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 <api/fs/tracing_path.h> 19 #ifdef HAVE_LIBBPF_SUPPORT 20 #include <bpf/bpf.h> 21 #include <bpf/libbpf.h> 22 #ifdef HAVE_BPF_SKEL 23 #include "bpf_skel/augmented_raw_syscalls.skel.h" 24 #endif 25 #endif 26 #include "util/bpf_map.h" 27 #include "util/rlimit.h" 28 #include "builtin.h" 29 #include "util/cgroup.h" 30 #include "util/color.h" 31 #include "util/config.h" 32 #include "util/debug.h" 33 #include "util/dso.h" 34 #include "util/env.h" 35 #include "util/event.h" 36 #include "util/evsel.h" 37 #include "util/evsel_fprintf.h" 38 #include "util/synthetic-events.h" 39 #include "util/evlist.h" 40 #include "util/evswitch.h" 41 #include "util/mmap.h" 42 #include <subcmd/pager.h> 43 #include <subcmd/exec-cmd.h> 44 #include "util/machine.h" 45 #include "util/map.h" 46 #include "util/symbol.h" 47 #include "util/path.h" 48 #include "util/session.h" 49 #include "util/thread.h" 50 #include <subcmd/parse-options.h> 51 #include "util/strlist.h" 52 #include "util/intlist.h" 53 #include "util/thread_map.h" 54 #include "util/stat.h" 55 #include "util/tool.h" 56 #include "util/util.h" 57 #include "trace/beauty/beauty.h" 58 #include "trace-event.h" 59 #include "util/parse-events.h" 60 #include "util/tracepoint.h" 61 #include "callchain.h" 62 #include "print_binary.h" 63 #include "string2.h" 64 #include "syscalltbl.h" 65 #include "rb_resort.h" 66 #include "../perf.h" 67 68 #include <errno.h> 69 #include <inttypes.h> 70 #include <poll.h> 71 #include <signal.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <linux/err.h> 75 #include <linux/filter.h> 76 #include <linux/kernel.h> 77 #include <linux/list_sort.h> 78 #include <linux/random.h> 79 #include <linux/stringify.h> 80 #include <linux/time64.h> 81 #include <linux/zalloc.h> 82 #include <fcntl.h> 83 #include <sys/sysmacros.h> 84 85 #include <linux/ctype.h> 86 #include <perf/mmap.h> 87 88 #ifdef HAVE_LIBTRACEEVENT 89 #include <traceevent/event-parse.h> 90 #endif 91 92 #ifndef O_CLOEXEC 93 # define O_CLOEXEC 02000000 94 #endif 95 96 #ifndef F_LINUX_SPECIFIC_BASE 97 # define F_LINUX_SPECIFIC_BASE 1024 98 #endif 99 100 #define RAW_SYSCALL_ARGS_NUM 6 101 102 /* 103 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 104 */ 105 struct syscall_arg_fmt { 106 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 107 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); 108 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 109 void *parm; 110 const char *name; 111 u16 nr_entries; // for arrays 112 bool show_zero; 113 }; 114 115 struct syscall_fmt { 116 const char *name; 117 const char *alias; 118 struct { 119 const char *sys_enter, 120 *sys_exit; 121 } bpf_prog_name; 122 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM]; 123 u8 nr_args; 124 bool errpid; 125 bool timeout; 126 bool hexret; 127 }; 128 129 struct trace { 130 struct perf_tool tool; 131 struct syscalltbl *sctbl; 132 struct { 133 struct syscall *table; 134 struct { 135 struct evsel *sys_enter, 136 *sys_exit, 137 *bpf_output; 138 } events; 139 } syscalls; 140 #ifdef HAVE_BPF_SKEL 141 struct augmented_raw_syscalls_bpf *skel; 142 #endif 143 struct record_opts opts; 144 struct evlist *evlist; 145 struct machine *host; 146 struct thread *current; 147 struct cgroup *cgroup; 148 u64 base_time; 149 FILE *output; 150 unsigned long nr_events; 151 unsigned long nr_events_printed; 152 unsigned long max_events; 153 struct evswitch evswitch; 154 struct strlist *ev_qualifier; 155 struct { 156 size_t nr; 157 int *entries; 158 } ev_qualifier_ids; 159 struct { 160 size_t nr; 161 pid_t *entries; 162 struct bpf_map *map; 163 } filter_pids; 164 double duration_filter; 165 double runtime_ms; 166 struct { 167 u64 vfs_getname, 168 proc_getname; 169 } stats; 170 unsigned int max_stack; 171 unsigned int min_stack; 172 int raw_augmented_syscalls_args_size; 173 bool raw_augmented_syscalls; 174 bool fd_path_disabled; 175 bool sort_events; 176 bool not_ev_qualifier; 177 bool live; 178 bool full_time; 179 bool sched; 180 bool multiple_threads; 181 bool summary; 182 bool summary_only; 183 bool errno_summary; 184 bool failure_only; 185 bool show_comm; 186 bool print_sample; 187 bool show_tool_stats; 188 bool trace_syscalls; 189 bool libtraceevent_print; 190 bool kernel_syscallchains; 191 s16 args_alignment; 192 bool show_tstamp; 193 bool show_duration; 194 bool show_zeros; 195 bool show_arg_names; 196 bool show_string_prefix; 197 bool force; 198 bool vfs_getname; 199 int trace_pgfaults; 200 char *perfconfig_events; 201 struct { 202 struct ordered_events data; 203 u64 last; 204 } oe; 205 }; 206 207 struct tp_field { 208 int offset; 209 union { 210 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 211 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 212 }; 213 }; 214 215 #define TP_UINT_FIELD(bits) \ 216 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 217 { \ 218 u##bits value; \ 219 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 220 return value; \ 221 } 222 223 TP_UINT_FIELD(8); 224 TP_UINT_FIELD(16); 225 TP_UINT_FIELD(32); 226 TP_UINT_FIELD(64); 227 228 #define TP_UINT_FIELD__SWAPPED(bits) \ 229 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 230 { \ 231 u##bits value; \ 232 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 233 return bswap_##bits(value);\ 234 } 235 236 TP_UINT_FIELD__SWAPPED(16); 237 TP_UINT_FIELD__SWAPPED(32); 238 TP_UINT_FIELD__SWAPPED(64); 239 240 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 241 { 242 field->offset = offset; 243 244 switch (size) { 245 case 1: 246 field->integer = tp_field__u8; 247 break; 248 case 2: 249 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 250 break; 251 case 4: 252 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 253 break; 254 case 8: 255 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 256 break; 257 default: 258 return -1; 259 } 260 261 return 0; 262 } 263 264 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 265 { 266 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 267 } 268 269 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 270 { 271 return sample->raw_data + field->offset; 272 } 273 274 static int __tp_field__init_ptr(struct tp_field *field, int offset) 275 { 276 field->offset = offset; 277 field->pointer = tp_field__ptr; 278 return 0; 279 } 280 281 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 282 { 283 return __tp_field__init_ptr(field, format_field->offset); 284 } 285 286 struct syscall_tp { 287 struct tp_field id; 288 union { 289 struct tp_field args, ret; 290 }; 291 }; 292 293 /* 294 * The evsel->priv as used by 'perf trace' 295 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME 296 * fmt: for all the other tracepoints 297 */ 298 struct evsel_trace { 299 struct syscall_tp sc; 300 struct syscall_arg_fmt *fmt; 301 }; 302 303 static struct evsel_trace *evsel_trace__new(void) 304 { 305 return zalloc(sizeof(struct evsel_trace)); 306 } 307 308 static void evsel_trace__delete(struct evsel_trace *et) 309 { 310 if (et == NULL) 311 return; 312 313 zfree(&et->fmt); 314 free(et); 315 } 316 317 /* 318 * Used with raw_syscalls:sys_{enter,exit} and with the 319 * syscalls:sys_{enter,exit}_SYSCALL tracepoints 320 */ 321 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) 322 { 323 struct evsel_trace *et = evsel->priv; 324 325 return &et->sc; 326 } 327 328 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) 329 { 330 if (evsel->priv == NULL) { 331 evsel->priv = evsel_trace__new(); 332 if (evsel->priv == NULL) 333 return NULL; 334 } 335 336 return __evsel__syscall_tp(evsel); 337 } 338 339 /* 340 * Used with all the other tracepoints. 341 */ 342 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) 343 { 344 struct evsel_trace *et = evsel->priv; 345 346 return et->fmt; 347 } 348 349 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) 350 { 351 struct evsel_trace *et = evsel->priv; 352 353 if (evsel->priv == NULL) { 354 et = evsel->priv = evsel_trace__new(); 355 356 if (et == NULL) 357 return NULL; 358 } 359 360 if (et->fmt == NULL) { 361 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); 362 if (et->fmt == NULL) 363 goto out_delete; 364 } 365 366 return __evsel__syscall_arg_fmt(evsel); 367 368 out_delete: 369 evsel_trace__delete(evsel->priv); 370 evsel->priv = NULL; 371 return NULL; 372 } 373 374 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) 375 { 376 struct tep_format_field *format_field = evsel__field(evsel, name); 377 378 if (format_field == NULL) 379 return -1; 380 381 return tp_field__init_uint(field, format_field, evsel->needs_swap); 382 } 383 384 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 385 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 386 evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 387 388 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) 389 { 390 struct tep_format_field *format_field = evsel__field(evsel, name); 391 392 if (format_field == NULL) 393 return -1; 394 395 return tp_field__init_ptr(field, format_field); 396 } 397 398 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 399 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 400 evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 401 402 static void evsel__delete_priv(struct evsel *evsel) 403 { 404 zfree(&evsel->priv); 405 evsel__delete(evsel); 406 } 407 408 static int evsel__init_syscall_tp(struct evsel *evsel) 409 { 410 struct syscall_tp *sc = evsel__syscall_tp(evsel); 411 412 if (sc != NULL) { 413 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 414 evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 415 return -ENOENT; 416 417 return 0; 418 } 419 420 return -ENOMEM; 421 } 422 423 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) 424 { 425 struct syscall_tp *sc = evsel__syscall_tp(evsel); 426 427 if (sc != NULL) { 428 struct tep_format_field *syscall_id = evsel__field(tp, "id"); 429 if (syscall_id == NULL) 430 syscall_id = evsel__field(tp, "__syscall_nr"); 431 if (syscall_id == NULL || 432 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 433 return -EINVAL; 434 435 return 0; 436 } 437 438 return -ENOMEM; 439 } 440 441 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) 442 { 443 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 444 445 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 446 } 447 448 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) 449 { 450 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 451 452 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 453 } 454 455 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) 456 { 457 if (evsel__syscall_tp(evsel) != NULL) { 458 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 459 return -ENOENT; 460 461 evsel->handler = handler; 462 return 0; 463 } 464 465 return -ENOMEM; 466 } 467 468 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 469 { 470 struct evsel *evsel = evsel__newtp("raw_syscalls", direction); 471 472 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 473 if (IS_ERR(evsel)) 474 evsel = evsel__newtp("syscalls", direction); 475 476 if (IS_ERR(evsel)) 477 return NULL; 478 479 if (evsel__init_raw_syscall_tp(evsel, handler)) 480 goto out_delete; 481 482 return evsel; 483 484 out_delete: 485 evsel__delete_priv(evsel); 486 return NULL; 487 } 488 489 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 490 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 491 fields->name.integer(&fields->name, sample); }) 492 493 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 494 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 495 fields->name.pointer(&fields->name, sample); }) 496 497 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) 498 { 499 int idx = val - sa->offset; 500 501 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 502 size_t printed = scnprintf(bf, size, intfmt, val); 503 if (show_suffix) 504 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 505 return printed; 506 } 507 508 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); 509 } 510 511 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 512 { 513 int idx = val - sa->offset; 514 515 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 516 size_t printed = scnprintf(bf, size, intfmt, val); 517 if (show_prefix) 518 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 519 return printed; 520 } 521 522 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 523 } 524 525 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 526 const char *intfmt, 527 struct syscall_arg *arg) 528 { 529 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 530 } 531 532 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 533 struct syscall_arg *arg) 534 { 535 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 536 } 537 538 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 539 540 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 541 { 542 return strarray__strtoul(arg->parm, bf, size, ret); 543 } 544 545 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 546 { 547 return strarray__strtoul_flags(arg->parm, bf, size, ret); 548 } 549 550 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 551 { 552 return strarrays__strtoul(arg->parm, bf, size, ret); 553 } 554 555 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 556 { 557 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 558 } 559 560 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 561 { 562 size_t printed; 563 int i; 564 565 for (i = 0; i < sas->nr_entries; ++i) { 566 struct strarray *sa = sas->entries[i]; 567 int idx = val - sa->offset; 568 569 if (idx >= 0 && idx < sa->nr_entries) { 570 if (sa->entries[idx] == NULL) 571 break; 572 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 573 } 574 } 575 576 printed = scnprintf(bf, size, intfmt, val); 577 if (show_prefix) 578 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 579 return printed; 580 } 581 582 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) 583 { 584 int i; 585 586 for (i = 0; i < sa->nr_entries; ++i) { 587 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { 588 *ret = sa->offset + i; 589 return true; 590 } 591 } 592 593 return false; 594 } 595 596 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) 597 { 598 u64 val = 0; 599 char *tok = bf, *sep, *end; 600 601 *ret = 0; 602 603 while (size != 0) { 604 int toklen = size; 605 606 sep = memchr(tok, '|', size); 607 if (sep != NULL) { 608 size -= sep - tok + 1; 609 610 end = sep - 1; 611 while (end > tok && isspace(*end)) 612 --end; 613 614 toklen = end - tok + 1; 615 } 616 617 while (isspace(*tok)) 618 ++tok; 619 620 if (isalpha(*tok) || *tok == '_') { 621 if (!strarray__strtoul(sa, tok, toklen, &val)) 622 return false; 623 } else 624 val = strtoul(tok, NULL, 0); 625 626 *ret |= (1 << (val - 1)); 627 628 if (sep == NULL) 629 break; 630 tok = sep + 1; 631 } 632 633 return true; 634 } 635 636 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) 637 { 638 int i; 639 640 for (i = 0; i < sas->nr_entries; ++i) { 641 struct strarray *sa = sas->entries[i]; 642 643 if (strarray__strtoul(sa, bf, size, ret)) 644 return true; 645 } 646 647 return false; 648 } 649 650 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 651 struct syscall_arg *arg) 652 { 653 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 654 } 655 656 #ifndef AT_FDCWD 657 #define AT_FDCWD -100 658 #endif 659 660 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 661 struct syscall_arg *arg) 662 { 663 int fd = arg->val; 664 const char *prefix = "AT_FD"; 665 666 if (fd == AT_FDCWD) 667 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 668 669 return syscall_arg__scnprintf_fd(bf, size, arg); 670 } 671 672 #define SCA_FDAT syscall_arg__scnprintf_fd_at 673 674 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 675 struct syscall_arg *arg); 676 677 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 678 679 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 680 { 681 return scnprintf(bf, size, "%#lx", arg->val); 682 } 683 684 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 685 { 686 if (arg->val == 0) 687 return scnprintf(bf, size, "NULL"); 688 return syscall_arg__scnprintf_hex(bf, size, arg); 689 } 690 691 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 692 { 693 return scnprintf(bf, size, "%d", arg->val); 694 } 695 696 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 697 { 698 return scnprintf(bf, size, "%ld", arg->val); 699 } 700 701 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) 702 { 703 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can 704 // fill missing comms using thread__set_comm()... 