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TOMOYO Linux Cross Reference
Linux/tools/perf/builtin-trace.c

Version: ~ [ linux-5.12 ] ~ [ linux-5.11.16 ] ~ [ linux-5.10.32 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.114 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.188 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.231 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.267 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.267 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * builtin-trace.c
  3  *
  4  * Builtin 'trace' command:
  5  *
  6  * Display a continuously updated trace of any workload, CPU, specific PID,
  7  * system wide, etc.  Default format is loosely strace like, but any other
  8  * event may be specified using --event.
  9  *
 10  * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
 11  *
 12  * Initially based on the 'trace' prototype by Thomas Gleixner:
 13  *
 14  * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
 15  */
 16 
 17 #include "util/record.h"
 18 #include <traceevent/event-parse.h>
 19 #include <api/fs/tracing_path.h>
 20 #include <bpf/bpf.h>
 21 #include "util/bpf_map.h"
 22 #include "util/rlimit.h"
 23 #include "builtin.h"
 24 #include "util/cgroup.h"
 25 #include "util/color.h"
 26 #include "util/config.h"
 27 #include "util/debug.h"
 28 #include "util/dso.h"
 29 #include "util/env.h"
 30 #include "util/event.h"
 31 #include "util/evsel.h"
 32 #include "util/evsel_fprintf.h"
 33 #include "util/synthetic-events.h"
 34 #include "util/evlist.h"
 35 #include "util/evswitch.h"
 36 #include "util/mmap.h"
 37 #include <subcmd/pager.h>
 38 #include <subcmd/exec-cmd.h>
 39 #include "util/machine.h"
 40 #include "util/map.h"
 41 #include "util/symbol.h"
 42 #include "util/path.h"
 43 #include "util/session.h"
 44 #include "util/thread.h"
 45 #include <subcmd/parse-options.h>
 46 #include "util/strlist.h"
 47 #include "util/intlist.h"
 48 #include "util/thread_map.h"
 49 #include "util/stat.h"
 50 #include "util/tool.h"
 51 #include "util/util.h"
 52 #include "trace/beauty/beauty.h"
 53 #include "trace-event.h"
 54 #include "util/parse-events.h"
 55 #include "util/bpf-loader.h"
 56 #include "callchain.h"
 57 #include "print_binary.h"
 58 #include "string2.h"
 59 #include "syscalltbl.h"
 60 #include "rb_resort.h"
 61 #include "../perf.h"
 62 
 63 #include <errno.h>
 64 #include <inttypes.h>
 65 #include <poll.h>
 66 #include <signal.h>
 67 #include <stdlib.h>
 68 #include <string.h>
 69 #include <linux/err.h>
 70 #include <linux/filter.h>
 71 #include <linux/kernel.h>
 72 #include <linux/random.h>
 73 #include <linux/stringify.h>
 74 #include <linux/time64.h>
 75 #include <linux/zalloc.h>
 76 #include <fcntl.h>
 77 #include <sys/sysmacros.h>
 78 
 79 #include <linux/ctype.h>
 80 #include <perf/mmap.h>
 81 
 82 #ifndef O_CLOEXEC
 83 # define O_CLOEXEC              02000000
 84 #endif
 85 
 86 #ifndef F_LINUX_SPECIFIC_BASE
 87 # define F_LINUX_SPECIFIC_BASE  1024
 88 #endif
 89 
 90 /*
 91  * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
 92  */
 93 struct syscall_arg_fmt {
 94         size_t     (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
 95         bool       (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
 96         unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
 97         void       *parm;
 98         const char *name;
 99         u16        nr_entries; // for arrays
100         bool       show_zero;
101 };
102 
103 struct syscall_fmt {
104         const char *name;
105         const char *alias;
106         struct {
107                 const char *sys_enter,
108                            *sys_exit;
109         }          bpf_prog_name;
110         struct syscall_arg_fmt arg[6];
111         u8         nr_args;
112         bool       errpid;
113         bool       timeout;
114         bool       hexret;
115 };
116 
117 struct trace {
118         struct perf_tool        tool;
119         struct syscalltbl       *sctbl;
120         struct {
121                 struct syscall  *table;
122                 struct bpf_map  *map;
123                 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
124                         struct bpf_map  *sys_enter,
125                                         *sys_exit;
126                 }               prog_array;
127                 struct {
128                         struct evsel *sys_enter,
129                                           *sys_exit,
130                                           *augmented;
131                 }               events;
132                 struct bpf_program *unaugmented_prog;
133         } syscalls;
134         struct {
135                 struct bpf_map *map;
136         } dump;
137         struct record_opts      opts;
138         struct evlist   *evlist;
139         struct machine          *host;
140         struct thread           *current;
141         struct bpf_object       *bpf_obj;
142         struct cgroup           *cgroup;
143         u64                     base_time;
144         FILE                    *output;
145         unsigned long           nr_events;
146         unsigned long           nr_events_printed;
147         unsigned long           max_events;
148         struct evswitch         evswitch;
149         struct strlist          *ev_qualifier;
150         struct {
151                 size_t          nr;
152                 int             *entries;
153         }                       ev_qualifier_ids;
154         struct {
155                 size_t          nr;
156                 pid_t           *entries;
157                 struct bpf_map  *map;
158         }                       filter_pids;
159         double                  duration_filter;
160         double                  runtime_ms;
161         struct {
162                 u64             vfs_getname,
163                                 proc_getname;
164         } stats;
165         unsigned int            max_stack;
166         unsigned int            min_stack;
167         int                     raw_augmented_syscalls_args_size;
168         bool                    raw_augmented_syscalls;
169         bool                    fd_path_disabled;
170         bool                    sort_events;
171         bool                    not_ev_qualifier;
172         bool                    live;
173         bool                    full_time;
174         bool                    sched;
175         bool                    multiple_threads;
176         bool                    summary;
177         bool                    summary_only;
178         bool                    errno_summary;
179         bool                    failure_only;
180         bool                    show_comm;
181         bool                    print_sample;
182         bool                    show_tool_stats;
183         bool                    trace_syscalls;
184         bool                    libtraceevent_print;
185         bool                    kernel_syscallchains;
186         s16                     args_alignment;
187         bool                    show_tstamp;
188         bool                    show_duration;
189         bool                    show_zeros;
190         bool                    show_arg_names;
191         bool                    show_string_prefix;
192         bool                    force;
193         bool                    vfs_getname;
194         int                     trace_pgfaults;
195         char                    *perfconfig_events;
196         struct {
197                 struct ordered_events   data;
198                 u64                     last;
199         } oe;
200 };
201 
202 struct tp_field {
203         int offset;
204         union {
205                 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
206                 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
207         };
208 };
209 
210 #define TP_UINT_FIELD(bits) \
211 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
212 { \
213         u##bits value; \
214         memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
215         return value;  \
216 }
217 
218 TP_UINT_FIELD(8);
219 TP_UINT_FIELD(16);
220 TP_UINT_FIELD(32);
221 TP_UINT_FIELD(64);
222 
223 #define TP_UINT_FIELD__SWAPPED(bits) \
224 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
225 { \
226         u##bits value; \
227         memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
228         return bswap_##bits(value);\
229 }
230 
231 TP_UINT_FIELD__SWAPPED(16);
232 TP_UINT_FIELD__SWAPPED(32);
233 TP_UINT_FIELD__SWAPPED(64);
234 
235 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
236 {
237         field->offset = offset;
238 
239         switch (size) {
240         case 1:
241                 field->integer = tp_field__u8;
242                 break;
243         case 2:
244                 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
245                 break;
246         case 4:
247                 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
248                 break;
249         case 8:
250                 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
251                 break;
252         default:
253                 return -1;
254         }
255 
256         return 0;
257 }
258 
259 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
260 {
261         return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
262 }
263 
264 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
265 {
266         return sample->raw_data + field->offset;
267 }
268 
269 static int __tp_field__init_ptr(struct tp_field *field, int offset)
270 {
271         field->offset = offset;
272         field->pointer = tp_field__ptr;
273         return 0;
274 }
275 
276 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
277 {
278         return __tp_field__init_ptr(field, format_field->offset);
279 }
280 
281 struct syscall_tp {
282         struct tp_field id;
283         union {
284                 struct tp_field args, ret;
285         };
286 };
287 
288 /*
289  * The evsel->priv as used by 'perf trace'
290  * sc:  for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
291  * fmt: for all the other tracepoints
292  */
293 struct evsel_trace {
294         struct syscall_tp       sc;
295         struct syscall_arg_fmt  *fmt;
296 };
297 
298 static struct evsel_trace *evsel_trace__new(void)
299 {
300         return zalloc(sizeof(struct evsel_trace));
301 }
302 
303 static void evsel_trace__delete(struct evsel_trace *et)
304 {
305         if (et == NULL)
306                 return;
307 
308         zfree(&et->fmt);
309         free(et);
310 }
311 
312 /*
313  * Used with raw_syscalls:sys_{enter,exit} and with the
314  * syscalls:sys_{enter,exit}_SYSCALL tracepoints
315  */
316 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
317 {
318         struct evsel_trace *et = evsel->priv;
319 
320         return &et->sc;
321 }
322 
323 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
324 {
325         if (evsel->priv == NULL) {
326                 evsel->priv = evsel_trace__new();
327                 if (evsel->priv == NULL)
328                         return NULL;
329         }
330 
331         return __evsel__syscall_tp(evsel);
332 }
333 
334 /*
335  * Used with all the other tracepoints.
336  */
337 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
338 {
339         struct evsel_trace *et = evsel->priv;
340 
341         return et->fmt;
342 }
343 
344 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
345 {
346         struct evsel_trace *et = evsel->priv;
347 
348         if (evsel->priv == NULL) {
349                 et = evsel->priv = evsel_trace__new();
350 
351                 if (et == NULL)
352                         return NULL;
353         }
354 
355         if (et->fmt == NULL) {
356                 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
357                 if (et->fmt == NULL)
358                         goto out_delete;
359         }
360 
361         return __evsel__syscall_arg_fmt(evsel);
362 
363 out_delete:
364         evsel_trace__delete(evsel->priv);
365         evsel->priv = NULL;
366         return NULL;
367 }
368 
369 static int perf_evsel__init_tp_uint_field(struct evsel *evsel,
370                                           struct tp_field *field,
371                                           const char *name)
372 {
373         struct tep_format_field *format_field = perf_evsel__field(evsel, name);
374 
375         if (format_field == NULL)
376                 return -1;
377 
378         return tp_field__init_uint(field, format_field, evsel->needs_swap);
379 }
380 
381 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
382         ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
383            perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
384 
385 static int perf_evsel__init_tp_ptr_field(struct evsel *evsel,
386                                          struct tp_field *field,
387                                          const char *name)
388 {
389         struct tep_format_field *format_field = perf_evsel__field(evsel, name);
390 
391         if (format_field == NULL)
392                 return -1;
393 
394         return tp_field__init_ptr(field, format_field);
395 }
396 
397 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
398         ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
399            perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
400 
401 static void evsel__delete_priv(struct evsel *evsel)
402 {
403         zfree(&evsel->priv);
404         evsel__delete(evsel);
405 }
406 
407 static int perf_evsel__init_syscall_tp(struct evsel *evsel)
408 {
409         struct syscall_tp *sc = evsel__syscall_tp(evsel);
410 
411         if (sc != NULL) {
412                 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
413                     perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
414                         return -ENOENT;
415                 return 0;
416         }
417 
418         return -ENOMEM;
419 }
420 
421 static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
422 {
423         struct syscall_tp *sc = evsel__syscall_tp(evsel);
424 
425         if (sc != NULL) {
426                 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id");
427                 if (syscall_id == NULL)
428                         syscall_id = perf_evsel__field(tp, "__syscall_nr");
429                 if (syscall_id == NULL ||
430                     __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
431                         return -EINVAL;
432 
433                 return 0;
434         }
435 
436         return -ENOMEM;
437 }
438 
439 static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
440 {
441         struct syscall_tp *sc = __evsel__syscall_tp(evsel);
442 
443         return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
444 }
445 
446 static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
447 {
448         struct syscall_tp *sc = __evsel__syscall_tp(evsel);
449 
450         return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
451 }
452 
453 static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
454 {
455         if (evsel__syscall_tp(evsel) != NULL) {
456                 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
457                         return -ENOENT;
458 
459                 evsel->handler = handler;
460                 return 0;
461         }
462 
463         return -ENOMEM;
464 }
465 
466 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
467 {
468         struct evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
469 
470         /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
471         if (IS_ERR(evsel))
472                 evsel = perf_evsel__newtp("syscalls", direction);
473 
474         if (IS_ERR(evsel))
475                 return NULL;
476 
477         if (perf_evsel__init_raw_syscall_tp(evsel, handler))
478                 goto out_delete;
479 
480         return evsel;
481 
482 out_delete:
483         evsel__delete_priv(evsel);
484         return NULL;
485 }
486 
487 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
488         ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
489            fields->name.integer(&fields->name, sample); })
490 
491 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
492         ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
493            fields->name.pointer(&fields->name, sample); })
494 
495 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
496 {
497         int idx = val - sa->offset;
498 
499         if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
500                 size_t printed = scnprintf(bf, size, intfmt, val);
501                 if (show_suffix)
502                         printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
503                 return printed;
504         }
505 
506         return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
507 }
508 
509 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
510 {
511         int idx = val - sa->offset;
512 
513         if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
514                 size_t printed = scnprintf(bf, size, intfmt, val);
515                 if (show_prefix)
516                         printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
517                 return printed;
518         }
519 
520         return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
521 }
522 
523 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
524                                                 const char *intfmt,
525                                                 struct syscall_arg *arg)
526 {
527         return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
528 }
529 
530 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
531                                               struct syscall_arg *arg)
532 {
533         return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
534 }
535 
536 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
537 
538 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
539 {
540         return strarray__strtoul(arg->parm, bf, size, ret);
541 }
542 
543 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
544 {
545         return strarray__strtoul_flags(arg->parm, bf, size, ret);
546 }
547 
548 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
549 {
550         return strarrays__strtoul(arg->parm, bf, size, ret);
551 }
552 
553 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
554 {
555         return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
556 }
557 
558 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
559 {
560         size_t printed;
561         int i;
562 
563         for (i = 0; i < sas->nr_entries; ++i) {
564                 struct strarray *sa = sas->entries[i];
565                 int idx = val - sa->offset;
566 
567                 if (idx >= 0 && idx < sa->nr_entries) {
568                         if (sa->entries[idx] == NULL)
569                                 break;
570                         return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
571                 }
572         }
573 
574         printed = scnprintf(bf, size, intfmt, val);
575         if (show_prefix)
576                 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
577         return printed;
578 }
579 
580 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
581 {
582         int i;
583 
584         for (i = 0; i < sa->nr_entries; ++i) {
585                 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
586                         *ret = sa->offset + i;
587                         return true;
588                 }
589         }
590 
591         return false;
592 }
593 
594 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
595 {
596         u64 val = 0;
597         char *tok = bf, *sep, *end;
598 
599         *ret = 0;
600 
601         while (size != 0) {
602                 int toklen = size;
603 
604                 sep = memchr(tok, '|', size);
605                 if (sep != NULL) {
606                         size -= sep - tok + 1;
607 
608                         end = sep - 1;
609                         while (end > tok && isspace(*end))
610                                 --end;
611 
612                         toklen = end - tok + 1;
613                 }
614 
615                 while (isspace(*tok))
616                         ++tok;
617 
618                 if (isalpha(*tok) || *tok == '_') {
619                         if (!strarray__strtoul(sa, tok, toklen, &val))
620                                 return false;
621                 } else {
622                         bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X');
623 
624                         val = strtoul(tok, NULL, is_hexa ? 16 : 0);
625                 }
626 
627                 *ret |= (1 << (val - 1));
628 
629                 if (sep == NULL)
630                         break;
631                 tok = sep + 1;
632         }
633 
634         return true;
635 }
636 
637 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
638 {
639         int i;
640 
641         for (i = 0; i < sas->nr_entries; ++i) {
642                 struct strarray *sa = sas->entries[i];
643 
644                 if (strarray__strtoul(sa, bf, size, ret))
645                         return true;
646         }
647 
648         return false;
649 }
650 
651 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
652                                         struct syscall_arg *arg)
653 {
654         return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
655 }
656 
657 #ifndef AT_FDCWD
658 #define AT_FDCWD        -100
659 #endif
660 
661 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
662                                            struct syscall_arg *arg)
663 {
664         int fd = arg->val;
665         const char *prefix = "AT_FD";
666 
667         if (fd == AT_FDCWD)
668                 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
669 
670         return syscall_arg__scnprintf_fd(bf, size, arg);
671 }
672 
673 #define SCA_FDAT syscall_arg__scnprintf_fd_at
674 
675 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
676                                               struct syscall_arg *arg);
677 
678 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
679 
680 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
681 {
682         return scnprintf(bf, size, "%#lx", arg->val);
683 }
684 
685 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
686 {
687         if (arg->val == 0)
688                 return scnprintf(bf, size, "NULL");
689         return syscall_arg__scnprintf_hex(bf, size, arg);
690 }
691 
692 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
693 {
694         return scnprintf(bf, size, "%d", arg->val);
695 }
696 
697 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
698 {
699         return scnprintf(bf, size, "%ld", arg->val);
700 }
701 
702 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
703 {
704         // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
705         //     fill missing comms using thread__set_comm()...
706         //     here or in a special syscall_arg__scnprintf_pid_sched_tp...
