4393 return ttrace ? ttrace->nr_events : 0;
4396 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4397 struct thread *thread;
4400 entry->thread = rb_entry(nd, struct thread, rb_node);
4403 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4405 size_t printed = trace__fprintf_threads_header(fp);
4409 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4410 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4412 if (threads == NULL) {
4413 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4417 resort_rb__for_each_entry(nd, threads)
4418 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4420 resort_rb__delete(threads);
4425 static int trace__set_duration(const struct option *opt, const char *str,
4426 int unset __maybe_unused)
4428 struct trace *trace = opt->value;
4430 trace->duration_filter = atof(str);
4434 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4435 int unset __maybe_unused)
4439 struct trace *trace = opt->value;
4441 * FIXME: introduce a intarray class, plain parse csv and create a
4442 * { int nr, int entries[] } struct...
4444 struct intlist *list = intlist__new(str);
4449 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4450 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4452 if (trace->filter_pids.entries == NULL)
4455 trace->filter_pids.entries[0] = getpid();
4457 for (i = 1; i < trace->filter_pids.nr; ++i)
4458 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4460 intlist__delete(list);
4466 static int trace__open_output(struct trace *trace, const char *filename)
4470 if (!stat(filename, &st) && st.st_size) {
4471 char oldname[PATH_MAX];
4473 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4475 rename(filename, oldname);
4478 trace->output = fopen(filename, "w");
4480 return trace->output == NULL ? -errno : 0;
4483 static int parse_pagefaults(const struct option *opt, const char *str,
4484 int unset __maybe_unused)
4486 int *trace_pgfaults = opt->value;
4488 if (strcmp(str, "all") == 0)
4489 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4490 else if (strcmp(str, "maj") == 0)
4491 *trace_pgfaults |= TRACE_PFMAJ;
4492 else if (strcmp(str, "min") == 0)
4493 *trace_pgfaults |= TRACE_PFMIN;
4500 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4502 struct evsel *evsel;
4504 evlist__for_each_entry(evlist, evsel) {
4505 if (evsel->handler == NULL)
4506 evsel->handler = handler;
4510 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4512 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4515 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4520 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4521 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4524 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4529 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4531 struct evsel *evsel;
4533 evlist__for_each_entry(evlist, evsel) {
4534 if (evsel->priv || !evsel->tp_format)
4537 if (strcmp(evsel->tp_format->system, "syscalls")) {
4538 evsel__init_tp_arg_scnprintf(evsel);
4542 if (evsel__init_syscall_tp(evsel))
4545 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4546 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4548 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4551 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4552 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4553 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4555 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4558 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4566 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4567 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4568 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4570 * It'd be better to introduce a parse_options() variant that would return a
4571 * list with the terms it didn't match to an event...
4573 static int trace__parse_events_option(const struct option *opt, const char *str,
4574 int unset __maybe_unused)
4576 struct trace *trace = (struct trace *)opt->value;
4577 const char *s = str;
4578 char *sep = NULL, *lists[2] = { NULL, NULL, };
4579 int len = strlen(str) + 1, err = -1, list, idx;
4580 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4581 char group_name[PATH_MAX];
4582 struct syscall_fmt *fmt;
4584 if (strace_groups_dir == NULL)
4589 trace->not_ev_qualifier = true;
4593 if ((sep = strchr(s, ',')) != NULL)
4597 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4598 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4603 fmt = syscall_fmt__find_by_alias(s);
4608 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4609 if (access(group_name, R_OK) == 0)
4614 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4616 lists[list] = malloc(len);
4617 if (lists[list] == NULL)
4619 strcpy(lists[list], s);
4629 if (lists[1] != NULL) {
4630 struct strlist_config slist_config = {
4631 .dirname = strace_groups_dir,
4634 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4635 if (trace->ev_qualifier == NULL) {
4636 fputs("Not enough memory to parse event qualifier", trace->output);
4640 if (trace__validate_ev_qualifier(trace))
4642 trace->trace_syscalls = true;
4649 .value = &trace->evlist,
4651 err = parse_events_option(&o, lists[0], 0);
4660 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4662 struct trace *trace = opt->value;
4664 if (!list_empty(&trace->evlist->core.entries)) {
4666 .value = &trace->evlist,