705 // here or in a special syscall_arg__scnprintf_pid_sched_tp... 706 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); 707 } 708 709 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array 710 711 static const char *bpf_cmd[] = { 712 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 713 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", 714 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", 715 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", 716 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", 717 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", 718 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", 719 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", 720 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", 721 "LINK_DETACH", "PROG_BIND_MAP", 722 }; 723 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 724 725 static const char *fsmount_flags[] = { 726 [1] = "CLOEXEC", 727 }; 728 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 729 730 #include "trace/beauty/generated/fsconfig_arrays.c" 731 732 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 733 734 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 735 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 736 737 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 738 static DEFINE_STRARRAY(itimers, "ITIMER_"); 739 740 static const char *keyctl_options[] = { 741 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 742 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 743 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 744 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 745 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 746 }; 747 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 748 749 static const char *whences[] = { "SET", "CUR", "END", 750 #ifdef SEEK_DATA 751 "DATA", 752 #endif 753 #ifdef SEEK_HOLE 754 "HOLE", 755 #endif 756 }; 757 static DEFINE_STRARRAY(whences, "SEEK_"); 758 759 static const char *fcntl_cmds[] = { 760 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 761 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 762 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 763 "GETOWNER_UIDS", 764 }; 765 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 766 767 static const char *fcntl_linux_specific_cmds[] = { 768 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 769 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 770 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 771 }; 772 773 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 774 775 static struct strarray *fcntl_cmds_arrays[] = { 776 &strarray__fcntl_cmds, 777 &strarray__fcntl_linux_specific_cmds, 778 }; 779 780 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 781 782 static const char *rlimit_resources[] = { 783 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 784 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 785 "RTTIME", 786 }; 787 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 788 789 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 790 static DEFINE_STRARRAY(sighow, "SIG_"); 791 792 static const char *clockid[] = { 793 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 794 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 795 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 796 }; 797 static DEFINE_STRARRAY(clockid, "CLOCK_"); 798 799 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 800 struct syscall_arg *arg) 801 { 802 bool show_prefix = arg->show_string_prefix; 803 const char *suffix = "_OK"; 804 size_t printed = 0; 805 int mode = arg->val; 806 807 if (mode == F_OK) /* 0 */ 808 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 809 #define P_MODE(n) \ 810 if (mode & n##_OK) { \ 811 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 812 mode &= ~n##_OK; \ 813 } 814 815 P_MODE(R); 816 P_MODE(W); 817 P_MODE(X); 818 #undef P_MODE 819 820 if (mode) 821 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 822 823 return printed; 824 } 825 826 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 827 828 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 829 struct syscall_arg *arg); 830 831 #define SCA_FILENAME syscall_arg__scnprintf_filename 832 833 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 834 struct syscall_arg *arg) 835 { 836 bool show_prefix = arg->show_string_prefix; 837 const char *prefix = "O_"; 838 int printed = 0, flags = arg->val; 839 840 #define P_FLAG(n) \ 841 if (flags & O_##n) { \ 842 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 843 flags &= ~O_##n; \ 844 } 845 846 P_FLAG(CLOEXEC); 847 P_FLAG(NONBLOCK); 848 #undef P_FLAG 849 850 if (flags) 851 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 852 853 return printed; 854 } 855 856 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 857 858 #ifndef GRND_NONBLOCK 859 #define GRND_NONBLOCK 0x0001 860 #endif 861 #ifndef GRND_RANDOM 862 #define GRND_RANDOM 0x0002 863 #endif 864 865 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 866 struct syscall_arg *arg) 867 { 868 bool show_prefix = arg->show_string_prefix; 869 const char *prefix = "GRND_"; 870 int printed = 0, flags = arg->val; 871 872 #define P_FLAG(n) \ 873 if (flags & GRND_##n) { \ 874 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 875 flags &= ~GRND_##n; \ 876 } 877 878 P_FLAG(RANDOM); 879 P_FLAG(NONBLOCK); 880 #undef P_FLAG 881 882 if (flags) 883 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 884 885 return printed; 886 } 887 888 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 889 890 #define STRARRAY(name, array) \ 891 { .scnprintf = SCA_STRARRAY, \ 892 .strtoul = STUL_STRARRAY, \ 893 .parm = &strarray__##array, } 894 895 #define STRARRAY_FLAGS(name, array) \ 896 { .scnprintf = SCA_STRARRAY_FLAGS, \ 897 .strtoul = STUL_STRARRAY_FLAGS, \ 898 .parm = &strarray__##array, } 899 900 #include "trace/beauty/arch_errno_names.c" 901 #include "trace/beauty/eventfd.c" 902 #include "trace/beauty/futex_op.c" 903 #include "trace/beauty/futex_val3.c" 904 #include "trace/beauty/mmap.c" 905 #include "trace/beauty/mode_t.c" 906 #include "trace/beauty/msg_flags.c" 907 #include "trace/beauty/open_flags.c" 908 #include "trace/beauty/perf_event_open.c" 909 #include "trace/beauty/pid.c" 910 #include "trace/beauty/sched_policy.c" 911 #include "trace/beauty/seccomp.c" 912 #include "trace/beauty/signum.c" 913 #include "trace/beauty/socket_type.c" 914 #include "trace/beauty/waitid_options.c" 915 916 static const struct syscall_fmt syscall_fmts[] = { 917 { .name = "access", 918 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 919 { .name = "arch_prctl", 920 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 921 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 922 { .name = "bind", 923 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 924 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, 925 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 926 { .name = "bpf", 927 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 928 { .name = "brk", .hexret = true, 929 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 930 { .name = "clock_gettime", 931 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 932 { .name = "clock_nanosleep", 933 .arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, }, 934 { .name = "clone", .errpid = true, .nr_args = 5, 935 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 936 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 937 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 938 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 939 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 940 { .name = "close", 941 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 942 { .name = "connect", 943 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 944 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, 945 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 946 { .name = "epoll_ctl", 947 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 948 { .name = "eventfd2", 949 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 950 { .name = "fchmodat", 951 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 952 { .name = "fchownat", 953 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 954 { .name = "fcntl", 955 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 956 .strtoul = STUL_STRARRAYS, 957 .parm = &strarrays__fcntl_cmds_arrays, 958 .show_zero = true, }, 959 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 960 { .name = "flock", 961 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 962 { .name = "fsconfig", 963 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 964 { .name = "fsmount", 965 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 966 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 967 { .name = "fspick", 968 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 969 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 970 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 971 { .name = "fstat", .alias = "newfstat", }, 972 { .name = "fstatat", .alias = "newfstatat", }, 973 { .name = "futex", 974 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 975 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 976 { .name = "futimesat", 977 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 978 { .name = "getitimer", 979 .arg = { [0] = STRARRAY(which, itimers), }, }, 980 { .name = "getpid", .errpid = true, }, 981 { .name = "getpgid", .errpid = true, }, 982 { .name = "getppid", .errpid = true, }, 983 { .name = "getrandom", 984 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 985 { .name = "getrlimit", 986 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 987 { .name = "getsockopt", 988 .arg = { [1] = STRARRAY(level, socket_level), }, }, 989 { .name = "gettid", .errpid = true, }, 990 { .name = "ioctl", 991 .arg = { 992 #if defined(__i386__) || defined(__x86_64__) 993 /* 994 * FIXME: Make this available to all arches. 995 */ 996 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 997 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 998 #else 999 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 1000 #endif 1001 { .name = "kcmp", .nr_args = 5, 1002 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 1003 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 1004 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 1005 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 1006 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 1007 { .name = "keyctl", 1008 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 1009 { .name = "kill", 1010 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1011 { .name = "linkat", 1012 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1013 { .name = "lseek", 1014 .arg = { [2] = STRARRAY(whence, whences), }, }, 1015 { .name = "lstat", .alias = "newlstat", }, 1016 { .name = "madvise", 1017 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1018 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 1019 { .name = "mkdirat", 1020 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1021 { .name = "mknodat", 1022 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1023 { .name = "mmap", .hexret = true, 1024 /* The standard mmap maps to old_mmap on s390x */ 1025 #if defined(__s390x__) 1026 .alias = "old_mmap", 1027 #endif 1028 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1029 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ 1030 .strtoul = STUL_STRARRAY_FLAGS, 1031 .parm = &strarray__mmap_flags, }, 1032 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 1033 { .name = "mount", 1034 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 1035 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 1036 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 1037 { .name = "move_mount", 1038 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 1039 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 1040 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 1041 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 1042 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 1043 { .name = "mprotect", 1044 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1045 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 1046 { .name = "mq_unlink", 1047 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 1048 { .name = "mremap", .hexret = true, 1049 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 1050 { .name = "name_to_handle_at", 1051 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1052 { .name = "nanosleep", 1053 .arg = { [0] = { .scnprintf = SCA_TIMESPEC, /* req */ }, }, }, 1054 { .name = "newfstatat", 1055 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1056 { .name = "open", 1057 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1058 { .name = "open_by_handle_at", 1059 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1060 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1061 { .name = "openat", 1062 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1063 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1064 { .name = "perf_event_open", 1065 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ }, 1066 [2] = { .scnprintf = SCA_INT, /* cpu */ }, 1067 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 1068 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 1069 { .name = "pipe2", 1070 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 1071 { .name = "pkey_alloc", 1072 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 1073 { .name = "pkey_free", 1074 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 1075 { .name = "pkey_mprotect", 1076 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1077 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1078 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 1079 { .name = "poll", .timeout = true, }, 1080 { .name = "ppoll", .timeout = true, }, 1081 { .name = "prctl", 1082 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ 1083 .strtoul = STUL_STRARRAY, 1084 .parm = &strarray__prctl_options, }, 1085 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 1086 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 1087 { .name = "pread", .alias = "pread64", }, 1088 { .name = "preadv", .alias = "pread", }, 1089 { .name = "prlimit64", 1090 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 1091 { .name = "pwrite", .alias = "pwrite64", }, 1092 { .name = "readlinkat", 1093 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1094 { .name = "recvfrom", 1095 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1096 { .name = "recvmmsg", 1097 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1098 { .name = "recvmsg", 1099 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1100 { .name = "renameat", 1101 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1102 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 1103 { .name = "renameat2", 1104 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1105 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 1106 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 1107 { .name = "rt_sigaction", 1108 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1109 { .name = "rt_sigprocmask", 1110 .arg = { [0] = STRARRAY(how, sighow), }, }, 1111 { .name = "rt_sigqueueinfo", 1112 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1113 { .name = "rt_tgsigqueueinfo", 1114 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1115 { .name = "sched_setscheduler", 1116 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 1117 { .name = "seccomp", 1118 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 1119 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 1120 { .name = "select", .timeout = true, }, 1121 { .name = "sendfile", .alias = "sendfile64", }, 1122 { .name = "sendmmsg", 1123 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1124 { .name = "sendmsg", 1125 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1126 { .name = "sendto", 1127 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 1128 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 1129 { .name = "set_tid_address", .errpid = true, }, 1130 { .name = "setitimer", 1131 .arg = { [0] = STRARRAY(which, itimers), }, }, 1132 { .name = "setrlimit", 1133 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 1134 { .name = "setsockopt", 1135 .arg = { [1] = STRARRAY(level, socket_level), }, }, 1136 { .name = "socket", 1137 .arg = { [0] = STRARRAY(family, socket_families), 1138 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1139 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1140 { .name = "socketpair", 1141 .arg = { [0] = STRARRAY(family, socket_families), 1142 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1143 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1144 { .name = "stat", .alias = "newstat", }, 1145 { .name = "statx", 1146 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 1147 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 1148 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 1149 { .name = "swapoff", 1150 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1151 { .name = "swapon", 1152 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1153 { .name = "symlinkat", 1154 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1155 { .name = "sync_file_range", 1156 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 1157 { .name = "tgkill", 1158 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1159 { .name = "tkill", 1160 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1161 { .name = "umount2", .alias = "umount", 1162 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 1163 { .name = "uname", .alias = "newuname", }, 1164 { .name = "unlinkat", 1165 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1166 { .name = "utimensat", 1167 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 1168 { .name = "wait4", .errpid = true, 1169 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1170 { .name = "waitid", .errpid = true, 1171 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1172 }; 1173 1174 static int syscall_fmt__cmp(const void *name, const void *fmtp) 1175 { 1176 const struct syscall_fmt *fmt = fmtp; 1177 return strcmp(name, fmt->name); 1178 } 1179 1180 static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts, 1181 const int nmemb, 1182 const char *name) 1183 { 1184 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 1185 } 1186 1187 static const struct syscall_fmt *syscall_fmt__find(const char *name) 1188 { 1189 const int nmemb = ARRAY_SIZE(syscall_fmts); 1190 return __syscall_fmt__find(syscall_fmts, nmemb, name); 1191 } 1192 1193 static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts, 1194 const int nmemb, const char *alias) 1195 { 1196 int i; 1197 1198 for (i = 0; i < nmemb; ++i) { 1199 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) 1200 return &fmts[i]; 1201 } 1202 1203 return NULL; 1204 } 1205 1206 static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 1207 { 1208 const int nmemb = ARRAY_SIZE(syscall_fmts); 1209 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); 1210 } 1211 1212 /* 1213 * is_exit: is this "exit" or "exit_group"? 1214 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 1215 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 1216 * nonexistent: Just a hole in the syscall table, syscall id not allocated 1217 */ 1218 struct syscall { 1219 struct tep_event *tp_format; 1220 int nr_args; 1221 int args_size; 1222 struct { 1223 struct bpf_program *sys_enter, 1224 *sys_exit; 1225 } bpf_prog; 1226 bool is_exit; 1227 bool is_open; 1228 bool nonexistent; 1229 struct tep_format_field *args; 1230 const char *name; 1231 const struct syscall_fmt *fmt; 1232 struct syscall_arg_fmt *arg_fmt; 1233 }; 1234 1235 /* 1236 * We need to have this 'calculated' boolean because in some cases we really 1237 * don't know what is the duration of a syscall, for instance, when we start 1238 * a session and some threads are waiting for a syscall to finish, say 'poll', 1239 * in which case all we can do is to print "( ? ) for duration and for the 1240 * start timestamp. 1241 */ 1242 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1243 { 1244 double duration = (double)t / NSEC_PER_MSEC; 1245 size_t printed = fprintf(fp, "("); 1246 1247 if (!calculated) 1248 printed += fprintf(fp, " "); 1249 else if (duration >= 1.0) 1250 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1251 else if (duration >= 0.01) 1252 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1253 else 1254 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1255 return printed + fprintf(fp, "): "); 1256 } 1257 1258 /** 1259 * filename.ptr: The filename char pointer that will be vfs_getname'd 1260 * filename.entry_str_pos: Where to insert the string translated from 1261 * filename.ptr by the vfs_getname tracepoint/kprobe. 