707         return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
708 }
709 
710 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
711 
712 static const char *bpf_cmd[] = {
713         "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
714         "MAP_GET_NEXT_KEY", "PROG_LOAD",
715 };
716 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
717 
718 static const char *fsmount_flags[] = {
719         [1] = "CLOEXEC",
720 };
721 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
722 
723 #include "trace/beauty/generated/fsconfig_arrays.c"
724 
725 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
726 
727 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
728 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
729 
730 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
731 static DEFINE_STRARRAY(itimers, "ITIMER_");
732 
733 static const char *keyctl_options[] = {
734         "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
735         "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
736         "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
737         "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
738         "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
739 };
740 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
741 
742 static const char *whences[] = { "SET", "CUR", "END",
743 #ifdef SEEK_DATA
744 "DATA",
745 #endif
746 #ifdef SEEK_HOLE
747 "HOLE",
748 #endif
749 };
750 static DEFINE_STRARRAY(whences, "SEEK_");
751 
752 static const char *fcntl_cmds[] = {
753         "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
754         "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
755         "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
756         "GETOWNER_UIDS",
757 };
758 static DEFINE_STRARRAY(fcntl_cmds, "F_");
759 
760 static const char *fcntl_linux_specific_cmds[] = {
761         "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
762         "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
763         "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
764 };
765 
766 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
767 
768 static struct strarray *fcntl_cmds_arrays[] = {
769         &strarray__fcntl_cmds,
770         &strarray__fcntl_linux_specific_cmds,
771 };
772 
773 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
774 
775 static const char *rlimit_resources[] = {
776         "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
777         "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
778         "RTTIME",
779 };
780 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
781 
782 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
783 static DEFINE_STRARRAY(sighow, "SIG_");
784 
785 static const char *clockid[] = {
786         "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
787         "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
788         "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
789 };
790 static DEFINE_STRARRAY(clockid, "CLOCK_");
791 
792 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
793                                                  struct syscall_arg *arg)
794 {
795         bool show_prefix = arg->show_string_prefix;
796         const char *suffix = "_OK";
797         size_t printed = 0;
798         int mode = arg->val;
799 
800         if (mode == F_OK) /* 0 */
801                 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
802 #define P_MODE(n) \
803         if (mode & n##_OK) { \
804                 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
805                 mode &= ~n##_OK; \
806         }
807 
808         P_MODE(R);
809         P_MODE(W);
810         P_MODE(X);
811 #undef P_MODE
812 
813         if (mode)
814                 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
815 
816         return printed;
817 }
818 
819 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
820 
821 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
822                                               struct syscall_arg *arg);
823 
824 #define SCA_FILENAME syscall_arg__scnprintf_filename
825 
826 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
827                                                 struct syscall_arg *arg)
828 {
829         bool show_prefix = arg->show_string_prefix;
830         const char *prefix = "O_";
831         int printed = 0, flags = arg->val;
832 
833 #define P_FLAG(n) \
834         if (flags & O_##n) { \
835                 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
836                 flags &= ~O_##n; \
837         }
838 
839         P_FLAG(CLOEXEC);
840         P_FLAG(NONBLOCK);
841 #undef P_FLAG
842 
843         if (flags)
844                 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
845 
846         return printed;
847 }
848 
849 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
850 
851 #ifndef GRND_NONBLOCK
852 #define GRND_NONBLOCK   0x0001
853 #endif
854 #ifndef GRND_RANDOM
855 #define GRND_RANDOM     0x0002
856 #endif
857 
858 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
859                                                    struct syscall_arg *arg)
860 {
861         bool show_prefix = arg->show_string_prefix;
862         const char *prefix = "GRND_";
863         int printed = 0, flags = arg->val;
864 
865 #define P_FLAG(n) \
866         if (flags & GRND_##n) { \
867                 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
868                 flags &= ~GRND_##n; \
869         }
870 
871         P_FLAG(RANDOM);
872         P_FLAG(NONBLOCK);
873 #undef P_FLAG
874 
875         if (flags)
876                 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
877 
878         return printed;
879 }
880 
881 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
882 
883 #define STRARRAY(name, array) \
884           { .scnprintf  = SCA_STRARRAY, \
885             .strtoul    = STUL_STRARRAY, \
886             .parm       = &strarray__##array, }
887 
888 #define STRARRAY_FLAGS(name, array) \
889           { .scnprintf  = SCA_STRARRAY_FLAGS, \
890             .strtoul    = STUL_STRARRAY_FLAGS, \
891             .parm       = &strarray__##array, }
892 
893 #include "trace/beauty/arch_errno_names.c"
894 #include "trace/beauty/eventfd.c"
895 #include "trace/beauty/futex_op.c"
896 #include "trace/beauty/futex_val3.c"
897 #include "trace/beauty/mmap.c"
898 #include "trace/beauty/mode_t.c"
899 #include "trace/beauty/msg_flags.c"
900 #include "trace/beauty/open_flags.c"
901 #include "trace/beauty/perf_event_open.c"
902 #include "trace/beauty/pid.c"
903 #include "trace/beauty/sched_policy.c"
904 #include "trace/beauty/seccomp.c"
905 #include "trace/beauty/signum.c"
906 #include "trace/beauty/socket_type.c"
907 #include "trace/beauty/waitid_options.c"
908 
909 static struct syscall_fmt syscall_fmts[] = {
910         { .name     = "access",
911           .arg = { [1] = { .scnprintf = SCA_ACCMODE,  /* mode */ }, }, },
912         { .name     = "arch_prctl",
913           .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
914                    [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
915         { .name     = "bind",
916           .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
917                    [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
918                    [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
919         { .name     = "bpf",
920           .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
921         { .name     = "brk",        .hexret = true,
922           .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
923         { .name     = "clock_gettime",
924           .arg = { [0] = STRARRAY(clk_id, clockid), }, },
925         { .name     = "clone",      .errpid = true, .nr_args = 5,
926           .arg = { [0] = { .name = "flags",         .scnprintf = SCA_CLONE_FLAGS, },
927                    [1] = { .name = "child_stack",   .scnprintf = SCA_HEX, },
928                    [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
929                    [3] = { .name = "child_tidptr",  .scnprintf = SCA_HEX, },
930                    [4] = { .name = "tls",           .scnprintf = SCA_HEX, }, }, },
931         { .name     = "close",
932           .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
933         { .name     = "connect",
934           .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
935                    [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
936                    [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
937         { .name     = "epoll_ctl",
938           .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
939         { .name     = "eventfd2",
940           .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
941         { .name     = "fchmodat",
942           .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
943         { .name     = "fchownat",
944           .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
945         { .name     = "fcntl",
946           .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD,  /* cmd */
947                            .strtoul   = STUL_STRARRAYS,
948                            .parm      = &strarrays__fcntl_cmds_arrays,
949                            .show_zero = true, },
950                    [2] = { .scnprintf =  SCA_FCNTL_ARG, /* arg */ }, }, },
951         { .name     = "flock",
952           .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
953         { .name     = "fsconfig",
954           .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
955         { .name     = "fsmount",
956           .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
957                    [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
958         { .name     = "fspick",
959           .arg = { [0] = { .scnprintf = SCA_FDAT,         /* dfd */ },
960                    [1] = { .scnprintf = SCA_FILENAME,     /* path */ },
961                    [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
962         { .name     = "fstat", .alias = "newfstat", },
963         { .name     = "fstatat", .alias = "newfstatat", },
964         { .name     = "futex",
965           .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
966                    [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
967         { .name     = "futimesat",
968           .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
969         { .name     = "getitimer",
970           .arg = { [0] = STRARRAY(which, itimers), }, },
971         { .name     = "getpid",     .errpid = true, },
972         { .name     = "getpgid",    .errpid = true, },
973         { .name     = "getppid",    .errpid = true, },
974         { .name     = "getrandom",
975           .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
976         { .name     = "getrlimit",
977           .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
978         { .name     = "gettid",     .errpid = true, },
979         { .name     = "ioctl",
980           .arg = {
981 #if defined(__i386__) || defined(__x86_64__)
982 /*
983  * FIXME: Make this available to all arches.
984  */
985                    [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
986                    [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
987 #else
988                    [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
989 #endif
990         { .name     = "kcmp",       .nr_args = 5,
991           .arg = { [0] = { .name = "pid1",      .scnprintf = SCA_PID, },
992                    [1] = { .name = "pid2",      .scnprintf = SCA_PID, },
993                    [2] = { .name = "type",      .scnprintf = SCA_KCMP_TYPE, },
994                    [3] = { .name = "idx1",      .scnprintf = SCA_KCMP_IDX, },
995                    [4] = { .name = "idx2",      .scnprintf = SCA_KCMP_IDX, }, }, },
996         { .name     = "keyctl",
997           .arg = { [0] = STRARRAY(option, keyctl_options), }, },
998         { .name     = "kill",
999           .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1000         { .name     = "linkat",
1001           .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1002         { .name     = "lseek",
1003           .arg = { [2] = STRARRAY(whence, whences), }, },
1004         { .name     = "lstat", .alias = "newlstat", },
1005         { .name     = "madvise",
1006           .arg = { [0] = { .scnprintf = SCA_HEX,      /* start */ },
1007                    [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1008         { .name     = "mkdirat",
1009           .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1010         { .name     = "mknodat",
1011           .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1012         { .name     = "mmap",       .hexret = true,
1013 /* The standard mmap maps to old_mmap on s390x */
1014 #if defined(__s390x__)
1015         .alias = "old_mmap",
1016 #endif
1017           .arg = { [2] = { .scnprintf = SCA_MMAP_PROT,  /* prot */ },
1018                    [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1019                            .strtoul   = STUL_STRARRAY_FLAGS,
1020                            .parm      = &strarray__mmap_flags, },
1021                    [5] = { .scnprintf = SCA_HEX,        /* offset */ }, }, },
1022         { .name     = "mount",
1023           .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1024                    [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1025                            .mask_val  = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1026         { .name     = "move_mount",
1027           .arg = { [0] = { .scnprintf = SCA_FDAT,       /* from_dfd */ },
1028                    [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1029                    [2] = { .scnprintf = SCA_FDAT,       /* to_dfd */ },
1030                    [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1031                    [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1032         { .name     = "mprotect",
1033           .arg = { [0] = { .scnprintf = SCA_HEX,        /* start */ },
1034                    [2] = { .scnprintf = SCA_MMAP_PROT,  /* prot */ }, }, },
1035         { .name     = "mq_unlink",
1036           .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1037         { .name     = "mremap",     .hexret = true,
1038           .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1039         { .name     = "name_to_handle_at",
1040           .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1041         { .name     = "newfstatat",
1042           .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1043         { .name     = "open",
1044           .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1045         { .name     = "open_by_handle_at",
1046           .arg = { [0] = { .scnprintf = SCA_FDAT,       /* dfd */ },
1047                    [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1048         { .name     = "openat",
1049           .arg = { [0] = { .scnprintf = SCA_FDAT,       /* dfd */ },
1050                    [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1051         { .name     = "perf_event_open",
1052           .arg = { [2] = { .scnprintf = SCA_INT,        /* cpu */ },
1053                    [3] = { .scnprintf = SCA_FD,         /* group_fd */ },
1054                    [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1055         { .name     = "pipe2",
1056           .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1057         { .name     = "pkey_alloc",
1058           .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS,   /* access_rights */ }, }, },
1059         { .name     = "pkey_free",
1060           .arg = { [0] = { .scnprintf = SCA_INT,        /* key */ }, }, },
1061         { .name     = "pkey_mprotect",
1062           .arg = { [0] = { .scnprintf = SCA_HEX,        /* start */ },
1063                    [2] = { .scnprintf = SCA_MMAP_PROT,  /* prot */ },
1064                    [3] = { .scnprintf = SCA_INT,        /* pkey */ }, }, },
1065         { .name     = "poll", .timeout = true, },
1066         { .name     = "ppoll", .timeout = true, },
1067         { .name     = "prctl",
1068           .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
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 */ }, }, },
1110         { .name     = "sendto",
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), }, },
1118         { .name     = "socket",
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", },
1127         { .name     = "statx",
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 */ }, }, },
1133         { .name     = "swapon",
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 */ }, }, },
1139         { .name     = "tgkill",
1140           .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1141         { .name     = "tkill",
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 */ }, }, },
1154 };
1155 
1156 static int syscall_fmt__cmp(const void *name, const void *fmtp)
1157 {
1158         const struct syscall_fmt *fmt = fmtp;
1159         return strcmp(name, fmt->name);
1160 }
1161 
1162 static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name)
1163 {
1164         return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1165 }
1166 
1167 static struct syscall_fmt *syscall_fmt__find(const char *name)
1168 {
1169         const int nmemb = ARRAY_SIZE(syscall_fmts);
1170         return __syscall_fmt__find(syscall_fmts, nmemb, name);
1171 }
1172 
1173 static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
1174 {
1175         int i;
1176 
1177         for (i = 0; i < nmemb; ++i) {
1178                 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1179                         return &fmts[i];
1180         }
1181 
1182         return NULL;
1183 }
1184 
1185 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1186 {
1187         const int nmemb = ARRAY_SIZE(syscall_fmts);
1188         return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1189 }
1190 
1191 /*
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
1196  */
1197 struct syscall {
1198         struct tep_event    *tp_format;
1199         int                 nr_args;
1200         int                 args_size;
1201         struct {
1202                 struct bpf_program *sys_enter,
1203                                    *sys_exit;
1204         }                   bpf_prog;
1205         bool                is_exit;
1206         bool                is_open;
1207         bool                nonexistent;
1208         struct tep_format_field *args;
1209         const char          *name;
1210         struct syscall_fmt  *fmt;
1211         struct syscall_arg_fmt *arg_fmt;
1212 };
1213 
1214 /*
1215  * Must match what is in the BPF program:
1216  *
1217  * tools/perf/examples/bpf/augmented_raw_syscalls.c
1218  */
1219 struct bpf_map_syscall_entry {
1220         bool    enabled;
1221         u16     string_args_len[6];
1222 };
1223 
1224 /*
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
1229  * start timestamp.
1230  */
1231 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1232 {
1233         double duration = (double)t / NSEC_PER_MSEC;
1234         size_t printed = fprintf(fp, "(");
1235 
1236         if (!calculated)
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);
1242         else
1243                 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1244         return printed + fprintf(fp, "): ");
1245 }
1246 
1247 /**
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.
1253  */
1254 struct thread_trace {
1255         u64               entry_time;
1256         bool              entry_pending;
1257         unsigned long     nr_events;
1258         unsigned long     pfmaj, pfmin;
1259         char              *entry_str;
1260         double            runtime_ms;
1261         size_t            (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1262         struct {
1263                 unsigned long ptr;
1264                 short int     entry_str_pos;
1265                 bool          pending_open;
1266                 unsigned int  namelen;
1267                 char          *name;
1268         } filename;
1269         struct {
1270                 int           max;
1271                 struct file   *table;
1272         } files;
1273 
1274         struct intlist *syscall_stats;
1275 };
1276 
1277 static struct thread_trace *thread_trace__new(void)
1278 {
1279         struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
1280 
1281         if (ttrace) {
1282                 ttrace->files.max = -1;
1283                 ttrace->syscall_stats = intlist__new(NULL);
1284         }
1285 
1286         return ttrace;
1287 }
1288 
1289 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1290 {
1291         struct thread_trace *ttrace;
1292 
1293         if (thread == NULL)
1294                 goto fail;
1295 
1296         if (thread__priv(thread) == NULL)
1297                 thread__set_priv(thread, thread_trace__new());
1298 
1299         if (thread__priv(thread) == NULL)
1300                 goto fail;
1301 
1302         ttrace = thread__priv(thread);
1303         ++ttrace->nr_events;
1304 
1305         return ttrace;
1306 fail:
1307         color_fprintf(fp, PERF_COLOR_RED,
1308                       "WARNING: not enough memory, dropping samples!\n");
1309         return NULL;
1310 }
1311 
1312 
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))
1315 {
1316         struct thread_trace *ttrace = thread__priv(arg->thread);
1317 
1318         ttrace->ret_scnprintf = ret_scnprintf;
1319 }
1320 
1321 #define TRACE_PFMAJ             (1 << 0)
1322 #define TRACE_PFMIN             (1 << 1)
1323 
1324 static const size_t trace__entry_str_size = 2048;
1325 
1326 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1327 {
1328         if (fd < 0)
1329                 return NULL;
1330 
1331         if (fd > ttrace->files.max) {
1332                 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1333 
1334                 if (nfiles == NULL)
1335                         return NULL;
1336 
1337                 if (ttrace->files.max != -1) {
1338                         memset(nfiles + ttrace->files.max + 1, 0,
1339                                (fd - ttrace->files.max) * sizeof(struct file));
1340                 } else {
1341                         memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1342                 }
1343 
1344                 ttrace->files.table = nfiles;
1345                 ttrace->files.max   = fd;
1346         }
1347 
1348         return ttrace->files.table + fd;
1349 }
1350 
1351 struct file *thread__files_entry(struct thread *thread, int fd)
1352 {
1353         return thread_trace__files_entry(thread__priv(thread), fd);
1354 }
1355 
1356 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1357 {
1358         struct thread_trace *ttrace = thread__priv(thread);
1359         struct file *file = thread_trace__files_entry(ttrace, fd);
1360 
1361         if (file != NULL) {
1362                 struct stat st;
1363                 if (stat(pathname, &st) == 0)
1364                         file->dev_maj = major(st.st_rdev);
1365                 file->pathname = strdup(pathname);
1366                 if (file->pathname)
1367                         return 0;
1368         }
1369 
1370         return -1;
1371 }
1372 
1373 static int thread__read_fd_path(struct thread *thread, int fd)
1374 {
1375         char linkname[PATH_MAX], pathname[PATH_MAX];
1376         struct stat st;
1377         int ret;
1378 
1379         if (thread->pid_ == thread->tid) {
1380                 scnprintf(linkname, sizeof(linkname),
1381                           "/proc/%d/fd/%d", thread->pid_, fd);
1382         } else {
1383                 scnprintf(linkname, sizeof(linkname),
1384                           "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1385         }
1386 
1387         if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1388                 return -1;
1389 
1390         ret = readlink(linkname, pathname, sizeof(pathname));
1391 
1392         if (ret < 0 || ret > st.st_size)
1393                 return -1;
1394 
1395         pathname[ret] = '\0';
1396         return trace__set_fd_pathname(thread, fd, pathname);
1397 }
1398 
1399 static const char *thread__fd_path(struct thread *thread, int fd,
1400                                    struct trace *trace)
1401 {
1402         struct thread_trace *ttrace = thread__priv(thread);
1403 
1404         if (ttrace == NULL || trace->fd_path_disabled)
1405                 return NULL;
1406 
1407         if (fd < 0)
1408                 return NULL;
1409 
1410         if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1411                 if (!trace->live)
1412                         return NULL;
1413                 ++trace->stats.proc_getname;
1414                 if (thread__read_fd_path(thread, fd))
1415                         return NULL;
1416         }
1417 
1418         return ttrace->files.table[fd].pathname;
1419 }
1420 
1421 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1422 {
1423         int fd = arg->val;
1424         size_t printed = scnprintf(bf, size, "%d", fd);
1425         const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1426 
1427         if (path)
1428                 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1429 
1430         return printed;
1431 }
1432 
1433 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1434 {
1435         size_t printed = scnprintf(bf, size, "%d", fd);
1436         struct thread *thread = machine__find_thread(trace->host, pid, pid);
1437 
1438         if (thread) {
1439                 const char *path = thread__fd_path(thread, fd, trace);
1440 
1441                 if (path)
1442                         printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1443 
1444                 thread__put(thread);
1445         }
1446 
1447         return printed;
1448 }
1449 
1450 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1451                                               struct syscall_arg *arg)
1452 {
1453         int fd = arg->val;
1454         size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1455         struct thread_trace *ttrace = thread__priv(arg->thread);
1456 
1457         if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1458                 zfree(&ttrace->files.table[fd].pathname);
1459 
1460         return printed;
1461 }
1462 
1463 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1464                                      unsigned long ptr)
1465 {
1466         struct thread_trace *ttrace = thread__priv(thread);
1467 
1468         ttrace->filename.ptr = ptr;
1469         ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1470 }
1471 
1472 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1473 {
1474         struct augmented_arg *augmented_arg = arg->augmented.args;
1475         size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1476         /*
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.