4668 return parse_cgroups(&o, str, unset);
4670 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4675 static int trace__config(const char *var, const char *value, void *arg)
4677 struct trace *trace = arg;
4680 if (!strcmp(var, "trace.add_events")) {
4681 trace->perfconfig_events = strdup(value);
4682 if (trace->perfconfig_events == NULL) {
4683 pr_err("Not enough memory for %s\n", "trace.add_events");
4686 } else if (!strcmp(var, "trace.show_timestamp")) {
4687 trace->show_tstamp = perf_config_bool(var, value);
4688 } else if (!strcmp(var, "trace.show_duration")) {
4689 trace->show_duration = perf_config_bool(var, value);
4690 } else if (!strcmp(var, "trace.show_arg_names")) {
4691 trace->show_arg_names = perf_config_bool(var, value);
4692 if (!trace->show_arg_names)
4693 trace->show_zeros = true;
4694 } else if (!strcmp(var, "trace.show_zeros")) {
4695 bool new_show_zeros = perf_config_bool(var, value);
4696 if (!trace->show_arg_names && !new_show_zeros) {
4697 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4700 trace->show_zeros = new_show_zeros;
4701 } else if (!strcmp(var, "trace.show_prefix")) {
4702 trace->show_string_prefix = perf_config_bool(var, value);
4703 } else if (!strcmp(var, "trace.no_inherit")) {
4704 trace->opts.no_inherit = perf_config_bool(var, value);
4705 } else if (!strcmp(var, "trace.args_alignment")) {
4706 int args_alignment = 0;
4707 if (perf_config_int(&args_alignment, var, value) == 0)
4708 trace->args_alignment = args_alignment;
4709 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4710 if (strcasecmp(value, "libtraceevent") == 0)
4711 trace->libtraceevent_print = true;
4712 else if (strcasecmp(value, "libbeauty") == 0)
4713 trace->libtraceevent_print = false;
4719 int cmd_trace(int argc, const char **argv)
4721 const char *trace_usage[] = {
4722 "perf trace [<options>] [<command>]",
4723 "perf trace [<options>] -- <command> [<options>]",
4724 "perf trace record [<options>] [<command>]",
4725 "perf trace record [<options>] -- <command> [<options>]",
4728 struct trace trace = {
4734 .user_freq = UINT_MAX,
4735 .user_interval = ULLONG_MAX,
4736 .no_buffering = true,
4737 .mmap_pages = UINT_MAX,
4741 .show_tstamp = true,
4742 .show_duration = true,
4743 .show_arg_names = true,
4744 .args_alignment = 70,
4745 .trace_syscalls = false,
4746 .kernel_syscallchains = false,
4747 .max_stack = UINT_MAX,
4748 .max_events = ULONG_MAX,
4750 const char *map_dump_str = NULL;
4751 const char *output_name = NULL;
4752 const struct option trace_options[] = {
4753 OPT_CALLBACK('e', "event", &trace, "event",
4754 "event/syscall selector. use 'perf list' to list available events",
4755 trace__parse_events_option),
4756 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4757 "event filter", parse_filter),
4758 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4759 "show the thread COMM next to its id"),
4760 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4761 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4762 trace__parse_events_option),
4763 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4764 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4765 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4766 "trace events on existing process id"),
4767 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4768 "trace events on existing thread id"),
4769 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4770 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4771 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4772 "system-wide collection from all CPUs"),
4773 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4774 "list of cpus to monitor"),
4775 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4776 "child tasks do not inherit counters"),
4777 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4778 "number of mmap data pages",
4779 perf_evlist__parse_mmap_pages),
4780 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4782 OPT_CALLBACK(0, "duration", &trace, "float",
4783 "show only events with duration > N.M ms",
4784 trace__set_duration),
4785 #ifdef HAVE_LIBBPF_SUPPORT
4786 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4788 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4789 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4790 OPT_BOOLEAN('T', "time", &trace.full_time,
4791 "Show full timestamp, not time relative to first start"),
4792 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4793 "Show only syscalls that failed"),
4794 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4795 "Show only syscall summary with statistics"),
4796 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4797 "Show all syscalls and summary with statistics"),
4798 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4799 "Show errno stats per syscall, use with -s or -S"),
4800 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4801 "Trace pagefaults", parse_pagefaults, "maj"),
4802 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4803 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4804 OPT_CALLBACK(0, "call-graph", &trace.opts,
4805 "record_mode[,record_size]", record_callchain_help,
4806 &record_parse_callchain_opt),
4807 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4808 "Use libtraceevent to print the tracepoint arguments."),