1262 * ret_scnprintf: syscall args may set this to a different syscall return 1263 * formatter, for instance, fcntl may return fds, file flags, etc. 1264 */ 1265 struct thread_trace { 1266 u64 entry_time; 1267 bool entry_pending; 1268 unsigned long nr_events; 1269 unsigned long pfmaj, pfmin; 1270 char *entry_str; 1271 double runtime_ms; 1272 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1273 struct { 1274 unsigned long ptr; 1275 short int entry_str_pos; 1276 bool pending_open; 1277 unsigned int namelen; 1278 char *name; 1279 } filename; 1280 struct { 1281 int max; 1282 struct file *table; 1283 } files; 1284 1285 struct intlist *syscall_stats; 1286 }; 1287 1288 static struct thread_trace *thread_trace__new(void) 1289 { 1290 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1291 1292 if (ttrace) { 1293 ttrace->files.max = -1; 1294 ttrace->syscall_stats = intlist__new(NULL); 1295 } 1296 1297 return ttrace; 1298 } 1299 1300 static void thread_trace__free_files(struct thread_trace *ttrace); 1301 1302 static void thread_trace__delete(void *pttrace) 1303 { 1304 struct thread_trace *ttrace = pttrace; 1305 1306 if (!ttrace) 1307 return; 1308 1309 intlist__delete(ttrace->syscall_stats); 1310 ttrace->syscall_stats = NULL; 1311 thread_trace__free_files(ttrace); 1312 zfree(&ttrace->entry_str); 1313 free(ttrace); 1314 } 1315 1316 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1317 { 1318 struct thread_trace *ttrace; 1319 1320 if (thread == NULL) 1321 goto fail; 1322 1323 if (thread__priv(thread) == NULL) 1324 thread__set_priv(thread, thread_trace__new()); 1325 1326 if (thread__priv(thread) == NULL) 1327 goto fail; 1328 1329 ttrace = thread__priv(thread); 1330 ++ttrace->nr_events; 1331 1332 return ttrace; 1333 fail: 1334 color_fprintf(fp, PERF_COLOR_RED, 1335 "WARNING: not enough memory, dropping samples!\n"); 1336 return NULL; 1337 } 1338 1339 1340 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1341 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1342 { 1343 struct thread_trace *ttrace = thread__priv(arg->thread); 1344 1345 ttrace->ret_scnprintf = ret_scnprintf; 1346 } 1347 1348 #define TRACE_PFMAJ (1 << 0) 1349 #define TRACE_PFMIN (1 << 1) 1350 1351 static const size_t trace__entry_str_size = 2048; 1352 1353 static void thread_trace__free_files(struct thread_trace *ttrace) 1354 { 1355 for (int i = 0; i < ttrace->files.max; ++i) { 1356 struct file *file = ttrace->files.table + i; 1357 zfree(&file->pathname); 1358 } 1359 1360 zfree(&ttrace->files.table); 1361 ttrace->files.max = -1; 1362 } 1363 1364 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1365 { 1366 if (fd < 0) 1367 return NULL; 1368 1369 if (fd > ttrace->files.max) { 1370 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1371 1372 if (nfiles == NULL) 1373 return NULL; 1374 1375 if (ttrace->files.max != -1) { 1376 memset(nfiles + ttrace->files.max + 1, 0, 1377 (fd - ttrace->files.max) * sizeof(struct file)); 1378 } else { 1379 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1380 } 1381 1382 ttrace->files.table = nfiles; 1383 ttrace->files.max = fd; 1384 } 1385 1386 return ttrace->files.table + fd; 1387 } 1388 1389 struct file *thread__files_entry(struct thread *thread, int fd) 1390 { 1391 return thread_trace__files_entry(thread__priv(thread), fd); 1392 } 1393 1394 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1395 { 1396 struct thread_trace *ttrace = thread__priv(thread); 1397 struct file *file = thread_trace__files_entry(ttrace, fd); 1398 1399 if (file != NULL) { 1400 struct stat st; 1401 if (stat(pathname, &st) == 0) 1402 file->dev_maj = major(st.st_rdev); 1403 file->pathname = strdup(pathname); 1404 if (file->pathname) 1405 return 0; 1406 } 1407 1408 return -1; 1409 } 1410 1411 static int thread__read_fd_path(struct thread *thread, int fd) 1412 { 1413 char linkname[PATH_MAX], pathname[PATH_MAX]; 1414 struct stat st; 1415 int ret; 1416 1417 if (thread__pid(thread) == thread__tid(thread)) { 1418 scnprintf(linkname, sizeof(linkname), 1419 "/proc/%d/fd/%d", thread__pid(thread), fd); 1420 } else { 1421 scnprintf(linkname, sizeof(linkname), 1422 "/proc/%d/task/%d/fd/%d", 1423 thread__pid(thread), thread__tid(thread), fd); 1424 } 1425 1426 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1427 return -1; 1428 1429 ret = readlink(linkname, pathname, sizeof(pathname)); 1430 1431 if (ret < 0 || ret > st.st_size) 1432 return -1; 1433 1434 pathname[ret] = '\0'; 1435 return trace__set_fd_pathname(thread, fd, pathname); 1436 } 1437 1438 static const char *thread__fd_path(struct thread *thread, int fd, 1439 struct trace *trace) 1440 { 1441 struct thread_trace *ttrace = thread__priv(thread); 1442 1443 if (ttrace == NULL || trace->fd_path_disabled) 1444 return NULL; 1445 1446 if (fd < 0) 1447 return NULL; 1448 1449 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1450 if (!trace->live) 1451 return NULL; 1452 ++trace->stats.proc_getname; 1453 if (thread__read_fd_path(thread, fd)) 1454 return NULL; 1455 } 1456 1457 return ttrace->files.table[fd].pathname; 1458 } 1459 1460 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1461 { 1462 int fd = arg->val; 1463 size_t printed = scnprintf(bf, size, "%d", fd); 1464 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1465 1466 if (path) 1467 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1468 1469 return printed; 1470 } 1471 1472 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1473 { 1474 size_t printed = scnprintf(bf, size, "%d", fd); 1475 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1476 1477 if (thread) { 1478 const char *path = thread__fd_path(thread, fd, trace); 1479 1480 if (path) 1481 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1482 1483 thread__put(thread); 1484 } 1485 1486 return printed; 1487 } 1488 1489 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1490 struct syscall_arg *arg) 1491 { 1492 int fd = arg->val; 1493 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1494 struct thread_trace *ttrace = thread__priv(arg->thread); 1495 1496 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1497 zfree(&ttrace->files.table[fd].pathname); 1498 1499 return printed; 1500 } 1501 1502 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1503 unsigned long ptr) 1504 { 1505 struct thread_trace *ttrace = thread__priv(thread); 1506 1507 ttrace->filename.ptr = ptr; 1508 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1509 } 1510 1511 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1512 { 1513 struct augmented_arg *augmented_arg = arg->augmented.args; 1514 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1515 /* 1516 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1517 * we would have two strings, each prefixed by its size. 1518 */ 1519 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1520 1521 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1522 arg->augmented.size -= consumed; 1523 1524 return printed; 1525 } 1526 1527 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1528 struct syscall_arg *arg) 1529 { 1530 unsigned long ptr = arg->val; 1531 1532 if (arg->augmented.args) 1533 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1534 1535 if (!arg->trace->vfs_getname) 1536 return scnprintf(bf, size, "%#x", ptr); 1537 1538 thread__set_filename_pos(arg->thread, bf, ptr); 1539 return 0; 1540 } 1541 1542 static bool trace__filter_duration(struct trace *trace, double t) 1543 { 1544 return t < (trace->duration_filter * NSEC_PER_MSEC); 1545 } 1546 1547 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1548 { 1549 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1550 1551 return fprintf(fp, "%10.3f ", ts); 1552 } 1553 1554 /* 1555 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1556 * using ttrace->entry_time for a thread that receives a sys_exit without 1557 * first having received a sys_enter ("poll" issued before tracing session 1558 * starts, lost sys_enter exit due to ring buffer overflow). 1559 */ 1560 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1561 { 1562 if (tstamp > 0) 1563 return __trace__fprintf_tstamp(trace, tstamp, fp); 1564 1565 return fprintf(fp, " ? "); 1566 } 1567 1568 static pid_t workload_pid = -1; 1569 static volatile sig_atomic_t done = false; 1570 static volatile sig_atomic_t interrupted = false; 1571 1572 static void sighandler_interrupt(int sig __maybe_unused) 1573 { 1574 done = interrupted = true; 1575 } 1576 1577 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, 1578 void *context __maybe_unused) 1579 { 1580 if (info->si_pid == workload_pid) 1581 done = true; 1582 } 1583 1584 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1585 { 1586 size_t printed = 0; 1587 1588 if (trace->multiple_threads) { 1589 if (trace->show_comm) 1590 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1591 printed += fprintf(fp, "%d ", thread__tid(thread)); 1592 } 1593 1594 return printed; 1595 } 1596 1597 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1598 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1599 { 1600 size_t printed = 0; 1601 1602 if (trace->show_tstamp) 1603 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1604 if (trace->show_duration) 1605 printed += fprintf_duration(duration, duration_calculated, fp); 1606 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1607 } 1608 1609 static int trace__process_event(struct trace *trace, struct machine *machine, 1610 union perf_event *event, struct perf_sample *sample) 1611 { 1612 int ret = 0; 1613 1614 switch (event->header.type) { 1615 case PERF_RECORD_LOST: 1616 color_fprintf(trace->output, PERF_COLOR_RED, 1617 "LOST %" PRIu64 " events!\n", event->lost.lost); 1618 ret = machine__process_lost_event(machine, event, sample); 1619 break; 1620 default: 1621 ret = machine__process_event(machine, event, sample); 1622 break; 1623 } 1624 1625 return ret; 1626 } 1627 1628 static int trace__tool_process(struct perf_tool *tool, 1629 union perf_event *event, 1630 struct perf_sample *sample, 1631 struct machine *machine) 1632 { 1633 struct trace *trace = container_of(tool, struct trace, tool); 1634 return trace__process_event(trace, machine, event, sample); 1635 } 1636 1637 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1638 { 1639 struct machine *machine = vmachine; 1640 1641 if (machine->kptr_restrict_warned) 1642 return NULL; 1643 1644 if (symbol_conf.kptr_restrict) { 1645 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1646 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1647 "Kernel samples will not be resolved.\n"); 1648 machine->kptr_restrict_warned = true; 1649 return NULL; 1650 } 1651 1652 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1653 } 1654 1655 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1656 { 1657 int err = symbol__init(NULL); 1658 1659 if (err) 1660 return err; 1661 1662 trace->host = machine__new_host(); 1663 if (trace->host == NULL) 1664 return -ENOMEM; 1665 1666 thread__set_priv_destructor(thread_trace__delete); 1667 1668 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1669 if (err < 0) 1670 goto out; 1671 1672 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1673 evlist->core.threads, trace__tool_process, 1674 true, false, 1); 1675 out: 1676 if (err) 1677 symbol__exit(); 1678 1679 return err; 1680 } 1681 1682 static void trace__symbols__exit(struct trace *trace) 1683 { 1684 machine__exit(trace->host); 1685 trace->host = NULL; 1686 1687 symbol__exit(); 1688 } 1689 1690 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1691 { 1692 int idx; 1693 1694 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0) 1695 nr_args = sc->fmt->nr_args; 1696 1697 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1698 if (sc->arg_fmt == NULL) 1699 return -1; 1700 1701 for (idx = 0; idx < nr_args; ++idx) { 1702 if (sc->fmt) 1703 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1704 } 1705 1706 sc->nr_args = nr_args; 1707 return 0; 1708 } 1709 1710 static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { 1711 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, 1712 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, 1713 }; 1714 1715 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) 1716 { 1717 const struct syscall_arg_fmt *fmt = fmtp; 1718 return strcmp(name, fmt->name); 1719 } 1720 1721 static const struct syscall_arg_fmt * 1722 __syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb, 1723 const char *name) 1724 { 1725 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); 1726 } 1727 1728 static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) 1729 { 1730 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); 1731 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); 1732 } 1733 1734 static struct tep_format_field * 1735 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) 1736 { 1737 struct tep_format_field *last_field = NULL; 1738 int len; 1739 1740 for (; field; field = field->next, ++arg) { 1741 last_field = field; 1742 1743 if (arg->scnprintf) 1744 continue; 1745 1746 len = strlen(field->name); 1747 1748 if (strcmp(field->type, "const char *") == 0 && 1749 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1750 strstr(field->name, "path") != NULL)) 1751 arg->scnprintf = SCA_FILENAME; 1752 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1753 arg->scnprintf = SCA_PTR; 1754 else if (strcmp(field->type, "pid_t") == 0) 1755 arg->scnprintf = SCA_PID; 1756 else if (strcmp(field->type, "umode_t") == 0) 1757 arg->scnprintf = SCA_MODE_T; 1758 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { 1759 arg->scnprintf = SCA_CHAR_ARRAY; 1760 arg->nr_entries = field->arraylen; 1761 } else if ((strcmp(field->type, "int") == 0 || 1762 strcmp(field->type, "unsigned int") == 0 || 1763 strcmp(field->type, "long") == 0) && 1764 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1765 /* 1766 * /sys/kernel/tracing/events/syscalls/sys_enter* 1767 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1768 * 65 int 1769 * 23 unsigned int 1770 * 7 unsigned long 1771 */ 1772 arg->scnprintf = SCA_FD; 1773 } else { 1774 const struct syscall_arg_fmt *fmt = 1775 syscall_arg_fmt__find_by_name(field->name); 1776 1777 if (fmt) { 1778 arg->scnprintf = fmt->scnprintf; 1779 arg->strtoul = fmt->strtoul; 1780 } 1781 } 1782 } 1783 1784 return last_field; 1785 } 1786 1787 static int syscall__set_arg_fmts(struct syscall *sc) 1788 { 1789 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); 1790 1791 if (last_field) 1792 sc->args_size = last_field->offset + last_field->size; 1793 1794 return 0; 1795 } 1796 1797 static int trace__read_syscall_info(struct trace *trace, int id) 1798 { 1799 char tp_name[128]; 1800 struct syscall *sc; 1801 const char *name = syscalltbl__name(trace->sctbl, id); 1802 1803 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 1804 if (trace->syscalls.table == NULL) { 1805 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1806 if (trace->syscalls.table == NULL) 1807 return -ENOMEM; 1808 } 1809 #else 1810 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { 1811 // When using libaudit we don't know beforehand what is the max syscall id 1812 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1813 1814 if (table == NULL) 1815 return -ENOMEM; 1816 1817 // Need to memset from offset 0 and +1 members if brand new 1818 if (trace->syscalls.table == NULL) 1819 memset(table, 0, (id + 1) * sizeof(*sc)); 1820 else 1821 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); 1822 1823 trace->syscalls.table = table; 1824 trace->sctbl->syscalls.max_id = id; 1825 } 1826 #endif 1827 sc = trace->syscalls.table + id; 1828 if (sc->nonexistent) 1829 return -EEXIST; 1830 1831 if (name == NULL) { 1832 sc->nonexistent = true; 1833 return -EEXIST; 1834 } 1835 1836 sc->name = name; 1837 sc->fmt = syscall_fmt__find(sc->name); 1838 1839 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1840 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1841 1842 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1843 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1844 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1845 } 1846 1847 /* 1848 * Fails to read trace point format via sysfs node, so the trace point 1849 * doesn't exist. Set the 'nonexistent' flag as true. 1850 */ 1851 if (IS_ERR(sc->tp_format)) { 1852 sc->nonexistent = true; 1853 return PTR_ERR(sc->tp_format); 1854 } 1855 1856 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 1857 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields)) 1858 return -ENOMEM; 1859 1860 sc->args = sc->tp_format->format.fields; 1861 /* 1862 * We need to check and discard the first variable '__syscall_nr' 1863 * or 'nr' that mean the syscall number. It is needless here. 1864 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1865 */ 1866 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1867 sc->args = sc->args->next; 1868 --sc->nr_args; 1869 } 1870 1871 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1872 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1873 1874 return syscall__set_arg_fmts(sc); 1875 } 1876 1877 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) 1878 { 1879 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 1880 1881 if (fmt != NULL) { 1882 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); 1883 return 0; 1884 } 1885 1886 return -ENOMEM; 1887 } 1888 1889 static int intcmp(const void *a, const void *b) 1890 { 1891 const int *one = a, *another = b; 1892 1893 return *one - *another; 1894 } 1895 1896 static int trace__validate_ev_qualifier(struct trace *trace) 1897 { 1898 int err = 0; 1899 bool printed_invalid_prefix = false; 1900 struct str_node *pos; 1901 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1902 1903 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1904 sizeof(trace->ev_qualifier_ids.entries[0])); 1905 1906 if (trace->ev_qualifier_ids.entries == NULL) { 1907 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1908 trace->output); 1909 err = -EINVAL; 1910 goto out; 1911 } 1912 1913 strlist__for_each_entry(pos, trace->ev_qualifier) { 1914 const char *sc = pos->s; 1915 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1916 1917 if (id < 0) { 1918 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1919 if (id >= 0) 1920 goto matches; 1921 1922 if (!printed_invalid_prefix) { 1923 pr_debug("Skipping unknown syscalls: "); 1924 printed_invalid_prefix = true; 1925 } else { 1926 pr_debug(", "); 1927 } 1928 1929 pr_debug("%s", sc); 1930 continue; 1931 } 1932 matches: 1933 trace->ev_qualifier_ids.entries[nr_used++] = id; 1934 if (match_next == -1) 1935 continue; 1936 1937 while (1) { 1938 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1939 if (id < 0) 1940 break; 1941 if (nr_allocated == nr_used) { 1942 void *entries; 1943 1944 nr_allocated += 8; 1945 entries = realloc(trace->ev_qualifier_ids.entries, 1946 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1947 if (entries == NULL) { 1948 err = -ENOMEM; 1949 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1950 goto out_free; 1951 } 1952 trace->ev_qualifier_ids.entries = entries; 1953 } 1954 trace->ev_qualifier_ids.entries[nr_used++] = id; 1955 } 1956 } 1957 1958 trace->ev_qualifier_ids.nr = nr_used; 1959 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1960 out: 1961 if (printed_invalid_prefix) 1962 pr_debug("\n"); 1963 return err; 1964 out_free: 1965 zfree(&trace->ev_qualifier_ids.entries); 1966 trace->ev_qualifier_ids.nr = 0; 1967 goto out; 1968 } 1969 1970 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1971 { 1972 bool in_ev_qualifier; 1973 1974 if (trace->ev_qualifier_ids.nr == 0) 1975 return true; 1976 1977 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1978 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1979 1980 if (in_ev_qualifier) 1981 return !trace->not_ev_qualifier; 1982 1983 return trace->not_ev_qualifier; 1984 } 1985 1986 /* 1987 * args is to be interpreted as a series of longs but we need to handle 1988 * 8-byte unaligned accesses. args points to raw_data within the event 1989 * and raw_data is guaranteed to be 8-byte unaligned because it is 1990 * preceded by raw_size which is a u32. So we need to copy args to a temp 1991 * variable to read it. Most notably this avoids extended load instructions 1992 * on unaligned addresses 1993 */ 1994 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1995 { 1996 unsigned long val; 1997 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1998 1999 memcpy(&val, p, sizeof(val)); 2000 return val; 2001 } 2002 2003 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 2004 struct syscall_arg *arg) 2005 { 2006 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 2007 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 2008 2009 return scnprintf(bf, size, "arg%d: ", arg->idx); 2010 } 2011 2012 /* 2013 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 2014 * as mount 'flags' argument that needs ignoring some magic flag, see comment 2015 * in tools/perf/trace/beauty/mount_flags.c 2016 */ 2017 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) 2018 { 2019 if (fmt && fmt->mask_val) 2020 return fmt->mask_val(arg, val); 2021 2022 return val; 2023 } 2024 2025 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, 2026 struct syscall_arg *arg, unsigned long val) 2027 { 2028 if (fmt && fmt->scnprintf) { 2029 arg->val = val; 2030 if (fmt->parm) 2031 arg->parm = fmt->parm; 2032 return fmt->scnprintf(bf, size, arg); 2033 } 2034 return scnprintf(bf, size, "%ld", val); 2035 } 2036 2037 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 2038 unsigned char *args, void *augmented_args, int augmented_args_size, 2039 struct trace *trace, struct thread *thread) 2040 { 2041 size_t printed = 0; 2042 unsigned long val; 2043 u8 bit = 1; 2044 struct syscall_arg arg = { 2045 .args = args, 2046 .augmented = { 2047 .size = augmented_args_size, 2048 .args = augmented_args, 2049 }, 2050 .idx = 0, 2051 .mask = 0, 2052 .trace = trace, 2053 .thread = thread, 2054 .show_string_prefix = trace->show_string_prefix, 2055 }; 2056 struct thread_trace *ttrace = thread__priv(thread); 2057 2058 /* 2059 * Things like fcntl will set this in its 'cmd' formatter to pick the 2060 * right formatter for the return value (an fd? file flags?), which is 2061 * not needed for syscalls that always return a given type, say an fd. 2062 */ 2063 ttrace->ret_scnprintf = NULL; 2064 2065 if (sc->args != NULL) { 2066 struct tep_format_field *field; 2067 2068 for (field = sc->args; field; 2069 field = field->next, ++arg.idx, bit <<= 1) { 2070 if (arg.mask & bit) 2071 continue; 2072 2073 arg.fmt = &sc->arg_fmt[arg.idx]; 2074 val = syscall_arg__val(&arg, arg.idx); 2075 /* 2076 * Some syscall args need some mask, most don't and 2077 * return val untouched. 2078 */ 2079 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); 2080 2081 /* 2082 * Suppress this argument if its value is zero and 2083 * and we don't have a string associated in an 2084 * strarray for it. 2085 */ 2086 if (val == 0 && 2087 !trace->show_zeros && 2088 !(sc->arg_fmt && 2089 (sc->arg_fmt[arg.idx].show_zero || 2090 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 2091 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 2092 sc->arg_fmt[arg.idx].parm)) 2093 continue; 2094 2095 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2096 2097 if (trace->show_arg_names) 2098 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2099 2100 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], 2101 bf + printed, size - printed, &arg, val); 2102 } 2103 } else if (IS_ERR(sc->tp_format)) { 2104 /* 2105 * If we managed to read the tracepoint /format file, then we 2106 * may end up not having any args, like with gettid(), so only 2107 * print the raw args when we didn't manage to read it. 2108 */ 2109 while (arg.idx < sc->nr_args) { 2110 if (arg.mask & bit) 2111 goto next_arg; 2112 val = syscall_arg__val(&arg, arg.idx); 2113 if (printed) 2114 printed += scnprintf(bf + printed, size - printed, ", "); 2115 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 2116 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); 2117 next_arg: 2118 ++arg.idx; 2119 bit <<= 1; 2120 } 2121 } 2122 2123 return printed; 2124 } 2125 2126 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 2127 union perf_event *event, 2128 struct perf_sample *sample); 2129 2130 static struct syscall *trace__syscall_info(struct trace *trace, 2131 struct evsel *evsel, int id) 2132 { 2133 int err = 0; 2134 2135 if (id < 0) { 2136 2137 /* 2138 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 2139 * before that, leaving at a higher verbosity level till that is 2140 * explained. Reproduced with plain ftrace with: 2141 * 2142 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 2143 * grep "NR -1 " /t/trace_pipe 2144 * 2145 * After generating some load on the machine. 2146 */ 2147 if (verbose > 1) { 2148 static u64 n; 2149 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 2150 id, evsel__name(evsel), ++n); 2151 } 2152 return NULL; 2153 } 2154 2155 err = -EINVAL; 2156 2157 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 2158 if (id > trace->sctbl->syscalls.max_id) { 2159 #else 2160 if (id >= trace->sctbl->syscalls.max_id) { 2161 /* 2162 * With libaudit we don't know beforehand what is the max_id, 2163 * so we let trace__read_syscall_info() figure that out as we 2164 * go on reading syscalls. 2165 */ 2166 err = trace__read_syscall_info(trace, id); 2167 if (err) 2168 #endif 2169 goto out_cant_read; 2170 } 2171 2172 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 2173 (err = trace__read_syscall_info(trace, id)) != 0) 2174 goto out_cant_read; 2175 2176 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent) 2177 goto out_cant_read; 2178 2179 return &trace->syscalls.table[id]; 2180 2181 out_cant_read: 2182 if (verbose > 0) { 2183 char sbuf[STRERR_BUFSIZE]; 2184 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 2185 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 2186 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 2187 fputs(" information\n", trace->output); 2188 } 2189 return NULL; 2190 } 2191 2192 struct syscall_stats { 2193 struct stats stats; 2194 u64 nr_failures; 2195 int max_errno; 2196 u32 *errnos; 2197 }; 2198 2199 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, 2200 int id, struct perf_sample *sample, long err, bool errno_summary) 2201 { 2202 struct int_node *inode; 2203 struct syscall_stats *stats; 2204 u64 duration = 0; 2205 2206 inode = intlist__findnew(ttrace->syscall_stats, id); 2207 if (inode == NULL) 2208 return; 2209 2210 stats = inode->priv; 2211 if (stats == NULL) { 2212 stats = zalloc(sizeof(*stats)); 2213 if (stats == NULL) 2214 return; 2215 2216 init_stats(&stats->stats); 2217 inode->priv = stats; 2218 } 2219 2220 if (ttrace->entry_time && sample->time > ttrace->entry_time) 2221 duration = sample->time - ttrace->entry_time; 2222 2223 update_stats(&stats->stats, duration); 2224 2225 if (err < 0) { 2226 ++stats->nr_failures; 2227 2228 if (!errno_summary) 2229 return; 2230 2231 err = -err; 2232 if (err > stats->max_errno) { 2233 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); 2234 2235 if (new_errnos) { 2236 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); 2237 } else { 2238 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", 2239 thread__comm_str(thread), thread__pid(thread), 2240 thread__tid(thread)); 2241 return; 2242 } 2243 2244 stats->errnos = new_errnos; 2245 stats->max_errno = err; 2246 } 2247 2248 ++stats->errnos[err - 1]; 2249 } 2250 } 2251 2252 static int trace__printf_interrupted_entry(struct trace *trace) 2253 { 2254 struct thread_trace *ttrace; 2255 size_t printed; 2256 int len; 2257 2258 if (trace->failure_only || trace->current == NULL) 2259 return 0; 2260 2261 ttrace = thread__priv(trace->current); 2262 2263 if (!ttrace->entry_pending) 2264 return 0; 2265 2266 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 2267 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 2268 2269 if (len < trace->args_alignment - 4) 2270 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 2271 2272 printed += fprintf(trace->output, " ...\n"); 2273 2274 ttrace->entry_pending = false; 2275 ++trace->nr_events_printed; 2276 2277 return printed; 2278 } 2279 2280 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 2281 struct perf_sample *sample, struct thread *thread) 2282 { 2283 int printed = 0; 2284 2285 if (trace->print_sample) { 2286 double ts = (double)sample->time / NSEC_PER_MSEC; 2287 2288 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 2289 evsel__name(evsel), ts, 2290 thread__comm_str(thread), 2291 sample->pid, sample->tid, sample->cpu); 2292 } 2293 2294 return printed; 2295 } 2296 2297 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 2298 { 2299 void *augmented_args = NULL; 2300 /* 2301 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 2302 * and there we get all 6 syscall args plus the tracepoint common fields 2303 * that gets calculated at the start and the syscall_nr (another long). 2304 * So we check if that is the case and if so don't look after the 2305 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 2306 * which is fixed. 2307 * 2308 * We'll revisit this later to pass s->args_size to the BPF augmenter 2309 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 2310 * copies only what we need for each syscall, like what happens when we 2311 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 2312 * traffic to just what is needed for each syscall. 2313 */ 2314 int args_size = raw_augmented_args_size ?: sc->args_size; 2315 2316 *augmented_args_size = sample->raw_size - args_size; 2317 if (*augmented_args_size > 0) 2318 augmented_args = sample->raw_data + args_size; 2319 2320 return augmented_args; 2321 } 2322 2323 static void syscall__exit(struct syscall *sc) 2324 { 2325 if (!sc) 2326 return; 2327 2328 zfree(&sc->arg_fmt); 2329 } 2330 2331 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 2332 union perf_event *event __maybe_unused, 2333 struct perf_sample *sample) 2334 { 2335 char *msg; 2336 void *args; 2337 int printed = 0; 2338 struct thread *thread; 2339 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2340 int augmented_args_size = 0; 2341 void *augmented_args = NULL; 2342 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2343 struct thread_trace *ttrace; 2344 2345 if (sc == NULL) 2346 return -1; 2347 2348 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2349 ttrace = thread__trace(thread, trace->output); 2350 if (ttrace == NULL) 2351 goto out_put; 2352 2353 trace__fprintf_sample(trace, evsel, sample, thread); 2354 2355 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2356 2357 if (ttrace->entry_str == NULL) { 2358 ttrace->entry_str = malloc(trace__entry_str_size); 2359 if (!ttrace->entry_str) 2360 goto out_put; 2361 } 2362 2363 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 2364 trace__printf_interrupted_entry(trace); 2365 /* 2366 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 2367 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 2368 * this breaks syscall__augmented_args() check for augmented args, as we calculate 2369 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 2370 * so when handling, say the openat syscall, we end up getting 6 args for the 2371 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 2372 * thinking that the extra 2 u64 args are the augmented filename, so just check 2373 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 2374 */ 2375 if (evsel != trace->syscalls.events.sys_enter) 2376 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2377 ttrace->entry_time = sample->time; 2378 msg = ttrace->entry_str; 2379 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 2380 2381 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 2382 args, augmented_args, augmented_args_size, trace, thread); 2383 2384 if (sc->is_exit) { 2385 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 2386 int alignment = 0; 2387 2388 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2389 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2390 if (trace->args_alignment > printed) 2391 alignment = trace->args_alignment - printed; 2392 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2393 } 2394 } else { 2395 ttrace->entry_pending = true; 2396 /* See trace__vfs_getname & trace__sys_exit */ 2397 ttrace->filename.pending_open = false; 2398 } 2399 2400 if (trace->current != thread) { 2401 thread__put(trace->current); 2402 trace->current = thread__get(thread); 2403 } 2404 err = 0; 2405 out_put: 2406 thread__put(thread); 2407 return err; 2408 } 2409 2410 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2411 struct perf_sample *sample) 2412 { 2413 struct thread_trace *ttrace; 2414 struct thread *thread; 2415 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2416 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2417 char msg[1024]; 2418 void *args, *augmented_args = NULL; 2419 int augmented_args_size; 2420 2421 if (sc == NULL) 2422 return -1; 2423 2424 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2425 ttrace = thread__trace(thread, trace->output); 2426 /* 2427 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2428 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2429 */ 2430 if (ttrace == NULL) 2431 goto out_put; 2432 2433 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2434 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2435 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2436 fprintf(trace->output, "%s", msg); 2437 err = 0; 2438 out_put: 2439 thread__put(thread); 2440 return err; 2441 } 2442 2443 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2444 struct perf_sample *sample, 2445 struct callchain_cursor *cursor) 2446 { 2447 struct addr_location al; 2448 int max_stack = evsel->core.attr.sample_max_stack ? 2449 evsel->core.attr.sample_max_stack : 2450 trace->max_stack; 2451 int err = -1; 2452 2453 addr_location__init(&al); 2454 if (machine__resolve(trace->host, &al, sample) < 0) 2455 goto out; 2456 2457 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2458 out: 2459 addr_location__exit(&al); 2460 return err; 2461 } 2462 2463 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2464 { 2465 /* TODO: user-configurable print_opts */ 2466 const unsigned int print_opts = EVSEL__PRINT_SYM | 2467 EVSEL__PRINT_DSO | 2468 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2469 2470 return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output); 2471 } 2472 2473 static const char *errno_to_name(struct evsel *evsel, int err) 2474 { 2475 struct perf_env *env = evsel__env(evsel); 2476 2477 return perf_env__arch_strerrno(env, err); 2478 } 2479 2480 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2481 union perf_event *event __maybe_unused, 2482 struct perf_sample *sample) 2483 { 2484 long ret; 2485 u64 duration = 0; 2486 bool duration_calculated = false; 2487 struct thread *thread; 2488 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2489 int alignment = trace->args_alignment; 2490 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2491 struct thread_trace *ttrace; 2492 2493 if (sc == NULL) 2494 return -1; 2495 2496 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2497 ttrace = thread__trace(thread, trace->output); 2498 if (ttrace == NULL) 2499 goto out_put; 2500 2501 trace__fprintf_sample(trace, evsel, sample, thread); 2502 2503 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2504 2505 if (trace->summary) 2506 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); 2507 2508 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2509 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2510 ttrace->filename.pending_open = false; 2511 ++trace->stats.vfs_getname; 2512 } 2513 2514 if (ttrace->entry_time) { 2515 duration = sample->time - ttrace->entry_time; 2516 if (trace__filter_duration(trace, duration)) 2517 goto out; 2518 duration_calculated = true; 2519 } else if (trace->duration_filter) 2520 goto out; 2521 2522 if (sample->callchain) { 2523 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2524 2525 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2526 if (callchain_ret == 0) { 2527 if (cursor->nr < trace->min_stack) 2528 goto out; 2529 callchain_ret = 1; 2530 } 2531 } 2532 2533 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2534 goto out; 2535 2536 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2537 2538 if (ttrace->entry_pending) { 2539 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2540 } else { 2541 printed += fprintf(trace->output, " ... ["); 2542 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2543 printed += 9; 2544 printed += fprintf(trace->output, "]: %s()", sc->name); 2545 } 2546 2547 printed++; /* the closing ')' */ 2548 2549 if (alignment > printed) 2550 alignment -= printed; 2551 else 2552 alignment = 0; 2553 2554 fprintf(trace->output, ")%*s= ", alignment, " "); 2555 2556 if (sc->fmt == NULL) { 2557 if (ret < 0) 2558 goto errno_print; 2559 signed_print: 2560 fprintf(trace->output, "%ld", ret); 2561 } else if (ret < 0) { 2562 errno_print: { 2563 char bf[STRERR_BUFSIZE]; 2564 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2565 *e = errno_to_name(evsel, -ret); 2566 2567 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2568 } 2569 } else if (ret == 0 && sc->fmt->timeout) 2570 fprintf(trace->output, "0 (Timeout)"); 2571 else if (ttrace->ret_scnprintf) { 2572 char bf[1024]; 2573 struct syscall_arg arg = { 2574 .val = ret, 2575 .thread = thread, 2576 .trace = trace, 2577 }; 2578 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2579 ttrace->ret_scnprintf = NULL; 2580 fprintf(trace->output, "%s", bf); 2581 } else if (sc->fmt->hexret) 2582 fprintf(trace->output, "%#lx", ret); 2583 else if (sc->fmt->errpid) { 2584 struct thread *child = machine__find_thread(trace->host, ret, ret); 2585 2586 if (child != NULL) { 2587 fprintf(trace->output, "%ld", ret); 2588 if (thread__comm_set(child)) 2589 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2590 thread__put(child); 2591 } 2592 } else 2593 goto signed_print; 2594 2595 fputc('\n', trace->output); 2596 2597 /* 2598 * We only consider an 'event' for the sake of --max-events a non-filtered 2599 * sys_enter + sys_exit and other tracepoint events. 