1479          */
1480         int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1481 
1482         arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1483         arg->augmented.size -= consumed;
1484 
1485         return printed;
1486 }
1487 
1488 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1489                                               struct syscall_arg *arg)
1490 {
1491         unsigned long ptr = arg->val;
1492 
1493         if (arg->augmented.args)
1494                 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1495 
1496         if (!arg->trace->vfs_getname)
1497                 return scnprintf(bf, size, "%#x", ptr);
1498 
1499         thread__set_filename_pos(arg->thread, bf, ptr);
1500         return 0;
1501 }
1502 
1503 static bool trace__filter_duration(struct trace *trace, double t)
1504 {
1505         return t < (trace->duration_filter * NSEC_PER_MSEC);
1506 }
1507 
1508 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1509 {
1510         double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1511 
1512         return fprintf(fp, "%10.3f ", ts);
1513 }
1514 
1515 /*
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).
1520  */
1521 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1522 {
1523         if (tstamp > 0)
1524                 return __trace__fprintf_tstamp(trace, tstamp, fp);
1525 
1526         return fprintf(fp, "         ? ");
1527 }
1528 
1529 static bool done = false;
1530 static bool interrupted = false;
1531 
1532 static void sig_handler(int sig)
1533 {
1534         done = true;
1535         interrupted = sig == SIGINT;
1536 }
1537 
1538 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1539 {
1540         size_t printed = 0;
1541 
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);
1546         }
1547 
1548         return printed;
1549 }
1550 
1551 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1552                                         u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1553 {
1554         size_t printed = 0;
1555 
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);
1561 }
1562 
1563 static int trace__process_event(struct trace *trace, struct machine *machine,
1564                                 union perf_event *event, struct perf_sample *sample)
1565 {
1566         int ret = 0;
1567 
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);
1573                 break;
1574         default:
1575                 ret = machine__process_event(machine, event, sample);
1576                 break;
1577         }
1578 
1579         return ret;
1580 }
1581 
1582 static int trace__tool_process(struct perf_tool *tool,
1583                                union perf_event *event,
1584                                struct perf_sample *sample,
1585                                struct machine *machine)
1586 {
1587         struct trace *trace = container_of(tool, struct trace, tool);
1588         return trace__process_event(trace, machine, event, sample);
1589 }
1590 
1591 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1592 {
1593         struct machine *machine = vmachine;
1594 
1595         if (machine->kptr_restrict_warned)
1596                 return NULL;
1597 
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;
1603                 return NULL;
1604         }
1605 
1606         return machine__resolve_kernel_addr(vmachine, addrp, modp);
1607 }
1608 
1609 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1610 {
1611         int err = symbol__init(NULL);
1612 
1613         if (err)
1614                 return err;
1615 
1616         trace->host = machine__new_host();
1617         if (trace->host == NULL)
1618                 return -ENOMEM;
1619 
1620         err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1621         if (err < 0)
1622                 goto out;
1623 
1624         err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1625                                             evlist->core.threads, trace__tool_process, false,
1626                                             1);
1627 out:
1628         if (err)
1629                 symbol__exit();
1630 
1631         return err;
1632 }
1633 
1634 static void trace__symbols__exit(struct trace *trace)
1635 {
1636         machine__exit(trace->host);
1637         trace->host = NULL;
1638 
1639         symbol__exit();
1640 }
1641 
1642 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1643 {
1644         int idx;
1645 
1646         if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1647                 nr_args = sc->fmt->nr_args;
1648 
1649         sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1650         if (sc->arg_fmt == NULL)
1651                 return -1;
1652 
1653         for (idx = 0; idx < nr_args; ++idx) {
1654                 if (sc->fmt)
1655                         sc->arg_fmt[idx] = sc->fmt->arg[idx];
1656         }
1657 
1658         sc->nr_args = nr_args;
1659         return 0;
1660 }
1661 
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, },
1665 };
1666 
1667 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1668 {
1669        const struct syscall_arg_fmt *fmt = fmtp;
1670        return strcmp(name, fmt->name);
1671 }
1672 
1673 static struct syscall_arg_fmt *
1674 __syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
1675 {
1676        return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1677 }
1678 
1679 static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1680 {
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);
1683 }
1684 
1685 static struct tep_format_field *
1686 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1687 {
1688         struct tep_format_field *last_field = NULL;
1689         int len;
1690 
1691         for (; field; field = field->next, ++arg) {
1692                 last_field = field;
1693 
1694                 if (arg->scnprintf)
1695                         continue;
1696 
1697                 len = strlen(field->name);
1698 
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) {
1716                         /*
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
1719                          * 65 int
1720                          * 23 unsigned int
1721                          * 7 unsigned long
1722                          */
1723                         arg->scnprintf = SCA_FD;
1724                } else {
1725                         struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
1726 
1727                         if (fmt) {
1728                                 arg->scnprintf = fmt->scnprintf;
1729                                 arg->strtoul   = fmt->strtoul;
1730                         }
1731                 }
1732         }
1733 
1734         return last_field;
1735 }
1736 
1737 static int syscall__set_arg_fmts(struct syscall *sc)
1738 {
1739         struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1740 
1741         if (last_field)
1742                 sc->args_size = last_field->offset + last_field->size;
1743 
1744         return 0;
1745 }
1746 
1747 static int trace__read_syscall_info(struct trace *trace, int id)
1748 {
1749         char tp_name[128];
1750         struct syscall *sc;
1751         const char *name = syscalltbl__name(trace->sctbl, id);
1752 
1753         if (trace->syscalls.table == NULL) {
1754                 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1755                 if (trace->syscalls.table == NULL)
1756                         return -ENOMEM;
1757         }
1758 
1759         sc = trace->syscalls.table + id;
1760         if (sc->nonexistent)
1761                 return 0;
1762 
1763         if (name == NULL) {
1764                 sc->nonexistent = true;
1765                 return 0;
1766         }
1767 
1768         sc->name = name;
1769         sc->fmt  = syscall_fmt__find(sc->name);
1770 
1771         snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1772         sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1773 
1774         if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1775                 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1776                 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1777         }
1778 
1779         if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1780                 return -ENOMEM;
1781 
1782         if (IS_ERR(sc->tp_format))
1783                 return PTR_ERR(sc->tp_format);
1784 
1785         sc->args = sc->tp_format->format.fields;
1786         /*
1787          * We need to check and discard the first variable '__syscall_nr'
1788          * or 'nr' that mean the syscall number. It is needless here.
1789          * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1790          */
1791         if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1792                 sc->args = sc->args->next;
1793                 --sc->nr_args;
1794         }
1795 
1796         sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1797         sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1798 
1799         return syscall__set_arg_fmts(sc);
1800 }
1801 
1802 static int perf_evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1803 {
1804         struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1805 
1806         if (fmt != NULL) {
1807                 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1808                 return 0;
1809         }
1810 
1811         return -ENOMEM;
1812 }
1813 
1814 static int intcmp(const void *a, const void *b)
1815 {
1816         const int *one = a, *another = b;
1817 
1818         return *one - *another;
1819 }
1820 
1821 static int trace__validate_ev_qualifier(struct trace *trace)
1822 {
1823         int err = 0;
1824         bool printed_invalid_prefix = false;
1825         struct str_node *pos;
1826         size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1827 
1828         trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1829                                                  sizeof(trace->ev_qualifier_ids.entries[0]));
1830 
1831         if (trace->ev_qualifier_ids.entries == NULL) {
1832                 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1833                        trace->output);
1834                 err = -EINVAL;
1835                 goto out;
1836         }
1837 
1838         strlist__for_each_entry(pos, trace->ev_qualifier) {
1839                 const char *sc = pos->s;
1840                 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1841 
1842                 if (id < 0) {
1843                         id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1844                         if (id >= 0)
1845                                 goto matches;
1846 
1847                         if (!printed_invalid_prefix) {
1848                                 pr_debug("Skipping unknown syscalls: ");
1849                                 printed_invalid_prefix = true;
1850                         } else {
1851                                 pr_debug(", ");
1852                         }
1853 
1854                         pr_debug("%s", sc);
1855                         continue;
1856                 }
1857 matches:
1858                 trace->ev_qualifier_ids.entries[nr_used++] = id;
1859                 if (match_next == -1)
1860                         continue;
1861 
1862                 while (1) {
1863                         id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1864                         if (id < 0)
1865                                 break;
1866                         if (nr_allocated == nr_used) {
1867                                 void *entries;
1868 
1869                                 nr_allocated += 8;
1870                                 entries = realloc(trace->ev_qualifier_ids.entries,
1871                                                   nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1872                                 if (entries == NULL) {
1873                                         err = -ENOMEM;
1874                                         fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1875                                         goto out_free;
1876                                 }
1877                                 trace->ev_qualifier_ids.entries = entries;
1878                         }
1879                         trace->ev_qualifier_ids.entries[nr_used++] = id;
1880                 }
1881         }
1882 
1883         trace->ev_qualifier_ids.nr = nr_used;
1884         qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1885 out:
1886         if (printed_invalid_prefix)
1887                 pr_debug("\n");
1888         return err;
1889 out_free:
1890         zfree(&trace->ev_qualifier_ids.entries);
1891         trace->ev_qualifier_ids.nr = 0;
1892         goto out;
1893 }
1894 
1895 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1896 {
1897         bool in_ev_qualifier;
1898 
1899         if (trace->ev_qualifier_ids.nr == 0)
1900                 return true;
1901 
1902         in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1903                                   trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1904 
1905         if (in_ev_qualifier)
1906                return !trace->not_ev_qualifier;
1907 
1908         return trace->not_ev_qualifier;
1909 }
1910 
1911 /*
1912  * args is to be interpreted as a series of longs but we need to handle
1913  * 8-byte unaligned accesses. args points to raw_data within the event
1914  * and raw_data is guaranteed to be 8-byte unaligned because it is
1915  * preceded by raw_size which is a u32. So we need to copy args to a temp
1916  * variable to read it. Most notably this avoids extended load instructions
1917  * on unaligned addresses
1918  */
1919 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1920 {
1921         unsigned long val;
1922         unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1923 
1924         memcpy(&val, p, sizeof(val));
1925         return val;
1926 }
1927 
1928 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1929                                       struct syscall_arg *arg)
1930 {
1931         if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1932                 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1933 
1934         return scnprintf(bf, size, "arg%d: ", arg->idx);
1935 }
1936 
1937 /*
1938  * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1939  * as mount 'flags' argument that needs ignoring some magic flag, see comment
1940  * in tools/perf/trace/beauty/mount_flags.c
1941  */
1942 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1943 {
1944         if (fmt && fmt->mask_val)
1945                 return fmt->mask_val(arg, val);
1946 
1947         return val;
1948 }
1949 
1950 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1951                                              struct syscall_arg *arg, unsigned long val)
1952 {
1953         if (fmt && fmt->scnprintf) {
1954                 arg->val = val;
1955                 if (fmt->parm)
1956                         arg->parm = fmt->parm;
1957                 return fmt->scnprintf(bf, size, arg);
1958         }
1959         return scnprintf(bf, size, "%ld", val);
1960 }
1961 
1962 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1963                                       unsigned char *args, void *augmented_args, int augmented_args_size,
1964                                       struct trace *trace, struct thread *thread)
1965 {
1966         size_t printed = 0;
1967         unsigned long val;
1968         u8 bit = 1;
1969         struct syscall_arg arg = {
1970                 .args   = args,
1971                 .augmented = {
1972                         .size = augmented_args_size,
1973                         .args = augmented_args,
1974                 },
1975                 .idx    = 0,
1976                 .mask   = 0,
1977                 .trace  = trace,
1978                 .thread = thread,
1979                 .show_string_prefix = trace->show_string_prefix,
1980         };
1981         struct thread_trace *ttrace = thread__priv(thread);
1982 
1983         /*
1984          * Things like fcntl will set this in its 'cmd' formatter to pick the
1985          * right formatter for the return value (an fd? file flags?), which is
1986          * not needed for syscalls that always return a given type, say an fd.
1987          */
1988         ttrace->ret_scnprintf = NULL;
1989 
1990         if (sc->args != NULL) {
1991                 struct tep_format_field *field;
1992 
1993                 for (field = sc->args; field;
1994                      field = field->next, ++arg.idx, bit <<= 1) {
1995                         if (arg.mask & bit)
1996                                 continue;
1997 
1998                         arg.fmt = &sc->arg_fmt[arg.idx];
1999                         val = syscall_arg__val(&arg, arg.idx);
2000                         /*
2001                          * Some syscall args need some mask, most don't and
2002                          * return val untouched.
2003                          */
2004                         val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2005 
2006                         /*
2007                          * Suppress this argument if its value is zero and
2008                          * and we don't have a string associated in an
2009                          * strarray for it.
2010                          */
2011                         if (val == 0 &&
2012                             !trace->show_zeros &&
2013                             !(sc->arg_fmt &&
2014                               (sc->arg_fmt[arg.idx].show_zero ||
2015                                sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2016                                sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2017                               sc->arg_fmt[arg.idx].parm))
2018                                 continue;
2019 
2020                         printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2021 
2022                         if (trace->show_arg_names)
2023                                 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2024 
2025                         printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2026                                                                   bf + printed, size - printed, &arg, val);
2027                 }
2028         } else if (IS_ERR(sc->tp_format)) {
2029                 /*
2030                  * If we managed to read the tracepoint /format file, then we
2031                  * may end up not having any args, like with gettid(), so only
2032                  * print the raw args when we didn't manage to read it.
2033                  */
2034                 while (arg.idx < sc->nr_args) {
2035                         if (arg.mask & bit)
2036                                 goto next_arg;
2037                         val = syscall_arg__val(&arg, arg.idx);
2038                         if (printed)
2039                                 printed += scnprintf(bf + printed, size - printed, ", ");
2040                         printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2041                         printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2042 next_arg:
2043                         ++arg.idx;
2044                         bit <<= 1;
2045                 }
2046         }
2047 
2048         return printed;
2049 }
2050 
2051 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2052                                   union perf_event *event,
2053                                   struct perf_sample *sample);
2054 
2055 static struct syscall *trace__syscall_info(struct trace *trace,
2056                                            struct evsel *evsel, int id)
2057 {
2058         int err = 0;
2059 
2060         if (id < 0) {
2061 
2062                 /*
2063                  * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2064                  * before that, leaving at a higher verbosity level till that is
2065                  * explained. Reproduced with plain ftrace with:
2066                  *
2067                  * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2068                  * grep "NR -1 " /t/trace_pipe
2069                  *
2070                  * After generating some load on the machine.