4809 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4810 "Show the kernel callchains on the syscall exit path"),
4811 OPT_ULONG(0, "max-events", &trace.max_events,
4812 "Set the maximum number of events to print, exit after that is reached. "),
4813 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4814 "Set the minimum stack depth when parsing the callchain, "
4815 "anything below the specified depth will be ignored."),
4816 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4817 "Set the maximum stack depth when parsing the callchain, "
4818 "anything beyond the specified depth will be ignored. "
4819 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4820 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4821 "Sort batch of events before processing, use if getting out of order events"),
4822 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4823 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4824 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4825 "per thread proc mmap processing timeout in ms"),
4826 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4827 trace__parse_cgroups),
4828 OPT_INTEGER('D', "delay", &trace.opts.initial_delay,
4829 "ms to wait before starting measurement after program "
4831 OPTS_EVSWITCH(&trace.evswitch),
4834 bool __maybe_unused max_stack_user_set = true;
4835 bool mmap_pages_user_set = true;
4836 struct evsel *evsel;
4837 const char * const trace_subcommands[] = { "record", NULL };
4841 signal(SIGSEGV, sighandler_dump_stack);
4842 signal(SIGFPE, sighandler_dump_stack);
4844 trace.evlist = evlist__new();
4845 trace.sctbl = syscalltbl__new();
4847 if (trace.evlist == NULL || trace.sctbl == NULL) {
4848 pr_err("Not enough memory to run!\n");
4854 * Parsing .perfconfig may entail creating a BPF event, that may need
4855 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4856 * is too small. This affects just this process, not touching the
4857 * global setting. If it fails we'll get something in 'perf trace -v'
4858 * to help diagnose the problem.
4860 rlimit__bump_memlock();
4862 err = perf_config(trace__config, &trace);
4866 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4867 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4870 * Here we already passed thru trace__parse_events_option() and it has
4871 * already figured out if -e syscall_name, if not but if --event
4872 * foo:bar was used, the user is interested _just_ in those, say,
4873 * tracepoint events, not in the strace-like syscall-name-based mode.
4875 * This is important because we need to check if strace-like mode is
4876 * needed to decided if we should filter out the eBPF
4877 * __augmented_syscalls__ code, if it is in the mix, say, via
4878 * .perfconfig trace.add_events, and filter those out.
4880 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4881 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4882 trace.trace_syscalls = true;
4885 * Now that we have --verbose figured out, lets see if we need to parse
4886 * events from .perfconfig, so that if those events fail parsing, say some
4887 * BPF program fails, then we'll be able to use --verbose to see what went
4888 * wrong in more detail.
4890 if (trace.perfconfig_events != NULL) {
4891 struct parse_events_error parse_err;
4893 bzero(&parse_err, sizeof(parse_err));
4894 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4896 parse_events_print_error(&parse_err, trace.perfconfig_events);
4901 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4902 usage_with_options_msg(trace_usage, trace_options,
4903 "cgroup monitoring only available in system-wide mode");
4906 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4907 if (IS_ERR(evsel)) {
4908 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4909 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4914 trace.syscalls.events.augmented = evsel;
4916 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4917 if (evsel == NULL) {
4918 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4922 if (evsel->bpf_obj == NULL) {
4923 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4927 trace.bpf_obj = evsel->bpf_obj;
4930 * If we have _just_ the augmenter event but don't have a
4931 * explicit --syscalls, then assume we want all strace-like
4934 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4935 trace.trace_syscalls = true;
4937 * So, if we have a syscall augmenter, but trace_syscalls, aka
4938 * strace-like syscall tracing is not set, then we need to trow
4939 * away the augmenter, i.e. all the events that were created
4940 * from that BPF object file.
4942 * This is more to fix the current .perfconfig trace.add_events
4943 * style of setting up the strace-like eBPF based syscall point
4944 * payload augmenter.
4946 * All this complexity will be avoided by adding an alternative
4947 * to trace.add_events in the form of
4948 * trace.bpf_augmented_syscalls, that will be only parsed if we
4951 * .perfconfig trace.add_events is still useful if we want, for
4952 * instance, have msr_write.msr in some .perfconfig profile based
4953 * 'perf trace --config determinism.profile' mode, where for some
4954 * particular goal/workload type we want a set of events and
4955 * output mode (with timings, etc) instead of having to add
4956 * all via the command line.
4958 * Also --config to specify an alternate .perfconfig file needs
4959 * to be implemented.