2600 */ 2601 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2602 interrupted = true; 2603 2604 if (callchain_ret > 0) 2605 trace__fprintf_callchain(trace, sample); 2606 else if (callchain_ret < 0) 2607 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2608 out: 2609 ttrace->entry_pending = false; 2610 err = 0; 2611 out_put: 2612 thread__put(thread); 2613 return err; 2614 } 2615 2616 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2617 union perf_event *event __maybe_unused, 2618 struct perf_sample *sample) 2619 { 2620 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2621 struct thread_trace *ttrace; 2622 size_t filename_len, entry_str_len, to_move; 2623 ssize_t remaining_space; 2624 char *pos; 2625 const char *filename = evsel__rawptr(evsel, sample, "pathname"); 2626 2627 if (!thread) 2628 goto out; 2629 2630 ttrace = thread__priv(thread); 2631 if (!ttrace) 2632 goto out_put; 2633 2634 filename_len = strlen(filename); 2635 if (filename_len == 0) 2636 goto out_put; 2637 2638 if (ttrace->filename.namelen < filename_len) { 2639 char *f = realloc(ttrace->filename.name, filename_len + 1); 2640 2641 if (f == NULL) 2642 goto out_put; 2643 2644 ttrace->filename.namelen = filename_len; 2645 ttrace->filename.name = f; 2646 } 2647 2648 strcpy(ttrace->filename.name, filename); 2649 ttrace->filename.pending_open = true; 2650 2651 if (!ttrace->filename.ptr) 2652 goto out_put; 2653 2654 entry_str_len = strlen(ttrace->entry_str); 2655 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2656 if (remaining_space <= 0) 2657 goto out_put; 2658 2659 if (filename_len > (size_t)remaining_space) { 2660 filename += filename_len - remaining_space; 2661 filename_len = remaining_space; 2662 } 2663 2664 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2665 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2666 memmove(pos + filename_len, pos, to_move); 2667 memcpy(pos, filename, filename_len); 2668 2669 ttrace->filename.ptr = 0; 2670 ttrace->filename.entry_str_pos = 0; 2671 out_put: 2672 thread__put(thread); 2673 out: 2674 return 0; 2675 } 2676 2677 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2678 union perf_event *event __maybe_unused, 2679 struct perf_sample *sample) 2680 { 2681 u64 runtime = evsel__intval(evsel, sample, "runtime"); 2682 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2683 struct thread *thread = machine__findnew_thread(trace->host, 2684 sample->pid, 2685 sample->tid); 2686 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2687 2688 if (ttrace == NULL) 2689 goto out_dump; 2690 2691 ttrace->runtime_ms += runtime_ms; 2692 trace->runtime_ms += runtime_ms; 2693 out_put: 2694 thread__put(thread); 2695 return 0; 2696 2697 out_dump: 2698 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2699 evsel->name, 2700 evsel__strval(evsel, sample, "comm"), 2701 (pid_t)evsel__intval(evsel, sample, "pid"), 2702 runtime, 2703 evsel__intval(evsel, sample, "vruntime")); 2704 goto out_put; 2705 } 2706 2707 static int bpf_output__printer(enum binary_printer_ops op, 2708 unsigned int val, void *extra __maybe_unused, FILE *fp) 2709 { 2710 unsigned char ch = (unsigned char)val; 2711 2712 switch (op) { 2713 case BINARY_PRINT_CHAR_DATA: 2714 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2715 case BINARY_PRINT_DATA_BEGIN: 2716 case BINARY_PRINT_LINE_BEGIN: 2717 case BINARY_PRINT_ADDR: 2718 case BINARY_PRINT_NUM_DATA: 2719 case BINARY_PRINT_NUM_PAD: 2720 case BINARY_PRINT_SEP: 2721 case BINARY_PRINT_CHAR_PAD: 2722 case BINARY_PRINT_LINE_END: 2723 case BINARY_PRINT_DATA_END: 2724 default: 2725 break; 2726 } 2727 2728 return 0; 2729 } 2730 2731 static void bpf_output__fprintf(struct trace *trace, 2732 struct perf_sample *sample) 2733 { 2734 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2735 bpf_output__printer, NULL, trace->output); 2736 ++trace->nr_events_printed; 2737 } 2738 2739 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, 2740 struct thread *thread, void *augmented_args, int augmented_args_size) 2741 { 2742 char bf[2048]; 2743 size_t size = sizeof(bf); 2744 struct tep_format_field *field = evsel->tp_format->format.fields; 2745 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); 2746 size_t printed = 0; 2747 unsigned long val; 2748 u8 bit = 1; 2749 struct syscall_arg syscall_arg = { 2750 .augmented = { 2751 .size = augmented_args_size, 2752 .args = augmented_args, 2753 }, 2754 .idx = 0, 2755 .mask = 0, 2756 .trace = trace, 2757 .thread = thread, 2758 .show_string_prefix = trace->show_string_prefix, 2759 }; 2760 2761 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { 2762 if (syscall_arg.mask & bit) 2763 continue; 2764 2765 syscall_arg.len = 0; 2766 syscall_arg.fmt = arg; 2767 if (field->flags & TEP_FIELD_IS_ARRAY) { 2768 int offset = field->offset; 2769 2770 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2771 offset = format_field__intval(field, sample, evsel->needs_swap); 2772 syscall_arg.len = offset >> 16; 2773 offset &= 0xffff; 2774 if (tep_field_is_relative(field->flags)) 2775 offset += field->offset + field->size; 2776 } 2777 2778 val = (uintptr_t)(sample->raw_data + offset); 2779 } else 2780 val = format_field__intval(field, sample, evsel->needs_swap); 2781 /* 2782 * Some syscall args need some mask, most don't and 2783 * return val untouched. 2784 */ 2785 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); 2786 2787 /* 2788 * Suppress this argument if its value is zero and 2789 * we don't have a string associated in an 2790 * strarray for it. 2791 */ 2792 if (val == 0 && 2793 !trace->show_zeros && 2794 !((arg->show_zero || 2795 arg->scnprintf == SCA_STRARRAY || 2796 arg->scnprintf == SCA_STRARRAYS) && 2797 arg->parm)) 2798 continue; 2799 2800 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2801 2802 if (trace->show_arg_names) 2803 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2804 2805 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); 2806 } 2807 2808 return printed + fprintf(trace->output, "%s", bf); 2809 } 2810 2811 static int trace__event_handler(struct trace *trace, struct evsel *evsel, 2812 union perf_event *event __maybe_unused, 2813 struct perf_sample *sample) 2814 { 2815 struct thread *thread; 2816 int callchain_ret = 0; 2817 /* 2818 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2819 * this event's max_events having been hit and this is an entry coming 2820 * from the ring buffer that we should discard, since the max events 2821 * have already been considered/printed. 2822 */ 2823 if (evsel->disabled) 2824 return 0; 2825 2826 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2827 2828 if (sample->callchain) { 2829 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2830 2831 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2832 if (callchain_ret == 0) { 2833 if (cursor->nr < trace->min_stack) 2834 goto out; 2835 callchain_ret = 1; 2836 } 2837 } 2838 2839 trace__printf_interrupted_entry(trace); 2840 trace__fprintf_tstamp(trace, sample->time, trace->output); 2841 2842 if (trace->trace_syscalls && trace->show_duration) 2843 fprintf(trace->output, "( ): "); 2844 2845 if (thread) 2846 trace__fprintf_comm_tid(trace, thread, trace->output); 2847 2848 if (evsel == trace->syscalls.events.bpf_output) { 2849 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2850 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2851 2852 if (sc) { 2853 fprintf(trace->output, "%s(", sc->name); 2854 trace__fprintf_sys_enter(trace, evsel, sample); 2855 fputc(')', trace->output); 2856 goto newline; 2857 } 2858 2859 /* 2860 * XXX: Not having the associated syscall info or not finding/adding 2861 * the thread should never happen, but if it does... 2862 * fall thru and print it as a bpf_output event. 2863 */ 2864 } 2865 2866 fprintf(trace->output, "%s(", evsel->name); 2867 2868 if (evsel__is_bpf_output(evsel)) { 2869 bpf_output__fprintf(trace, sample); 2870 } else if (evsel->tp_format) { 2871 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2872 trace__fprintf_sys_enter(trace, evsel, sample)) { 2873 if (trace->libtraceevent_print) { 2874 event_format__fprintf(evsel->tp_format, sample->cpu, 2875 sample->raw_data, sample->raw_size, 2876 trace->output); 2877 } else { 2878 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); 2879 } 2880 } 2881 } 2882 2883 newline: 2884 fprintf(trace->output, ")\n"); 2885 2886 if (callchain_ret > 0) 2887 trace__fprintf_callchain(trace, sample); 2888 else if (callchain_ret < 0) 2889 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2890 2891 ++trace->nr_events_printed; 2892 2893 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2894 evsel__disable(evsel); 2895 evsel__close(evsel); 2896 } 2897 out: 2898 thread__put(thread); 2899 return 0; 2900 } 2901 2902 static void print_location(FILE *f, struct perf_sample *sample, 2903 struct addr_location *al, 2904 bool print_dso, bool print_sym) 2905 { 2906 2907 if ((verbose > 0 || print_dso) && al->map) 2908 fprintf(f, "%s@", map__dso(al->map)->long_name); 2909 2910 if ((verbose > 0 || print_sym) && al->sym) 2911 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2912 al->addr - al->sym->start); 2913 else if (al->map) 2914 fprintf(f, "0x%" PRIx64, al->addr); 2915 else 2916 fprintf(f, "0x%" PRIx64, sample->addr); 2917 } 2918 2919 static int trace__pgfault(struct trace *trace, 2920 struct evsel *evsel, 2921 union perf_event *event __maybe_unused, 2922 struct perf_sample *sample) 2923 { 2924 struct thread *thread; 2925 struct addr_location al; 2926 char map_type = 'd'; 2927 struct thread_trace *ttrace; 2928 int err = -1; 2929 int callchain_ret = 0; 2930 2931 addr_location__init(&al); 2932 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2933 2934 if (sample->callchain) { 2935 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2936 2937 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2938 if (callchain_ret == 0) { 2939 if (cursor->nr < trace->min_stack) 2940 goto out_put; 2941 callchain_ret = 1; 2942 } 2943 } 2944 2945 ttrace = thread__trace(thread, trace->output); 2946 if (ttrace == NULL) 2947 goto out_put; 2948 2949 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2950 ttrace->pfmaj++; 2951 else 2952 ttrace->pfmin++; 2953 2954 if (trace->summary_only) 2955 goto out; 2956 2957 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2958 2959 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2960 2961 fprintf(trace->output, "%sfault [", 2962 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2963 "maj" : "min"); 2964 2965 print_location(trace->output, sample, &al, false, true); 2966 2967 fprintf(trace->output, "] => "); 2968 2969 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2970 2971 if (!al.map) { 2972 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2973 2974 if (al.map) 2975 map_type = 'x'; 2976 else 2977 map_type = '?'; 2978 } 2979 2980 print_location(trace->output, sample, &al, true, false); 2981 2982 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2983 2984 if (callchain_ret > 0) 2985 trace__fprintf_callchain(trace, sample); 2986 else if (callchain_ret < 0) 2987 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2988 2989 ++trace->nr_events_printed; 2990 out: 2991 err = 0; 2992 out_put: 2993 thread__put(thread); 2994 addr_location__exit(&al); 2995 return err; 2996 } 2997 2998 static void trace__set_base_time(struct trace *trace, 2999 struct evsel *evsel, 3000 struct perf_sample *sample) 3001 { 3002 /* 3003 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 3004 * and don't use sample->time unconditionally, we may end up having 3005 * some other event in the future without PERF_SAMPLE_TIME for good 3006 * reason, i.e. we may not be interested in its timestamps, just in 3007 * it taking place, picking some piece of information when it 3008 * appears in our event stream (vfs_getname comes to mind). 3009 */ 3010 if (trace->base_time == 0 && !trace->full_time && 3011 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) 3012 trace->base_time = sample->time; 3013 } 3014 3015 static int trace__process_sample(struct perf_tool *tool, 3016 union perf_event *event, 3017 struct perf_sample *sample, 3018 struct evsel *evsel, 3019 struct machine *machine __maybe_unused) 3020 { 3021 struct trace *trace = container_of(tool, struct trace, tool); 3022 struct thread *thread; 3023 int err = 0; 3024 3025 tracepoint_handler handler = evsel->handler; 3026 3027 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 3028 if (thread && thread__is_filtered(thread)) 3029 goto out; 3030 3031 trace__set_base_time(trace, evsel, sample); 3032 3033 if (handler) { 3034 ++trace->nr_events; 3035 handler(trace, evsel, event, sample); 3036 } 3037 out: 3038 thread__put(thread); 3039 return err; 3040 } 3041 3042 static int trace__record(struct trace *trace, int argc, const char **argv) 3043 { 3044 unsigned int rec_argc, i, j; 3045 const char **rec_argv; 3046 const char * const record_args[] = { 3047 "record", 3048 "-R", 3049 "-m", "1024", 3050 "-c", "1", 3051 }; 3052 pid_t pid = getpid(); 3053 char *filter = asprintf__tp_filter_pids(1, &pid); 3054 const char * const sc_args[] = { "-e", }; 3055 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 3056 const char * const majpf_args[] = { "-e", "major-faults" }; 3057 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 3058 const char * const minpf_args[] = { "-e", "minor-faults" }; 3059 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 3060 int err = -1; 3061 3062 /* +3 is for the event string below and the pid filter */ 3063 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + 3064 majpf_args_nr + minpf_args_nr + argc; 3065 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 3066 3067 if (rec_argv == NULL || filter == NULL) 3068 goto out_free; 3069 3070 j = 0; 3071 for (i = 0; i < ARRAY_SIZE(record_args); i++) 3072 rec_argv[j++] = record_args[i]; 3073 3074 if (trace->trace_syscalls) { 3075 for (i = 0; i < sc_args_nr; i++) 3076 rec_argv[j++] = sc_args[i]; 3077 3078 /* event string may be different for older kernels - e.g., RHEL6 */ 3079 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 3080 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 3081 else if (is_valid_tracepoint("syscalls:sys_enter")) 3082 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 3083 else { 3084 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 3085 goto out_free; 3086 } 3087 } 3088 3089 rec_argv[j++] = "--filter"; 3090 rec_argv[j++] = filter; 3091 3092 if (trace->trace_pgfaults & TRACE_PFMAJ) 3093 for (i = 0; i < majpf_args_nr; i++) 3094 rec_argv[j++] = majpf_args[i]; 3095 3096 if (trace->trace_pgfaults & TRACE_PFMIN) 3097 for (i = 0; i < minpf_args_nr; i++) 3098 rec_argv[j++] = minpf_args[i]; 3099 3100 for (i = 0; i < (unsigned int)argc; i++) 3101 rec_argv[j++] = argv[i]; 3102 3103 err = cmd_record(j, rec_argv); 3104 out_free: 3105 free(filter); 3106 free(rec_argv); 3107 return err; 3108 } 3109 3110 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 3111 3112 static bool evlist__add_vfs_getname(struct evlist *evlist) 3113 { 3114 bool found = false; 3115 struct evsel *evsel, *tmp; 3116 struct parse_events_error err; 3117 int ret; 3118 3119 parse_events_error__init(&err); 3120 ret = parse_events(evlist, "probe:vfs_getname*", &err); 3121 parse_events_error__exit(&err); 3122 if (ret) 3123 return false; 3124 3125 evlist__for_each_entry_safe(evlist, evsel, tmp) { 3126 if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) 3127 continue; 3128 3129 if (evsel__field(evsel, "pathname")) { 3130 evsel->handler = trace__vfs_getname; 3131 found = true; 3132 continue; 3133 } 3134 3135 list_del_init(&evsel->core.node); 3136 evsel->evlist = NULL; 3137 evsel__delete(evsel); 3138 } 3139 3140 return found; 3141 } 3142 3143 static struct evsel *evsel__new_pgfault(u64 config) 3144 { 3145 struct evsel *evsel; 3146 struct perf_event_attr attr = { 3147 .type = PERF_TYPE_SOFTWARE, 3148 .mmap_data = 1, 3149 }; 3150 3151 attr.config = config; 3152 attr.sample_period = 1; 3153 3154 event_attr_init(&attr); 3155 3156 evsel = evsel__new(&attr); 3157 if (evsel) 3158 evsel->handler = trace__pgfault; 3159 3160 return evsel; 3161 } 3162 3163 static void evlist__free_syscall_tp_fields(struct evlist *evlist) 3164 { 3165 struct evsel *evsel; 3166 3167 evlist__for_each_entry(evlist, evsel) { 3168 evsel_trace__delete(evsel->priv); 3169 evsel->priv = NULL; 3170 } 3171 } 3172 3173 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 3174 { 3175 const u32 type = event->header.type; 3176 struct evsel *evsel; 3177 3178 if (type != PERF_RECORD_SAMPLE) { 3179 trace__process_event(trace, trace->host, event, sample); 3180 return; 3181 } 3182 3183 evsel = evlist__id2evsel(trace->evlist, sample->id); 3184 if (evsel == NULL) { 3185 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 3186 return; 3187 } 3188 3189 if (evswitch__discard(&trace->evswitch, evsel)) 3190 return; 3191 3192 trace__set_base_time(trace, evsel, sample); 3193 3194 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && 3195 sample->raw_data == NULL) { 3196 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 3197 evsel__name(evsel), sample->tid, 3198 sample->cpu, sample->raw_size); 3199 } else { 3200 tracepoint_handler handler = evsel->handler; 3201 handler(trace, evsel, event, sample); 3202 } 3203 3204 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 3205 interrupted = true; 3206 } 3207 3208 static int trace__add_syscall_newtp(struct trace *trace) 3209 { 3210 int ret = -1; 3211 struct evlist *evlist = trace->evlist; 3212 struct evsel *sys_enter, *sys_exit; 3213 3214 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 3215 if (sys_enter == NULL) 3216 goto out; 3217 3218 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 3219 goto out_delete_sys_enter; 3220 3221 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 3222 if (sys_exit == NULL) 3223 goto out_delete_sys_enter; 3224 3225 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 3226 goto out_delete_sys_exit; 3227 3228 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 3229 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 3230 3231 evlist__add(evlist, sys_enter); 3232 evlist__add(evlist, sys_exit); 3233 3234 if (callchain_param.enabled && !trace->kernel_syscallchains) { 3235 /* 3236 * We're interested only in the user space callchain 3237 * leading to the syscall, allow overriding that for 3238 * debugging reasons using --kernel_syscall_callchains 3239 */ 3240 sys_exit->core.attr.exclude_callchain_kernel = 1; 3241 } 3242 3243 