2071                  */
2072                 if (verbose > 1) {
2073                         static u64 n;
2074                         fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2075                                 id, perf_evsel__name(evsel), ++n);
2076                 }
2077                 return NULL;
2078         }
2079 
2080         err = -EINVAL;
2081 
2082         if (id > trace->sctbl->syscalls.max_id)
2083                 goto out_cant_read;
2084 
2085         if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2086             (err = trace__read_syscall_info(trace, id)) != 0)
2087                 goto out_cant_read;
2088 
2089         if (trace->syscalls.table[id].name == NULL) {
2090                 if (trace->syscalls.table[id].nonexistent)
2091                         return NULL;
2092                 goto out_cant_read;
2093         }
2094 
2095         return &trace->syscalls.table[id];
2096 
2097 out_cant_read:
2098         if (verbose > 0) {
2099                 char sbuf[STRERR_BUFSIZE];
2100                 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2101                 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2102                         fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2103                 fputs(" information\n", trace->output);
2104         }
2105         return NULL;
2106 }
2107 
2108 struct syscall_stats {
2109         struct stats stats;
2110         u64          nr_failures;
2111         int          max_errno;
2112         u32          *errnos;
2113 };
2114 
2115 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2116                                  int id, struct perf_sample *sample, long err, bool errno_summary)
2117 {
2118         struct int_node *inode;
2119         struct syscall_stats *stats;
2120         u64 duration = 0;
2121 
2122         inode = intlist__findnew(ttrace->syscall_stats, id);
2123         if (inode == NULL)
2124                 return;
2125 
2126         stats = inode->priv;
2127         if (stats == NULL) {
2128                 stats = malloc(sizeof(*stats));
2129                 if (stats == NULL)
2130                         return;
2131 
2132                 stats->nr_failures = 0;
2133                 stats->max_errno   = 0;
2134                 stats->errnos      = NULL;
2135                 init_stats(&stats->stats);
2136                 inode->priv = stats;
2137         }
2138 
2139         if (ttrace->entry_time && sample->time > ttrace->entry_time)
2140                 duration = sample->time - ttrace->entry_time;
2141 
2142         update_stats(&stats->stats, duration);
2143 
2144         if (err < 0) {
2145                 ++stats->nr_failures;
2146 
2147                 if (!errno_summary)
2148                         return;
2149 
2150                 err = -err;
2151                 if (err > stats->max_errno) {
2152                         u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2153 
2154                         if (new_errnos) {
2155                                 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2156                         } else {
2157                                 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2158                                          thread__comm_str(thread), thread->pid_, thread->tid);
2159                                 return;
2160                         }
2161 
2162                         stats->errnos = new_errnos;
2163                         stats->max_errno = err;
2164                 }
2165 
2166                 ++stats->errnos[err - 1];
2167         }
2168 }
2169 
2170 static int trace__printf_interrupted_entry(struct trace *trace)
2171 {
2172         struct thread_trace *ttrace;
2173         size_t printed;
2174         int len;
2175 
2176         if (trace->failure_only || trace->current == NULL)
2177                 return 0;
2178 
2179         ttrace = thread__priv(trace->current);
2180 
2181         if (!ttrace->entry_pending)
2182                 return 0;
2183 
2184         printed  = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2185         printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2186 
2187         if (len < trace->args_alignment - 4)
2188                 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2189 
2190         printed += fprintf(trace->output, " ...\n");
2191 
2192         ttrace->entry_pending = false;
2193         ++trace->nr_events_printed;
2194 
2195         return printed;
2196 }
2197 
2198 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2199                                  struct perf_sample *sample, struct thread *thread)
2200 {
2201         int printed = 0;
2202 
2203         if (trace->print_sample) {
2204                 double ts = (double)sample->time / NSEC_PER_MSEC;
2205 
2206                 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2207                                    perf_evsel__name(evsel), ts,
2208                                    thread__comm_str(thread),
2209                                    sample->pid, sample->tid, sample->cpu);
2210         }
2211 
2212         return printed;
2213 }
2214 
2215 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2216 {
2217         void *augmented_args = NULL;
2218         /*
2219          * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2220          * and there we get all 6 syscall args plus the tracepoint common fields
2221          * that gets calculated at the start and the syscall_nr (another long).
2222          * So we check if that is the case and if so don't look after the
2223          * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2224          * which is fixed.
2225          *
2226          * We'll revisit this later to pass s->args_size to the BPF augmenter
2227          * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2228          * copies only what we need for each syscall, like what happens when we
2229          * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2230          * traffic to just what is needed for each syscall.
2231          */
2232         int args_size = raw_augmented_args_size ?: sc->args_size;
2233 
2234         *augmented_args_size = sample->raw_size - args_size;
2235         if (*augmented_args_size > 0)
2236                 augmented_args = sample->raw_data + args_size;
2237 
2238         return augmented_args;
2239 }
2240 
2241 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2242                             union perf_event *event __maybe_unused,
2243                             struct perf_sample *sample)
2244 {
2245         char *msg;
2246         void *args;
2247         int printed = 0;
2248         struct thread *thread;
2249         int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2250         int augmented_args_size = 0;
2251         void *augmented_args = NULL;
2252         struct syscall *sc = trace__syscall_info(trace, evsel, id);
2253         struct thread_trace *ttrace;
2254 
2255         if (sc == NULL)
2256                 return -1;
2257 
2258         thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2259         ttrace = thread__trace(thread, trace->output);
2260         if (ttrace == NULL)
2261                 goto out_put;
2262 
2263         trace__fprintf_sample(trace, evsel, sample, thread);
2264 
2265         args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2266 
2267         if (ttrace->entry_str == NULL) {
2268                 ttrace->entry_str = malloc(trace__entry_str_size);
2269                 if (!ttrace->entry_str)
2270                         goto out_put;
2271         }
2272 
2273         if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2274                 trace__printf_interrupted_entry(trace);
2275         /*
2276          * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2277          * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2278          * this breaks syscall__augmented_args() check for augmented args, as we calculate
2279          * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2280          * so when handling, say the openat syscall, we end up getting 6 args for the
2281          * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2282          * thinking that the extra 2 u64 args are the augmented filename, so just check
2283          * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2284          */
2285         if (evsel != trace->syscalls.events.sys_enter)
2286                 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2287         ttrace->entry_time = sample->time;
2288         msg = ttrace->entry_str;
2289         printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2290 
2291         printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2292                                            args, augmented_args, augmented_args_size, trace, thread);
2293 
2294         if (sc->is_exit) {
2295                 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2296                         int alignment = 0;
2297 
2298                         trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2299                         printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2300                         if (trace->args_alignment > printed)
2301                                 alignment = trace->args_alignment - printed;
2302                         fprintf(trace->output, "%*s= ?\n", alignment, " ");
2303                 }
2304         } else {
2305                 ttrace->entry_pending = true;
2306                 /* See trace__vfs_getname & trace__sys_exit */
2307                 ttrace->filename.pending_open = false;
2308         }
2309 
2310         if (trace->current != thread) {
2311                 thread__put(trace->current);
2312                 trace->current = thread__get(thread);
2313         }
2314         err = 0;
2315 out_put:
2316         thread__put(thread);
2317         return err;
2318 }
2319 
2320 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2321                                     struct perf_sample *sample)
2322 {
2323         struct thread_trace *ttrace;
2324         struct thread *thread;
2325         int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2326         struct syscall *sc = trace__syscall_info(trace, evsel, id);
2327         char msg[1024];
2328         void *args, *augmented_args = NULL;
2329         int augmented_args_size;
2330 
2331         if (sc == NULL)
2332                 return -1;
2333 
2334         thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2335         ttrace = thread__trace(thread, trace->output);
2336         /*
2337          * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2338          * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2339          */
2340         if (ttrace == NULL)
2341                 goto out_put;
2342 
2343         args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2344         augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2345         syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2346         fprintf(trace->output, "%s", msg);
2347         err = 0;
2348 out_put:
2349         thread__put(thread);
2350         return err;
2351 }
2352 
2353 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2354                                     struct perf_sample *sample,
2355                                     struct callchain_cursor *cursor)
2356 {
2357         struct addr_location al;
2358         int max_stack = evsel->core.attr.sample_max_stack ?
2359                         evsel->core.attr.sample_max_stack :
2360                         trace->max_stack;
2361         int err;
2362 
2363         if (machine__resolve(trace->host, &al, sample) < 0)
2364                 return -1;
2365 
2366         err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2367         addr_location__put(&al);
2368         return err;
2369 }
2370 
2371 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2372 {
2373         /* TODO: user-configurable print_opts */
2374         const unsigned int print_opts = EVSEL__PRINT_SYM |
2375                                         EVSEL__PRINT_DSO |
2376                                         EVSEL__PRINT_UNKNOWN_AS_ADDR;
2377 
2378         return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2379 }
2380 
2381 static const char *errno_to_name(struct evsel *evsel, int err)
2382 {
2383         struct perf_env *env = perf_evsel__env(evsel);
2384         const char *arch_name = perf_env__arch(env);
2385 
2386         return arch_syscalls__strerrno(arch_name, err);
2387 }
2388 
2389 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2390                            union perf_event *event __maybe_unused,
2391                            struct perf_sample *sample)
2392 {
2393         long ret;
2394         u64 duration = 0;
2395         bool duration_calculated = false;
2396         struct thread *thread;
2397         int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2398         int alignment = trace->args_alignment;
2399         struct syscall *sc = trace__syscall_info(trace, evsel, id);
2400         struct thread_trace *ttrace;
2401 
2402         if (sc == NULL)
2403                 return -1;
2404 
2405         thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2406         ttrace = thread__trace(thread, trace->output);
2407         if (ttrace == NULL)
2408                 goto out_put;
2409 
2410         trace__fprintf_sample(trace, evsel, sample, thread);
2411 
2412         ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2413 
2414         if (trace->summary)
2415                 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2416 
2417         if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2418                 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2419                 ttrace->filename.pending_open = false;
2420                 ++trace->stats.vfs_getname;
2421         }
2422 
2423         if (ttrace->entry_time) {
2424                 duration = sample->time - ttrace->entry_time;
2425                 if (trace__filter_duration(trace, duration))
2426                         goto out;
2427                 duration_calculated = true;
2428         } else if (trace->duration_filter)
2429                 goto out;
2430 
2431         if (sample->callchain) {
2432                 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2433                 if (callchain_ret == 0) {
2434                         if (callchain_cursor.nr < trace->min_stack)
2435                                 goto out;
2436                         callchain_ret = 1;
2437                 }
2438         }
2439 
2440         if (trace->summary_only || (ret >= 0 && trace->failure_only))
2441                 goto out;
2442 
2443         trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2444 
2445         if (ttrace->entry_pending) {
2446                 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2447         } else {
2448                 printed += fprintf(trace->output, " ... [");
2449                 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2450                 printed += 9;
2451                 printed += fprintf(trace->output, "]: %s()", sc->name);
2452         }
2453 
2454         printed++; /* the closing ')' */
2455 
2456         if (alignment > printed)
2457                 alignment -= printed;
2458         else
2459                 alignment = 0;
2460 
2461         fprintf(trace->output, ")%*s= ", alignment, " ");
2462 
2463         if (sc->fmt == NULL) {
2464                 if (ret < 0)
2465                         goto errno_print;
2466 signed_print:
2467                 fprintf(trace->output, "%ld", ret);
2468         } else if (ret < 0) {
2469 errno_print: {
2470                 char bf[STRERR_BUFSIZE];
2471                 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2472                            *e = errno_to_name(evsel, -ret);
2473 
2474                 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2475         }
2476         } else if (ret == 0 && sc->fmt->timeout)
2477                 fprintf(trace->output, "0 (Timeout)");
2478         else if (ttrace->ret_scnprintf) {
2479                 char bf[1024];
2480                 struct syscall_arg arg = {
2481                         .val    = ret,
2482                         .thread = thread,
2483                         .trace  = trace,
2484                 };
2485                 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2486                 ttrace->ret_scnprintf = NULL;
2487                 fprintf(trace->output, "%s", bf);
2488         } else if (sc->fmt->hexret)
2489                 fprintf(trace->output, "%#lx", ret);
2490         else if (sc->fmt->errpid) {
2491                 struct thread *child = machine__find_thread(trace->host, ret, ret);
2492 
2493                 if (child != NULL) {
2494                         fprintf(trace->output, "%ld", ret);
2495                         if (child->comm_set)
2496                                 fprintf(trace->output, " (%s)", thread__comm_str(child));
2497                         thread__put(child);
2498                 }
2499         } else
2500                 goto signed_print;
2501 
2502         fputc('\n', trace->output);
2503 
2504         /*
2505          * We only consider an 'event' for the sake of --max-events a non-filtered
2506          * sys_enter + sys_exit and other tracepoint events.
2507          */
2508         if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2509                 interrupted = true;
2510 
2511         if (callchain_ret > 0)
2512                 trace__fprintf_callchain(trace, sample);
2513         else if (callchain_ret < 0)
2514                 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2515 out:
2516         ttrace->entry_pending = false;
2517         err = 0;
2518 out_put:
2519         thread__put(thread);
2520         return err;
2521 }
2522 
2523 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2524                               union perf_event *event __maybe_unused,
2525                               struct perf_sample *sample)
2526 {
2527         struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2528         struct thread_trace *ttrace;
2529         size_t filename_len, entry_str_len, to_move;
2530         ssize_t remaining_space;
2531         char *pos;
2532         const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
2533 
2534         if (!thread)
2535                 goto out;
2536 
2537         ttrace = thread__priv(thread);
2538         if (!ttrace)
2539                 goto out_put;
2540 
2541         filename_len = strlen(filename);
2542         if (filename_len == 0)
2543                 goto out_put;
2544 
2545         if (ttrace->filename.namelen < filename_len) {
2546                 char *f = realloc(ttrace->filename.name, filename_len + 1);
2547 
2548                 if (f == NULL)
2549                         goto out_put;
2550 
2551                 ttrace->filename.namelen = filename_len;
2552                 ttrace->filename.name = f;
2553         }
2554 
2555         strcpy(ttrace->filename.name, filename);
2556         ttrace->filename.pending_open = true;
2557 
2558         if (!ttrace->filename.ptr)
2559                 goto out_put;
2560 
2561         entry_str_len = strlen(ttrace->entry_str);
2562         remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2563         if (remaining_space <= 0)
2564                 goto out_put;
2565 
2566         if (filename_len > (size_t)remaining_space) {
2567                 filename += filename_len - remaining_space;
2568                 filename_len = remaining_space;
2569         }
2570 
2571         to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2572         pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2573         memmove(pos + filename_len, pos, to_move);
2574         memcpy(pos, filename, filename_len);
2575 
2576         ttrace->filename.ptr = 0;
2577         ttrace->filename.entry_str_pos = 0;
2578 out_put:
2579         thread__put(thread);
2580 out:
2581         return 0;
2582 }
2583 
2584 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2585                                      union perf_event *event __maybe_unused,
2586                                      struct perf_sample *sample)
2587 {
2588         u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
2589         double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2590         struct thread *thread = machine__findnew_thread(trace->host,
2591                                                         sample->pid,
2592                                                         sample->tid);
2593         struct thread_trace *ttrace = thread__trace(thread, trace->output);
2594 
2595         if (ttrace == NULL)
2596                 goto out_dump;
2597 
2598         ttrace->runtime_ms += runtime_ms;
2599         trace->runtime_ms += runtime_ms;
2600 out_put:
2601         thread__put(thread);
2602         return 0;
2603 
2604 out_dump:
2605         fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2606                evsel->name,
2607                perf_evsel__strval(evsel, sample, "comm"),
2608                (pid_t)perf_evsel__intval(evsel, sample, "pid"),
2609                runtime,
2610                perf_evsel__intval(evsel, sample, "vruntime"));
2611         goto out_put;
2612 }
2613 
2614 static int bpf_output__printer(enum binary_printer_ops op,
2615                                unsigned int val, void *extra __maybe_unused, FILE *fp)
2616 {
2617         unsigned char ch = (unsigned char)val;
2618 
2619         switch (op) {
2620         case BINARY_PRINT_CHAR_DATA:
2621                 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2622         case BINARY_PRINT_DATA_BEGIN:
2623         case BINARY_PRINT_LINE_BEGIN:
2624         case BINARY_PRINT_ADDR:
2625         case BINARY_PRINT_NUM_DATA:
2626         case BINARY_PRINT_NUM_PAD:
2627         case BINARY_PRINT_SEP:
2628         case BINARY_PRINT_CHAR_PAD:
2629         case BINARY_PRINT_LINE_END:
2630         case BINARY_PRINT_DATA_END:
2631         default:
2632                 break;
2633         }
2634 
2635         return 0;
2636 }
2637 
2638 static void bpf_output__fprintf(struct trace *trace,
2639                                 struct perf_sample *sample)
2640 {
2641         binary__fprintf(sample->raw_data, sample->raw_size, 8,
2642                         bpf_output__printer, NULL, trace->output);
2643         ++trace->nr_events_printed;
2644 }
2645 
2646 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2647                                        struct thread *thread, void *augmented_args, int augmented_args_size)
2648 {
2649         char bf[2048];
2650         size_t size = sizeof(bf);
2651         struct tep_format_field *field = evsel->tp_format->format.fields;
2652         struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2653         size_t printed = 0;
2654         unsigned long val;
2655         u8 bit = 1;
2656         struct syscall_arg syscall_arg = {
2657                 .augmented = {
2658                         .size = augmented_args_size,
2659                         .args = augmented_args,
2660                 },
2661                 .idx    = 0,
2662                 .mask   = 0,
2663                 .trace  = trace,
2664                 .thread = thread,
2665                 .show_string_prefix = trace->show_string_prefix,
2666         };
2667 
2668         for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2669                 if (syscall_arg.mask & bit)
2670                         continue;
2671 
2672                 syscall_arg.len = 0;
2673                 syscall_arg.fmt = arg;
2674                 if (field->flags & TEP_FIELD_IS_ARRAY) {
2675                         int offset = field->offset;
2676 
2677                         if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2678                                 offset = format_field__intval(field, sample, evsel->needs_swap);
2679                                 syscall_arg.len = offset >> 16;
2680                                 offset &= 0xffff;
2681                         }
2682 
2683                         val = (uintptr_t)(sample->raw_data + offset);
2684                 } else
2685                         val = format_field__intval(field, sample, evsel->needs_swap);
2686                 /*
2687                  * Some syscall args need some mask, most don't and
2688                  * return val untouched.
2689                  */
2690                 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2691 
2692                 /*
2693                  * Suppress this argument if its value is zero and
2694                  * and we don't have a string associated in an
2695                  * strarray for it.
2696                  */
2697                 if (val == 0 &&
2698                     !trace->show_zeros &&
2699                     !((arg->show_zero ||
2700                        arg->scnprintf == SCA_STRARRAY ||
2701                        arg->scnprintf == SCA_STRARRAYS) &&
2702                       arg->parm))
2703                         continue;
2704 
2705                 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2706 
2707                 /*
2708                  * XXX Perhaps we should have a show_tp_arg_names,
2709                  * leaving show_arg_names just for syscalls?