4961 if (!trace.trace_syscalls) {
4962 trace__delete_augmented_syscalls(&trace);
4964 trace__set_bpf_map_filtered_pids(&trace);
4965 trace__set_bpf_map_syscalls(&trace);
4966 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4970 err = bpf__setup_stdout(trace.evlist);
4972 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4973 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4980 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4981 if (trace.dump.map == NULL) {
4982 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4987 if (trace.trace_pgfaults) {
4988 trace.opts.sample_address = true;
4989 trace.opts.sample_time = true;
4992 if (trace.opts.mmap_pages == UINT_MAX)
4993 mmap_pages_user_set = false;
4995 if (trace.max_stack == UINT_MAX) {
4996 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4997 max_stack_user_set = false;
5000 #ifdef HAVE_DWARF_UNWIND_SUPPORT
5001 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
5002 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
5006 if (callchain_param.enabled) {
5007 if (!mmap_pages_user_set && geteuid() == 0)
5008 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
5010 symbol_conf.use_callchain = true;
5013 if (trace.evlist->core.nr_entries > 0) {
5014 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
5015 if (evlist__set_syscall_tp_fields(trace.evlist)) {
5016 perror("failed to set syscalls:* tracepoint fields");
5021 if (trace.sort_events) {
5022 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
5023 ordered_events__set_copy_on_queue(&trace.oe.data, true);
5027 * If we are augmenting syscalls, then combine what we put in the
5028 * __augmented_syscalls__ BPF map with what is in the
5029 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
5030 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
5032 * We'll switch to look at two BPF maps, one for sys_enter and the
5033 * other for sys_exit when we start augmenting the sys_exit paths with
5034 * buffers that are being copied from kernel to userspace, think 'read'
5037 if (trace.syscalls.events.augmented) {
5038 evlist__for_each_entry(trace.evlist, evsel) {
5039 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
5041 if (raw_syscalls_sys_exit) {
5042 trace.raw_augmented_syscalls = true;
5043 goto init_augmented_syscall_tp;
5046 if (trace.syscalls.events.augmented->priv == NULL &&
5047 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5048 struct evsel *augmented = trace.syscalls.events.augmented;
5049 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5050 evsel__init_augmented_syscall_tp_args(augmented))
5053 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5054 * Above we made sure we can get from the payload the tp fields
5055 * that we get from syscalls:sys_enter tracefs format file.
5057 augmented->handler = trace__sys_enter;
5059 * Now we do the same for the *syscalls:sys_enter event so that
5060 * if we handle it directly, i.e. if the BPF prog returns 0 so
5061 * as not to filter it, then we'll handle it just like we would
5062 * for the BPF_OUTPUT one:
5064 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5065 evsel__init_augmented_syscall_tp_args(evsel))
5067 evsel->handler = trace__sys_enter;
5070 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5071 struct syscall_tp *sc;
5072 init_augmented_syscall_tp:
5073 if (evsel__init_augmented_syscall_tp(evsel, evsel))
5075 sc = __evsel__syscall_tp(evsel);
5077 * For now with BPF raw_augmented we hook into
5078 * raw_syscalls:sys_enter and there we get all
5079 * 6 syscall args plus the tracepoint common
5080 * fields and the syscall_nr (another long).
5081 * So we check if that is the case and if so
5082 * don't look after the sc->args_size but
5083 * always after the full raw_syscalls:sys_enter
5084 * payload, which is fixed.
5086 * We'll revisit this later to pass
5087 * s->args_size to the BPF augmenter (now
5088 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5089 * so that it copies only what we need for each
5090 * syscall, like what happens when we use
5091 * syscalls:sys_enter_NAME, so that we reduce
5092 * the kernel/userspace traffic to just what is
5093 * needed for each syscall.
5095 if (trace.raw_augmented_syscalls)
5096 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5097 evsel__init_augmented_syscall_tp_ret(evsel);
5098 evsel->handler = trace__sys_exit;
5103 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5104 return trace__record(&trace, argc-1, &argv[1]);
5106 /* Using just --errno-summary will trigger --summary */
5107 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5108 trace.summary_only = true;
5110 /* summary_only implies summary option, but don't overwrite summary if set */
5111 if (trace.summary_only)
5112 trace.summary = trace.summary_only;
5114 if (output_name != NULL) {
5115 err = trace__open_output(&trace, output_name);
5117 perror("failed to create output file");
5122 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5126 err = target__validate(&trace.opts.target);
5128 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5129 fprintf(trace.output, "%s", bf);
5133 err = target__parse_uid(&trace.opts.target);
5135 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5136 fprintf(trace.output, "%s", bf);
5140 if (!argc && target__none(&trace.opts.target))
5141 trace.opts.target.system_wide = true;
5144 err = trace__replay(&trace);
5146 err = trace__run(&trace, argc, argv);
5149 if (output_name != NULL)
5150 fclose(trace.output);
5152 zfree(&trace.perfconfig_events);