trace->syscalls.events.sys_enter = sys_enter; 3244 trace->syscalls.events.sys_exit = sys_exit; 3245 3246 ret = 0; 3247 out: 3248 return ret; 3249 3250 out_delete_sys_exit: 3251 evsel__delete_priv(sys_exit); 3252 out_delete_sys_enter: 3253 evsel__delete_priv(sys_enter); 3254 goto out; 3255 } 3256 3257 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 3258 { 3259 int err = -1; 3260 struct evsel *sys_exit; 3261 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 3262 trace->ev_qualifier_ids.nr, 3263 trace->ev_qualifier_ids.entries); 3264 3265 if (filter == NULL) 3266 goto out_enomem; 3267 3268 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { 3269 sys_exit = trace->syscalls.events.sys_exit; 3270 err = evsel__append_tp_filter(sys_exit, filter); 3271 } 3272 3273 free(filter); 3274 out: 3275 return err; 3276 out_enomem: 3277 errno = ENOMEM; 3278 goto out; 3279 } 3280 3281 #ifdef HAVE_BPF_SKEL 3282 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) 3283 { 3284 struct bpf_program *pos, *prog = NULL; 3285 const char *sec_name; 3286 3287 if (trace->skel->obj == NULL) 3288 return NULL; 3289 3290 bpf_object__for_each_program(pos, trace->skel->obj) { 3291 sec_name = bpf_program__section_name(pos); 3292 if (sec_name && !strcmp(sec_name, name)) { 3293 prog = pos; 3294 break; 3295 } 3296 } 3297 3298 return prog; 3299 } 3300 3301 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, 3302 const char *prog_name, const char *type) 3303 { 3304 struct bpf_program *prog; 3305 3306 if (prog_name == NULL) { 3307 char default_prog_name[256]; 3308 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name); 3309 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3310 if (prog != NULL) 3311 goto out_found; 3312 if (sc->fmt && sc->fmt->alias) { 3313 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias); 3314 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3315 if (prog != NULL) 3316 goto out_found; 3317 } 3318 goto out_unaugmented; 3319 } 3320 3321 prog = trace__find_bpf_program_by_title(trace, prog_name); 3322 3323 if (prog != NULL) { 3324 out_found: 3325 return prog; 3326 } 3327 3328 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", 3329 prog_name, type, sc->name); 3330 out_unaugmented: 3331 return trace->skel->progs.syscall_unaugmented; 3332 } 3333 3334 static void trace__init_syscall_bpf_progs(struct trace *trace, int id) 3335 { 3336 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3337 3338 if (sc == NULL) 3339 return; 3340 3341 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3342 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); 3343 } 3344 3345 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) 3346 { 3347 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3348 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented); 3349 } 3350 3351 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) 3352 { 3353 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3354 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented); 3355 } 3356 3357 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) 3358 { 3359 struct tep_format_field *field, *candidate_field; 3360 int id; 3361 3362 /* 3363 * We're only interested in syscalls that have a pointer: 3364 */ 3365 for (field = sc->args; field; field = field->next) { 3366 if (field->flags & TEP_FIELD_IS_POINTER) 3367 goto try_to_find_pair; 3368 } 3369 3370 return NULL; 3371 3372 try_to_find_pair: 3373 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { 3374 struct syscall *pair = trace__syscall_info(trace, NULL, id); 3375 struct bpf_program *pair_prog; 3376 bool is_candidate = false; 3377 3378 if (pair == NULL || pair == sc || 3379 pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented) 3380 continue; 3381 3382 for (field = sc->args, candidate_field = pair->args; 3383 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 3384 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 3385 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 3386 3387 if (is_pointer) { 3388 if (!candidate_is_pointer) { 3389 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 3390 continue; 3391 } 3392 } else { 3393 if (candidate_is_pointer) { 3394 // The candidate might copy a pointer we don't have, skip it. 3395 goto next_candidate; 3396 } 3397 continue; 3398 } 3399 3400 if (strcmp(field->type, candidate_field->type)) 3401 goto next_candidate; 3402 3403 /* 3404 * This is limited in the BPF program but sys_write 3405 * uses "const char *" for its "buf" arg so we need to 3406 * use some heuristic that is kinda future proof... 3407 */ 3408 if (strcmp(field->type, "const char *") == 0 && 3409 !(strstr(field->name, "name") || 3410 strstr(field->name, "path") || 3411 strstr(field->name, "file") || 3412 strstr(field->name, "root") || 3413 strstr(field->name, "description"))) 3414 goto next_candidate; 3415 3416 is_candidate = true; 3417 } 3418 3419 if (!is_candidate) 3420 goto next_candidate; 3421 3422 /* 3423 * Check if the tentative pair syscall augmenter has more pointers, if it has, 3424 * then it may be collecting that and we then can't use it, as it would collect 3425 * more than what is common to the two syscalls. 3426 */ 3427 if (candidate_field) { 3428 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 3429 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 3430 goto next_candidate; 3431 } 3432 3433 pair_prog = pair->bpf_prog.sys_enter; 3434 /* 3435 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 3436 * have been searched for, so search it here and if it returns the 3437 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 3438 * program for a filtered syscall on a non-filtered one. 3439 * 3440 * For instance, we have "!syscalls:sys_enter_renameat" and that is 3441 * useful for "renameat2". 3442 */ 3443 if (pair_prog == NULL) { 3444 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3445 if (pair_prog == trace->skel->progs.syscall_unaugmented) 3446 goto next_candidate; 3447 } 3448 3449 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3450 return pair_prog; 3451 next_candidate: 3452 continue; 3453 } 3454 3455 return NULL; 3456 } 3457 3458 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3459 { 3460 int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter); 3461 int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit); 3462 int err = 0, key; 3463 3464 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3465 int prog_fd; 3466 3467 if (!trace__syscall_enabled(trace, key)) 3468 continue; 3469 3470 trace__init_syscall_bpf_progs(trace, key); 3471 3472 // It'll get at least the "!raw_syscalls:unaugmented" 3473 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3474 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3475 if (err) 3476 break; 3477 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3478 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3479 if (err) 3480 break; 3481 } 3482 3483 /* 3484 * Now lets do a second pass looking for enabled syscalls without 3485 * an augmenter that have a signature that is a superset of another 3486 * syscall with an augmenter so that we can auto-reuse it. 3487 * 3488 * I.e. if we have an augmenter for the "open" syscall that has 3489 * this signature: 3490 * 3491 * int open(const char *pathname, int flags, mode_t mode); 3492 * 3493 * I.e. that will collect just the first string argument, then we 3494 * can reuse it for the 'creat' syscall, that has this signature: 3495 * 3496 * int creat(const char *pathname, mode_t mode); 3497 * 3498 * and for: 3499 * 3500 * int stat(const char *pathname, struct stat *statbuf); 3501 * int lstat(const char *pathname, struct stat *statbuf); 3502 * 3503 * Because the 'open' augmenter will collect the first arg as a string, 3504 * and leave alone all the other args, which already helps with 3505 * beautifying 'stat' and 'lstat''s pathname arg. 3506 * 3507 * Then, in time, when 'stat' gets an augmenter that collects both 3508 * first and second arg (this one on the raw_syscalls:sys_exit prog 3509 * array tail call, then that one will be used. 3510 */ 3511 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3512 struct syscall *sc = trace__syscall_info(trace, NULL, key); 3513 struct bpf_program *pair_prog; 3514 int prog_fd; 3515 3516 if (sc == NULL || sc->bpf_prog.sys_enter == NULL) 3517 continue; 3518 3519 /* 3520 * For now we're just reusing the sys_enter prog, and if it 3521 * already has an augmenter, we don't need to find one. 3522 */ 3523 if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented) 3524 continue; 3525 3526 /* 3527 * Look at all the other syscalls for one that has a signature 3528 * that is close enough that we can share: 3529 */ 3530 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); 3531 if (pair_prog == NULL) 3532 continue; 3533 3534 sc->bpf_prog.sys_enter = pair_prog; 3535 3536 /* 3537 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter 3538 * with the fd for the program we're reusing: 3539 */ 3540 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); 3541 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3542 if (err) 3543 break; 3544 } 3545 3546 return err; 3547 } 3548 #endif // HAVE_BPF_SKEL 3549 3550 static int trace__set_ev_qualifier_filter(struct trace *trace) 3551 { 3552 if (trace->syscalls.events.sys_enter) 3553 return trace__set_ev_qualifier_tp_filter(trace); 3554 return 0; 3555 } 3556 3557 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 3558 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 3559 { 3560 int err = 0; 3561 #ifdef HAVE_LIBBPF_SUPPORT 3562 bool value = true; 3563 int map_fd = bpf_map__fd(map); 3564 size_t i; 3565 3566 for (i = 0; i < npids; ++i) { 3567 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 3568 if (err) 3569 break; 3570 } 3571 #endif 3572 return err; 3573 } 3574 3575 static int trace__set_filter_loop_pids(struct trace *trace) 3576 { 3577 unsigned int nr = 1, err; 3578 pid_t pids[32] = { 3579 getpid(), 3580 }; 3581 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 3582 3583 while (thread && nr < ARRAY_SIZE(pids)) { 3584 struct thread *parent = machine__find_thread(trace->host, 3585 thread__ppid(thread), 3586 thread__ppid(thread)); 3587 3588 if (parent == NULL) 3589 break; 3590 3591 if (!strcmp(thread__comm_str(parent), "sshd") || 3592 strstarts(thread__comm_str(parent), "gnome-terminal")) { 3593 pids[nr++] = thread__tid(parent); 3594 break; 3595 } 3596 thread = parent; 3597 } 3598 3599 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); 3600 if (!err && trace->filter_pids.map) 3601 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 3602 3603 return err; 3604 } 3605 3606 static int trace__set_filter_pids(struct trace *trace) 3607 { 3608 int err = 0; 3609 /* 3610 * Better not use !target__has_task() here because we need to cover the 3611 * case where no threads were specified in the command line, but a 3612 * workload was, and in that case we will fill in the thread_map when 3613 * we fork the workload in evlist__prepare_workload. 3614 */ 3615 if (trace->filter_pids.nr > 0) { 3616 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 3617 trace->filter_pids.entries); 3618 if (!err && trace->filter_pids.map) { 3619 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 3620 trace->filter_pids.entries); 3621 } 3622 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { 3623 err = trace__set_filter_loop_pids(trace); 3624 } 3625 3626 return err; 3627 } 3628 3629 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 3630 { 3631 struct evlist *evlist = trace->evlist; 3632 struct perf_sample sample; 3633 int err = evlist__parse_sample(evlist, event, &sample); 3634 3635 if (err) 3636 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 3637 else 3638 trace__handle_event(trace, event, &sample); 3639 3640 return 0; 3641 } 3642 3643 static int __trace__flush_events(struct trace *trace) 3644 { 3645 u64 first = ordered_events__first_time(&trace->oe.data); 3646 u64 flush = trace->oe.last - NSEC_PER_SEC; 3647 3648 /* Is there some thing to flush.. */ 3649 if (first && first < flush) 3650 return ordered_events__flush_time(&trace->oe.data, flush); 3651 3652 return 0; 3653 } 3654 3655 static int trace__flush_events(struct trace *trace) 3656 { 3657 return !trace->sort_events ? 0 : __trace__flush_events(trace); 3658 } 3659 3660 static int trace__deliver_event(struct trace *trace, union perf_event *event) 3661 { 3662 int err; 3663 3664 if (!trace->sort_events) 3665 return __trace__deliver_event(trace, event); 3666 3667 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 3668 if (err && err != -1) 3669 return err; 3670 3671 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); 3672 if (err) 3673 return err; 3674 3675 return trace__flush_events(trace); 3676 } 3677 3678 static int ordered_events__deliver_event(struct ordered_events *oe, 3679 struct ordered_event *event) 3680 { 3681 struct trace *trace = container_of(oe, struct trace, oe.data); 3682 3683 return __trace__deliver_event(trace, event->event); 3684 } 3685 3686 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) 3687 { 3688 struct tep_format_field *field; 3689 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); 3690 3691 if (evsel->tp_format == NULL || fmt == NULL) 3692 return NULL; 3693 3694 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) 3695 if (strcmp(field->name, arg) == 0) 3696 return fmt; 3697 3698 return NULL; 3699 } 3700 3701 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) 3702 { 3703 char *tok, *left = evsel->filter, *new_filter = evsel->filter; 3704 3705 while ((tok = strpbrk(left, "=<>!")) != NULL) { 3706 char *right = tok + 1, *right_end; 3707 3708 if (*right == '=') 3709 ++right; 3710 3711 while (isspace(*right)) 3712 ++right; 3713 3714 if (*right == '\0') 3715 break; 3716 3717 while (!isalpha(*left)) 3718 if (++left == tok) { 3719 /* 3720 * Bail out, can't find the name of the argument that is being 3721 * used in the filter, let it try to set this filter, will fail later. 3722 */ 3723 return 0; 3724 } 3725 3726 right_end = right + 1; 3727 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') 3728 ++right_end; 3729 3730 if (isalpha(*right)) { 3731 struct syscall_arg_fmt *fmt; 3732 int left_size = tok - left, 3733 right_size = right_end - right; 3734 char arg[128]; 3735 3736 while (isspace(left[left_size - 1])) 3737 --left_size; 3738 3739 scnprintf(arg, sizeof(arg), "%.*s", left_size, left); 3740 3741 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); 3742 if (fmt == NULL) { 3743 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", 3744 arg, evsel->name, evsel->filter); 3745 return -1; 3746 } 3747 3748 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", 3749 arg, (int)(right - tok), tok, right_size, right); 3750 3751 if (fmt->strtoul) { 3752 u64 val; 3753 struct syscall_arg syscall_arg = { 3754 .parm = fmt->parm, 3755 }; 3756 3757 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { 3758 char *n, expansion[19]; 3759 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); 3760 int expansion_offset = right - new_filter; 3761 3762 pr_debug("%s", expansion); 3763 3764 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { 3765 pr_debug(" out of memory!\n"); 3766 free(new_filter); 3767 return -1; 3768 } 3769 if (new_filter != evsel->filter) 3770 free(new_filter); 3771 left = n + expansion_offset + expansion_lenght; 3772 new_filter = n; 3773 } else { 3774 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3775 right_size, right, arg, evsel->name, evsel->filter); 3776 return -1; 3777 } 3778 } else { 3779 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3780 arg, evsel->name, evsel->filter); 3781 return -1; 3782 } 3783 3784 pr_debug("\n"); 3785 } else { 3786 left = right_end; 3787 } 3788 } 3789 3790 if (new_filter != evsel->filter) { 3791 pr_debug("New filter for %s: %s\n", evsel->name, new_filter); 3792 evsel__set_filter(evsel, new_filter); 3793 free(new_filter); 3794 } 3795 3796 return 0; 3797 } 3798 3799 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) 3800 { 3801 struct evlist *evlist = trace->evlist; 3802 struct evsel *evsel; 3803 3804 evlist__for_each_entry(evlist, evsel) { 3805 if (evsel->filter == NULL) 3806 continue; 3807 3808 if (trace__expand_filter(trace, evsel)) { 3809 *err_evsel = evsel; 3810 return -1; 3811 } 3812 } 3813 3814 return 0; 3815 } 3816 3817 static int trace__run(struct trace *trace, int argc, const char **argv) 3818 { 3819 struct evlist *evlist = trace->evlist; 3820 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 3821 int err = -1, i; 3822 unsigned long before; 3823 const bool forks = argc > 0; 3824 bool draining = false; 3825 3826 trace->live = true; 3827 3828 if (!trace->raw_augmented_syscalls) { 3829 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 3830 goto out_error_raw_syscalls; 3831 3832 if (trace->trace_syscalls) 3833 trace->vfs_getname = evlist__add_vfs_getname(evlist); 3834 } 3835 3836 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 3837 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 3838 if (pgfault_maj == NULL) 3839 goto out_error_mem; 3840 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 3841 evlist__add(evlist, pgfault_maj); 3842 } 3843 3844 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 3845 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 3846 if (pgfault_min == NULL) 3847 goto out_error_mem; 3848 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 3849 evlist__add(evlist, pgfault_min); 3850 } 3851 3852 /* Enable ignoring missing threads when -u/-p option is defined. */ 3853 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid; 3854 3855 if (trace->sched && 3856 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) 3857 goto out_error_sched_stat_runtime; 3858 /* 3859 * If a global cgroup was set, apply it to all the events without an 3860 * explicit cgroup. I.e.: 3861 * 3862 * trace -G A -e sched:*switch 3863 * 3864 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 3865 * _and_ sched:sched_switch to the 'A' cgroup, while: 3866 * 3867 * trace -e sched:*switch -G A 3868 * 3869 * will only set the sched:sched_switch event to the 'A' cgroup, all the 3870 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3871 * a cgroup (on the root cgroup, sys wide, etc). 3872 * 3873 * Multiple cgroups: 3874 * 3875 * trace -G A -e sched:*switch -G B 3876 * 3877 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3878 * to the 'B' cgroup. 3879 * 3880 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3881 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3882 */ 3883 if (trace->cgroup) 3884 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3885 3886 err = evlist__create_maps(evlist, &trace->opts.target); 3887 if (err < 0) { 3888 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3889 goto out_delete_evlist; 3890 } 3891 3892 err = trace__symbols_init(trace, evlist); 3893 if (err < 0) { 3894 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3895 goto out_delete_evlist; 3896 } 3897 3898 evlist__config(evlist, &trace->opts, &callchain_param); 3899 3900 if (forks) { 3901 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL); 3902 if (err < 0) { 3903 fprintf(trace->output, "Couldn't run the workload!