2710                  */
2711                 if (1 || trace->show_arg_names)
2712                         printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2713 
2714                 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2715         }
2716 
2717         return printed + fprintf(trace->output, "%s", bf);
2718 }
2719 
2720 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2721                                 union perf_event *event __maybe_unused,
2722                                 struct perf_sample *sample)
2723 {
2724         struct thread *thread;
2725         int callchain_ret = 0;
2726         /*
2727          * Check if we called perf_evsel__disable(evsel) due to, for instance,
2728          * this event's max_events having been hit and this is an entry coming
2729          * from the ring buffer that we should discard, since the max events
2730          * have already been considered/printed.
2731          */
2732         if (evsel->disabled)
2733                 return 0;
2734 
2735         thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2736 
2737         if (sample->callchain) {
2738                 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2739                 if (callchain_ret == 0) {
2740                         if (callchain_cursor.nr < trace->min_stack)
2741                                 goto out;
2742                         callchain_ret = 1;
2743                 }
2744         }
2745 
2746         trace__printf_interrupted_entry(trace);
2747         trace__fprintf_tstamp(trace, sample->time, trace->output);
2748 
2749         if (trace->trace_syscalls && trace->show_duration)
2750                 fprintf(trace->output, "(         ): ");
2751 
2752         if (thread)
2753                 trace__fprintf_comm_tid(trace, thread, trace->output);
2754 
2755         if (evsel == trace->syscalls.events.augmented) {
2756                 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2757                 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2758 
2759                 if (sc) {
2760                         fprintf(trace->output, "%s(", sc->name);
2761                         trace__fprintf_sys_enter(trace, evsel, sample);
2762                         fputc(')', trace->output);
2763                         goto newline;
2764                 }
2765 
2766                 /*
2767                  * XXX: Not having the associated syscall info or not finding/adding
2768                  *      the thread should never happen, but if it does...
2769                  *      fall thru and print it as a bpf_output event.
2770                  */
2771         }
2772 
2773         fprintf(trace->output, "%s(", evsel->name);
2774 
2775         if (perf_evsel__is_bpf_output(evsel)) {
2776                 bpf_output__fprintf(trace, sample);
2777         } else if (evsel->tp_format) {
2778                 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2779                     trace__fprintf_sys_enter(trace, evsel, sample)) {
2780                         if (trace->libtraceevent_print) {
2781                                 event_format__fprintf(evsel->tp_format, sample->cpu,
2782                                                       sample->raw_data, sample->raw_size,
2783                                                       trace->output);
2784                         } else {
2785                                 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2786                         }
2787                 }
2788         }
2789 
2790 newline:
2791         fprintf(trace->output, ")\n");
2792 
2793         if (callchain_ret > 0)
2794                 trace__fprintf_callchain(trace, sample);
2795         else if (callchain_ret < 0)
2796                 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2797 
2798         ++trace->nr_events_printed;
2799 
2800         if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2801                 evsel__disable(evsel);
2802                 evsel__close(evsel);
2803         }
2804 out:
2805         thread__put(thread);
2806         return 0;
2807 }
2808 
2809 static void print_location(FILE *f, struct perf_sample *sample,
2810                            struct addr_location *al,
2811                            bool print_dso, bool print_sym)
2812 {
2813 
2814         if ((verbose > 0 || print_dso) && al->map)
2815                 fprintf(f, "%s@", al->map->dso->long_name);
2816 
2817         if ((verbose > 0 || print_sym) && al->sym)
2818                 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2819                         al->addr - al->sym->start);
2820         else if (al->map)
2821                 fprintf(f, "0x%" PRIx64, al->addr);
2822         else
2823                 fprintf(f, "0x%" PRIx64, sample->addr);
2824 }
2825 
2826 static int trace__pgfault(struct trace *trace,
2827                           struct evsel *evsel,
2828                           union perf_event *event __maybe_unused,
2829                           struct perf_sample *sample)
2830 {
2831         struct thread *thread;
2832         struct addr_location al;
2833         char map_type = 'd';
2834         struct thread_trace *ttrace;
2835         int err = -1;
2836         int callchain_ret = 0;
2837 
2838         thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2839 
2840         if (sample->callchain) {
2841                 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2842                 if (callchain_ret == 0) {
2843                         if (callchain_cursor.nr < trace->min_stack)
2844                                 goto out_put;
2845                         callchain_ret = 1;
2846                 }
2847         }
2848 
2849         ttrace = thread__trace(thread, trace->output);
2850         if (ttrace == NULL)
2851                 goto out_put;
2852 
2853         if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2854                 ttrace->pfmaj++;
2855         else
2856                 ttrace->pfmin++;
2857 
2858         if (trace->summary_only)
2859                 goto out;
2860 
2861         thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2862 
2863         trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2864 
2865         fprintf(trace->output, "%sfault [",
2866                 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2867                 "maj" : "min");
2868 
2869         print_location(trace->output, sample, &al, false, true);
2870 
2871         fprintf(trace->output, "] => ");
2872 
2873         thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2874 
2875         if (!al.map) {
2876                 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2877 
2878                 if (al.map)
2879                         map_type = 'x';
2880                 else
2881                         map_type = '?';
2882         }
2883 
2884         print_location(trace->output, sample, &al, true, false);
2885 
2886         fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2887 
2888         if (callchain_ret > 0)
2889                 trace__fprintf_callchain(trace, sample);
2890         else if (callchain_ret < 0)
2891                 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2892 
2893         ++trace->nr_events_printed;
2894 out:
2895         err = 0;
2896 out_put:
2897         thread__put(thread);
2898         return err;
2899 }
2900 
2901 static void trace__set_base_time(struct trace *trace,
2902                                  struct evsel *evsel,
2903                                  struct perf_sample *sample)
2904 {
2905         /*
2906          * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2907          * and don't use sample->time unconditionally, we may end up having
2908          * some other event in the future without PERF_SAMPLE_TIME for good
2909          * reason, i.e. we may not be interested in its timestamps, just in
2910          * it taking place, picking some piece of information when it
2911          * appears in our event stream (vfs_getname comes to mind).
2912          */
2913         if (trace->base_time == 0 && !trace->full_time &&
2914             (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2915                 trace->base_time = sample->time;
2916 }
2917 
2918 static int trace__process_sample(struct perf_tool *tool,
2919                                  union perf_event *event,
2920                                  struct perf_sample *sample,
2921                                  struct evsel *evsel,
2922                                  struct machine *machine __maybe_unused)
2923 {
2924         struct trace *trace = container_of(tool, struct trace, tool);
2925         struct thread *thread;
2926         int err = 0;
2927 
2928         tracepoint_handler handler = evsel->handler;
2929 
2930         thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2931         if (thread && thread__is_filtered(thread))
2932                 goto out;
2933 
2934         trace__set_base_time(trace, evsel, sample);
2935 
2936         if (handler) {
2937                 ++trace->nr_events;
2938                 handler(trace, evsel, event, sample);
2939         }
2940 out:
2941         thread__put(thread);
2942         return err;
2943 }
2944 
2945 static int trace__record(struct trace *trace, int argc, const char **argv)
2946 {
2947         unsigned int rec_argc, i, j;
2948         const char **rec_argv;
2949         const char * const record_args[] = {
2950                 "record",
2951                 "-R",
2952                 "-m", "1024",
2953                 "-c", "1",
2954         };
2955         pid_t pid = getpid();
2956         char *filter = asprintf__tp_filter_pids(1, &pid);
2957         const char * const sc_args[] = { "-e", };
2958         unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2959         const char * const majpf_args[] = { "-e", "major-faults" };
2960         unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2961         const char * const minpf_args[] = { "-e", "minor-faults" };
2962         unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2963         int err = -1;
2964 
2965         /* +3 is for the event string below and the pid filter */
2966         rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
2967                 majpf_args_nr + minpf_args_nr + argc;
2968         rec_argv = calloc(rec_argc + 1, sizeof(char *));
2969 
2970         if (rec_argv == NULL || filter == NULL)
2971                 goto out_free;
2972 
2973         j = 0;
2974         for (i = 0; i < ARRAY_SIZE(record_args); i++)
2975                 rec_argv[j++] = record_args[i];
2976 
2977         if (trace->trace_syscalls) {
2978                 for (i = 0; i < sc_args_nr; i++)
2979                         rec_argv[j++] = sc_args[i];
2980 
2981                 /* event string may be different for older kernels - e.g., RHEL6 */
2982                 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2983                         rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2984                 else if (is_valid_tracepoint("syscalls:sys_enter"))
2985                         rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2986                 else {
2987                         pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2988                         goto out_free;
2989                 }
2990         }
2991 
2992         rec_argv[j++] = "--filter";
2993         rec_argv[j++] = filter;
2994 
2995         if (trace->trace_pgfaults & TRACE_PFMAJ)
2996                 for (i = 0; i < majpf_args_nr; i++)
2997                         rec_argv[j++] = majpf_args[i];
2998 
2999         if (trace->trace_pgfaults & TRACE_PFMIN)
3000                 for (i = 0; i < minpf_args_nr; i++)
3001                         rec_argv[j++] = minpf_args[i];
3002 
3003         for (i = 0; i < (unsigned int)argc; i++)
3004                 rec_argv[j++] = argv[i];
3005 
3006         err = cmd_record(j, rec_argv);
3007 out_free:
3008         free(filter);
3009         free(rec_argv);
3010         return err;
3011 }
3012 
3013 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3014 
3015 static bool evlist__add_vfs_getname(struct evlist *evlist)
3016 {
3017         bool found = false;
3018         struct evsel *evsel, *tmp;
3019         struct parse_events_error err;
3020         int ret;
3021 
3022         bzero(&err, sizeof(err));
3023         ret = parse_events(evlist, "probe:vfs_getname*", &err);
3024         if (ret) {
3025                 free(err.str);
3026                 free(err.help);
3027                 free(err.first_str);
3028                 free(err.first_help);
3029                 return false;
3030         }
3031 
3032         evlist__for_each_entry_safe(evlist, evsel, tmp) {
3033                 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
3034                         continue;
3035 
3036                 if (perf_evsel__field(evsel, "pathname")) {
3037                         evsel->handler = trace__vfs_getname;
3038                         found = true;
3039                         continue;
3040                 }
3041 
3042                 list_del_init(&evsel->core.node);
3043                 evsel->evlist = NULL;
3044                 evsel__delete(evsel);
3045         }
3046 
3047         return found;
3048 }
3049 
3050 static struct evsel *perf_evsel__new_pgfault(u64 config)
3051 {
3052         struct evsel *evsel;
3053         struct perf_event_attr attr = {
3054                 .type = PERF_TYPE_SOFTWARE,
3055                 .mmap_data = 1,
3056         };
3057 
3058         attr.config = config;
3059         attr.sample_period = 1;
3060 
3061         event_attr_init(&attr);
3062 
3063         evsel = evsel__new(&attr);
3064         if (evsel)
3065                 evsel->handler = trace__pgfault;
3066 
3067         return evsel;
3068 }
3069 
3070 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3071 {
3072         const u32 type = event->header.type;
3073         struct evsel *evsel;
3074 
3075         if (type != PERF_RECORD_SAMPLE) {
3076                 trace__process_event(trace, trace->host, event, sample);
3077                 return;
3078         }
3079 
3080         evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
3081         if (evsel == NULL) {
3082                 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3083                 return;
3084         }
3085 
3086         if (evswitch__discard(&trace->evswitch, evsel))
3087                 return;
3088 
3089         trace__set_base_time(trace, evsel, sample);
3090 
3091         if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3092             sample->raw_data == NULL) {
3093                 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3094                        perf_evsel__name(evsel), sample->tid,
3095                        sample->cpu, sample->raw_size);
3096         } else {
3097                 tracepoint_handler handler = evsel->handler;
3098                 handler(trace, evsel, event, sample);
3099         }
3100 
3101         if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3102                 interrupted = true;
3103 }
3104 
3105 static int trace__add_syscall_newtp(struct trace *trace)
3106 {
3107         int ret = -1;
3108         struct evlist *evlist = trace->evlist;
3109         struct evsel *sys_enter, *sys_exit;
3110 
3111         sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3112         if (sys_enter == NULL)
3113                 goto out;
3114 
3115         if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3116                 goto out_delete_sys_enter;
3117 
3118         sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3119         if (sys_exit == NULL)
3120                 goto out_delete_sys_enter;
3121 
3122         if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3123                 goto out_delete_sys_exit;
3124 
3125         perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3126         perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3127 
3128         evlist__add(evlist, sys_enter);
3129         evlist__add(evlist, sys_exit);
3130 
3131         if (callchain_param.enabled && !trace->kernel_syscallchains) {
3132                 /*
3133                  * We're interested only in the user space callchain
3134                  * leading to the syscall, allow overriding that for
3135                  * debugging reasons using --kernel_syscall_callchains
3136                  */
3137                 sys_exit->core.attr.exclude_callchain_kernel = 1;
3138         }
3139 
3140         trace->syscalls.events.sys_enter = sys_enter;
3141         trace->syscalls.events.sys_exit  = sys_exit;
3142 
3143         ret = 0;
3144 out:
3145         return ret;
3146 
3147 out_delete_sys_exit:
3148         evsel__delete_priv(sys_exit);
3149 out_delete_sys_enter:
3150         evsel__delete_priv(sys_enter);
3151         goto out;
3152 }
3153 
3154 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3155 {
3156         int err = -1;
3157         struct evsel *sys_exit;
3158         char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3159                                                 trace->ev_qualifier_ids.nr,
3160                                                 trace->ev_qualifier_ids.entries);
3161 
3162         if (filter == NULL)
3163                 goto out_enomem;
3164 
3165         if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
3166                                           filter)) {
3167                 sys_exit = trace->syscalls.events.sys_exit;
3168                 err = perf_evsel__append_tp_filter(sys_exit, filter);
3169         }
3170 
3171         free(filter);
3172 out:
3173         return err;
3174 out_enomem:
3175         errno = ENOMEM;
3176         goto out;
3177 }
3178 
3179 #ifdef HAVE_LIBBPF_SUPPORT
3180 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3181 {
3182         if (trace->bpf_obj == NULL)
3183                 return NULL;
3184 
3185         return bpf_object__find_program_by_title(trace->bpf_obj, name);
3186 }
3187 
3188 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3189                                                         const char *prog_name, const char *type)
3190 {
3191         struct bpf_program *prog;
3192 
3193         if (prog_name == NULL) {
3194                 char default_prog_name[256];
3195                 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3196                 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3197                 if (prog != NULL)
3198                         goto out_found;
3199                 if (sc->fmt && sc->fmt->alias) {
3200                         scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3201                         prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3202                         if (prog != NULL)
3203                                 goto out_found;
3204                 }
3205                 goto out_unaugmented;
3206         }
3207 
3208         prog = trace__find_bpf_program_by_title(trace, prog_name);
3209 
3210         if (prog != NULL) {
3211 out_found:
3212                 return prog;
3213         }
3214 
3215         pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3216                  prog_name, type, sc->name);
3217 out_unaugmented:
3218         return trace->syscalls.unaugmented_prog;
3219 }
3220 
3221 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3222 {
3223         struct syscall *sc = trace__syscall_info(trace, NULL, id);
3224 
3225         if (sc == NULL)
3226                 return;
3227 
3228         sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3229         sc->bpf_prog.sys_exit  = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit  : NULL,  "exit");
3230 }
3231 
3232 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3233 {
3234         struct syscall *sc = trace__syscall_info(trace, NULL, id);
3235         return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3236 }
3237 
3238 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3239 {
3240         struct syscall *sc = trace__syscall_info(trace, NULL, id);
3241         return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3242 }
3243 
3244 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3245 {
3246         struct syscall *sc = trace__syscall_info(trace, NULL, id);
3247         int arg = 0;
3248 
3249         if (sc == NULL)
3250                 goto out;
3251 
3252         for (; arg < sc->nr_args; ++arg) {
3253                 entry->string_args_len[arg] = 0;
3254                 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3255                         /* Should be set like strace -s strsize */
3256                         entry->string_args_len[arg] = PATH_MAX;
3257                 }
3258         }
3259 out:
3260         for (; arg < 6; ++arg)
3261                 entry->string_args_len[arg] = 0;
3262 }
3263 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3264 {
3265         int fd = bpf_map__fd(trace->syscalls.map);
3266         struct bpf_map_syscall_entry value = {
3267                 .enabled = !trace->not_ev_qualifier,
3268         };
3269         int err = 0;
3270         size_t i;
3271 
3272         for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3273                 int key = trace->ev_qualifier_ids.entries[i];
3274 
3275                 if (value.enabled) {
3276                         trace__init_bpf_map_syscall_args(trace, key, &value);
3277                         trace__init_syscall_bpf_progs(trace, key);
3278                 }
3279 
3280                 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3281                 if (err)
3282                         break;
3283         }
3284 
3285         return err;
3286 }
3287 
3288 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3289 {
3290         int fd = bpf_map__fd(trace->syscalls.map);
3291         struct bpf_map_syscall_entry value = {
3292                 .enabled = enabled,
3293         };
3294         int err = 0, key;
3295 
3296         for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3297                 if (enabled)
3298                         trace__init_bpf_map_syscall_args(trace, key, &value);
3299 
3300                 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3301                 if (err)
3302                         break;
3303         }
3304 
3305         return err;
3306 }
3307 
3308 static int trace__init_syscalls_bpf_map(struct trace *trace)
3309 {
3310         bool enabled = true;
3311 
3312         if (trace->ev_qualifier_ids.nr)
3313                 enabled = trace->not_ev_qualifier;
3314 
3315         return __trace__init_syscalls_bpf_map(trace, enabled);
3316 }
3317 
3318 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3319 {
3320         struct tep_format_field *field, *candidate_field;
3321         int id;
3322 
3323         /*
3324          * We're only interested in syscalls that have a pointer:
3325          */
3326         for (field = sc->args; field; field = field->next) {
3327                 if (field->flags & TEP_FIELD_IS_POINTER)
3328                         goto try_to_find_pair;
3329         }
3330 
3331         return NULL;
3332 
3333 try_to_find_pair:
3334         for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3335                 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3336                 struct bpf_program *pair_prog;
3337                 bool is_candidate = false;
3338 
3339                 if (pair == NULL || pair == sc ||
3340                     pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3341                         continue;
3342 
3343                 for (field = sc->args, candidate_field = pair->args;
3344                      field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3345                         bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3346                              candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3347 
3348                         if (is_pointer) {
3349                                if (!candidate_is_pointer) {
3350                                         // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3351                                         continue;
3352                                }
3353                         } else {
3354                                 if (candidate_is_pointer) {
3355                                         // The candidate might copy a pointer we don't have, skip it.