\n"); 3904 goto out_delete_evlist; 3905 } 3906 workload_pid = evlist->workload.pid; 3907 } 3908 3909 err = evlist__open(evlist); 3910 if (err < 0) 3911 goto out_error_open; 3912 #ifdef HAVE_BPF_SKEL 3913 if (trace->syscalls.events.bpf_output) { 3914 struct perf_cpu cpu; 3915 3916 /* 3917 * Set up the __augmented_syscalls__ BPF map to hold for each 3918 * CPU the bpf-output event's file descriptor. 3919 */ 3920 perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) { 3921 bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__, 3922 &cpu.cpu, sizeof(int), 3923 xyarray__entry(trace->syscalls.events.bpf_output->core.fd, 3924 cpu.cpu, 0), 3925 sizeof(__u32), BPF_ANY); 3926 } 3927 } 3928 #endif 3929 err = trace__set_filter_pids(trace); 3930 if (err < 0) 3931 goto out_error_mem; 3932 3933 #ifdef HAVE_BPF_SKEL 3934 if (trace->skel && trace->skel->progs.sys_enter) 3935 trace__init_syscalls_bpf_prog_array_maps(trace); 3936 #endif 3937 3938 if (trace->ev_qualifier_ids.nr > 0) { 3939 err = trace__set_ev_qualifier_filter(trace); 3940 if (err < 0) 3941 goto out_errno; 3942 3943 if (trace->syscalls.events.sys_exit) { 3944 pr_debug("event qualifier tracepoint filter: %s\n", 3945 trace->syscalls.events.sys_exit->filter); 3946 } 3947 } 3948 3949 /* 3950 * If the "close" syscall is not traced, then we will not have the 3951 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the 3952 * fd->pathname table and were ending up showing the last value set by 3953 * syscalls opening a pathname and associating it with a descriptor or 3954 * reading it from /proc/pid/fd/ in cases where that doesn't make 3955 * sense. 3956 * 3957 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is 3958 * not in use. 3959 */ 3960 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); 3961 3962 err = trace__expand_filters(trace, &evsel); 3963 if (err) 3964 goto out_delete_evlist; 3965 err = evlist__apply_filters(evlist, &evsel); 3966 if (err < 0) 3967 goto out_error_apply_filters; 3968 3969 err = evlist__mmap(evlist, trace->opts.mmap_pages); 3970 if (err < 0) 3971 goto out_error_mmap; 3972 3973 if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay) 3974 evlist__enable(evlist); 3975 3976 if (forks) 3977 evlist__start_workload(evlist); 3978 3979 if (trace->opts.target.initial_delay) { 3980 usleep(trace->opts.target.initial_delay * 1000); 3981 evlist__enable(evlist); 3982 } 3983 3984 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || 3985 perf_thread_map__nr(evlist->core.threads) > 1 || 3986 evlist__first(evlist)->core.attr.inherit; 3987 3988 /* 3989 * Now that we already used evsel->core.attr to ask the kernel to setup the 3990 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in 3991 * trace__resolve_callchain(), allowing per-event max-stack settings 3992 * to override an explicitly set --max-stack global setting. 3993 */ 3994 evlist__for_each_entry(evlist, evsel) { 3995 if (evsel__has_callchain(evsel) && 3996 evsel->core.attr.sample_max_stack == 0) 3997 evsel->core.attr.sample_max_stack = trace->max_stack; 3998 } 3999 again: 4000 before = trace->nr_events; 4001 4002 for (i = 0; i < evlist->core.nr_mmaps; i++) { 4003 union perf_event *event; 4004 struct mmap *md; 4005 4006 md = &evlist->mmap[i]; 4007 if (perf_mmap__read_init(&md->core) < 0) 4008 continue; 4009 4010 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 4011 ++trace->nr_events; 4012 4013 err = trace__deliver_event(trace, event); 4014 if (err) 4015 goto out_disable; 4016 4017 perf_mmap__consume(&md->core); 4018 4019 if (interrupted) 4020 goto out_disable; 4021 4022 if (done && !draining) { 4023 evlist__disable(evlist); 4024 draining = true; 4025 } 4026 } 4027 perf_mmap__read_done(&md->core); 4028 } 4029 4030 if (trace->nr_events == before) { 4031 int timeout = done ? 100 : -1; 4032 4033 if (!draining && evlist__poll(evlist, timeout) > 0) { 4034 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 4035 draining = true; 4036 4037 goto again; 4038 } else { 4039 if (trace__flush_events(trace)) 4040 goto out_disable; 4041 } 4042 } else { 4043 goto again; 4044 } 4045 4046 out_disable: 4047 thread__zput(trace->current); 4048 4049 evlist__disable(evlist); 4050 4051 if (trace->sort_events) 4052 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 4053 4054 if (!err) { 4055 if (trace->summary) 4056 trace__fprintf_thread_summary(trace, trace->output); 4057 4058 if (trace->show_tool_stats) { 4059 fprintf(trace->output, "Stats:\n " 4060 " vfs_getname : %" PRIu64 "\n" 4061 " proc_getname: %" PRIu64 "\n", 4062 trace->stats.vfs_getname, 4063 trace->stats.proc_getname); 4064 } 4065 } 4066 4067 out_delete_evlist: 4068 trace__symbols__exit(trace); 4069 evlist__free_syscall_tp_fields(evlist); 4070 evlist__delete(evlist); 4071 cgroup__put(trace->cgroup); 4072 trace->evlist = NULL; 4073 trace->live = false; 4074 return err; 4075 { 4076 char errbuf[BUFSIZ]; 4077 4078 out_error_sched_stat_runtime: 4079 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 4080 goto out_error; 4081 4082 out_error_raw_syscalls: 4083 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 4084 goto out_error; 4085 4086 out_error_mmap: 4087 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 4088 goto out_error; 4089 4090 out_error_open: 4091 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 4092 4093 out_error: 4094 fprintf(trace->output, "%s\n", errbuf); 4095 goto out_delete_evlist; 4096 4097 out_error_apply_filters: 4098 fprintf(trace->output, 4099 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 4100 evsel->filter, evsel__name(evsel), errno, 4101 str_error_r(errno, errbuf, sizeof(errbuf))); 4102 goto out_delete_evlist; 4103 } 4104 out_error_mem: 4105 fprintf(trace->output, "Not enough memory to run!\n"); 4106 goto out_delete_evlist; 4107 4108 out_errno: 4109 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 4110 goto out_delete_evlist; 4111 } 4112 4113 static int trace__replay(struct trace *trace) 4114 { 4115 const struct evsel_str_handler handlers[] = { 4116 { "probe:vfs_getname", trace__vfs_getname, }, 4117 }; 4118 struct perf_data data = { 4119 .path = input_name, 4120 .mode = PERF_DATA_MODE_READ, 4121 .force = trace->force, 4122 }; 4123 struct perf_session *session; 4124 struct evsel *evsel; 4125 int err = -1; 4126 4127 trace->tool.sample = trace__process_sample; 4128 trace->tool.mmap = perf_event__process_mmap; 4129 trace->tool.mmap2 = perf_event__process_mmap2; 4130 trace->tool.comm = perf_event__process_comm; 4131 trace->tool.exit = perf_event__process_exit; 4132 trace->tool.fork = perf_event__process_fork; 4133 trace->tool.attr = perf_event__process_attr; 4134 trace->tool.tracing_data = perf_event__process_tracing_data; 4135 trace->tool.build_id = perf_event__process_build_id; 4136 trace->tool.namespaces = perf_event__process_namespaces; 4137 4138 trace->tool.ordered_events = true; 4139 trace->tool.ordering_requires_timestamps = true; 4140 4141 /* add tid to output */ 4142 trace->multiple_threads = true; 4143 4144 session = perf_session__new(&data, &trace->tool); 4145 if (IS_ERR(session)) 4146 return PTR_ERR(session); 4147 4148 if (trace->opts.target.pid) 4149 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 4150 4151 if (trace->opts.target.tid) 4152 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 4153 4154 if (symbol__init(&session->header.env) < 0) 4155 goto out; 4156 4157 trace->host = &session->machines.host; 4158 4159 err = perf_session__set_tracepoints_handlers(session, handlers); 4160 if (err) 4161 goto out; 4162 4163 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); 4164 trace->syscalls.events.sys_enter = evsel; 4165 /* older kernels have syscalls tp versus raw_syscalls */ 4166 if (evsel == NULL) 4167 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); 4168 4169 if (evsel && 4170 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 4171 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 4172 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 4173 goto out; 4174 } 4175 4176 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); 4177 trace->syscalls.events.sys_exit = evsel; 4178 if (evsel == NULL) 4179 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); 4180 if (evsel && 4181 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 4182 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 4183 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 4184 goto out; 4185 } 4186 4187 evlist__for_each_entry(session->evlist, evsel) { 4188 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && 4189 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 4190 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 4191 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 4192 evsel->handler = trace__pgfault; 4193 } 4194 4195 setup_pager(); 4196 4197 err = perf_session__process_events(session); 4198 if (err) 4199 pr_err("Failed to process events, error %d", err); 4200 4201 else if (trace->summary) 4202 trace__fprintf_thread_summary(trace, trace->output); 4203 4204 out: 4205 perf_session__delete(session); 4206 4207 return err; 4208 } 4209 4210 static size_t trace__fprintf_threads_header(FILE *fp) 4211 { 4212 size_t printed; 4213 4214 printed = fprintf(fp, "\n Summary of events:\n\n"); 4215 4216 return printed; 4217 } 4218 4219 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 4220 struct syscall_stats *stats; 4221 double msecs; 4222 int syscall; 4223 ) 4224 { 4225 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 4226 struct syscall_stats *stats = source->priv; 4227 4228 entry->syscall = source->i; 4229 entry->stats = stats; 4230 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; 4231 } 4232 4233 static size_t thread__dump_stats(struct thread_trace *ttrace, 4234 struct trace *trace, FILE *fp) 4235 { 4236 size_t printed = 0; 4237 struct syscall *sc; 4238 struct rb_node *nd; 4239 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 4240 4241 if (syscall_stats == NULL) 4242 return 0; 4243 4244 printed += fprintf(fp, "\n"); 4245 4246 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); 4247 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 4248 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); 4249 4250 resort_rb__for_each_entry(nd, syscall_stats) { 4251 struct syscall_stats *stats = syscall_stats_entry->stats; 4252 if (stats) { 4253 double min = (double)(stats->stats.min) / NSEC_PER_MSEC; 4254 double max = (double)(stats->stats.max) / NSEC_PER_MSEC; 4255 double avg = avg_stats(&stats->stats); 4256 double pct; 4257 u64 n = (u64)stats->stats.n; 4258 4259 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; 4260 avg /= NSEC_PER_MSEC; 4261 4262 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 4263 printed += fprintf(fp, " %-15s", sc->name); 4264 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", 4265 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); 4266 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 4267 4268 if (trace->errno_summary && stats->nr_failures) { 4269 int e; 4270 4271 for (e = 0; e < stats->max_errno; ++e) { 4272 if (stats->errnos[e] != 0) 4273 fprintf(fp, "\t\t\t\t%s: %d\n", perf_env__arch_strerrno(trace->host->env, e + 1), stats->errnos[e]); 4274 } 4275 } 4276 } 4277 } 4278 4279 resort_rb__delete(syscall_stats); 4280 printed += fprintf(fp, "\n\n"); 4281 4282 return printed; 4283 } 4284 4285 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 4286 { 4287 size_t printed = 0; 4288 struct thread_trace *ttrace = thread__priv(thread); 4289 double ratio; 4290 4291 if (ttrace == NULL) 4292 return 0; 4293 4294 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 4295 4296 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread)); 4297 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 4298 printed += fprintf(fp, "%.1f%%", ratio); 4299 if (ttrace->pfmaj) 4300 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 4301 if (ttrace->pfmin) 4302 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 4303 if (trace->sched) 4304 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 4305 else if (fputc('\n', fp) != EOF) 4306 ++printed; 4307 4308 printed += thread__dump_stats(ttrace, trace, fp); 4309 4310 return printed; 4311 } 4312 4313 static unsigned long thread__nr_events(struct thread_trace *ttrace) 4314 { 4315 return ttrace ? ttrace->nr_events : 0; 4316 } 4317 4318 static int trace_nr_events_cmp(void *priv __maybe_unused, 4319 const struct list_head *la, 4320 const struct list_head *lb) 4321 { 4322 struct thread_list *a = list_entry(la, struct thread_list, list); 4323 struct thread_list *b = list_entry(lb, struct thread_list, list); 4324 unsigned long a_nr_events = thread__nr_events(thread__priv(a->thread)); 4325 unsigned long b_nr_events = thread__nr_events(thread__priv(b->thread)); 4326 4327 if (a_nr_events != b_nr_events) 4328 return a_nr_events < b_nr_events ? -1 : 1; 4329 4330 /* Identical number of threads, place smaller tids first. */ 4331 return thread__tid(a->thread) < thread__tid(b->thread) 4332 ? -1 4333 : (thread__tid(a->thread) > thread__tid(b->thread) ? 1 : 0); 4334 } 4335 4336 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 4337 { 4338 size_t printed = trace__fprintf_threads_header(fp); 4339 LIST_HEAD(threads); 4340 4341 if (machine__thread_list(trace->host, &threads) == 0) { 4342 struct thread_list *pos; 4343 4344 list_sort(NULL, &threads, trace_nr_events_cmp); 4345 4346 list_for_each_entry(pos, &threads, list) 4347 printed += trace__fprintf_thread(fp, pos->thread, trace); 4348 } 4349 thread_list__delete(&threads); 4350 return printed; 4351 } 4352 4353 static int trace__set_duration(const struct option *opt, const char *str, 4354 int unset __maybe_unused) 4355 { 4356 struct trace *trace = opt->value; 4357 4358 trace->duration_filter = atof(str); 4359 return 0; 4360 } 4361 4362 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 4363 int unset __maybe_unused) 4364 { 4365 int ret = -1; 4366 size_t i; 4367 struct trace *trace = opt->value; 4368 /* 4369 * FIXME: introduce a intarray class, plain parse csv and create a 4370 * { int nr, int entries[] } struct... 4371 */ 4372 struct intlist *list = intlist__new(str); 4373 4374 if (list == NULL) 4375 return -1; 4376 4377 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 4378 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 4379 4380 if (trace->filter_pids.entries == NULL) 4381 goto out; 4382 4383 trace->filter_pids.entries[0] = getpid(); 4384 4385 for (i = 1; i < trace->filter_pids.nr; ++i) 4386 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 4387 4388 intlist__delete(list); 4389 ret = 0; 4390 out: 4391 return ret; 4392 } 4393 4394 static int trace__open_output(struct trace *trace, const char *filename) 4395 { 4396 struct stat st; 4397 4398 if (!stat(filename, &st) && st.st_size) { 4399 char oldname[PATH_MAX]; 4400 4401 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 4402 unlink(oldname); 4403 rename(filename, oldname); 4404 } 4405 4406 trace->output = fopen(filename, "w"); 4407 4408 return trace->output == NULL ? -errno : 0; 4409 } 4410 4411 static int parse_pagefaults(const struct option *opt, const char *str, 4412 int unset __maybe_unused) 4413 { 4414 int *trace_pgfaults = opt->value; 4415 4416 if (strcmp(str, "all") == 0) 4417 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 4418 else if (strcmp(str, "maj") == 0) 4419 *trace_pgfaults |= TRACE_PFMAJ; 4420 else if (strcmp(str, "min") == 0) 4421 *trace_pgfaults |= TRACE_PFMIN; 4422 else 4423 return -1; 4424 4425 return 0; 4426 } 4427 4428 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) 4429 { 4430 struct evsel *evsel; 4431 4432 evlist__for_each_entry(evlist, evsel) { 4433 if (evsel->handler == NULL) 4434 evsel->handler = handler; 4435 } 4436 } 4437 4438 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) 4439 { 4440 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 4441 4442 if (fmt) { 4443 const struct syscall_fmt *scfmt = syscall_fmt__find(name); 4444 4445 if (scfmt) { 4446 int skip = 0; 4447 4448 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || 4449 strcmp(evsel->tp_format->format.fields->name, "nr") == 0) 4450 ++skip; 4451 4452 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); 4453 } 4454 } 4455 } 4456 4457 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 4458 { 4459 struct evsel *evsel; 4460 4461 evlist__for_each_entry(evlist, evsel) { 4462 if (evsel->priv || !evsel->tp_format) 4463 continue; 4464 4465 if (strcmp(evsel->tp_format->system, "syscalls")) { 4466 evsel__init_tp_arg_scnprintf(evsel); 4467 continue; 4468 } 4469 4470 if (evsel__init_syscall_tp(evsel)) 4471 return -1; 4472 4473 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 4474 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4475 4476 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 4477 return -1; 4478 4479 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); 4480 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 4481 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4482 4483 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 4484 return -1; 4485 4486 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); 4487 } 4488 } 4489 4490 return 0; 4491 } 4492 4493 /* 4494 * XXX: Hackish, just splitting the combined -e+--event (syscalls 4495 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 4496 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 4497 * 4498 * It'd be better to introduce a parse_options() variant that would return a 4499 * list with the terms it didn't match to an event... 4500 */ 4501 static int trace__parse_events_option(const struct option *opt, const char *str, 4502 int unset __maybe_unused) 4503 { 4504 struct trace *trace = (struct trace *)opt->value; 4505 const char *s = str; 4506 char *sep = NULL, *lists[2] = { NULL, NULL, }; 4507 int len = strlen(str) + 1, err = -1, list, idx; 4508 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 4509 char group_name[PATH_MAX]; 4510 const struct syscall_fmt *fmt; 4511 4512 if (strace_groups_dir == NULL) 4513 return -1; 4514 4515 if (*s == '!') { 4516 ++s; 4517 trace->not_ev_qualifier = true; 4518 } 4519 4520 while (1) { 4521 if ((sep = strchr(s, ',')) != NULL) 4522 *sep = '\0'; 4523 4524 list = 0; 4525 if (syscalltbl__id(trace->sctbl, s) >= 0 || 4526 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 4527 list = 1; 4528 goto do_concat; 4529 } 4530 4531 fmt = syscall_fmt__find_by_alias(s); 4532 if (fmt != NULL) { 4533 list = 1; 4534 s = fmt->name; 4535 } else { 4536 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 4537 if (access(group_name, R_OK) == 0) 4538 list = 1; 4539 } 4540 do_concat: 4541 if (lists[list]) { 4542 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 4543 } else { 4544 lists[list] = malloc(len); 4545 if (lists[list] == NULL) 4546 goto out; 4547 strcpy(lists[list], s); 4548 } 4549 4550 if (!sep) 4551 break; 4552 4553 *sep = ','; 4554 s = sep + 1; 4555 } 4556 4557 if (lists[1] != NULL) { 4558 struct strlist_config slist_config = { 4559 .dirname = strace_groups_dir, 4560 }; 4561 4562 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 4563 if (trace->ev_qualifier == NULL) { 4564 fputs("Not enough memory to parse event qualifier", trace->output); 4565 goto out; 4566 } 4567 4568 if (trace__validate_ev_qualifier(trace)) 4569 goto out; 4570 trace->trace_syscalls = true; 4571 } 4572 4573 err = 0; 4574 4575 if (lists[0]) { 4576 struct parse_events_option_args parse_events_option_args = { 4577 .evlistp = &trace->evlist, 4578 }; 4579 struct option o = { 4580 .value = &parse_events_option_args, 4581 }; 4582 err = parse_events_option(&o, lists[0], 0); 4583 } 4584 out: 4585 free(strace_groups_dir); 4586 free(lists[0]); 4587 free(lists[1]); 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 struct option o = { 4600 .value = &trace->evlist, 4601 }; 4602 return parse_cgroups(&o, str, unset); 4603 } 4604 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4605 4606 return 0; 4607 } 4608 4609 static int trace__config(const char *var, const char *value, void *arg) 4610 { 4611 struct trace *trace = arg; 4612 int err = 0; 4613 4614 if (!strcmp(var, "trace.add_events")) { 4615 trace->perfconfig_events = strdup(value); 4616 if (trace->perfconfig_events == NULL) { 4617 pr_err("Not enough memory for %s\n", "trace.add_events"); 4618 return -1; 4619 } 4620 } else if (!strcmp(var, "trace.show_timestamp")) { 4621 trace->show_tstamp = perf_config_bool(var, value); 4622 } else if (!strcmp(var, "trace.show_duration")) { 4623 trace->show_duration = perf_config_bool(var, value); 4624 } else if (!strcmp(var, "trace.show_arg_names")) { 4625 trace->show_arg_names = perf_config_bool(var, value); 4626 if (!trace->show_arg_names) 4627 trace->show_zeros = true; 4628 } else if (!strcmp(var, "trace.show_zeros")) { 4629 bool new_show_zeros = perf_config_bool(var, value); 4630 if (!trace->show_arg_names && !new_show_zeros) { 4631 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4632 goto out; 4633 } 4634 trace->show_zeros = new_show_zeros; 4635 } else if (!strcmp(var, "trace.show_prefix")) { 4636 trace->show_string_prefix = perf_config_bool(var, value); 4637 } else if (!strcmp(var, "trace.no_inherit")) { 4638 trace->opts.no_inherit = perf_config_bool(var, value); 4639 } else if (!strcmp(var, "trace.args_alignment")) { 4640 int args_alignment = 0; 4641 if (perf_config_int(&args_alignment, var, value) == 0) 4642 trace->args_alignment = args_alignment; 4643 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { 4644 if (strcasecmp(value, "libtraceevent") == 0) 4645 trace->libtraceevent_print = true; 4646 else if (strcasecmp(value, "libbeauty") == 0) 4647 trace->libtraceevent_print = false; 4648 } 4649 out: 4650 return err; 4651 } 4652 4653 static void trace__exit(struct trace *trace) 4654 { 4655 int i; 4656 4657 strlist__delete(trace->ev_qualifier); 4658 zfree(&trace->ev_qualifier_ids.entries); 4659 if (trace->syscalls.table) { 4660 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) 4661 syscall__exit(&trace->syscalls.table[i]); 4662 zfree(&trace->syscalls.table); 4663 } 4664 syscalltbl__delete(trace->sctbl); 4665 zfree(&trace->perfconfig_events); 4666 } 4667 4668 #ifdef HAVE_BPF_SKEL 4669 static int bpf__setup_bpf_output(struct evlist *evlist) 4670 { 4671 int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/"); 4672 4673 if (err) 4674 pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n"); 4675 4676 return err; 4677 } 4678 #endif 4679 4680 int cmd_trace(int argc, const char **argv) 4681 { 4682 const char *trace_usage[] = { 4683 "perf trace [<options>] [<command>]", 4684 "perf trace [<options>] -- <command> [<options>]", 4685 "perf trace record [<options>] [<command>]", 4686 "perf trace record [<options>] -- <command> [<options>]", 4687 NULL 4688 }; 4689 struct trace trace = { 4690 .opts = { 4691 .target = { 4692 .uid = UINT_MAX, 4693 .uses_mmap = true, 4694 }, 4695 .user_freq = UINT_MAX, 4696 .user_interval = ULLONG_MAX, 4697 .no_buffering = true, 4698 .mmap_pages = UINT_MAX, 4699 }, 4700 .output = stderr, 4701 .show_comm = true, 4702 .show_tstamp = true, 4703 .show_duration = true, 4704 .show_arg_names = true, 4705 .args_alignment = 70, 4706 .trace_syscalls = false, 4707 .kernel_syscallchains = false, 4708 .max_stack = UINT_MAX, 4709 .max_events = ULONG_MAX, 4710 }; 4711 const char *output_name = NULL; 4712 const struct option trace_options[] = { 4713 OPT_CALLBACK('e', "event", &trace, "event", 4714 "event/syscall selector. use 'perf list' to list available events", 4715 trace__parse_events_option), 4716 OPT_CALLBACK(0, "filter", &trace.evlist, "filter", 4717 "event filter", parse_filter), 4718 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4719 "show the thread COMM next to its id"), 4720 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4721 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4722 trace__parse_events_option), 4723 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4724 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4725 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4726 "trace events on existing process id"), 4727 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4728 "trace events on existing thread id"), 4729 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4730 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4731 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4732 "system-wide collection from all CPUs"), 4733 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4734 "list of cpus to monitor"), 4735 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4736 "child tasks do not inherit counters"), 4737 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4738 "number of mmap data pages", evlist__parse_mmap_pages), 4739 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4740 "user to profile"), 4741 OPT_CALLBACK(0, "duration", &trace, "float", 4742 "show only events with duration > N.M ms", 4743 trace__set_duration), 4744 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4745 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4746 OPT_BOOLEAN('T', "time", &trace.full_time, 4747 "Show full timestamp, not time relative to first start"), 4748 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4749 "Show only syscalls that failed"), 4750 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4751 "Show only syscall summary with statistics"), 4752 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4753 "Show all syscalls and summary with statistics"), 4754 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, 4755 "Show errno stats per syscall, use with -s or -S"), 4756 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4757 "Trace pagefaults", parse_pagefaults, "maj"), 4758 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4759 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4760 OPT_CALLBACK(0, "call-graph", &trace.opts, 4761 "record_mode[,record_size]", record_callchain_help, 4762 &record_parse_callchain_opt), 4763 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, 4764 "Use libtraceevent to print the tracepoint arguments."), 4765 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4766 "Show the kernel callchains on the syscall exit path"), 4767 OPT_ULONG(0, "max-events", &trace.max_events, 4768 "Set the maximum number of events to print, exit after that is reached. "), 4769 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4770 "Set the minimum stack depth when parsing the callchain, " 4771 "anything below the specified depth will be ignored."), 4772 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4773 "Set the maximum stack depth when parsing the callchain, " 4774 "anything beyond the specified depth will be ignored. " 4775 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4776 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4777 "Sort batch of events before processing, use if getting out of order events"), 4778 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4779 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4780 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4781 "per thread proc mmap processing timeout in ms"), 4782 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4783 trace__parse_cgroups), 4784 OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay, 4785 "ms to wait before starting measurement after program " 4786 "start"), 4787 OPTS_EVSWITCH(&trace.evswitch), 4788 OPT_END() 4789 }; 4790 bool __maybe_unused max_stack_user_set = true; 4791 bool mmap_pages_user_set = true; 4792 struct evsel *evsel; 4793 const char * const trace_subcommands[] = { "record", NULL }; 4794 int err = -1; 4795 char bf[BUFSIZ]; 4796 struct sigaction sigchld_act; 4797 4798 signal(SIGSEGV, sighandler_dump_stack); 4799 signal(SIGFPE, sighandler_dump_stack); 4800 signal(SIGINT, sighandler_interrupt); 4801 4802 memset(&sigchld_act, 0, sizeof(sigchld_act)); 4803 sigchld_act.sa_flags = SA_SIGINFO; 4804 sigchld_act.sa_sigaction = sighandler_chld; 4805 sigaction(SIGCHLD, &sigchld_act, NULL); 4806 4807 trace.evlist = evlist__new(); 4808 trace.sctbl = syscalltbl__new(); 4809 4810 if (trace.evlist == NULL || trace.sctbl == NULL) { 4811 pr_err("Not enough memory to run!\n"); 4812 err = -ENOMEM; 4813 goto out; 4814 } 4815 4816 /* 4817 * Parsing .perfconfig may entail creating a BPF event, that may need 4818 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4819 * is too small. This affects just this process, not touching the 4820 * global setting. If it fails we'll get something in 'perf trace -v' 4821 * to help diagnose the problem. 4822 */ 4823 rlimit__bump_memlock(); 4824 4825 err = perf_config(trace__config, &trace); 4826 if (err) 4827 goto out; 4828 4829 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4830 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4831 4832 /* 4833 * Here we already passed thru trace__parse_events_option() and it has 4834 * already figured out if -e syscall_name, if not but if --event 4835 * foo:bar was used, the user is interested _just_ in those, say, 4836 * tracepoint events, not in the strace-like syscall-name-based mode. 4837 * 4838 * This is important because we need to check if strace-like mode is 4839 * needed to decided if we should filter out the eBPF 4840 * __augmented_syscalls__ code, if it is in the mix, say, via 4841 * .perfconfig trace.add_events, and filter those out. 4842 */ 4843 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4844 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4845 trace.trace_syscalls = true; 4846 } 4847 /* 4848 * Now that we have --verbose figured out, lets see if we need to parse 4849 * events from .perfconfig, so that if those events fail parsing, say some 4850 * BPF program fails, then we'll be able to use --verbose to see what went 4851 * wrong in more detail. 4852 */ 4853 if (trace.perfconfig_events != NULL) { 4854 struct parse_events_error parse_err; 4855 4856 parse_events_error__init(&parse_err); 4857 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); 4858 if (err) 4859 parse_events_error__print(&parse_err, trace.perfconfig_events); 4860 parse_events_error__exit(&parse_err); 4861 if (err) 4862 goto out; 4863 } 4864 4865 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4866 usage_with_options_msg(trace_usage, trace_options, 4867 "cgroup monitoring only available in system-wide mode"); 4868 } 4869 4870 #ifdef HAVE_BPF_SKEL 4871 if (!trace.trace_syscalls) 4872 goto skip_augmentation; 4873 4874 trace.skel = augmented_raw_syscalls_bpf__open(); 4875 if (!trace.skel) { 4876 pr_debug("Failed to open augmented syscalls BPF skeleton"); 4877 } else { 4878 /* 4879 * Disable attaching the BPF programs except for sys_enter and 4880 * sys_exit that tail call into this as necessary. 4881 */ 4882 struct bpf_program *prog; 4883 4884 bpf_object__for_each_program(prog, trace.skel->obj) { 4885 if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit) 4886 bpf_program__set_autoattach(prog, /*autoattach=*/false); 4887 } 4888 4889 err = augmented_raw_syscalls_bpf__load(trace.skel); 4890 4891 if (err < 0) { 4892 libbpf_strerror(err, bf, sizeof(bf)); 4893 pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf); 4894 } else { 4895 augmented_raw_syscalls_bpf__attach(trace.skel); 4896 trace__add_syscall_newtp(&trace); 4897 } 4898 } 4899 4900 err = bpf__setup_bpf_output(trace.evlist); 4901 if (err) { 4902 libbpf_strerror(err, bf, sizeof(bf)); 4903 pr_err("ERROR: Setup BPF output event failed: %s\n", bf); 4904 goto out; 4905 } 4906 trace.syscalls.events.bpf_output = evlist__last(trace.evlist); 4907 assert(!strcmp(evsel__name(trace.syscalls.events.bpf_output), "__augmented_syscalls__")); 4908 skip_augmentation: 4909 #endif 4910 err = -1; 4911 4912 if (trace.trace_pgfaults) { 4913 trace.opts.sample_address = true; 4914 trace.opts.sample_time = true; 4915 } 4916 4917 if (trace.opts.mmap_pages == UINT_MAX) 4918 mmap_pages_user_set = false; 4919 4920 if (trace.max_stack == UINT_MAX) { 4921 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 4922 max_stack_user_set = false; 4923 } 4924 4925 #ifdef HAVE_DWARF_UNWIND_SUPPORT 4926 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 4927 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 4928 } 4929 #endif 4930 4931 if (callchain_param.enabled) { 4932 if (!mmap_pages_user_set && geteuid() == 0) 4933 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 4934 4935 symbol_conf.use_callchain = true; 4936 } 4937 4938 if (trace.evlist->core.nr_entries > 0) { 4939 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); 4940 if (evlist__set_syscall_tp_fields(trace.evlist)) { 4941 perror("failed to set syscalls:* tracepoint fields"); 4942 goto out; 4943 } 4944 } 4945 4946 if (trace.sort_events) { 4947 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 4948 ordered_events__set_copy_on_queue(&trace.oe.data, true); 4949 } 4950 4951 /* 4952 * If we are augmenting syscalls, then combine what we put in the 4953 * __augmented_syscalls__ BPF map with what is in the 4954 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 4955 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 4956 * 4957 * We'll switch to look at two BPF maps, one for sys_enter and the 4958 * other for sys_exit when we start augmenting the sys_exit paths with 4959 * buffers that are being copied from kernel to userspace, think 'read' 4960 * syscall. 4961 */ 4962 if (trace.syscalls.events.bpf_output) { 4963 evlist__for_each_entry(trace.evlist, evsel) { 4964 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 4965 4966 if (raw_syscalls_sys_exit) { 4967 trace.raw_augmented_syscalls = true; 4968 goto init_augmented_syscall_tp; 4969 } 4970 4971 if (trace.syscalls.events.bpf_output->priv == NULL && 4972 strstr(evsel__name(evsel), "syscalls:sys_enter")) { 4973 struct evsel *augmented = trace.syscalls.events.bpf_output; 4974 if (evsel__init_augmented_syscall_tp(augmented, evsel) || 4975 evsel__init_augmented_syscall_tp_args(augmented)) 4976 goto out; 4977 /* 4978 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 4979 * Above we made sure we can get from the payload the tp fields 4980 * that we get from syscalls:sys_enter tracefs format file. 4981 */ 4982 augmented->handler = trace__sys_enter; 4983 /* 4984 * Now we do the same for the *syscalls:sys_enter event so that 4985 * if we handle it directly, i.e. if the BPF prog returns 0 so 4986 * as not to filter it, then we'll handle it just like we would 4987 * for the BPF_OUTPUT one: 4988 */ 4989 if (evsel__init_augmented_syscall_tp(evsel, evsel) || 4990 evsel__init_augmented_syscall_tp_args(evsel)) 4991 goto out; 4992 evsel->handler = trace__sys_enter; 4993 } 4994 4995 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { 4996 struct syscall_tp *sc; 4997 init_augmented_syscall_tp: 4998 if (evsel__init_augmented_syscall_tp(evsel, evsel)) 4999 goto out; 5000 sc = __evsel__syscall_tp(evsel); 5001 /* 5002 * For now with BPF raw_augmented we hook into 5003 * raw_syscalls:sys_enter and there we get all 5004 * 6 syscall args plus the tracepoint common 5005 * fields and the syscall_nr (another long). 5006 * So we check if that is the case and if so 5007 * don't look after the sc->args_size but 5008 * always after the full raw_syscalls:sys_enter 5009 * payload, which is fixed. 5010 * 5011 * We'll revisit this later to pass 5012 * s->args_size to the BPF augmenter (now 5013 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 5014 * so that it copies only what we need for each 5015 * syscall, like what happens when we use 5016 * syscalls:sys_enter_NAME, so that we reduce 5017 * the kernel/userspace traffic to just what is 5018 * needed for each syscall. 5019 */ 5020 if (trace.raw_augmented_syscalls) 5021 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 5022 evsel__init_augmented_syscall_tp_ret(evsel); 5023 evsel->handler = trace__sys_exit; 5024 } 5025 } 5026 } 5027 5028 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 5029 return trace__record(&trace, argc-1, &argv[1]); 5030 5031 /* Using just --errno-summary will trigger --summary */ 5032 if (trace.errno_summary && !trace.summary && !trace.summary_only) 5033 trace.summary_only = true; 5034 5035 /* summary_only implies summary option, but don't overwrite summary if set */ 5036 if (trace.summary_only) 5037 trace.summary = trace.summary_only; 5038 5039 if (output_name != NULL) { 5040 err = trace__open_output(&trace, output_name); 5041 if (err < 0) { 5042 perror("failed to create output file"); 5043 goto out; 5044 } 5045 } 5046 5047 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 5048 if (err) 5049 goto out_close; 5050 5051 err = target__validate(&trace.opts.target); 5052 if (err) { 5053 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5054 fprintf(trace.output, "%s", bf); 5055 goto out_close; 5056 } 5057 5058 err = target__parse_uid(&trace.opts.target); 5059 if (err) { 5060 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5061 fprintf(trace.output, "%s", bf); 5062 goto out_close; 5063 } 5064 5065 if (!argc && target__none(&trace.opts.target)) 5066 trace.opts.target.system_wide = true; 5067 5068 if (input_name) 5069 err = trace__replay(&trace); 5070 else 5071 err = trace__run(&trace, argc, argv); 5072 5073 out_close: 5074 if (output_name != NULL) 5075 fclose(trace.output); 5076 out: 5077 trace__exit(&trace); 5078 #ifdef HAVE_BPF_SKEL 5079 augmented_raw_syscalls_bpf__destroy(trace.skel); 5080 #endif 5081 return err; 5082 } 5083