3356                                         goto next_candidate;
3357                                 }
3358                                 continue;
3359                         }
3360 
3361                         if (strcmp(field->type, candidate_field->type))
3362                                 goto next_candidate;
3363 
3364                         is_candidate = true;
3365                 }
3366 
3367                 if (!is_candidate)
3368                         goto next_candidate;
3369 
3370                 /*
3371                  * Check if the tentative pair syscall augmenter has more pointers, if it has,
3372                  * then it may be collecting that and we then can't use it, as it would collect
3373                  * more than what is common to the two syscalls.
3374                  */
3375                 if (candidate_field) {
3376                         for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3377                                 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3378                                         goto next_candidate;
3379                 }
3380 
3381                 pair_prog = pair->bpf_prog.sys_enter;
3382                 /*
3383                  * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3384                  * have been searched for, so search it here and if it returns the
3385                  * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3386                  * program for a filtered syscall on a non-filtered one.
3387                  *
3388                  * For instance, we have "!syscalls:sys_enter_renameat" and that is
3389                  * useful for "renameat2".
3390                  */
3391                 if (pair_prog == NULL) {
3392                         pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3393                         if (pair_prog == trace->syscalls.unaugmented_prog)
3394                                 goto next_candidate;
3395                 }
3396 
3397                 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3398                 return pair_prog;
3399         next_candidate:
3400                 continue;
3401         }
3402 
3403         return NULL;
3404 }
3405 
3406 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3407 {
3408         int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3409             map_exit_fd  = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3410         int err = 0, key;
3411 
3412         for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3413                 int prog_fd;
3414 
3415                 if (!trace__syscall_enabled(trace, key))
3416                         continue;
3417 
3418                 trace__init_syscall_bpf_progs(trace, key);
3419 
3420                 // It'll get at least the "!raw_syscalls:unaugmented"
3421                 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3422                 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3423                 if (err)
3424                         break;
3425                 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3426                 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3427                 if (err)
3428                         break;
3429         }
3430 
3431         /*
3432          * Now lets do a second pass looking for enabled syscalls without
3433          * an augmenter that have a signature that is a superset of another
3434          * syscall with an augmenter so that we can auto-reuse it.
3435          *
3436          * I.e. if we have an augmenter for the "open" syscall that has
3437          * this signature:
3438          *
3439          *   int open(const char *pathname, int flags, mode_t mode);
3440          *
3441          * I.e. that will collect just the first string argument, then we
3442          * can reuse it for the 'creat' syscall, that has this signature:
3443          *
3444          *   int creat(const char *pathname, mode_t mode);
3445          *
3446          * and for:
3447          *
3448          *   int stat(const char *pathname, struct stat *statbuf);
3449          *   int lstat(const char *pathname, struct stat *statbuf);
3450          *
3451          * Because the 'open' augmenter will collect the first arg as a string,
3452          * and leave alone all the other args, which already helps with
3453          * beautifying 'stat' and 'lstat''s pathname arg.
3454          *
3455          * Then, in time, when 'stat' gets an augmenter that collects both
3456          * first and second arg (this one on the raw_syscalls:sys_exit prog
3457          * array tail call, then that one will be used.
3458          */
3459         for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3460                 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3461                 struct bpf_program *pair_prog;
3462                 int prog_fd;
3463 
3464                 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3465                         continue;
3466 
3467                 /*
3468                  * For now we're just reusing the sys_enter prog, and if it
3469                  * already has an augmenter, we don't need to find one.
3470                  */
3471                 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3472                         continue;
3473 
3474                 /*
3475                  * Look at all the other syscalls for one that has a signature
3476                  * that is close enough that we can share:
3477                  */
3478                 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3479                 if (pair_prog == NULL)
3480                         continue;
3481 
3482                 sc->bpf_prog.sys_enter = pair_prog;
3483 
3484                 /*
3485                  * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3486                  * with the fd for the program we're reusing:
3487                  */
3488                 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3489                 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3490                 if (err)
3491                         break;
3492         }
3493 
3494 
3495         return err;
3496 }
3497 
3498 static void trace__delete_augmented_syscalls(struct trace *trace)
3499 {
3500         struct evsel *evsel, *tmp;
3501 
3502         evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3503         evsel__delete(trace->syscalls.events.augmented);
3504         trace->syscalls.events.augmented = NULL;
3505 
3506         evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3507                 if (evsel->bpf_obj == trace->bpf_obj) {
3508                         evlist__remove(trace->evlist, evsel);
3509                         evsel__delete(evsel);
3510                 }
3511 
3512         }
3513 
3514         bpf_object__close(trace->bpf_obj);
3515         trace->bpf_obj = NULL;
3516 }
3517 #else // HAVE_LIBBPF_SUPPORT
3518 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3519 {
3520         return 0;
3521 }
3522 
3523 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3524 {
3525         return 0;
3526 }
3527 
3528 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3529                                                             const char *name __maybe_unused)
3530 {
3531         return NULL;
3532 }
3533 
3534 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3535 {
3536         return 0;
3537 }
3538 
3539 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3540 {
3541 }
3542 #endif // HAVE_LIBBPF_SUPPORT
3543 
3544 static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3545 {
3546         struct evsel *evsel;
3547 
3548         evlist__for_each_entry(trace->evlist, evsel) {
3549                 if (evsel == trace->syscalls.events.augmented ||
3550                     evsel->bpf_obj == trace->bpf_obj)
3551                         continue;
3552 
3553                 return false;
3554         }
3555 
3556         return true;
3557 }
3558 
3559 static int trace__set_ev_qualifier_filter(struct trace *trace)
3560 {
3561         if (trace->syscalls.map)
3562                 return trace__set_ev_qualifier_bpf_filter(trace);
3563         if (trace->syscalls.events.sys_enter)
3564                 return trace__set_ev_qualifier_tp_filter(trace);
3565         return 0;
3566 }
3567 
3568 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3569                                     size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3570 {
3571         int err = 0;
3572 #ifdef HAVE_LIBBPF_SUPPORT
3573         bool value = true;
3574         int map_fd = bpf_map__fd(map);
3575         size_t i;
3576 
3577         for (i = 0; i < npids; ++i) {
3578                 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3579                 if (err)
3580                         break;
3581         }
3582 #endif
3583         return err;
3584 }
3585 
3586 static int trace__set_filter_loop_pids(struct trace *trace)
3587 {
3588         unsigned int nr = 1, err;
3589         pid_t pids[32] = {
3590                 getpid(),
3591         };
3592         struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3593 
3594         while (thread && nr < ARRAY_SIZE(pids)) {
3595                 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3596 
3597                 if (parent == NULL)
3598                         break;
3599 
3600                 if (!strcmp(thread__comm_str(parent), "sshd") ||
3601                     strstarts(thread__comm_str(parent), "gnome-terminal")) {
3602                         pids[nr++] = parent->tid;
3603                         break;
3604                 }
3605                 thread = parent;
3606         }
3607 
3608         err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3609         if (!err && trace->filter_pids.map)
3610                 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3611 
3612         return err;
3613 }
3614 
3615 static int trace__set_filter_pids(struct trace *trace)
3616 {
3617         int err = 0;
3618         /*
3619          * Better not use !target__has_task() here because we need to cover the
3620          * case where no threads were specified in the command line, but a
3621          * workload was, and in that case we will fill in the thread_map when
3622          * we fork the workload in perf_evlist__prepare_workload.
3623          */
3624         if (trace->filter_pids.nr > 0) {
3625                 err = perf_evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3626                                                          trace->filter_pids.entries);
3627                 if (!err && trace->filter_pids.map) {
3628                         err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3629                                                        trace->filter_pids.entries);
3630                 }
3631         } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3632                 err = trace__set_filter_loop_pids(trace);
3633         }
3634 
3635         return err;
3636 }
3637 
3638 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3639 {
3640         struct evlist *evlist = trace->evlist;
3641         struct perf_sample sample;
3642         int err;
3643 
3644         err = perf_evlist__parse_sample(evlist, event, &sample);
3645         if (err)
3646                 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3647         else
3648                 trace__handle_event(trace, event, &sample);
3649 
3650         return 0;
3651 }
3652 
3653 static int __trace__flush_events(struct trace *trace)
3654 {
3655         u64 first = ordered_events__first_time(&trace->oe.data);
3656         u64 flush = trace->oe.last - NSEC_PER_SEC;
3657 
3658         /* Is there some thing to flush.. */
3659         if (first && first < flush)
3660                 return ordered_events__flush_time(&trace->oe.data, flush);
3661 
3662         return 0;
3663 }
3664 
3665 static int trace__flush_events(struct trace *trace)
3666 {
3667         return !trace->sort_events ? 0 : __trace__flush_events(trace);
3668 }
3669 
3670 static int trace__deliver_event(struct trace *trace, union perf_event *event)
3671 {
3672         int err;
3673 
3674         if (!trace->sort_events)
3675                 return __trace__deliver_event(trace, event);
3676 
3677         err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3678         if (err && err != -1)
3679                 return err;
3680 
3681         err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3682         if (err)
3683                 return err;
3684 
3685         return trace__flush_events(trace);
3686 }
3687 
3688 static int ordered_events__deliver_event(struct ordered_events *oe,
3689                                          struct ordered_event *event)
3690 {
3691         struct trace *trace = container_of(oe, struct trace, oe.data);
3692 
3693         return __trace__deliver_event(trace, event->event);
3694 }
3695 
3696 static struct syscall_arg_fmt *perf_evsel__syscall_arg_fmt(struct evsel *evsel, char *arg)
3697 {
3698         struct tep_format_field *field;
3699         struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3700 
3701         if (evsel->tp_format == NULL || fmt == NULL)
3702                 return NULL;
3703 
3704         for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3705                 if (strcmp(field->name, arg) == 0)
3706                         return fmt;
3707 
3708         return NULL;
3709 }
3710 
3711 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3712 {
3713         char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3714 
3715         while ((tok = strpbrk(left, "=<>!")) != NULL) {
3716                 char *right = tok + 1, *right_end;
3717 
3718                 if (*right == '=')
3719                         ++right;
3720 
3721                 while (isspace(*right))
3722                         ++right;
3723 
3724                 if (*right == '\0')
3725                         break;
3726 
3727                 while (!isalpha(*left))
3728                         if (++left == tok) {
3729                                 /*
3730                                  * Bail out, can't find the name of the argument that is being
3731                                  * used in the filter, let it try to set this filter, will fail later.
3732                                  */
3733                                 return 0;
3734                         }
3735 
3736                 right_end = right + 1;
3737                 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3738                         ++right_end;
3739 
3740                 if (isalpha(*right)) {
3741                         struct syscall_arg_fmt *fmt;
3742                         int left_size = tok - left,
3743                             right_size = right_end - right;
3744                         char arg[128];
3745 
3746                         while (isspace(left[left_size - 1]))
3747                                 --left_size;
3748 
3749                         scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3750 
3751                         fmt = perf_evsel__syscall_arg_fmt(evsel, arg);
3752                         if (fmt == NULL) {
3753                                 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3754                                        arg, evsel->name, evsel->filter);
3755                                 return -1;
3756                         }
3757 
3758                         pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3759                                  arg, (int)(right - tok), tok, right_size, right);
3760 
3761                         if (fmt->strtoul) {
3762                                 u64 val;
3763                                 struct syscall_arg syscall_arg = {
3764                                         .parm = fmt->parm,
3765                                 };
3766 
3767                                 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3768                                         char *n, expansion[19];
3769                                         int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3770                                         int expansion_offset = right - new_filter;
3771 
3772                                         pr_debug("%s", expansion);
3773 
3774                                         if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3775                                                 pr_debug(" out of memory!\n");
3776                                                 free(new_filter);
3777                                                 return -1;
3778                                         }
3779                                         if (new_filter != evsel->filter)
3780                                                 free(new_filter);
3781                                         left = n + expansion_offset + expansion_lenght;
3782                                         new_filter = n;
3783                                 } else {
3784                                         pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3785                                                right_size, right, arg, evsel->name, evsel->filter);
3786                                         return -1;
3787                                 }
3788                         } else {
3789                                 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3790                                        arg, evsel->name, evsel->filter);
3791                                 return -1;
3792                         }
3793 
3794                         pr_debug("\n");
3795                 } else {
3796                         left = right_end;
3797                 }
3798         }
3799 
3800         if (new_filter != evsel->filter) {
3801                 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3802                 perf_evsel__set_filter(evsel, new_filter);
3803                 free(new_filter);
3804         }
3805 
3806         return 0;
3807 }
3808 
3809 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3810 {
3811         struct evlist *evlist = trace->evlist;
3812         struct evsel *evsel;
3813 
3814         evlist__for_each_entry(evlist, evsel) {
3815                 if (evsel->filter == NULL)
3816                         continue;
3817 
3818                 if (trace__expand_filter(trace, evsel)) {
3819                         *err_evsel = evsel;
3820                         return -1;
3821                 }
3822         }
3823 
3824         return 0;
3825 }
3826 
3827 static int trace__run(struct trace *trace, int argc, const char **argv)
3828 {
3829         struct evlist *evlist = trace->evlist;
3830         struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3831         int err = -1, i;
3832         unsigned long before;
3833         const bool forks = argc > 0;
3834         bool draining = false;
3835 
3836         trace->live = true;
3837 
3838         if (!trace->raw_augmented_syscalls) {
3839                 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3840                         goto out_error_raw_syscalls;
3841 
3842                 if (trace->trace_syscalls)
3843                         trace->vfs_getname = evlist__add_vfs_getname(evlist);
3844         }
3845 
3846         if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3847                 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3848                 if (pgfault_maj == NULL)
3849                         goto out_error_mem;
3850                 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3851                 evlist__add(evlist, pgfault_maj);
3852         }
3853 
3854         if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3855                 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3856                 if (pgfault_min == NULL)
3857                         goto out_error_mem;
3858                 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3859                 evlist__add(evlist, pgfault_min);
3860         }
3861 
3862         if (trace->sched &&
3863             perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
3864                                    trace__sched_stat_runtime))
3865                 goto out_error_sched_stat_runtime;
3866         /*
3867          * If a global cgroup was set, apply it to all the events without an
3868          * explicit cgroup. I.e.:
3869          *
3870          *      trace -G A -e sched:*switch
3871          *
3872          * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3873          * _and_ sched:sched_switch to the 'A' cgroup, while:
3874          *
3875          * trace -e sched:*switch -G A
3876          *
3877          * will only set the sched:sched_switch event to the 'A' cgroup, all the
3878          * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3879          * a cgroup (on the root cgroup, sys wide, etc).
3880          *
3881          * Multiple cgroups:
3882          *
3883          * trace -G A -e sched:*switch -G B
3884          *
3885          * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3886          * to the 'B' cgroup.
3887          *
3888          * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3889          * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3890          */
3891         if (trace->cgroup)
3892                 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3893 
3894         err = perf_evlist__create_maps(evlist, &trace->opts.target);
3895         if (err < 0) {
3896                 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3897                 goto out_delete_evlist;
3898         }
3899 
3900         err = trace__symbols_init(trace, evlist);
3901         if (err < 0) {
3902                 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3903                 goto out_delete_evlist;
3904         }
3905 
3906         perf_evlist__config(evlist, &trace->opts, &callchain_param);
3907 
3908         signal(SIGCHLD, sig_handler);
3909         signal(SIGINT, sig_handler);
3910 
3911         if (forks) {
3912                 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3913                                                     argv, false, NULL);
3914                 if (err < 0) {
3915                         fprintf(trace->output, "Couldn't run the workload!\n");
3916                         goto out_delete_evlist;
3917                 }
3918         }
3919 
3920         err = evlist__open(evlist);
3921         if (err < 0)
3922                 goto out_error_open;
3923 
3924         err = bpf__apply_obj_config();
3925         if (err) {
3926                 char errbuf[BUFSIZ];
3927 
3928                 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3929                 pr_err("ERROR: Apply config to BPF failed: %s\n",
3930                          errbuf);
3931                 goto out_error_open;
3932         }
3933 
3934         err = trace__set_filter_pids(trace);
3935         if (err < 0)
3936                 goto out_error_mem;
3937 
3938         if (trace->syscalls.map)
3939                 trace__init_syscalls_bpf_map(trace);
3940 
3941         if (trace->syscalls.prog_array.sys_enter)
3942                 trace__init_syscalls_bpf_prog_array_maps(trace);
3943 
3944         if (trace->ev_qualifier_ids.nr > 0) {
3945                 err = trace__set_ev_qualifier_filter(trace);
3946                 if (err < 0)
3947                         goto out_errno;
3948 
3949                 if (trace->syscalls.events.sys_exit) {
3950                         pr_debug("event qualifier tracepoint filter: %s\n",
3951                                  trace->syscalls.events.sys_exit->filter);
3952                 }
3953         }
3954 
3955         /*
3956          * If the "close" syscall is not traced, then we will not have the
3957          * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3958          * fd->pathname table and were ending up showing the last value set by
3959          * syscalls opening a pathname and associating it with a descriptor or
3960          * reading it from /proc/pid/fd/ in cases where that doesn't make
3961          * sense.
3962          *
3963          *  So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3964          *  not in use.
3965          */
3966         trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
3967 
3968         err = trace__expand_filters(trace, &evsel);
3969         if (err)
3970                 goto out_delete_evlist;
3971         err = perf_evlist__apply_filters(evlist, &evsel);
3972         if (err < 0)
3973                 goto out_error_apply_filters;
3974 
3975         if (trace->dump.map)
3976                 bpf_map__fprintf(trace->dump.map, trace->output);
3977 
3978         err = evlist__mmap(evlist, trace->opts.mmap_pages);
3979         if (err < 0)
3980                 goto out_error_mmap;
3981 
3982         if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
3983                 evlist__enable(evlist);
3984 
3985         if (forks)
3986                 perf_evlist__start_workload(evlist);
3987 
3988         if (trace->opts.initial_delay) {
3989                 usleep(trace->opts.initial_delay * 1000);
3990                 evlist__enable(evlist);
3991         }
3992 
3993         trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3994                                   evlist->core.threads->nr > 1 ||
3995                                   evlist__first(evlist)->core.attr.inherit;
3996 
3997         /*
3998          * Now that we already used evsel->core.attr to ask the kernel to setup the
3999          * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4000          * trace__resolve_callchain(), allowing per-event max-stack settings
4001          * to override an explicitly set --max-stack global setting.
4002          */
4003         evlist__for_each_entry(evlist, evsel) {
4004                 if (evsel__has_callchain(evsel) &&
4005                     evsel->core.attr.sample_max_stack == 0)
4006                         evsel->core.attr.sample_max_stack = trace->max_stack;
4007         }
4008 again:
4009         before = trace->nr_events;
4010 
4011         for (i = 0; i < evlist->core.nr_mmaps; i++) {
4012                 union perf_event *event;
4013                 struct mmap *md;
4014 
4015                 md = &evlist->mmap[i];
4016                 if (perf_mmap__read_init(&md->core) < 0)
4017                         continue;
4018 
4019                 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4020                         ++trace->nr_events;
4021 
4022                         err = trace__deliver_event(trace, event);
4023                         if (err)
4024                                 goto out_disable;
4025 
4026                         perf_mmap__consume(&md->core);
4027 
4028                         if (interrupted)
4029                                 goto out_disable;
4030 
4031                         if (done && !draining) {
4032                                 evlist__disable(evlist);
4033                                 draining = true;
4034                         }
4035                 }
4036                 perf_mmap__read_done(&md->core);
4037         }
4038 
4039         if (trace->nr_events == before) {
4040                 int timeout = done ? 100 : -1;
4041 
4042                 if (!draining && evlist__poll(evlist, timeout) > 0) {
4043                         if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4044                                 draining = true;
4045 
4046                         goto again;
4047                 } else {
4048                         if (trace__flush_events(trace))
4049                                 goto out_disable;
4050                 }
4051         } else {
4052                 goto again;
4053         }
4054 
4055 out_disable:
4056         thread__zput(trace->current);
4057 
4058         evlist__disable(evlist);
4059 
4060         if (trace->sort_events)
4061                 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4062 
4063         if (!err) {
4064                 if (trace->summary)
4065                         trace__fprintf_thread_summary(trace, trace->output);
4066 
4067                 if (trace->show_tool_stats) {
4068                         fprintf(trace->output, "Stats:\n "
4069                                                " vfs_getname : %" PRIu64 "\n"
4070                                                " proc_getname: %" PRIu64 "\n",
4071                                 trace->stats.vfs_getname,
4072                                 trace->stats.proc_getname);
4073                 }
4074         }
4075 
4076 out_delete_evlist:
4077         trace__symbols__exit(trace);
4078 
4079         evlist__delete(evlist);
4080         cgroup__put(trace->cgroup);
4081         trace->evlist = NULL;
4082         trace->live = false;
4083         return err;
4084 {
4085         char errbuf[BUFSIZ];
4086 
4087 out_error_sched_stat_runtime:
4088         tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4089         goto out_error;
4090 
4091 out_error_raw_syscalls:
4092         tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4093         goto out_error;
4094 
4095 out_error_mmap:
4096         perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4097         goto out_error;
4098 
4099 out_error_open:
4100         perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4101 
4102 out_error:
4103         fprintf(trace->output, "%s\n", errbuf);
4104         goto out_delete_evlist;
4105 
4106 out_error_apply_filters:
4107         fprintf(trace->output,
4108                 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4109                 evsel->filter, perf_evsel__name(evsel), errno,
4110                 str_error_r(errno, errbuf, sizeof(errbuf)));
4111         goto out_delete_evlist;
4112 }
4113 out_error_mem:
4114         fprintf(trace->output, "Not enough memory to run!\n");
4115         goto out_delete_evlist;
4116 
4117 out_errno:
4118         fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4119         goto out_delete_evlist;
4120 }
4121 
4122 static int trace__replay(struct trace *trace)
4123 {
4124         const struct evsel_str_handler handlers[] = {
4125                 { "probe:vfs_getname",       trace__vfs_getname, },
4126         };
4127         struct perf_data data = {
4128                 .path  = input_name,
4129                 .mode  = PERF_DATA_MODE_READ,
4130                 .force = trace->force,
4131         };
4132         struct perf_session *session;
4133         struct evsel *evsel;
4134         int err = -1;
4135 
4136         trace->tool.sample        = trace__process_sample;
4137         trace->tool.mmap          = perf_event__process_mmap;
4138         trace->tool.mmap2         = perf_event__process_mmap2;
4139         trace->tool.comm          = perf_event__process_comm;
4140         trace->tool.exit          = perf_event__process_exit;
4141         trace->tool.fork          = perf_event__process_fork;
4142         trace->tool.attr          = perf_event__process_attr;
4143         trace->tool.tracing_data  = perf_event__process_tracing_data;
4144         trace->tool.build_id      = perf_event__process_build_id;
4145         trace->tool.namespaces    = perf_event__process_namespaces;
4146 
4147         trace->tool.ordered_events = true;
4148         trace->tool.ordering_requires_timestamps = true;
4149 
4150         /* add tid to output */
4151         trace->multiple_threads = true;
4152 
4153         session = perf_session__new(&data, false, &trace->tool);
4154         if (IS_ERR(session))
4155                 return PTR_ERR(session);
4156 
4157         if (trace->opts.target.pid)
4158                 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4159 
4160         if (trace->opts.target.tid)
4161                 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4162 
4163         if (symbol__init(&session->header.env) < 0)
4164                 goto out;
4165 
4166         trace->host = &session->machines.host;
4167 
4168         err = perf_session__set_tracepoints_handlers(session, handlers);
4169         if (err)
4170                 goto out;
4171 
4172         evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4173                                                      "raw_syscalls:sys_enter");
4174         /* older kernels have syscalls tp versus raw_syscalls */
4175         if (evsel == NULL)
4176                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4177                                                              "syscalls:sys_enter");
4178 
4179         if (evsel &&
4180             (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4181             perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4182                 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4183                 goto out;
4184         }
4185 
4186         evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4187                                                      "raw_syscalls:sys_exit");
4188         if (evsel == NULL)
4189                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4190                                                              "syscalls:sys_exit");
4191         if (evsel &&
4192             (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4193             perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4194                 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4195                 goto out;
4196         }
4197 
4198         evlist__for_each_entry(session->evlist, evsel) {
4199                 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4200                     (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4201                      evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4202                      evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4203                         evsel->handler = trace__pgfault;
4204         }
4205 
4206         setup_pager();
4207 
4208         err = perf_session__process_events(session);
4209         if (err)
4210                 pr_err("Failed to process events, error %d", err);
4211 
4212         else if (trace->summary)
4213                 trace__fprintf_thread_summary(trace, trace->output);
4214 
4215 out:
4216         perf_session__delete(session);
4217 
4218         return err;
4219 }
4220 
4221 static size_t trace__fprintf_threads_header(FILE *fp)
4222 {
4223         size_t printed;
4224 
4225         printed  = fprintf(fp, "\n Summary of events:\n\n");
4226 
4227         return printed;
4228 }
4229 
4230 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4231         struct syscall_stats *stats;
4232         double               msecs;
4233         int                  syscall;
4234 )
4235 {
4236         struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4237         struct syscall_stats *stats = source->priv;
4238 
4239         entry->syscall = source->i;
4240         entry->stats   = stats;
4241         entry->msecs   = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4242 }
4243 
4244 static size_t thread__dump_stats(struct thread_trace *ttrace,
4245                                  struct trace *trace, FILE *fp)
4246 {
4247         size_t printed = 0;
4248         struct syscall *sc;
4249         struct rb_node *nd;
4250         DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4251 
4252         if (syscall_stats == NULL)
4253                 return 0;
4254 
4255         printed += fprintf(fp, "\n");
4256 
4257         printed += fprintf(fp, "   syscall            calls  errors  total       min       avg       max       stddev\n");
4258         printed += fprintf(fp, "                                     (msec)    (msec)    (msec)    (msec)        (%%)\n");
4259         printed += fprintf(fp, "   --------------- --------  ------ -------- --------- --------- ---------     ------\n");
4260 
4261         resort_rb__for_each_entry(nd, syscall_stats) {
4262                 struct syscall_stats *stats = syscall_stats_entry->stats;
4263                 if (stats) {
4264                         double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4265                         double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4266                         double avg = avg_stats(&stats->stats);
4267                         double pct;
4268                         u64 n = (u64)stats->stats.n;
4269 
4270                         pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4271                         avg /= NSEC_PER_MSEC;
4272 
4273                         sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4274                         printed += fprintf(fp, "   %-15s", sc->name);
4275                         printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4276                                            n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4277                         printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4278 
4279                         if (trace->errno_summary && stats->nr_failures) {
4280                                 const char *arch_name = perf_env__arch(trace->host->env);
4281                                 int e;
4282 
4283                                 for (e = 0; e < stats->max_errno; ++e) {
4284                                         if (stats->errnos[e] != 0)
4285                                                 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4286                                 }
4287                         }
4288                 }
4289         }
4290 
4291         resort_rb__delete(syscall_stats);
4292         printed += fprintf(fp, "\n\n");
4293 
4294         return printed;
4295 }
4296 
4297 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4298 {
4299         size_t printed = 0;
4300         struct thread_trace *ttrace = thread__priv(thread);
4301         double ratio;
4302 
4303         if (ttrace == NULL)
4304                 return 0;
4305 
4306         ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4307 
4308         printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4309         printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4310         printed += fprintf(fp, "%.1f%%", ratio);
4311         if (ttrace->pfmaj)
4312                 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4313         if (ttrace->pfmin)
4314                 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4315         if (trace->sched)
4316                 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4317         else if (fputc('\n', fp) != EOF)
4318                 ++printed;
4319 
4320         printed += thread__dump_stats(ttrace, trace, fp);
4321 
4322         return printed;
4323 }
4324 
4325 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4326 {
4327         return ttrace ? ttrace->nr_events : 0;
4328 }
4329 
4330 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4331         struct thread *thread;
4332 )
4333 {
4334         entry->thread = rb_entry(nd, struct thread, rb_node);
4335 }
4336 
4337 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4338 {
4339         size_t printed = trace__fprintf_threads_header(fp);
4340         struct rb_node *nd;
4341         int i;
4342 
4343         for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4344                 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4345 
4346                 if (threads == NULL) {
4347                         fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4348                         return 0;
4349                 }
4350 
4351                 resort_rb__for_each_entry(nd, threads)
4352                         printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4353 
4354                 resort_rb__delete(threads);
4355         }
4356         return printed;
4357 }
4358 
4359 static int trace__set_duration(const struct option *opt, const char *str,
4360                                int unset __maybe_unused)
4361 {
4362         struct trace *trace = opt->value;
4363 
4364         trace->duration_filter = atof(str);
4365         return 0;
4366 }
4367 
4368 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4369                                               int unset __maybe_unused)
4370 {
4371         int ret = -1;
4372         size_t i;
4373         struct trace *trace = opt->value;
4374         /*
4375          * FIXME: introduce a intarray class, plain parse csv and create a
4376          * { int nr, int entries[] } struct...
4377          */
4378         struct intlist *list = intlist__new(str);
4379 
4380         if (list == NULL)
4381                 return -1;
4382 
4383         i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4384         trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4385 
4386         if (trace->filter_pids.entries == NULL)
4387                 goto out;
4388 
4389         trace->filter_pids.entries[0] = getpid();
4390 
4391         for (i = 1; i < trace->filter_pids.nr; ++i)
4392                 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4393 
4394         intlist__delete(list);
4395         ret = 0;
4396 out:
4397         return ret;
4398 }
4399 
4400 static int trace__open_output(struct trace *trace, const char *filename)
4401 {
4402         struct stat st;
4403 
4404         if (!stat(filename, &st) && st.st_size) {
4405                 char oldname[PATH_MAX];
4406 
4407                 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4408                 unlink(oldname);
4409                 rename(filename, oldname);
4410         }
4411 
4412         trace->output = fopen(filename, "w");
4413 
4414         return trace->output == NULL ? -errno : 0;
4415 }
4416 
4417 static int parse_pagefaults(const struct option *opt, const char *str,
4418                             int unset __maybe_unused)
4419 {
4420         int *trace_pgfaults = opt->value;
4421 
4422         if (strcmp(str, "all") == 0)
4423                 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4424         else if (strcmp(str, "maj") == 0)
4425                 *trace_pgfaults |= TRACE_PFMAJ;
4426         else if (strcmp(str, "min") == 0)
4427                 *trace_pgfaults |= TRACE_PFMIN;
4428         else
4429                 return -1;
4430 
4431         return 0;
4432 }
4433 
4434 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4435 {
4436         struct evsel *evsel;
4437 
4438         evlist__for_each_entry(evlist, evsel) {
4439                 if (evsel->handler == NULL)
4440                         evsel->handler = handler;
4441         }
4442 }
4443 
4444 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4445 {
4446         struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4447 
4448         if (fmt) {
4449                 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4450 
4451                 if (scfmt) {
4452                         int skip = 0;
4453 
4454                         if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4455                             strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4456                                 ++skip;
4457 
4458                         memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4459                 }
4460         }
4461 }
4462 
4463 static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4464 {
4465         struct evsel *evsel;
4466 
4467         evlist__for_each_entry(evlist, evsel) {
4468                 if (evsel->priv || !evsel->tp_format)
4469                         continue;
4470 
4471                 if (strcmp(evsel->tp_format->system, "syscalls")) {
4472                         perf_evsel__init_tp_arg_scnprintf(evsel);
4473                         continue;
4474                 }
4475 
4476                 if (perf_evsel__init_syscall_tp(evsel))
4477                         return -1;
4478 
4479                 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4480                         struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4481 
4482                         if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4483                                 return -1;
4484 
4485                         evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4486                 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4487                         struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4488 
4489                         if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4490                                 return -1;
4491 
4492                         evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4493                 }
4494         }
4495 
4496         return 0;
4497 }
4498 
4499 /*
4500  * XXX: Hackish, just splitting the combined -e+--event (syscalls
4501  * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4502  * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4503  *
4504  * It'd be better to introduce a parse_options() variant that would return a
4505  * list with the terms it didn't match to an event...
4506  */
4507 static int trace__parse_events_option(const struct option *opt, const char *str,
4508                                       int unset __maybe_unused)
4509 {
4510         struct trace *trace = (struct trace *)opt->value;
4511         const char *s = str;
4512         char *sep = NULL, *lists[2] = { NULL, NULL, };
4513         int len = strlen(str) + 1, err = -1, list, idx;
4514         char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4515         char group_name[PATH_MAX];
4516         struct syscall_fmt *fmt;
4517 
4518         if (strace_groups_dir == NULL)
4519                 return -1;
4520 
4521         if (*s == '!') {
4522                 ++s;
4523                 trace->not_ev_qualifier = true;
4524         }
4525 
4526         while (1) {
4527                 if ((sep = strchr(s, ',')) != NULL)
4528                         *sep = '\0';
4529 
4530                 list = 0;
4531                 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4532                     syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4533                         list = 1;
4534                         goto do_concat;
4535                 }
4536 
4537                 fmt = syscall_fmt__find_by_alias(s);
4538                 if (fmt != NULL) {
4539                         list = 1;
4540                         s = fmt->name;
4541                 } else {
4542                         path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4543                         if (access(group_name, R_OK) == 0)
4544                                 list = 1;
4545                 }
4546 do_concat:
4547                 if (lists[list]) {
4548                         sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4549                 } else {
4550                         lists[list] = malloc(len);
4551                         if (lists[list] == NULL)
4552                                 goto out;
4553                         strcpy(lists[list], s);
4554                 }
4555 
4556                 if (!sep)
4557                         break;
4558 
4559                 *sep = ',';
4560                 s = sep + 1;
4561         }
4562 
4563         if (lists[1] != NULL) {
4564                 struct strlist_config slist_config = {
4565                         .dirname = strace_groups_dir,
4566                 };
4567 
4568                 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4569                 if (trace->ev_qualifier == NULL) {
4570                         fputs("Not enough memory to parse event qualifier", trace->output);
4571                         goto out;
4572                 }
4573 
4574                 if (trace__validate_ev_qualifier(trace))
4575                         goto out;
4576                 trace->trace_syscalls = true;
4577         }
4578 
4579         err = 0;
4580 
4581         if (lists[0]) {
4582                 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4583                                                "event selector. use 'perf list' to list available events",
4584                                                parse_events_option);
4585                 err = parse_events_option(&o, lists[0], 0);
4586         }
4587 out:
4588         if (sep)
4589                 *sep = ',';
4590 
4591         return err;
4592 }
4593 
4594 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4595 {
4596         struct trace *trace = opt->value;
4597 
4598         if (!list_empty(&trace->evlist->core.entries))
4599                 return parse_cgroups(opt, str, unset);
4600 
4601         trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4602 
4603         return 0;
4604 }
4605 
4606 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
4607 {
4608         if (trace->bpf_obj == NULL)
4609                 return NULL;
4610 
4611         return bpf_object__find_map_by_name(trace->bpf_obj, name);
4612 }
4613 
4614 static void trace__set_bpf_map_filtered_pids(struct trace *trace)
4615 {
4616         trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
4617 }
4618 
4619 static void trace__set_bpf_map_syscalls(struct trace *trace)
4620 {
4621         trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
4622         trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
4623         trace->syscalls.prog_array.sys_exit  = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
4624 }
4625 
4626 static int trace__config(const char *var, const char *value, void *arg)
4627 {
4628         struct trace *trace = arg;
4629         int err = 0;
4630 
4631         if (!strcmp(var, "trace.add_events")) {
4632                 trace->perfconfig_events = strdup(value);
4633                 if (trace->perfconfig_events == NULL) {
4634                         pr_err("Not enough memory for %s\n", "trace.add_events");
4635                         return -1;
4636                 }
4637         } else if (!strcmp(var, "trace.show_timestamp")) {
4638                 trace->show_tstamp = perf_config_bool(var, value);
4639         } else if (!strcmp(var, "trace.show_duration")) {
4640                 trace->show_duration = perf_config_bool(var, value);
4641         } else if (!strcmp(var, "trace.show_arg_names")) {
4642                 trace->show_arg_names = perf_config_bool(var, value);
4643                 if (!trace->show_arg_names)
4644                         trace->show_zeros = true;
4645         } else if (!strcmp(var, "trace.show_zeros")) {
4646                 bool new_show_zeros = perf_config_bool(var, value);
4647                 if (!trace->show_arg_names && !new_show_zeros) {
4648                         pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4649                         goto out;
4650                 }
4651                 trace->show_zeros = new_show_zeros;
4652         } else if (!strcmp(var, "trace.show_prefix")) {
4653                 trace->show_string_prefix = perf_config_bool(var, value);
4654         } else if (!strcmp(var, "trace.no_inherit")) {
4655                 trace->opts.no_inherit = perf_config_bool(var, value);
4656         } else if (!strcmp(var, "trace.args_alignment")) {
4657                 int args_alignment = 0;
4658                 if (perf_config_int(&args_alignment, var, value) == 0)
4659                         trace->args_alignment = args_alignment;
4660         } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4661                 if (strcasecmp(value, "libtraceevent") == 0)
4662                         trace->libtraceevent_print = true;
4663                 else if (strcasecmp(value, "libbeauty") == 0)
4664                         trace->libtraceevent_print = false;
4665         }
4666 out:
4667         return err;
4668 }
4669 
4670 int cmd_trace(int argc, const char **argv)
4671 {
4672         const char *trace_usage[] = {
4673                 "perf trace [<options>] [<command>]",
4674                 "perf trace [<options>] -- <command> [<options>]",
4675                 "perf trace record [<options>] [<command>]",
4676                 "perf trace record [<options>] -- <command> [<options>]",
4677                 NULL
4678         };
4679         struct trace trace = {
4680                 .opts = {
4681                         .target = {
4682                                 .uid       = UINT_MAX,
4683                                 .uses_mmap = true,
4684                         },
4685                         .user_freq     = UINT_MAX,
4686                         .user_interval = ULLONG_MAX,
4687                         .no_buffering  = true,
4688                         .mmap_pages    = UINT_MAX,
4689                 },
4690                 .output = stderr,
4691                 .show_comm = true,
4692                 .show_tstamp = true,
4693                 .show_duration = true,
4694                 .show_arg_names = true,
4695                 .args_alignment = 70,
4696                 .trace_syscalls = false,
4697                 .kernel_syscallchains = false,
4698                 .max_stack = UINT_MAX,
4699                 .max_events = ULONG_MAX,
4700         };
4701         const char *map_dump_str = NULL;
4702         const char *output_name = NULL;
4703         const struct option trace_options[] = {
4704         OPT_CALLBACK('e', "event", &trace, "event",
4705                      "event/syscall selector. use 'perf list' to list available events",
4706                      trace__parse_events_option),
4707         OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4708                      "event filter", parse_filter),
4709         OPT_BOOLEAN(0, "comm", &trace.show_comm,
4710                     "show the thread COMM next to its id"),
4711         OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4712         OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4713                      trace__parse_events_option),
4714         OPT_STRING('o', "output", &output_name, "file", "output file name"),
4715         OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4716         OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4717                     "trace events on existing process id"),
4718         OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4719                     "trace events on existing thread id"),
4720         OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4721                      "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4722         OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4723                     "system-wide collection from all CPUs"),
4724         OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4725                     "list of cpus to monitor"),
4726         OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4727                     "child tasks do not inherit counters"),
4728         OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4729                      "number of mmap data pages",
4730                      perf_evlist__parse_mmap_pages),
4731         OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4732                    "user to profile"),
4733         OPT_CALLBACK(0, "duration", &trace, "float",
4734                      "show only events with duration > N.M ms",
4735                      trace__set_duration),
4736 #ifdef HAVE_LIBBPF_SUPPORT
4737         OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4738 #endif
4739         OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4740         OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4741         OPT_BOOLEAN('T', "time", &trace.full_time,
4742                     "Show full timestamp, not time relative to first start"),
4743         OPT_BOOLEAN(0, "failure", &trace.failure_only,
4744                     "Show only syscalls that failed"),
4745         OPT_BOOLEAN('s', "summary", &trace.summary_only,
4746                     "Show only syscall summary with statistics"),
4747         OPT_BOOLEAN('S', "with-summary", &trace.summary,
4748                     "Show all syscalls and summary with statistics"),
4749         OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4750                     "Show errno stats per syscall, use with -s or -S"),
4751         OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4752                      "Trace pagefaults", parse_pagefaults, "maj"),
4753         OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4754         OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4755         OPT_CALLBACK(0, "call-graph", &trace.opts,
4756                      "record_mode[,record_size]", record_callchain_help,
4757                      &record_parse_callchain_opt),
4758         OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4759                     "Use libtraceevent to print the tracepoint arguments."),
4760         OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4761                     "Show the kernel callchains on the syscall exit path"),
4762         OPT_ULONG(0, "max-events", &trace.max_events,
4763                 "Set the maximum number of events to print, exit after that is reached. "),
4764         OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4765                      "Set the minimum stack depth when parsing the callchain, "
4766                      "anything below the specified depth will be ignored."),
4767         OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4768                      "Set the maximum stack depth when parsing the callchain, "
4769                      "anything beyond the specified depth will be ignored. "
4770                      "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4771         OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4772                         "Sort batch of events before processing, use if getting out of order events"),
4773         OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4774                         "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4775         OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4776                         "per thread proc mmap processing timeout in ms"),
4777         OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4778                      trace__parse_cgroups),
4779         OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
4780                      "ms to wait before starting measurement after program "
4781                      "start"),
4782         OPTS_EVSWITCH(&trace.evswitch),
4783         OPT_END()
4784         };
4785         bool __maybe_unused max_stack_user_set = true;
4786         bool mmap_pages_user_set = true;
4787         struct evsel *evsel;
4788         const char * const trace_subcommands[] = { "record", NULL };
4789         int err = -1;
4790         char bf[BUFSIZ];
4791 
4792         signal(SIGSEGV, sighandler_dump_stack);
4793         signal(SIGFPE, sighandler_dump_stack);
4794 
4795         trace.evlist = evlist__new();
4796         trace.sctbl = syscalltbl__new();
4797 
4798         if (trace.evlist == NULL || trace.sctbl == NULL) {
4799                 pr_err("Not enough memory to run!\n");
4800                 err = -ENOMEM;
4801                 goto out;
4802         }
4803 
4804         /*
4805          * Parsing .perfconfig may entail creating a BPF event, that may need
4806          * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4807          * is too small. This affects just this process, not touching the
4808          * global setting. If it fails we'll get something in 'perf trace -v'
4809          * to help diagnose the problem.
4810          */
4811         rlimit__bump_memlock();
4812 
4813         err = perf_config(trace__config, &trace);
4814         if (err)
4815                 goto out;
4816 
4817         argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4818                                  trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4819 
4820         /*
4821          * Here we already passed thru trace__parse_events_option() and it has
4822          * already figured out if -e syscall_name, if not but if --event
4823          * foo:bar was used, the user is interested _just_ in those, say,
4824          * tracepoint events, not in the strace-like syscall-name-based mode.
4825          *
4826          * This is important because we need to check if strace-like mode is
4827          * needed to decided if we should filter out the eBPF
4828          * __augmented_syscalls__ code, if it is in the mix, say, via
4829          * .perfconfig trace.add_events, and filter those out.
4830          */
4831         if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4832             trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4833                 trace.trace_syscalls = true;
4834         }
4835         /*
4836          * Now that we have --verbose figured out, lets see if we need to parse
4837          * events from .perfconfig, so that if those events fail parsing, say some
4838          * BPF program fails, then we'll be able to use --verbose to see what went
4839          * wrong in more detail.
4840          */
4841         if (trace.perfconfig_events != NULL) {
4842                 struct parse_events_error parse_err;
4843 
4844                 bzero(&parse_err, sizeof(parse_err));
4845                 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4846                 if (err) {
4847                         parse_events_print_error(&parse_err, trace.perfconfig_events);
4848                         goto out;
4849                 }
4850         }
4851 
4852         if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4853                 usage_with_options_msg(trace_usage, trace_options,
4854                                        "cgroup monitoring only available in system-wide mode");
4855         }
4856 
4857         evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4858         if (IS_ERR(evsel)) {
4859                 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4860                 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4861                 goto out;
4862         }
4863 
4864         if (evsel) {
4865                 trace.syscalls.events.augmented = evsel;
4866 
4867                 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4868                 if (evsel == NULL) {
4869                         pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4870                         goto out;
4871                 }
4872 
4873                 if (evsel->bpf_obj == NULL) {
4874                         pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4875                         goto out;
4876                 }
4877 
4878                 trace.bpf_obj = evsel->bpf_obj;
4879 
4880                 /*
4881                  * If we have _just_ the augmenter event but don't have a
4882                  * explicit --syscalls, then assume we want all strace-like
4883                  * syscalls:
4884                  */
4885                 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4886                         trace.trace_syscalls = true;
4887                 /*
4888                  * So, if we have a syscall augmenter, but trace_syscalls, aka
4889                  * strace-like syscall tracing is not set, then we need to trow
4890                  * away the augmenter, i.e. all the events that were created
4891                  * from that BPF object file.
4892                  *
4893                  * This is more to fix the current .perfconfig trace.add_events
4894                  * style of setting up the strace-like eBPF based syscall point
4895                  * payload augmenter.
4896                  *
4897                  * All this complexity will be avoided by adding an alternative
4898                  * to trace.add_events in the form of
4899                  * trace.bpf_augmented_syscalls, that will be only parsed if we
4900                  * need it.
4901                  *
4902                  * .perfconfig trace.add_events is still useful if we want, for
4903                  * instance, have msr_write.msr in some .perfconfig profile based
4904                  * 'perf trace --config determinism.profile' mode, where for some
4905                  * particular goal/workload type we want a set of events and
4906                  * output mode (with timings, etc) instead of having to add
4907                  * all via the command line.
4908                  *
4909                  * Also --config to specify an alternate .perfconfig file needs
4910                  * to be implemented.
4911                  */
4912                 if (!trace.trace_syscalls) {
4913                         trace__delete_augmented_syscalls(&trace);
4914                 } else {
4915                         trace__set_bpf_map_filtered_pids(&trace);
4916                         trace__set_bpf_map_syscalls(&trace);
4917                         trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4918                 }
4919         }
4920 
4921         err = bpf__setup_stdout(trace.evlist);
4922         if (err) {
4923                 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4924                 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4925                 goto out;
4926         }
4927 
4928         err = -1;
4929 
4930         if (map_dump_str) {
4931                 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4932                 if (trace.dump.map == NULL) {
4933                         pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4934                         goto out;
4935                 }
4936         }
4937 
4938         if (trace.trace_pgfaults) {
4939                 trace.opts.sample_address = true;
4940                 trace.opts.sample_time = true;
4941         }
4942 
4943         if (trace.opts.mmap_pages == UINT_MAX)
4944                 mmap_pages_user_set = false;
4945 
4946         if (trace.max_stack == UINT_MAX) {
4947                 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4948                 max_stack_user_set = false;
4949         }
4950 
4951 #ifdef HAVE_DWARF_UNWIND_SUPPORT
4952         if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4953                 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4954         }
4955 #endif
4956 
4957         if (callchain_param.enabled) {
4958                 if (!mmap_pages_user_set && geteuid() == 0)
4959                         trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4960 
4961                 symbol_conf.use_callchain = true;
4962         }
4963 
4964         if (trace.evlist->core.nr_entries > 0) {
4965                 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
4966                 if (evlist__set_syscall_tp_fields(trace.evlist)) {
4967                         perror("failed to set syscalls:* tracepoint fields");
4968                         goto out;
4969                 }
4970         }
4971 
4972         if (trace.sort_events) {
4973                 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
4974                 ordered_events__set_copy_on_queue(&trace.oe.data, true);
4975         }
4976 
4977         /*
4978          * If we are augmenting syscalls, then combine what we put in the
4979          * __augmented_syscalls__ BPF map with what is in the
4980          * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4981          * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4982          *
4983          * We'll switch to look at two BPF maps, one for sys_enter and the
4984          * other for sys_exit when we start augmenting the sys_exit paths with
4985          * buffers that are being copied from kernel to userspace, think 'read'
4986          * syscall.
4987          */
4988         if (trace.syscalls.events.augmented) {
4989                 evlist__for_each_entry(trace.evlist, evsel) {
4990                         bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4991 
4992                         if (raw_syscalls_sys_exit) {
4993                                 trace.raw_augmented_syscalls = true;
4994                                 goto init_augmented_syscall_tp;
4995                         }
4996 
4997                         if (trace.syscalls.events.augmented->priv == NULL &&
4998                             strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) {
4999                                 struct evsel *augmented = trace.syscalls.events.augmented;
5000                                 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) ||
5001                                     perf_evsel__init_augmented_syscall_tp_args(augmented))
5002                                         goto out;
5003                                 /*
5004                                  * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5005                                  * Above we made sure we can get from the payload the tp fields
5006                                  * that we get from syscalls:sys_enter tracefs format file.
5007                                  */
5008                                 augmented->handler = trace__sys_enter;
5009                                 /*
5010                                  * Now we do the same for the *syscalls:sys_enter event so that
5011                                  * if we handle it directly, i.e. if the BPF prog returns 0 so
5012                                  * as not to filter it, then we'll handle it just like we would
5013                                  * for the BPF_OUTPUT one:
5014                                  */
5015                                 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) ||
5016                                     perf_evsel__init_augmented_syscall_tp_args(evsel))
5017                                         goto out;
5018                                 evsel->handler = trace__sys_enter;
5019                         }
5020 
5021                         if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) {
5022                                 struct syscall_tp *sc;
5023 init_augmented_syscall_tp:
5024                                 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel))
5025                                         goto out;
5026                                 sc = __evsel__syscall_tp(evsel);
5027                                 /*
5028                                  * For now with BPF raw_augmented we hook into
5029                                  * raw_syscalls:sys_enter and there we get all
5030                                  * 6 syscall args plus the tracepoint common
5031                                  * fields and the syscall_nr (another long).
5032                                  * So we check if that is the case and if so
5033                                  * don't look after the sc->args_size but
5034                                  * always after the full raw_syscalls:sys_enter
5035                                  * payload, which is fixed.
5036                                  *
5037                                  * We'll revisit this later to pass
5038                                  * s->args_size to the BPF augmenter (now
5039                                  * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5040                                  * so that it copies only what we need for each
5041                                  * syscall, like what happens when we use
5042                                  * syscalls:sys_enter_NAME, so that we reduce
5043                                  * the kernel/userspace traffic to just what is
5044                                  * needed for each syscall.
5045                                  */
5046                                 if (trace.raw_augmented_syscalls)
5047                                         trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5048                                 perf_evsel__init_augmented_syscall_tp_ret(evsel);
5049                                 evsel->handler = trace__sys_exit;
5050                         }
5051                 }
5052         }
5053 
5054         if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5055                 return trace__record(&trace, argc-1, &argv[1]);
5056 
5057         /* Using just --errno-summary will trigger --summary */
5058         if (trace.errno_summary && !trace.summary && !trace.summary_only)
5059                 trace.summary_only = true;
5060 
5061         /* summary_only implies summary option, but don't overwrite summary if set */
5062         if (trace.summary_only)
5063                 trace.summary = trace.summary_only;
5064 
5065         if (output_name != NULL) {
5066                 err = trace__open_output(&trace, output_name);
5067                 if (err < 0) {
5068                         perror("failed to create output file");
5069                         goto out;
5070                 }
5071         }
5072 
5073         err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5074         if (err)
5075                 goto out_close;
5076 
5077         err = target__validate(&trace.opts.target);
5078         if (err) {
5079                 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5080                 fprintf(trace.output, "%s", bf);
5081                 goto out_close;
5082         }
5083 
5084         err = target__parse_uid(&trace.opts.target);
5085         if (err) {
5086                 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5087                 fprintf(trace.output, "%s", bf);
5088                 goto out_close;
5089         }
5090 
5091         if (!argc && target__none(&trace.opts.target))
5092                 trace.opts.target.system_wide = true;
5093 
5094         if (input_name)
5095                 err = trace__replay(&trace);
5096         else